• The Transactions of the Korean Institute of Electrical Engineers A
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• v.52 no.2
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• pp.107-113
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• 2003

In a deregulated electric power market, a demand function to consider the characteristics of electric power consumers should be required. It is essential that the optimal power flow algorithm with object function of social welfare maximization using the demand function for a competitive electric power market is applied to resolve in a point of economic benefits as well as the security of power systems. Therefore, in this paper, we implement the optimization problem based on linear programming to consider the characteristics of electric power consumers using the demand function and analyze not only the nodal cost for generations and demands but also the variation of demands as a function of the characteristics of electric power consumers through numerical studies.

• Asia Marketing Journal
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• v.26 no.1
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• pp.23-30
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• 2024

Firms often engage in manipulating online reviews as a promotional activity to influence consumers' evaluation on their products. With the prevalence of the promotional activities, consumers may notice and discount the reviews generated by the promotional activities. Discounting the firm-generating reviews may cause systematic measurement errors in the valence variable and lead to a negative bias when estimating the effect of consumers' organic reviews on demand. To correct the bias, this study proposes including product-specific bias-correction terms representing the proportion of extreme reviews in analysis. For illustration, the proposed method is applied to a demand model for data of movies released in South Korea. The results confirm a negative bias in the estimate of the valence sensitivity of demand. The negative bias potentially leads to an underestimation of the magnitude of the contagion effect through social interactions, a key component of evaluating the value of a satisfied consumer.

• Journal of Digital Convergence
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• v.18 no.7
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• pp.21-29
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• 2020

This study aims to explore the characteristics of platform for social service delivery and the electronic voucher system as an instrument for the delivery. The paper discusses the concept and characteristics of platform and reviews the factors by which firms migrate to platform. Social service e-vouchers are an example of a government platform that pays e-vouchers to consumers and gives them the choice of services. Then it analyzes the case of platform establishment to deliver social services. The demand on welfare services has changed with demographic structure. The change in demand requires innovation in the social service delivery system and adoption of strategies to move to the platform. Factors that enabled the social service delivery platform to build both demand and supply sides include access to employment policies, industrial connection, workforce training, and requirements for social service eligibilities.

• Safety and Health at Work
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• v.11 no.4
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• pp.418-424
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• 2020

Background: According to the previous studies, the work-related accident rate decreased in Korea after the introduction of occupational health and safety management system (OHSMS), but there were several disasters in Korea such as subway worker's death at Guui station in 2016 and the Taean thermal power plant accident in 2018, which escalated the social demand for safety. In 2018, OHSMS became an international standard, as ISO45001 was announced. Methods: A survey was conducted to research the implementation status of OHSMS and changes in people's perception, and the results were compared with those of a past survey. Results: Enhanced social demand and various stakeholders' (not only buyer) needs, and social responsibility are perceived as the motivation for the introduction of OHSMS rather than legal compliance or customer demand. In the questionnaire about problems with the implementation of OHSMS, the factors with higher response rate in 2018 than 2004 were "excessive cost" and "complicated documentation management." In the questionnaire about how to promote OHSMS in organizations, most people answered "reduction of workers' compensation insurance rate" in 2004, but most people answered "exemption from health and safety supervision" in 2018. Conclusion: For the effective implementation of ISO45001, emphasis is placed on social demand, training to recognize health and safety as a part of management, and the reduction of certification and consulting costs to promote the introduction of OHSMS. Incentives such as insurance premium cuts and exemptions from health and safety supervision are needed.

• The Journal of Information Systems
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• v.26 no.3
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• pp.171-185
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• 2017

Purpose Recently, there has been an increase in attempts to analyze social phenomena, consumption trends, and consumption behavior through a vast amount of customer data such as web search traffic information and social buzz information in various fields such as flu prediction and real estate price prediction. Internet portal service providers such as google and naver are disclosing web search traffic information of online users as services such as google trends and naver trends. Academic and industry are paying attention to research on information search behavior and utilization of online users based on the web search traffic information. Although there are many studies predicting social phenomena, consumption trends, political polls, etc. based on web search traffic information, it is hard to find the research to explain and predict tourism demand and establish tourism policy using it. In this study, we try to use web search traffic information to explain the tourism demand for major cities in Gangwon-do, the representative tourist area in Korea, and to develop a nowcasting model for the demand. Design/methodology/approach In the first step, the literature review on travel demand and web search traffic was conducted in parallel in two directions. In the second stage, we conducted a qualitative research to confirm the information retrieval behavior of the traveler. In the next step, we extracted the representative tourist cities of Gangwon-do and confirmed which keywords were used for the search. In the fourth step, we collected tourist demand data to be used as a dependent variable and collected web search traffic information of each keyword to be used as an independent variable. In the fifth step, we set up a time series benchmark model, and added the web search traffic information to this model to confirm whether the prediction model improved. In the last stage, we analyze the prediction models that are finally selected as optimal and confirm whether the influence of the keywords on the prediction of travel demand. Findings This study has developed a tourism demand forecasting model of Gangwon-do, a representative tourist destination in Korea, by expanding and applying web search traffic information to tourism demand forecasting. We compared the existing time series model with the benchmarking model and confirmed the superiority of the proposed model. In addition, this study also confirms that web search traffic information has a positive correlation with travel demand and precedes it by one or two months, thereby asserting its suitability as a prediction model. Furthermore, by deriving search keywords that have a significant effect on tourism demand forecast for each city, representative characteristics of each region can be selected.

