• The Journal of Society for e-Business Studies
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• v.17 no.2
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• pp.105-114
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• 2012

Recently, global warming, energy shortage, and environmental disruption have been serious problems in every nation. It became more and more important to reduce the emission of CO2 and to use of energy efficiently. Smart grid was also introduced using the rapidly developing information technology. It deployed the mutual communication concept between customers and the suppliers in the electricity supply. There were increasing demands to adopt the smart meter and to present incentive for efficient energy usage in many developed countries. The objective of this research was to develop the optimal real time pricing model which maximized the profit of the power retailer and reduced the usage of energy. The simulation study was given to show the usefulness of the model. Simulation considered the customer demand response rate and price elasticity rate. The price elasticity rate was compared in the condition of fixed value according to time and variable value according to the customers. The optimal price model could maximize the profit of the power retailer and reduce the energy usage of the consumers.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.5
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• pp.560-571
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• 2019

In line with the United Nations' Action Plan for the First and Second World Programme for Human Rights, countries around the world are making efforts to strengthen and develop human rights education through voluntary participation and improvement of the legal system. South Korea is also trying to spread human rights education under the leadership of the National Human Rights Commission of the Republic of Korea, but there has been no significant progress so far. Moreover, it has failed to pay close attention to the human rights issues of seafarers on board. This study identified the phenomenological problems based on an analysis of domestic and international literature, and of cases of violation of seafarers' human rights. It utilized the interactivity research method to create an educational environment for improving the human rights situation of seafarers on board mixed-nationality crew vessels. In doing so, the research suggests the introduction of human rights education for seafarers and the implementation of a human rights education program in designated educational institutions as fundamental solutions to the human rights issues of seafarers, as these have been pointed out as the main cause of conflicts in mixed-nationality crew vessels.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.32 no.6
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• pp.1103-1112
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• 2022

Blockchain technology is widespread in everyday life and various industry fields. It guarantees integrity and transparency between blockchain network participants through a distributed ledger. The smart contract is modifying and managing the distributed ledger, which is the most important component of guaranteeing integrity and transparency of blockchain network. Still, smart contracts are also a component of blockchain networks, it is disclosed to network participants transparently. For this reason, the vulnerability of smart contracts could be revealed easily. To mitigate this, various studies are leveraging TEE to guarantee the confidentiality of smart contracts. In existing studies, TEE provides confidentiality of smart contracts but guaranteeing the integrity of smart contracts is out of their scope. In this study, we provide not only the confidentiality of smart contracts but also their integrity, by guaranteeing the CFI of smart contracts within TEE.

• Journal of Korean Home Economics Education Association
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• v.32 no.1
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• pp.89-105
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• 2020

This study aimed at analyzing the clothing management units of technology and home economics textbooks in terms of their contents related to Education for Sustainable Development(ESD). The inquisitive tendency of the textbooks was also examined adopting the modified Romey's method, because it is known as an important factor in increasing student's class participation in sustainable clothing management and inducing practical behavior. First, the learning contents of clothing management unit were analyzed according to the social/political/cultural, environmental, and economic perspectives of ESD. As a result, ESD contents from social/political/cultural perspectives (safety, and health and food), environmental perspectives (natural resources, energy, and environmental problem), and the economic perspectives (sustainable production and consumption) were identified, with a heavy focus on environmental perspective. Secondly, Romey's inquisitive content analysis method was modified to analyze texts, pictures/charts, and learning activities of the clothing management unit. In all textbooks, facts and definitions were the dominant types of contents, which means less opportunities for development of inquiry ability. In conclusion, the ESD contents of the clothing management unit are inclined to the environmental perspective, and it is necessary that textbook development would need to be balanced between three perspectives. Also, future textbook authors will need to improve the inquisitive tendency of the textbooks to encourage student participation in class and induce practical application in real life.

• Journal of the Korean Geographical Society
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• v.40 no.1 s.106
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• pp.109-125
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• 2005

The purpose of this study is to develop a role play instruction model to increase higher-order thinking abilities in geographical education. This study reviewed the references which included the contents of higher-order thinking abilities, and discussed the educational significance and application of role play instruction model. The developed role play instruction model was applied to four classes in high school in Korea. After applying the model, this study asked some question about the model to the students which engaged in this model. Higher-order thinking essentially means thinking that takes place in the higher-levels of the hierarchy of cognitive processing. Higher-order thinking abilities contain critical thinking abilities, creative thinking abilities, problem solving and decision making abilities, meta-cognition abilities. The role play instruction model is an effective method which can increase higher- order thinking abilities. The questioning to students which engaged in the class of applying to role play instruction model provides feedback about development instruction models to increase higher-order thinking abilities.

