100m 달리기시 최고 속도 구간과 감속 구간의 동작 비교 연구

은선덕,정철수,배성제 한국운동역학회 1996 한국운동역학회지 Vol.6 No.1

본 연구의 목적은 100m 달리기에서 최고 속도 구간과 감속 구간에서의 동작을 비교하여 감속의 원인을 규명하는 데 있다. 두 구간에 대한 주요 운동학적 변인인 신체 중심의 속도와 변위, 보속과 보폭, 상체의 전경각, 관절각, 각속도를 분석하여 다음과 같은 결론은 얻었다. 감속 구간에서의 지면 접촉 기간 동안과 체공 기간 동안의 신체 중심의 수평 속도는 최고 속도 구간에 비해 느린 것으로 나타났다. 보속은 최고 속도 구간에 비해 느린 것으로 나타났고, 지지 시간은 긴 것으로 나타났으며, 체공 시간은 차이가 나타나지 않았다. 보폭은 최고 속도 구간에 비해 짧은 것으로 나타났고, 착지시 신체 중심과 발끝의 수평 거리는 최고 속도 구간에 비해 긴 것으로 나타났다. 또한 상체의 전경각은 착지시에만 차이가 있었으며 최고 속도 구간에 비해 작고, 무릎 관절각은 착지시와 이지시에 있어서 최고 속도 구간에 비해 작았다. 그리고 고관절각은 반대발의 이지시와 착지시, 그리고 최소값에 있어서 최고 속도 구간에 비해 크고, 운동 범위에 있어서는 작은 것으로 나타났다. 또한 무릎 관절 각속도는 최고 속도 구간과의 비교에서 차이가 나타나지 않았다. The study was conducted to make a comparative analysis of running motion and to examine the difference in the deceleration phase(80∼90m) and the Max-speed phase(30∼40m) during the 100-meter Sprint. In this study, data was analyzed with variables including velocity and displacement of center of gravity, stride frequency, stride length, foward angle of upper body, joint angle, angular velocity in the deceleration phase and the max-speed phase. The conclusions of the study were as follows ; 1. Horizontal velocity of the center of gravity in the deceleration phase was found to be slower than that in the max-speed phase in the supporting period and non-supporting period. 2. Stride frequency in the deceleration phase was found to be slower than that in the max-speed phase, and supporting time n the deceleration phase was longer than that in the max-speed phase, also there was no difference between each phase in nonsupporting time. 3. Stride length in the deceleration phase was to be found shorter than that in the max-speed phase. 4. Horizontal distance between the center of gravity and toe in the deceleration phase was to be found longer than that in the max-speed phase. 5. Forward angle of upper body at the moment of touch down in the deceleration phase was found to be smaller than that in the max-speed phase. 6. Knee angle at the moment of touch down and take off in the deceleration phase were found to be smaller than in the max-speed phase. 7. Hip angle at the moment of touch down and take off of the other foot, and minimum hip angle in the deceleration phase were found to be larger than that in the max-speed phase, and range of, motion in the deceleration phase was smaller than that in the max-speed phase. 8. Knee angular velocity at the moment of touch down of the other foot toward flection in the deceleration phase was found to be larger than that in the max-speed phase.

