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(Fujio Sekigawa) 한국약제학회 1993 PROCEEDINGS OF THE FIP POST-SATELLITE SYMPOSIUM `9 Vol.- No.-
These days, it is not uncommon that a same kind of drug is circulated globally. However, the qualities of excipients used in the same drug have to be sometimes different depending on the different requirements in the qualities stipulated by each country. For a supplier of pharmaceutical excipients, it is generally necessary to carry out different tests on the same kind of testing criteria depending on the country of destination. Thus, the discrepancies between compendium requirements of pharmaceutical excipients create severe problems in various area of industrial activities. The decision of the United States Pharmacopoeia, European Pharmacopoeia and Japanese Pharmacopoeia Commissions to harmonize the requirements is a unique chance for the industries to overcome these problems. On the other hand, discrepancies of general test methods and requirements in each monograph of pharmaceutical excipient between the compendia valid at present are in most cases extensive. Consequently their harmonization needs a lot of detailed work requiring strong support from the industry. Based on these circumstances, pharmaceutical excipients councils have been established first in U.S.A. and successively in Europe and in Japan to contribute to the harmorization process. We should like to review here the progress since the Orlando Conference in 1991 and comment about the matters at issue with regard to the international harmonization of pharmaceutical excipients.
日本における環境保全政策と港灣の整備 - 瀨戶內海沿岸域の事例 -
Fujio Chisuwa 한국항만경제학회 1994 韓國港灣經濟學會誌 Vol.10 No.-
Out line of the theme<br/> l. Japan has a tendency of partial accumulation on metropolis and Osaka Bay Areas consisting of economic, political, cultural and social activities. The plans and policies intend ing to correct this tendency and accerate economic growth brought out environmental destroys for nature and human life over Japan.<br/> 2. Japanese government enacted a number of laws and regulations on conservating human life environment, restricting outbreak of many kinds of harms for health, making remedies for sufferers and preservation systems for natural environment from the end of 1960's.<br/> 3. Laws and regulations have been enacted by power balance between circles of industries and peoples. Peoples have brought suits against firms which had caused public disasters, also against local and central governments upon their directing responsibilities to these firms, and resisted against local and/or central governments and their agencies for development plans like as port development ,etc.<br/> 1. There are three main measures in environment conservation projects among port , development. One of them is to receive waste matters and neccessary fad Ii ties from back and inland cities or districts. The second is to recover and maintain natural and labour environment in port areas themselves. And the third is to create amenities spaces fer all classes' peoples. These projects have been planning and performing in Seta Inner Sea Area.
A New High Performance Auto-Tuning Digital Control Circuit for Buck-Boost Converter
Fujio Kurokawa,Taku Ishibashi,Yoshihiko Komichi,Tadatoshi Babasaki 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
The purpose of this paper is to present the dynamic characteristics of the new high performance autotuning digital control circuit for buck-boost converter when the step change of the load resistance R from 20 Ω to 10Ω. The buck-boost dc-dc converter is used with wide input voltage changing. At the same time, the suitable proportional gain and bias value are changing against the input voltage and the load resistance of the converter. So, we took two methods that changing proportional gain automatically and changing bias value against the input voltage, the load resistance and the loss of the converter. As a result, using this proposed method it is revealed that not only the dynamic characteristic but also regulation characteristic can be improved and it is effective for wide range input voltage. Especially, the steady-state error is improved from 470㎷ to 50㎷ when the input voltage is 5V, 700㎷ to 40㎷ when the input voltage is 15V, respectively.