• Korean Journal of Social Welfare
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• v.44
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• pp.64-90
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• 2001

There has been a demand of changing service delivery system for social welfare services, and therefore changing is resource acquisition environment for community social welfare service organizations (CSWSOs). These phenomena are, however, not properly actualized through the CSWSOs. The discrepancy between environmental demand and organizational adaptation seems to result from our lack of understanding those organizations. Based on this understanding, several research problems have been formulated on resource acquisition behaviors of CSWSOs. Empirical data were gathered, and the final sample included 82 social welfare agencies of Pusan province and 122 top/high level agency administrators. The result of data analysis and their implications are as follows: (1) Most of CSWSOs prefer government grants to other financial resources, because government resources can give them more stability than others including private donations and user fees. (2) In order to induce changes in CSWSOs, their stability needs should be properly counted. (3) There is no enough evidence to prove that CSWSOs leaders' personal characteristics have contributed to the behavioral differences on financial resource acquisition among CSWSOs. Rather, there has been enough evidence to prove for influences by institutional environment factors. So, it is recommended that, in order to change behaviors of CSWSOs, the focus should be given to the proper control of those institutional environment factors.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2018.05a
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• pp.324-325
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• 2018

Recently, the supply and demand of aggregate in the Southeast region has been disrupted because supply of sea sand decreased due to discontinuation of collecting the EEZ aggregate in the southern sea. This study analyzed the Trends of Supply and Demand of Aggregate in the Southeastern Region of South Korea in order to find a solution these social problem.

• Journal of Advanced Navigation Technology
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• v.21 no.4
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• pp.313-324
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• 2017

At present, many countries around the world, as well as Korea, have faced serious social problems due to increased traffic congestion resulting in the social loss. As a result, there is an increasing demand for new transportation which is not exist. This is why many companies around the world are trying to solve this problem with transportation innovation through On Demand Mobility(ODM) which uses Personal Air Vehicle(PAV) that is operated on demand by customer rather than scheduled transportation. This study analyzed the current research trends of the On Demand Mobility projects of National Aeronautics and Space Administration (NASA), UBER, and AIRBUS. Also, this study presents the benefit of adopting this On Demand Mobility systems into Korea. Three commuting routes were set up in the metropolitan area in Korea, and the benefit of using the On Demand Mobility method was compared with the current public transportation and private car.

• Journal of the Korean association of regional geographers
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• v.19 no.4
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• pp.775-786
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• 2013

Although the Dept. of Geography in Korea has contributed to the social development of Korea with a remarkable growth for a short period, their social status and influence have not greatly improved and the graduates in Geography do not have many job opportunities. The low social statue and the limited job opportunities of the Dept. of Geography in Korea was due to the failure of the creation of their demand and the expansion of their sphere in response to the social changes and developments of Korea. In France, the Dept. of Geography has raised their social standings through the suited curriculum system to generate their demand and enlarge their domain with the social changes and development of French. The Dept. of Geography in Korea also needs not only the expansion of sphere but the building of the proper curriculum system for the creation of demand.

• Journal of Korean Society of Rural Planning
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• v.26 no.3
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• pp.49-56
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• 2020

The purpose of this study was to explore the relationship between types of self-care activities and demand of agro-healing services in adults with disabilities. Data were obtained from a survey of 160 adults with disabilities dwelling in Korea and SPSS 25.0 software was used for frequency, descriptive analysis, correlation analysis, and hierarchical multiple regression analysis. The main results applying the Behavioral Model for vulnerable populations were as follows: 1) among the different types of their self-care activities, the mean of passive perceptions score was 1.13(SD=0.81), the mean of physical behaviors score was 3.01(SD=1.04), the mean of social relationships score was 1.40(SD=1.42) and the mean of agro-healing services utilization per year was 4.30(SD=2.55), 2) passive perceptions and social relationships in their self-care activities positively affected demand of agro-healing services, 3) age, perceived physical health, perceived mental health, region of adults with disabilities were also significantly associated with demand of agro-healing services. Based on these results, practical and political implications for promoting self-care activities and agro-healing services in adults with disabilities were discussed.