내독소로 유발된 삼추성 중이염에서 TNF-α Inhibitor의 효과

전은주,박용수,최영철,이정학 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.10

소아 만성 부비동염의 원인균 분석

최영철,김태철,전은주,박용수 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.4

일부 소규모 시계조립 사업장의 상지 누적외상성장애의 유병률

장은철,김현주,권영준,박시복,이수진,송재철 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.4

목적 : 단순 반복작업을 하는 시계조립 사업장 근로자를 대상으로 상지 누적외상성장애의 자각증상 유병률과 상지 누적외상성장애 유병률을 파악하고자 하였다. 방 법 : 인구학적 특성, 상지의 자각증상, 사회심리적 요인은 자가 설문지법으로, 인간공학적 특성은 점검표를 이용한 면담법으로 조사하였다. 상지의 자각증상 조사와 사회심리적 요인은 각각, N10SH (1993) 설문지와 Karasek(1979)의 Job strain model을 번역하여 조사하였다. 상지 누적외상성장애 판정은 의사가 작업 현장에서 직접 환자 면담과 이학적 검사를 수행한 후, 연구에서 규정한 증례정의에 의해 수행하였다. 수집된 자료는 x2 teat와 exact test로 단별량 분석을 하였고, 이중 의미있는 변수와 위험 인자로 알려진 변수들로 다중 로지스틱 회귀분석을 시행하였다. 결 과 : 대상자들의 자각증상 유병률은 54.2 %였고, 부위별로는 목 34.9 %, 손/손목 31.3 %, 어깨 30.1 %, 팔/팔꿈치 18.0 %순이었다. 상지 누적외상성장애의 유병률은 45.8 %였고, 근막동통증후군이 26명으로 가장 많았고, De Quervain씨 병 8명, 수부/전완부의 건염 및 건활막영 8명, 수근관 증후군 5명, 이두건염 5명, 척골 신경병증 5명, 내상과 염 4명, 외상과염 2명, 경추 디스크 질환 2명, 흥곽 출구 증후군 1명순으로 나타났다. 단변량 분석시 자각증상 유병률은 작업부서 중 완성 부에서, 상지 누적외상성장애 유병률은 여자와 완성 부에서 통계학적으로 유의하게 높았다. 다중 로지스틱 회귀분석 결과 완성부와 근무긴장도가 높은 군이 상지 누적외상 성장애와 통계학적으로 유의한 결과를 보였다. 결 론 : 이 연구에서 상지 누적외상성장애 유병률은 45.8 %으로서 저강도의 단순 반복작업을 하는 시계조립 사업장 근로자에서도 누적외상성장애의 위험이 있는 것으로 생각된다. 또한, 사회심리적 요인과 작업 부서별 공정 및 환경이 유병률에 영향을 미치는 주요 요인으로 생각되며, 향후 이들에 관한 다양한 연구가 진행되어야 할 것이다. 산업보건 현장에서는 시계조립 사업장과 같이 저 강도의 단순 반복작업을 위주로 하는 사업장에 대한 지속적인 관심과 각 사업장별 위험요인을 파악하여 적절한 예방 및 관리 대책을 세워야 할 것이다. Objectives : The prevalence of cumulative trauma disorders of upper extremities mons watch assembly workers in small-scaled industry was studied. Methods. In 83 workers at five watch assembly factories, symptoms and psychosocial questionnaire, ergonomic Interview, physical examination were conducted. Results : Prevalence of self-reported symptoms was 54.2% and neck 34.9%, wrist/hand 31.3%, shoulder 30.1%, elbow/arm 18.0% by anatomical site. Prevalence of cumulative trauma disorders was 45.8%. Most common disease was myofascial pain syndrome (31.3%). The other diseases were De Quervain disease (9.6%), tenosynovitis/tendinitis at wrist/hand (9.6%), bicipital tendinitis(6.0%), fat. epicondylitis(4.8%), meIn. epicondylitis(2.4%), and cervical disc disease(2.4%). As result of ergonomic interview, repetitiveness was 79(98.8%). There were no differences in the prevalence of self-reported symptoms and cumulative trauma disorders for age, sex, marital status, duration of work In the study, The significant factors of cumulative trauma disorders were occupational task and psychosocial stress in the study. The prevalence of cumulative trauma disorders in high strain group was hlgher (68.4%) than other three groups. The prevalence of self-reported symptoms and cumulative trauma disorders in assembly task was higher (70.0%, 64.0%) than other two tasks. Conclusions : Prevalence of self-reported symptoms was 54.2%, prevalence of cumulative trauma disorders was 45.8% in watch assembly workers. In this study, factor related to self-reported symptoms was occupational task and factors relaxed to cumulative trauma disorders were occupational task and psychosocial stress. This results suggest that differences of ergonomics and environment in occupational task cause differences of prevalence of self-reported symptoms and cumulatlve trauma disorders.

