• 제목/요약/키워드: work demand

검색결과 1,278건 처리시간 0.034초

Study for Planning and Guideline for Select the Reasonable Mountainous Light Rail Transit System (산악용 경전철의 계획 및 시스템 선정에 관한 고찰)

  • Lee, Duck-Young;Lee, An-Ho
    • Proceedings of the KSR Conference
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    • 한국철도학회 2008년도 춘계학술대회 논문집
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    • pp.1683-1688
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    • 2008
  • These days, in Korea, according to improving the standard living, people generally work 5 days a week and it results more leisure hours. On weekends or in specific season, travel to mountain region around the major city is much in demand, and, in case of public transportation, the demand exceeds the supply. So, people tend to go other places, even overseas, for their holidays. The situation in Korea reflects the needs for mountainous light rail transit system with the object of convenient and rapid transport of passengers. In this paper, the guideline for mountainous light rail transit planing is proposed, and the representative mountainous light rail transit system is analyzed to choose the proper mountainous light rail transit system which adapts the demand for transportation and the terrain in Korea.

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Design of Cellular Manufacturing System with Alternative Process Plans under Uncertain Demand (수요가 불확실한 환경에서 대체공정계획을 고려한 셀형제조시스템 설계)

  • Ko, Chang-Seong;Lee, Sang-Hun;Lee, Yang-Woo
    • Journal of Korean Institute of Industrial Engineers
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    • 제24권4호
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    • pp.559-569
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    • 1998
  • Cellular manufacturing system (CMS) has been recognized as an alternative to improve manufacturing productivity in conventional batch-type manufacturing systems through reducing set-up times, work-in-process inventories and throughput times by means of group technology. Most of the studies on the design of CMS assumed that each part has a unique process plan, and that its demand is known as a deterministic value despite of the probabilistic nature of the real world problems. This study suggests an approach for designing CMS, considering both alternative process plans and uncertain demand. A mathematical model is presented to show how to minimize the expected amortized and operating costs satisfying these two relaxations. Four heuristic algorithms are developed based on tabu search which is well suited for getting an optimal or near-optimal solution. Example problems are carried out to illustrate the heuristic algorithms and each of them is compared with the deterministic counterpart.

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Design of a renewable energy system with battery and power-to-methanol unit

  • Andika, Riezqa;Kim, Young;Yun, Choa Mun;Yoon, Seok Ho;Lee, Moonyong
    • Korean Journal of Chemical Engineering
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    • 제36권1호
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    • pp.12-20
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    • 2019
  • An energy storage system consisting of a battery and a power-to-methanol (PtM) unit was investigated to develop an energy storage system for renewable energy systems. A nonlinear programming model was established to optimize the energy storage system. The optimal installation capacities of the battery and power-to-methanol units were determined to minimize the cost of the energy system. The cost from a renewable energy system was assessed for four configurations, with or without energy storage units, of the battery and the power-to-methanol unit. The proposed model was applied to the modified electricity supply and demand based on published data. The results show that value-adding units, such as PtM, need be included to build a stable renewable energy system. This work will significantly contribute to the advancement of electricity supply and demand management and to the establishment of a nationwide policy for renewable energy storage.

The Rearch Of Method in the Appropriate number of Demand and Supply of OMD (한의사인력(韓醫師人力) 공급(供給)의 적정화방안(適定化方案) 연구(硏究))

