8년간(1992~1999) 산업안전보건연구원에 의뢰된 직업병 심의 사례 분석

강성규,김규상,김양호,최정근,안연순,진영우,최병순,양정선,김은아,채창호,최용휴,김대성,박정선,정호근 대한산업의학회 2000 대한직업환경의학회지 Vol.12 No.2

Objectives : Pneumoconisis and noise-induced hearing loss (NIHL) have been reported as main occupational diseases by the Special Health Examination. The Industrial Accident Compensation Insurance has reported various work-related diseases, however, these two diseases occupied almost a half of compensated cases. Therefore, it was not well known about the status of occupational diseases other than pneumoconiosis, NIHL, and cardio-cerebrovascular accident (CVA). This study was conducted to analyze claimed cases as an occupational disease, that was requested to the Korea Industrial Safety and Health Agency (KOSHA). Methods : The local office of the Korea Labor Welfare Corporation (KLWC) has asked the KOSHA for confirmation of claimed cases as an occupational disease. We analyzed 379 cases requested from KLWC, the Ministry of Labor, employers, unions and occupational health agencies from 1992 to 1999. Results : Male was 80.7 % of the requested cases. Their mean age was 42 years old and 75.5 % of them were more than 35 years old. The requested cases were increased rapidly from 25 cases in 1992 to 108 cases in 1999 and the accept rate was 50.7 %. The majority of requested cases were respiratory diseases(22.4%), cancers(18.5%), Neuropsychiatric problems(14.5%), and musculoskeletal problems(13.5%). The accept rate was high in reproductive, respiratory, musculoskeletal and digestive disorders and low in neuropsychiatric, renal and otologic problems and occupational cancers. 73.6% of them were caused by chemical agents, especially 28.5 % were by organic solvents. 67% of them were clinically confirmed at university hospitals. A half of the cases were from KyongIn area, even the request came from the whole country. Conclusions : A claim was common in workers whose age was over 35 years old and exposure history was over 10 years. The respiratory diseases and neuropsychiatric disorders were still main problems in occupational health and occupational cancers was increasing even though its accept rate was not high yet.

약관절강내 천자술시 히알루산(Hyaluronic acid) 사용에 대한 임상적 연구

권병곤,김재승,여환호 大韓顎顔面成形再建外科學會 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.4

To compare the effect of hyaluronate and dexamethasone on the temporomandibular joint arthrocentesis the author investigated 22 temporomandibular joint disorder(TMD) patients with pain and limitation of mouth opening who visited at the Department of Oral and Maxillofacial Surgery. Chosun Dental Hospital and were made a diagnosis as Wilkes stage Ⅲ or Ⅳ of TMJ internal derangement clinically and radiographically. The two groups consisted of 10 patients with injection of sodium hyaluronte 10mg(Artz)(hyaluronate group) on the upper joint space of the affected temporomandibular joint 5 times at intervals of a week after arthrocentesis, and 12 patients with injection of dexamethasone(Oradexon) at a time(dexamethasone group). Maximum mouth opening, pain value and satisfaction value during mastication were assessed on a visual analog scale before arthrocentesis and after 6 months. Then the within-group and between-group differences were evaluated in the obtained data and the clinical success rate of each group was calculated according to our success criteria. The results were as follows. 1. the mean of maximum mouth opening before arthrocentesis and after 6 months in the hyaluronate group were 24.9mm and 39.0mm respectively, and those before arthrocentesis and after 6 months in the dexamethasone group were 25.7mm and 41.3mm respectively. 2. The mean of pain value on a visual analog scale in the hyaluronate group before arthrocentesis and after 6 months were 6.7 and 1.8 respectively, and those in the dexamethasone group before arthrocentesis and after 6 months were 7.0 and 1.8 respectively. 3. The mean of satisfaction value during mastication on a visual analog scale in the hyaluronate group before arthrocentesis and after 6 months were 2.8 and 7.7 respectively, and those in the dexamethasone group before arthrocentesis and after 6 months were 3.1 and 7.8 respectively. 4. There were statistically significant differences between all meansurements before arthrocentesis and after 6 months(P<0.001), but no difference between all meansurements in the hyaluronate group and those in the dexamethasone group. 5. The over all success rate of the hyaluronate group and the dexamethasone group were 60.0% and 63.6% respectively. In summary, there was significant difference between the effect of hyaluronate and dexamethasone on the temporomandibular joint arthrocentesis but hyaluronate is better than corticosteroid as the injection drug in consideration of the side effect related with repeated injection.

