자동차용 증발기 설치 위치에 따른 유동장 해석

任孝宰,鄭德秀,李錫鎬 湖西大學校工業技術硏究所 1999 工業技術硏究所論文集 Vol.18 No.-

This work was conducted to study the distribution of velocity field in the inlet region of evaporator for automobile HVAC(Heating, Ventilation, and Air Conditioning). By experimental and numerical simulation method, we found out that the installation position of evaporator in cool air blowing system had optimal value. Also, the porous media assumption of evaporator in computational domain assured to valid when compared with experimental results. Finally, the diffusing scroll which proved to be very efficient and silent by experimentally.

철강업체와 용접봉 제조업체에 근무하는 생산직 근로자의 직업성 요통 유병률과 관련 요인

임현술,김수근,김덕수,김두희,이종민,김양호 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.1

A cross-sectional study was conducted for detecting the risk factors and to propose an effective control program for occupational low back pain. The subjects were 1,665 male production workers employed at a steel factory and a welding material manufacturing factory. The data were collected by a self-reported questionnaire and a medical examination with a rehabilitation specialist for ten days in September, 1997. The contents of the questionnaire were as follows: general characteristics, physical characteristics, employment status, type of work, working environment and the experience of low back pain. The number of cases with symptoms of occupational low back pain were 321, so the point prevalence was 19.3 persons/100 persons. The number of cases with a history of occupational low back pain for one year were 554, so the one year period prevalence was 33.3 persons/100 persons. The point and one year period prevalences of occupational low back pain showed no significant differences in age, marital status, educational level and body mass index. The point and one year period prevalences of occupational low back pain showed no significant differences in alcohol drinking, smoking, stretching exercise and regular exercise. The point and one year period prevalences of occupational low back pain were significantly higher in the unsatisfied group that the satisfied group (p<0.01). However, no significant differences were found among tenures and shift work. The point and one year period prevalences of occupational low back pain were significantly higher in the lifting of heavy materials group than the nonlifting group(p<0.01). However, no significant differences were found among posture of the waist and the working posture. Through the multivariate logistic regression, significantly associated factors with occupational low back pain were found to be dissatisfaction with job (point prevalence: OR=1.78, 95% CI: 1.21-2.61: one year prevalence : OR=1.76, 95% CI: 1.26-2.47), lifting of heavy materials(point prevalence OR=1.94 95% CI : 1.44-2.61; one year prevalence: OR=2.17, 95% CI : 1.70-2.77) and tenure (point prevalence : OR=1.03, 95% CI : 1.01-1.06; one year prevalence : OR=1.02, 95% CI : 1.00-1.05).

채용시 건강진단에서 요ㆍ천추부 단순 방사선 검사의 평가

임현술,김수군,김덕수,이현경,최대섭 대한산업의학회 2000 대한직업환경의학회지 Vol.12 No.2

Objectives : A study was conducted for investigating the status of simple X-rays on lumbo-sacral regions at pre-employment health examination and analysing the effectiveness of simple X-rays on lumbo-sacral regions. Methods : The study data were pre-employment health examination data in a university hospital from Jan 3, 1993 through October of 1997. And, 97 newly employed workers who claimed no low back pawn at pre-employment health examination of a certain company were follow-up survey about low back pain and related factors in April, 1995 and October of 1997. The data were collected by a self-reported questionnaire and a medical examination with a rehabilitation specialist. Results : 1. Taking the simple X-rays on lumbo-sacral regions was 1,591 workers (10.5%) among 15,166 pre-employment health examination from Jan 3, 1993 through October of 1997. And yearly application rates of these X-ray tests have been significantly statistical increasing (p〈0.01). 2. The abnormal findings of simple X-rays on lumbo-sacral regions at pre-employment health examination were 40 workers. But, there was not significantly statistical difference between normal and abnormal group for the complaint rate of low back pain. 3. The number of case with symptoms of low back pain at the follow-up survey were 46, so The incidence density was 37.1 persons/ 100 person-years. And the incidence density was not significantly statistical difference between normal and abnormal group of simple X-rays on lumbo-sacral regions. 4. Through the multivariate logistic regression, significantly associated factors with low back Pain were found to be tenure(OR=0.36, 95%CI : 0.17-0.79), lifting of heavy materials (OR=5.86, 95%CI : 1.58-21.74) . Conclusion : The simple X-rays on lumbo-sacral regions at pre-employment health examination is required further research for utilizing pre-employment health examination according to above results.

