• 가족자원경영과 정책
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• 제13권3호
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• pp.59-84
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• 2009

The purpose of this study was to investigate the determinants of policy demand for elderly care in aged Korea. The data from the first wave of KLoSA (Korean Longitudinal Study of Ageing) aged over 45 were used (n=10,165). The major findings were as follows: First, human capital, social capital, and socioeconomic variables influenced on the expected demand for elderly care by government, controlling the expectations of future life and society. Second, the effects of determninants on the expected demand for elderly care by government varied by the level of human capital, social capital, and socioeconomic variables, including ADL and IADL, familial support by children, public transfers, and age. Based on the empirical results, the implications for welfare mix of elderly care were provided.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 1993년도 추계학술대회발표논문집; 서강대학교, 서울; 25 Sep. 1993
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• pp.185-190
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• 1993

In this paper, we investigate the effect of production uncertainty - especially demand fluctuation and activity time variation, to production control policies. First, we examine three famous production control policies, namely, MRP, JIT, OPT, from shop floor control perspective and analyze the difference among them. Based on these, simulation studies are performed to draw out the effects of demand fluctuation which are classified into demand lumpiness and demand irregularity, and, the effects of activity time variation which are classified into standard time variation and non-standard time variation. Experimental investigation shows that, in terms of demand fluctuations, MRP is affected by demand lumpiness, but JIT by demand irregularity. And we also see that both MRP and JIT are influenced by standard time variation with respect to activity time variations.

• 한국산학기술학회논문지
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• 제17권1호
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• pp.234-243
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• 2016

보육시설에서 발생한 응급상황에서의 최초반응자로서 교사의 역할이 중요하다. 이에 본 연구는 유치원 및 어린이집 교사들의 응급처치 수행자신감과 교육요구도를 파악하여 효과적인 응급처치 교육을 위한 기초자료를 제공하고자 시도되었다. 연구대상은 일부 지역의 유치원과 어린이집 교사이며 2015년 3월 5일부터 31일까지 설문조사를 시행하였으며, 최종적으로 분석된 자료는 149부이다. 자료 분석을 위해 SPSS win PC 21.0을 이용하여 t-test, ANOVA, 로지스틱 회귀분석을 실시하였다. 응급처치 수행자신감은 대체로 낮았으며(평균 2.70점), 응급처치 시행의사가 있는 경우 수행자신감이 유의하게 높았다(p=.002). 응급처치 교육요구도는 대체로 높았으며(평균 4.04점), 특히 응급상황 경험이 있는 경우(4.21점, p=.006), 재직 중 응급처치 교육을 이수한 경우(4.14점, p=.001)에 유의하게 높았다. 따라서, 유치원 및 어린이집 교사를 대상으로 시행하는 응급처치 교육 시 빈도가 높은 응급상황을 고려하여 수행자신감이 낮은 응급처치 항목과 교육요구도가 높은 응급처치 항목을 고려한 정기적인 맞춤형 응급처치 교육이 필요하다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.162-164
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• 2004

Electrical power peak demand of Republic of Korea is annually growing and the peak demand has occurred in the summer. It is difficult that we handle with constructing power plants and increasing generation capacity to cope with a suddenly increased demand due to the cost problem, difficulty to find the new plant site, and the spread of the NIMBY. The alternative of the above problem is to efficiently manage demand of electrical power. Accordingly, load shedding of a section of demand side management is investigated. First we surveyed a trend of research in the domestic and overseas, for load curtailment and demand response program. After reviewing several demand response programs, the future research direction for load shedding in emergency and normal operation is introduced.

• 대한안전경영과학회지
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• 제18권4호
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• pp.161-169
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• 2016

In this research, we propose efficient demand forecasting scheme for intermittent demand. For this purpose, we first extensively analyze the drawbacks of the existing forecasting methods such as Croston method and Syntetos-Boylan approximation, then using these findings we propose the new demand forecasting method. Our goal is to develop forecasting method robust across many situations, not necessarily optimal for a limited number of specific situations. For this end, we adopt combining forecasting method that utilizes unbiased forecasting methods such as simple exponential smoothing and simple moving average. Various simulation results show that the proposed forecasting method performed better than the existing forecasting methods.

