論文 - 山場 久昭
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画像内の反射成分の干渉下でも検出性能を維持できる画像中のプライバシーリスク検出手法 査読あり
臼崎翔太郎，油田健太郎，山場久昭，朴美娘，岡崎直宣
情報処理学会 67 ( 3 ) 588 - 604 2026年3月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
DOI： 10.20729/0002008648
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MIXVRT: MIX Visual Regression Testing Tool Which Mixes Image Comparison and HTML Code Comparison 査読あり
Aridome N., Takahashi N., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics Networking and Artificial Life 11 ( 3 ) 214 - 219 2026年3月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics Networking and Artificial Life
Image-based visual regression testing has the problem that it takes time required to find layout defects. Therefore, this paper develops MIXVRT (MIX Visual Regression Testing tool), which mixes image comparison and HTML code comparison. It highlights the layout defects. From evaluation experiments, we have confirmed that the time required to find layout defects can be reduced compared to the conventional methods of image-based visual regression testing, while detecting them accurately without omissions or false detections.
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Kimura Y., Takahashi N., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics Networking and Artificial Life 11 ( 3 ) 220 - 225 2026年3月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics Networking and Artificial Life
An effective approach to manage the content entered in forms is the use of electronic forms. However, if you use a paper form, it takes time to generate electronic forms. This paper has implemented a tool for automatic entry fields detection and for labels allocation to reduce the time required to place entry fields. As a result, we have verified that the implemented tool is useful to reduce the time to place entry fields.
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Malware Classification Using Transformer-Based Modeling of API Call Sequences 査読あり
Ryoga Sakai, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Nobuya Takahashi, Mirang Park, Naonobu Okazaki
Proc. 2026 Int'l Symp. on Artificial Life and Robotics (ISAROB 2026) 1254 - 1259 2026年1月
掲載種別：研究論文（国際会議プロシーディングス）
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Investigation of an Authentication Method Using Vibration-Based Secret Cues and a Virtual Dial Interface 査読あり
Takumi Kido, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Nobuya Takahashi, Mirang Park, Naonobu Okazaki
Proc. 2026 Int'l Symp. on Artificial Life and Robotics (ISAROB 2026) 1248 - 1253 2026年1月
掲載種別：研究論文（国際会議プロシーディングス）
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2010年宮崎県口蹄疫を事例とした感染リスク評価指標の構築と防疫支援への応用 査読あり
高塚 佳代子、臼崎 翔太郎、山場 久昭、油田 健太郎、岡崎 直宣
化学工学論文集 52 ( 1 ) 15 - 20 2026年1月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Kagaku Kogaku Ronbunshu
The spread of infectious diseases in the livestock industry results in severe economic losses and social disruption. This study focuses on the 2010 outbreak of foot-and-mouth disease (FMD) in Miyazaki Prefecture, Japan, and proposes a framework for quantitatively assessing farm-level susceptibility to infection through the construction of a Potential Infection Risk Index (λ). This index integrates multiple factors, including spatial proximity between farms, herd size, and livestock species. Statistical analysis reveals that λ values significantly differ between infected and uninfected farms, with the disparity widening as distance from the infection source decreases. These findings indicate that the spread of infection is strongly influenced by both geographic proximity and structural characteristics of farms. Furthermore, λ enables objective and quantitative identification of high-risk farms, supporting practical responses such as the prioritized allocation of limited disease control resources and the flexible application of hygiene management standards. A case study simulating farm relocation demonstrates that λ-based site selection effectively reduces infection risk, thereby validating the index as a practical and economically rational decision-support indicator. This approach also suggests the potential application of λ in long-term farm siting and structural planning. Additionally, the study envisions a comprehensive disease control support system centered on λ and its adjusted form (λ′), incorporating features such as risk visualization, hygiene-related corrections, tailored alerts and recommendations, and integration with administrative decision-making processes. Future work will focus on the development and implementation of such decision-support tools, with the ultimate goal of enhancing disease control efforts and contributing to the sustainable development of the livestock industry.
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Takahashi Nobuya, Kamada Taiki, Usuzaki Shotaro, Aburada Kentaro, Yamaba Hisaaki, Park Mirang, Okazaki Naonobu
IEICE Communications Express 14 ( 12 ) 441 - 444 2025年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：一般社団法人 電子情報通信学会
In this study, we propose a text-based CAPTCHA that utilizes human visual completion to prevent automated programs from getting through, without affecting human cognition. This CAPTCHA requires users to enter the reading of the kanji strings, whose centers are hidden behind a black bar. This method makes it challenging for machines to recognize the characters, while still allowing humans to identify the original text through their visual completion ability. We evaluate both the usability and security of the proposed CAPTCHA. To assess usability, we observed how humans respond to the CAPTCHA challenge. For the security evaluation, we tested the machine’s ability to read the kanji using a Convolutional Neural Network (CNN). The results showed that the proposed CAPTCHA achieves a success rate comparable to traditional CAPTCHAs, with a slightly shorter response time than a similar type of CAPTCHA. Furthermore, security experiments have shown that it exhibits a certain degree of resistance against simple convolutional neural networks.
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An Attempt to Improve the Flow Count Estimation Accuracy During the Collection Phase for Sketch-Reconstruction-Based In-Band Network Telemetry 査読あり
Shotaro Usuzaki, Kosei Iwasa, Nobuya Takahashi, Kentaro Aburada, Hisaaki Yamaba, Mirang Park, Naonobu Okazaki
Proc. of The 9th International Conference on Information Technology 2025年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Applying Deep Reinforcement Learning to Semiconductor Manufacturing Scheduling Problems 査読あり
Kaito Hashimoto, Susumu Katayama, Satoru Arimura, Kousuke Hara, Hisaaki Yamaba
Proc. of 29th International Conference on Knowledge-Based and Intelligent Information & Engineering Systems 1071 - 1080 2025年9月
担当区分：最終著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Slow HTTP POST DDoS Attack Prevention Method that Monitors Payload Size and Number of Connections 査読あり
Yuya Ozaki, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Mirang Park, Naonobu Okazaki
Proc. of the 28-th International Conference on Network-Based Information Systems (NBiS-2025) 22 - 31 2025年9月
掲載種別：研究論文（国際会議プロシーディングス）
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An Attempt of Personal Identification Using S-EMG Signals from Hand Gestures Measured at Multiple Points 査読あり
Hisaaki Yamaba, Naruki Komori ,Shotaro Usuzaki, Kentaro Aburada, Tetsuro Katayama, Naonobu Okazaki
Proc. 2025 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS - TAIWAN 2025年7月
担当区分：筆頭著者, 責任著者 掲載種別：研究論文（国際会議プロシーディングス）
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Aridome N., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 575 - 579 2025年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
As a method for detecting layout defects in web pages, image-based visual regression testing is proposed. However, it has the problem that it takes time to detect unintended layout differences that are not based on HTML code changes. This paper proposes a prototype of MixVRT which is a tool to detect layout defects in web pages. It is a visual regression testing tool that highlights layout defects in web pages. From evaluation experiments, the time find to layout defects can be reduced.
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Kimura Y., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 580 - 584 2025年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
The digitalization of forms is being promoted. One of the effective ways to manage contents filled in fields is using electronic forms. Several tools have been developed to generate them automatically. However, when you use a paper form, the layout of the original form may change, and it takes time to generate electronic one because it is necessary to place fill-in fields on an electronic form by dragging with a mouse. This paper proposes a method for automatic fill-in fields detection and labels assignment to reduce time required to place fill-in fields without changing the layout. The proposed method can reduce the time to place fill-in fields.
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Introducing Generative AI into Unrealistic Image CAPTCHA for Effective Image Generation 査読あり
Kana Saiki, Hisaaki Yamaba, Shotaro Usuzaki, Kentaro Aburada, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
Proc. 2025 Int'l Symp. on Artificial Life and Robotics (ISAROB 2025) 1085 - 1090 2025年1月
担当区分：責任著者 掲載種別：研究論文（国際会議プロシーディングス）
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Introduction of Feature Points in Images for Improvement of Finding Letters Type CAPTCHA Based on Neural Style Transfer 査読あり
Ramu Kiura, Hisaaki Yamaba, Shotaro Usuzaki, Kentaro Aburada, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
Proc. 2025 Int'l Symp. on Artificial Life and Robotics (ISAROB 2025) 1079 - 1084 2025年1月
担当区分：責任著者 掲載種別：研究論文（国際会議プロシーディングス）
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Investigation of Detection Methods for Trojaned DNNs under Specific Conditions 査読あり
Shunya Izaki, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. 2025 Int'l Symp. on Artificial Life and Robotics (ISAROB 2025) 1074 - 1078 2025年1月
掲載種別：研究論文（国際会議プロシーディングス）
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A study of Collaborative malware detection using item response theory 査読あり
Takuro Inada, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. 2025 Int'l Symp. on Artificial Life and Robotics (ISAROB 2025) 1070 - 1073 2025年1月
掲載種別：研究論文（国際会議プロシーディングス）
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Extending BWDM to Support Various Types and Recursive Definitions in VDM++ Test Case Generation 査読あり
Takakura Shota, Katayama Tetsuro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu, Kita Yoshihiro
Journal of Advances in Artificial Life Robotics 4 ( 3 ) 167 - 171 2025年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
Generating test cases from VDM++ formal specifications, which help to eliminate ambiguities, is
both time-consuming and labor-intensive. To solve this problem, our laboratory has developed
BWDM, a tool for automatic test case generation from VDM++ specifications. However, the
original BWDM only supports integer types and cannot handle test cases for operations and
functions with recursive structures. To enhance BWDM's usefulness, this paper introduces
extensions to address these limitations. The results confirm that the extended BWDM can reduce
test case generation time compared to manual methods. -
Applying Deep Reinforcement Learning to Semiconductor Manufacturing Scheduling Problems 査読あり
Hashimoto K., Katayama S., Arimura S., Hara K., Yamaba H.
Procedia Computer Science 270 1071 - 1080 2025年
掲載種別：研究論文（学術雑誌） 出版者・発行元：Procedia Computer Science
In this paper, we proposed a scheduling method for semiconductor manufacturing systems by extending that for a job shop scheduling problem (JSSP) using deep reinforcement learning approach. The proposed method can handle the unique characteristics of the semiconductor manufacturing process, i.e., the reentrancy and the flexibility. The advantage of the proposed method is scalable and can effectively handle increasing problem sizes. From the results of experiments, we confirmed that even when small-sized tasks were used in the training, the scheduling performance for large-sized tasks was equal to or better than the case using large-sized tasks in the training.
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Yamaba H., Komori N., Usuzaki S., Aburada K., Katayama T., Okazaki N.
Icce Taiwan 2025 12th IEEE International Conference on Consumer Electronics Taiwan Generative AI in Innovative Consumer Technology Proceedings 111 - 112 2025年
掲載種別：研究論文（学術雑誌） 出版者・発行元：Icce Taiwan 2025 12th IEEE International Conference on Consumer Electronics Taiwan Generative AI in Innovative Consumer Technology Proceedings
Mobile devices such as smartphones and tablets are now deeply integrated into daily life. To prevent shoulder surfing attacks, we propose a user authentication method for mobile devices based on surface electromyogram (s-EMG) signals. The method uses a “pass-gesture,” a sequence of hand gestures that can be changed like a password. Fingerspelling was adopted as the source of gesture candidates. Previous studies confirmed high accuracy in identifying gestures performed by the same subject. This paper focuses on evaluating subject specificity-specifically, confirming that a model trained on one user fails to recognize gestures performed by another. Experimental results show that the system does not generalize across users, indicating robustness against impersonation.
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Usuzaki S., Iwasa K., Takahashi N., Aburada K., Yamaba H., Park M., Okazaki N.
Proceedings 9th International Conference on Information Technology Incit 2025 545 - 552 2025年
掲載種別：研究論文（学術雑誌） 出版者・発行元：Proceedings 9th International Conference on Information Technology Incit 2025
In this paper, we discuss a sketch-reconstructionbased In-band Network Telemetry (INT) method that can achieve practical flow count estimation accuracy during sketch collection. Measuring and aggregating per-flow information of network traffic helps to monitor the current network-wide status. Sketch-reconstruction-based INT methods were proposed to efficiently collect flow information measured by each device, which combine sketch techniques and INT. Sketch is a probabilistic algorithm that can estimate the count of entire flows with limited memory, and INT can carry measured data on the network device piggybacked in the business packet header. The combination of sketch and INT can reduce bandwidth consumption for collecting per-flow information, as the sketch can be regarded as a compact aggregation of the per-flow data. To minimize overhead, these methods split a sketch into smaller units called sketchlets and transmit them. The sent sketchlets are reconstructed into a sketch at the collection destination. However, existing methods have the disadvantage that they require a long time to collect sketchlets because they randomly select them, and the accuracy is low during the collection. In this study, we propose a new sketchlet algorithm, called HitFlow Sketchlet, that prioritizes sending buckets necessary for the sketch's query algorithm to function, which each method does not fully consider. We also propose the Flag data structure, aiming at the comprehensive sketchlet transmission. Evaluation experiments showed that HitFlow Sketchlet can output accurate estimates, especially in the earliest epochs, and that by combining it with Flag, comprehensiveness can be improved.
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ASLA: Automatic Segmentation and Labeling by Deep Learning for Document Pictures 査読あり
Kakinoki K., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics, Networking and Artificial Life 10 ( 4 ) 362 - 367 2024年9月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
In this paper, we propose ASLA, a segmentation and label generation system for document pictures. ASLA reduces the duration needed for separating document pictures into areas and label generation. By using the application example, we have verified that ASLA operates properly. We have evaluated the usefulness of ASLA in regard to time and accuracy. We have assessed the efficacy of the rule-based area correction method. As a result, we have verified that ASLA is useful.
