著者

Akira Takahashi Azusa Yamaguchi Yoshimune Nonomura

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.140778, (Released:2014-09-09)

被引用文献数

6

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We evaluated the frictional force between two finger models that mimic properties of fingertips. Friction dynamics were drastically changed with the presence of fingerprints and variations in sliding speed and vertical force. For example, a periodic variation of the frictional force was observed under slow sliding conditions between finger models with fingerprint-like rough surfaces.

著者

Akira TAKAHASHI Takanori HAYASHI

出版者

The Institute of Electronics, Information and Communication Engineers

雑誌

IEICE Transactions on Communications (ISSN:09168516)

巻号頁・発行日

vol.E100.B, no.9, pp.1554-1563, 2017-09-01 (Released:2017-09-01)

参考文献数

23

被引用文献数

2

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We propose a framework called “QoE-centric Service Operation,” with which we attempt to implement a means to enable the collaboration of end-users, service providers, and network providers to achieve better QoE of telecommunication services. First, we give an overview of the transition in the quality factors of voice, video, and web-browsing applications. Then, taking into account the fact that many quality factors exist not only in networks, but also in servers and terminals, we discuss how to measure, assess, analyze, and control QoE and the technical requirements in each component. We also propose approaches to meet these requirements: packet- and KPI-based QoE estimation, compensation of sparse measurement, and quality prediction based on human behavior and traffic estimation. Finally, we explain the results of our proof-of-concept study using an actual video delivery service in Japan.

著者

Ayumi Yoshimoto Takashi Uebanso Mutsumi Nakahashi Takaaki Shimohata Kazuaki Mawatari Akira Takahashi

出版者

SOCIETY FOR FREE RADICAL RESEARCH JAPAN

雑誌

Journal of Clinical Biochemistry and Nutrition (ISSN:09120009)

巻号頁・発行日

vol.62, no.2, pp.155-160, 2018 (Released:2018-03-01)

参考文献数

25

被引用文献数

12

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Several environmental factors during the prenatal period transgenerationally affect the health of newborns in later life. Because low-dose antibiotics have been used for promoting the growth of crops and livestock in agriculture, humans may have ingested residual antibiotics for several decades. However, the effect of prenatal administration of low-dose antibiotics on newborns’ health in later life is unclear. In the present study, we found that prenatal treatment of murine mothers with low-dose antibiotics increased the abundance of bacteria of the phylum Firmicutes and the genera Clostridium IV and XIVa in feces from pups. In addition, the body fat percentage of mice in the antibiotic-treated group was higher than those in the control group at 12 weeks of age even though all pups were fed a standard diet. The body fat percentage of all mice was correlated with the abundance of fecal bacteria of Clostridium IV and XIVa. These results predict that low-dose antibiotic administration during the prenatal period affects the gut microbiota of newborns and possibly their health in later life.

著者

平沢 尚彦 高橋 晃 渡辺 興亜 佐藤 夏雄 Naohiko Hirasawa Akira Takahashi Okitsugu Watanabe Natsuo Sato

雑誌

南極資料 = Antarctic Record (ISSN:00857289)

巻号頁・発行日

vol.40, no.2, pp.255-258, 1996-07

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本研究小集会の目的はSARデータを使った南極氷床・氷河に関する最近の研究成果, 及び今後の研究計画について議論することである。本会は1996年2月6日, 極地研究所講義室において行われ, 出席者は約30名であった。SAR画像に見られる様々な模様にについての紹介, 飛行機観測や可視画像との比較, 現地氷状観測との比較, インターフェロメトリの今後の課題などが議論された。The main purpose of the workshop is to discuss recent results of Antarctic research using SAR data. It was held on February 6,1996 at the National Institute of Polar Research (NIPR), the number of participants being about 30. The contents of the workshop are demonstration of various SAR images, comparison with pictures from an airplane and visible images, comparison with observational data on ice conditions and demonstration of problems in interferometry.