• 유통과학연구
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• 제16권11호
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• pp.47-56
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• 2018

Purpose - In this research, the expectation level of service of Incheon International Airport was investigated. Service expectation level is critical to the customers' satisfaction and should be managed. Regarding the expectation level of service, the concepts have been defined and introduced by some researchers including Zeithaml, Berry, and Parasuraman (1993). However, due to the difficulties of measuring the level, researches on the expectation level of service have been limited. The main reason of difficulties of measuring the effects is that desired service, adequate service, perceived service, predicted service which are the conceptual components of the expectation level of service are psychologically described concepts and thus are hard to set up standards and to measure numerically. All that one can discern is that desired service level is higher than adequate service level or perceived service level is lower than predicted service level under the certain conditions, etc. Research design, data, and methodology - In this research, the level of service and factors affecting the level are investigated using the case of an Airport. The main idea of research is to investigate whether a supposed factor that is alleged to affect the expected service level is working empirically. The supposed factor is service provider's promise to provide certain level of service to customers. Results - The research results can be summarized as follow. First, service provider's promise, in this case the Airport's Service Quality Award by Airports Council International which can be regarded as objective promise to provide the certain level of service to customers is turned out to be influential to factors affecting expectation level of service. Second, service provider's promise affects to move the customers' expectation level of service upward especially the service of delivering the necessary information to customers in the airport correctly and swiftly. Conclusions - The implications of the research results are, first, customers' expectation level of service in influenced by service provider's promise, second, airport's service award increases the level of customers' service level and as a result for the airport to meet the customers' expectation level of service more efforts should be made.

• 대한전기학회논문지:전력기술부문A
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• 제53권10호
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• pp.550-555
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• 2004

Fault section isolation and service restoration are very important for function of DAS. In Japan, a progressive protection method is used for the line to ground fault section isolation and service restoration. But the progressive protection method has a drawback that the customer will experience outage time and that the rate in use of the feeder is not over 50%. This paper presents a new Service Restoration Algorithm which is for the line to ground fault section isolation and service restoration method for a ungrounded distribution system. If the proposed algorithm is used, the rate in use of the feeder can improve than before because a distribution system can change multi connection of feeder and the customer's outage time can be reduced. The proposed algorithm has been successfully tested in a distribution system.

• 대한전기학회논문지:전력기술부문A
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• 제51권7호
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• pp.333-340
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• 2002

To secure a service continuity is one of the most important mission in the ower distribution system operation. In this paper the necessary and sufficient condition to guarantee 100% service restoration capability for any fault on the system is reported. An evaluation methodology of the restoration capability(or restorability) is developed based on the developed restoration conditions. Applications of the developed concept to the system operation in the normal and emergency states, that would enhance the supply reliability of the system are described. They include enhancement of restoration capability adapting to load change, identification of best open switch and supervised switch positions.

• 대한전기학회논문지:전력기술부문A
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• 제52권9호
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• pp.513-520
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• 2003

Service restoration is an emergency control in distribution constrol centers to restore out-of-service area as soon as possible when a fault occurs in distribution networks. therefore, it requires fast computation time and high quality solutions for load balancing. In this paper. a load balance index and heuristic guided best-first search are proposed for these problem. The proposed algorithm consists of two parts. One is to set up a decision tree to represent the various switching operations available. Another is to identify the most effective the set of switches using proposed search technique and a load balance index. Test results on the KEPCO's 108 bus distribution system show that the performance is efficient and robust.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (A)
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• pp.395-398
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• 2006

임베디드 시스템의 발달로 인해 기존의 컴퓨팅 패러다임(Paradigm)이 모바일이나 웨어러블 컴퓨팅 등 임베디드 환경으로 급격하게 변화하고 있다. 이렇게 컴퓨팅 패러다임이 변화해도 정보 서비스에 대한 기술이 여전히 필요하다. 네트웍 환경에서 많이 사용하고 있는 정보 서비스 기술중의 하나인 Data Distribution Service(DDS)는 간단한 통신 메커니즘을 기반으로 하면서도 높은 성능으로 정보 서비스를 제공할 수 있다. 따라서, 본 논문에서는 실시간 운영체제를 사용하는 내장형 시스템에 Data Distribution Service(DDS)를 적용하여 데이터의 수집과 전송을 효율적으로 사용하게 하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.381-383
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• 2004

This paper presents for service restoration Abstract -in electric power distribution systems. The aim of the service restoration is an emergency control in distribution system to restore out-of service areas as soon as possible when a fault occurs in distribution system. For this reason, this paper presents a new service restoration strategy for multi-outage areas. Proposed algorithm consists of two methods. One is individual restoration scheme, the other one is integrated restoration scheme. The former determines restoration order of outage areas based on restoration index. If the former method can not generate a feasible restoration plan, the latter would try to find new configuration without overloaded section through tie exchange method.

