• Journal of the Korea Safety Management & Science
• /
• v.12 no.1
• /
• pp.59-62
• /
• 2010

At the present time, Musculo-Skeletal Disorders breaks out and it is increased in a high speed. It is a serious problem for the labors and managements. People becoming greatly interested in it. It is caused by the labor intensity which is according to the work form, hours of labor, and the labors and the labor unions have a correct understanding in it, and the labor powers becoming older, and the change of divisional social environment which is latent. Before working do the simple preparation gymnastics or operate insensitive exercise remedy without scientific verification only in the present circumstances. Although operate the Work-related Musculo-Skeletal Disorders exercise remedy, it can not get a sufficient effectiveness. So the study develop one type of exercise remedy which are divided the upper limbs exercise remedy, the trunk exercise remedy, the lower limbs exercise remedy. It can be done without using any exercise equipments and regardless places. We should also enable the exercise remedy to be easily applied to workers who are in different circumstances. To use EMG to measure the burden of exercise remedy. By doing so, employees can easily do exercises and it will help to prevent and even can treat MSD. It is just the objective of the research.

• Journal of Korean Academy of Nursing
• /
• v.14 no.2
• /
• pp.28-37
• /
• 1984

The purpose of this study is to propose the baseline data for developing the stress measurement tool for staff nurses working in the hospital. Two hundred and fifteen stan nurses in Seoul National University Hospital were participated during the period from Feb. 28 to Mar. 10, 1984. Though the pretest and literature review a questionnaire was constructed with 63 stressors which were experienced by the nurses in the hospital. Subjects were given instruction to rate 1∼6 likert type scale according to the level of stress experienced by each stressor described. Reliability of the tool was tested by Cronbach's Alpha, and the result was α=0.94871. Factor analysis was applied to organize 63 items together. As the result, 15 factors were obtained and these factors explained 66.3% of variance. The 15 factors were: 1) Work overload 2) Role conflict as a profession 3) Lack of professional knowledge and skill 4) Interpersonal problem 5) Conflict in nurse doctor relationship 6) Work conflict with doctors 7) Emotional burden due to the limitation of medicine 8) Poor treatment 9) Unsatisfactory relationship with supervisor 10) Low reward 11) Unsatisfactory relationship with subordinate 12) Poor physical environment of unit 13）Responsibility for extra affairs 14）Unfamiliar situation 15）Night duty.

• Korean Journal of English Language and Linguistics
• /
• v.1 no.2
• /
• pp.227-242
• /
• 2001

It is noted that although the current state of development of web-based English education (hereafter referred to as WBEE) might not meet the criteria some educators have set for themselves in the field, students certainly seem to prefer studying in a web-based and computer-assisted learning environment. This kind of demand is fueling the drive to develop more suitable variations of WBEE. In order for WBEE to work out, a teacher should be a multifunctional type of instructor handling responsibilities such as the role of scriptwriter to create text, act as technician for the sound mixing and recording, preside over online chat rooms and discussion boards, and finally, as webmaster to maintain the site and supervise all academic/ clerical work related to the course. Therefore, it is suggested that WBEE be accompanied by a small personnel to divide the labor and lessen the burden on the actual teacher. Finally, it is noted that the traditional relationship between students and teacher may no longer be sustainable since WBEE does not provide the face-to-face style of class discussion and office hours in its current form. Until the technology is fully developed to compensate for these kinds of differences, it is an immediate challenge to provide other more compelling reasons for students to participate in WBEE.

• Journal of the Ergonomics Society of Korea
• /
• v.29 no.4
• /
• pp.687-691
• /
• 2010

Workload assessment is one of the important elements of the human factors evaluation for the nuclear power plants in operation. This paper describes a further study upon the additional elements of the workload which elements should be considered in the subjective workload assessment. We have tried to predict the burden of the work and to improve the work through a comparison of the objective workload and the subjective workload in the previous studies in nuclear power plants. However, there is a restriction to perform a precise assessment because of the limitations of the method itself. The objective workload assessment is performed by relative comparison using the quadrant analysis with objective workload and subjective workload because there were no clear criteria of objective workload assessment. And the subjective workload assessment is performed by NASA-TLX (NASA Task Load Index) which includes six evaluation dimensions of subjective workload. NASA-TLX is difficult to grasp the other aspects that could influence on the subjective workload because the analysis relies on predetermined assessment items. We conduct a factor analysis between the factors that affect the workload and the assessment adopted from ISO 10075 and NASA-TLX. At the same time, this study suggests other evaluation elements which can be added for subjective workload assessment except for evaluation elements of NASA-TLX.

• Proceedings of the Korean Nuclear Society Conference
• /
• 1995.10a
• /
• pp.191-196
• /
• 1995

The intelligent human-machine interface (HMI) has been developed to enhance the safety and availability of a nuclear power plant by improving operational reliability The key elements of the HMI are the large display panels which present synopsis of the plant status and the compact, digital work stations for the primary operator control and monitoring functions. The work station consists of four consoles such as a dynamic alarm console (DAC), a system information console (SIC), a computerized operating-procedure console (COC), and a safety related information console (SRIC). The DAC provides clean alarm pictures, in which information overlapping is excluded and alarm impacts are discriminated, for quick situation awareness. The SIC covers a normal operation by offering all necessary plant information and control functions. In addition, it is closely linked with the DAC and the COC to automatically display related system information under the request of these consoles. The COC aids the operator with proper emergency operation guidelines so as to shutdown the plant safely, and it also reduces his physical/mental burden by automating the operating procedures. The SRIC continuously displays safety related information to allow the operator to assess the plant status focusing on plant safety. The proposed HMI has been validated and demonstrated with on-line data obtained from the full-scope simulator for Yonggwang Units 1,2.