한국인의 구강위생용품 사용실태에 관한 조사연구

서은주,신승철,서현석,김은주,장연수 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.2

The purpose of this study was to evaluate the actual state of Koreans' behavior about the use of oral hygiene devices and to collect the baseline data for developing appropriate educational objectives to improve dental health. Questionnaires were used to personally interview 1,685 residents in Korea. The obtained results were as fallows; 1. Average head size of toothbrushes was 23.2㎜ in children, 28.2㎜ im adults. 2. The averagep percent of using dentifrice containing fluoride at home was 66.7% in children, 71.4% in adults. 3. The average percent of using orthodontic toothbrushes was 50.5% in orthodontic patients, and the average percent of using interdental burshes was only 16.9% in orthodontic patients. 4. The average percent of using dental floss was 22.3% in periodontic patients, and the average percent of using interdental brushes was 16.5% in periodonitc patients. 5. The patients usually use oral hygiene devices by means of dentals' suggestions and commercial advertisement. 6. Generally few people use auxiliary oral hygiene devices. To improve the oral health starus effectively, more improved and correct informations and materials should be provide to dentists, dental hygienists and patients.

각주 콘크리트 공시체의 크기 효과에 관한 연구

강수철,은희창 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1

The strength of concrete for design or core concrete for destructive test depends on several parameters including the size and type of specimen. The Korean and European Standard take 415x30 cylindrical and 15 an cubic specimens for measuring the concrete strength, respectively. There have been rare attempts to decide the relationships according to the shape and size of squared specimens. Especially. it is incorrect to use the existing data due to the different material properties in Cheju from the others. Therefore. in this experimental study, we investigate the relationships and compare with the existing results. The experimental results will be utilized to grasp the material and mechanical characteristics of concrete in Cheju.