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Onaga H., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics, Networking and Artificial Life 10 ( 4 ) 336 - 341 2024年9月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
It is difficult for mobile application developers to understand the structure of large and complex mobile applications. To support iOS application development, we proposed SwiftDiagram: a visualization of the static structure of Swift source code, and demonstrated its usefulness. To further support them, this paper has implemented RAGESS(Real-time Automatic Generation of SwiftDiagram System), which is a software visualization tool. RAGESS performs static analysis on Swift source code and automatically generates the corresponding SwiftDiagram whenever the target project build succeeds.
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An Attempt to Solve Fill in the Missing Letters CAPTCHA Using Generative AI 査読あり
Yamaba H., Usuzaki S., Aburada K., Mukunoki M., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1322 LNEE 385 - 395 2024年8月
担当区分：筆頭著者, 責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes in Electrical Engineering
This paper reports an attempt to solve the fill in the missing letters type CAPTCHA using generative AI. Many websites have adopted CAPTCHA to prevent bots and other automated programs from engaging in malicious activities such as posting comment spam. Text-based CAPTCHA is the most common and earliest form of CAPTCHA. However, as optical character recognition (OCR) technology has improved, the intensity of distortions applied to a CAPTCHA to keep it unrecognizable by OCR has also increased. This has reached a point where humans are having difficulty recognizing CAPTCHA text. The CAPTCHA proposed in the previous study asks users to spell a word by filling in some blanks. Since the number of letters displayed is minimal, it is challenging to identify the correct word. However, one or more images that can serve as hints to help users guess the answer word are also provided. It is expected that the ability to guess can distinguish between humans and computers. However, it is conceivable that generative AI, which has been advancing in recent years, can substitute for this ability. A series of experiments was carried out to evaluated the performance of the generative AI’s ability to solve the proposed CAPTCHA. First, we examined whether a well-known image recognition system could accurately identify the images used in the CAPTCHA problems. Next, we used the recognition results to have the generative AI solve the CAPTCHA problems and determined the accuracy rate. Additionally, we evaluated the performance of the generative AI itself by solving the problems using the correct identification of each image. From the experimental results, it was found that the CAPTCHA is relatively robust against attack techniques using generative AI.
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Evacuation Support System for Tsunami Disasters that Considers Shelter Congestion 査読あり
Nishi H., Nabeyama K., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1322 LNEE 51 - 62 2024年8月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes in Electrical Engineering
When a tsunami occurs, an evacuation support system capable of providing information on evacuation routes and shelter locations would enable evacuations to be conducted more swiftly and safely. In previous research, a proposal was made for an evacuation support system using low-power, long-distance communication. However, a challenge arose when shelter locations reached full capacity, requiring information to be shared, which in turn necessitated redirection of evacuees to alternative shelters. Therefore, in this study, a method for sharing shelter congestion information at an earlier stage was developed. The method of sharing based on the remaining capacity of shelters increased evacuation completion by up to 29 evacuees in an evacuee population of 1000.
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Usability improvement in color constancy CAPTCHA 査読あり
Usuzaki Shotaro, Yihan Wang, Aburada Kentaro, Yamaba Hisaaki, Takatsuka Kayoko, Katayama Tetsuro, Park Mirang, Okazaki Naonobu
IEICE Communications Express 13 ( 8 ) 331 - 334 2024年8月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：一般社団法人 電子情報通信学会
CAPTCHAs have traditionally been used to deter bots, but ensuring protection against machine learning attacks has become difficult. To tackle this problem, we proposed a CAPTCHA based on color constancy, a human cognitive ability that is difficult for machines to reproduce. Although this method achieved high attack resistance while maintaining usability compared to existing CAPTCHAs, the response time increased due to the color selection operation. To address this, we changed the task to a click-type format while keeping the original concept. Our experimental results show that our method matches the response times of existing CAPTCHAs without compromising attack resistance.
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Okazaki N., Usuzaki S., Waki T., Kawagoe H., Park M., Yamaba H., Aburada K.
Future Internet 16 ( 8 ) 2024年8月
掲載種別：研究論文（学術雑誌） 出版者・発行元：Future Internet
We propose a detection system incorporating a weighted voting mechanism that reflects the vote’s reliability based on the accuracy of each detector’s examination, which overcomes the problem of cooperative detection. Collaborative malware detection is an effective strategy against zero-day attacks compared to one using only a single detector because the strategy might pick up attacks that a single detector overlooked. However, cooperative detection is still ineffective if most anti-virus engines lack sufficient intelligence to detect zero-day malware. Most collaborative methods rely on majority voting, which prioritizes the quantity of votes rather than the quality of those votes. Therefore, our study investigated the zero-day malware detection accuracy of the collaborative system that optimally rates their weight of votes based on their malware categories of expertise of each anti-virus engine. We implemented the prototype system with the VirusTotal API and evaluated the system using real malware registered in MalwareBazaar. To evaluate the effectiveness of zero-day malware detection, we measured recall using the inspection results on the same day the malware was registered in the MalwareBazaar repository. Through experiments, we confirmed that the proposed system can suppress the false negatives of uniformly weighted voting and improve detection accuracy against new types of malware.
DOI： 10.3390/fi16080259
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Prototype of RAGESS Which Is a Tool for Automatically Generating SwiftDiagram to Support iOS App Development 査読あり
H. Onaga, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2024 Int'l Conf. on Artificial Life and Robotics (ICAROB 2024) 252 - 256 2024年2月
掲載種別：研究論文（国際会議プロシーディングス）
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Extension to Support Types and Operation/Function Definitions in BWDM to Generate Test Case Tool from the VDM++ Specification 査読あり
S. Takakura, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2024 Int'l Conf. on Artificial Life and Robotics (ICAROB 2024) 257 - 261 2024年2月
掲載種別：研究論文（国際会議プロシーディングス）
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Proposal of ASLA Which Is a Segmentation and Labeling Tool for Document Images Based on Deep Learning 査読あり
K. Kakinoki, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2024 Int'l Conf. on Artificial Life and Robotics (ICAROB 2024) 262 - 266 2024年2月
掲載種別：研究論文（国際会議プロシーディングス）
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Investigation of malware classification based on image representation 査読あり
Hyoga Kawagoe, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. 2024 Int'l Symp. on Artificial Life and Robotics (ISAROB 2024) 929 - 932 2024年1月
掲載種別：研究論文（国際会議プロシーディングス）
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On an improvement of hand gesture recognition for realizing an s-EMG based user authentication using finger spelling 査読あり
Hisaaki Yamaba, Naoki Sawagashira, Kentaro Aburada, Tetsuro Katayama, Naonobu Okazaki
Proc. 2024 Int'l Symp. on Artificial Life and Robotics (ISAROB 2024) 933 - 938 2024年1月
担当区分：筆頭著者, 責任著者 掲載種別：研究論文（国際会議プロシーディングス）
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Proposal of a DDoS Attack Detection Method Using the Communication Interval 査読あり
Iwasa K., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1114 LNEE 165 - 174 2024年
掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes in Electrical Engineering
As the scale of Distributed Denial of Service (DDoS) attacks has been escalating in recent years, the need for real-time detection of attacks has increased. Existing intrusion detection systems (IDSs) perform detection with a fixed window size (assumed to be in hours). In previous research, attack detection was performed by preparing windows of multiple sizes, selecting the appropriate window based on the state of the data, and using features learned in advance for that window size. Although this method yielded a high DDoS attack detection rate of 98.30%, it exhibited a considerable false-positive rate of 7.37%. The proposed method measures the communication intervals of identical packets within the window, identified as attack-related in the previous survey, and classifies those packets with an average communication interval below a set threshold as attacks. The experiment resulted in a 50.2% decrease in the false-positive rate.
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Proposal of Fill in the Missing Letters CAPTCHA Using Associations from Images 査読あり
Yamaba H., Mustaza M.N.F.B., Usuzaki S., Aburada K., Mukunoki M., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1114 LNEE 206 - 217 2024年
担当区分：筆頭著者, 責任著者 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes in Electrical Engineering
This paper proposes a new fill in the missing letters type CAPTCHA using associations from images. Many web sites have adopted CAPTCHA to prevent bots and other automated programs from malicious activities such as posting comment spam. Text-based CAPTCHA is the most common and earliest CAPTCHA. But as optical character recognition (OCR) technology has improved, the intensity of distortions that must be applied to a CAPTCHA for it to remain unrecognizable by OCR has increased. This has reached a point where humans are having difficulty recognizing CAPTCHA text. The idea of the proposed CAPTCHA asks users to spell a word by filling some blanks. Since the number of shown letters are few, it is difficult to answer the correct word. But one or more images that can be used as hints to guess what is the answer word are also shown to the users. A series of experiments was carried out to evaluated the performance of the proposed CAPTCHA. First, a computer program was developed with various software languages for the usability evaluation. The system was used for the experiments to find the suitable parameters of the CAPTCHA such as numbers of letters that will be disclosed, position of disclosed letters. Next, security evaluation experiments were carried out using the system under the obtained parameters. The results of the experiments showed that the performance and limitation of the proposed CAPTCHA.
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Study of an Image-Based CAPTCHA that is Resistant to Attacks Using Image Recognition Systems 査読あり
Nishikawa S., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1114 LNEE 175 - 184 2024年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes in Electrical Engineering
In today’s digital age, image-based CAPTCHAs are increasingly vulnerable to attacks using annotation services, which tag images and classify images according to their contents, or reverse image search services. To prevent such attacks, an image-based CAPTCHA was proposed that takes advantage of the fact that humans can correctly recognize images containing many discontinuous points, while existing image recognition systems misrecognize them. However, this CAPTCHA proved susceptible to attacks using noise reduction filters. The objective of the present study is to create a CAPTCHA using images that are resistant to such filters. Images used in the new CAPTCHA were realized by increasing the proportion of lines forming discontinuous surfaces in images. Experimental results demonstrated a human recognition rate of 95.8%, with the image recognition systems successfully identifying only one image overall. Moreover, when a noise reduction filter was applied, the recognition rate was lower than those reported in previous studies.
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Development of keypads which use colors or shapes to prevent shoulder surfing 査読あり
Masuzawa R., Aburada K., Yamaba H., Katayama T., Okazaki N.
Artificial Life and Robotics 28 ( 4 ) 710 - 717 2023年11月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Artificial Life and Robotics
In conventional smart phones and ATMs, a four-digit passcode is entered into a keypad, and the user confirms whether the passcode matches the keypad. However, there is a risk that a third party can easily steal the password by watching the code entry or analyzing the position of fingerprints left on the keypad. There are other solutions, such as biometric authentication or the use of special displays, but both of them are costly and difficult to implement. In this study, we propose a keypad that does not leave fingerprints on the screen, is low cost, and can be used to input passcodes without worry, even if someone is standing next to it. The proposed keypad uses cursors that are moved by directional keys to select numbers, making fingerprint analysis difficult. Because attackers do not know the color that the user has selected, they cannot know which cursor the user is moving. To verify the safety and convenience of this system, we conducted experiments on subjects in their 20 s and 50 s. The results showed that the average difference in authentication time from the conventional method was about 5 s, and the method was generally convenient. We conclude that our keypad system is secure, because no peeping attacks on a subject were successful in guessing the subject’s passcode.
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Tsunami evacuation simulation considering road width in Aoshima district 査読あり
Nabeyama K., Usuzaki S., Aburada K., Yamaba H., Katayama T., Okazaki N.
Artificial Life and Robotics 28 ( 4 ) 779 - 788 2023年11月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Artificial Life and Robotics
Japan is one of the countries in the world where natural disasters occur most frequently. Typhoons, earthquakes, tsunamis, volcanic eruptions, and many other natural disasters occur in Japan every year, and the risks are immeasurable. Japan is especially prone to earthquakes because of its location on the North American Plate, Eurasian Plate, Pacific Plate, and Philippine Sea Plate. Preparation for a Nankai Trough earthquake is one of the most important issues. A Nankai trough earthquake is predicted to occur with a probability of 70–80% within 30 years. Accordingly, a tsunami of more than 10 ms is expected to hit a wide area along the Pacific coast from the Kanto region to the Kyushu region, and the impact is expected to be significant. When a tsunami warning is issued, an evacuation support system that provides information on evacuation sites and routes enables faster and safer evacuation actions. In a previous study conducted in our laboratory, we proposed an evacuation support system using Low-Power Wide-Area communications and conducted a simulation to find ways to improve the evacuation support system. However, the simulation was insufficient in that it did not consider delays in evacuation completion time due to road congestion caused by limited road width, which can be expected in an actual disaster. In our current research, as an improvement to make the simulation more realistic for further developing our evacuation support system, we propose a simulation that considers road width. We examined how adoption of this simulation methodology would affect the simulation results by comparing simulations that did and did not consider road width. As a result, the proposed method showed a lower percentage of completed evacuations than the previous simulation, especially for children and the elderly. The reason for this result is that when evacuations begin simultaneously, crowding occurs as people all rush to evacuation centers. This congestion on the roads near evacuation centers prevents people from completing their evacuations. Such a phenomenon is expected to occur not only in simulations but also on actual roads. For this reason, our proposed simulation method that considers road width is a more realistic simulation. Since evacuations by car in the event of a disaster also occur, a future issue is to simulate car congestion as well. Furthermore, simulating what would happen if a disaster made a road impassable is also important.
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Tende I.G., Aburada K., Yamaba H., Katayama T., Okazaki N.
