산업단지 및 일반생활 지역의 공기 중 톨루엔에 대한 개인노출 및 생체시료의 상관성 분석

이병준(Byoungjun Lee),허 정(Jung Heo),정다영(Dayoung Jung),김순신(Sunshin Kim),류현수(Hyeon-Su Ryu),최민지(Min-Ji Choi),솨이지엔페이(Jian-Fei Shuai),임성국(Sung-Guk Im),양원호(Wonho Yang) 한국환경보건학회 2017 한국환경보건학회지 Vol.43 No.4

Objectives: The purpose of this study was to assess the correlation relationship between personal exposure and urinary hippuric acid in biological monitoring for airborne toluene in an industrial complex and in general environments. Methods: Personal exposure to toluene and its metabolite, hippuric acid, in urine were simultaneously measured in occupational environments area near an industrial complex and in general environments. The study subjects were divided into three types: 137 workers who use organic solvents in the workplace, 210 residents living near a dyeing industrial complex, and 379 residents living in general environments. The toluene exposures of workers and residents were measured by a passive sampler for four days. The urine of participants was sampled when the passive samplers of personal exposure were collected. Results: The toluene and hippuric acid concentrations of workers were the highest, followed by the concentrations of residents living near a dyeing industrial complex and residents living in general environments. The coefficient of correlation between the concentrations of toluene and hippuric acid among workers was 0.749 (p<0.01) in the workplace. On the contrary, correlations between the concentrations of toluene and hippuric acid among residents living near a dyeing industrial complex and residents living in general environments were all not significant. The relationship between the concentrations of hippuric acid and toluene in three types could be described by the exponential growth model. Conclusions: This study analyzed the relationships between toluene exposure and the concentrations of hippuric acid in urine in high, middle, and low exposure environments, and could be described by the exponential growth model.

PWM AC-DC 컨버터의 입력전류 직접추종제어

우정인,최선영,정영일,서정기,허태원 東亞大學校 大學院 1999 大學院論文集 Vol.24 No.-

본 논문에서는 PWM AC-DC 컨버터의 정상상태 제어오차를 제거하고, 과도 특성을 향상시키기 위한 새로운 전류제어계를 제안한다. 먼저, 일반적인 PWM 컨버터에 대한 상태공간 모델로 표현된 수학적 모델이 제시된다. 컨버터의 상태공간 모델은 제안하는 전류제어계를 포함한 PWM 컨버터의 시뮬레이션에 사용된다. 본문에서 제안하는 정현추종 제어계는 교류성분의 전류를 직접추정 제어 하기때문에 좌표변환 알고리즘을 필요로하지 않는다. 입력전류 제어계의 전달함수롤부터 정상상태 오차가 영이되는 것을 입증한다. 그리고, 시뮬레이션과 실험을 통하열 본 제어방식의 타당성을 입증하고자 한다.

공탄성시스템의 확률론적 제어에 대한 실험적 연구

김대중,박상태,정재욱,허훈,Kim, Dae-Jung,Park, Sang-Tae,Jeong, Jae-Uk,Heo, Hun 대한기계학회 1999 大韓機械學會論文集A Vol.23 No.11

A Newly proposed control methodology applied to the aeroelastic system experiencing flutter is investigated and its performance is verified experimentally. The flexible cantilever beam slicked with piezofilm sensor and piezoceramic actuator is modelled in physical domain. Dynamic moment equation for the system is derived via Ito's stochastic differential equation and F-P-K equation. Also system's characteristics in stochastic domain is analyzed simultaneously. LQG controller is designed and used in physical and stochastic domain. It is shown experimentally that the vibration of beam is controlled effectively by designed LQG controller in physical domain. By comparing the result with that of LQG controller designed in stochastic domain, it is shown that the new control method, called Heo-stochastic control technique, has better performance as a controller.

