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Ohta, Eisuke,Kobayashi, Hitoshi,Sakai, Atsushi,Matsui, Yasunori,Sato, Hiroyasu,Ikeda, Hiroshi Korean Society of Photoscience 2015 Rapid communication in photoscience Vol.4 No.2
Fluorescence (FL) properties of a novel donor-acceptor dyad, comprised of mesitylene and 1,4-dicyano-2-methylnaphthalene (DCMN) subunits connected by an ether linkage, were elucidated. The dyad in cyclohexane exhibits FL arising from an intramolecular exciplex. In the crystalline state, the dyad does not emit light from intra- and inter-molecular exciplexes but rather displays FL that is nearly equivalent to that of 2-methoxymethyl-substituted DCMN. However, the emission spectrum of the crystalline dyad contains a shoulder in the long wavelength region, suggesting that weak intercolumnar charge-transfer interactions take place between columns consisting of the mesitylene and DCMN subunits.
Development of a WLAN Based Monitoring System for Group Activity Measurement in Real-Time
Hiroshi Tsunoda,Hidehisa Nakayama,Kohei Ohta,Akihiro Suzuki,Hiroki Nishiyama,Ryoichi Nagatomi,Kazuo Hashimoto,Yuji Waizumi,Glenn Mansfield Keeni,Yoshiaki Nemoto 한국통신학회 2011 Journal of communications and networks Vol.13 No.2
In recent years, there has been a rise in epidemiological evidence suggesting the health benefits of a physically active lifestyle. However, it is not always easy for individuals to personally recognize the optimal conditions for exercise and physical activity. Wearable acceleration-based pedometers have become widely used in estimating the amount of physical activity, and to a limited extent,providing information regarding exercise intensity, but they have never been used to assess adaptation to exercise. In order to realize simultaneous activity monitoring for multiple users exercising outdoors, we developed a prototype wireless local area network (WLAN) based system. In our system, a WLAN is deployed outside, and a user wearing a smart phone and monitoring device exercises freely within the coverage area of the wireless network. By doing so, the developed system is able to monitor the activity of each user andmeasures various parameters including those related to exercise adaptation. In a demonstration experiment, the developed system was evaluated and used to monitor users enjoying a Nordic walk, after which users were immediately able to receive their exercise report. In this paper, we discuss the requirements and issues in developing an activity monitoring system and report the findings we obtained through the demonstration experiment.
DESIGN OF POTENT K+ CHANNEL OPENERS BY PHARMACOPHORE MODEL
Koga, Hiroshi,Ohta, Masateru,Sato, Haruhiko,Ishizawa, Takenori,Nabata, Hiroyuki 전남대학교 약품개발연구소 1996 약품개발연구지 Vol.4 No.1
A pharmacophore model which explains rationally structure-activity relationships of chemically diverse potent K+ channel openers, has been constructed. Potent benzopyran derivatives with thioamide, amide, and (N-cyano)amidine groups at the 4-position have been designed using the model.
Development of a WLAN Based Monitoring System for Group Activity Measurement in Real-Time
Tsunoda, Hiroshi,Nakayama, Hidehisa,Ohta, Kohei,Suzuki, Akihiro,Nishiyama, Hiroki,Nagatomi, Ryoichi,Hashimoto, Kazuo,Waizumi, Yuji,Keeni, Glenn Mansfield,Nemoto, Yoshiaki The Korea Institute of Information and Commucation 2011 Journal of communications and networks Vol.13 No.2
In recent years, there has been a rise in epidemiological evidence suggesting the health benefits of a physically active lifestyle. However, it is not always easy for individuals to personally recognize the optimal conditions for exercise and physical activity. Wearable acceleration-based pedometers have become widely used in estimating the amount of physical activity, and to a limited extent, providing information regarding exercise intensity, but they have never been used to assess adaptation to exercise. In order to realize simultaneous activity monitoring for multiple users exercising outdoors, we developed a prototype wireless local area network (WLAN) based system. In our system, a WLAN is deployed outside, and a user wearing a smart phone and monitoring device exercises freely within the coverage area of the wireless network. By doing so, the developed system is able to monitor the activity of each user andmeasures various parameters including those related to exercise adaptation. In a demonstration experiment, the developed system was evaluated and used to monitor users enjoying a Nordic walk, after which users were immediately able to receive their exercise report. In this paper, we discuss the requirements and issues in developing an activity monitoring system and report the findings we obtained through the demonstration experiment.
Hybrid Microstructure and Mechanical Properties of HRS Processed SUS316L and Titanium Materials
Fujiwara Hiroshi,Ohta Koichi,Noro Atsushi,Ameyama Kei 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
SUS316L stainless steel, commercial pure Titanium and Ti-6Al-4V alloy powders applied by Mechanical Milling (MM) process are sintered by Hot Roll Sintering (HRS) process. Microstructure and mechanical properties of those HRS materials is investigated. The microstructures of materials produced by HRS process consist of fine grains and work-hardened structure, that is, the hybrid microstructure. Tensile test of the HRS material demonstrated the good mechanical properties. These results show that the HRS process is very effective to the improvement of mechanical properties in the SUS316L stainless steel, commercial pure Titanium and Ti-6Al-4V alloy.
A proposal of TCP congestion control for LEO Satellite Network taking into account handover problem
Tsunoda, Hiroshi,Ohta, Kohei,Kato, Nei,Nemoto, Yoshiaki 통신위성우주산업연구회 2000 Joint Conference on Satellite Communications Vol.2000 No.-
Recently, much research attention has been focused on LEO satellite networks connected to ISL(Inter Satellite Link). A global network, covering the whole earth, can be developed if wireless and wired networks are seamlessly connected by TCP/IP protocol. However, being originally designed for wired networks, the implementation of TCP/IP on LEO satellite networks may give rise to some difficulties, such as dynamic propagation delay caused by handover and re-routing. In this paper, we propose enhanced TCP congestion control mechanism for LEO satellite network. Our proposal aims to attenuate handover problem with the use of IP header's TTL field. Our simulation results show how effective our mechanism is avoiding unnecessary fast retransmit and decreasing congestion.
CSX Chart for A Small Number of Subgroups
Etsuko Kusukawa,Hiroshi Ohta 대한산업공학회 2003 Industrial Engineeering & Management Systems Vol.2 No.2
Steiner has presented a CS (Confirmation Sample)chart to detect more sensitively small ormoderate shifts in the process mean from the in-control state on the Shewhartchart. In the case that in-control values for the process mean and variance,and, are unknown, these unknown parameter values are estimated from some m initial subgroups of size n taken when the process is believed to be stable. When the centerline and control limits of thechart are set up by using these estimated parameters, the actual values of type I error of thechart does not match the specified value of it. Recently, Nedumaran and Pignatiello have presented an approach for constructing control limits of thechart when those control limits are estimated using data from a small number of subgroups, based on the run length distribution. In this paperwe construct a modifiedchart for a small number of subgroups, based on the approach proposed by Nedumaran and Pignatiello. The performance of the proposed chart was compared with those of the usual chart and the modifiedchart constructed by Nedumaran and Pignatiello through the computer simulations.