Agriculture (Switzerland) 13 ( 3 ) 2023年3月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Agriculture (Switzerland)
Prediction of crop yields is very helpful in ensuring food security, planning harvest management (storage, transport, and labor), and performing market planning. However, in Tanzania, where a majority of the population depends on crop farming as a primary economic activity, the digital tools for predicting crop yields are not yet available, especially at the grass-roots level. In this study, we developed and evaluated Maize Yield Prediction System (MYPS) that uses a short message service (SMS) and the Web to allow rural farmers (via SMS on mobile phones) and government officials (via Web browsers) to predict district-level end-of-season maize yields in Tanzania. The system uses LSTM (Long Short-Term Memory) deep learning models to forecast district-level season-end maize yields from remote sensing data (NDVI on the Terra MODIS satellite) and climate data [maximum temperature, minimum temperature, soil moisture, and precipitation (rainfall)]. The key findings reveal that our unimodal and bimodal deep learning models are very effective in predicting crop yields, achieving mean absolute percentage error (MAPE) scores of 3.656% and 6.648%, respectively, on test (unseen) data. This system will help rural farmers and the government in Tanzania make critical decisions to prevent hunger and plan better harvesting and marketing of crops.
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Saputra M.C., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 352 - 356 2023年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
The outbreak of the COVID-19 pandemic changed the model of the learning process. Online learning became one of the best solutions for many educational institutions, including the University, especially the Faculty of Computer Science, Brawijaya University. The continuance intention factor for using an online learning management system is important to ensure learning sustainability. To understand students' continuance intention this study proposes self determination model as a research model to find the factors affecting students' continuance intention toward online learning management systems. The proposed model is useful for investigating continuance intention factors. The study finds that intrinsic regulation, external regulation, identified regulation, and introjected regulation significantly positive impact on continuance intention in learning management systems. Finally, this study provides suggestions for the Faculty to improve the continuance intention of the student in using an online learning management system.
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Miyashita T., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 347 - 351 2023年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
TDD is a development methodology that brings us closer to better implementation and testing by repeating a series of steps: test design, implementation that satisfies the tests, and refactoring. This paper proposes a framework aimed at supporting the implementation steps in TDD. The proposed framework generates source code that passes tests while retaining refactoring by the developer. The prototyped framework reduced the time required for the implementation process by 94.22% and the generation time by 66.17% compared to manual work.
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On an improvement of hand gesture recognition for realizing a user authentication system using s-EMG
Soichiro Ishibashi, Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Naonobu Okazaki
Proc. of the 28th International Symposium on Artificial Life and Robotics 968 - 972 2023年1月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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A study of improving the safety of defense system based on whitelist
Tsubasa Waki, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, and Naonobu Okazaki
Proc. of the 28th International Symposium on Artificial Life and Robotics 963 - 967 2023年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Investigation of evacuation simulation from Tsunami considering road width in Aosima
Keita Nabeyama, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, and Naonobu Okazaki
Proc. of the 28th International Symposium on Artificial Life and Robotics 953 - 958 2023年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Investigation of PIN authentication schemes resistant to video-based recording attacks
Ryo Masuzawa, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park and Naonobu Okazaki
Proc. of the 28th International Symposium on Artificial Life and Robotics 959 - 962 2023年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Analysis of Self Determination Factors for Continuance Intention on Online Learning Management System 査読あり
Saputra Mochamad Chandra, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu, Wicaksono Satrio Agung
Journal of Robotics, Networking and Artificial Life 10 ( 1 ) 91 - 95 2023年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
The COVID-19 pandemic outbreak transformed the paradigm of the educational process. Many educational institutions, including the University, mainly the Faculty of Computer Science, Brawijaya University, have experienced success with learning through the Internet. The continuance intention factor for using an online learning management system is important to ensure learning sustainability. This study investigates continuance intention factor by using self determination model as a research model. The objective of this study is to find the factor factors affecting students' continuance intention toward online learning management systems. The proposed model is useful for investigating continuance intention factors. The study finds that intrinsic regulation, external regulation, identified regulation, and introjected regulation significantly positive impact on continuance intention in learning management systems. Finally, this study provides suggestions for the Faculty to improve the continuance intention of the student in using an online learning management system.
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Prototype of the Framework CATdd to Support Continuous Development in Test Driven Development 査読あり
Miyashita Takeaki, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 4 ( 1 ) 35 - 40 2023年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
TDD is a development methodology to improve software quality. In this study, we prototype the framework CATdd (Continuous Automated Test Driven Development), which supports continuous development with TDD. CATdd reduces the time of implementation step in TDD by generating new source code that passes tests using LLM. CATdd maintains consistency with other source code in the project by using existing source code and related source code to prompt. As a result of the evaluation experiments, the time for the implementation step in TDD was reduced by 94% for a simple task and by 56% for another more complex task. In conclusion, CATdd is useful to support continuous development.
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Expansion of Application Scope and Addition of a Function for Operations into BWDM which is an Automatic Test Cases Generation Tool for VDM++ Specification 査読あり
Muto Takafumi, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 9 ( 3 ) 255 - 262 2022年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
The use of the formal specification description language VDM++ in software design can eliminate ambiguity in the specification. However, software testing after implementation is necessary even if the design uses VDM++, but manually generating test cases is labor-intensive and time-consuming. Therefore, our laboratory developed BWDM, which is an automatic test case generation tool for VDM++ specifications. However, BWDM is not very useful because it has three problems about its narrow scope of application. This paper solves the three problems and improves the usefulness of BWDM by expanding the scope of application of VDM++ definitions and adding a function to generate test cases for object states. In addition, we conducted a comparison experiment with manual test case generation and confirmed that BWDM can reduce work time.
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Proposal of Gamma Which Is a Messaging Platform for Spatial Data 査読あり
Ueda Takahiro, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 9 ( 2 ) 136 - 142 2022年9月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
This paper proposes Gamma, which is a messaging platform for spatial data. Gamma uses distributed MQTT system for spatial data sharing, and this paper aims to improve the usefulness of distributed MQTT system. In the experiment, it has been found that Gamma can process more messages than a single MQTT broker. It is confirmed that Gamma achieves scalability by increasing the number of Gateways and distributed MQTT brokers. Furthermore, it is confirmed that the efficiency of the distributed MQTT system can be improved by setting the responsibility area of Gateways.
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Detection of Blob and Feature Envy Smells in a Class Diagram using Class's Features 査読あり
Priyambadha Bayu, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 9 ( 1 ) 43 - 48 2022年8月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
Measuring the quality of software design artifacts is difficult due to the limitation of information in the design phase. The class diagram is one of the design artifacts produced during the design phase. The syntactic and semantic information in the class is essential to consider in the measurement process. Smell detection uses class-related information to detect the smell as an indicator of a lack of quality. Several classifiers use all information related to the class to prove how informative it for the smell detection process. The smell types that are a concern in this research are Blob and Feature Envy. The experiment using three classifiers (j48, Multi-Layer Perceptron, and Naïve Bayes) confirms that Blob smell detection utilizes the information successfully. On the other hand, Feature Envy still needs more elaboration. The average true positive rate by the classifiers is about 80.67%.
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Proposal of a Method to Generate Classes and Instance Variable Definitions in VDM++ Specification by Using Machine Learning 査読あり
Suga Kensuke, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 2 ( 4 ) 189 - 194 2022年3月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
Writing VDM++ specifications is difficult. The existing method can automatically generate only type and constant definitions in VDM++ specification from natural language specification by using machine learning. This paper proposes a method to generate classes and instance variable definitions in VDM++ specification from natural language specification to improve the usefulness of the existing method. From the evaluation experiment by using F- values, it has been confirmed that the proposed method can improve the usefulness of the existing method.
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Proposal for a blockchain based agricultural input voucher system 査読あり
Tende I.G., Aburada K., Yamaba H., Katayama T., Okazaki N.
Artificial Life and Robotics 27 ( 3 ) 461 - 471 2022年1月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Artificial Life and Robotics
Most of the small-scale farmers in Tanzania can’t afford to buy quality agricultural inputs (fertilizers and seeds), therefore the Tanzanian government issues paper-based subsidy vouchers to farmers for buying the inputs at half price. However, challenges like misuse of the vouchers by some government officials (stealing and favoritism in allocation) and lack of trust (difficulty of verifying vouchers’ authenticity) have resulted into low crop productivity for the farmers and loss of government funds. To address this, we have developed agricultural input voucher system which stores and allocates digital subsidy vouchers to farmers in the Hyperledger Fabric blockchain network whose features like hashing and digital signature prevent misuse and ensure trust of the vouchers. Farmers access the digital vouchers through Short Message Service (SMS) in their mobile phones. Evaluation reveals that, the developed system is effective and meets performance demands of Tanzanian farmers. Also, Raft has better performance than Kafka consensus protocol.
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Proposal of Gamma Which Is a Spatial Data Sharing Distributed MQTT System
Ueda Takahiro, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
人工生命とロボットに関する国際会議予稿集 27 188 - 192 2022年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：株式会社ALife Robotics
This paper proposes Gamma, which is a new distributed MQTT system, to improve the usefulness of distributed MQTT systems for sharing spatial data. In the experiment, it has been found that Gamma can process more messages than a single MQTT broker. It is confirmed that Gamma achieves scalability by increasing the number of Gateways and distributed MQTT brokers. Furthermore, it is confirmed that the efficiency of the distributed MQTT system can be improved by setting the responsibility area of Gateways.
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Proposal of a Method to Generate Classes and Instance Variable Definitions in the VDM++ Specification from Natural Language Specification
Suga Kensuke, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
人工生命とロボットに関する国際会議予稿集 27 178 - 182 2022年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：株式会社ALife Robotics
Writing VDM++ specifications is difficult. The existing method can automatically generate type and constant definitions in VDM++ specification from natural language specification using machine learning. This paper proposes a method to generate classes and instance variable definitions in the VDM++ specification from natural language specification to improve the usefulness of the existing method. From the evaluation experiment by using F-values, it has been confirmed that the proposed method can improve the usefulness of the existing method.
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Expansion of Application Scope and Addition of a Function for Operations into BWDM to Generate Test Cases from VDM++ Specification
Muto Takafumi, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
人工生命とロボットに関する国際会議予稿集 27 183 - 187 2022年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：株式会社ALife Robotics
Generating test cases from the VDM++ specification to eliminate ambiguity in the specification is labor-intensive and time-consuming. Therefore, our laboratory developed BWDM, which is an automatic test case generation tool for VDM++ specifications. However, BWDM is not very useful because it has three problems about its narrow scope of application. This paper extends BWDM to solve three problems. In addition, we conducted a comparison experiment with manual test case generation and confirmed a time saving of about 17 minutes.
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Development of an anti-peeping passcode keypad using color/shape cursors
Ryo Masuzawa, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Proc. of the 27th International Symposium on Artificial Life and Robotics 2022年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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An Attempt at Data Augmentation for Realizing User Authentication Using s-EMG Signals
Soichiro Ishibashi, Yuya Yamamoto, Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Naonobu Okazaki
Proc. of the 27th International Symposium on Artificial Life and Robotics 2022年1月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Muto T., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 183 - 187 2022年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
Generating test cases from the VDM++ specification to eliminate ambiguity in the specification is labor-intensive and time-consuming. Therefore, our laboratory developed BWDM, which is an automatic test case generation tool for VDM++ specifications. However, BWDM is not very useful because it has three problems about its narrow scope of application. This paper extends BWDM to solve three problems. In addition, we conducted a comparison experiment with manual test case generation and confirmed a time saving of about 17 minutes.
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リレーアタック耐性とボット耐性の両立を目指したインタラクティブな動画CAPTCHAの提案と評価 査読あり
油田 健太郎, 臼崎 翔太郎, 山場 久昭, 片山 徹郎, 椋木 雅之, 朴 美娘, 岡崎 直宣
情報処理学会論文誌 62 ( 12 ) 1864 - 1878 2021年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Development of a system to detect eye position abnormality based on eye-tracking 査読あり
Uchida, Noriyukia, Takatuka, Kayoko, Yamaba, Hisaaki, Mukunoki, Masayukib, Okazaki, Naonobub
Journal of Robotics, Networking and Artificial Life 8 ( 3 ) 205 - 210 2021年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
Test suite reusability measurement is important to obtain the value of reusability as the degree of effectiveness of reused test suite. The measurement in this experiment considers not only the frequency of the successful test suite to examine different objects but also the code coverage as the criteria of a good test suite. The combination of the frequency and code coverage in the measurement reports the current condition of test suite reusability. The research confirms the test suite reusability measurement provides useful information to know the degree of effectiveness of reused test suite, especially in regression testing and automated testing.
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Proposal for a crop protection information system for rural farmers in Tanzania 査読あり
Tende I.G., Aburada K., Yamaba H., Katayama T., Okazaki N.
Agronomy 11 ( 12 ) 2021年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Agronomy
Crop protection information, such as how to control emergent and outbreak crop diseases and pests, as well as the latest research, regulations, and quality control measures for pesticides and fertilizers, is important to farmers. Rural smallholder farmers in Tanzania have traditionally relied on government agricultural officers who visit them in their villages to provide this crop protection information. However, these officers are few and cannot reach all the farmers on time. This means that farmers fail to make critical farming decisions on time, which can lead to low crop productivity. In this study, we aim to provide farmers with reliable and instant crop protection information by developing a system based on the Short Message Service (SMS) and the Web. This system automatically replies to farmers’ requests for the latest crop protection information in the Swahili language through SMS on a mobile phone or a Web system. The findings reveal that our proposed system can provide farmers with crop protection information at lower cost (500 times cheaper) than the existing Tigo Kilimo system. Furthermore, our proposed system’s deep learning model is effective in understanding and processing Swahili natural language SMS queries for crop protection information with an accuracy of 96.43%. This crop protection information will help farmers make better critical farming decisions on time and improve crop productivity.
