• Journal of Sensor Science and Technology
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• v.21 no.6
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• pp.456-460
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• 2012

Au/$SnO_2$ core-shell structure nanoparticles (NPs) were synthesized by microwave hydrothermal method, and the effect of working temperature on sensitivity of Au/$SnO_2$ core-shell NPs for CO gas was investigated. The $SnO_2$ shell layer was consisted of $SnO_2$ primary particles with 4.5 nm diameter. The response of Au/$SnO_2$ core-shell NPs for CO gas was maximized at the working temperature of $350^{\circ}C$ while the sensitivity increased with decreasing the working temperature due to the low grain size effect of $SnO_2$ NPs on the response of CO gas.

• Journal of Fashion Business
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• v.14 no.1
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• pp.132-142
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• 2010

The purpose of this case study was to design development of Working Uniform in 10 enterprises which were located in Changwon national industrial complex. The 10 enterprises were small-medium business in machinery. For finding actual conditions and preferences by employers, interview with employers was accomplished and their uniforms were collected. The uniforms were analyzed by Design elements ; shapes, colors, details. From the results, working uniforms were designed by each enterprise. The design was suggested CAD work sheets and send to each enterprise. After discussion and correction, design were made in fabric. Total 50 items(winter jacket and pants, spring & fall jacket and pants and summer T-shirts) were made by P/C, P/A and polyester coolon materials. The new designs have worn by the enterprises, now. This case study could be one of academic - industrial relationship cooperation.

• Journal of Physiology & Pathology in Korean Medicine
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• v.24 no.5
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• pp.877-882
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• 2010

This study was designed to investigate job stress, job satisfaction and related factors of oriental medical doctors. The survey used administered questionnaire, was conducted from June 10 to June 30, 2010 in Jeonbuk province. Questionnaire was composed of general characteristics, socioeconomic status perception, job stress scale and job satisfaction scale. Job stress was related to sex, age, marriage, working form, working time, clinical career. Job satisfaction was related to age. Working time, working form and self-status perception influenced job stress. Self-status perception influenced job satisfaction. Especially, it was supposed that working time was most important factor to job stress.

• Journal of the Korea Safety Management & Science
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• v.8 no.6
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• pp.13-27
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• 2006

The goal of this study is to propose the effective way of finding injurious factors and making improved plan that prevents the workers against musculoskeletal disorders at a semi-finished medical product fabricating company A questionnaire and an ergonomic assessment method were adopted to analyze the symptoms of workers' musculoskeletal disorders, and an analysis of working postures and a quantitative assessment on various processes were performed to find out harmful factors of workplace. Based on the result of the evaluation, to enhance the working environment, improvement of worktable, working space, tools, and outfit was suggested, and induction of mechanical system was also suggested. It can be concluded that the method and process described in this paper could be helpful for diagnosing the musculoskeletal disorders and making improvement plans to the company with similar working conditions and process.

• Korean Journal of Human Ecology
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• v.15 no.6
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• pp.985-997
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• 2006

In this study, we grasped the life time structure according to working woman's income using '2004 life time research' of Korea National Statistical Office. Concrete results are shown as follows. First, inspecting the difference of individual characteristic according to income, young women who have higher education level and larger house area had acquired more income. Second, in case of the difference of life time according to income, there was no difference of individual support time, while there was statistically significant difference of working hours, household affairs, leisure time and moving hours. Third, inspecting the individual time of working, household affairs, bringing up and leisure according to income, there was statistically significant difference by age, education level, sense of time oppression, and fatigue cognition. This individual difference was revealed more strongly in medium to low-ranked group.

• Journal of Information Processing Systems
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• v.14 no.2
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• pp.487-498
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• 2018

The purpose of the high-speed railway construction is to better satisfy passenger travel demands. Accordingly, the design of the train working plan must also take a full account of the interests of passengers. Aiming at problems, such as the complex transport organization and different speed trains coexisting, combined with the existing research on the train working plan optimization model, the multiobjective bi-level programming model of the high-speed railway passenger train working plan was established. This model considers the interests of passengers as the center and also takes into account the interests of railway transport enterprises. Specifically, passenger travel cost and travel time minimizations are both considered as the objectives of upper-level programming, whereas railway enterprise profit maximization is regarded as the objective of the lower-level programming. The model solution algorithm based on genetic algorithm was proposed. Through an example analysis, the feasibility and rationality of the model and algorithm were proved.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.14 no.3
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• pp.81-86
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• 2005

The agricultural working tractor of this study is equipped with 4 wheel driving system developed in study 1 and 4-type wheel steering system. The wheel steering system has four type of steering methods that are front wheel steering, rear wheel steering, 4 wheel steering with opposite phase, and 4 wheel steering with corresponding phase. This study introduces the hydraulic circuit of the 4-type wheel steering system and the construction of working tractor. Judging from the field test results of the developed working tractor, it is apparent that 4-type wheel steering system has many advantages when driving in a narrow corral.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2001.10a
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• pp.190-195
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• 2001

The piercing and blanking of thin sheet metal working is specified division in press die design and making. In order to prevent the defects, the optimum design of the production part, strip process layout, die design, die making and try out etc. are necessary the analysis of effective factors. For example, theory and practice of metal shearing process and it's phenomena, die structure, machine tool working for die making, die materials and it's heat treatment, metal working in field, their know how etc. are included in those factors. In this study, we analyzed whole of data base, theoretical back ground of metal working process, and then performed the progressive die tryout with the screw press.

• Transactions of the Korean Society of Automotive Engineers
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• v.12 no.3
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• pp.122-129
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• 2004

In plastic working, as working becomes speedy, automatic and working condition deteriorates, the increase of forging working has been remarkable. Therefore, we need the estimation of mold lift in detail, in order to counterplan of effective mold life extension. In this study, on the SKH51, mold steel which is forged by cold working and the KCW1, tool steel of low alloy, we estimated mold life on the base of FEM analysis and investigated mold lift by low cycle fatigue test. Also, this paper suggested a new method of estimation of mold lift.

• Korean Journal of Human Ecology
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• v.16 no.1
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• pp.49-59
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• 2007

The purpose of the present study was to examine how working females evaluated and perceived the employer-supported child care services, and how the evaluations and perceptions were different depending on their socio-demographic characteristics. A survey was administered to 164 working females, mostly, in professional jobs, to investigate their satisfaction to the employer-supported child care service and current child care policy. Major findings are as follows: Working females showed higher degrees of satisfaction on the employer-supported child care service and showed lower degrees of satisfaction on the current child care polidy. The more they work in professional jobs and the more they have high educational background, the more they showed satisfactions to the employer-supported child care services.