• Journal of Korean Society for Quality Management
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• v.44 no.4
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• pp.983-997
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• 2016

Purpose: The purpose of this paper is to examine the structural relationship among leader-member exchange(LMX), empowerment, job satisfaction, organizational commitment, and customer orientation in a low-cost carrier industry. Methods: The collected data through the survey were analyzed using structure equation model analysis The sample used for the empirical analysis is a total of 231 questionnaires. Results: The results of empirical analysis are summarized as follows. First, LMX in a low-cost airline has a significant effect on empowerment, job satisfaction, and customer orientation Second, empowerment has a significant impact on organizational commitment and job satisfaction. However, it is not significantly related to customer orientation. Third, Organization Commitment has significant effect on jon satisfaction. Finally, job satisfaction has a significant impact on customer orientation. Conclusion: This paper has a contribution in that it extends the range of the academic research concerning LMX. Also this paper provides implications on effective human resource management method suitable for a Jeju-Air.

• Journal of Korea Society of Digital Industry and Information Management
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• v.10 no.2
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• pp.75-82
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• 2014

MANET has various types of attacks. In particular, routing attacks using characteristics of movement of nodes and wireless communication is the most threatening because all nodes which configure network perform a function of router which forwards packets. Therefore, mechanisms that detect routing attacks and defense must be applied. In this paper, we proposed hierarchical structure attack detection techniques in order to improve the detection ability against routing attacks. Black hole detection is performed using PIT for monitoring about control packets within cluster and packet information management on the cluster head. Flooding attack prevention is performed using cooperation-based distributed detection technique by member nodes. For this, member node uses NTT for information management of neighbor nodes and threshold whether attack or not receives from cluster head. The performance of attack detection could be further improved by calculating at regular intervals threshold considering the total traffic within cluster in the cluster head.

• Journal of Korea Society of Digital Industry and Information Management
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• v.13 no.4
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• pp.115-123
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• 2017

The mutual cooperation among nodes is very important because mobile nodes participating in MANET communicate with limited resources and wireless environment. This characteristic is important especially in environment that supports group communication. In order to support the secure multicast environment, it is important enough to affect performance to provide accurate authentication method for multicast group members and increase the integrity of transmitted data. Therefore, we propose a technique to provide the multicast secure communication by providing efficient authentication and group key management for multicast member nodes in this paper. The cluster structure is used for authentication of nodes in the proposed technique. In order to efficient authentication of nodes, the reliability is measured using a combination of local trust information and global trust information measured by neighboring nodes. And issuing process of the group key has two steps. The issued security group key increases the integrity of the transmitted data. The superiority of the proposed technique was confirmed by comparative experiments.

• Korea Journal of Hospital Management
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• v.19 no.3
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• pp.1-10
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• 2014

The purpose of this study was to present base data for an efficient management of medical expenses at the hospital management by doing grasp of status of medical expenses from seamen's insurance by voluntary agreements. A Object of study is analyzing the data of medical expenses occurred from the total number of 2,699(inpatients 507, outpatients 2,192)cases who were covered by seamen's insurance at a general hospital which is located in Pusan Metropolitan City during 48 months from January 1, 2009 to Dec 31, 2012. The main results of this study are as follows: accrual medical expenses are the ship management companies member of P&I insurance is the most highest but share of receivables are the Korean ocean-going companies member of P&I insurance is the most highest, therefore, Korean ocean-going companies focus strictly than the payments from accounts receivable management should be considered to reduce the occurrence and concerning the turn around period of medical receivables are 4 months to 6 months during a research period. Therefore, it will be needed for managers of hospitals to prepare differentiated management based on the characteristics of each in insurer and to have recovery strategies of uncollected medical expenses.

• Korea Journal of Hospital Management
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• v.23 no.2
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• pp.1-17
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• 2018

Purposes: Based on samples of government officials who are working at public health centers, following research examines the Effect of Organizational Justice on the relationships between Followership and Organizational Citizenship Behavior and analyzes the moderating effect of Leader-Member Exchange. Methodology: For the methods, Sphericity verification, Exploratory factor analysis, Correlation analysis, Causal relation, Mediating effect of followership and Moderating Effect of The Leader-Member Exchange have been analyzed with SPSS 22.0 & AMOS 22.0 Ver. Findings: As a result of Correlation analysis, Predictive validity and Construct validity have meaningful effect. Also, In case of Path analysis, distributive justice and interactional justice have meaningful effect but procedural justice has no such effect on Followership. As a result of Mediated effect of followership analysis, distributive and interactional justice have positive impact on (Organizational and Interpersonal). As to the mediation effect of followership analysis, It is shown that distributive and Followership have meaningful effect on In-group, not Out-group. Lastly, It is shown that procedural justice and Followership have no meaningful effect on both In-group and Out-group. Practical Implications: For the implications, distributive justice and interactional justice have positive impact on Followership, while procedural justice has no such impact on Followership. Also, It also possibly has same result to the moderating effect of Leader-Member Exchange. Consequently, It is recognized that a fair process without a fair result cannot be valued. also, We can know that reward for procedural justice is evaluated to kind of negative.

