한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

내측회장동맥에 의해 형성된 척수경막동정맥루로 인한 척수병증 1예

이일형,배재천,이상무,김진혁,권기한,이병철 대한신경과학회 1999 대한신경과학회지 Vol.17 No.3

여자체조선수의 등속성 근력에 관한 연구

김진수,김태형 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-

The purpose of this study is to compare the specific character of health and isokinetic strength in elite and non-elite female gymnasts. Flexion of wrist joint, should or joint and hip joint, peak torque of extension, average power and so on are measured using Cybex 770 dynamometer. The results of two groups are compared. The results are as follow . 1.Back strength is higher significant(p〈.001) comparing with control. 2.Flexion at Peak torque of shoulder at 60deg/sec in female gymnast is highly significant(p〈.05) comparing with control. Extension at perk torque of shoulder at 60deg/sec, 180deg/sec in female gymnast is highly significant(p〈.05) comparing with control. 3.Flexion at peak torque % body weight of shoulder ratio at 60deg/sec, 180deg/sec is highly significant(p〈.01, p〈.05) comparing with control enter Flexion at peak torque % body weight of hip ratio at 60deg/sec, 180deg/sec, 240deg/sec in female gymnasts is highly significant(p〈.01, p〈.05) comparing with control. Extension at ratio of shoulder, hip and wrist at 60deg/sec, 180deg/sec in female gymnasts is highly significant(p〈.05) comparing with control. 4.Flexion of average power at 60deg/sec, 180deg/sec, 240deg/sec in shoulder is highly significant (p〈.01, p〈.05) comparing with control. Flexion of average power at 240deg/sec in hip is highly significant(p〈.01, p〈.05) comparing with control. Flexion of average power at 60deg/sec, 180deg/sec in extension is highly significant(p〈.01, p〈.05) comparing with control. 5.Shoulder flexion of average power % body weight at 60deg/sec in female gymnast is highly significant(p〈.05) comparing with control. Hip extension of average power % body weight at 187deg/sec, 240deg/sec in female gymnast is highly significant(p〈.75) comparing with control. Wrist of average power % body weight at 90deg/sec, 180deg/sec in female gymnasts is highly significant(p〈.05) comparing with control.

진동대 실험결과를 이용한 비선형 구조규명법

이형진 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-

This paper deals with the identification of the parameters of a smoothed hysteretic model (Bouc-Wen model) as well as the estimation of hysteretic histories of structural members, related to experimental seismic damage prediction of existing large structures, using the results of shaking table test. A method is proposed to estimate hysteretic histories of each structural members from measured response histories of the structure. These histories can be used to evaluate various kinds of damage indices. Secondly, the parameter estimation method is applied to construct the nonlinear mathematical model of these hysteresis. To demonstrate the proposed techniques, several numerical and experimental example analyses are carried out. The results indicate that the proposed method can be very useful to assess local seismic damages of structures.

폐굴껍질을 산성토양 적용시 토양의 화학적 특성변화에 관한 기초 연구

임진희,문종익,김성우,성낙창,이영형,윤태경 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2

Oyster shell has caused environmental problems in the coast. But it is possible to be used as an acidic soil amendment because it is the alkalic material of pH 9.0. In order to evaluate the utility of the crushed oyster shell as a soil amendment, acidic sandy loam soil was amended with it and then Chinese cabbages were cultivated in pots. The amount of the oyster shell was ⅰ)none, ⅱ)0.5kg/㎥, ⅲ)1.0kg/㎥, ⅳ)1.5kg/㎥, ⅴ)2.0kg/㎥ and ⅵ)2.3kg/㎥. The particle size of oyster shell consists of 34.88% of 40∼100mesh and 14.98% of larger than 100 mesh. It increased pH and the contents of available P₂O_(5) and SiO₂ and exchangeable Ca in used soil The application of oyster shell also increased the height and diameter of Chinese cabbages.

고등학교 프랑스어 시제 교수/학습 방법 : 복합과거와 반과거를 중심으로

박진형 한국 프랑스어문교육학회 2000 프랑스어문교육 Vol.9 No.-

웨이블릿 변환을 이용한 가속도 기록의 이중 적분법

이형진,어석홍,박정식 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-

It is well known that double integration of measured acceleration records is one of the most difficult signal processing, particularly in the case of measurements on civil engineering structures. The measured accelerations on civil structures usually contain non-gaussian and low-frequency noises as well as acceleration records are non-stationary. For this type of signals, wavelet transform can be useful because of its inherent processing abilities for non-stationary signals. In this paper, the de-noising algorithm using the wavelet transform are slightly extended to process non-gaussian and low frequency noises, using median filter concepts. The example studies show that the intergration can be improved using proposed method.

부분 계측결과에 의한 시간영역 구조안전도 모니터링

이형진,고광일 여수대학교 1999 論文集 Vol.14 No.2

In general, the structural responses of civil engineering structures such as bridges, power plants and large facility structures can not be completely measured at all D.O.F.'s. This incomplete measurement problem is one of the major reasons about the difficulty of the inverse problem such as system identification for the safety assessment, particularly in time domain. In this paper, two methods are presented to assess the changes of structural system using the incomplete measurements data in time domain. One of them is model parameter estimation technique to evaluate the model parameter changes in time domain. The other is a substructural identification method for the local damage assessment in interest. Using the subtructural methods, the number of unknown parameters for each identification can be significantly reduced, hence the convergence and accuracy of estimation can be improved. For the local damage assessment, the indirect estimation procedure was also applied to evaluate the damage index. To demonstrate the model parameters estimation technique in time domain, experimental results of 2-bay 3-store frame structure were used. For the verification of substructural identification method and the indirect local damage estimation procedures, several simulation and experimental example analyses were carried out for structural models of a 2-span truss structure and 3-story building model. The results indicate that the present modal parameter estimation technique and substructural identification method including damage estimation methods are effective and efficient for the detection of the modal parameter changes and local damage estimation of complex structures in time domain.

이동하중시험 결과를 이용한 교량상부구조의 손상도 추정

이형진,강태원 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

In this study, a measurement technique was studied to overcome the limited number of measurements using moving load tests and reciprocal theorem. Loading and measurement location can be easily switched in moving load test using the reciprocal theorem. So, the number of measurements can be drastically extend even in the limited number of actual measurements. This kind of property makes identification process more accurate and many simplified identification algorithms useful. Another advantage of this method are usually performed during bridge rating procedures. The simulated and experimental example studies for one-span simple bridge structure were performed to investigate the suggested measurement and identification technique. The identified results show that the method is simple and accurate enough to evaluate damages.

부분구조추정법을 이용한 시간영역 구조안전도 모니터링

이형진 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-

In this paper, a substructural identification method is presented for the local damage assessment of complex and large structural systems. For this purpose, an auto-regressive and moving average with stochastic input (ARMAX) model is derived for a substructure to process the measurement data impaired by noises. Using the substructural methods, the number of unknown parameters for each identification can be significantly reduced, hence the convergence and accuracy of estimation can be improved. Secondly, for the damage assessment, the indirect estimation procedure was applied to estimate the damage index defined as the ratio of the current stiffness to the vaseline value at each element using previously estimated results from the substructural identification. To demonstrate the proposed techniques, several simulation and experimental example analyses are carried out for structural models of a 2-span truss structure and 3-story building model. The results indicate that the present substructural identification method and damage estimation methods are effective and efficient for local damage estimation of complex structures.