• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.271-274
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• 2017

An educational institution issued a degree certificate to those students who have successfully completed all studies included in different levels of the degree program. The degree certificate presented by the University is of major significance in the person's life but the fabrication and circulation of fake certificates is inexpensive because a paper document can easily be forged with the availability of advance printing and copying technologies. So, there is a need to adopt a centralized authentication process that can verify and ensure the authenticity of a document. In order to prevent the spread of fake degree certificates a method is proposed where the integrity of the contents with in the certificate can be verified with the use of and Smart Phone Application. A Quick Response (QR) Code will contain a digital signature over the data such as degree holder's name, major program, Grade Point Average (GPA) obtained etc. Which will be signed by university authorities after the registration in central system and deployed in university. In order to verify the digital signature a person need to use a specific smart phone application which will scan and authenticate the certificate without gaining access to a user's security credentials such as password.

• Journal of the Korea Society of Computer and Information
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• v.8 no.3
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• pp.1-8
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• 2003

The growth of Internet is the main factor that activates the Digital Contents Market. However the Digital Contents Market could be shrunk by an illegal reprinting and imprudent using. Therefore we urgently need a new technology which can prevent the contents from illegal using, illegal reprinting and imprudent using. We developed the system prohibits a imprudent using in order to activate the Digital Contents Market. We developed the system protects the contents safely by removing the dangerous for the illegal reprinting with providing the encoded contents and the system removes the contents according to the number of usage and the user authentication through Network.

• Korean Institute of Interior Design Journal
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• v.16 no.4
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• pp.62-71
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• 2007

Due to the shortage of elderly care services in urban areas, multi-functional welfare facilities are proven to be very effective for delivering various service needs of elderly in Japan. Introduction of new longterm care policy for elderly in Korea would change many aspects of elderly care service facilities. Especially elderly home care services like adult daycare centers will expand drastically after beginning of elderly longterm care insurance. The purpose of this research is to study and analyze multi-functional welfare facilities in Japan focusing on the types of day service in those facilities. Planning of daycare centers in multi-functional welfare facilities for the elderly can be classified to 8 types. Those types are daycare centers with senior housing, longterm care insurance facilities, senior centers, small multi-function facility, medical facilities, educational facilities, community facilities and general housing projects. Each type has different benefits for the networking of services for the elderly. Design of daycare centers in multi-functional welfare facilities have distinctive features in entrance and user approach, space allocation and circulation planning. The study of daycare centers and multi-function planning should be followed to make better home care environments for the elderly in Korea.

• Journal of Information Management
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• v.39 no.2
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• pp.75-94
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• 2008

Korean university libraries has lead the advancement of library service by adopting state-of-art technology for the improvement of information service provision, which therefore contributes to the consolidation of the status of the library as a center of information circulation among related institutions. This paper examines the current conditions of wireless internet service provided by the university libraries. First, it takes 'WDL mobile campus consortium', which is an organized movement with many university libraries involved, and explores their major issues such as wireless internet service environment, platform components, service components and functions, user environment and usage. Finally, this paper makes suggestions for the continuous advancement of the university libraries' wireless services.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.607-612
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• 2006

A pressure-type rapid automatic filter of 2000mm diameter and 170 ton/h filtering capacity was fabricated. In case of no external impurity inflow, the turbidity removal efficiency on raw water was experimented and the numbers of impurities of each sizes were analyzed by particle counter. As the result of circulated filtering, the raw water of 40 NTU was filtered to 0.44 NTU and the numbers of impurities above $1{\mu}m$ were removed by approximately 95%. With the filtering efficiency experimented and the mathematical method, the turbidity change of circulation water were calculated according to the inflow rate of external impurity and water treatment method of blow-down or filtering. The cost of blow-down water was calculated from above results. And simple payback period for this filter is calculated as about one year. Nowadays, as the cost of water is continuously increasing and environment regulations will be more strict, the water quality control using this filter will be expected to satisfy the user requirement.