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Performance Evaluation of Blockchain Based Agricultural Input Voucher System
Tende, Isakwisa Gaddy; Aburada, Kentaro; Yamaba, Hisaaki; Katayama, Tetsuro; Okazaki, Naonobu
10th IEEE Global Conference on Consumer Electronics, GCCE 2021 637 - 638 2021年10月
掲載種別：研究論文（学術雑誌）
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省電力長距離通信を利用した津波災害時の避難支援システムの研究
本田 佳鈴, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 50 ) 199 - 211 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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表面筋電位による個人認証システムへの深層学習適用の試み
山場 久昭, 白石 堅哉, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 50 ) 193 - 197 2021年9月
担当区分：筆頭著者 記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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A Proposal of CAPTCHA Using the Combination of Latin and Jawi Script
Hisaaki YAMABA, Ahmad Saiful Aqmal Bin Ahmad Sohaimi, Kentaro ABURADA, Naonobu OKAZAKI
宮崎大学工学部紀要 ( 50 ) 119 - 123 2021年9月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（大学，研究機関等紀要）
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モバイル端末向けの動的 CAPTCHA の改良
本田 佳鈴, 椎谷 茜音, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 50 ) 187 - 191 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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音声入力を用いた農作業記録管理システムの開発
竹口 真理亜, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 50 ) 175 - 186 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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ブロックチェーン技術とプロキシ再暗号を用いた医療データ管理システムに関する研究
池田 良磨, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 50 ) 161 - 174 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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CNN によるマルウェア分類を改善するための GAN を用いたデータ拡張
川畑 魁星, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 50 ) 155 - 159 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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スマートフォンの加速度センサを用いたバリアフリー情報の作成
竹口 真理亜, 星崎 大典, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 50 ) 149 - 153 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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感染症拡大リスクの地理的分布の評価に関する研究 —新型コロナウィルス感染症の感染データの利用—
古井田 健太郎, 小酒井 雄也, 高塚 佳代子, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 50 ) 143 - 147 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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プロジェクト・スケジュールの品質特性の数値化に関する研究
池田 良磨, 今村 和樹, 高塚 佳代子, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 50 ) 137 - 141 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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IoT マルウェア検知精度向上のための GridSearchCV による OCSVM のパラメータ最適化
村中 弘樹, 後藤 修斗, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 50 ) 125 - 129 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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侵入検知システムの検知精度向上のための敵対的サンプルによるデータ拡張法の検討
川畑 魁星, 金丸 和樹, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 50 ) 131 - 135 2021年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Proposal of Jawi CAPTCHA Using Digraphia Feature of the Malay Language 査読あり
Yamaba, Hisaaki, Sohaimi, Ahmad Saiful Aqmal Bin Ahmad, Usuzaki, Shotaro, Aburada, Kentaro, Mukunoki, Masayukia, Park, Mirangb, Okazaki, Naonobua
16th International Workshop on Security, IWSEC 2021 119 - 133 2021年9月
担当区分：筆頭著者, 責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Proposal and evaluation for color constancy CAPTCHA 査読あり
Usuzaki S., Aburada K., Yamaba H., Katayama T., Mukunoki M., Park M., Okazaki N.
Artificial Life and Robotics 26 ( 3 ) 291 - 296 2021年8月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Artificial Life and Robotics
CAPTCHAs are technologies that distinguish humans and bot to prevent illegal access. Unfortunately, current CAPTCHAs, even the latest Google reCAPTCHA, have already broken with high accuracy. Although the devices, including emphasizing the distortion of the text and adding noise to the image, improve the machine resistance, they may decrease the accessibility of the web page. The purpose of this study is to propose a new CAPTCHA that can decrease the machine resistance while keeping usability. To achieve this purpose, we focused on color constancy. Color constancy is a human’s characteristic that enables humans to recognize the original color of the object by ignoring the effects of illumination light. Color constancy has not been fully reproduced by the program yet. We proposed color constancy CAPTCHA that the user is required to answer an original color of the object in a specified area on the CAPTCHA image with a color filter. In this paper, we created a prototype of CAPTCHA, applied two kinds of color filters, and then evaluated each case for the human success rate, machine success rate, and usability.
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Measuring test suite reusability based on the usage frequency and coverage of reused test cases 査読あり
Saputra M.C., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics, Networking and Artificial Life 8 ( 1 ) 24 - 28 2021年6月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
Test suite reusability measurement is important to obtain the value of reusability as the degree of effectiveness of reused test suite. The measurement in this experiment considers not only the frequency of the successful test suite to examine different objects but also the code coverage as the criteria of a good test suite. The combination of the frequency and code coverage in the measurement reports the current condition of test suite reusability. The research confirms the test suite reusability measurement provides useful information to know the degree of effectiveness of reused test suite, especially in regression testing and automated testing.
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Measuring redundancy score for test suite evaluation by using test cases matching approach 査読あり
Saputra M.C., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics, Networking and Artificial Life 8 ( 1 ) 1 - 5 2021年6月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
Evaluating a test suite that contains redundant test cases is necessary to reduce the cost of testing. The redundant test cases exist when both of the two test cases are executed the same lines of code. This research evaluates the test suite by identifying redundant test cases. Exact match approach is used to investigate the redundant test cases in the test suite. The redundancy score is defined by redundancy formula which is calculated by dividing the number of redundant test cases by numbers of test cases in a test suite. The experiment uses two Java programs. The redundancy scores of the two test suites from each program are 0.37 and 0.67, respectively. It means 37% and 67% redundant test cases are included in the test suites. The redundancy score provides useful information to improve the efficiency of software testing, especially in testing other programs by reusing the same test suite such as regression testing and automated testing.
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Development and Evaluation of Swahili Text Based CAPTCHA 査読あり
Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech 2021) 297 - 301 2021年3月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Utilizing the similarity meaning of label in class cohesion calculation 査読あり
Priyambadha B., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics, Networking and Artificial Life 7 ( 4 ) 270 - 274 2021年3月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
The cohesion is one of the design quality indicators in software engineering. The measurement of the value of cohesion is done by looking at the correlation between attributes and methods that are in a class. In Direct Distance Design Class Cohesion (D C ) metrics, attributes, and methods are assumed to have a good correlation if they have a similar type. But, the similarity of type parameters and attributes do not always indicate that these attributes are managed (correlated) in the method. This study is trying to gain information that can enhance the degree of certainty of a correlation between the methods and attributes. Relatedness between them has been seen from closeness the meaning of the name tag attribute, method, and parameters. The experimental results declared an increase in the value of cohesion produced in line with the similarity of meaning. 3 2
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Test Suite Reusability Measurement Based on Uses Frequently and Coverage of Reused Test Cases
Chandra Saputra Mochamad, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
人工生命とロボットに関する国際会議予稿集 26 344 - 347 2021年1月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社ALife Robotics
Reusability of a test suite is one of important factors to decrease the cost in software testing. This research defines and measures the test suite reusability score expressed with the degree of reusability of the test suite. It is calculated by considering both frequency and code coverage of successful reused test cases in the test suite. Test suite reusability measurement provides useful information to improve the efficiency of software testing, especially in regression testing and automated testing.
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Method for detecting eye misalignment based on movement near the center of the pupil
Noriyuki Uchida, Kayoko Takatuka, Hisaaki Yamaba, Masayuki Mukunoki, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB 2021) 165 - 169 2021年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Test Suite Reusability Measurement Based on Frequency and Coverage of Reused Test Cases
Mochamad Chandra Saputra, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB 2021) 344 - 347 2021年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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The Seven Information Features of Class for Blob and Feature Envy Smell Detection in a Class Diagram
Bayu Priyambadha, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB 2021) 348 - 351 2021年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Improvement of RETUSS to Ensure Traceability between Sequence Diagram in UML and Java Source Code in Real Time
Kaoru Arima, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB 2021) 352 - 355 2021年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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An attempt at an introduction of deep learning for a user authentication system using s-EMG
Hisaaki Yamaba, Kenya Shiraishi, Shotaro Usuzaki, Kayoko Takatsuka, Kentaro Aburada, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. of the 26th International Symposium on Artificial Life and Robotics 2021年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Blockchain-based vote-type unknown malware detection method using a characteristic of anti-virus vendors’ voting
Hiroki Muranaka, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. of the 26th International Symposium on Artificial Life and Robotics 2021年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Development and evaluation of blockchain based agricultural input voucher system
Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Proc. of the 26th International Symposium on Artificial Life and Robotics 2021年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Test suite reusability measurement based on uses frequently and coverage of reused test cases
Saputra M.C., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 2021 344 - 347 2021年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
Reusability of a test suite is one of important factors to decrease the cost in software testing. This research defines and measures the test suite reusability score expressed with the degree of reusability of the test suite. It is calculated by considering both frequency and code coverage of successful reused test cases in the test suite. Test suite reusability measurement provides useful information to improve the efficiency of software testing, especially in regression testing and automated testing.
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Performance Evaluation of Blockchain Based Agricultural Input Voucher System
Tende I.G., Aburada K., Yamaba H., Katayama T., Okazaki N.
2021 IEEE 10th Global Conference on Consumer Electronics, GCCE 2021 637 - 638 2021年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：2021 IEEE 10th Global Conference on Consumer Electronics, GCCE 2021
Large portion of rural small-scale farmers in Tanzania can't afford to buy quality agricultural inputs (fertilizers and seeds), therefore the government of Tanzania provides these farmers with paper-based subsidy vouchers which allow them to buy the agricultural inputs at only half price. However, challenges like misuse of the vouchers by some government officials (stealing and favoritism in vouchers' allocation) and lack of trust (difficulty of verifying vouchers' authenticity) have resulted into low crop productivity for the farmers and loss of government funds. In our previous work, we developed agricultural input voucher system which stores and allocates digital subsidy vouchers to farmers in the Hyperledger Fabric blockchain network and we evaluated its performance based on transaction throughput and latency metrics which are important to farmers, who access the system through Short Message Service (SMS) in their mobile phones. The blockchain network's features such as hashing and digital signature prevent misuse and ensure trust of the digital vouchers. In this paper, we evaluate performance of the developed blockchain network based on resources (CPU and memory) consumption metrics which are important in planning resources during system deployment. The evaluation findings reveal that, Raft consensus protocol consumes resources more efficiently than Kafka consensus protocol.
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Development of a system to detect eye position abnormality based on eye-tracking
Uchida N., Takatuka K., Yamaba H., Mukunoki M., Okazaki N.
Journal of Robotics, Networking and Artificial Life 8 ( 3 ) 205 - 210 2021年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
In previous research, we developed a method to automate the conventional evaluation of eye misalignment (cover test) and distinguish misaligned eyes from their movements. However, this method had the problem that vertical eye movements were affected by the eyelids and eyelashes, and could not be completely detected. To solve this problem, we have developed another method to recognize abnormalities by observing only the movement near the center of the pupil.
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Identification of Redundant Test Cases by Using Similarity Measurement Method for Test Suite Evaluation 査読あり
Saputra Mochamad Chandra, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 1 ( 4 ) 187 - 192 2021年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
Evaluating the test suite that contains redundant test cases is necessary to ensure the efficiency of the testing and reducing the cost of testing. The principle of redundant test cases on this research is any test cases on a similar path executed with a similar high value of normalized Euclidean distance. The first, the similarity calculated between the test cases and path coverage uses Euclidean distance. The value of the Euclidean distance on the test case with the lowest value of distance indicating highly similar and possibly executing similar lines of code. The normalized Euclidean distance is using to normalize the value from Euclidean distance result. The experiment uses two java programs. Each redundancy score is 0.37 and 0.67, respectively. It means 37% and 67% of the test cases should be avoided because there are inefficiency test cases on the test suite. The research confirms redundant test cases can be identified by Euclidean distance and normalized Euclidean distance to evaluate the test suite.
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Identification of Redundant Test Cases by Using Similarity Measurement Method for Test Suite Evaluation
Saputra Mochamad Chandra, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 1 ( 4 ) 187 - 192 2021年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
Evaluating the test suite that contains redundant test cases is necessary to ensure the efficiency of the testing and reducing the cost of testing. The principle of redundant test cases on this research is any test cases on a similar path executed with a similar high value of normalized Euclidean distance. The first, the similarity calculated between the test cases and path coverage uses Euclidean distance. The value of the Euclidean distance on the test case with the lowest value of distance indicating highly similar and possibly executing similar lines of code. The normalized Euclidean distance is using to normalize the value from Euclidean distance result. The experiment uses two java programs. Each redundancy score is 0.37 and 0.67, respectively. It means 37% and 67% of the test cases should be avoided because there are inefficiency test cases on the test suite. The research confirms redundant test cases can be identified by Euclidean distance and normalized Euclidean distance to evaluate the test suite.
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Extension of the Function to Ensure Real-time Traceability between UML Sequence Diagram and Java Source Code on RETUSS
Arima Kaoru, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 2 ( 1 ) 37 - 41 2021年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
Ensuring traceability of software deliverables is one of the methods to ensure software quality. RETUSS (Real-time Ensure Traceability between UML and Source-code System) is a tool that saves labor and time, and eliminates mistakes by human handling in ensuring traceability between UML and source code. However, RETUSS is not useful due to its limited scope of application. This paper improves the usefulness of RETUSS by extending the function to ensure real-time traceability between UML sequence diagrams and Java source code on RETUSS.
