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VDT작업별 정신사회적 스트레스와 근골격계 장애에 관한 연구
백남종,강종두,주영수,배인근,권호장,박종만,조수헌,김돈규,김재용,최홍렬 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.4
It has been hypothesized that jobs that have both high psychological demands and low decision latitude("job strain") can lead to musculoskeletal disorder. The objective of this study was to test whether job strain was correlated with the presence of work-related musculoskeletal disorder, especially myofascial pain syndrome(MPS). Information on demographic factors, confounders such as household load and taking care of children or not, and scores for decision latitude, job demand, and social support was obtained by self-administered questionnaire, which had been developed in Korean language, by adopting NIOSH instrument and Extended Karasek Model(16 items). All subjects were also examined by rehabilitation medicine specialists for musculoskeletal disorders. Subjects(n=370) could be categorized into 4 groups, these were, housewives(n=89), shipyard CAD workers(n=89), general female workers(n=79; nurses, insurance counselors, public officials, clerks, etc), and telephone directory assistance operators(n=113). Results from univariate analyses indicated that all demographic factors, all confounders, scores for decision latitude and social support were not associated with the risk of musculoskeletal disorder. However, score for job demand was higher in musculoskeletal disorder cases than others. In subgroup analysis, this association was convinced again, in telephone directory assistance operators. Job strain model showed that the group of telephone directory assistance operators was high-stain group, and OR of musculo skeletal disorder was 2.446(95% C. I. : 1.174, 5.096), when comparing this with the low strain group. In conclusion, job strain is a risk factor for work-related musculoskeletal disorder.
신종익,이정한,송한범,강대언,오상훈,차승렬,이용재,김상대,이원호 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
This study investigates the performance of the reinforced concrete frame with the steel plate slit damper. The test was carried out to investigate the structural behavior between the reinforced concrete bare frame and the reinforced concrete frame with the steel plate slit damper. The test results showed that the energy absorption capacity of the damped-frame was several times larger than that of the bare frame. For the damage by the input energy is concentrated on the steel plate slit damper, the ductilities of the former structure were increased and the damaged frame can be reused after exchange the steel plate slit damper.
뇌·심혈관계 질환의 업무상 재해 인정 여부에 영향을 미치는 요인
원종욱,하국환,송재석,노재훈,김형렬,이대희,이강희 大韓産業醫學會 2003 대한직업환경의학회지 Vol.15 No.1
목적: 본 연구는 뇌·심혈관질환으로 요양 신청한 근로자들에게서 업무상 질병 인정 여부에 영향을 주는 요인을 파악하고, 이들의 특성을 분석하여 뇌·심혈관질환 예방에 도움을 주고자 한다. 방법: 1998년과 1999년 경인지역 3개 근로복지공단에 뇌·심혈관질환으로 요양신청한 386명 가운데 분석 가능한 369명을 연구대상으로 하였다. 재해조사 복명서를 기초로 하여, 일반적특성, 재해 관련 특성 및 과거병력을 조사하였으며, 업무상 질병 인정여부에 영향을 주는 요인을 알아보기 위하여 로지스틱 회귀분석을 실시하였다. 생존자 96명중 전화 면접 조사가 가능했던 72명을 대상으로 직무 스트레스관련 요인을 조사하였다. 직무 스트레스는 업무요구도, 지적 결정권 및 개인적 시간의 자유도로 나누어 조사하였다. 결과: 369명 가운데 167명이 업무상 질병으로 인정받았으며, 인정 여부와 무관하게 연구대상자 가운데 62%가 한가지 이상의 뇌·심혈관계 질환의 위험요인인 질병을 갖고 있었다. 특히 고혈압은 전체 연구대상자의 53.9%에게 존재하였다. 인정 여부를 종속변수로 한 로지스틱 회구분석 결과 사망하여 요양 신청한 경우가 생존한 경우보다 요양 승인의 비차비가 26.5로 요양이 승인될 가능성이 높았다. 작업조건의 변화가 있는 경우는 6.5배, 작업장에서 발생한 경우는 4.9배, 여자는 남자보다 4배, 야간 작업이 있었던 경우는 2.9배, 근무시간 중 발생한 경우 2.5배 그리고 과거력상 뇌·심혈관계 질환 관련 병력이 없는 경우는 그렇지 않은 경우보다 1.8배 더 많은 요양 승인을 받았다. 전화 면접을 통한 직무스트레스를 조사한 결과 개인적 시간의 자유도가 낮을수록 업무상질병 인정을 더 많이 받았지만, 로지스틱 회귀 분석 결과 직무 스트레스는 업무상 질병 인정에 아무런 영향을 주지 못했다. 결론: 뇌·심혈관질환을 예방하기 위해서는 위험요인 가운데 가장 많은 비중을 차지하고 있는 고혈압을 관리하는 것이 필요하고, 업무상 질병 여부를 판단하는데 있어 보다 객관성을 유지하기 위해서는 과로나 스트레스에 좀더 큰 비중을 두어야 한다. Objectives: This study was performed to analyze the factors that affect the decision to approve workers compensation claims for cerebrovascular and cardiovascular diseases and to analyze the worker characteristics. Methods: Three hundred, sixty-nine cases were collected based on the workers compensation records of three Seoul and Incheon Regional centers of the Labor Welfare Corporation between 1998 and 1999. They contained the general characteristics, injury information and past medical histories. The x2-test and logistic regression were performed to investigate the factors affecting the approvals. Seventy-two survivors were surveyed by telephone for job stress. Job stress was surveyed in three parts: job