• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.2A
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• pp.179-187
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• 2011

Recently, cognitive radio attracts lots of interest to effectively utilize the limited spectral resource. In the previous researches, we proposed a method to enhance the system capacity of the overall network by using Selfish Symbiotic architecture and Non-selfish Symbiotic architecture. In this research, we further enhance the previous works to OFDM-based CR networks by using efficient subchannel allocation. The system performance is evaluated through intensive simulations with multiple primary users as well as a single primary user with different numbers of CR users.

• Journal of Korea Multimedia Society
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• v.12 no.11
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• pp.1593-1608
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• 2009

If a certain relay node in multi-hop wireless networks might become a malicious node that does not cooperate with other nodes or a selfish node, network throughput will be dramatically decreased. Most of existing ad hoc routing protocols assuming that the nodes will fully cooperate with other nodes do not resolve the problem of network performance degradation due to malicious and selfish nodes. This paper presents the CARE (Cooperative Ad hoc routing protocol based REputation) scheme incorporating the reputation management that can achieve a multi-hop wireless network with high throughput performance. The proposed scheme provides the horizontal cross-layer approach which can identify misbehaving malicious, selfish nodes dropped out of the hop-by-hop based packet processing in the network and then set up an optimal packet routing path that will detour misbehaving nodes. And the vertical cross-layer approach contained in the CARE scheme attempts to improve the quality of routing paths by exploiting the quality of link information received from the MAC layer. Besides, it provides high TCP throughput by exploiting the reputation values of nodes acquired from the network layer into the transport layer. A case study on experiments and simulations shows that the CARE scheme incorporating vertical and horizontal cross-layer approaches yields better performance in terms of the low rate of packet loss, fast average packet delivery time, and high TCP throughput between end-to-end nodes.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.7 no.2
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• pp.271-286
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• 2000

This study is designed to investigate what elders think about the meaning of aging. We have used Q-methods to identify meaning of aging from elders, and developed self-referenced surveys to analyze characteristics In this study, we used a non-structured method to select Q sampling. From 183 Q populations, we selected 36 Q sampling. A total of 32 persons sixty-years or older were randomly selected for P samples, When the Q-sorting was complete, we interviewed the participants at both end of the extremes(agree or disagree), and documented their responses. We used PC QUANL to process the data and used principal component analysis for Q factor analysis. There were five subjective types for the meaning of aging by elders. Of the 32 P-samples of elders, 11 were identified as Type 1, 7 as Type 2, 2 as Type 3, 8 as Type 4, and 4 as Type 5. Type 1 : 'Matured elders' Elders wished the well being of their children, thought older persons should maintain good health, worried about becoming senile, and dependent God believing in life after death. Type 2 : 'Assertive-Rights' Elders categorized as Assertive-Rights insisted on their rights to life as a person. Type 2 elders characterized themselves as people who should keep themselves healthy, become weak and lack sexual desires, act selfish like a child, need to be protected, and be financially independent. Type 3 : 'Passive-Dependents' Elders characterize themselves as those who pray for their children's well being, worry about the children even after their death. and becoming senile. Type 4 : 'Hopeless' The 'Hopeless' type of elders characterized aging as a time to pray for their children, insignificant beings, thoughts were selfish and child-like, poor, worried about going senile, regret their life overall, and preferred to die than to live as an old person. Type 5 : 'Attached-Present' The 'Attached-Present' type of elders thought elderly characterized themselves as acting selfish and child-like, wiser, anxious, regret their life, stand aloof of greed and worldly things, being a model for the society, and deserving to be treated with filial respect. Thus far, Korean elders seemed to have a positive and negative meaning of aging due to the current changes in the society, value system, and family structures. The above five subjective meanings of aging confirm that we need to approach and nurse the elderly differently. Years of aging are a part of and a natural process of life with various physical, psychological, and sociological changes. Nurses need to assist elderly to find the positive meaning of their life by providing appropriate physical, psychological, and social support at an earlier stage in nursing. Based on this study, we could derive the following two implication from the perspectives of science of nursing to care for elders. 1) Based on the studies investigating the type of meaning of aging, we could develop tools to assist in nursing intervention programs for elderly. 2) Based on research on the meaning of aging for different developmental stages of life, we could develop a model for roles for different family members in nursing and caring for the elders.

