• Title/Summary/Keyword: empirical research

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Numerical Study of the Heat Removal Performance for a Passive Containment Cooling System using MARS-KS with a New Empirical Correlation of Steam Condensation (새로운 응축열전달계수 상관식이 적용된 MARS-KS를 활용한 원자로건물 피동냉각계통 열제거 성능의 수치적 연구)

  • Jang, Yeong-Jun;Lee, Yeon-Gun;Kim, Sin;Lim, Sang-Gyu
    • Journal of Energy Engineering
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    • v.27 no.4
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    • pp.27-35
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    • 2018
  • The passive containment cooling system (PCCS) has been designed to remove the released decay heat during the accident by means of the condensation heat transfer phenomenon to guarantee the safety of the nuclear power plant. The heat removal performance of the PCCS is mainly governed by the condensation heat transfer of the steam-air mixture. In this study, the heat removal performance of the PCCS was evaluated by using the MARS-KS code with a new empirical correlation for steam condensation in the presence of a noncondensable gas. A new empirical correlation implemented into the MARS-KS code was developed as a function of parameters that affect the condensation heat transfer coefficient, such as the pressure, the wall subcooling, the noncondensable gas mass fraction and the aspect ratio of the condenser tube. The empirical correlation was applied to the MARS-KS code to replace the default Colburn-Hougen model. The various thermal-hydraulic parameters during the operation of the PCCS follonwing a large-break loss-of-coolant-accident were analyzed. The transient pressure behavior inside the containment from the MARS-KS with the empirical correlation was compared with calculated with the Colburn-Hougen model.

An Empirical Study on the Effect of Emotional Intelligence and Logic Intelligence on Organizational Citizenship Behavior - Moderating Effect of Emotional Labor - (감성지능과 논리지능이 조직시민행동에 미치는 영향 - 감정노동의 조절효과 -)

  • Jung, Hyun-Woo
    • Management & Information Systems Review
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    • v.30 no.3
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    • pp.107-132
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    • 2011
  • The purposes of this paper are to examine the effect of emotional intelligence and logic intelligence on organizational citizenship behavior and to examine the moderating effect of intelligence labor on these relationship. For these purposes, literature review and survey research were conducted. The 420 questionnaires were sent to the 12 manufactural firms in the Busan and Kyungsang Nam-Do region for empirical analysis. Total 363 usable responses were collected(effective response rate : 86.40%). The major findings of the empirical research are as follows ; First, emotional intelligence and logic intelligence have positive influence organizational citizenship behavior. but emotional intelligence have more positive influence than logic intelligence on organizational citizenship behavior. Second, emotional intelligence has differential influence on organizational citizenship behavior by emotional labor, but logic intelligence hasn't that. In conclusion, emotional intelligence is expected to improve organizational citizenship behavior which is extra-role behavior in an organization. Therefore, managers have to develop organizational citizenship behavior by exhibiting emotional intelligence, considering emotional labor.

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Empirical Research for Activating the Public Health on Regional Medical Center of Local Government (지방자치단체 지방의료원의 운영 활성화를 위한 실증적 연구)

  • Lee, Shin-Suk;Park, Sang-Moo;Sim, Moon-Bo
    • The Journal of the Korea Contents Association
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    • v.12 no.10
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    • pp.178-194
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    • 2012
  • Regional medical center, this country's public health researchers to activate discussion about public health nature of publicness and Regional medical center to identify actual conditions of the present analysis of previous studies based on the experience of researchers and policy factors, environmental factors, financial factors, and self-sustaining factors affecting the activation of the public health by assuming that the four provinces, Chungnam Regional Medical Center conducted the survey to target four factors through empirical analysis and 40 kinds of relationships with sub-variables hypothesis. To empirical analysis as a background element present hypotheses and research model setting, study population and method of analysis of the set, factor analysis and reliability, validity analysis conducted, and Windows 7 operating system SPSS 19.0 analysis tool for Regional Medical Center enable the public health was to investigate the relationship between factors and variables, PLS 2.0 as an analytical tool to test the hypothesis through the analysis of the model was used.

