• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.12
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• pp.1945-1955
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• 1993

Two types of key distribution protocols with user authentication are proposed for PCS(Personal Communication Service) and digital mobile communication systems. In this paper, we investigate the service procedure and security requirement for PCS. also discuss the security problems of KDPs previously proposed for digital mobile communication, and show that Park`s type II among the schemes is easily broken by an impersonation attack. Our proposed I, II are based on the modified cryptosystem of Rabin and ElGamal, and reduce the amount of computation for user authentication. Such a reduction is good solution coped with the limited capability of user terminal on PCS. As a result of making a comparison between our schemes and the previously presented schemes, we can know ours are more secure and efficient for PCS.

• Journal of the Korean Society for Library and Information Science
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• v.44 no.1
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• pp.5-28
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• 2010

This study analyzed the characteristics of library service users' information seeking behavior based on the grounded theory methodology. After interviewing twelve undergraduate students, the researcher coded the data based on the grounded theory methodology. As a result of the entire coding processes, this study constructed the library service users' information seeking behavior model. According to the model, the following ten factors are important when explaining library service users' information seeking behavior: the information users' environment, other people, users' experiences, recognition of information sources, information provided, memory, a need-creating environment, information gathering, information use, and satisfaction and/or dissatisfaction.

• Journal of the Korean Society for information Management
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• v.23 no.2
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• pp.113-127
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• 2006

This paper addresses issues related to the design of an interface supporting fine grained interaction with documents, focusing on a particular type of scholarly documents, journal articles. In order to make a usable interface we need to understand user behaviors as well as technologies that present new possibilities of enhancing user experience. This paper reviews studies along three dimensions : user information behavior in searching/using documents, new conceptual/technical models for electronic documents, and interaction mechanisms. Putting together the understanding of users and enabling technologies, requirements and considerations in developing systems with granular interactions are discussed in the conclusion.

• Journal of Korean Library and Information Science Society
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• v.33 no.1
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• pp.121-141
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• 2002

In this paper, I presented that transformation of library from the collection management to knowledge contents management along with paradigm shift under the web-based multimedia information environment is required. Effective web contents management call maximize users'satisfaction with personal customizing services for library users. Especially, contents customizing service using the metabrowsing service contributes to maximize the user'satisfaction by supplying core contents that the user seeks. In this paper, I studied the scheme of knowledge contents management to increase of user'satisfaction, concentrating on the management factors of web-based multimedia knowledge contents and service strategy.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10c
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• pp.280-283
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• 2007

현재 우리나라는 이동통신 무선망 개방, 지상파 및 위성 DMB 서비스 개시 등으로 인하여 모바일 컨텐츠 시장이 본격적으로 성장하고 있으며, 그에 따른 모바일 게임시장도 크게 형성되고 있다[1]. 하지만 모바일 회사 중 몇몇 주요 회사를 제외하고는 그 경쟁이 매우 치열한 상태이다. 우리가 생각하는 모바일 게임의 성공요인은 조작 용이, 짧은 길이, 신선함 다양성, 유인 용이, 일상생활등과 연관성 등이다. 성공요인을 갖추었음에도 불구하고 이용자들이 넓게 눈을 돌리지를 못하고 있다. 그래서 우리는 이용자들에게 아주 친숙하면서도 사용에 용이를 둔 모바일 타자게임을 제작하게 되었다. 물론 기존의 타자게임과는 다른 요소들을 집어넣어서 이용자들에게 흥미와 신선함으로 다가갔다. 그리하여 모바일 게임 영역에서 일정한 기여를 할 수 있기를 기대하고 있다. 나이가 많은 이용자들을 위하여 문자의 친숙함, 익숙함을 제공하여 주는 기능도 구현하였다.

• Journal of the Korean Society for Library and Information Science
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• v.36 no.2
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• pp.5-24
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• 2002

The purpose of this study is to describe the information environment of ST information users in Korea by examining their needs and satisfaction for documents. Comparison was made between the statistics of KISTI DDS and NACSIS-ILL document copy service, and data from the survey conducted for KISTI's ST information users in 2001 were analyzed. Findings include the low demand for documents delivery, low success rate in obtaining documents from domestic institutions, including KISTI, relatively high reliance on foreign DDS institutions, and difficulties in getting documents with speed, timeliness, and cost-effectiveness. It seems urgent to implement the strategic plans for more comprehensive and well-organized collection development and resource-sharing, and improvement of DDS.