2007 학생생활연구소 내방 학생 특성에 대한 연구 : MBTI와 MMPI를 중심으로

허정은,한영옥 서울여자대학교 학생생활연구소 2007 학생생활연구 Vol.20 No.-

본 연구는 서울여대 학생생활연구소에서 심리검사를 실시한 133명을 대상으로 MBTI에 의한 성격유형과 MMPI에 나타난 심리특성과의 관계에 대한 연구를 통해 추후 상담에 활용할 수 있는 정보를 제공하고자 한다. 이 목적을 위해 먼저 관련된 선행연구들을 개관하였으며, 사용된 자료분석방법은 MBTI 연속 점수와 MMPI 임상척도들간의 상관관계분석, 다중회귀분석, 분산분석 들이었다. 내향적일 수록 MMPI Ma가 낮은 것으로 나타났고 감정형일수록 MMPI Hs가 상승하고 사고형일수록 Mf척도가 상승하는 것으로 나타났다. 직관형은 Pd, Sc, Ma 등이 상승하고 인식형은 L. K척도가 상승하는 것으로 나타났다. 분산분석 결과 내향적인 집단은 MMPI 척도 높은 D와 Si, Pt가 통계적으로 유의미하게 나타났고, 외향적인 집단은 낮은 D와 Si가 통계적으로 유의하게 나타났다. 연구결과 Jung의 성격유형과 MMPI에서 나타나는 정신 병리와의 관계가 상당히 지지되었다. MBTI와 MMPI의 자료를 종합적으로 활용하는 것이 내담자에 대한 폭넓은 이해를 증진시킬 수 있을 것으로 보여 진다. The purpose of this study is to help the better counselling for the students examining the characteristic features of the accumulated data of client that had been used tests including MBTI, MMPI in 133 university student. Above all, it examined the former articles on the related subjects, and the used statistical methods were simple correlation, multiple regression analysis, Anova. The score of I preference of MBTI were significantly positively related to Ma scale of MMPI. The score of F preference of MBTI were significantly positively related to Hs scale of MMPI. The score of T preference of MBTI were significantly positively related to Mf scale of MMPI. The score of P preference of MBTI were significantly positively related to Pd, Sc, Ma scales of MMPI. The score of J preference of MBTI were significantly positively related to L, K scales of MMPI. The result of One way Anova were follows. The score of Introversion type were significantly more high in D, Si, Pt scales of MMPI than other group. The score of Extroversion type were significantly more low in D, Si, Pt scales of MMPI than other group. Jung's theories of psychological types and the pathology were somewhat supported by the results of this study.

골프장 경기보조원의 근골격계 자각증상과 관련 요인

허경화,한영선,정혜선,구정완 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1

목적: 직업관련성 근골격계질환과 관련된 여러 가지 위험요인에 노출되어 있는 경기보조원의 작업내용과 관련하여 근골격계 증상 유발 양상을 파악하고, 근골격계 증상 관련 요인을 파악하고자 하였다. 방법: 경기도 지역에 있는 6개 정규 골프장을 대상으로 경기보조원 316명에 대하여 2003년 4월 9일부터 4월 30일까지 3주간 설문지를 배부한 후 자기 기입 식으로 작성하게 하여 수거함으로써 자각증상 조사를 실시하였으며, 설문지는 미국 산업안전보건연구원이 사용하는 표준화된 설문지(NIOSH, 1993)의 국내 번역판(노상철 등, 1997)을 이용하였다. 결과: 조사대상 경기보조원의 신체 부위별 근골격계 자각증상 호소율은 다리/무릎/발목/발이 41.8%로 가장 높은 증상 호소율을 보였으며 어깨 35.8%, 등/허리 35.8%, 목 28.8%, 팔/손목/손가락 28.5% 순 이었다. 성수기의 1일 근무시간이 팔/손목/손가락 부위를 제외한 나머지 부위에 영향을 주는 것으로 나타났다. 경기보조원의 업무특성과 관련하여 골프장의 경사와 굴곡의 정도, 내장객의 폭언 및 폭행, 업무의 속도를 조절할 수 없음, 일의 육체적 부담의 강도, 고용의 불안정성, 직장을 잃을 가능성 등이 근골격계 자각증상과 유의한 연관성을 보였다. 직무스트레스 특성에서는 정신적 직무요구도가 높은 반면, 낮은 직무 재량도를 보여 근무긴장도가 높은 것으로 조사되었다. 다변량 로지스틱 회귀분석을 실시한 결과 목 부위, 어깨 부위, 등/허리 부위 및 다리/무릎/발목/발 부위의 근골결계 증상에는 성수기 12시간 이상의 근무시간이, 팔/손목/손가락 부위의 증상에는 낮은 직무 재량도에서 유의한 영향을 미치는 요인으로 관찰되었다(P<0.05). 결론: 경기보조원의 근골격계 증상은 과중한 업무시간과 높은 직무요구도에 비해 낮은 직무재량도를 보이는 고긴장 직무 등에 의해 호소율이 높게 나타남을 알 수 있다. 근골격계 질환의 호소 요인에 대한 구체적인 대안의 마련과 더불어 정부기관에서 주도적으로 검토하여 경기보조원들이 속해있는 골프장 운영업체가 근골격계질환의 예방을 위한 조치와 경기보조원의 건강과 관련한 안전보건교육 등을 시행할 수 있도록 하는 방안이 마련되어야 할 것으로 본다. Objectives: This study evaluated the complaint rates of musculoskeletal symptoms and investigated the related factors of musculoskeletal symptoms in the caddies. Methods: For 316 caddies working at 6 regular golf courses, we used the self-recording questionnaires to examine general characteristics, job stress factors, subjective musculoskeletal symptoms designed by NIOSH, working environments, and working contents. Results: The complaint rates of musculoskeletal symptoms according to the musculoskeletal criteria of NIOSH were 41.8% in leg/knee/ankle/foot, 35/8% in the upper back/lower back, 28.8% in the neck, and 28.5% in the arm/wrist/fingers. Important factors affecting musculoskeletal symptoms were daily working hours during the high-demand seasons in all anatomical sites except the arm/wrist/fingers. Other related factors were degrees of winding and inclined in the golf courses, violent language and violence of customers, inability to regulate the velocity and work load control, heavy physical burden, instability of employment, and possibility of unemployment according to the specialty of caddies. As a results of multivariate logistic regression analysis, musculoskeletal symptoms of the neck, shoulders, back/lower back and leg/knee/ankle/foot were significantly influenced by working time over 12 hours in the high-demand season, and symptoms of the arm/wrist/fingers by low decision latitude (P<0.05). Conclusions: The complaint rates of musculoskeletal symptoms in the caddies were affected by working time over 12 hours and low decision latitude against excessively high psychological job demand.