• Archives of design research
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• v.17 no.1
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• pp.89-98
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• 2004

A systemic approach to behavior on the basis of human psychology is needed for behavior-centered space design. Also, the recognition that human and environment, in all, have complementarity is needed- human and space shall be understood as a general phenomenon, supposing interaction. Design of behavior-oriented space means configuration and coordination of physical subjects as well as understanding, analysis and reflection of psychological and behavioral phenomena. It is analysis of a private individual as well as understanding of interaction between human groups, as well. In respect of space recognition, analysis not on material movement but on energy circulation and variable is important. It means that the understanding of user's behavior and psychology does not orient reasonable purpose just for convenience. That is, such understanding intends to understand behavioral patterns and psychological phenomena between space and human beyond the decomposition of structure of human and space into physical elements and the design based on standardized data. Thereby, more human-oriented space design might be implemented by the understanding of behavioral essence. Also, a user-centered design process from another viewpoint might be created, and the general amenity among man, space and environment - better environmental quality - might be produced. For this, the consciousness of human activity that is, activity system shall be ahead of it, and the approaches for design shall be implemented into a process not in predictive ideas but in semi-scientific system. On the basis of the above view, this study was attempted to investigate the orientation of design to recognize space as another life, and explore a process where it is drawn into a design language on the basis of human behavior. If the essence of space behavior and the activity system are analyzed through user observation and it is reflected upon a space design program and then developed into a formative language, a new design process on human and environment might be produced. In conclusion, the reflection of user's behavior and psychology into design, contrary to existing public space design based on physical data, can orient quality improvement of human life and ultimately be helpful to the proposition, 'humanization of space'.

• Proceedings of the Korean Geotechical Society Conference
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• 2010.09a
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• pp.800-807
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• 2010

In this study, a series of numerical analyses has been performed in order to evaluate the performance of a full-scale closed-loop vertical ground heat exchanger constructed in Wonju. The circulation pipe HDPE, borehole and surrounding ground were modeled using FLUENT, a finite-volume method (FVM) program, for analyzing the heat transfer process of the system. Two user-defined functions (UDFs) accounting for the difference in the temperatures of the circulating inflow and outflow water and the change of the surrounding ground temperature with depth were adopted in the FLUENT model. The thermal properties of materials estimated in laboratory were used in the numerical analyses to compare the thermal efficiency of the cement grout with that of the bentonite grout used in the construction. The results of the simulation provide a verification of the in situ thermal response test data. The numerical model with the ground thermal conductivity of 4W/mK yielded the simulation result closer to the in-situ thermal response test than with the ground thermal conductivity of 3W/mK. From the results of the numerical analyses, the effective thermal conductivities of the cement and bentonite grouts were obtained to be 3.32W/mK and 2.99 W/mK, respectively.

• Journal of Korean Library and Information Science Society
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• v.38 no.3
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• pp.247-276
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• 2007

The purpose of this study is to analyze the survey and prove the role and impact of teacher librarian's professionalism on the School Libraries Revitalization. The samples of the survey, consisted 96 school libraries in Kyungbuk Province, were revitalized before 2005 by School Library Revitalization Project of Ministry of Education and Human Resources, Korea. The samples were divided into two groups; the one group consisted of 47 libraries managed by teacher librarian, and the other group consisted of 49 libraries which were managed by class teachers who are not majored in Library Science. The questionnaires were mainly conducted by survey but interview, telephone, and e-mail method also used. The state of the art of the library management, including budget, acquisition, cataloging, collection management, circulation, information technology, and the services for the faculties and students between two groups were analyzed and compared. The results showed that teacher librarian group offers more user-tailored and intensive services than class teacher group.

• Journal of Korean Library and Information Science Society
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• v.39 no.2
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• pp.267-289
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• 2008

The implication of space in school libraries more important than the other types of libraries because their main user is students who are affected by service environment. Let me consider the reality of our circumstance, the space is not enough in the school library, Therefore, it is essential to utilize of library space effectively. So, this study intends to suggest effective organization model of school library space, through introduced by the notion of information commons. The results show that they are integrated within school library, which, in addition to other functions, may include recreation center, and interactive community, circulation space, administrative offices and so on and suggest the library space design and management need to reflect the flexibility and inter-activeness of the space. Also, in order to acquiring human-centered aspect and openness, school library appropriate space planning for present needs and future expansion is imperative within school community.

• Journal of KIISE:Information Networking
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• v.28 no.4
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• pp.641-650
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• 2001

In recent years, e-Commerce is very active on the Internet, especially the World Wide Web along with the popularization of Internet using high-speed networks. Especially, Electronic Software Distribution(ESD) is widely being focused as one of the popular researches. However, the existing models of ESD lack substantial illegal copy protection or copyright protection as they have the shortcomings of guaranteeing anonymity of users. This study suggests an ESD protocol that guarantees substantial copyright protection and anonymity based on the Public Key Infrastrncture(PKl). The suggested method does not give the information of a buyer who doesn't want to reveal to a seller, and protects illegal copy and distribution as well. When it happens that illegal copies are in circulation, this method provides a device to trace back its original distributor so that it helps protect the copyright. In addition, it provides more convenient environment to the user by not using the methods of serial number input and extra installation to use.