산업재해 환자의 삶의 질, 자살사고 및 우울증상

김수인,연규월,하은희,우행원,김영철 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.3

연구목적 : 최근 산업재해(이하 산재) 및 교통사고 발생이 증가하면서 사고 후유증으로 치료받는 환자들이 늘어나고 있다. 산재를 포함한 각종 사고들은 환자의 신체적 상태를 변화시킬 뿐 아니라 이로 인한 사회적, 직업적, 경제적 문제들을 초래하게 되고 환자의 삶 전체를 변화시킬수 있다. 본 연구에서는 산재가 환자들에게 미치는 정신적 영향을 알아보기 위해 산재 환자들과 대조군에서 삶의 질, 자살사고 및 우울증상을 비교하였다. 방 법 : 연구대상은 1999년 12월 21일부터 12월 30일 사이에 경상남도 울산 마산·창원지역의 입원한 산재환자 169명이었고 정상 대조군은 울산의 공업단지 내 일반근로자 166명이었다. 평가군과 대조군 모두 남성이었고, 19세에서 60세였다. 모든 대상에서 일반 인구학적 특성, 삶의 질, 자살사고, 우울 증상을 평가하였고, 산재 환자군의 경우 사고일시, 사고원인, 치료기간, 손상부위를 추가로 조사하였다. 주관적 삶의 질은 한국판 스미스클라인 비챰 삶의 질척도로 평가하였고, 자살사고는 Beck의 자살사고(思考)척도로 평가하였으며, 우울증상은 PRIME-MD를 개선한 Patient Problem Questionaire의 우울증 척도로 평가하였다. 결 과 : 산재환자군과 대조군간 일반 인구학적 요인에서 통계적으로 유의한 차이 없었다. 산재환자군이 대조군에 비해 유의하게 낮은 삶의 질 척도 점수를 나타냈고, 유의하게 높은 자살사고와 우울증상을 나타냈다(p<.05). 산재환자군에서 연령, 결혼상태, 치료기간과 삶의 질 점수는 관련이 있었다. 30대 이상의 연령에서 유의하게 낮았고 10∼20대 연령에서 유의하게 높았으며, 미혼이거나 이혼, 별거중인 경우 유의하게 삶의 질 점수가 낮았고, 치료기간이 길수록 낮았다. 치료기간과 자살사고가 관련있었으며, 치료기간이 길수록 자살사고가 많았다. 산재환자군에서 손상부위에 따라 삶의 질 점수, 자살사고 점수와 우울증상이 유의한 관련이 있었다. 삶의 질 점수는 요추부 손상군에서 높았고, 경추부 손상군과 다발성 좌상환자군에서 낮았다(p<0.01). 자살사고 점수는 경추부손상군과 다발성 좌상 환자군에서 높았고, 요추부 손상군에서 낮았다(p<0.01). 연구 대상군에서 삶의 질 점수, 자살사고 점수, 우울증상간 유의한 상관관계가 있었다. 결 론 : 본 연구 결과 산재환자들은 일반 근로자들과 비교하였을 때 삶의 질이 낮다고 느끼고 있었으며, 주관적으로 우울감과 자살사고를 많이 나타냈다. 따라서 산재로 인한 우울 및 자살등의 증상을 예방하기 위해서는 조기 정신과적 치료 중재가 반드시 필요하다고 생각된다. Objective : As the occupational and traffic accidents are increased, patients who are treated for complications of accidents have been increased in recent years. Accidents including industrial injury affect the physical state of the patients and make social, vocational, and economic problems, so that they can affect the whole life of the patients. We performed this study to compare subjective evaluation of quality of life, depressive symptoms, and suicide ideation in both industrial injury patients and control subjects in order to know how industrial injury affect patients in psychiatric aspect. Method : The subjects were 169 inpatients who met the inclusion criteria of industrial injury patients and 166 healthy control subjects. All subjects were male and their age is from 19 to 60 years old. Demographic variables, quality of life, depressive symptom, suicide ideation were assessed in subjects. The types of injury and duration of treatment were assessed in patients. The quality of life was measured using the Korean version of SmithKline Beecham 'Quality of Life' Scale(KvSBQOL), and the suicide ideation was measured using the Scale for Suicide Ideation(SSI), and the depressive symptom was measured using the Dpression scale of Patient Problem Questionaire(PPQ) which were devised from Primary Care Evaluation of Mental Disorder(PRIME-MD). Results : 1) There were no significant differences in the general demographic variables between industrial injury patients and control subjects. 2)Scores of KvSBQOL were significantly lower, and SSI and Depression scale of PPQ were significantly higher in the industrial injury patients than control subjects(p<0.05). 3) In industrial injury patients, there was a correlation between the age and the scores of KvSBQOL(p<0.01). The scores of KvSQOL were lowest in older than 30's, highest in 10's-20's. No significant correlation was recognized between the age and the suicide ideation, the depressive symptoms. Threre was a correlation between the marital status and the scores of KvSBQOL(p<0.01). In unmarried, divorced or separated state, the scores of KvSBQOL were significantly lower than married state. There was a correlation between the the duration of treatment and the scores of KvSBQOL, the suicide ideation. As the duration of treatment was longer, the scores of KvSBQOL were significantly lower(p<0.01), and the scores of SSI were significantly higher(p<0.01). 4) In industrial injury patients, there was a significant correlation between the type of injury nd the scores of KvSBQOL, the suicide ideation, and the depressive symptoms. The scores of KvSBQOL were highest in the L-spine injury patients, lowest in the C-spine injury and multiple contusion patients(p<0.01). The scores of SSI were higher in the C-spine injury and multiple contusion patients, lowest in the L-spine injury patients(p<0.01). 5) In subjects, there was significant correlation between the scores of KvSBQOL, the scores of SSI, and the Depression scale of PPQ. Conclusion : Industrial injury patients feel bad about the quality of life and have more depression and suicide ideation. As a results, psychiatric intervention is needed for prevention of depression and suicide due to industrial injury.

우리 나라 보건관리대행서비스 평가 연구

하은희,조수헌,김선민,주영수,한상환,하미나,권호장,홍윤철,김창엽 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.1

