• Journal of Korea Multimedia Society
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• v.12 no.5
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• pp.717-727
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• 2009

P2P (Peer-to-Peer) network depends on cooperation of peers considerably. However, some peers do not share files at all and only download files. Peers also share low quality files or unpopular files. These selfish behavior of peers is referred to 'free riding'. The free riding of peer may decrease participation of other peers or the system performance. In this paper, we propose an incentive mechanism, called IcMFS (Incentive Mechanism for File Sharing System), which provides the correct use of incentive mechanism using trust peer, computes contribution values referring behavior of peers and rewards peers. The proposed mechanism assigns bandwidth and TTL(Time-To-Live) to a peer and differentiates the use of service. A case study on simulations shows the service differentiation according to the contribution value of peer, the correct use of incentive mechanism using trust peer and the advantage by use of trust peer. To prove the stability of proposed mechanism, we also show the disadvantage that a peer receives from the incorrect use of incentive mechanism.

• Journal of Korea Multimedia Society
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• v.11 no.3
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• pp.353-363
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• 2008

A multi-agent system has a longer learning period and larger state-spaces than a sin91e agent system. In this paper, we suggest a new method to reduce the learning time of Nash Q-learning in a multi-agent environment. We apply Macro-actions to Nash Q-learning to improve the teaming speed. In the Nash Q-teaming scheme, when agents select actions, rewards are accumulated like Macro-actions. In the experiments, we compare Nash Q-learning using Macro-actions with general Nash Q-learning. First, we observed how many times the agents achieve their goals. The results of this experiment show that agents using Nash Q-learning and 4 Macro-actions have 9.46% better performance than Nash Q-learning using only 4 primitive actions. Second, when agents use Macro-actions, Q-values are accumulated 2.6 times more. Finally, agents using Macro-actions select less actions about 44%. As a result, agents select fewer actions and Macro-actions improve the Q-value's update. It the agents' learning speeds improve.

• The Journal of the Korea Contents Association
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• v.8 no.7
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• pp.233-242
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• 2008

Sales-force management practices(e.g., selection, training, rewards, evaluation) constitute a crucial aspect of the sales force control system, as they influence on the salesperson's role ambiguity, satisfaction and performance. But it is difficult to find studies on the effects of hotel's sales force control system. So, we studied about this subject more deeply. The purpose of our research is to examine important relationships among sales force control system(e.g., sales territory design, training, reward, training, supervisor's support), job attitudes(satisfaction and role ambiguity), and sales force performance. A conceptual model is presented and hypotheses are developed. This study contributes to sales management research of hotel sales person in some important ways. This study offers new insights both to sales practitioners and researchers. First, this study introduces a new approaching method for developing new model of hotel sales-force research. Second, in the practical implications, managers should take actions as like an encouragement, direction, monitering, and education of sales know-how to reduce the employee's role ambiguity and to improve job satisfaction and sales performance.

• Fashion & Textile Research Journal
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• v.16 no.1
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• pp.79-90
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• 2014

With the development of modern society, not only have the Internet and e-commerce been progressed but they also made 'consumption patten' diverse. Despite the internet clothing market growth, there is critical a disadvantage, which is consumers is not able to wear the products presented via online pictures. Thus, pictures on the internet are the only information customers can get, which has caused consciousness on the importance of dealing with 'customer review'. In spite of the fact that 'customer review' has undeniably evolved to be one of customers' essential requisites, the research on this subject is very limited. Until now, the studies on the internet shopping consumers' behavior mostly has to do with the features of 'customer review' such as 'a sense of exaggeration', 'usability', 'duality', 'purity', 'professionalism', 'reliability', and the 'similarity', etc.) Therefore, this study categorizes the characteristics of online shopping reviews to 'the number of reviews', 'the article-length', 'the existence of photos', 'the rewards for reviews', 'the contents of the reviews' and 'the freshness of the reviews' and reviews the impact of an features of 'customers' reviews' affecting the internet shopping sales promotion. Moreover, it is to contribute to the marketing strategies of a shopping mall by analyzing consumers' 'purchasing satisfaction', 'the intention of repurchasing', and 'the factors of viral marketing'.

