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.

초음파 검사로 측정한 비장의 크기 : 한국인 성인남녀 100명을 대상으로

이명숙,유정현,서정수,이정식 梨花女子大學校 醫科大學 醫科學硏究所 1997 EMJ (Ewha medical journal) Vol.20 No.2

Purpose : Ultrasound has been found to be accurate, reliable and noninvasive method in the measurement of spleen. The study was undertaken to obtain standard values of size in three dimensions and normal range of splenic volume by the use of splenic volumetric index(SVI) in normal korean adults. Material and Method : We experienced 100 cases of abdominal ultrasonography of normal korean adults from May 1995 to August 1995. Results : 1) The average size of spleen in adult male was 6.85±1.31cm in breadth, 4.93±1.27cm in thickness, 6.33±1.46cm in height ; in adult females, 6.61±1.23cm, 5.17±1.26cm, 6.33. 42cm, respectively ; total average, 6.73±1,27cm, 5.05±1.27cm, 6.33±1.39cm,respectively. 2) The average splenic volumetric index in adult male was 8.20±3.95; in adult females, 8.41±4.08 ; total average,8.31±4.00. There were no statistical differences of SVI and size between sex and age. Conclusion : Although ultrasonography is less accurate than computed tomography, it is rapid and simple method for splenic measurement.

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.

QUAL2E 모형을 이용한 서해안개발사업에 따른 금강의 수질오염도 예측

이정식,이명훈,이재준 金烏工科大學校 1992 論文集 Vol.13 No.-

This study is to simulate the future water quality(BOD) of the Geum river by the development works in the west coastal area. The development works in the Geum river basin consist of 14 works including 4 industrial complexes, 1 agricultural development district and 9 agricultural-industrial areas. A simulation for predicting the future water quality of the Geum river from year 1996 to 2001 is performed by using the QUAL2E model. In this case the flow condition is assumed that the river maintenance water of main river is discharged 20㎡/sec from the Daechong dam and tributaries are maintained the 330-th daily flow in descending order. From the results of water quality simulation, the construction of wastewater treatment plants in the upper reaches of the Geum river was not effective enough to improve the water quality of downstream part below Buyo 1. It is necessary to construct more wastewater treatment plants in the lower reaches of the stream for improving the water quality of the Geum river.

웹 기반 공동주택 성능정보 전산화 방안 및 평가모델 개발에 관한 연구

이정남,이명식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

Today, people are getting information for housing through various medium. But, in spite of that necessity and haft of performance information of housing great, in domestic yet synthetic for performance information offer of housing and systematic computing system construction is not consisting. Therefore, wish to propose computing system construction and application model for Multi-Family Housing Performance Evaluation in this research. The MPE model allows an performance evaluation of Multi-Family Housing in three main categories: (1) location, (2) design, (3) performance. These three categories produce the ten 'Quality Indicators' that make up the MPE system. By presenting system construction of performance information and computerization of Multi-Family Housing Performance Evaluation in this research, wishes to secure efficient offer of performance information, objectivity and transparency and extend building performance assessment by working-level area.

완전혼합회분식 흡착반응기에서 단계별 선형화법을 이용한 유효확산계수의 추산

이성식,전성균,유명호 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

Values of intraparticle effective diffusivity, D_(e) were determined in a completely mixed batch reactor(CMBR) with the aid of the stepwise isotherm linearization for pyridine, 3-picoline and 4-picoline-domestic GAC system. For all systems, the pore diffusivity, D, could be obtained from D, with the paralled diffusion model and Neretnieks procedure. From the results, it became clear that the ratio of D_(p)/D_(AB) is almost constant, and the average ratio was about 3.44 of pyridine, 2.32 of 3-picoline, and 2.00 of 4-picoline. The values of tortuosity factor of domestic GAC was obtained as 1.99.

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.

부산지역 강하먼지 중 불용성 중금속 함유량

이용범,황용식,이창희,박명희,이채관,강동묵,김정원,전병일,문덕환 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.1

■ Objectives The purpose of this study was to estimate qualitatively various bulk deposition flux of insoluble heavy metal components by applying regional and seasonal distribution. our institution from January 1980 to December 31th, 2001. ■ Materials and Methods Dustfall particles were collected by the modified American dust jar (wide inlet bottle type) at 6 sampling sites in Pusan area from March, 1999 to February, 2000. Five chemical species (Cd, Cr, Mn, Ni and Pb) were analyzed by AAS(Perkin-Elmer 4100ZL). ■ Results The mean values of each heavy metal concentrations were Cd for 3.947 g/㎢/month, Cr for 0.191 ㎏/㎢/month, Mn for 0.375 ㎏/㎢/month, Ni for 0.176 ㎏/㎢/month, and Pb for 0.823 ㎏/㎢/month. ■ Conclusions Insoluble heavy metal amount of regional variations were found in order of industrial zone, coastal zone, commercial zone, agricultural zone and residential zone.

竝列處理技法에 依한 交通配分에서의 最短經路探索

이종달,도명식,이영욱 嶺南大學校 工業技術硏究所 1994 工業技術硏究所論文集 Vol.22 No.2

The objective of study is to introduce the shortest path searching algorithms and compare the efficiency(or speed) of the shortest path searching in traffic assignment between sequential method and parallel processing method. The main purpose of parallel processing is to perform computations faster than can be done with a single processor by using a number of processors concurrently. The research area is Daegu city. This study performed with the system as follows; IMS B008-1(Transputer motherboard with 4 TRAMs) and algorithm. It was written ANSI-C language. The result of elapsed running time with 3 TRAMs achived speed up of average 2.75 times(2.71∼2.84) compared with 1 TRAMs. If the hardware system could be composed with the configuration of Mesh or Hypercube architecture, study more efficient parallel algorithms, we can expect to make efficient use of memory, perform traffic phenomenon as a real time.