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Configurations of AC and DC-type Quality Control Center for a New Distribution System FRIENDS
Yusuke Hayashi,Masaki Saisyo,Toshifumi Ise,Kuchiro Tsuji 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
Unbundled power quality service is paid much attention under the circumstances of deregulation and diversification of needs of customers for quality and price of electric power Moreover, distributed generators (DGs) such as photovoltaic generations and wind turbines will be introduced to distribution system more and more, and reverse flow of active power has possibility to cause new problems in the distribution system such as voltage rise of distribution line and protection problem<br/> Flexible, Reliable and Intelligent Electrical eNergy Delivery System, which is called FRIENDS, has been proposed as one of promising distribution system for such requirements, and intensive studies are under way One of features of the system is introducing Quality Control Center (QCC) into the system for unbundled power quality service and easy installation of DGs Two types of QCCs for such purposes are proposed, and simulation results are shown in this paper.<br/>
Fabrication of 8Cr-2W ferritic steel tile for reduction in toroidal magnetic field ripple on JT-60U
yusuke Kudo,K. Masaki,M. Honda,N. Miya,R. Takahashi,S. Jitsukawa,S. Sakurai,T. Sawai,T. Sasajima,T. Hayashi,Y. Suzuki 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The objectives are to fabricate the ferritic steel for the reduction in the toroidal magnetic field ripple on JT-60U. The ferritic steel (8Cr-2W-0.2V) is selected by saturated magnetization and fabrication processes with more than 20 tons melting are reported. Although the magnetic properties of the plates fabricated are clarified, the little variation is observed but the saturated magnetization is lower than expected. Additional material conditions are clarified to improve the saturated magnetization without degradation of mechanical properties but it is decided not to adapt this process on grounds of cost-effectivenessP
( Tatsuya Hayashi ),( Satoshi Saitoh ),( Kei Fukuzawa ),( Yoshinori Tsuji ),( Junji Takahashi ),( Yusuke Kawamura ),( Norio Akuta ),( Masahiro Kobayashi ),( Kenji Ikeda ),( Takeshi Fujii ),( Tosiaki M 대한간학회 2017 Gut and Liver Vol.11 No.5
Background/Aims: Noninvasive liver fibrosis evaluation was performed in patients with nonalcoholic fatty liver disease (NAFLD). We used a quantitative method based on the he-patic volume acquired from gadoxetate disodium-enhanced (Gd-EOB-DTPA-enhanced) magnetic resonance imaging (MRI) for diagnosing advanced fibrosis in patients with NAFLD. Methods: A total of 130 patients who were diagnosed with NAFLD and underwent Gd-EOB-DTPA-enhanced MRI were retrospectively included. Histological data were available for 118 patients. Hepatic volumetric parameters, including the left hepatic lobe to right hepatic lobe volume ratio (L/R ratio), were measured. The usefulness of the L/R ratio for diag-nosing fibrosis ≥F3-4 and F4 was assessed using the area under the receiver operating characteristic (AUROC) curve. Multiple regression analysis was performed to identify vari-ables (age, body mass index, serum fibrosis markers, and histological features) that were associated with the L/R ratio. Results: The L/R ratio demonstrated good performance in differentiating advanced fibrosis (AUROC, 0.80; 95% confi-dence interval, 0.72 to 0.88) from cirrhosis (AUROC, 0.87; 95% confidence interval, 0.75 to 0.99). Multiple regression analysis showed that only fibrosis was significantly associat-ed with the L/R ratio (coefficient, 0.121; p<0.0001). Conclu-sions: The L/R ratio, which is not influenced by pathologi-cal parameters other than fibrosis, is useful for diagnosing cirrhosis in patients with NAFLD. (Gut Liver 2017;11:674- 683)
Takizawa Yusuke,Furuno Yuka,Hayashi Masahiro 한국약제학회 2021 Journal of Pharmaceutical Investigation Vol.51 No.3
Purpose Although pharmaceutical excipients do not affect the membrane permeation of active drugs, some have been shown to influence absorption-regulating factors. However, limited information is currently available on the effects of pharmaceutical excipients on membrane permeation via passive transcellular transport, which is the main membrane permeation route of many drugs. Methods We herein focused on polyvinylpyrrolidone (PVP) (K90), which is used as a diluent and binder in pharmaceutical formulations, and examined its effects on passive transport via the transcellular route in the rat jejunum using the in vitro sac method. Results The membrane permeation of β-naphthol, a passive transcellular marker, was increased by the co-existence of 0.02 w/v % PVP (K90). However, PVP (K90)-induced increases in membrane permeation were not observed following a pre-incubation with PVP (K90). Therefore, PVP (K90)-induced increases in membrane permeation may be attributed to a drug-excipient interaction, but not a mucosal membrane-excipient interaction. Conclusion PVP (K90) affected membrane transport via the transcellular route in the rat jejunum. However, since the coexistence of PVP (K90) did not influence membrane protein expression levels or cause membrane lesions, the absorption of active drugs may be regulated by the optimal application of PVP (K90).