• Journal of The Korean Digital Architecture Interior Association
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• v.3 no.2
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• pp.20-29
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• 2003

It is an obstacle to improve living environments that an acute angle architectural design is often seen. Though that design give a stress to the neighborhood, we can't prevent the design taking place. We must control architectural design, because it is important to public worth and urban aesthetic. To prevent selfish architectural design, it is recommend to extend design review and reflect neighborhood opinions.

• Journal of the Korean Home Economics Association
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• v.46 no.6
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• pp.89-100
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• 2008

The purpose of this study was to provide basic data for the familial voluntary service of the Healthy Family Center and then verify the effectiveness of its application in order to improve family healthy through a familial voluntary service. Study subjects were both volunteers who belonged to family volunteer corps of 12 Healthy Family Centers. Collected data was analyzed SPSS WIN 12.0 program. The results were as followed. First, a 54.1% of subjects is taking part in a familial voluntary service, while a 45.9% of them is not. Their positive intention of future participation is a 77.4%. The period of participation is from 6 months to two years. The frequency of participation is once or twice a month, and the length of activities per participation is for 3 hours. They have taken part in the service with a variety of public relations, and their motive of participation is by and large selfish. Second, as for the influence of participation in a familial voluntary service upon family healthy, the family healthy of participant group is higher in all the four sub-variables of family healthy than that of other groups. The group of which frequency of participation is once a week is better in family communication than the group of which frequency of participation is once or twice per month. The group of which motive of participation is altruistic is higher in sharing a value system among families than the group of which motive of participation is selfish.

• English Language & Literature Teaching
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• v.12 no.4
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• pp.235-251
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• 2006

This study aims to analyze what Saul Bellow wants to define "Love" in his recent work, More Die of Heartbreak. As a humanist, Saul Bellow is concerned about materialism in Post-modern age through his works. Today there are so many people that are hurt by the failure of love or experience heartbreak. We need to sense invisible danger all around us. We can find Bellovian love in More Die of Heartbreak. Bellow suggests that there should be "true love" between people, especially between men and women. But Kenneth Trachtenberg and Benn Crader have selfish and materialistic love. Kenneth had only a sensual desire for Treckie who is his daughter's mother. He cannot persuade Treckie to marry him. Benn, a middle-aged widower, peremptorily marries Matilda Layamon who is much younger than he. Unfortunately, the marriage brings him neither peace nor love. Benn recognizes his wrong conception of love through the death of Mrs. Bedell and Villitzer, and breaking off a marriage with Matilda. He decides to go to Antarctica. This is not an escape. This is his determination to save himself. At the North Pole he sets out to recover his gift of vision and redeem his fall from grace. He will desert his materialistic and absurd self. After the expedition, he will experience rebirth as an authentic human being who has acceptable eyes. Kenneth and Benn learn to conceive of love as one of man's strongest inner energies, for it is through love that you can penetrate to the essence of human being. In this study I try to define Bellovian love. In More Die of Heartbreak, love is a spiritual power that may even transfigure man.

• Journal of Communications and Networks
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• v.14 no.3
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• pp.286-295
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• 2012