구멍밤고둥, Chlorostoma argrostoma turbinata의 생식주기에 관한 연구

김병호,최광식,이영돈 제주대학교 해양연구소 1996 해양자원연구소연구보고 Vol.20 No.-

Reproductive cycle of the top shell, Chlorostoma argrostoma turbimta was investigated histologically to know it's gonadal development using gonadosomatic index(GS1). Samples were collected at the coastal area of Hamdok in Cheju-Do from Nobember, 1994 to September, 1995. 1. Chlorostoma argrostoma turbinata appeared to be dioecious, and neither sex reversal nor hermaphrodi-tic. The sex ratio was approximately 1:1. 2. The gonad was located on the surface of the liver in the posterior spiral meat part of the shell. 3. In male and female. GSI began to increase from April when water temperature began to increase and reached it's maximum value in August. It began to decrease September thereafter, maintained relatively low value until January. 4. The annual reproductive cycle of this species could be classified into five successive developmental stage ; multiplication stasge, growing stage, mature stage, spent stage, degenerative and recovery stage. 5. In male and female, spawning time were from March to December but, main spawing time were September.

공급체인관리하에서 퍼지이론을 이용한 효율적인 협력업체 선정에 관한 연구

김진호,이병기 한국경영과학회 2003 한국경영과학회 학술대회논문집 Vol.- No.1(1)

공급체인관리(SCM)에서, 고객의 반응에 민감하게 반응할 수 있기 위해서는 무엇보다도 부품이나 자재를 공급하는 협력업체의 능력이 중요한 요인으로 작용한다. 본 논문은 퍼지이론을 이용하여 과학적이고 효율적으로 협력업체를 평가하고, 우수협력업체를 선정하는데 있다. 협력업체의 평가를 위하여 여러 가지 요인을 분석하여야 하는데, 그런 요인들 중에는 수치적으로 표현 가능한 정량적인 요인이 있는 반면에, 협력업체 제품의 품질이나 재정적 상태와 같은 수치적으로 표현 불가능한 정성적인 요인도 포함되어 있다. 본 논문에서는 정량적인요인과 정성적인 요인을 퍼지추론(Fuzzy Inference)을 통해 분석함으로써 협력업체를 평가하고 최우수 협력업체를 선정하여, SCM환경에서 성공적인 협력관계를 지속적으로 유지할 수 있는 방법론을 제시하고자 한다.

고능률 소형 전자석에 의한 자왜 및 자기이방성 측정

이용호,신용돌,김병걸,민복기,송재성 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.17 No.-

자왜 또는 자기이방성의 측정에 사용되는 전사석의 여자전류를 측정에 필요한 수초간만 흘려서 에너지 소모 및 측정시의 최대난점인 시료의 온도변화의 문제를 극소화하였다. 따라서 전자석의 냉각장치는 생략되고 크기와 전원의 용량도 극소화되었다. 공기간격 22㎜, 자극의 단면적 40 × 25㎟에서 0.5 T의 자장발생에는 180 W의 전원으로 족하였다. 시료의 자왜와, 자기이방성에 의한 토크를 전기용량센서에 의하여 측정하여 10^-8의 자왜분해능과 1 nJ의 토크 분해능을 얻었다. 0.02× 0.8× 10㎟의 연자성 리본의 형상이방성을 이용하여 이방성 측정시의 토크값을 교정하였다. A high efficiency small electromagnet(22㎜ air gap and 40 × 25㎟ core's cross section) suitable for measuring magnetostriction and magnetic anisotropy was built. The magnet could be miniaturized by reducing the measuring space and time. The excitation current of the electromagnet was supplied for only a few second of small. An 0.5 T magnetic field was generated with 180 W power consumption. The values of magnetostriction and magnetic anisotropy were measured with a very sensitive capacitance cell with resolution of 10^-8 and 1 no. The torque was calibrated using a soft magnetic ribbon's shape anisotropy.