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Extension of the Function to Ensure Real-time Traceability between UML Sequence Diagram and Java Source Code on RETUSS 査読あり
Arima Kaoru, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 2 ( 1 ) 37 - 41 2021年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：株式会社 ALife Robotics
Ensuring traceability of software deliverables is one of the methods to ensure software quality. RETUSS (Real-time Ensure Traceability between UML and Source-code System) is a tool that saves labor and time, and eliminates mistakes by human handling in ensuring traceability between UML and source code. However, RETUSS is not useful due to its limited scope of application. This paper improves the usefulness of RETUSS by extending the function to ensure real-time traceability between UML sequence diagrams and Java source code on RETUSS.
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Katayama T., Shigyo Y., Kita Y., Yamaba H., Aburada K., Okazaki N.
Journal of Robotics, Networking and Artificial Life 7 ( 3 ) 165 - 169 2020年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Robotics, Networking and Artificial Life
The natural language includes ambiguous expressions. Vienna Development Method (VDM) is one of methodology on the formal methods to write the specification without ambiguity. Because VDM++ is written by strict grammar, it is difficult to write a VDM++ specification. This research attempts to generate a VDM++ specification automatically from a natural language specification by machine learning. To generate a VDM++ specification, it is necessary to extract words that consist of predicate corresponding to the function and nouns corresponding to variable from the natural language specification. This paper proposes an approach to generate a VDM++ specification based on its grammar from the classified word list. Identifiers are generated from the classified word list, and then the VDM++ specification can be generated by converting them into VDM++ grammar.
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FMD-VS: A virtual sensor to index FMD virus scattering 査読あり
Takatsuka K., Sekiguchi S., Yamaba H., Aburada K., Mukunoki M., Okazaki N.
PLoS ONE 15 ( 9 September ) 2020年9月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：PLoS ONE
Foot-and-mouth disease (FMD) models—analytical models for tracking and analyzing FMD outbreaks—are known as dominant tools for examining the spread of the disease under various conditions and assessing the effectiveness of countermeasures. There has been some remarkable progress in modeling research since the UK epidemic in 2001. Several modeling methods have been introduced, developed, and are still growing. However, in 2010 when a FMD outbreak occurred in the Miyazaki prefecture, a crucial problem reported: Once a regional FMD outbreak occurs, municipal officials in the region must make various day-today decisions throughout this period of vulnerability. The deliverables of FMD modeling research in its current state appear insufficient to support the daily judgments required in such cases. FMD model can be an efficient support tool for prevention decisions. It requires being conversant with modeling and its preconditions. Therefore, most municipal officials with no knowledge or experience found full use of the model difficult. Given this limitation, the authors consider methods and systems to support users of FMD models who must make real-time epidemic-related judgments in the infected areas. We propose a virtual sensor, designated “FMD-VS,” to index FMD virus scattering in conditions where there is once a notion of FMD; and (2) shows how we apply the developed FMD-VS technique during an outbreak. In (1), we show our approach to constructing FMD-VS based on the existing FMD model and offer an analysis and evaluation method to assess its performance. We again present the results produced when the technique applied to 2010 infection data from the Miyazaki Prefecture. For (2), we outline the concept of a method that supports the prevention judgment of municipal officials and show how to use FMD-VS.
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視線の特徴量を用いたあみだくじ型視線認証
宮崎 翔吾, 國房 弘夢, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 49 ) 129 - 133 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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青島地区における避難者の歩行速度を考慮した避難所決定手法の提案
本田 佳鈴, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 49 ) 295 - 299 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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ブロックチェーンベースの協調型マルウェア検知システムの研究
藤 竜成, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 49 ) 275 - 294 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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雨天時におけるヒヤリハットの分析
池田 良磨, 土田 靖高, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 49 ) 269 - 273 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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n-gram解析とOne-Class SVMを用いた IoT ボットネットワークの検知手法の提案
池田 良磨, 森 雅実, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 49 ) 263 - 267 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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プロジェクト・スケジュールの遅延リスクの分析手法
宮崎 翔吾, 田辺 祥悟, 高塚 佳代子, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 49 ) 257 - 261 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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色の恒常性を利用した CAPTCHA の ユーザビリティと機械攻撃耐性向上のための検討
臼崎 翔太郎, 砂本 佑紀, 岡崎 直宣, 山場 久昭, 油田 健太郎
宮崎大学工学部紀要 ( 49 ) 251 - 255 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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表面筋電位を用いた個人認証のための指文字ベースジェスチャの評価
山場 久昭, 長友 勇樹, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 49 ) 233 - 237 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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環境音を利用したマウスによる音声型 CAPTCHA の提案
本田 佳鈴, 岩村 隆晴, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 49 ) 171 - 175 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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メタデータを用いたリパッケージアプリの検出手法「CloneSpot」の改良
藤 竜成, 五味 健一郎, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 49 ) 165 - 169 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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モバイル端末向け CAPTCHA のハフ変換を用いたボットへの耐性評価
竹口 真理亜, 梁井 孝治, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 49 ) 159 - 163 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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プロジェクトのリスクマネジメントのためのサポートシステムに関する研究
宮崎 翔吾, 高塚 佳代子, 油田 健太郎, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 49 ) 135 - 157 2020年9月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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On a user authentication method to realise an authentication system using s-EMG 査読あり
Yamaba H., Usuzaki S., Takatsuka K., Aburada K., Katayama T., Park M., Okazaki N.
International Journal of Grid and Utility Computing 11 ( 5 ) 725 - 734 2020年8月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：International Journal of Grid and Utility Computing
To prevent shoulder-surfing attacks, we proposed a user authentication method using surface electromyogram (s-EMG) signals, which can be used to identify who generated the signals and which gestures were made. Our method uses a technique called 'pass-gesture', which refers to a series of hand gestures, to achieve s-EMG-based authentication. However, it is necessary to introduce computer programs that can recognise gestures from the s-EMG signals. In this paper, we propose two methods that can be used to compare s-EMG signals and determine whether they were made by the same gesture. One uses support vector machines (SVMs), and the other uses dynamic time warping. We also introduced an appropriate method for selecting the validation data used to train SVMs using correlation coefficients and cross-correlation functions. A series of experiments was carried out to confirm the performance of those proposed methods, and the effectiveness of the two methods was confirmed.
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主観的輪郭を用いた回転3Dテキスト型CAPTCHAの提案 査読あり
臼崎翔太郎, 油田健太郎, 山場久昭, 片山徹郎, 椋木雅之, 朴美娘, 岡崎直宣
電子情報通信学会論文誌 J103-B ( 8 ) 332 - 343 2020年8月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Evaluation of Yubimoji Based Gestures for Realizing User Authentication Method Using s-EMG 査読あり
Yamaba H., Nagatomo Y., Usuzaki S., Takatsuka K., Aburada K., Katayama T., Park M., Okazaki N.
Advances in Intelligent Systems and Computing 1150 AISC 834 - 844 2020年3月
記述言語：日本語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Advances in Intelligent Systems and Computing
© 2020, Springer Nature Switzerland AG. At the present time, since mobile devices such as tablet-type PCs and smart phones have penetrated deeply into our daily lives, an authentication method that prevents shoulder surfing attacks comes to be important. We are investigating a new user authentication method for mobile devices that uses surface electromyogram (s-EMG) signals, not screen touching. The s-EMG signals, which are generated by the electrical activity of muscle fibers during contraction, can be detected over the skin surface, and muscle movement can be differentiated by analyzing the s-EMG signals. Taking advantage of the characteristics, we proposed a method that uses a list of gestures as a password in the previous study. In order to realize this method, we have to prepare a sufficient number of gestures that are used to compose passwords. In this paper, we adopted fingerspelling as candidates of such gestures. We introduced manual kana of the Japanese Sign Language syllabary and selected the candidate gestures based on them. Their performances were evaluated by constructing their identifier using support vector machines.
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Test Cases Redundant Elimination on Code Coverage Uses Distance and Correlation Measurement Method
Mochamad Chandra Saputra, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2020 Int’l Conf. on Artificial Life and Robotics (ICAROB 2020) 755 - 758 2020年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Identification of Manual Alphabets Based Gestures Using s-EMG for Realizing User Authentication 査読あり
Yamaba H., Usuzaki S., Takatsuka K., Aburada K., Katayama T., Park M., Okazaki N.
Lecture Notes on Data Engineering and Communications Technologies 47 323 - 333 2020年1月
記述言語：日本語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes on Data Engineering and Communications Technologies
© 2020, Springer Nature Switzerland AG. At the present time, since mobile devices such as tablet-type PCs and smart phones have penetrated deeply into our daily lives, an authentication method that prevents shoulder surfing attacks comes to be important. We are investigating a new user authentication method for mobile devices that uses surface electromyogram (s-EMG) signals, not screen touching. The s-EMG signals, which are generated by the electrical activity of muscle fibers during contraction, can be detected over the skin surface, and muscle movement can be differentiated by analyzing the s-EMG signals. Taking advantage of the characteristics, we proposed a method that uses a list of gestures as a password in the previous study. In order to realize this method, we have to prepare a sufficient number of gestures that are used to compose passwords. In this paper, we adopted fingerspelling as candidates of such gestures. We introduced manual kana of the Japanese Sign Language syllabary and compared the identification performance of some candidate sets of feature values with adopting support vector machines.
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Bayu Priyambadha, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2020 Int’l Conf. on Artificial Life and Robotics (ICAROB 2020) 2020 763 - 766 2020年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
The natural language includes ambiguous expressions. VDM is one of methodology on the formal methods to write the specification without ambiguity. Because VDM++ is written by strict grammar, it is difficult to write a VDM++ specification. This research attempts to generate a VDM++ specification automatically from a natural language specification by machine learning. To generate a VDM++ specification, it is necessary to extract words which consist of predicate corresponding to the function and nouns corresponding to variable from the natural language specification. This paper proposes an approach to generate a VDM++ specification from the extracted words list. Identifiers are generated from the extracted words list, and then the VDM++ specification can be generated by converting them into VDM++ grammar.
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The Measurement of Class Cohesion using Semantic Approach
Bayu Priyambadha, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2020 Int’l Conf. on Artificial Life and Robotics (ICAROB 2020) 2020 759 - 762 2020年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of International Conference on Artificial Life and Robotics
The cohesion is one of the design quality indicators that can be measured by focusing on the correlation between elements inner the class. In Direct Distance Design Class Cohesion (D3C2) metrics, elements are assumed correlated if they have a similar type. In this research, the correlation between elements' inner class is not only based on type similarity but also on the meaning of the element’s name. The results confirm that the value of cohesion increases in line with the similarity of meaning.
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Application of Pairwise Testing into BWDM which is a Test Case Generation Tool for the VDM++ Specification 査読あり
T. Katayama, F. Hirakoba, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Journal of Robotics, Networks and Artificial Life 6 ( 3 ) 143 - 147 2019年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Implementation of CAPTCHA suitable for mobile devices 査読あり
K. Aburada, S. Usuzaki, H. Yamaba, T. Katayama, M. Mukunoki, M. Park, and N. Okazaki
IEICE Communications Express 8 ( 12 ) 601 - 605 2019年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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An evaluation of the interactive video CAPTCHA method against automated attack 査読あり
K. Aburada, S. Usuzaki, H. Yamaba, T. Katayama, M. Mukunoki, M. Park, and N. Okazaki
IEICE Communications Express 8 ( 12 ) 453 - 457 2019年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Implementation of Tamias to Check Production Rules for Parsing Expression Grammar 査読あり
T. Katayama, T. Miyaji, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Journal of Robotics, Networks and Artificial Life 6 ( 2 ) 123 - 127 2019年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Evaluation of manual alphabets based gestures for a user authentication method using s-emg 査読あり
Yamaba H., Usuzaki S., Takatsuka K., Aburada K., Katayama T., Park M., Okazaki N.
Advances in Intelligent Systems and Computing 1036 570 - 580 2019年8月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Advances in Intelligent Systems and Computing
© Springer Nature Switzerland AG 2020. At the present time, since mobile devices such as tablet-type PCs and smart phones have widely penetrated into our daily lives, an authentication method that prevents shoulder surfing attacks comes to be important. We are investigating a new user authentication method for mobile devices that uses surface electromyogram (s-EMG) signals, not screen touching. The s-EMG signals, which are generated by the electrical activity of muscle fibers during contraction, can be detected over the skin surface, and muscle movement can be differentiated by analyzing the s-EMG signals. Taking advantage of the characteristics, we proposed a method that uses a list of gestures as a password in the previous study. In order to realize this method, we have to prepare a sufficient number of gestures that are used to compose passwords. In this paper, we adopted fingerspelling as candidates of such gestures. We measured s-EMG signals of manual kana of The Japanese Sign Language syllabary and evaluated their potential as the important element of the user authentication method.
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Blockchain-based malware detection method using shared signatures of suspected malware files 査読あり
Fuji R., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Shiratori N., Okazaki N.
Advances in Intelligent Systems and Computing 1036 305 - 316 2019年8月
記述言語：日本語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Advances in Intelligent Systems and Computing
© Springer Nature Switzerland AG 2020. Although rapid malware detection is very important, the detection is difficult due to the increase of new malware. In recent years, blockchain technology has attracted the attention of many people due to its four main characteristics of decentralization, persistency, anonymity, and auditability. In this paper, we propose a blockchain-based malware detection method that uses shared signatures of suspected malware files. The proposed method can share the signatures of suspected files between users, allowing them to rapidly respond to increasing malware threats. Further, it can improve the malware detection by utilizing signatures on the blockchain. In the evaluation experiment, we perform a more real simulation compared with our previous work to evaluate the detection accuracy. Compared with heuristic methods or behavior-based methods only, the proposed system which uses these methods plus signature-based method using shared signatures on the blockchain improved the false negative rate and the false positive rate.