• Korean Journal of Environment and Ecology
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• v.28 no.2
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• pp.247-252
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• 2014

This study was conducted to provide information which will be useful for managing the forest trails effectively. To investigate users' attitudes toward the forest trail construction and use, a questionnaire survey was employed in the Jirisan Dulegil. As the results, most of the respondents perceived that the Jirisan Dulegil have positive impact economically and socio-culturally on community growth. Contrastively, a negative perception existed in the environmental aspect. The users' satisfaction level regarding the Jirisan Dulegil appear to be positive. Users' satisfaction level regarding use services provided in community boundary was evaluated relatively lower. In this point of view, trail use service system provided in the community should be reconsidered for effective forest trail management.

• Journal of Korean Society of Transportation
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• v.22 no.5
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• pp.35-45
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• 2004

This paper analyzes the differences in the service quality priorities of air cargo service providers and customers. After having identified what constitutes the decisive factors with regards to air cargo service quslity, research was carried out to evaluate the differences in the service quality priorities of air cargo service providers and customers. Moreover, this paper analyzes these differences by separating air cargo service providers into Korean and international air cargo service providers. In order to attain the objectives of this research, the air cargo service sectors were divided into three general categories: supply capability(H/W), service accountability, and competitiveness of service fees and management capability(S/W). The researchers then placed 6 different criteria into each service category, for a total of 18. The evaluation of the service quality priorities of air cargo service providers and customers revealed very little difference between these two groups. With regards to the service criteria found in each service category, our research found marked differences between the service quality priorities of providers and customers in only three of the 18 criteria. However, we found marked differences in service quality priorities in 7 of the 18 criteria when the air cargo service providers were divided into Korean and international air cargo providers. While domestic air cargo service providers evaluated management's capability to handle cargo accidents and incidents as the most important priority, international air cargo service providers placed the highest priority on the cargo rate system. The results of this research imply that in order to properly evaluate the differences between the service quality priorities of air cargo service providers and customers, the air cargo service providers itself should be separated between the Korean air cargo service providers and the foreign providers because of their respective inherent perception on service quality.

• Journal of Korean Society of Transportation
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• v.30 no.1
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• pp.149-159
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• 2012

The evaluation of public transit service quality is more complicated than evaluating other aspects of transportation service. Although various measures of effectiveness [MOEs] for transit service have been studied and applied, a more comprehensive and accurate MOE is still required. In the past, either data from user surveys or the experience of bus agency administrators and/or engineers used to measure the quality of service. However, recently, with reliable and accurate real time data from BMS(Bus Management System) and BIS(Bus Information System), more reliable and accurate MOEs are available. This study develops a service evaluation model from users' perspectives, which is based on user' cost models that consider passenger access time, riding time, waiting time, and discomfort due to in-vehicle overcrowding, violation of traffic laws, and accident rate. For validating proposed model, data from the BMS and transit-fare cards (T-Money Card) for Seoul's No. 472 main bus line were used. Models developed in this study provided reliable results.

• Korean Security Journal
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• no.16
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• pp.47-64
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• 2008

The purpose of this study is to develop the measurement of security needs satisfaction from users of electronic security system, to verify its validity and reliability, and by applying them, to examine the effects between the communities using this system. In 2008, the users of electronic security system in big cities in Seoul(Yong-San, Jong-Lo) and Gyung-Gi Do(Su-Won) for their convenience stores, jewelry shops, communication services, banks, government and public offices, etc. were arranged for a population and 262 of them were used for the final analysis by purposive sampling. This study yields following results. First, the validity of security need satisfaction from users of electronic security system is very high, which means the explanatory adequacy of environmental security need is the highest. Second, the reliability of security need satisfaction from users of electronic security system is very high, in which the reliability value(Cronbach's $\alpha$) of internal consistency is over .765. Third, the security need of electronic security system has the most effects on the group of bank workers. That is, through a close cooperative system between the bank and the service of electronic security system, the more keeping satisfied the environmental, bodily, physical security needs are, the less the in security of this group has. Informational security need has the most effects on convenient store group. It means the service companies of electronic security system offer more services at dawn time and make or supply all sorts of visual information system, which reduces insecurity of the convenient store group.