고등학교 체육수업에서의 수행평가 적용상 문제점 분석

김이수,김평석,류수림,노덕선 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

This study aims to understand and analyze problems on applying performance assessment to physical education in high school, and to offer basic data to seek for measures to settle performance assessment in physical education. The specific themes are, first, we analyze the present condition of reflection of the assessment in physical training. knowledge. and attitude in physical education. Second. we analyze teachers' implementation of performance assessment. Third, we compare the recognition of performance assessment according to students' gender. Fourth, we compare the recognition of performance assessment according to the type of schools. For the research, twelve high schools in the Metropolitan area were randomly selected, and 50 physical education teachers and 305 high school students in third grade were polled. Collected data from teachers were classified by type after frequency study. and the data from the students were analyzed in terms of frequency. by the means of Independent T-test for verification of average deviation between male and female students and by means of one-way ANOVA for analysis of school type-related results. When there was any significant difference among groups, Tukey method was applied for the aftermath verification. The results are as follows. First, the reflection rate of assessment on physical training. knowledge and attitude in physical education was found to be 60: 30: 10. Second, teachers implement physical training assessment mostly in two sports per semester. Most teachers assess focusing on the record (the number of times), and implement the assessment twice per each sport. Classroom assessment and assignment assessment are implemented if required. As for exam questions for knowledge assessment. most teachers gave only multiple-choice type questions. Most teachers also implement knowledge assessment with various other measures such as experiment. drill, physical training test and report. Assessment of attitude is mostly implemented by teachers. They evaluate such factors as uniform, participation, attendance, absence, and lateness. Students' behavior and attitude during classes are also mostly reflected in assessment. 68.8% (thirty three) respondents answered that they evaluated students' attitude every class. Third. as for the awareness of performance assessment according to students' gender, both boys and girls are found to be well aware of the assessment. They showed positive responses toward the number of assessment, fairness and accuracy of self assessment and peer assessment; toward humanistic education and academic achievement which are results of performance assessment, boys showed positive responses whereas girls showed negative ones. Fourth, the comparison of awareness of performance assessment according to school type shows that respondents from all types of boys', girls' and co-ed high schools responded positively, and especially respondents from boys' high school answered more positively. As for the reflection of students' interest on the assessment, respondents from all types of boys', girls', and co-ed high schools responded negatively, and especially respondents from co-ed high schools answered more negatively. Respondents from all types of high school, especially those from girls' high schools answered positively to the question regarding standards, function of performance assessment, appropriateness of reflection rate and the number of assessment of students' knowledge and attitude. With regard to fairness of performance assessment and accuracy of self assessment and peer assessment, respondents from both boys' and girls' high schools answered positively, especially there were more positive answers from girls' high schools. Respondents from boys' and girls' high schools answered more negatively than those from co-ed high schools to the question regarding effectiveness of group assessment in performance assessment. To the question of contribution of performance assessment to humanistic education, respondents from co-ed high schools answered more negatively than those from boys' and girls' high schools. Respondents from boys' and girls' high schools showed positive responses on the contribution of performance assessment to academic achievement, whereas respondents from coeducational high schools showed negative responses. which is statistically significant(F=3.909, p= .021). However, aftermath verification showed that only respondents from boys' and coeducational high schools showed significant difference (p= .020).

잠수작업에서 발생한 상완골두의 이압성 골괴사 증례

김덕수,임현술 동국대학교 의학연구소 1999 東國醫學 Vol.6 No.-

국문초록 본 증례는 42세 남자로 18년간 잠수 작업에 종사하였으며, 1997년 10월부터 1998년 4월까지 포항 신항만 3부두 하부 지핑공사에 참여하던 중 좌측 견갑부에 간헐적 동통을 경험하였다. 좌측 견갑부의 외향과 외회선에서 약간의 운동 제한이 있었지만 다른 이학적 검사에서 특이 소견이 관찰되지 않았다. 일반 혈액 검사상 백혈구수, 혈색소 및 혈소판수는 정상 범위에 있었다. 백혈구의 백분율은 호산구만 약간 증가하여 6%의 범위에 있었다. 적혈구 침강속도는 정상 범위이었으며, 일반 소변 검사는 정상이었다. 류마토이드 인자, 매독반응 검사 및 B형 간염 항원 검사는 음성 반응을 나타냈다. 생화학 검사상 간기능 검사, 혈당, 콜레스테롤, 트리글리세라이드, 요소질소 및 크레아티닌은 정상 범위이었다. 단순 견갑부 방사선 소견은 좌측 상완골두 골단과 골간단에 경화성 골변화를 보였으며, 자기공명영상은 좌측 상완골두에 무혈성 괴사에 합당한 소견을 보였다. 본 증례는 장기간 잠수 작업을 수행하였고, 이압성 골괴사에서 잘 발생하는 상완골에 무혈성 괴사가 발생하였고, 다른 원인에 의한 무혈성 골괴사의 원인을 배제할 수 있었다. 그러므로 본 증례는 직업에 의한 이압성 골괴사라고 생각하여 문헌 고찰과 함께 보고하는 바이다. AbstractA case of dysbaric osteonecrosis suspected to be associated with occupation was found out from those who occupied in a harbor constructing company. The patient was a 42-year-old male. He worked as a diver in many companies for 18 years. On Dec 8, 1997, he complained a servere pain on his left shoulder. Physical examination showed a slight motion limitations on abduction and external rotation of the left shoulder. Laboratory examination showed a slight increase of eosinophil percent, but other findings were within normal limits. On radiographs, sclerotic bony changes on epiphysis and metaphysis in head of left humerus could be observed and he was diagnosed as avascular necrosis of the bone.