• Journal of the Korean Society for information Management
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• v.22 no.2 s.56
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• pp.185-204
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• 2005

The purpose of this study was to analyze the motivation of participation in the public library volunteers, and what factors influence on continuity and intensity of volunteer activity. It analyzed the questionnaires from 109 public library volunteers in Daegu Metropolitan City. First, public library volunteers were mainly participated by motivation for personal achievement and concerns on local welfare problems. Second, in case of the factors on the continuity and intensity of public library volunteer activity, four factors selected based on literature review had significant effects on each variables. Third, the loyalty on the public library newly investigated had also significant effects on the continuity and intensity of public library volunteer activity.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.1B
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• pp.31-39
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• 2007

Wireless sensor network can increase independence and flexibility of network because it consists of mobile node without the aid of fixed infra, but, by unrestricted for the participation and breakaway of node, it has the difficulty in routing which is a basic function of network operation. To solve those problems, a suggestion is the location-based routing algorithm using geological or logical location information. The suggested algorithm which is based on cluster for location information of sensor is applicable to wireless sensor network of discrete situation, which guarantees extension and mobility. By efficiency analysis and reactive routing algorithm of current DSR and AODV, packet transmission ratio, routing overheads, and average communication expense is compared as node increases.

• Journal of Korea Game Society
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• v.5 no.4
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• pp.33-38
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• 2005

In the online game that thousands of participants connect to a game world by using Internet simultaneously, participants of the game world may have different hardwares and network environments, and messages of participants should be synchronization. A solution for the synchronization problem is to wait for a certain amount of time until the server processes the message. It is not easy to determine a suitable waiting period because of the trade-off between the fairness and the responsiveness. In this paper we propose a method to decide a waiting period by considering features of the MMOFPS game and the probability of interaction among participants. We implement the proposed method and perform experiments for the performance evaluation.

• KOREAN POULTRY JOURNAL
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• v.36 no.8 s.418
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• pp.104-109
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• 2004

지난해 12월 국내 첫 HPAI발생 후, 방역당국의 발생지역 반경 3km내의 살처분에 대하여 우리는 처음부터 외국의 연구자료와 발생대처사례, 국제기구(FAO, OIE, WHO)의 권고 등을 참고하여 불행하게도 감염된 농장은 살처분 하더라도, 차단방역을 충실하게 실시한 미 감염농장만이라도 국가 관리하에 백신을 사용하여, 무차별 살처분으로 인한 억울한 농가피해와 매립으로 인한 인력동원, 환경오염, 막대한 국가재정보상부담을 줄일 수 있는 살처분과 백신병용(이하 백신 병용이라함)정책을 채택해 줄 것을 제의해왔다. 그러나 방역당국의 대책위에 참여하고 있는 교수(이하 방대위라 함)들은 이에 대해 지속적으로 반론을 제기하며, 심지어 관련 학자들의 인격문제까지 거론한다면서, 이에 대한 공청회를 요청(양계연구 4월호)하여 이에 답하고자 한다. 우선 우리는 공청회 요청에 대해 기꺼이 응할 수 있음을 전하고 싶다. 그러나 공청회는 정부가 정책을 추진하기 위해, 이해 당사자들의 의견을 수렴하기 위한 것이므로, 양계농가와 양계협회가 주관하여 관련 교수들과 소득 없는 논쟁에 그쳐서는 안되며, 이 중차대한 국가대사에 반드시 정부관련 부처가 주관하여, 가능하면 입법부 관련 의원들까지 함께 하는 자리에서 이해당사자인 백신병용주장농가와 살처분고수학자 및 관련당사자가 참여하여 충분한 토의를 거쳐, 향후 HPAI 재발시 반드시 방역정책에 반영될 수 있는 계기가 되어야 한다고 생각한다. 또 공청회 개최를 요구하면서, 이어 필자가 관련신문 및 월간지를 통해 백신병용을 요구한 기고문에 대하여, 장론의 반론을 제기함으로(양계연구 4월호), 이에 대해 덧붙여 답변하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.588-591
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• 2002

P2P(Peer-to-Peer) can compose free network and take away center server function or problem about authentication is risen between each User because is opening network that can participate between each User weakening. We desire to authenticate request about service to user who is admited between each user to limit connection. Wish to admit Kerberos authentication mechanism to mechanism that can do information sharing safety in P2P environment to solve this in this treatise and design authentication mechanism.