De-industrialization and the Changes in Occupational Structure in Three East Asian Cities
Hearan Koo,Yusuke Hayashi,Dingjun Weng,Jingqian Bi 서울대학교 사회발전연구소 2016 Journal of Asian Sociology Vol.45 No.3
This paper aims to examine a pattern of recent changes in occupational structure across Tokyo, Shanghai, and Seoul. We address the following questions; 1) considering different stages of economy in three countries, do employment structures in Seoul, Tokyo, and Shanghai show different patterns, corresponding to the economic development stage? 2) to what extent are employment structures in the three cities polarizing, or upgrading?, and 3) who fills newly created jobs? Are there any socio-demographic patterns in the distribution of employment gains? We particularly focus on the relationship between (de)industrialization and occupational transformation. The results demonstrate that deindustrialization tends to have similar polarization effects in Tokyo and Seoul, considering the decline in manufacturing workers and concomitant loss of middle income jobs. The job polarization has deepened in Tokyo due to its more mature industrial structure. Seoul has yet to reach the same level of occupational disparity, but shows a sign of polarized upgrading with strong job growth at the top of the occupational hierarchy and weak growth at the bottom. In Shanghai, newly created jobs are mainly concentrated in the mid to high income ranges, indicating the predominant upgrading in Shanghai’s occupational structure. We find unequal distribution of jobs in all three cities, although disadvantaged groups differ across cities. We end this paper with several concluding remarks.
Development of Knee Joint Robot for Students Becoming Therapist
Yoshifumi Morita,Yuki Kawai,Yusuke Hayashi,Tatsuya Hirano,Hiroyuki Ukai,Kouji Sanaka,Hironori Nakamuta,Keiko Takao 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
The authors are developing a knee joint robot as an educational tool for students becoming physical therapist (PT) or occupational therapist (OT). The robot can simulate some problems of a knee joint, such as range of motion trouble, contracture, rigidity, spasticity and so on. The robot has a knee joint mechanism to realize not only flexion/extension movement but also inner/outer rotation movement, which is based on the idea of rolling, sliding and coming off movement. In addition the robot has the wire drive system to control the knee joint passive movement. In this paper we design optimal arrangement of four pulleys in the wire drive system by introducing performance indices. In addition we design control algorithms to imitate two kinds of knee joint troubles and verify the effectiveness by fundamental experiments.
Fujimori, Taro,Miyamoto, Yusuke,Hayashi, Yasuhiro The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.4
Photovoltaic (PV) systems have rapidly proliferated in Japan. One resulting problem is that PV output not consumed by residences is fed to distribution lines, significantly increasing voltage in the distribution system. Power conditioning systems must therefore suppress PV output to maintain appropriate voltage levels. This paper proposes a control method for diverting reverse power flow into storage batteries, avoiding the need for suppression. Another problem is that batteries are expensive, making it necessary to reduce total battery capacity. This paper therefore identifies residences where storage batteries should be introduced by calculating a suitability evaluation coefficient. This allows allocation of a priority sequence for introducing batteries into highly ranked residences. The authors furthermore begin investigation of battery control methods for effective suppression of battery output.
Chronic Stress Induces Neurotrophin-3 in Rat Submandibular Gland
Juri Saruta,Keiichi Tsukinoki,Michitaro Iida,Yusuke Kondo,Masahiro To,Takashi Hayashi,Mayumi Hori,Sadao Sato 연세대학교의과대학 2012 Yonsei medical journal Vol.53 No.6
Purpose: Plasma neurotrophin-3 (NT-3) levels are associated with several neural disorders. We previously reported that neurotrophins were released from salivary glands following acute immobilization stress. While the salivary glands were the source of plasma neurotrophins in that situation, the association between the expression of neurotrophins and the salivary gland under chronic stress conditions is not well understood. In the present study, we investigated whether NT-3 levels in the salivary gland and plasma were influenced by chronic stress. Materials and Methods: Expressions of NT-3 mRNA and protein were characterized, using real-time polymerase chain reactions, enzyme-linked immunosorbent assay, and immunohistochemistry,in the submandibular glands of male rats exposed to chronic stress (12 h daily for 22 days). Results: Plasma NT-3 levels were significantly increased by chronic stress (p<0.05), and remained elevated in bilaterally sialoadenectomized rats under the same condition. Since chronic stress increases plasma NT-3 levels in the sialoadenectomized rat model, plasma NT-3 levels were not exclusively dependent on salivary glands. Conclusion: While the salivary gland was identified in our previous study as the source of plasma neurotrophins during acute stress, the exposure to long-term stress likely affects a variety of organs capable of releasing NT-3 into the bloodstream. In addition, the elevation of plasma NT-3 levels may play important roles in homeostasis under stress conditions.