볼엔드밀 가공시 이송변화에 따른 가공형상 특성

왕덕현,김원일,이윤경,임채열,우정윤,박창수 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.2

Due to the development of the CNC machine tool and CAM software, sculptured surface machining can be broadly used in die and mold industries and ball end milling process is often used for the sculptured surface machining. It is found out how feedrate affects the precision of the machining and also tried to study the most suitable feedrate in specific cutting condition. Two eddy current sensors were used for measuring tool deflections of X, Y axis, dynamometer for cutting force and roundness tester for roundness. It was found that the tool deflection is getting better as tool path is going to farther from the center of convex surface. The reason is that the cutting force is increased as the tool approaches to the center. Examining the roundness, cutting force and tool deflection characteristics, it was found that the most suitable feedrate is 90mm/min in convex surface and 120mm/min in concave surface.

일개 자동차 부품공장 근로자에서 초음파로 측정한 수근관 형태와 수근관증후군 위험도

김덕수,정해관,임현술,권용욱,이종민,조대현,최대섭 大韓産業醫學會 2002 대한직업환경의학회지 Vol.14 No.3

목적 : 일개 사업장의 생산직 근로자를 대상으로 손목 계측치 및 초음파를 이용한 수근관 계측치의 상관성 분석을 통하여 수근관증후군 발생에 관여하는 개인의 감수성 및 위험요인을 파악하여 생산직 근로자들의 수근관증후군 예방에 활용하고자 본 연구를 수행하였다. 방법 : 경주시에 위치한 자동차 방음재를 생산하는 사업장에 생산직 근로자 남자 24명, 여자 11명 등 총 35명을 대상으로 2000녀 4월과 2000년 10월 반드시 각 설문조사, 이학적검사, 전기진단검사를 실시하였으며, 2000년 10월에는 초음파를 이용한 수근관계측도 실시하였다. 결과 : 수근관증후군의 신체계측 요인에 따른 분석에서는 수근관 전치/폭 비가 0.17 미만인 군에 비하여 0.17 이상인 군에서 통계적으로 유의하게 높았다(p<0.05). 총 수근관 면적(두께×폭)은 300 ㎟이상인 군에 비하여 300㎟ 미만인 군에서 통계적으로 유의하게 높았다(p<0.05). 성별을 통제변수로 처리한 신체 계측치간 상간 분석에서는 수근관폭은 전기진단 검사와 음의 상관성을 보였으며, 수근관 두께는 전기진단 검사와 양의 상관성을 보였다. 수근관 두께/폭 비는 전기진단 검사와 양이 상관성을 보였으며, 수근관비 전치/두께 비는 전기진단 검사 결과와 음의 상관성을 보였다. 하부 수근관 면적[폭×(두께-전치)]은 전기진단 검사와 양의 상관성을 보였으며, 상부 수근관 면적(폭×전치)은 전기진단 검사와 음의 상관성을 보였다. 또한 수근관 전치의 상대적 비가 클수록 수근관증후군의 회복이 유의하게 좋았다. 결론 : 수근관증후군은 수근관 폭이 좁을수록, 수근관 두께가 두꺼울수록, 수근관 전치가 작을수록 수근관증후군 위험도가 증가한다. 저자들은 초음파를 이용한 수근관 형태의 측정은 수근관증후군의 발생의 내적 요인에 대한 중요한 정보를 제공하면 수근관증후군 발생 및 회복의 개별적 위험요인을 예측하는데 중요한 근거를 제공하는 것으로 판단하였다. Objectives: This study was conducted to evaluate individual susceptibility to carpal tunnel syndrome (CTS) by ultrasonographic measurement of the carpal tunnel configuration in workers doing repetitive work. Methods: The study subjects consisted of 24 male and 11 female workers in a soundproof material manufacturing company in Gyeongju. We conducted a self-reported questionnaire survey, a physical examination and an electrodiagnostic study (EDS) in April 2000. After the examination, jobs were rearranged for workers with CTS. A follow up physical examination. EDS, and measurement of the carpal tunnel by ultrasonography was done six monsths later. Results: Of those studied. prevalence or CTS was 63.6/100 persons among women and 29.2/100 persons among men. Mean depth and width of wrist was shorter in those with CTS compareal to the controls (p<0.05). The risk of CTS was higher in workers whose carpal tunnel ratio (displacement/width) was 0.17 or higher (OR 7.13, 95% confidence interval 1.18-43.1), and in workers whose carpal tunnel area was less than 300 ㎟ (OR 8.00, 95% confidence interval 1.18-68.5). Carpal tunnel depth and depth/width ratio had a positive correlation with motor latency of the median nerve and median-ulnar sensory latency difference (p<0.05). whereas the carpal tunnel width. displacement/depth ratio, and area (width×displacement) had a negative correlation with median nerve latencies after adjusting for gender. Workers who showed an improvement in the clinical stage of CTS after job rearrangement had a significantly lower carpal tunnel displacement/width ratio and displacement/depth ratio. They also had smaller upper carpal tunnel area (width×displacement) and larger upper carpal tunner\l area [(depth-displacement)×width] than the controls (p<0.05). Conclusions:Ultrasonographic measurement of the carpal tunnel is a good predictor of susceptibility and prognosis of CTS in workers doing repetivive work.