학교생활 부적응 요인이 학교사회사업 서비스 욕구에 미치는 영향에 관한 연구 : 고등학생을 중심으로

허정철,김원옥 朝鮮大學校 社會科學硏究所 2007 社會科學硏究 Vol.28 No.1

어머니의 양육태도가 청소년의 자아존중감, 성취동기, 사회성에 미치는 영향에 관한 연구

허정철,김원옥 朝鮮大學校 社會科學硏究所 2005 社會科學硏究 Vol.26 No.2

전반사형 외인성 페브리 페롯 광섬유 압력센서의 설계

허진석,이정주 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

스포츠 자기관리 전략 : 이론적 고찰

허정훈 중앙대학교 스포츠과학연구소 2001 體育硏究 Vol.- No.14

This study was an attempt to theoretical approach for the 'self-management'. At first, the theory and definition looked over. Second, the variety of the views and model of it were showed. Moreover, the researches that closely related to 'self-management' were reviewed. Specifically the content of 'self-management' in the sports psychological skill and self-control strategies was explored, and the strategy of it in the real situation was discussed. This study was emphasized the athletes' performance improving and quality of their life. And it will be used for the basic source in the researching of 'self-management'.

지역사회 구강진료기관 치위생사 집단의 직무만족에 관한 조사

허희영,오정숙,성진효,김동기 조선대학교 구강생물학연구소 2002 Oral Biology Research (Oral Biol Res) Vol.26 No.2

This study is intended for suggesting some methods or measures to improve the working environment and dental service consequently by finding out general characteristics and various factors that affects the job satisfaction in the organization according to dental hygienists' job peculiarities and supplying dental hygienists' improvement in quality and good dental treatment with dental hygienists who work in the dental clinics in the community as study objects. In this study, to research and analyze dental hygienists' job satisfaction to improve dental hygienists' job satisfaction and promote efficiency in personnel management, 50 dental clinics where there were more than 5 dental hygienists were chosen at random and 250 dental hygienists who work there were given questionnaires and the questionnaires were analyzed and finally the result was as follows. Firstly, there are some general characteristics. The ages of 2.0~2.5 cover 68% of the dental hygienists. The unmarried occupied 81.2%. The size of the working place is the dental clinic(joint opening of a dental clinic), which occupied 54.2%. Secondly, there is a meaningful difference working ability, a sense of belonging and job stability or potentiality in case of job characteristics according to the marriage or singleness, and the married questionees are higher than the unmarried ones in the average value in all question sections. Thirdly, in case of the working Place that affects dental hygienists' job satisfaction there is a difference in the working region and no difference in the working place. Fourthly, it was found out that the difference between variables according to the region is meaningful. In working ability and job stability or potentiality, there is a meaningful difference according to the region. Lastly, the things that should be improved in the dental clinics are guarantee of job stability or potentiality, harmony in the group, publicity work, geographical conditions, improvement in dental treatment level, degree of reliability and kindness for patients , equipment. and finally hygiene.