• Korean Institute of Interior Design Journal
• /
• no.13
• /
• pp.96-101
• /
• 1997

The purpose of this study was to examine the current office work environment and suggest the needs for improvement the quality and efficiency of work. To fulfill this task, information describing various environmental conditions was gathered from generally large offices in Pusan and Major cities in Kyoungnam. Data were collected on questionnaire's general information, lighting, air quality, temperature, health problems, noise and equipment arrangements, and the size fo workspace. The extent to which the attitudes and behaviors of workers were related to these environmental conditions was then examined and scrutinized. According to the development of office automation, the interest in improvement of office environment become increased. Workstation size, individual environmental control, health care, adequate storage space and noise control should be recognized as critical to the worker's environmental satisfactiov. Finally, based on the results of this study, a number ofrecommendations can be made for alleviating some of the problems that have been identified. Designers should be interested in knowing if their environments actually function in the manner in which they were intended.

• Journal of Families and Better Life
• /
• v.8 no.2
• /
• pp.87-100
• /
• 1990

This study was carried out in an attempt to establish a preliminary scale for measuring $\boxDr$Quality of Life$\boxUl$ of Korean farm households, Data from randomly selected 318 farm households through our the country were analysis. The main results of this study were summarized as follows; 1) The objective levels of living conditions were relatively low in dietary life, healthy & sanitation, and financial stability and were relatively high in family relationship, household work and housing environment. 2) The subjective satisfaction level was lowest in leisure and were relatively high in family relationship and health & sanitation. 3) A comparison of objective level of living conditions and subjective satisfaction level suggested th score of the latter were higher than the former in dietary life and health & sanitation. In the contrary to this, the scores of the former were higher than the latter in housing environment, household work, child education, leisure and family relationship. In particular, the score of the subjective satisfaction level were much higher in housing environment and household work.

• Journal of the Korea Safety Management & Science
• /
• v.6 no.3
• /
• pp.53-64
• /
• 2004

Repetition Strain Injury (RSI) is usually caused or aggravated by poor work processes and unsuitable working conditions - that involve repetitive or forceful movements or the maintenance of constrained or awkward postures. The condition is characterized by discomfort and persistent pain. There are three essential steps to eliminate or control hazards In workplace. Case and Demographic Characteristics for Work-related Injuries and illnesses Involving Days Away From Work, 2002. U.S' was examined. Causes of press operators' RSI were carpal tunnel syndrome(CTS), tendonitis, low back pain, and occupational stress. Recommendations for improvement of productivity are redesign of working conditions, exercise, prevent of RSI and avoiding stress.

• Journal of the Korean Society for Precision Engineering
• /
• v.15 no.7
• /
• pp.61-68
• /
• 1998

The form accuracy of parts has become an important parameter. Therefore, dimensional tolerance and geometric tolerance are used in the design stage to satisfy required quality and functions of parts. But the informations on the machining conditions, which can satisfy the assigned geometric tolerance in design, are insufficient. The objectives of this research are to study the effects of the grinding parameters such as traverse speed, work speed, depth of cut, and dwell time on the after-ground workpiece shape, and to find out the major parameters among them. The results are as follows, The effects of work speed and depth of cut on workpiece shape are negligible compared with the effect of traverse speed. There is an optimal dwell time depending on the traverse speed. The optimal dwell time is decreasing as the traverse speed is increased.

• Structural Engineering and Mechanics
• /
• v.73 no.1
• /
• pp.97-108
• /
• 2020

This study presents a 4 node, 11 DOF/node plate element based on higher order shear deformation theory for lamina composite plates. The theory accounts for parabolic distribution of the transverse shear strain through the thickness of the plate. Differential field equations of composite plates are obtained from energy methods using virtual work principle. Differential field equations of composite plates are obtained from energy methods using virtual work principle. These equations were transformed into the operator form and then transformed into functions with geometric and dynamic boundary conditions with the help of the Gâteaux differential method, after determining that they provide the potential condition. Boundary conditions were determined by performing variational operations. By using the mixed finite element method, plate element named HOPLT44 was developed. After coding in FORTRAN computer program, finite element matrices were transformed into system matrices and various analyzes were performed. The current results are verified with those results obtained in the previous work and the new results are presented in tables and graphs.

