모 축전지 회사 근로자들의 연폭로 지표에 대한 경시적 관찰

강명식,김용배,이용진,리갑수,김화성,황규윤,장봉기,이성수,안규동,이병국 순천향대학교 산업의학연구소 1998 순천향산업의학 Vol.4 No.1

Lead poisoning is still prevalent and one of important occupational disease in Korea. To prevent undue high lead burden and maintain good health condition of lead workers in lead using industries, periodic health examination and regular biological monitoring of lead workers are often required in addition to the fundamental improvement of their working condition. To evaluate the effect of comprehensive occupational health program with regular biological monitoring on the level of lead exposure of lead workers in lead using industries, 11 year database from 1983 to 1994 of one storage battery factory was reviewed. From 1983 to end of 1986 only periodic health examination was provided to the lead workers, but from 1987 comprehensive occupational health program with regular biological monitoring was provided to maintain better health condition of lead workers. Selected study variables for lead exposure were blood lead(PbB), zinc protoporphyrin in blood(ZPP), δ-aminolevulinic acid in urine(ALAU), hemoglobin(Hb), hematocrit(HCT). Information on sex, age and work duration was also reviewed. 5 years data from 1983 to 1987 and 3 years data from 1990, 1993 and 1994 were available for all lead exposure indices except ALAU which has only 5 years data from 1983 to 1997. The results of 11 years longitudinal observation of lead indices are all follows: 1. The mean value of ZPP of lead workers in 1983 was 148.7±73.1 ㎍/㎗(Male: 145.5±72.3, Female: 168.1±79.1), whereas that of ZPP of lead workers in 1994 was decreased to 64.3±32.7 ㎍/㎗(Male: 60.2±28.8, Female: 95.2±43.4). 2. The mean value of PbB of lead workers in 1983 was 56.4±18.8 ㎍/㎗(Male: 55.59±19.1, Female: 59.6±19.1), whereas that of PbB of lead workers in 1994 was dcreased to 35.4±11.9 ㎍/㎗(Male: 35.7±12.0, Female: 32.8±10.8). 3. The mean value of Hb of lead workers in 1983 was 14.1±1.4 g/㎗(Male: 14.4±1.1, Female: 11.7±0.8), whereas that of Hb of lead workers in 1994 was increased to 15.6±1.5 g/㎗(Male: 15.9±1.2, Female: 12.9±1.1). 4. Blood lead is most highly correlated with ZPP(r=0.522, male:0.54 and female:0.50) and also correlated with ALAU and work duration also. 5. The simple regression analysis of PbB and ZPP showed different coefficient of regression by the measurement year, but there was no difference of coefficient of regression between sex. The slope of equation of pooled data for 1983-1986 without comprehensive occupational health program was 2.16 and differed from that of pooled data for 1987-1994(1.25). This difference suggests that the unit effect of blood lead on ZPP was relatively smaller in later period of comprehensive occupational health program than carly period without comprehensive program. The slope change in the analysis of linear regression of PbB on ZPP in lead workers can be used to evaluate the possible effect of health intervention to prevent undue high lead absorption in lead using industries. 6. 11 years occupational health service in this storage battery factory brought out considerable improvement of health status of lead workers in terms of decrease of PbB and ZPP and increase of Hb and the improvement was more remarkable after the introduction of comprehensive occupational health program.

경골과 골절에 대한 수술적 치료

조용만,박명식,강흥식,이건영,이천동,조규철 대한골절학회 1997 대한골절학회지 Vol.10 No.1

The tibial condylar fracture which involves articular surface of the proximal tibia is common in pedestrian injury of the traffic accident and often produces some disability of the knee joint because of the frequent association with ligamentous and meniscal injuries. Methods of treatment in fracture of the tibial condylas has long been a controversial problems. Recently most authors agree that the method of treatment has to be selected in each individual case and anatomical reduction of fracture and early knee motion are recommended but unsatisfactory results has been reported as between 20% and 40%. The authors analyzed 38 cases of the tibial condylar fractures, which were treated at the orthopedic department of the Lee-Rha general Hospital from 1990 to l994, regarding its type. treatment and results. The results of this study were as follows. l. According to Schatzker classification: the most common fracture was type II. 2. According to Blokker's criteria, 28 cases showed satisfactory results( 74% ). 3. Postoperatively, early knee joint exercise like alternatively applling 90( knee flexion and extension splint were very important factors for good results.