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モバイル端末向けの動的 CAPTCHA の検討と追跡技術を用いたボット耐性の検証
藤 竜成, 水田 陸, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 257 - 261 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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人間の視覚補完能力を用いた文字列 CAPTCHA の提案 ―側面形状からの立体文字の推定―
藤 竜成, 星野 理彦, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 251 - 255 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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スケジュール・ネットワーク全体に分散する余裕の包括的評価に関する研究
藤 竜成, 高橋 尚己, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 245 - 249 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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マウスを用いた単純操作の音声型 CAPTCHA の提案
藤 竜成, 坂本 竜也, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 239 - 243 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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機器特性を考慮したあみだくじ視線認証の提案
藤 竜成, 黒野 聖, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 235 - 238 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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瞳孔位置追跡に基づく眼位異常検出システムの開発
藤 竜成, 川上 真矢, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 229 - 233 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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色の恒常性を利用した colorCAPTCHA の提案
藤 竜成, 川上 翔平, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 223 - 227 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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表面筋電位による個人認証のための指文字ベースのジェスチャの検討
藤 竜成, 猪谷 眞平, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 217 - 221 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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スケッチデータ構造を用いた低速 DDoS 攻撃検出の検討
藤 竜成, 井 康成, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 213 - 216 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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プロジェクト・スケジュールの遅延リスク耐性評価方法の提案
富田 旋, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 195 - 212 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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ランダム性を持ったあみだくじ型視線認証の提案
宮崎 翔吾, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 189 - 193 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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クライアントの HTTP リクエスト送信動作に着目したボット検知手法
藤 竜成, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 183 - 187 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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リアルタイム性を考慮したエントロピーベース DDoS 攻撃検知手法の提案
臼崎 翔太郎, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 48 ) 167 - 181 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Nagatomo M., Aburada K., Yamaba H., Okazaki N., Park M.
Advances in Intelligent Systems and Computing 927 683 - 692 2019年3月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Advances in Intelligent Systems and Computing
© 2019, Springer Nature Switzerland AG. Currently, IoT devices often use wireless technologies to communicate with each other. An example is ad-hoc device pairing such as wireless distribution of meeting materials from a PC to mobile device. The problem in this case is spoofing by an impersonator. In order to solve this problem, we proposed secure device pairing method using similarity between displacement data of a marker displayed on devices and acceleration data obtained from devices. We performed experiments to confirm similarity and whether impersonator can pair with the server. As a result, we found that similarity was low and unstable. Therefore, in this paper, we propose an extended method that marker changes at an interval. These sequence of markers displayed on the device is used to recognize the device by a camera in addition to calculation of the similarity. We performed 3 experiments to confirm the similarity displacement data and examined whether an eavesdropper outside the camera range can perform pairing. Also, we performed pairing of some device together. As a result, average similarity was higher than that of previous method and pairing of three devices succeeded at rate of about 70%.
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Introduction of Fingerspelling for Realizing a User Authentication Method Using s-EMG
Yamaba H., Inotani S., Usuzaki S., Takatsuka K., Aburada K., Katayama T., Park M., Okazaki N.
Advances in Intelligent Systems and Computing 927 693 - 701 2019年3月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Advances in Intelligent Systems and Computing
© 2019, Springer Nature Switzerland AG. At the present time, mobile devices such as tablet-type PCs and smart phones have widely penetrated into our daily lives. Therefore, an authentication method that prevents shoulder surfing is needed. We are investigating a new user authentication method for mobile devices that uses surface electromyogram (s-EMG) signals, not screen touching. The s-EMG signals, which are detected over the skin surface, are generated by the electrical activity of muscle fibers during contraction. Muscle movement can be differentiated by analyzing the s-EMG. Taking advantage of the characteristics, we proposed a method that uses a list of gestures as a password in the previous study. In order to realize this method, we have to prepare many gestures that are used to compose passwords. In this paper, we adopted fingerspelling as candidates of such gestures. We measured s-EMG signals of manual kana of The Japanese Sign Language syllabary and examined their ability for the use of passwords of the authentication method.
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Interactive Video CAPTCHA for Better Resistance to Automated Attack 査読あり
Usuzaki S., Aburada K., Yamaba H., Katayama T., Mukunoki M., Park M., Okazaki N.
2018 11th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2018 1 - 2 2019年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：2018 11th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2018
© 2018 IPSJ. A 'Completely Automated Public Turing Test to Tell Computers and Humans Apart' (CAPTCHA) widely used online services so that prevents bots from automatic getting a large of accounts. Interactive video type CAPTCHAs that attempt to detect this attack by using delay time due to communication relays have been proposed. However, these approaches remain insufficiently resistant to bots. We propose a CAPTCHA that combines resistant to automated and relay attacks. In our CAPTCHA, the users recognize a moving object (target object) from among a number of randomly appearing decoy objects and tracks the target with mouse cursor. The users pass the test when they were able to track the target for a certain time. Since the target object moves quickly, the delay makes it difficult for a remote solver to break the CAPTCHA during a relay attack. It is also difficult for a bot to track the target using image processing because it has same looks of the decoys. We evaluated our CAPTCHA's resistance to relay and automated attacks. Our results show that, if our CAPTHCA's parameters are set suitable value, a relay attack cannot be established economically and false acceptance rate with bot could be reduced to 0.01% without affecting human success rate.
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Implementation of an Arduino Simulator to Support Circuit Design
Tatsumi Nishida, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2019 Int’l Conf. on Artificial Life and Robotics (ICAROB 2019) 173 - 176 2019年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Tamias: a Syntax File Checker for Parsing Expression Grammar
Toshihiro Miyaji, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2019 Int’l Conf. on Artificial Life and Robotics (ICAROB 2019) 169 - 172 2019年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Development of Library Fescue Extracting Elements of Attributes and Operations of Class Diagram in UML
Keisuke Mori, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2019 Int’l Conf. on Artificial Life and Robotics (ICAROB 2019) 165 - 168 2019年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Application of Pairwise Testing to Test Cases by Boundary Value Analysis in BWDM
Futa Hirakoba, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2019 Int’l Conf. on Artificial Life and Robotics (ICAROB 2019) 161 - 164 2019年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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HMD-based Cover Test System for the Diagnosis of Ocular Malalignment 査読あり
Noriyuki Uchida, Kayoko Takatuka, Atsusi Nakazawa, Masayuki Mukunoki, Hisaaki Yamaba, Naonobu Okazaki
Journal of Artificial Life and Robotics, Springer 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Implementation of Arduino Simulator ADVIS Visualizing the Value of Voltage on the Circuit 査読あり
Tetsuro Katayama, Tatsumi Nishida, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Use of access characteristics to distinguish legitimate user traffic from DDoS attack traffic
Aburada K., Arikawa Y., Usuzaki S., Yamaba H., Katayama T., Park M., Okazaki N.
Artificial Life and Robotics 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Artificial Life and Robotics
© 2019, International Society of Artificial Life and Robotics (ISAROB). Distributed denial of service attacks are a serious threat in the current information society, where the Internet plays an important role as infrastructure. We have been studying ways to mitigate these attacks using a method that distinguishes between legitimate users and attacks. Our previous method was not sufficient because it only analyzed access logs after the attack. In this study, we propose a new method that can distinguish between legitimate users and attacks while the services are running. When the IDS detects an attack, a quarantine server distinguishes legitimate users using access characteristics. The access characteristics are: (1) user follows links, (2) sender accessed a popular page, and (3) the sender’s current average transmission interval. Our experiments confirmed that the proposed method can distinguish between legitimate users and attacks.
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Investigation on sharing signatures of suspected malware files using blockchain technology 査読あり
Fuji R., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Shiratori N., Okazaki N.
Lecture Notes in Engineering and Computer Science 2239 94 - 99 2019年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes in Engineering and Computer Science
© 2019 Turkiye Klinikleri Journal of Medical Sciences. All rights reserved. In recent years, the amount of new malware has been rapidly increasing. Because malware has an adverse effect on the Internet, upon which modern society is increasingly dependent, its detection is very important. In addition, blockchain technology has attracted the attention of many people in recent years due to its four main characteristics of decentralization, persistency, anonymity, and auditability. In this paper, we propose a system for sharing the signatures of suspected malware files using blockchain technology. The proposed system can share the signatures of suspected files between users, allowing them to rapidly respond to increasing malware threats. Further, it improves the accuracy of detection and removal of malware by utilizing signatures recorded by the blockchain. In the evaluation experiment, we created a prototype of the proposed system and investigated its effect on the accuracy of detection and removal of malware. Compared with heuristic methods or behavior-based methods only, the proposed system which uses these methods plus signature-based method using shared signatures on the blockchain improved the false negative rate by about 4% and the false positive rate by about 2.5%.
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CHAMSIN: CaptcHA by caMouflaged StrINg 査読あり
Mukunoki Masayuki, Yamaba Hisaaki, Usuzaki Shotaro, Aburada Kentaro, Katayama Tetsuro, Park Mirang, Okazaki Naonobu
IEICE Communications Express 8 ( 3 ) 55 - 60 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：一般社団法人 電子情報通信学会
We propose a new CAPTCHA scheme that uses random dot patterns (RDPs) to prevent highly-developed bots attacks. Human beings can recognize a moving figure filled by a RDP from a background that is filled by another RDP; however, it is impossible to find such figures when they are stationary. Since image recognition by bots is usually carried out frame by frame, it is hard for bots to recognize such moving figures. The proposed CAPTCHA scheme exploits this characteristic. Several experiments were carried out to confirm that the proposed CAPTCHA scheme is usable enough and has enough resistance against bot attacks.
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A Proposal of New Reading Text CAPTCHA using Random Dot Patterns 査読あり
Yamaba H., Usuzaki S., Aburada K., Mukunoki M., Park M., Okazaki N.
Proceedings - 2018 6th International Symposium on Computing and Networking, CANDAR 2018 207 - 212 2018年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings - 2018 6th International Symposium on Computing and Networking, CANDAR 2018
© 2018 IEEE. According to the growth of troubles caused by malicious programs called bots, CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) comes to be an important role in the current information society. CAPTCHA identifies bots from legitimate human users by requiring some questions that are easy for humans to solve but difficult for bots. However, the progress of computing technology such as Optical Character Recognition (OCR) function. bots come to be able to solve present CAPTCHAs. In order to outcome such troublesome bots, more sophisticated CAPTCHA that requires the high cognitive ability of human beings is desired. In this paper, we propose a new CAPTCHA scheme that uses random dot patterns. Human beings can recognize a moving figure filled by a random dot pattern from a background that is filled by another random dot pattern; however, they lose the figure in the background when the figure pauses. Since image recognition by computer programs is usually carried out frame by frame, it is hard for bots to recognize such a moving figure filled by a random dot pattern from another random dot pattern background. The proposed CAPTCHA scheme exploits this characteristic of random dot patterns. This CAPTCHA requires users to answer a text filled by a random dot pattern that is moving on a background also filled by another random dot pattern. Several experiments were carried out to confirm that the proposed CAPTCHA scheme has enough resistance against bot attacks using representative image recognition methods. Results of the experiments showed that the image recognition methods cannot find out the answer text. Other experiments were also carried out to evaluate the usability of the proposed CAPTCHA scheme. The system usability scheme was adopted in the experiments. The obtained score was 89 that means this CAPTCHA scheme has high usability. These results showed that the CAPTCHA scheme is usable enough and has enough resistance against bot attacks.
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Evaluation of User Identification Methods for Realizing an Authentication System Using s-EMG
Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Mirang Park, and Naonobu Okazaki
Ad- vances in Network-Based Information Systems, Lecture Notes on Data Engineering and Communications Technologies 732 - 742 2018年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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表面筋電位を用いた認証システム実装のための筋電波形の特徴量の選出
平田 木乃美, 横山 美波, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 315 - 319 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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ユーザの視線経路を用いた PIN 入力手法の提案
平田 木乃美, 山口 翔太, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 311 - 314 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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眼位異常スクリーニングのための定性的な眼位検査システムの開発
平田 木乃美, 日隈 光基, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 305 - 309 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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眼位異常のスクリーニングのための定性的な眼位検査システムに関する研究
平田 木乃美, 日隈 光基, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 291 - 303 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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口蹄疫の防疫判断をサポートするシステムの開発
平田 木乃美, 岩満 海人, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 285 - 289 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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モバイルデバイスの利用に適した CAPTCHA 方式の検討
富田 旋, 初 蕾, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 279 - 283 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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リレーアタック耐性と BOT 耐性の両立を目指したインタラクティブな動画 CAPTCHA 方式に関する研究
富田 旋, 立田 怜平, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 255 - 277 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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時間とコストの一元管理のためのプロジェクト管理システムの大規模プロジェクトへの適用に関する検討
富田 旋, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 249 - 253 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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画像認識では識別困難な指文字の筋電位による識別の検討
富田 旋, 黒木 誠, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 243 - 247 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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プロジェクトのスケジュール・ネットワークの遅延リスク耐性の評価について
富田 旋, 門川 真樹, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 237 - 241 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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表面筋電位を用いた認証システム実現のための個人識別手法の提案
黒木 聡舜, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 227 - 236 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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リアルタイムバースト検出手法による即応性を考慮した DDoS 攻撃検知手法
臼崎 翔太郎, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 221 - 225 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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青島地区における災害時の避難行動に関するシミュレーション
臼崎 翔太郎, 藤井 貴大, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 215 - 219 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Color CAPTCHAのための色妨害画像に対する色恒常性の成立度合いの検討
臼崎 翔太郎, 中原 裕介, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 211 - 214 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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トラフィック特性による正当なユーザと DDoS 攻撃の識別手法の提案
臼崎 翔太郎, 有川 佑樹, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 201 - 210 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Java プログラムのデータ遷移可視化ツール TFVIS の開発 査読あり
佐藤 拓弥、片山徹郎、喜多 義弘、山場久昭、油田健太郎、岡崎 直宣
情報処理学会論文誌 59 ( 4 ) 1137 - 1149 2018年4月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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RETUSS: Ensuring Traceability System between Class Diagram in UML and Java Source Code in Real Time 査読あり
Tetsuro Katayama, Keisuke Mori, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada and Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life 5 ( 2 ) 114 - 117 2018年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Yamaba H., Kurogi T., Aburada K., Kubota S., Katayama T., Park M., Okazaki N.