demands, decision latitude and personal free time. Results: Of the cases, 167 obtained approval from the Corporation; the others did not. Regardless of approval, 62% of all subjects had more than one of the cerebral and cardiovascular risk factors. Especially, 53.9% of subjects had hypertension. Accordings to the logistic regression, the fatal cases had a higher approval rate (OR=26.4, CI=9.13-76.22). The cases with working condition change (OR=6.5, CI=3.45-12.07), accidents on worksite (OR=4.9, CI=2.39-10.07), female (OR=4.0, CI=1.21-13.3), accidents at night duty (OR=2.9, CI=.156-5.39), cases occurring on duty (OR=.25, CI=1.34-4.72) and cases without past diseases history (OR=1.8, CI=1.02-3.36) also had higher approval rates. Telephone survey found that the approval rate increased with decreasing freedom of personal time schedule. However, the logistic regression revealed that job stress didnt affect the approvals. Conclusion: To prevent cerebrovascular and cardiovascular diseases, the most important aspect is to control hypertension which is the most common risk factor among the victims. Moreover, job stress and over working should be considered in the just approval of the workers compensation claims.
Canine juvenile cellulites의 진단과 치료 증례
황철용,유종현,강형석,윤화영,한홍율 한국임상수의학회 2002 한국임상수의학회지 Vol.19 No.4
Canine Juvenile cellulitis was diagnosed in 2 puppies hospitalized in Veterinary Medical Teaching Hospital of Seoul National University. Characterized dermatological problems were presents of scale, crust, purlent exudation and alopecia limited on their face. On cytologic examinations of direct impression smears for the lesions, numerous neutrophils and macrophagies were observed. No bacteria and fungus were noted. Treatments with administration of predinisolone and antibiotic orally combined with topical shampoo treatment had good results for the two puppies.
Kim, Jong-Hak,Min, Byoung-Ryul,Kim, Yong-Woo,Kang, Sang-Wook,Won, Jong-Ok,Kang, Yong-Soo The Polymer Society of Korea 2007 Macromolecular Research Vol.15 No.4
Novel composite membranes, which delivered high separation performance for propylene/propane mixtures, were developed by coating inert poly(ethylene-co-propylene) rubber (EPR) onto a porous polyester substrate, followed by the physical distribution of $AgBF_4$. Scanning electron microscopy-wavelength dispersive spectrometer (SEM-WDS) revealed that silver salts were uniformly distributed in the EPR layer. The physical dispersion of the silver salts in the inert polymer matrix, without specific interaction, was characterized by FT-IR and FT-Raman spectroscopy. The high separation performance was presumed to stem from the in-situ dissolution of crystalline silver ionic aggregates into free silver ions, which acted as an active propylene carrier within a propylene environment, leading to facilitated propylene transport through the membranes. The membranes were functional at all silver loading levels, exhibiting an unusually low threshold carrier concentration (less than 0.06 of silver weight fraction). The separation properties of these membranes, i.e. the mixed gas selectivity of propylene/propane ${\sim}55$ and mixed gas permeance ${\sim}7$ GPU, were stable for several days.
Kang, So-Hyun,Jella, Venkatraju,Pammi, S.V.N.,Eom, Ji-Ho,Choi, Jin-Seok,Jeong, Jong-Ryul,Yoon, Soon-Gil ELSEVIER 2017 CURRENT APPLIED PHYSICS Vol.17 No.5
<P>Tuning the structure and chemical composition of 03 gm-thick Ge2Sb2Te5 (GST) films via control of the deposition temperature enhanced thermoelectric performance by balancing the Seebeck coefficient, the electrical conductivity, and the thermal conductivity. By combining the phases of the face-centered cubic (FCC) and hexagonal close packed (HCP) crystal structures of GST thin films deposited at 250 degrees C, a compromise was attained between a moderate degree of electrical conductivity and the Seebeck coefficient, which resulted in the highest power factor at 1.1 x 10(-3) W/K(2)m. This was attributed to variations in the effective mass, the mixed crystal structure, and the chemical composition with deposition temperature. The highest maximum powers of 03 mu m- and 1.0 mu m-thick n-Bi2Te3 (BT) and p-GST thermoelectric generators with 5 p/n couples were approximately 4.1 and 52.9 nW at Delta T = 12 K, respectively. They showed higher maximum powers than those of referenced n-BT and p-Bi0.5Sb1.5Te3 (BST) thermoelectric generators. (C) 2017 Elsevier B.V. All rights reserved.</P>