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- 저자 : Koji Tominaga (검색결과 3 건)
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A POWER CONSUMPTION ANALYSIS OF ULTRA-LOW POWER MICROCONTROLLERS
Koji TOMINAGA,Koichiro TANAKA 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper reports the measurement results of the power consumption provided to an ultra-low-power microcontroller. Recently, mobile devices equipped with wireless communication capabilities have been effectively used by many people. Therefore, there are quite a lot of demands to adapt the capabilities to mobile devices without them. However, mobile devices which are required long battery life might not operate correctly when the module equipped with the capabilities simply connects them because the module consumes a big electric power. Ultralow-power microcontrollers will be able to reduce the power consumption of the system including their communication modules by controlling them. However, it is necessary to decrease the power consumption of the microcontroller to achieve this. Then, we measure the power consumption of MSP430 microcontrollers made by Texas Instruments. In the experiment, the power consumption value in some microcontrollers which only the internal memory size is different is measured. Moreover, the power consumption of the microcontroller in four of low-power modes (LPMs) are investigated. As a result, the microcontrollers with different internal memory size have showed the same power consumption. In addition, the power consumption of it has decreased when the LPM rise. In this paper, these results are shown in detail. In addition, the system that transmits the digital data converted from analog data by wireless communication.
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Experimental Flight of KIT Student’s Rocket in France
Koji Okuda,Yuji Ujimoto,Yuta Otsuka,Takaya Sato,Takuya Shidooka,Daijiro Semba,Kenichi Tominaga,Junichi Fukuda,Yuta Yamamoto,Kazuki Wada,Shinichi Sagara,Koichi Yonemoto 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
KIT Student's Rocket has been developed by a student group of Kyushu Institute of Technology lor rocket launch campaign held at La Courtine in France since 2006. This paper introduces the newest design of rocket. The rocket has the body length of 2120㎜, and weighs 14.6㎏ and can reach to an altitude of about 700㎜ by a solid rocket motor provided by CNES (the French Centre National D’Etudes Spatiales). The rocket is controlling rolling attitude during ascent phase and then deploying a parafoil at the apogee of the trajectory for recovery guidance to an aiming point.
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Yoko Kato,Kuriko Kagitani-Shimono,Junko Matsuzaki,Ryuzo Hanaie,Tomoka Yamamoto,Koji Tominaga,Yoshiyuki Watanabe,Ikuko Mohri,Masako Taniike 대한신경정신의학회 2019 PSYCHIATRY INVESTIGATION Vol.16 No.3
Objective: The purpose of the present study was to clarify the relationship between white matter tracts and cognitive symptoms in children with high-functioning autism spectrum disorder (ASD). Methods: We examined the cognitive functions of 17 children with high-functioning ASD and 18 typically developing (TD) controls and performed diffusion tensor imaging (DTI) tractography. We compared the results between the groups and investigated the correlations between the cognitive scores and DTI parameters within each group. Results: The Comprehension scores in the ASD group exhibited a positive correlation with mean diffusivity (MD) in the forceps minor (F minor). In the TD group, the Comprehension scores were positively correlated with fractional anisotropy (FA) in the right inferior fronto-occipital fasciculus (IFO) and left anterior thalamic radiation (ATR), and negatively correlated with MD in the left ATR, radial diffusivity (RD) in the right IFO, and RD in the left ATR. Additionally, a positive correlation was observed between the Matching Numbers scores and MD in the left uncinate fasciculus and F minor, and RD in the F minor. Furthermore, the Sentence Questions scores exhibited a positive correlation with RD in the right inferior longitudinal fasciculus. Relative to TD controls, the specific tract showing a strong correlation with the cognitive scores was reduced in the ASD group. Conclusion: Our findings indicate that white matter tracts connecting specific brain areas may exhibit a weaker relationship with cognitive functions in children with ASD, resulting in less efficient cognitive pathways than those observed in TD children.
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