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A Study on the Better Operation of Occupational Safety and Health Management Systems
Choi, Jae-Wook,Yoon, Seok-J.,Lee, Gwan-Hyung,Yang, H.S. The Korean Society of Safety 2005 International Journal of Safety Vol.4 No.1
This study was conducted to identity the characteristics of occupational health and safety management systems around the world, to survey the implementation of OHSMS in Korean companies, to find problems and corrective measures, and to understand the opinions of top management about OHSMS. Questionnaires on the operation of occupational health and safety management systems in Korean manufacturing companies were carried out. Occupational health and safety management systems around the world, including OHSAS 18001, BS8800, KOSHA 18001, VPP, J-OHSMS, were reviewed. In order to implement an occupational health and safety management system successfully, it was found that the management should consider occupational health and safety as important, provide employees with necessary training, and have a strong commitment to occupational health and safety.
A taxonomic revision of <i>Allium</i> (Alliaceae) in the Canadian prairie provinces
Choi, Hyeok Jae,Cota-Sá,nchez, J. Hugo Canadian Science Publishing 2010 Botany Vol.88 No.9
<P> The taxonomy, rarity, and conservation status of Allium L. is revised for the Canadian prairie provinces, based on analyses of herbarium specimens and fieldwork. Five species are recognized: Allium schoenoprasum L., A. geyeri S. Watson var. tenerum M.E. Jones, A. textile A. Nelson & J.F. Macbride, A. cernuum Roth, and A. stellatum Ker Gawler. Distribution maps and a key to species are provided, as well as complete descriptions of the species examined, including new illustrations, information on nomenclatural types, synonymies, and chromosomal and ecological data. A lectotype is designated for A. geyeri var. tenerum. In this study, A. geyeri var. geyeri reported from Alberta and Saskatchewan and ranked in these provinces as having rarity levels S2 and S1, respectively, by the Nature Conservancy, is excluded from the Canadian flora and the rare list of these provinces because it was misidentified from a herbarium specimen of A. textile. Allium tricoccum Solander in W. Aiton is regarded as a non-native species to Manitoba. The rarity and conservation status of Allium in the Canadian prairie provinces is as follows: (i) A. schoenoprasum, listed as S2 in Saskatchewan, is rare in Manitoba, although its rarity status has not been formally assessed in the province; (ii) A. geyeri var. tenerum is the rarest Allium taxon, with distribution restricted to the Waterton Lakes National Park areas of Alberta, and is currently listed as S2; and (iii) A. cernuum was re-evaluated and a rarity level of S1S2 was recommended for the species in Saskatchewan, particularly in its southwestern distributional habitat. </P>
라미부딘과 HBIg 1주일 단기 병합요법은 간이식 후 B형 간염 재발 방지에 HBIg 장기 고용량 투여요법만큼 효과적인가?
김성주,장재권,이석구,도재혁,백승운,최문석,조재원,고광철,이풍렬,이종철,최규완,박상종,이준혁,김재준,임윤정,안병훈 대한소화기학회 2001 대한소화기학회지 Vol.37 No.1
Background/Aims : The aim of this study was to evaluate whether the regimen consisted of lamivudine and one-week HBIg for HBV prophylaxis after liver transplantation is as effective as long-term therapy of high dose HBIg. Methods: Sixty-one patients with HBV infection were randomly divided into two groups: HBIg group of 31 patients and combination group of 30 patients. In the HBIg group, HBIg was given according to the standard dosing schedule. In the combination group, lamivudine was given indefinitely from at least 4 weeks before transplantation, and 10,000 IU of HBIg was given during anhepatic phase and 6 consecutive days. Results: The two groups were not different in HBeAg and HBV DNA positivity. In the HBIg group, the median follow-up of 20 long-term survivors was 12.7 months (range: 4.0 - 48.2) and that of 23 survivors in the combination group was 22.3 months (4.2 - 42.2). Hepatitis B recurred in a patient of the HBIg group and 2 of the combination group. The recurrence-free survival rate of long-term survivors was 66.7% (95% C.I., 39.5% - 93.9%) in the HBIg group and 76.0% (58.6% - 93.4%) in the combination group after 40 months. Conclusions: The combined therapy of lamivudine and one-week HBIg has an effect equivalent to long-term therapy of high dose HBIg in HBV prophylaxis after liver transplantation at a much lower cost.