  • Lee, Jong-Soo
    • The Journal of Korean Medicine
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    • 제19권1호
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    • pp.299-326
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    • 1998
  • 1. Comparison of demand and supply A. Assumption of estimation of demand and supply we will briefly assumptions used for presumption once more before comparing the result of estimation of demand and supply examined previously 1) supply - The average applying rate for state. examination of graduate: ${\alpha}$=1.03109 - The ratio of successful applicants of state examinations: ${\beta}$=0.97091 - Mortality classified by age : presumed data of the Bureau of statistics - Emigrating rate: 0 % - Time of retire: unconsidered - An army doctor number: unconsidered and regard number of employed oriental medicine doctor. - Standard of 1995 : The number of survival oriental medicine doctor is 8195. the number of employed oriental medicine doctor is 7419. 2) demand - derivated demand method Daily the average amount of medical treatment: according to medical insurance federation data. there is 16 or 6 non allowance patient, we consider amount of medical treatment as 22 persons in practical because 21.94 persons (founded practical examination) are converted to allowance in comming demand. Daily the proper amount of medical treatment: 7 hours form -35 persons 5 hours 30 minutes form -28 persons. Yearly medical treatment days: 229 days. 255 days. 269 days . Increasing rate of visiting hospital days: -1996 year. 1997 year. 1998 year- . Rate of applying insurance: yearly average 71.51% (among the investigated patient) B. Comparison of total sum result 1) supply (provision) Table Ⅳ-1 below shows the estimation of the oriental medicine doctor in the future.

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  • Gender Specific Comparison of the Influencing Factors on Health Status among Service Workers (서비스업 근로자의 건강수준에 영향을 미치는 요인 성별 비교)

    • Kim, Souk Young;Kim, Hee-Jeong;Kim, Jeong-Hee
      • Korean Journal of Occupational Health Nursing
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      • 제17권2호
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      • pp.191-201
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      • 2008
    • Purpose: The purpose of this study were to investigate the health status and to identify the influencing factors on health status by gender among service workers. Method: Data were collected from the self-reported survey of 781 service workers in sales, food & lodging industry. The data were analyzed by descriptive statistics and multiple linear regression analysis using SPSS Win 10.0. Result: The influencing factors of male workers' health status were job satisfaction, standing hour during work time, physical work environment, job demand and family support. The influencing factors of female workers' health status were job satisfaction, emotional labor, physical work environment, regular exercise, standing hour during work time, social support and age. Conclusion: Gender specific occupational Health program for service workers should be developed in consideration of these influencing factors.

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    Men's Work Role and Transition to Fatherhood : Does Transition Timing Matter (남성의 부모기로의 전이와 직업역할 : 전이시기와의 관련성을 중심으로)

    • 한경혜
      • Journal of the Korean Home Economics Association
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      • 제34권2호
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      • pp.231-244
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      • 1996
    • The purpose of this study was to investigate the interrelationship between work role and fatherhood role of young men who experienced the transition to fatherhood within the last two years. The effect of transition timing on the relationship between work role and fatherhood was also explored. In-depth, qualitative data were gathered from thirty men. The results showed that there exist differences in socio-demographic characteristics among timing groups. Differences were also found in the nature of career demand between 'late' fathers and 'early' or 'on-time' fathers. However, no clear effects of timing of fatherhood on men's parenting behavior and attitude toward fathering and the relationship between work role and fatherhood were found.

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    A Study of Activities and Demand on Welfare Nursing in Korea (사회복지분야의 간호활동실태 및 간호수요에 관한 연구)

    • Kim, Young-Im
      • Research in Community and Public Health Nursing
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      • 제7권2호
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      • pp.203-215
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      • 1996
    • Social security is concerned with ensuring all citizens maintain basic needs, community health nursing maintains and promotes health for all community members. Lately, This new area of community health nursing, concern social welfare has increased. The objectives of this study are, first, to analysis the activities of nurses at community social welfare institutes, second, to estimate nursing demand for social welfare areas. The study methods used were as literature review, an analysis of statistical data and case study etc. The analytical framework also included a demand analysis of nursing manpower in community social welfare areas. The major results are as follows; 1. Employees which work at social welfare institutes number 55,464, nursing manpower (including nurse aids) number 1,458 and this is 3% of the total employees. Within nursing manpower, nurses number 780, nurse aids number 670. 2. The rates of nurses among total employees were high in institutes for mental disorders and institutes for the age. 3. The salary level of nurses was lower than average and the rates of retirement showed a roughly middle level in welfare institutes. 4. The satisfaction level of nursing services was high, and it is the trend that nurses substitute for nurse aids which retire at social welfare institutes. 5. Nurse demand that follows legal criteria is 2,221, but only 35% are working. It is therefore insufficient from the minimum of 733 to a maximum 1433. 6. The sufficiency rates by institution were high at institutes for vagrants, aged and the handicapped. In conclusion, the conditions are of nurses which are working in with the social welfare institutes are poor. Also the number of nurses compared rates of demand were in surplus. But, the basic direction of welfare policy is universal-preventive and provision of the family and of community centered service, and nursing service demand in the social welfare institute will increase continuously, we predict. Therefore, we will need a positive plan such as the development of an inservice education program and the construction of an information collection system etc.

