• Transactions of the Korean Society of Mechanical Engineers B
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• v.21 no.3
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• pp.371-379
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• 1997

A theoretical study for a forced uniform flow impinging on a rotating disk, typically involved in Chemical Vapor Deposition(CVD) and Vapor-phase Axial Deposition(VAD) processes, has been carried out. A set of exact solutions for flow and temperature fields are developed by employing a similarity variable obtained from force balance on a control volume near the disk. The solutions depend on the rotating speed of the disk, .omega., and the forced flow speed toward the disk, a. For constant forced flow speed, the overall boundary layer thickness decreases when the rotating speed increases. Approximately 5%, 15%, and 30% decreases of the thickness are obtained for .omega./a = 2, 5, and 10, respectively, compared to the case of .omega./a = 0 (axisymmetric stagnation point flow). For constant rotating disk speed the boundary layer thickness immediately decreases as the forced flow speed increases, compared to the case of .omega./a .rarw. .inf. (induced flow near a rotating disk). Effects of .omega. and a on heat transfer coefficient are studied and explained with the boundary layer characteristics.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.2 no.2
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• pp.1-13
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• 1984

Projection has been used in order to indicate the horizontal position of triangulation stations which had been existed on the earth surface. In our country, the plane Rectangular coordinate of the triangulation station is computed by means of Gauss Double projection. But it proves to contain many errors according to the difference in Latitude and longitude. Therefore, in this study Transverse Mercator projection which is known to contain less error than Gauss Double projection in an applied region is introduced, and the results obtain by two these projections and the value today in our country are compared and analysed. when an another plane Rectangular Coordinate system is added to the present 3-plane Rectangular Coordinate system, there is an object inshowing the best position.

• The Journal of the Korea Contents Association
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• v.16 no.7
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• pp.319-336
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• 2016

This study is aimed at suggesting the implications about the importance of authentic leadership through the analysis of what influence of supervisor's authentic leadership has on job performance for employees. Especially, this study investigates whether employee's organizational commitment, organizational citizenship behavior mediates the relationship between authentic leadership and job performance. Survey was carried out among employees in a variety of organizations. Total 440 sheets of sample have been derived and analysed by SPSS/WIN 24.0 and Stata 14.0. The result revealed that supervisor's authentic leadership was positively related to organizational commitment, organizational citizenship behavior, and job performance for employees. Further, organizational commitment, organizational citizenship behavior mediated the effects of authentic leadership on employee's job performance. The salient point was that in order to improve employee's job performance is to improve the employee's voluntary participation and cooperation behavior through the supervisor's authentic leadership.

• The Journal of the Korea Contents Association
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• v.15 no.5
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• pp.507-514
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• 2015

There is an increasing awareness about the abusive supervision(AS) and organizational silence(OS) in organizations and literature about the relation between organizational commitment(OC). But there is a shortage of studies about the abusive supervision and organizational silence in travel service. The purpose of this study is to research reasons of abuse supervision in organizations, its effects, results and applications which can minimize or remove abusive supervision by discussion. In this sense, Questionnaires were delivered 9 travel agencies in Seoul and 241 of them were taken. Questionnaire data was analyzed, and according to the results, some implications were proposed. Abusive supervision affects on organizational silence and organizational commitment of employee in travel agent. Organizational silence ha positive effects on organizational commitment. Organizational silence plays as a role of mediator variable in proposal research model. It is hoped that the present research will encourage future multi-level theoretical and empirical work on abusive supervision.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.1
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• pp.521-529
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• 2020

This paper attempted to empirically analyze whether or not ethical behavior at the individual level has a positive effect on both companies and employees. In addition, based on the social exchange theory, a hypothesis was established that perceived supervisory support has a positive moderating effect on the relationship between ethical behavior, job satisfaction, and job performance. As a result of analyzing a questionnaire given to 238 sales employees, It was first verified that ethical behavior by sales staff had a positive effect on job satisfaction and performance, as expected in the hypothesis. Second, the moderating effect of perceived supervisory support was significant only in the relationship between the ethical behavior of the salesperson and job performance. On the other hand, the moderating effect of perceived supervisory support on the relationship between ethical behavior and job satisfaction was not verified. Based on the results of this study, the implications and future directions of study are presented.