Group occupational health service programme started in 1990 is one of the measures to cope with limited human and financial resources in occupational health. The programme has expanded rapidly to include 52 institutions, private as well as public, all over the country. In spite of its potential impact on health of employees and practice of occupational health in small and medium sized industries, comprehensive evaluation in terms of quality has not been tried. This study has aims to develop the criteria to assess the quality of newly developed group occupational health service programme, and to investigate the quality of institutions, and finally to develop policies for the quality improvement. 1) Criteria development : By defining occupational health services, in particular for small and medium sized industries, as one of the primary health care, followings are included as core elements of qualitative occupational health programme; accessibility, continuity, comprehensiveness, technical quality, intersectoral collaboration, emphasis on preventive services, community participation, and adequacy. Again each element is divided into five major components of national health system infrastructure developed by the World Health Organization; development of health resources, organized arrangement of resources, delivery of health care, economic support, and management. In turn, each component is categorized into three aspects of quality assessment, structure, process and outcome. Expert panel selected several criteria for each category to evaluate the programme. Criteria were modified according to each group of interviewees, to produce two sets of questionnaire, one for chief operating officer and another for nurses in the institutions, and the chief operating officer and workers in the workplace. 2) Subject : Of all 52 institutions, 25 voluntarily participated in the survey. At individual institution, chief operating officer and practicing nurses were interviewed in depth. After intensive education for interviewees, every interviewees, every interview was performed with standardized guideline and questionnaire. The quality of the 'Group occupational health service programme' was found to be lower than expected. Especially in continuity, comprehensiveness, technical quality, community participation and adequacy, lower quality in structural aspect was commonly identified throughout all the institutions,. Quality in terms of accessibility and continuity highly varied among institutions., To improve quality of the programme, more comprehensive and systematic programme such as accreditation has to be introduced. In addition, human resources, governmental fund and information systems for individual workers are to be developed. As a long range plan, integration of occupational health services into the national health systems and pooling of financial resources and planned allocation should be considered.

FET형 CO₂센서의 제조 및 감응특성

이은숙,이영철,정지영,윤종훈,김창수,손병기,이흥락 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

A FET type micro CO_(2) sensor based on a Severinghaus type arrangement has been prepared and its response characteristics were examined. The sensor was fabricated by formation of hydrogel layer containing bicarbonate/chloride ions on the PH-ISFET and the Ag/AgCl reference electrode prepared by the thermal evaporation and chemical chloridation methods. And then gas-permeable membrane was dip-coated on the hydrogel layer of the sensor. Gas-permeable membranes were fabricated with silicon rubber and polyurethane dissolved in toluene and THF, respectively. The CO_(2) sensor with the silicon rubber membrane showed better sensitivity and lower detection limit than the CO_(2) sensor with the polyurethane membrane for dissolved CO_(2). The sensor with silicon rubber membrane at optimal conditions showed a good response: linear range of 1.60X10^(-4) ~ 4.40X10^(-2) M CO_(2), sensitivity of 57.30 mV/decade, and detection limit of 7.50x10^(-4) M.

측두하악관절내장증에서 하악과두운동과 측두하악관절조영상의 상호관계

최순철,박태원,유동수,이은숙 大韓口腔顎顔面 放射線學會 1994 Imaging Science in Dentistry Vol.24 No.2

Arthrography of the temporomandibular joint is a useful method of demonstrating the soft tissue abnormalities related to disc dysfunction. In this study, 19 asymptomatic joints, 31 joints with anterior disc displacement with reduction, 31 joints with anterior disc displacement without reduction which were classified by arthrotomography under fluoroscopy were evaluated to determine the linear measurement of anterior recess of inferior joint space and the relationship between the condylar anterior translation and the severity of the internal derangements. Their fluoroscopic images were also evaluated to describe the characteristics of condylar paths in internal derangements of the temporomandibular joints. The results were as follows; 1. The mean lengths of the anterior recess in asymptomain group, reduction group, and non-reduction group were 8.7±1.6㎜, 11.2±1.7㎜, 12.8±1.7㎜ respectively. The length of the anterior recess was increased according to the severity of the internal derangements(p<0.05). 2. Linear measurements of anterior movement of condyle on maximum mouth opening were 13.1±4.2㎜, 15.9±4.1㎜, 5.0±3.7㎜ in asymptomatic group, reduction group, and non-reduction group respectively. Compared with aymptomatic group, reduction group showed hypermobolity of the condyle and non-reduction group showed hypomobility. 3. Condyles moved beyond the crest of articular eminence in 80% of reduction group and did not reach it in 70% of non-reduction group. 4. The condyle moved mainly superiorly in reduction group(66%) and horizontally in asymptomatic group(47%). There were no cases to move superiorly in non-reduction group.