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선경철(Kyung-Chul Sun),박세준(Se-Joon Park),최정식(Jeong-Sik Choi),차인수(In-Su Cha) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.4
본 논문에서는 유량변화에 따른 200W급 PEMFC 운전특성을 연구하였다. 연료공급은 수소탱크와 공기공급용 컴프레셔를 이용하였고 유량은 MFC를 이용하여 제어하였다. 연료의 가습은 Bubbling type을 사용하였고 유량변화에 대한 반응차이를 크게 보기 위해 Back pressure 레귤레이터를 제거함으로써 확연한 차이를 얻을 수 있었다.
[001] 및 [011] 방향 분극의 압전 단결정 PMN-PZT 를 이용한 진동 에너지 수확 특성
선경호(Kyung Ho Sun),김영철(Young-Cheol Kim),김재은(Jae Eun Kim) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
This work investigated the electromechanical performance of a cantilevered vibration energy harvester incorporating the single crystal PMN-PZT, manufactured with the most recent technology of solid-state single crystal growth. Single crystal PMN-PZTs with two different crystallographic axes such as [011] and [001] were considered. For the [011] orientation, because material properties such as the stiffness, piezoelectric strain coefficients are not the same in the directions normal to the crystallographic axis, the effects of the transversely anisotropy on the magnitude and frequency bandwidth of output power were also analyzed.
선경철(Sun Kyung-Chul),차인수(Cha In-Su) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
Building-integrated photovoltaics(BIPV) are increasingly incorporate into new domestic and industrial buildings as a proncipal or ancillary source of electrical power, and are one of the fastest growing segments of the photovoltaic industry. This paper presents operational features analysis and PCS(Power Conversion System) factors of grid-connected 30kW BIPV on library of Dongshin University. The data consisted of insolation, Temperature, solar-cell performance and inverter performance are collected by IVIsion web monitoring system and analyzed. The analyzed data gave this paper effect elements of optimal operation.
외식 프랜차이즈 기업의 초기 가맹 비용 결정 전략이 가맹본부 수익성에 미치는 영향
선경아(Kyung-A Sun) 한국조리학회 2023 한국조리학회지 Vol.29 No.12
This study investigates the relationship between pricing strategies for initial fee decisions and franchisors’ profitability. As the restaurant industry is getting excessively competitive, it has been more difficult for the firms to make profits. In this market condition, franchising has become a useful governance structure for restaurant firms by enabling them to grow rapidly and improve financial performance. The current study aims to uncover the mechanism how initial fee decisions affect franchisors’ profitability, using the framework of pricing strategies. Panel data analyses by employing the secondary data show the results that (1) cost-based pricing strategy on initial fee decisions was not statistically significant, (2) competition-based strategy on initial fee decisions has a negative effect on profitability, (3) value-based strategy on initial fee decisions has a positive effect on profitability. Findings of the study provide implications to franchising and restaurant management literature as well as industry practitioners.
수퍼바이저와의 협동관계가 사회복지사(수퍼바이지)의 업무만족 및 소진에 미치는 영향
강선경(Kang Sun Kyung) 한국사회복지학회 2008 한국사회복지학 Vol.60 No.2
본 연구의 목적은 협동작업(Work Alliance)으로 개념화된 바와 같이, 사회복지 종사자의 업무만족(Working Satisfaction)과 소진(Burnout)에 관한 수퍼바이저와 수퍼바이지간의 협동관계(Corporative Relationship)의 효과를 탐구하는 데 있다. 이를 위해 서울과 경기지역에 위치한 종합 사회복지관 및 상담 센터를 중심으로 68명의 수퍼바이저와 80명의 수퍼바이지들을 대상으로 일련의 위계적 선형모형(Hierarchical Linear Model: HLM)을 이용하여 독립변수(수퍼바이저와 수퍼바이지간의 협동관계)가 종속변수(업무만족 및 소진)에 미치는 영향을 조사하였다. 연구결과, 수퍼바이지가 수퍼바이저에게 가진 친밀한 느낌이 그들의 업무만족과 관계가 있다고 나타났다. 그러나, 수퍼바이저와 수퍼바이지 간의 협동이 당연히 소진 정도를 낮추는 것과 연관되어서는 통계적인 유의미를 발견할 수 없었다. 또한 업무만족과 소진 간에는 반비례적인 부의 관계가 있음이 나타났다. 마지막으로 본 연구의 의의와 후속연구에 대한 시사점을 덧붙였다. The purpose of this study explored the effects of supervisory relationship, conceptualized as working alliance, on social workers' working satisfaction and burnout. The consented participants were 68 supervisors and 80 supervisees working at Social Service Centers located in Seoul and Kyung-ki Province. Hierarchical linear model analyses of survey results from supervisors (n=68) and workers (n=80) revealed that the workers' sense of rapport within the supervisory relationship is related to working satisfaction. While it was expected that the supervisory relationship would also relate to levels of burnout, no association was found in the analyses. However, strong negative correlations were found between the supervisees' feelings of rapport within the supervisory relationship and both emotional exhaustion and depersonalization. The implication of future research and of social work practice and policy were added.