• 한국항공운항학회지
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• 제28권4호
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• pp.147-153
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• 2020

This study analyzed the outlook for aviation demand for the recovery of the aviation industry, focusing on airlines facing difficulties in management due to the Covid-19 crisis. Although the timing of the recovery in aviation demand is uncertain at the moment, this study is based on prior research related to Covid-19 and forecasts by aviation specialists, and analyzed by SWOT technique to a group of aviation experts to derive and suggest implications for the prospects of aviation demand. Looking at the implications based on the analysis results, first, customer trust to prevent infection should be considered a top priority for recovering aviation demand. Second, promote reasonable air price policy. Finally, it seeks to try various research and analysis techniques to predict long-term aviation demand to overcome Covid-19.

• 산업공학
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• 제22권4호
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• pp.368-375
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• 2009

This paper considers a two-stage supply system consisting of two make-to-stock facilities. The facility in the first stage produces a single type of component in anticipation of future demands from the market and the end item production while the facility in the second stage produces the end item in anticipation of future demands from the OEM customers. The facility in the first stage has the option of to accept or reject each incoming demand from the market. In this paper, we address the problem of how to control the exogenous component demand and how to manage the production of the end item and the component so as to maximize the system's profit subject to the system costs. In this paper, we present a heuristic policy that is the base-stock production policy combined with a linear switching curve for component demand control. Numerical study is implemented under different operating conditions of the system and it shows that the performance of the heuristic is very promising compared to that of the optimal policy for the Markov model.

• 전기학회논문지
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• 제57권1호
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• pp.25-33
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• 2008

This paper presents a new approach of a evaluation of location marginal prices(LMPs) considering demand response resources in the competitive electricity market. The stabilization of the electric power supply and demand balance has been one of the major important activities in electric power industry. Recently, much attention is paid to the demand-side resources which are responsive to incentives or time-varying prices and existing power system planning and operation activities are incorporated with the so-called demand response resources. In this paper, we first present an analytical method for calculation of LMPs considering demand response resources and then break down the LMPs into three components. In this study, we assume that Korean power system consists of two major regions, one which is the metropolitan and the other is non-metropolitan region. In the case study, we have considered several LMPs cases with different use of locational demand response resource and we can obtain a locational signal to demand response resources. Also, the economics of demand response resources are evaluated, compared with the increase of transmission line capacity and of generation capacity.

• Journal of Electrical Engineering and Technology
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• 제12권4호
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• pp.1427-1434
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• 2017

Since the late 2000s, there has been growing preparation in South Korea for a sudden reunification of South and North Korea. Particularly in the power industry field, thorough preparations for the construction of a power infrastructure after reunification are necessary. The first step is to estimate the peak load demand. In this paper, we suggest a new peak demand estimation methodology by integrating existing correlation analysis methods between economic indicators and power generation quantities with a power supply interruption model in consideration of power consumption patterns. Through this, the potential peak demand and actual peak demand of the Nation, which experiences power supply interruption can be estimated. For case studies on North Korea after reunification, the potential peak demand in 2015 was estimated at 5,189 MW, while the actual peak demand within the same year was recorded as 2,461 MW. The estimated potential peak demand can be utilized as an important factor when planning the construction of power system facilities in preparation for reunification.

• 가정과삶의질연구
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• 제15권3호
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• pp.163-180
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• 1997

The purpose of this study were to identify the differences between the demand for education program and the demand for counseling program of family welfare and to analyze the relation between demographic characteristics and the demand for family welfare service program For these purposes, total sample of 909 women those residing in Seoul, Inchon, Taejun, Taegu, Pusan, Kwangju, Chungju, Junju and Choonchun, were selected. Statistics were frequencies, means, percentile, cross-tabulation, t-test and Anova. The results were as follows. First, in family welfare service program on children and adolescents, the improvement in family living, consumption, retirement planning, health management, protection of environment and resource, volunteering and the advance of living culture, the demand for education program were higher than the demand for cunseling program. In particular, demands for both education program and counseling program on children and adolescents were the highest. Second, age, residence and income had very significant effects on the demands for both education program and counseling program. By understanding these differences in the demand for education program and counseling program of family welfare, practitioners and educators may be able to develop family welfare service program to solve family problems.