U형 프리캐스트 프리스트레스트 콘크리트 거더를 이용한 2경간 연속 교량구조의 개발을 위한 기초연구

이환우,김명식,김광양 釜慶大學校 1997 釜慶大學校 論文集 Vol.2 No.2

The current syudy is a part of esries of research about the development of new superstructure system to overcome the engineering problems in the design of bridges of 30m to 45m in span length using the existing bridge systems. The basic concept of new system in the continuation of adjacent two simple spans composed of the precast prestressed concrete U-type sections. The partial post tensioning method is applied to create the contimuity. In this stdy, the new technique was introduced and applied with an example design of two span of 40m in span lemgth to find the possibility for pratival applicatio as a feasibility syudy. The obtained results show that the new splicing method is expected to offer significant economical and serviceability advantages.

중소건축설계 사무소를 위한 웹기반 협업시스템 구축 방안

이명식 東國大學敎 産業技術硏究院 2005 산업기술논문집 Vol.15 No.1

This paper presents a state of the art review of various researches and applications on collaborative design systems. From the review we intended to understand current technical fruits and emerging issues on both researches and commercial applications. The purpose of this paper is not to develop any collaborative design systems but to give a insight of design-construction ICT edges to small and medium sized architect's offices. A general classification matrix is proposed to briefly outline the collaborative design systems. At the end we discuss what the architect's offices would do for preparing kaleidoscopic information age. There are technical-pulled and market-pushed forces to introduce architectural design practices, the collaborative design system. In the first place a proper commercial system would be selected and turn into practical use for project management. The system should support data(file) sharing, on-line file transaction, available groupware, and recommended web-based. In parallel the shift of legacy CAD to object-based parametric CAD would be accepted smoothly in small and medium sized offices. Politics such as division of modeling works by CAD system, rules of data handling, and layer coordination etc. would be established in advance when the office decides to use object-based CAD systems.

선형 시변 시스템의 웨이브렛 망 근사화와 가중치 학습

이영석,이인수,김명식 金烏工科大學校 1997 論文集 Vol.18 No.-

This paper discusses approximation modeling of discrete-time linear time-varying system(LTVS). The wavelet transform is considered as a tool for representing and approximating a LTVS. The joint time-frequency properties of wave analysis are appropriate for describing the LTVS. Simulation results are included to illustrate the potential application of the technique.

개에 있어서 유선 종양의 1례

이시예,정성목,박창식,김명철 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

A 6-years-old 2.5kg female maltese dog with history of multiple mass around mammary gland was referred to Veterinary Medical Teaching Hospital, Chungnam National University. There was no evidence of metastasis in survey radiograph. Cytological finding revealed cell crumps of linear structures of epithelial cell origins. Histopathological finding revealed fibrous stroma, myxomatous lesion, catilagenous metaplasia, hyperplasia of lobular alveoli and ductules. Mass was removed by total mastectomy. After surgery, CBC values showed mild anemia, neutropenia and lymphocytosis. General condition was good. For the appropriate evaluation, more periodical and continuous monitoring is needed.

습식 합성법을 이용한 CaTiO₃의 합성

이경희,소대화,이병하,김명식 明知大學校 産業技術硏究所 1987 産業技術硏究所論文集 Vol.6 No.1

It is desirable to establish reliable synthetic methods for perovskite type ceramics. To prepare CaTiO₃ in this study oxalated method, Co-precitation method and direct-wet process method was used. In oxalated method the reaction of CaCl₂ and TiCl₄at oxalic acid ammonia solution produced calcium - Titanyl oxalate. For the power preparations, the addition of NH₄OH solution has a important meaning that the component elements can be precipitated completely. The 900℃ calcined CaTiO₃ powders was pressed under 300 ㎏/㎠ into disk 15mm in diameter and 2mm thickness and then pressed hydrostatically under 500㎏/㎠. These powder compacts were sintered from 1100℃ to 1300℃ for 2hrs. The apparent density and dielectric constant were measured. The apparent densities were in the range of 90 ∼ 95% and dielectric constant was 180. Zn Co-precipitation method of CaCl₂ and TiCi₄ at (NH₄)₂CO₃ and NH₄ OH solution product CaTiO₃ and Ti(OH)₄ gel. As final synthetic method, direct - wet process was applied to form CaTiO₃.