Fujio Ito,Zenya Ito,Motohide Shibayama,Shu Nakamura,Minoru Yamada,Hideki Yoshimatu,Mikinobu Takeuchi,Kenzo Shimizu,Yasushi Miura 대한척추신경외과학회 2019 Neurospine Vol.16 No.1
Objective: Spinal stenosis is increasingly common due to population aging. In elderly patients with lumbar central canal stenosis (LCCS), minimizing muscle damage and bone resection is particularly important. We performed a step-by-step operation with a newly designed spinal endoscope to obtain adequate decompression in patients with spinal stenosis. Methods: From April 2015 to August 2016, 78 patients (48 males, 30 females) with LCCS (91 segments) underwent endoscopic decompression using a newly designed endoscope system. The inclusion criteria were: (1) neurogenic intermittent claudication with or without radiculopathy, (2) LCCS, and (3) having exhausted conservative treatment (>3 months). The exclusion criteria were: (1) >10° of instability, (2) spondylolisthesis grade II or greater according to the Meyerding criteria, (3) foraminal stenosis, (4) vascular intermittent claudication, (5) infection, and (6) stenosis combined with malignancy. We performed a step-by-step procedure using a newly designed endoscope system for unilateral-approach bilateral decompression. We used the same incision for 2–3 segments, only moving the skin. Results: The mean follow-up was 2.3±1.3 years. Excellent or good results were found according to the MacNab criteria in 85.9% of cases (67 of 78). The visual analogue scale, Japanese Orthopedic Association score, and Oswestry Disability Index showed significant decreases at 1 month, persisting until the 2-year follow-up. Dural tear occurred in 4 cases (5.1%), and patch repair was performed under endoscopy. No patients experienced aggravated instability requiring surgery. Conclusion: We obtained good results with endoscopic decompression surgery using a newly designed instrument that minimized muscle and bone damage in elderly patients with spinal stenosis.
Studies on a Wind Turbine Generator System using a Shaft Generator System
Fujio Tatsuta,Toshiyuki Tsuji,Nobuharu Emi,Shoji Nishikata 대한전기학회 2006 Journal of Electrical Engineering & Technology Vol.1 No.2
In this paper a new de-link type wind turbine generator system using a shaft generator system, which is widely used for power sources in a ship, is proposed. The basic configuration of the proposed wind turbine generating system is first explained. And the equations expressing the system are derived. Then the steady-state characteristics of the generating system are discussed. We use an experimental system that can simulate the characteristics of a wind turbine in this study, because it is hard to operate an actual wind turbine in a laboratory. In addition, the transient responses of this system are investigated when the velocity of the wind is changed. It is shown that experimental results were very close to the simulated ones, supporting the usefulness of the theory.
Dynamic Characteristics of DC-DC Converters Using Digital Filters
Fujio Kurokawa,Masashi Okamatsu,Taku Ishibashi,Yasuyuki Nishida 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.3
This paper presents the dynamic characteristics of buck and buck-boost dc-dc converters with digital filters. At first, the PID, the minimum phase FIR filter and the IIR filter controls are discussed in the buck dc-dc converter. Comparisons of the dynamic characteristics between the buck and buck-boost converters are then discussed. As a result, it is clarified that the superior dynamic characteristics are realized in the IIR filter method. In the buck converter, the undershoot is less than 2% and the transient time is less than 0.4ms. On the other hand, in the buck-boost converter, the undershoot is about 3%. However, the transient time is approximately over 4ms because the output capacitance is too large to suppress the output voltage ripple in this type of converter.
The Dialectics of Space Subsumption, Struggle in Space, and Position of Localities
Fujio Mizuoka 부산대학교 한국민족문화연구소 2012 Localities Vol.- No.2
Society and space are elements in a dialectical separation within a unity. The former is in a position to subsume the latter. Once subsumption occurs, contradictions emerge, which must be negated through real subsumption: bounding and spatial integration. These socio-spatial dialectics are class- and ethnic-specific; thus, space subsumption is inevitably the contested terrain among different classes and ethnic groups. This article examines several spatial contradictions: the relation between the more institutionalized Wirkungsraum and the more anarchical Aktionsraum; networks with the inherent paradox to create spatial unevenness and struggles over “stray space,” class, or ethnically specific modes of territorial integration in the central-place system; and scale jumping. All these manifest the struggle between les représentation de l’espace and les espaces de représentation (Lefebvre [1974] 1991). It is the task of critical geographers to propagate and explore this struggle and prove that space is indeed an indispensable element in waging a social battle.