• Design & Manufacturing
• /
• v.13 no.2
• /
• pp.12-16
• /
• 2019

For optimal injection molding, various molding conditions should be combined well. Therefore, engineers should be thoroughly familiar with mold design, fabrication, and injection molding. The choice of resin among the various molding conditions is closely related to the productivity of the molded part and the deformation after molding, so the engineer must select the appropriate resin. Engineers work on the basis of data provided by resin manufacturers during molding. However, in actual molding work, it is necessary to apply values slightly different from those provided to obtain molded articles of desired performance. In this study, various deformations of molded products were compared with respect to crystalline resin and amorphous resin when molded according to the data provided by the resin maker and molded at the changed values at the work site.

• Journal of Industrial Convergence
• /
• v.4 no.1
• /
• pp.3-15
• /
• 2006

Musculoskeletal Disorders are usually caused or aggravated by poor work processes and unsuitable working conditions - that involve or repetitive or forceful movements or the maintenance of constrained or awkward postures. The condition is characterized by discomfort and persistent pain. Case and Demographic Characteristics for Work-related Injuries and Illnesses Involving Days Away From Work, 2004. U.S" was examined. Causes of musculoskeletal disorders for assembly line workers were carpal tunnel syndrome(CTS), tendonitis, low back pain, and occupational stress. Recommendations of improvement for productivity are redesign of working conditions, exercise, prevent of musculoskeletal disorders and avoiding stress.

• Korean Journal of Occupational Health Nursing
• /
• v.27 no.3
• /
• pp.171-179
• /
• 2018

Purpose: The purpose of this study was to examine the mental health and presenteeism of early childhood teachers and to explore the effects of working conditions and job satisfaction on these. Methods: Data from the 4thKorean Work Environment Survey were used. The sample consisted of 474 female early-childhood teachers from private facilities. Mental health was measured using the WHO-Wellbeing Index. Presenteeism was attributed to a participant upon indication that, during the past 12 months, she had ever attended work, despite being sick. The data by complex sample design were analyzed through the Rao-Scott $x^2$ test and logistic regression analysis. Results: 37.9% of early childhood teachers reported poor mental health and 34.2% had experienced presenteeism. Early childhood teachers in permanent employment, who did not work evening shifts, and with sustainable jobs, were more likely to have better mental health. Moreover, those in permanent employment and remunerated appropriately were less likely to experience presenteeism. Conclusion: Type of employment, number of days working in the evening, and job sustainability affect mental health. Further, type of employment, number of workers, and being well paid have an effect on presenteeism. We suggest that improved working conditions should precede the improvement of early-childhood teachers' mental health.

• Nuclear Engineering and Technology
• /
• v.47 no.3
• /
• pp.253-259
• /
• 2015

The fast neutron reactor BOR-60 is one of the key experimental facilities worldwide to perform large-scale tests of fuel, absorbing, and structural materials for advanced reactors. The BOR-60 reactor was put into operation in December 1969, and by the end of 2014 it had been operating on power for ~265,000 hours. BOR-60 still demonstrates potential capabilities to extend the lifetime of sodium-cooled fast reactors. The BOR-60 lifetime should have expired at the end of 2014. Over the past few years, a great scope of work has been performed to justify the possibility of extending its lifetime. The work included inspection of the equipment conditions, calculations and experimental research on operating parameters and the conditions of nonremovable components, investigation of the structural material samples after their long-term operation under irradiation, etc. Based on the results of the work performed, the residual lifetime was evaluated and the reactor operator made a decision to extend the lifetime period of the BOR-60 reactor. After considering both a set of documents about the reactor conditions and the positive decision of independent experts, the Regulatory Authority of the Russian Federation extended the BOR-60 operating license up to 2020.

• Journal of the Korea Safety Management & Science
• /
• v.13 no.4
• /
• pp.61-69
• /
• 2011

The hazard conditions on plant works of the steel industry have been investigated to efficiently prevent from industrial accidents. The plant works are eventually carried out by workers of smaller service companies where the safety management systems are not well established, on behalf of the main steel company. Based on the preliminary risk assessment on the plant working and open literature reviews, the safety management systems, which can be applied to the plant workplace of each process, are studied and then the step-by-step 4M check-list method is established. Accordingly, the risk assessment technique using 4M checklist for the plant workplace is proposed. In addition, a standardized flow-chart for safety management of plant work is introduced. These risk assessment technique and flow-chart can definitely contribute to the reduction of industrial accidents, considering the risk characterization and the unsafe conditions in small and medium-sized plant workplace, as effective safety management tools and safety guide line.