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    Overseas Research and Development Activities of Korean ICT enterprises in Emerging Countries

    • Seo, Jeongseon
      • STI Policy Review
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      • 제3권2호
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      • pp.79-91
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      • 2012
    • With the globalisation of the world's economies and the increasing role of multinational corporations in the generation of knowledge, global research and development (R&D) activities in emerging countries are following a new trend. This paper describes case studies of two large companies and discussion of the motives (demand vs. supply) and tasks (demand-driven vs. supply-driven) of R&D activities outside their home country. This work is based on an analysis of four overseas R&D units of two Korean ICT companies - here, ICT refers to goods and services in the information technology and communication technology fields - in India and China. The research findings are as follows: (1) The overseas R&D activities of Korean ICT enterprises in emerging countries may be driven by a combination of demand and supply factors of host countries; and (2) Korean overseas R&D centres in emerging countries may need to carry out both demand- and supply-driven tasks in view of the overlap between demand and supply factors of the host countries. Based on the results of this research, the following policy implications can be drawn for encouraging more effective overseas R&D activities of Korean enterprises in emerging countries. First, the government needs to expand the support systems so that enterprises can manage local R&D centres more effectively and actively use the variety of local support systems and useful information. Second, the government needs to expand the support systems so that the overseas R&D centres of Korean enterprises revitalise collaborations with locally excellent universities and research institutions.

    A Study on the Possibilities of PRT Applications (소형궤도차량(PRT)의 국내 적용시 정책적 검토 사항 연구)

    • Lee, Jin-Sun;Kim, Kyoung-Tae
      • Journal of the Korean Society for Railway
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      • 제12권4호
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      • pp.526-534
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      • 2009
    • PRT(Personal Rapid Transit) can be described as a system of driverless taxicabs, that. automatically take passengers to their destinations along dedicated guideways, without intermediate stops.It is ideally suited as a short feeder transportation for on-demand circulation operations at train stations, airports, office complex, amusement park and shopping center. This PRT study do suggest that a PRT system could provide a high level of mobility to the commuters making work trips, workers making work, shopping and other non-work trips, residents making shopping and other non-work trips and recreational riders.This study presents the possibilities of PRT applications in national level. As the technology continues to advance, there may be opportunities to improve the reliability, and efficiency of our future public transportation systems.

    The Effect of Work Environmental Factors on Job Stress in the Golf Caddies (골프경기보조원의 업무환경요인이 직무스트레스에 미치는 영향)

    • Heo, Kyung-Hwa;Jeong, Jin-Wook;Koo, Jung-Wan;Kim, Ki-Woong
      • Korean Journal of Occupational Health Nursing
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      • 제15권2호
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      • pp.133-143
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      • 2006
    • Purpose: The purpose of this study was to examine the relationship between perceived job stress and work environmental factors related with socioeconomics factors and physical burden in the golf caddies. Methods: Job stress in golf caddies was estimated by using the Karasek's job content questionnaire (JCQ) and work environmental factors were estimated by self-reported questionnaire and interview. Results: The subjects were 316 woman caddies who had never been occupationally exposed to hazardous chemicals, was mean age 31.1 years. Mean work duration was 6.44 years and working hours per day on low- and high-demand season were 6.16 and 10.51, respectively. The golf caddies displayed higher scores of job stress due to multiple factors such as working hours and frequency of rounding per week, physical burden, confliction, income satisfaction and employment stability. We found that high strain group was positive correlation with age, career, working hour (including frequency of rounding) and job demand, however, showed negative correlation with job decision latitude and support of supervisor and coworker. Conclusion: In conclusion, we suggest that the golf caddies be regard divided into high strain group as appropriate. Thus, stress management and health promotion program for golf caddies should be developed.

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