• The Journal of the Korea Contents Association
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• v.19 no.7
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• pp.518-525
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• 2019

The purpose of this study is to examine the moderating effect of conflict in the relationship between neuroticism and abusive supervision. In previous studies, neuroticism was considered to be an important predictor of abusive supervision. According to the research results, supervisors with high neuroticism are more likely to be abusive supervision. However, in some studies, there was no significant relationship between neuroticism and abusive supervision. Therefore, this study considered conflict as a environmental factor in the relationship between neuroticism and abusive supervision based on the Trait Activation Theory. The higher the level of conflict, the more likely it would be that there would be a positive relationship between neuroticism and abusive supervision, and a lower level of conflict would not have a significant relationship between neuroticism and abusive supervision. Therefore, this study hypothesized the moderating effects of conflict in the relationship between neuroticism and abusive supervision. In order to test this hypothesis, this study conducted a questionnaire survey on the employees who work in South Korea. The implications and limitations of the study and the direction of future research are presented in the conclusion.

• The Journal of the Korea Contents Association
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• v.22 no.6
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• pp.701-711
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• 2022

This study tried to examine the relationship between superior leadership and emotional support from co-workers on task performance through performance evaluation fairness and self-efficacy in order to find factors that affect the task performance of a company in an uncertain market environment. For this purpose, 500 copies of questionnaire data were collected from corporate employees, and the research hypothesis was verified using Smart PLS 3.0. As a result of the study, superior leadership and emotional support from co-workers showed a positive (+) effect individually on the fairness of employee performance evaluation, Performance evaluation fairness showed a positive (+) effect on self-efficacy. Through this study, it was found that the fairness and self-efficacy of the performance evaluation accepted by employees affects work performance, providing a theoretical foundation for subsequent researchers. Practical implications are suggested to inspire employees to take on a challenge by managing them properly. In future research, based on the results of this study, various studies are needed on the factors that an organization must have for task performance.

• Journal of Korea Society of Industrial Information Systems
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• v.15 no.4
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• pp.71-81
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• 2010

The purpose of this study is to examine the moderating effects of the Leader-member exchange(LMX) on relationship between the interpersonal conflict and turnover intention. Since effective management of IS personnel is important issue for the IS related researchers and practitioners since their turnover rate has been known to be high and skilled personnel have been in short supply. We develop the hypotheses from the prior studies and empirically testing them in the context of IS personnels from various companies located in vicinity of capital city of Korea. This empirical study show interesting results. Good leader-member exchange has the moderating effect on the management of interpersonal conflict level and drastic reduction of the turnover behavior. Based on the analyzed results, we discussed the theoretical implications and limitations.

• Korean Journal of Culture and Social Issue
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• v.23 no.2
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• pp.97-129
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• 2017

The purpose of this study was to investigate the influence of techno-overload and techno-invasion on work-family conflict and the mediating role of psychological detachment from work to techno-overload and techno-invasion. In addition, this study examined the moderating role of leader-member exchange in the relationship between techno-overload, techno-invasion and psychological detachment from work. The results from 306 participants provided evidence that (1) techono-invasion was negatively related to psychological detachment from work, (2) psychological detachment from work was negatively related to work-family conflict, (3) psychological detachment from work partially mediated the relationship between techno-invasion and work-family conflict (4) leader-member exchange moderated the relationship between techno-invasion and psychological detachment from work. Based on the results, implications of these findings, limitations, and future research were dicussed in general discussion.

• Journal of the korean Society of Automotive Engineers
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• v.10 no.6
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• pp.39-47
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• 1988

A disk photo sensor system was constructed and installed on engine for the crank angle measurement. Statically measured TDC crank angle data were compared with those obtained from engine motoring. Two groups of cylinder pressure data were compared each other, one measured by pressure transducer mounted flush on the combustion chamber and the other obtained with the help of spark plug type adaptor. A simple analysis on the gas flow in the spark plug type pressure transducer displayed reasonably good agreement with those from engine motoring tests. In various firing tests, the IMERs obtained from the spark plug type pressure transducer turned out to be higher than those from the flush mounted one at low engine speed while those two were nearly the same at high engine speed. As the engine load decreased the relative difference in IMEP measurement between the two types tended to be enlarged.