방향성 연속주조된 Al-Cu합금의 연화처리에 따른 미세조직과 기계적 성질의 변화
제창웅,윤재홍,정동석 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-
Directionally continuous casted Al-Cu alloys used the components of electronic and electric equipment need to specify the properties of them and optimum drawing condition in order to manufacture a fine wire. Therefore, the present investigation has been carried out for clarifying the changes of macrostructure, microstructure, mechanical properties, and the interrelations of them during annealing heat treatment in order to manufacture a fine wire in directionally continuous casted Al-Cu alloys. Recrystalized grains were not observed at below 200˚C in Al-1%Cu and Al-28%Cu alloys annealed, however recrystalized grains were observed with increasing annealing temperature. Recrystalization was occurred at inclusion/matrix interfaces and also appeared at the inclusions of smaller radius with increasing reduction ratio.
盧載榮,卞珠燮,孫錫龍,裵吉寬,申周植,柳承烈 충북대학교 엽연초연구소 1988 煙草硏究 Vol.13 No.-
Uniformity of the newly opened two experimental fields was evaluated to choosing a good experimentation technique. Field I was proved to be unavailable for the experimental purposes. Regular square or rectangle shape of plots extending north to south is recommended to make experimental plots in Field II. In case that the 10 percent margin of error using the mean value is equivalent to specifying the variance of the mean, five replications are required for four sqm plot, four replications for eight sqm, and three replications for 10 sq m or more.
가스터빈 블레이드 온도 특성 및 코팅층 건전성 평가를 위한 적외선 열화상 카메라 기법 활용
김재열,심재기,최승현,최진호 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-
Key part of main equipment in a gas turbine may be likely to be damaged due to operation under high temperature, high pressure, high-speed rotation, etc. Accordingly, the cost for maintenance increases and the damaged parts may cause generation to stop. The number of parts for maintenance also increases, but diagnostics technology for the maintenance actually does not catch up with the demand. Blades are made of precipitation hardening Ni superalloy IN738 and the like for keeping hot strength. The surface of a blade is thermal-sprayed, using powder with main compositions such as Ni, Cr, Al, etc. in order to inhibit hot oxidation. Conventional regular maintenance of the coating layer of a blade is made by FPI(Fluorescent Penetrant Inspection) and MTP(Magnetic Particle Testing). Such methods, however, are complicated and take long time and also require much cost. In this study, defect diagnostics were tested for the coating layer of an industrial gas turbine blade, using an infraredthermography camera. Since the infrared thermography method can check a temperature distribution on a wide range of area by means of non-contact, it can advantageously save expenses and time as compared to conventional test methods. For the infrared thermography method, however, thermo-load must be applied onto a tested specimen and it is difficult to quantify the measured data. To solve the problems, this essay includes description about producing a specimen of a gas turbine blade (bucket), applying thermo-load onto the produced specimen, photographing thermography images by an infrared thermography camera, analyzing the thermography images, and pre-testing for analyzing defects on the coating layer of the gas turbine blade.
김재중,김낙준 대한금속재료학회(대한금속학회) 2000 대한금속·재료학회지 Vol.38 No.6
The multiple-necking phenomenon and mechanism of reinforcement wires in AM60 Mg composites reinforced with AISI 304 wires has been investigated in the present study. AM60 Mg composite reinforced with AISI 304 wires exhibits ductility greater than the ductility of wire itself due to the occurrence of multiple-necking along the length of wire. As the volume fraction of AISI 304 wires decreases, the number of wire necking and the ductility of composites increase. It has been shown that the multiple-necking phenomenon is closely related to wires necking, interface reaction, and volume fraction of reinforcement. This phenomenon is also related to diameter of wires, strain rate, structure of metal, and interface strength. The multiple-necking results from local strain hardening of the matrix surrounding the neck, enabling the matrix to decrease neck growth by attraction force. Because multiple-necking plays an important role in the ductility and deformation behavior of composite, further works is needed to characterize the causes of this phenomenon in other metal/metal composites system.
배재학 울산대학교 2002 공학연구논문집 Vol.33 No.1
본 논문에서 구상한 문단기준 문서요약 방법론은 다음과 같은 절차로 구성되어 있다. (1) 문단의 문장들을 추상화시킨다, (2) 잔류 문장구성성분들의 문장간 개연적 연결상황을 확인한다, (3) 연결집중도가 상대적으로 높은 문장을 문단의 화제를 담고 있는 깃으로 인정한다. 이 중에서 본 논문에서는 문장추상화에 필요한 구문분석기와 온틀로지를 구체화하였고, 이 도구들을 설화문장 추상화에 활용하였다. The author proposes a paragraph-based methodology for text summarization, which has the following procedure: (1) applying sentence abstraction to a paragraph, (2) identifying abductive relationships between constituents of abstracted sentences, and (3) selecting a sentence whose connectivity degree is relatively high and taking it as a topic sentence of the paragraph Among these, in this paper an ontology and a syntactic parser for the abstraction are set up and applied to abstracting sentences in narratives.