An Empirical Study on the Recognized Necessity by Vietnamese Users for the Motorcycle Inspection System (베트남 사용자가 인식하는 이륜차 검사제도 필요성에 관한 실증연구)

  • Lee, Yang-Ho;Ryu, Ki-Hyun;Son, Sung-Ho;Jung, Se-Hee
    • Journal of Auto-vehicle Safety Association
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    • v.10 no.2
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    • pp.43-49
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    • 2018
  • Southeast Asia is a strategic market for both technology and inspection system to enter simultaneously. At the core market is Vietnam which is know to have the fourth highest registration of motorcycles as of 2016. The Motorcycle Inspection System is a social regulation, furthermore, the impact of the system is delivered through indirect means such as minimization of social cost. Therefore, measurements on the perception of users on the needs for an inspection system serves as valuable data to simultaneously enter this markets. This research is an empirical study on the perception of Vietnamese users on the needs to adopt a motorcycle inspection system based on data collected through surveys and is aimed at conducting a preliminary investigation on consumer behavior in Vietnam. The empirical study conducted through surveys revealed that Vietnamese motorcycle users perceive the needs for an inspection system for maintenance, safe operations and selling used vehicles at a reasonable price. In addition, the study also verified that the safe operations factor has a moderating effect due to interaction between prevention of illegal vehicle and reduction of emission gases. This research results present implications in developing equipment adapted to the local area in order to enter into a strategic market. Moreover, it is expected that the findings will also serve as valuable data for bilateral cooperation between the two countries and the diffusion of technology.

Factor Analysis of the Motivation on Crowdfunding Participants : An Empirical Study of Funder Centered Reward-type Platform (Crowdfunding 활성화를 위한 투자자 동기요인 분석 : 후원형(Reward) 플랫폼의 투자자(Funder)를 중심으로)

  • Lee, Chae Rin;Lee, Jung Hoon;Shin, Dong Young
    • The Journal of Society for e-Business Studies
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    • v.20 no.1
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    • pp.137-151
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    • 2015
  • Crowdfunding is a novel method for funding from many individuals using web based platform often in return for products or equity. It allows individual entrepreneurs to create diverse products and services. This thesis elaborates a theoretical foundation for identifying the factors that must have motivated the funders in sponsoring crowdfunding projects. Based on the motivation theory, the proposed research model is constructed with intrinsic and extrinsic motivations from relevant literatures. We also examined how different crowdfunding modes ('Keeping It All' and 'All or Nothing') moderate the proposed research model. Based on the survey from various crowdfunding service providers in Korea, this empirical study found that continuous participation in crowdfunding is positively correlated with factors such as enjoyment, familiarity, agency credibility and reward, while peer-influence shows negative correlation. Furthermore, moderating effects of funding modes significantly affect continuous participation. These empirical results contribute insights on the emerging phenomenon of crowdfunding from funders' perspectives and shed lights more on the ways that the actions of platform providers may affect their ability to receive entrepreneurial financing.

Instructor's Smart Learning Acceptance : Focusing on TAM Model (교수자의 스마트학습 수용 : TAM 모형을 중심으로)

  • Kim, Do-Goan;Lee, Hyun-Chang;Rhee, Yang-Won;Shin, Seong-Yoon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.6
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    • pp.1081-1086
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    • 2016
  • While smart learning have been introduced for more learning effect, this study is to understand instructor's smart learning acceptance using technology acceptance model(TAM). This study developed the extended TAM model, including external pressure for smart learning and smart self efficacy for smart devices as study variables and attempted to examine the research model through the empirical analysis. The research model has the 7 variables including smart self-efficacy and external pressure. For the empirical study, the survey was conducted for the one month, March, 2016, and the total 143 data among the collected 167 responses were used for the empirical analysis. As the result of the analysis through the structural equation model, the 9 paths among the total 10 paths show the significant relationships between the variables. Through using the result of this study, it is to provide suggestions for the improvement of smart learning environments.

The Study on Essential Competencies for University Students in consideration of University Specialization and Major: Focusing on Hotel and Tourism Management (대학특성과 전공을 고려한 대학생 핵심역량에 관한 연구: 호텔관광경영전공을 중심으로)

  • Jung, Hae-Yong
    • Journal of Digital Convergence
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    • v.13 no.10
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    • pp.19-32
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    • 2015
  • This research was performed to provide a basic data for reforming University and Hotel & Tourism Management Curriculum Framework based on competency-based education, especially through identifying university students' competency categories of that reflect on the specialization and major of university. For the purpose of this research first, based on the literature review and empirical study, this paper grouped competencies into four areas: Generic Competencies, Specific Competencies, Personality Competencies, and University Specialization Competencies. Second, this paper examined empirical test through a survey of university students by Importance-Performance Analysis on four main categories. As a result of empirical test, four main categories were statistically verified, and the differences among majors about importance, performance and educational needs of each four competencies were analyzed significantly. There were proved that hospitality major is higher than other majors in importance of Generic and Personality Competency and performance of Generic Competency as well.