• Journal of the Korean Society of Safety
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• v.30 no.6
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• pp.1-6
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• 2015

The actual condition is that environmental pollution due to the development of various industries has recently become a serious issue. An interest in improving the gas mileage is rising due to an increase in the number of vehicles in the era of high oil price in particular. In order to solve this problem, priority should be given to light-weight design of car body, However, at present, a design method enabling the conventional steel plate to be replaced is direly needed in order to guarantee passengers' safety according to excessive light-weight design of car body. In this study, in order to apply a design method that could realize fuel savings and environmental pollution prevention through an improvement in gas mileage together with meeting the safety requirements for vehicles, it was supposed that CFRP/Al composites member would be used as primary structural member. And to this end, it was intended to obtain optimum design data by experimentally implementing external impulsive load applied to the car body. According to results of impact test of CFRP/Al composites member, a collapsed shape of folding, crack, and bending occurred. So, it was possible to find that energy was observed. And in case of specimen having an angle of $90^{\circ}$ in the outermost layer and stack sequence of $[90^{\circ}{_2}/0^{\circ}2]s$, its collapsed length was shown to be short. Therefore, it was possible to find that the absorbed energy was shown to be higher by 20% or above at the maximum.

• Korean Journal of Construction Engineering and Management
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• v.16 no.3
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• pp.143-151
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• 2015

The Crack, occurred in the concrete structure, is a major cause of function deterioration such as strength, durability and waterproof. Therefore the need for crack reduction will continue as long as there is concrete structure. But, it is not easy to reduce or prevent crack cause of impact factor of it. There are so many factors of crack such as material, construction and maintenance environment, and structure, and these are acting in combination. So, this study derives a correlation between the cracks and members through reviewing member crack occurred. And member's attribute, related crack, is analyzed by it. It consider that the basic attribute of member is similar when its requirements are similar. Through this study, therefore, foundation of countermeasure of crack will be provided by prediction of crack shape through member's attribute.

• Management & Information Systems Review
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• v.31 no.4
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• pp.339-362
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• 2012

The purpose of this study is to examine the relationship between LMX, psychological empowerment and organizational commitment and the moderating effect of perceived organizational support. The research was examined using a sample of 305 employees engaged in various industries in Seoul, Gyeonggi and Gangwon provinces and the findings of these studies were as follows: To begin with, findings from the study indicate that the Leader-Member Exchange(LMX) is positively related to organizational commitment. Secondly, the Leader-Member Exchange(LMX) has been proven influential for psychological empowerment and furthermore, the results reveal that psychological empowerment(e.g. self-determination, meaning) has positive impacts on organizational commitment. Finally, it has been identified that the relationship between leader-member exchange and organizational commitment didn't prove to be moderated by perceived organizational support. The contribution and limitation of this research were discussed, and future researches were mentioned.

• Knowledge Management Research
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• v.18 no.4
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• pp.119-136
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• 2017

This paper focuses on proactive personality as one of the main personality traits relevant to knowledge sharing and examines how this personal trait influences knowledge sharing behavior. Moreover, in order to consider the interactive effect between proactive personality and a contextual factor, this study utilized the construct of LMXSC which can reveal restoration of resource losses due to knowledge sharing. Because LMXSC can have opposite directions depending on used theories, this study investigates how LMXSC moderates the relationship between proactive personality and knowledge sharing behavior by using conservation of resources theory and trait activation theory. This study tests hypotheses with the data of supervisor-employee dyads in various industries. An empirical results showed that proactive personality increased knowledge sharing behavior and LMXSC strengthened the positive relationship between proactive personality and knowledge sharing behavior as conservation of resources theory predicts. Based on these theoretical arguments and empirical findings, this study suggests theoretical and practical implications, limitations, and the directions of future research.

• Korean Journal of Social Welfare
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• v.46
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• pp.404-426
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• 2001

The purposes of study were to analyze the characteristics of case management network for the homebound elderly in Puchon and to identify major factors that affect the number of network member. The population of this study was social workers who provide services to the elderly. The results show that license of social work and information closeness have a significant effect on the number of network member among the independent variables. This finding is important for case management in the network. As observed in relationship characteristics, the community welfare center established by the university and city government roles in promoting service coordination.