Artificial Life and Robotics 23 ( 1 ) 87 - 93 2018年3月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Artificial Life and Robotics
© 2017, ISAROB. At present, mobile devices such as tablet-type PCs and smart phones have widely penetrated into our daily lives. Therefore, an authentication method that prevents shoulder surfing is needed. We are investigating a new user authentication method for mobile devices that uses surface electromyogram (s-EMG) signals, not screen touching. The s-EMG signals, which are detected over the skin surface, are generated by the electrical activity of muscle fibers during contraction. Muscle movement can be differentiated by analyzing the s-EMG. Taking advantage of the characteristics, we proposed a method that uses a list of gestures as a password in the previous study. In this paper, we introduced support vector machines (SVM) for improvement of the method of identifying gestures. A series of experiments was carried out to evaluate the performance of the SVM based method as a gesture classifier and we also discussed its security.
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Evaluation of Index Poisoning Method in Large Scale Winny Network 査読あり
K.Aburada, Y. Kita, H.Yamaba, T.Katayama, M. Park, N.Okazak
The 6th International Conference on Emerging Internet, Data & Web Technologies 999 - 1006 2018年3月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
In recent years, P2P file-sharing networks are used all over the world. This has led to social problems such as the illegal distribution of copyrighted material and the leakage of personal information through computer viruses because P2P does not have a control function for file distribution. To address these issues, a control method called index poi- soning has been studied. However, problems such as pollution in the net- work index and a need to increment control traffic have been reported when index poisoning is applied to a P2P file-sharing network. We pro- pose a method that implements dynamic clustering to limit the range of index poisoning as a solution for these problems that also maintains the effectiveness of the control function. In this study, we implement index poisoning on the large-scale Winny network and evaluate the system performance.
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An Examination of CAPTCHA for Tolerance of Relay Attacks and Automated Attacks 査読あり
R. Tatsuda, H.Yamaba, K.Aburada, T.Katayama, M. Park, N. Shiratori, N.Okazak
The 6th International Conference on Emerging Internet, Data & Web Technologies 870 - 879 2018年3月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
CAPTCHA is a type of challenge response test used to dis- tinguish human users from malicious computer programs such as bots, and is used to protect email, blogs, and other web services from bot attacks. So far, research on enhance of CAPTCHA’s resistance to bot attacks has been proceeded to counter advanced automated attacks method. However, an attack technique known as a relay attack has been devised to circumvent CAPTCHA. In this attack, since human solves CAPTCHA, the existing measures assuming bots have no effect on this attack. We designed a new CAPTCHA scheme for relay attacks tolerance and automated attacks tolerance. In this paper, we tested the robustness of the proposed method against several types of automated attacks. We constructed an experimental environment in which a relay attack can be simulated, and designed a series of experiments to evaluate the perfor- mance of the proposed method. As a result, we found that the proposed CAPTCHA scheme offers some of level of resistance to automated attacks and relay attacks.
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A Study on a User Identification Method Using Dynamic Time Warping to Realize an Authentication System by s-EMG 査読あり
T. Kurogi, H.Yamaba, K.Aburada, T.Katayama, M. Park, N.Okazak
The 6th International Conference on Emerging Internet, Data & Web Technologies 889 - 900 2018年3月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
At the present time, mobile devices such as tablet-type PCs and smart phones have widely penetrated into our daily lives. Therefore, an authentication method that prevents shoulder surfing is needed. We are investigating a new user authentication method for mobile devices that uses surface electromyogram (s-EMG) signals, not screen touching.
The s-EMG signals, which are detected over the skin surface, are generated by the electrical activity of muscle fibers during contraction. Muscle movement can be differentiated by analyzing the s-EMG. Taking advantage of the characteristics, we proposed a method that uses a list of gestures as a password in the previous study. In this paper, we intro- duced dynamic time warping (DTW) for improvement of the method of identifying gestures. -
Prototype of a Tool to Defect Specific Comments 査読あり
S. Tanoue, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 2018年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper has developed a prototype of a tool to detect specific comments. With the prototype, you can use regular expressions, describe patterns of detected strings in a configuration file, and then detect specific comments. The prototype was applied to projects with 5,000 LOC (Lines of Code) or more. As a result, the recall rate achieved 100% and the precision rate achieved 80%. Reducing improper comments and comments detected by the prototype which express tasks remaining in the source code can improve understandability of the source code.
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Implementation of RETUSS to Ensure Traceability between Class Diagram in UML and Java Source Code in Real Time 査読あり
K. Mori, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 2018年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
Ensuring of the traceability of deliverables is one of effective methods to secure the quality of software. It can verify that the requirements are reflected in the programs. But it has two problems: taking much labor and time, and causing mistakes by human handling. This paper has implemented RETUSS (Real-time Ensure Traceability between UML and Source-code System) in order to solve the above two problems. RETUSS can ensure traceability between Class diagram in UML and Java source code in real time.
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A study on user identification method using cross-correlation and SVM to realize an authentication system by s-EMG 査読あり
T. Kurogi, H.Yamaba, K.Aburada, T.Katayama, M. Park, N.Okazak
International Symposium on Artificial Life and Robotics 462 - 467 2018年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Automated cover-uncover test system using active LCD shutter glasses 査読あり
N. Uchida, K. Takatsuka, K. Hinokuma, K. Hirata, H.Yamaba, N.Okazak
International Symposium on Artificial Life and Robotics 698 - 702 2018年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Introduction of traffic characteristics to distinguish legitimate user traffic from DDoS attack traffic 査読あり
Y. Arikawa, H.Yamaba, K.Aburada, T.Katayama, M. Park, N.Okazak
International Symposium on Artificial Life and Robotics 484 - 489 2018年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Evaluation of farmers market information system to connect with some social stakeholders
Tende I., Kubota S., Yamaba H., Aburada K., Okazaki N.
Journal of Information Processing 26 ( 0 ) 247 - 256 2018年1月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Information Processing
© 2018 Information Processing Society of Japan. A large part of the population in Tanzania consists of rural smallholder farmers. Due to lack of market information, farmers sell crops to middlemen at lower prices and hence don’t get enough profits. Previously we developed a WEB and SMS (Short Message Service) based Farmers Market Information System using a Waterfall model which automatically replies to farmers’ requests for market prices of crops through SMS. We then improved the system so that, farmers can access crop buyers’ details and crop demand reports through SMS while crop buyers can access farmers’ details and crop demand reports through SMS or WEB. We also evaluated the effectiveness of the system to crop buyers’ incomes and times for accessing market information after implementing the system in Tanzania in the SWAHILI language. In this paper we further evaluate the system effectiveness. Findings reveal that the system helped farmers to get improved incomes and access market information in shorter times. The system also helped farmers and crop buyers to sell and buy larger quantities of crops respectively. The findings also reveal that young people can learn and use the system more easily than old people. Users can also easily learn and use the system if they can read and write in the SWAHILI language regardless of their education levels.
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Usuzaki S., Arikawa Y., Yamaba H., Aburada K., Kubota S., Park M., Okazaki N.
Journal of Information Processing 26 ( 0 ) 257 - 266 2018年1月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Information Processing
© 2018 Information Processing Society of Japan. Distributed Denial-of-Service (DDoS) attack detection systems are classified into a signature based approach and an anomaly based approach. However, such methods tend to suffer from low responsiveness. On the other hand, real-time burst detection which is used in data mining offers two advantages over traditional statistical methods. First, it can be used for real-time detection when an event is occurring, and second, it can work with less processing as information about events are compressed, even if a large number of events occur. Here, the authors add the function for attack detection in real-time burst detection technique, and propose a highly responsive DDoS attack detection technique. This paper performs experiments to evaluate its effectiveness, and discusses its detection accuracy and processing performance.
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An examination of the interactive video CAPTCHA method to resist relay attack
Tatsuda Ryohei, Aburada Kentaro, Yamaba Hisaaki, Katayama Tetsuro, Mukunoki Masayuki, Park Mirang, Okazaki Naonobu
IEICE Communications Express 7 ( 4 ) 136 - 141 2018年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：一般社団法人 電子情報通信学会
CAPTCHA is a kind of challenge response test, which is used to distinguish human users from malicious computer program such as bots. However, the attack technique called relay attack as a method to avoid the CAPTCHA has been devised. This attack relays the CAPTCHA challenges to remote human-solvers, let them to decode CAPTCHA challenges. We used delay time that is caused by communications needed in relay attack. Our new CAPTCHA uses this delay time between communications to prevent relay attacks. We constructed an experimental environment in which relay attack can be simulated, made a series of experiments in order to evaluate the performance of the proposed method.
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Development of a Monitoring System Based on Power Consumption 査読あり
Kentaro Aburada, Kengo Todaka, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Norio Shiratori et al.
The 20th International Conference on Network-Based Information Systems (NBiS-2017) 363 - 372 2017年8月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Highly Responsive Distributed Denial-of-Service Attacks Detection by Using Real-Time Burst Detection Method 査読あり
Shotaro Usuzaki, Yuki Arikawa, Hisaaki Yamaba, Kentaro Aburada, Shin-Ichiro Kubota, Mirang Park et al.
The 20th International Conference on Network-Based Information Systems (NBiS-2017) 914 - 923 2017年8月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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DDoS攻撃ログデータ解析による人と攻撃通信判別に関する研究
橘弘智, 有川祐樹, 臼崎翔太郎, 久保田真一郎, 高塚佳代子, 山場久昭, 岡崎直宣
宮崎大学工学部紀要 ( 46 ) 239 - 246 2017年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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マウストラッキングを用いたCAPTCHA方式の検討
立田怜平, 山場久昭, 久保田真一郎, 岡崎直宣
宮崎大学工学部紀要 ( 46 ) 257 - 261 2017年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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筋電位による個人認証システム実現のための筋電波形の特徴量に関する検討
黒木聡舜, 山場久昭, 久保田真一郎, 片山徹郎, 岡崎直宣
宮崎大学工学部紀要 ( 46 ) 251 - 255 2017年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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疑陽性排除サーバを用いたHTTPフラッド攻撃緩和手法の提案
有川祐樹, 久保田真一郎, 山場久昭, 岡崎直宣
宮崎大学工学部紀要 ( 46 ) 247 - 250 2017年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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録画画像を用いた攻撃に耐性を持つパズル型認証方式の提案
日隈光基, 山場久昭, 久保田真一郎, 岡崎直宣
宮崎大学工学部紀要 ( 46 ) 263 - 267 2017年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Evaluation of feature values of surface electromyograms for user authentication on mobile devices 査読あり
Yamaba H., Kurogi A., Kubota S., Katayama T., Park M., Okazaki N.
Artificial Life and Robotics 22 ( 1 ) 108 - 112 2017年3月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Artificial Life and Robotics
© 2016, ISAROB. At the present time, mobile devices, such as tablet-type PCs and smart phones, have widely penetrated into our daily lives. Therefore, an authentication method that prevents shoulder surfing is needed. We are investigating a new user authentication method for mobile devices that use surface electromyogram (s-EMG) signals, not screen touching. The s-EMG signals, which are generated by the electrical activity of muscle fibers during contraction, are detected over the skin surface. Muscle movement can be differentiated by analyzing the s-EMG. In this paper, a method that uses a list of gestures as a password is proposed. And also, results of experiments are presented that was carried out to investigate the performance of the method extracting feature values from s-EMG signals (using the Fourier transform) adopted in this research. Myo T M , which is the candidate of s-EMG measurement device used in a prototype system for future substantiative experiments, was used in the experiment together with the s-EMG measuring device used in the previous research to investigate its performance.
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Development of a Tool to Keep Consistency between a Model and a Source Code in Software Development Using MDA 査読あり
Y. Kikkawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, N. Okazaki
Journal of Robotics, Networking and Artificial Life 3 ( 4 ) 231 - 235 2017年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Prototype of Test Cases Automatic Generation Tool BWDM Based on Boundary Value Analysis with VDM++ 査読あり
H. Tachiyama, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 275 - 278 2017年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Improvement of Transitions and Flow Visualization TFVIS for Exception Handling 査読あり
T. Sato, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 283 - 287 2017年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Prototype of Refactoring Support Tool MCC Focusing on the Naming of Variables 査読あり
S. Tanoue, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 279 - 282 2017年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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An attempt to use support vector machines for a user authentication system using surface electromyogram signals 査読あり
H.Yamaba, T.Kurogi, S.Kubota, T.Katayama, M. Park, N.Okazak
International Symposium on Artificial Life and Robotics 541 - 544 2017年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Improvement of Decision Table Automatic Generation Tool VDTable for let in Statement 査読あり
Y. Huang, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 271 - 274 2017年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Takatsuka K., Sekiguchi S., Yamaba H., Kubota S., Okazaki N.