중단자료를 갖는 스트레스-스트렝스 관련성으로부터 시스템 신뢰도 추정

이명이,조장식 慶星大學校 1999 論文集 Vol.20 No.2

In this paper, we estimate the reliability of parallel system with two components under random censorship. We assume that strengths of these components follow Marshall-Olkin's bivariate exponential model and that these two components are subjected to a common stress which is independent of the strength of the component. We obtain the maximum likelihood estimator for the system reliability and the asymptotic normal distribution of the estimator. Also, we present a numerical study for obtaining MLE of the system reliability when the common stress is exponentially distributed.

무 種子의 發芽와 生育에 미치는 産性비의 影響

이재석,최명자,정재식,이영선 대구효성가톨릭대학교 응용과학연구소 1997 응용과학연구논문집 Vol.6 No.1

황산과 질산을 3:1용량비율(V/V)로 혼합한 인공산성비(pH 2.0∼pH 4.0)처리가 무(Raphanus sativus L.) 종자의 발아, 유근과 배축의 생장, 세근, 근모의 발생 등에 미치는 영향을 조사하여 얻은 결과는 다음과 같다. 1. 종자의 발아율과 발아세는 대조구(pH 6.3)에 비하여 pH 3.0과 pH 4.0은 비슷한 경향이었으나, pH 2.0은 발아가 지연되고 불균일하였으며, pH 1.0은 전혀 발아가 되지 않았다. 2. 유근과 배축의 생장은 대조구(pH 6.3)에 비하여 pH 3.0과 pH 4.0은 차이가 없었으나, pH 2.0은 극히 불량하였으며 산성비는 배축보다 유근의 신장을 더 저해시켰다. 3. pH 2.0의 산성비는 치상후 3일째부터 유근과 배축이 서서히 굽어지고 세근과 근모가 전혀 발생되지 않았다. 4. pH 2.0의 산성비는 6일째부터 유근이 누렇게 되고 자엽이 연녹색으로 변색되었으며 엽록소가 거의 생성되지 않았다. 5. 산성이 강한 용액일수록 자엽, 배축, 유근 등의 조직이 일찍 물러지고 괴사되는 현상이 나타났다. The effects of acid rain on the germination, and growth of radical and hypocotyl of radish are studied. The inhibition effect of simulated acid rain of pH3.0 and pH4.0 on seed germination was not significant as compared to control treatment(pH6.3), while that pH2.0 reduced both germination rate and germination speed significantly. No seed germination was observed in the group treated with pH1.0. Growth of radical and hypocotyl of the seedlings treated with pH3.0 and pH4.0 was not inhibited when compared to that of control group(pH 6.3). Growth of radical and hypocotyl of the seedlings treated with pH2.0 was severly inhibited which resulted in gradual abnormal hypocotyl bending. Forthmore, no fine roots and root hairs were formed on these seedlings. Simulated acid rain of pH2.0 cused radicle chlorosis, and decolorization of cotylendons to pale green which might has been due to lack of chlorophyll synthesis.

전산설계도서 표준운용체계 연구

이명식 대한건축학회 2003 대한건축학회논문집 Vol.19 No.1

This paper aims to build the standard working system of electronic design documents. It is willing to build an integrated standard working system of construction documentations and drawings for information sharing, consistent and efficient management. To achieve this purpose, the practical cases of construction work process and information system for the improvement categories and construction CALS structure are examined. A schematic standard working system for the consistent and efficient information exchange of construction documentations and drawings in the real practice is proposed. The proposed standard working system is that the electronic design documents can be systemized in three structure of working process, information technology, system operation as construction CALS structure. The expected effect of the proposed system is that the electronic design documents can be managed, shared and recycled through construction work process. The further detail standard working items and categories for electronic design documents information and knowledge must be studied on the basis of this study.