To meet the increased demand of video-on-demand (VoD) services, peer-to-peer (P2P) mesh-based multiple video approaches have been recently proposed, where each peer is able to find a video segment interested without resort to the video server. However, they have not considered the constraint of the server's upload bandwidth and the fairness between upload and download amounts at each peer. In this paper, we propose a novel P2P VoD streaming system, named peer cache adaptation (PECAN) where each peer adjusts its cache capacity adaptively to meet the server's upload bandwidth constraint and achieve the fairness. For doing so, we first propose a new cache replacement algorithm that designs the number of caches for a segment to be proportional to its popularity. Second, we mathematically prove that if the cache capacity of a peer is proportional to its segment request rate, the fairness between upload and download amounts at each peer can be achieved. Third, we propose a method that determines each peer's cache capacity adaptively according to the constraint of the server's upload bandwidth. Against the proposed design objective, some selfish peers may not follow our protocol to increase their payoff. To detect such peers, we design a simple distributed reputation and monitoring system. Through simulations, we show that PECAN meets the server upload bandwidth constraint, and achieves the fairness well at each peer. We finally verify that the control overhead in PECAN caused by the search, reputation, and monitoring systems is very small, which is an important factor for real deployment.

• Journal of Korea Society of Industrial Information Systems
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• v.16 no.2
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• pp.155-169
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• 2011

Adolescent volunteer, a kind of experience activity, can have positive influence on the improvements of sound personality, community ownership, and leadership living skill ability. However, its purpose is today declining because it tends to be only used for the adolescent university admission. This study investigates the impacts of adolescents' volunteer participation motivation(selfish and selfless) on leadership living skill ability(human relationship skill, group activity skill, learning skill, and self-understanding skill) and satisfaction. The study conducted a survey and utilized 222 questionnaires to examine these relationships. The results are as follows. First, selfless participation motivation had significant impacts on four leadership living skill abilities and satisfaction. Second, selfish participation motivation had no significance on four leadership living skill abilities, but had negative significance on satisfaction.

• Korean Journal of Child Studies
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• v.26 no.1
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• pp.91-105
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• 2005

This study investigates the meaning, the method of "Cultivation of the fundamental" as aim of child education in context of the Xing-Li-Xue(性理學) educational theory. Chu-hsi understood the meaning of "Cultivation of the fundamental" as Ching(敬, the cultivation of good nature in human mind). The method of "Cultivation of the fundamental" consists of quiet sitting(정좌), attention(주의집중), moral environment(도덕적 환경) and practicing propriety(예의 실습). Through quiet sitting and attention, learners may reach a condition of mind which is free of their selfish desires and in which they can find out their original nature. The education in Confucianism accepts the environment as a significant element in forming human personality. Making moral environment has leaners to take good value with ease. Characteristic of study in Xing-Li-Xue is to emphasize to observe concrete clauses of propriety. The reason why Xing-Li-Xue emphasizes propriety is that Mind Study may be maintained through Body Study. In conclusion, the "Cultivation of the fundamental" in the Xing-Li-Xue is to form the power to regulate selfish desires and thus behave more moderately. Along these points, not only quiet sitting which relexes the body and soul, but also song and dance are not considered as contrary to Xing-Li-Xue educational theory. The various ways of "Cultivation of the fundamental" of Xing-Li-Xue educational theory make people recognize, understand and experience good innate nature of human beings. And we can reach the conclusion that education of Xing-Li-Xue uses so many methods that learner can accept moral value as naturally as possible.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.10
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• pp.46-53
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• 2016

The purpose of this study is to analyze the cognizance of AIDS by applying the Q methodology, as well as to provide preliminary data for developing AIDS prevention campaigns. A Q population was identified from a literature search and in-depth interviews. The study process analyzed the P sample, the study participants, using the Q-sorting methodology to produce the Q sample, which is composed of statements from October 20 to 27, 2014. 20 participants (analyzed) 27 statements and 3 types of AIDS cognizance were produced as a result. These types are 1(N=9), 2(N=6), and 3(N=5), which correspond to denial, social support, and selfish motivation, respectively. The members of the denial type had a strongly negative opinion about AIDS, whereas the social support type showed a friendly gesture. The selfish motivation type took a neutral stance. The common and different points, as well as the distinctive features of these types, were studied. The accomplishments of this study include suggesting an efficient strategy for making an AIDS control policy, as well as a qualitative analysis, through the employment of the Q-methodology, which is useful for understanding human beings' (internal viewpoint).