化学工学論文集 43 ( 2 ) 117 - 122 2017年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Kagaku Kogaku Ronbunshu
© 2017 The Society of Chemical Engineers, Japan. Foot-and-mouth disease (FMD), a “specific domestic animal infectious disease,” needs biosecurity in the early stage but cannot be detected during the incubation period. This problem is dealt with by use of a detection agent and by immediate culling when the outbreak begins. However, developing a detection agent raises budgetary problems, and securing sites for culling and burial takes time. In this study, we adopted an epidemiological model known as the Keeling Model and developed a mathematical method to detect infected farms during the incubation period before clinical symptoms first appear. Our model based on the Keeling Model estimates the unobservable variate _ (the infection index), which indicates the situation of the susceptible farms with the observable variates of whether or not surrounding farms infected, the number and species of animals, and the distances between farms. In addition, we devised a model (Infection Estimating Model) and an estimation approach to estimate whether or not a farm is infected. The proposed method was applied to the case of FMD that occurred in Miyazaki Prefecture in 2010, and the validity of our proposal was confirmed. Moreover, as a result of an experiment to compare estimation accuracy, a universal factor was discovered that will improve estimation accuracy.
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周囲の状況に適応する統合的認証方式での状況判定法の精度向上について
山場久昭, 長野裕孝, 高塚佳代子, 久保田真一郎, 岡崎直宣
宮崎大学工学部紀要 ( 45 ) 243 - 247 2016年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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口蹄疫の潜伏期にある農場を推定する手法の提案
高塚佳代子, 高橋弘季, 山場久昭, 久保田真一郎, 岡崎直宣
宮崎大学工学部紀要 ( 45 ) 249 - 253 2016年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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An attempt to use a gesture control armband for a user authentication system using surface electromyograms 査読あり
H.Yamaba, A.Kurogi, S.Kubota, T.Katayama, N.Okazak
International Symposium on Artificial Life and Robotics 342 - 345 2016年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Development of a Tool to Keep Consistency between a Model and a Source Code in Software Development Using MDA
Y. Kikkawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 340 - 344 2016年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Winny ネットワークにおけるクラスタリングを用いた インデックスポイゾニングシステムの実装と評価 査読あり
油田健太郎、山場久昭、片山徹郎、朴 美娘、岡崎 直宣
情報処理学会論文誌 56 ( 12 ) 2395 - 2504 2015年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Prototype of a Decision Table Generation Tool from the Formal Specification 査読あり
T. Katayama, K. Nishikawa, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Journal of Robotics, Networking and Artificial Life 2 ( 3 ) 205 - 208 2015年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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TFVIS: a Supporting Debugging Tool for Java Programs by Visualizing Data Transitions and Execution Flows 査読あり
T. Katayama, H. Nakamura, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Journal of Robotics, Networking and Artificial Life 2 ( 3 ) 177 - 181 2015年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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表面筋電位を用いた個人認証手法の検討
山場 久昭, 長友 想、久保田 真一郎，岡崎 直宣
宮崎大学工学部紀要 ( 44 ) 235 - 239 2015年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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相関ルールに基づいた位置指紋による無線LAN利用位置推定手法の重心を用いた高精細化
久保田 真一郎, 児玉 剣太朗, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 44 ) 241 - 245 2015年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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匿名通信システムTorにおけるSVMを用いたおとりWebサイト識別手法の検討
宗 裕文、吉山 友樹、横山 絵美里、山場 久昭, 久保田 真一郎，岡崎 直宣
宮崎大学工学部紀要 ( 44 ) 235 - 239 2015年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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IoT環境におけるREST通信のためのCoAPとHTTPの選択指標に関する検討
久保田 真一郎, 溝上 紘史, 山場 久昭, 岡崎 直宣
宮崎大学工学部紀要 ( 44 ) 229 - 233 2015年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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An Authentication Method Independent of Tap Operation on the Touchscreen of a Mobile Device 査読あり
Hisaaki Yamaba, So Nagatomo, Kentaro Aburada, Shinichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 2 ( 1 ) 60 - 63 2015年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Proposal of a Modification Method of a Source Code to Correspond with a Modified Model in MDA 査読あり
Tetsuro Katayama, Yuuki Kikkawa, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 2 ( 2 ) 136 - 140 2015年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Proposal and Its Evaluation of Neighbors Based Routing for ad hoc networks 査読あり
Kentaro Aburada, Hisaaki Yamaba, Shin-ichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 2 ( 2 ) 121 - 125 2015年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Prototype of a Supporting Tool to Generate Testing Communication Diagram 査読あり
Tetsuro Katayama, Seiya Urata, Yohei Ogata, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 2 ( 1 ) 9 - 12 2015年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Proposal of a Testing Method Using Similarity of Interleaving for Java Multi-threaded Programs 査読あり
Tetsuro Katayama, Shoichiro Kitano, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 1 ( 4 ) 299 - 302 2015年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Proposal of a Modification Method of a Source Code to Correspond with a Modified Model in MDA
Y. Kikkawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 384 - 387 2015年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Proposal of a Testing Method Using Similarity of Interleaving for Java Multi-threaded Programs
S. Kitano, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 380 - 383 2015年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Prototype of a Decision Table Generation Tool from the Formal Specification
K. Nishikawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 388 - 391 2015年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Evaluation of Neighbors Based Routing for ad hoc networks
Kentaro Aburada, Hisaaki Yamaba, Shinichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 335 - 338 2015年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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An Authentication Method for Mobile Devices that is Independent of Tap-Operation on a Touchscreen
Hisaaki Yamaba, So Nagatomo, Kentaro Aburada, Shinichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 327 - 330 2015年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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TFVIS: a Supporting Debugging Tool for Java Programs by Visualizing Data Transitions and Execution Flows
H. Nakamura, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 376 - 379 2015年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Prototype of a Supporting Tool to Generate Testing Communication Diagram
T. Katayama, S. Urata, Y. Ogata, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2015) 368 - 371 2015年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Proposal of a Supporting Method for Debugging to Reproduce Java Multi-threaded Programs by Petri-net 査読あり
Tetsuro Katayama, S. Kitano, Yoshihiro Kita, Hisaaki Yamaba, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 1 ( 3 ) 207 - 211 2014年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Proposal of a Supporting Method to Generate a Decision Table from the Formal Specification 査読あり
Tetsuro Katayama, K. Nishikawa, Yoshihiro Kita, Hisaaki Yamaba, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 1 ( 3 ) 174 - 178 2014年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Representation of human preference using folksonomy and the idea called concept 査読あり
Hisaaki Yamaba, Michihito Tanoue, Kayoko Takatsuka, Naonobu Okazaki, Shigeyuki Tomita
Artificial Life and Robotics 19 ( 3 ) 299 - 304 2014年11月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Proposal of a Method to Build Markov Chain Usage Model from UML Diagrams for Communication Delay Testing in Distributed Systems 査読あり
Tetsuro Katayama, Zhijia Zhao, Yoshihiro Kita, Hisaaki Yamaba, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 1 ( 2 ) 120 - 124 2014年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Proposal of a Visualizing Method of Data Transitions to Support Debugging for Java Programs 査読あり
Tetsuro Katayama, Hiroto Nakamura, Yoshihiro Kita, Hisaaki Yamaba, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life 1 ( 2 ) 111 - 115 2014年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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ユーザが抱く印象を用いた 個人嗜好の表現- Folksonomyを利用したユーザの印象の推測方法
田上道士、山場久昭、高塚佳代子、岡崎直宣、冨田重幸
宮崎大学工学部紀要 ( 43 ) 263 - 272 2014年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Proposal of a Supporting Method to Generate a Decision Table from the Formal Specification
K. Nishikawa, T. Katayama, Y. Kita, H. Yamaba, N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2014) 218 - 221 2014年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Proposal of a Supporting Method for Debugging to Reproduce Java Multi-threaded Programs by Petri-Net
S. Kitano, T. Katayama, Y. Kita, H. Yamaba, N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2014) 218 - 221 2014年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Proposal of a Method to Build Markov Chain Usage Model from UML Diagrams for Communication Delay Testing in Distributed Systems
H. Zhao, T. Katayama, Y. Kita, H. Yamaba, N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2014) 214 - 217 2014年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Proposal of a Visualizing Method of Data Transitions to Support Debugging for Java Programs
H. Nakamura, T. Katayama, Y. Kita, H. Yamaba, N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2014) 210 - 213 2014年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Representation of human preference using folksonomy and the idea called concept 査読あり
Michihito Tanoue, Hisaaki Yamaba, Kayoko Takatsuka, Naonobu Okazaki, Shigeyuki Tomita
International Symposium on Artificial Life and Robotics 162 - 167 2014年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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On a serendipity-oriented recommender system based on folksonomy 査読あり
Hisaaki Yamaba, Michihito Tanoue, Kayoko Takatsuka, Naonobu Okazaki, Shigeyuki Tomita
Artificial Life and Robotics 18 ( 1-2 ) 89 - 94 2013年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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A conversion method from an ETSC to a timed Petri net to improve the matrix-based discrete event controller and its unified support system 査読あり
Hisaaki Yamaba, Shoichiro Kitano, Kayoko Takatsuka, Tetsuro Katayama, Naonobu Okazaki, Shigeyuki Tomita
Proceedings of 17th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems 467 - 476 2013年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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On a serendipity oriented recommender system based on folksonomy and its evaluation 査読あり
Hisaaki Yamaba, Michihito Tanoue, Kayoko Takatsuka, Naonobu Okazaki, Shigeyuki Tomita
Proceedings of 17th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems 276 - 284 2013年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Serendipity を考慮した推薦システムの Folksonomy による実現とその評価
田上道士、山場久昭、高塚佳代子、岡崎直宣、冨田重幸
宮崎大学工学部紀要 ( 42 ) 313 - 318 2013年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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“Matrix-Based Discrete-Event System Controller"を拡張するためのETSCから時間ペトリネットへの変換手法とその統一的支援システム
山場久昭、北野翔一郎、高塚佳代子、片山徹郎、岡崎直宣、冨田重幸
宮崎大学工学部紀要 ( 42 ) 319 - 325 2013年8月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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DDoS攻撃者によるIPトレースバックに対する妨害手法とその対策に関する検討 査読あり
川端 良樹,喜多 義弘,油田 健太郎,山場 久昭,朴 美娘,片山 徹郎,岡崎 直宣
日本セキュリティ・マネジメント学会誌 26 ( 3 ) 15 - 32 2013年1月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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On a serendipity oriented recommender system based on folksonomy 査読あり
Hisaaki Yamaba, Michihito Tanoue, Kayoko Takatsuka, Naonobu Okazaki, Shigeyuki Tomita
International Symposium on Artificial Life and Robotics 2013年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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P2PストリーミングにおけるNAT越えを考慮した配信木構築手法の提案 査読あり
山場 久昭,鮫島 慎治,池田 匡視,油田 健太郎,岡崎 直宣,冨田 重幸,朴 美娘
情報処理学会論文誌 53 ( 7 ) 1884 - 18890 2012年7月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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On an Operational Model and a Computer Support Environment for Batch Plants Based on Adaptive Scheduling –Application of simulators to obtain initial conditions for re-scheduling– 査読あり
Hisaaki Yamaba, Shigeyuki Tomita
11th International Symposium on Process Systems Engineering (PSE2012) 2012年7月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Acquisition of Rules for Selecting Suppliers of Raw Materials in Distributed Production Systems by means of Reinforcement Learning 査読あり
Hisaaki Yamaba, Kayoko Takatsuka, Shigeyuki Tomita
International Symposium on Artificial Life and Robotics 2012年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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AGV 搬送系を持つ離散型生産システムの設計支援環境 ―オブジェクト指向によるシミュレータ生成と強化学習による AGV 制御ルールの獲得― （共著） 査読あり
山場 久昭，冨田 重幸
化学工学論文集 36 ( 2 ) 127 - 135 2010年3月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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An Operational Model and a Computer Support Environment for Batch Plants Based on Adaptive Scheduling 査読あり
Hisaaki Yamaba, Makoto Hirosaki and Shigeyuki Tomita
Proceedings of 12th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems LNAI 5179 33 - 40 2008年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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An Attempt to Obtain Scheduling Rules of Network-based Support System for Decentralized Scheduling of Distributed Production Systems 査読あり
Hisaaki Yamaba, Shinichi Matsumoto and Shigeyuki Tomita
Proceedings of 2008 IEEE International Conference on Indeutirial Informatics 506 - 511 2008年7月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Network-based Support System for Decentralized Scheduling of Distributed Production Systems through Man-Machine Collaboration 査読あり
Seigo Kaneizumi, Shigeyuki Tomita]
2006 IEEE International Conference on Industrial Informatics 2006年8月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Acquisition of AGV Control Rules Using Multi-Agent Reinforcement Learning
Shuichi Satoh, Shigeyuki Tomita]
Proceedings of PSE ASIA 2005 2005年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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On a Semantic Model for Explaining Functional Mechanisms Inhering in Micro Chemical-Devices
Kayoko Takatsuka, Shigeyuki Tomita
Proceedings of PSE ASIA 2005 2005年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Acquisition of AGV Control Rules Using Profit Sharing Method 査読あり
Hitoshi Yohsioka, Shigeyuki Tomita]
Proceedings of KES2004 2004年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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On an Object-Oriented Modeling of Supply Chain and its Operating Strategy
Shigeyuki Tomita
Proceedings of PSE 2003 2004年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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On a Generic Computational Environment for Generating Simulators for Supply Chain Management
Shigeyuki Tomita
Proceedings of PSE ASIA 2002 2002年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Acquisition of AGV Control Rules Using Reinforcement Learning（共著） 査読あり
Shigeyuki Tomita
Proceedings of KES2002 2002年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Design of flexible production system by means of tax-system-like algorithm(TA) 査読あり
Shigeyuki Tomita
Proceedings of PSE 2000 2000年8月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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ツリー型の工程を持つ多目的バッチプラントの知的運転支援システム 査読あり
冨田重幸，山場久昭，大島榮次
化学工学論文集 17 ( 4 ) 740 - 749 1991年11月
記述言語：日本語 掲載種別：研究論文（国際会議プロシーディングス）