A Study on the Fashion Styling for Personal Image Making (퍼스널 이미지 메이킹을 위한 패션 연출에 관한 연구)

  • Choi, Young-Sun;Choy, Hyon-Sook
    • Fashion & Textile Research Journal
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    • v.9 no.1
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    • pp.49-54
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    • 2007
  • In the 21th century, the age of image, people express and evaluate with images. Image is a symbol of a person or a thing. It simulates people's visual sense most quickly and precisely and is shared in the society. At the time, since it is acknowledged that there are few books available and lack of theoretical system with regard to image making, the purpose of this study was to get a theoretical access to image making by taking as an empirical case the case of Choi Byeongryeol, a candidate running for the congress in June 4, 1998 and combining it with theories of costume. Research methods employed here were to investigate the theoretical system of image making and fashion direction, and to analyze empirical cases. The boundary of the empirical case was limited to the candidate's fashion direction during the election period for 50 days from April 1998 to the election date June 4, 1998. The results of this study are as follows. First, personal image making aims at the establishment of one's own identity through building up an ideal image. Second, it is found that personal image making can make a complete image possible through fashion direction. Third, it is found that fashion direction functions as a symbol and communicative means with a result that the effect can penetrate to the society accurately and quickly. Fourth, it is found that fashion direction fit for a situation can enhance personal values and reinforce his or her competitive power to carry out the ultimate goals in the society. This study proved that fashion styling for personal image making expresses a person in a symbolic image, enhances his/her personal value in the society and, ultimately, contributes to the establishment of an individual's identity.

Causes Attributable to Achieving Consumers' Personal Goals in Advance, Deservingness and Indulgent Consumption (소비자의 사전 목적달성에 귀인되는 원인과 자기보상자격 그리고 탐닉소비)

  • Choi, Nak-Hwan
    • Journal of Distribution Science
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    • v.15 no.4
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    • pp.79-89
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    • 2017
  • Purpose - Previous studies have not paid attention to pride type and effort type when consumers feel pride. In the present paper, the pride was divided into the two types such as hubristic pride and authentic pride. The causes attributed to achieve the goals when consumers achieved their personal goals, which could induce their pride were divided into trait, special effort, and universal effort, gratitude. This research attempted to investigate the mediation role of self-reward deservingness in finding the differences of inclination to indulgent consumption among the traits or special effort, the universal effort, and other's help. Research design, data, and methodology - In the empirical study, 'general flour food restaurants, Kimbabchunkuk, Edya, etc.' and 'VIPS, Outback, Starbucks, etc.' were taken as the two groups of subjects as empirical brand goods since they presented good contrast with each other. The single-factor design between subjects was adopted in this study by classifying the causes attributable to achieving the pre-goals of consumers into 4 categories: one attributable to trait; one attributable to special effort; one attributable to universal effort; one attributable to other's help. Results - The outcomes from the empirical analysis are as followings. First, the consumers who attributed to trait or special effort for achieving their personal goals in advance turned out to show stronger inclination toward direct indulgent consumption than those who attributed to universal effort or other's help for achieving the goals, without regard to self-reward deservingness. Second, those consumers who attributed to special effort for achieving their personal goals in advance revealed stronger inclination toward indulgent consumption with mediation of self-reward deservingness than those who attributed to trait or universal effort. And those who attributed to special effort or trait for achieving the goals revealed stronger inclination toward the consumption with the mediation of the deservingness than those who attributed to other's help. Conclusions - The present study is contributing to the progress of theories concerning hubris pride, authentic pride, and indulgent consumption. Marketing managers should endeavor to find pride type consumers felt according the causes attributed to for achieving important goals in advance, and make an efforts to develop messages that could appeal to the pride type.

Work-Family Conflict and Employees' Performance (일-가정생활의 갈등이 조직구성원의 성과에 미치는 영향)

  • Tumenkhuu, Selenge;Lee, Jeong Eon
    • The Journal of the Korea Contents Association
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    • v.15 no.3
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    • pp.362-369
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    • 2015
  • This empirical research mainly investigates the relationship between work-family conflict and organizational performance. Three key variables apply for the empirical research; work-family conflict, organizational performance, and family-friendly HR practices. A total of 230 questionnaires is collected from mid-sized companies for hypothesis testing. The empirical analysis shows that work-life balance has a great importance on workers' job satisfaction and intention to leave. The family-friendly HR practices play a moderating role between work-family conflict and organizational performance. The findings support the fact that achieving work-life balance enhances organizational performance and using family-friendly HR practices is an ideal for balancing between work- and family life.