• 유통과학연구
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• 제20권3호
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• pp.45-52
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• 2022

Purpose: This study investigated the impact of staff verbal and non-verbal communication on consumer satisfaction and revisit intention. The study sought to identify differences in demographic and eating out characteristics on perceived verbal and non-verbal communication. Research design and methodology: This study used a survey method to collect data. The questionnaire asked about previous experience with verbal and non-verbal communication with staff at a counter service restaurant. The study measured degrees of perceived verbal and non-verbal communication. In addition, the effect of verbal and non-verbal communication on satisfaction and revisit intention was measured. The principal results: Results of ANOVA showed significant differences in monthly income on verbal communication and monthly income and budget for dining out on verbal and non-verbal communication. Both verbal and non-verbal communication affected satisfaction and revisit intention significantly with slightly more power of verbal communication than non-verbal communication. Major conclusions: Results of this study suggest that consumers are affected by both verbal and non-verbal communication. Staff communication is critical to increasing consumer satisfaction and revisit intention; hence, training staff in effective communication is necessary.

• 유통과학연구
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• 제21권7호
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• pp.117-129
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• 2023

Purpose: With the number of COVID-19 cases declining and generational differences among how people use mobile apps, including health service apps, the goal of this research is to identify and analyze the factors that affect people's attitudes when using the Halodoc health service app during the third year of the pandemic. Research design, data, and methodology: This study proposes a quantitative analysis method based on PLS-SEM modeling. This study has used a questionnaire survey to collect randomized data from 268 Halodoc users from generations Y and Z in Jakarta. Results: Both the Y and Z generations believe there is a significant usefulness factor in the attitude toward using the application. The start of the pandemic period demonstrates that the urgency of using health service applications is no longer determined by performance expectations, effort, or social panic, but rather by these applications' usability. Conclusions: Even though a health service application is no longer considered an urgent service or a priority need, attitudes, and behaviors in using it emphasize the aspect of long-term benefits. These findings supplement other considerations and understandings in application of the Unified Theory of Acceptance and Use of Technology (UTAUT) model in explaining attitudes and intention behaviors.

• 유통과학연구
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• 제12권8호
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• pp.91-102
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• 2014

Purpose - Today, the importance of the service industry has increased. Social welfare businesses that follow the non-profit principle have neglected the distribution of the service. However, an intangible service, when produced and consumed, has a similar service delivery system to common service distribution and social welfare. Therefore, the author has assumed the efficiency of the service delivery system of social welfare to be equivalent to the service distribution industry. Hence, various kinds of social welfare services for the prevention of elderly suicide, from the perspective of distribution, are discussed. Studies on generational relations have thus far investigated depression from parent-children conflict, and satisfaction with their lives. Studies on the relationship between family solidarity and elderly suicide by analyzing existing social problems are rare. This study investigated the effects of family solidarity between old parents and adult children upon elderly suicide by analyzing serious psychological and social problems. This study revealed basic measures for elderly suicide prevention through services that could elevate family solidarity from the perspective of social welfare service distribution. Research design, data, and methodology - The subjects were 468 elderly, 65 years or older, at 18 senior welfare centers and halls for the elderly at Seoul and Gyeonggi-do. Questionnaire surveys, excluding invalid answers, were analyzed. Convenience sampling was used from February 5, 2014 to March 5, 2014. The findings were: First, women and those having spouses with advanced educational backgrounds and social activities had primary solidarity such as contact solidarity, affectionate solidarity, functional solidarity (giving help), and functional solidarity (receiving help). In addition, those who had good health, from a subjective point of view, had more solidarity. Second, the elderly who were men and single, and who had poorer educational backgrounds thought of suicide, lacked social activities, and had poor health, from a subjective point of view. Third, family solidarity between old parents and adult children had significantly negative influence on the suicidal ideation of the elderly. Results - The study revealed the following implications. First, the preparation for old age should consider not only economic welfare but also the psychological welfare due to the relationship with children. Second, the phenomenon of elderly suicide because of a lack of family solidarity could increase national loss and have great influence upon welfare in old age. Therefore, planning of welfare services for the elderly should consider the value of relationships with children to improve the psychological welfare of the elderly. Third, the social expenses of government-oriented support for parents should be discussed from the people's point of view. Conclusions - The subjects of the study comprised the elderly at Seoul and Gyenggi-do; therefore, it would be difficult to extrapolate the findings to all the elderly in the nation. The subject visited senior welfare centers as well as halls for the elderly; therefore, it would be difficult to assume that the trends were representative of the elderly in the nation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 A
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• pp.537-540
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• 2000

The Distribution System consist of many tie-line switches and sectionalizing switches, operated a radial type. When an outage occurs in Distribution System, outage areas are isolated by system switches, has to restored as soon as possible. At this time, system operator have to get a information about network topology for service restoration of outage areas. Therefore, the searching result of restorative topology has to fast computation time and reliable result topology for to restore a electric service to outage areas, equal to optimal switching operation problem. So, the problem can be defined as combinatorial optimization problem. The service restoration problem is so important problem which have outage area minimization, outage loss minimization. Many researcher is applying to the service restoration problem with various techniques. In this paper, advanced Dijkstra algorithm is applied to searching a restoration topology, is so efficient to searching a shortest path in graph type network. Additionally, fuzzy rules and operator are applied to overcome a fuzziness of correlation with input data. The present technique has superior results which are fast computation time and searching results than previous researches, demonstrated by example distribution model system which has 3 feeders, 26 buses. For a application capability to real distribution system, additionally demonstrated by real distribution system of KEPCO(Korea Electric Power Corporation) which has 8 feeders and 140 buses.