Papers - YAMABA Hisaaki
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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 2018.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：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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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
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：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 Reviewed
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 2017.8
Language：English Publishing type：Research paper (international conference proceedings)
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Highly Responsive Distributed Denial-of-Service Attacks Detection by Using Real-Time Burst Detection Method Reviewed
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 2017.8
Language：English Publishing type：Research paper (international conference proceedings)
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Discriminating Legitimate Access from a Web Access Log Recorded During DDoS Attack
Hiroaki Tachibana, Yuki Arikawa, Shotaro Usuzaki, Shin-Ichiro Kubota, Kayoko Takatsuka, Hisaaki Yamana, Naonobu Okazaki
MEMOIRS OF THE FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI ( 46 ) 239 - 246 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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A Proposal of a Mitigation Method of HTTP Flood Attacks Using a Server for Detailed Examination of Pseudo Positive Accesses
Yuki Arikawa, Shin-Ichiro Kubota, Hisaaki Yamana, Naonobu Okazaki
MEMOIRS OF THE FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI ( 46 ) 247 - 250 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Evaluation of Feature Values of Surface Electromyograms for User Authentication of Mobile Devices
Tokiyoshi Kurogi, Hisaaki Yamana, Shin-Ichiro Kubota, Tetsuro Katayama, Naonobu Okazaki
MEMOIRS OF THE FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI ( 46 ) 251 - 255 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Proposal of Puzzle Authentication Method with Video Recording Attack Resistance
Koki Hinokuma, Hisaaki Yamana, Shin-Ichiro Kubota, Naonobu Okazaki
MEMOIRS OF THE FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI ( 46 ) 263 - 267 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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A study on the CAPTHA Using Mouse Tracking
Ryohei Tatsuda, Hisaaki Yamana, Shin-Ichiro Kubota, Naonobu Okazaki
MEMOIRS OF THE FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI ( 46 ) 257 - 261 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Evaluation of feature values of surface electromyograms for user authentication on mobile devices Reviewed
Yamaba H., Kurogi A., Kubota S., Katayama T., Park M., Okazaki N.
Artificial Life and Robotics 22 ( 1 ) 108 - 112 2017.3
Language：English Publishing type：Research paper (scientific journal) Publisher：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 Reviewed
Y. Kikkawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, N. Okazaki
Journal of Robotics, Networking and Artificial Life 3 ( 4 ) 231 - 235 2017.3
Language：English Publishing type：Research paper (scientific journal)
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Prototype of Test Cases Automatic Generation Tool BWDM Based on Boundary Value Analysis with VDM++ Reviewed
H. Tachiyama, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 275 - 278 2017.1
Language：English Publishing type：Research paper (international conference proceedings)
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Improvement of Transitions and Flow Visualization TFVIS for Exception Handling Reviewed
T. Sato, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 283 - 287 2017.1
Language：English Publishing type：Research paper (international conference proceedings)
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Prototype of Refactoring Support Tool MCC Focusing on the Naming of Variables Reviewed
S. Tanoue, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 279 - 282 2017.1
Language：English Publishing type：Research paper (international conference proceedings)
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Improvement of Decision Table Automatic Generation Tool VDTable for let in Statement Reviewed
Y. Huang, T. Katayama, Y. Kita, H. Yamaba, and N. Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB 2017) 271 - 274 2017.1
Language：English Publishing type：Research paper (international conference proceedings)
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An attempt to use support vector machines for a user authentication system using surface electromyogram signals Reviewed
H.Yamaba, T.Kurogi, S.Kubota, T.Katayama, M. Park, N.Okazak
International Symposium on Artificial Life and Robotics 541 - 544 2017.1
Language：English Publishing type：Research paper (international conference proceedings)
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Takatsuka Kayoko, Sekiguchi Satoshi, Yamaba Hisaaki, Kubota Shinichiro, Okazaki Naonobu
KAGAKU KOGAKU RONBUNSHU 43 ( 2 ) 117 - 122 2017
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan
<p>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 λ (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.</p>
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On Accuracy Improvement in Surroundings Estimation for Surroundings Adaptable Integrated Authentication Method
Hisaaki Yamana, Hirotaka Nagano, Kayoko Takatsuka, Shin-Ichiro Kubota, Naonobu Okazaki
MEMOIRS OF THE FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI ( 45 ) 243 - 247 2016.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Development of the Mathematic Technique to Detect Infections-farm Which Is in Latency Period of Foot-and-mouth Disease
Kayoko Takatsuka, Koki Takahashi, Hisaaki Yamana, Shin-Ichiro Kubota, Naonobu Okazaki
MEMOIRS OF THE FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI ( 45 ) 249 - 253 2016.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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An attempt to use a gesture control armband for a user authentication system using surface electromyograms Reviewed
H.Yamaba, A.Kurogi, S.Kubota, T.Katayama, N.Okazak
International Symposium on Artificial Life and Robotics 342 - 345 2016.1
Language：English Publishing type：Research paper (international conference proceedings)