우리나라 輸出 保險制度에 관한 一考察

金德洙,林龍澤 군산대학교 산업개발연구소 1986 産業開發硏究 Vol.5 No.-

분뇨 처리용 선박 저장탱크에서 발생한 황화수소로 인한 사고 증례

김덕수,임현술,김두희 동국대학교 의학연구소 2000 東國醫學 Vol.7 No.-

본 증례는 폐기물 저장탱크에 장기간 보관된 분뇨를 청소하던 4명의 선원이 급성 중독으로 2명은 사망하고 2명은 생존하였다. 다음날 실시한 작업환경 측정결과 황화수소 농도가 150 ppm 이상 측정되어 황화수소 중독에 의한 사고로 판명되었다. 사망자의 사망원인은 황화수소 중독으로 의식을 잃고 쓰러지면서 저장탱크에 고인 물속에 잠겨 기도 확보가 되지 않아 생긴 익사로 추정된다. 생존자는 100% 산소와 지지치료 만으로 회복되었다. Hydrogen sulfide (H2S), one of the most poisonous gases, is usually encountered in various occupations as a byproduct. Four crew were collapsed in a waste storage tank while they were cleaning it. Immediately they were rescued, but two crew died and two crew survived. Gas analysis in the waste storage tank showed high concentrations of hydrogen sulfide (above 150 ppm) after one day. The causes of death were asphyxiation because their face fell into mixed water with collapsed state, not due to H2S intoxication. The victims completely recovered with supportive care, including 100% normobaric oxygen.

개 원발성 면역매개성 혈소판 감소증 증례

유찬,임수정,이선희,박형진,김태신,송은식,김덕환,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1

A 13-year-old, castrated male, Maltese-dog was admitted to the Veterinary Medical Teaching Hospital of Chungnam National University with the history fo petechiae. On physical examination, she had petechiae and ecchymoses at her back, bilateral inguinal region, and inner part of ear pinna. CBC indicated neutrophilia and severe thrombocytopenia. A few platelets, no autoagglutination of RBC, and no spherocyte were observed. Coagulation profile demonstrated normal PT, and aPTT. No significant findings was not found on serum biochemical profile and electolytes test. FNA of a splenic mass which was found on the abdominal radiograph and sonograph demonstrated extramedullary hematopoiesis, Proteinuria was observed on urinarysis. Primary immune-mediated thrombocytopenia was diagnosed by ruling out of other underlying disease, severe thrombocytopenia, and response to immunosuppressive therapy. Prednisone and antibiotics were administered orally and parenterally, respectively. After altering prednisone to azathioprine, the number of platelets was recovered to normal range and petechiae and ecchymoses were improved.