• Journal of Korean Institute of Industrial Engineers
• /
• v.41 no.6
• /
• pp.551-558
• /
• 2015

The purpose of this paper is to investigate the development of mechanical projectile transfer system to prevent musculoskeletal problems in the firing test range. Prior to 2010, the projectile has been transferred from the worktable to the loading device of 155mm K9 fixed-type artillery by manual. Because the amount of firing test has been increased drastically since 2010, two types of mechanical projectile transfer system were developed to prevent musculoskeletal problems. The NIOSH lift equation and the working posture assessment system such as OWAS, RULA and REBA were used to evaluate the appropriacy of working weight and posture by manual transfer of projectile. The configuration and operation procedure of projectile transfer systems which were developed to improve work efficacy and to reduce the burden of manual transferring were described. The improvements were assessed by the number of processes, the tact time and the working posture assessment for operation of this system by comparing to the manual transfer of projectile.

• International Journal of Aeronautical and Space Sciences
• /
• v.11 no.4
• /
• pp.326-337
• /
• 2010

This work addresses problems regarding trajectory planning for unmanned aerial vehicle sensors. Such sensors are used for taking measurements of large nonlinear systems. The sensor investigations presented here entails methods for improving estimations and predictions of large nonlinear systems. Thoroughly understanding the global system state typically requires probabilistic state estimation. Thus, in order to meet this requirement, the goal is to find trajectories such that the measurements along each trajectory minimize the expected error of the predicted state of the system. The considerable nonlinearity of the dynamics governing these systems necessitates the use of computationally costly Monte-Carlo estimation techniques, which are needed to update the state distribution over time. This computational burden renders planning to be infeasible since the search process must calculate the covariance of the posterior state estimate for each candidate path. To resolve this challenge, this work proposes to replace the computationally intensive numerical prediction process with an approximate covariance dynamics model learned using a nonlinear time-series regression. The use of autoregressive time-series featuring a regularized least squares algorithm facilitates the learning of accurate and efficient parametric models. The learned covariance dynamics are demonstrated to outperform other approximation strategies, such as linearization and partial ensemble propagation, when used for trajectory optimization, in terms of accuracy and speed, with examples of simplified weather forecasting.

• Journal of Korean society of Dental Hygiene
• /
• v.12 no.1
• /
• pp.67-79
• /
• 2012

Objectives : The study was carried out to find out the experience of musculoskeletal disorder symptoms of dental hygienists and evaluate the risk with ergonomic evaluation method(RULA). Methods : The subjects in this study were 344 dental hygienists working at dental clinics and general hospitals in Seoul, Gyeonggi, Daejeon and Chungnam/Chungbuk. The data were collected through the self-questionnaire survey from July 26th 2010 to September 30th 2010. Results : The results showed that those who working at dental hospital, network dental clinics, with 1-5 years of clinical experience, long working hour and sitting hour, no rest hour, more physical and mental burden had higher rate of the experience of musculoskeletal disorder symptoms compared with other groups. The final score of RULA evaluation results was 6 on average requiring continuous observation and urgent demand for work improvements. According to the result of RULA evaluation by work, the orthodontic clinics were 4.5, prosthodontic clinics were 5.0, and dental surgery clinics were 6.8 being the most risky. Conclusions : The study showed high complaints rate on musculoskeletal disorders in dental hygienists. Thus, various measures including provision of proper working and rest hours, use of ergonomic working equipments, strengthening the health education for desirable working posture and the development of musculoskeletal disorder prevention program should be needed.

• Journal of the Korean Home Economics Association
• /
• v.49 no.5
• /
• pp.81-96
• /
• 2011

This study analyzed the time use of dual income paid workers. The data was selected from the '2009 Korean Time Use Survey' by the Korean National Statistical Office. There were 2799 respondents who were paid workers with dual income. There were big differences in time use between men and women. The result showed that men's time allocation focused on 'labor and leisure' and women's time allocation focused on ‘labor and housework'. This means the women among dual income paid workers faced difficulties in dual burden of work-family balance. Regression analysis on time use dividing men and women showed that age, education, income, working type and the presence of preschool children had significant effects on time allocation. We found the income effects on time use which reduced paid working time and increased housework and leisure time. Significantly, younger men who have preschool children spend more time in housework. We could find the possibility of a change in men's time allocation.

• Korean Parent-Child Health Journal
• /
• v.11 no.1
• /
• pp.73-83
• /
• 2008

Purpose: This study was to verify the effectiveness of group program for promoting empowerment and self-advocacy of the the mentally disabled persons' families. Methods: This program was set up for the mentally disabled persons' families to share their experiences, do consciousness raising, advocate themselves through group process. A pre-post control group design was used for this study. Results: The results of this study verified that group program was effective to promote empowerment and self advocacy of the mentally disabled persons' families. Also group program helped to express and ventilate family burden actively. Conclusion: This study suggests as follows. In the mental health social work practice we need to develop group programs for family to talk about themselves, to ventilate their emotions, to understand their circumstances and to initiative the change of mental health circumstances as well as education and coping skills about mental illness. For this, there is a need for mental health social worker to have a macroscopic viewpoint and work with family. Also there is a need for mental health social worker to promote family self-help groups and to support their construction and growth.