리스크 영향을 반영한 공기산정 방식에 관한 연구 : Fuzzy Set 이론 적용기법

옥종호,오병석 서울産業大學校 2005 논문집 Vol.54 No.2

Risk and uncertainty are inherent in all construction projects. Appropriately determining a project schedule under risk and uncertainty is one of the most important factors in a contractor's succeess on a project. However, when the likelihood of inccurring risk events and the risk-associated consequences (schedule overrun or schedule reduction) is uncertain, contractors face difficulties in estimating a project duration. While the Critical Path Method (CPM) has been widely used in scheduling a project, it is frequently criticized because (1) CPM assumes that an activity's duration can be estimated with certainty and (2) in consequence, CPM cannot reflect the project risk and uncertainty in schedule estimation. The main objective of this paper is to present a schedule risk quantification method for estimating a risk-associated activity's duration. The uncertainty in the quantified risk consequences (activity duration loss or gain) is accounted for by using a fuzzy set approach. A numerical example is presented to show how the method can be put into practice and how suitable it is in measuring risk-associated activity duration.

Al系 軸受合金에 對하여

李重鎬,李炳直 釜山工業大學校 1969 論文集 Vol.8 No.-

變斷面 圓弧아-치의 數値解析에 관한 硏究

朴文浩,李炳求 東亞大學校 大學院 1979 大學院論文集 Vol.3 No.-

The governing differential equations for the hinged-tapered circular arch have been derived, and a numerical procedure for the solution of these equations have been developed. The governing differential equations were solved numerically by an initial value integration procedure and Shooting methods for boundary value problems. The Runge-Kutta integration technique was used. The numerical solution was made through a Cyber 73-18 computer. A numerical example for a hinged-tapered circular arch with a half central angle of 0.7 radian were solved, and the results were compared with that of a fixed-tapered circula arch. The results of this study can be utilized to determinate the deflections, angle of slope, bending moments and torsional moment of thin and long hinged-tapered circular arch design.

LES와 AIDS를 중심으로 한 食品需要模型硏究

金柄鎬 建國大學校 附設 自然科學硏究所 1992 建國自然科學硏究誌 Vol.3 No.-

반도체 폐 Si 슬러지를 이용한 질화규소세라믹의 제조

이병택,김해두,유정호 공주대학교 자원재활용 신소재 연구센터 1999 1차년도 센터 성과집 Vol.1999 No.-

반도체 폐 Si슬러지를 이용하여 질화반응 및 post-sintering을 통해 제조된 질화규소세라믹의 미세조직 및 기계적 특성을 광학현미경, SEM 및 XRD를 이용하여 연구하였다. 상당량의 SiO₂비정질상을 포함하는 폐 Si분말에서 많은 microcracka이 관찰되었다. 폐 슬러지를 사용한 Si 성형체의 질화율은 상용되고 있는 Si분말을 이용한 성형체의 값에 비해 낮은 값을 보였다. 그러나 질화온도가 증가함에 따라 질화율은 증가하였으며 1470℃에서 질화율은 98%를 보였다. 반응소결체내에 존재하는 Si₁N₄의 결정은 α와 β상으로 혼재되어 있으며 상당량의 산질화규소상이 검출되었다. 1950℃에서 후처리된 시료의 최대파괴인성 및 파괴강도 값은 각각 5.6 MPa로 MPa로 H. C. Starcktk사의 Si을 이용한것에 비해 낮은 값을 보였으며 이는 산질화규소 형성에 기인된 것으로 사료된다. The microstructures and mechanical properties of Si₁N₄ceramics produced by nitridation and post-sintering using semiconductor-waster-SI sludge were investigated. Lots of microcracks were observed in the waste-Si powders which contained some amounts of amounts of amorphous SiO₂. The nitridation rate of waste-Si compacts showed lower value than that of commercial Si powder compacts. The nitridation rate was increased with increasing nitridation tempera ture and then the percent of nitridation at 1470℃ showed 98%. The phases of Si₁N₄in the reaction-bonded bodies were mixed wit αand β-type, and small amounts of Si₂N₂phase while those after post-sintering were β-Si₁N₄and α-Sialon. The sample post-sintered at 1950℃ showed the fracture toughness of 5.6 MPaㆍm1/2 and the fracture strength of 497 MPa which were lower than those of sintered body using commercial Si powder possibly dur to the for-mation of α-Sialon phase.