Takeshi Tanaka

20220102-03
Feedback control of ozone concentration in a room using an ozone generator and the Internet of Things with built-in sensor
Takeshi Tanaka, Masayuki Yamauchi, Koji Kakugawa, Toshikazu Uchida, Shigekazu Ishihara, Keiko Ishihara

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Recently, coronavirus has spread worldwide and is becoming a major challenge. Under such circumstances, coronavirus inactivation using ozone has been reported. We have also installed a Sigfox antenna at Hiroshima Institute ...  read more

20200912-01
Transmission of environment data with preliminary secret sharing processing using Sigfox
Nobuharu Okamitsu, Koichi Miyazono, Takeshi Tanaka

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Using the Sigfox network and the Internet, we created Internet-of-Things devices equipped with temperature, humidity, and barometric pressure sensors to measure the environment data. In this study, we developed a way to process ...  read more

20200508-03
IoT device with Global Positioning System using SigFox, ThingSpeak, and Anaconda platform
Takeshi Tanaka, Nobuharu Okamitsu, Kenshi Nishino

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We have developed a rudimentary Internet of Things (IoT) device equipped with a global positioning system module using the Sigfox network. The data sent from the IoT device using Sigfox Cloud and ThingSpeak are received and ...  read more

20200304-01
Development of an IoT device using SigFox, ThingSpeak, and MATLAB/Simulink
Takeshi Tanaka, Nobuharu Okamitsu, Takuma Hamada, Kenshi Nishino

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We installed a Sigfox antenna at Hiroshima Institute of Technology and acquired basic environmental data via the Sigfox network. The IoT device created by us comprises Sigfox, ThingSpeak, and MATLAB/Simulink, and this configuration ...  read more

20181112-08
Construction of a preliminary educational system for file backup system using secret sharing technique
Takeshi Tanaka, Nobuharu Okamitsu, Noriyuki Yamada, Toyoharu Takemoto, Katia Vutova

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Information-Technology Promotion Agency points out Ransomware as the second-ranked damage to organizations as well as individuals in “10 Major Security Threats 2017”. Information is stored in three data files separately ...  read more

20180910-06
Construction of a preliminary file backup system for surface analysis data using secret sharing technique
Nobuharu Okamitsu, Tomonori Tabe, Ryota Matsuda, Noriyuki Yamada, Toyoharu Takemoto, Takeshi Tanaka

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We have established a preliminary file backup system to study the outline of secret sharing technology and test operations. Secret sharing scheme is a key management scheme or key establishment scheme invented separately in ...  read more

20140304-08
Corporate education for manufacturing (Semiconductors) – creation of a training system and technical textbook
Hiroyuki Izumo, Keisuke Konishi, Rei Wada, Takashi Imagawa, Susumu Kise, Shenji Hatada, Takeshi Tanaka, Shigeo Hirano

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Artner Co., Ltd. is currently dependant on a variety of outsourcing systems that have been implemented with a high degree of technical assistance for the completion of projects. In large scale integration (LSI) design and ...  read more

20140506-59
Estimation of Self-Ignited Plasma Density Using Plasma-Based Ion Implantation
Nobuyuki Fujimura, Kazuhiro Shimono, Hiromitsu Noguchi, Hiroshi Toyota, Yoshito Shirai, Takeshi Tanaka

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Plasma density is estimated from the target voltage and current characteristics of the pulse modulator circuit in plasma-based ion implantation. The voltage recovery time constant directly reflects the ion sheath characteristics, ...  read more

20140506-58
Spore-Forming Bacteria Sterilization Using Plasma-Based Ion Implantation
Koji Kakugawa, Masatoshi Kubo, Hiromitsu Noguchi, Kazuhiro Shimono, Nobuyuki Fujimura, Yoshinobu Tsuchiya, Takeshi Tanaka

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A main purpose of sterilization is to kill the harmful microorganisms. In food industry, the representatives of microorganisms which are difficult to sterilize are spore-forming bacteria. Because these bacteria are extremely ...  read more

20140506-57
Comparison of Plasma Spectral Characteristics Using a Plasma- Based Ion Implantation
Hiromitsu Noguchi, Nobuyuki Fujimura, Kazuhiro Shimono, Hiroshi Toyota, Yoshito Shirai and Takeshi Tanaka

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Plasma-based ion implantation is a recently developed technique used to modify the surface of materials by immersion in plasma coupled with the application of a negative bias voltage.

In this study, we compare the properties ...  read more