• Journal of Fashion Business
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• v.18 no.1
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• pp.118-131
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• 2014

The purpose of this study is to classify the service recovery fairness of internet fashion shopping mall depending on the type of shopping mall into 3 levels, and analyze their influence on customers' satisfaction and intention to repurchase. Data were collected from 271 customers who had made a complaint or raised a question about service among the customers, and was analyzed through AMOS 7.0. For hypothesis testing, a research model was set up in the form of structure equation model, and its suitability was investigated. The results of this research can be summarized as follows: First, in relation to the service recovery fairness at internet shopping mall, only the consequential fairness has a meaningful relationship with customer satisfaction. Second, it has been shown that the higher the customers' satisfaction with internet shopping mall, the more positive influence it has on intention to repurchase. Third, it has been shown that the influence of service recovery fairness on customers' satisfaction and intention to repurchase has a meaningful difference depending on the type of internet shopping mall. In other words, it has been shown that customer satisfaction is higher at open market than general internet shopping mall. In addition, it has been shown that in open market, only the consequential fairness has a meaningful influence, therefore it will be more effective to strengthen a strategy focused on economical rewards than other fields.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.7
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• pp.156-161
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• 2020

In an environment that operates multiple UAVs, the use of a decentralized task allocation algorithm has more robustness from a single failure of UAV on the mission because there is no central command center. In addition, UAVs have situational awareness and redistribute tasks among themselves, which can expand the mission range. The use of multiple UAVs in a mission has increased as the agent hardware has decreased in size and cost. The decentralized mission-planning algorithm has the advantages of a larger mission range and robustness to a single failure during the mission. This paper extended the type of mission the uses CBBA, which is the most well-known decentralized task allocation algorithm, to the point mission and en-route mission. This will describe the real mission situation that has the purpose of surveillance. A Monte-Carlo simulation was conducted in the case of multiple agents in the task-rich environment, and the global rewards of each case were compared.

• The Journal of the Korea Contents Association
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• v.18 no.4
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• pp.223-233
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• 2018

This study examined the factors influencing the suicide prevention gatekeeper participation of 299 grassroots organizational leaders in Gangwon province. For this purpose, participation of activities of suicide prevention gatekeeper was classified into performance intention and intervention level. Performed hierarchical multiple regression analysis by setting participation motives which showed a significant correlation with participation of suicide prevention gatekeeper as independent variables. As a result of the analysis, participation motives affecting performance intention were a sense of mission as a leader, benefits or rewards for activities, the meaning and purpose of suicide prevention, government policy. And participation motives affecting intervention level were invitation of public officials, the meaning and purpose of suicide prevention. Based on the results of this study, suggested implications for the participation of suicide prevention activities in community grassroots organizations and suggestions for future activation.

• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.2
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• pp.181-186
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• 2016

This study collected data of college students' volunteering for maritime and fisheries and found that only few subjects participated in it. They took part in control for release of oil, services for sea village and coastal cleansing. Most were satisfied with their volunteering referring contributing to environment protection, self-fulfillment, social interaction, gaining special experiences and assimilation with nature. The subjects were not satisfied with lack of systematic and effective services, monolithic activities, insufficient publicity, deficient rewards and a shortage of self-capacity. Based upon the research findings, implications for college students' volunteering policies were suggested to promote volunteering for maritime and fisheries.

• Korean Journal of Psychosomatic Medicine
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• v.13 no.1
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• pp.41-48
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• 2005

Objectives : The aim of this study was to investigate the attitudes and opinions toward psychiatry of students and professionals for social welfare. Methods : 67 students and 34 social workers joined to this study completed the attitudes and opinions scale and the quality of life scale successfully. Results : On the attitude scale, in factor 'overall merits of field of psychiatry' and factor 'possible abuses and social criticisms', and factor 'career and personal rewards', the social workers have more positive attitude than other group, in factor 'role definition and functioning of psychiatrists', the female sex have more positive attitude than the other sex. It showed significant correlation between activity factor in quality of life scale and possible abuses and social criticisms in attitude scale. Conclusion : The contact with patients with psychiatric disorders will have a good impact on the personal attitude toward patients. It is important that the students for social welfare would receive appropriate psychiatric education program.

• The Journal of the Korea Contents Association
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• v.14 no.6
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• pp.54-62
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• 2014

Crowdfunding, a way of raising small size investments or donations from numerous individuals, mostly through internet to fund a project, has attracted global interests. The growth of the social network platform has made crowdfunding easier especially for those in the arts and culture sector. Despite the growth of such vehicle, there has been not much empirical research on the subject. We investigated the relationships between the information in the web sites and its contribution to the success in fundraising. We have sampled 161 projects that were uploaded on Tumblbug.com and studied the type of information that lead to a successful fund raise. As a result, we fould that the contents characteristics including motion-pictures, images, and lengthy texts have positive impacts on the success of fundraising. Fundraising rewards did not show any impacts.