• The Journal of Information Technology and Database
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• v.4 no.1
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• pp.129-138
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• 1997

In today's competitive environment, Information Technology is a resource of primary importance to most organizations. This paper compares Korea's IT maturity levels with respect to those of other major nations. For this research, we used an empirical approach, based on experts surveys. IT classification framework proposed by ETRI is adopted to organize the responses. The results of this study can be used for strategic IT planning by the government.

• Journal of Korea Society of Digital Industry and Information Management
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• v.8 no.1
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• pp.207-220
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• 2012

The goal of the information system in tourism, like that of general information systems, is to create users' information needs so that the users continuously revisit the information system and retrieve the information on a regular basis. However, unlike any other information systems, the primary objective of the tourism information system is to attract tourists to the tourist sites rather than to create the users' needs for their future revisits to the information system. The tourism information system is therefore more closely related to tourists' overall tourism destination image towards the tourism destination. In this respect, the evaluation of the tourism information system should be based on tourists' overall tourism destination image towards the sites. This study examines how tourists' overall tourism destination image towards the sites affect the evaluation of the tourism information system. Specifically, I employ the tourism information system provided by Sokcho and Delone and Mclean(2003)'s the Information System Success Model in order to investigate this research question.

• Journal of the Korean Society for information Management
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• v.27 no.3
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• pp.125-146
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• 2010

This study developed a name access point control system for better performance of information retrieval from institutional repositories, which are equipped with authorgenerated metadata processes for self-archiving. In developing name access point control data for the system, the primary data were created from the existing authority. However, unlike the existing authority data, the primary data did not use any authority forms. Instead, the data utilized all the forms provided by the resources as access points. Specifically, field of activity(subject) and title information on authorship were used to distinguish between persons who have the same name. The result showed that the system improved the performance of the information retrieval. The system has been also expected to be utilized over other metadata provided by libraries, in addition to the institutional repositories, in order to provide better quality information.

• The Journal of Korean Association of Computer Education
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• v.10 no.1
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• pp.9-19
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• 2007

Recently, since the importance of the information communication ethics education for primary and secondary schools has being highlighted, researches and new instructional materials have been published actively. On the other hand, with the advance of e-learning, the various kinds of educational methods which consider the characteristics and the requirement of students are being developed. The educational method for Information Communication Ethics education is no exception. If the practical method for Information Communication Ethics education which considers students' requirements is developed, then a better educational effect can be acquired. In this paper, we decompose instructional design features into 4 components such as goal, model, contents, and media in order to design a better instruction for Information Communication Ethics education. And then, we analyze the relative importance of the instructional design components by using Conjoint method based on our questionnaire result. Finally, we propose an instructional design method for Information Communication Ethics as well as examine the differences among the instructional design components.

• Journal of the Korea Society of Computer and Information
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• v.14 no.5
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• pp.85-91
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• 2009

The centralized conference architecture has a restriction in scalability due to the performance reduction as the number of conference participants increases. To solve this problem several distributed conference architectures have been studied recently. In these architectures new conference servers are added dynamically to the conference environment. In this paper, We have proposed a new conference information data model which can be used in these distributed conference architectures. In our newly proposed conference information data model. several components has been added for exchanging conference information between primary conference server and multiple secondary conference servers. We also proposed a procedure of conference information exchange between these conference servers. And the management of conference informations and SIP(Session Initiation Protocol) notifications to the total conference participants can be processed distributedly with these conference servers, therefore the load to the primary conference server can be decreased by using this method. The performance of our proposed model has been evaluated by experiments.

• The Journal of Information Technology and Database
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• v.7 no.1
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• pp.55-65
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• 2000

Information semantics is a well-known issue in areas of information systems researches. It describes what data mean, how they are created, where they can be applied to ; thus, it provides indispensable information for management of data. This article proposes to formalize information semantics by the processes that data are created or transformed. A scheme is proposed to describe an information production structure, which is called an information structure graph. An information structure graph is a directed graph, whose leaves are primary input data objects and whose root and internal nodes are output objects. Information semantics is derived from an information structure graph that has data as its root. For this, rules are proposed to manipulate and compare graphs. The structural relationships among information structure graphs are mapped into semantic relationships among data.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.4A
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• pp.356-368
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• 2011

While most of the public radio spectrum bands are allocated to licensed users, cognitive radio has been considered as a promising technology for the efficient spectrum utilization. In this new technology, secondary users opportunistically use the temporally underutilized licensed bands as long as they do not give the harmful interference to primary users. In this paper, we focus on the infra-structured network condition in which the cognitive radio network consists of a cognitive radio base station and multiple secondary users. Upon detecting a primary user, the entire cognitive radio network generally switches to another available channel, even if most of the on-going communications still does not interfere with the primary user. Moreover, the network re-entry process on a new channel causes the service disruption of the on-going communications. For this reason, in this paper, we propose a relaying scheme for efficient frequency usage, in which the secondary user out of the interference range of a primary user performs as a relaying node for the secondary user possibly interfering with a primary user. The entire spectrum switching is not required, and thus, we can avoid the service disruption of the on-going communications as much as possible.

• Investigative Magnetic Resonance Imaging
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• v.11 no.2
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• pp.110-118
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• 2007

Purpose: The objective of this work to construct eigenvalue maps that have information of magnitude of three primary diffusion directions using diffusion tensor images. Materials and Methods: To construct eigenvalue maps, we used a 3.0T MRI scanner. We also compared the Moore-Penrose pseudo-inverse matrix method and the SVD (single value decomposition) method to calculate magnitude of three primary diffusion directions. Eigenvalue maps were constructed by calculating of magnitude of three primary diffusion directions. We did investigate the relationship between eigenvalue maps and fractional anisotropy map. Results: Using Diffusion Tensor Images by diffusion tensor imaging sequence, we did construct eigenvalue maps of three primary diffusion directions. Comparison between eigenvalue maps and Fractional Anisotropy map shows what is difference of Fractional Anisotropy value in brain anatomy. Furthermore, through the simulation of variable eigenvalues, we confirmed changes of Fractional Anisotropy values by variable eigenvalues. And Fractional anisotropy was not determined by magnitude of each primary diffusion direction, but it was determined by combination of each primary diffusion direction. Conclusion: By construction of eigenvalue maps, we can confirm what is the reason of fractional anisotropy variation by measurement the magnitude of three primary diffusion directions on lesion of brain white matter, using eigenvalue maps and fractional anisotropy map.

• Journal of the Korean Orthopaedic Association
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• v.56 no.3
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• pp.253-260
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• 2021

Purpose: The least constrained prosthesis is generally recommended in primary total knee arthroplasty (TKA). Nevertheless, a varus/valgus constrained (VVC) prosthesis should be implanted when a semi-constrained prosthesis is not good for adequate stability, especially in the coronal plane. In domestic situations, however, the VVC prosthesis could not always be prepared for every primary TKA case. Therefore, it is sometimes impractical to use a VVC prosthesis for unsual unstable situations. This study provides information for preparing VVC prostheses in the preoperative planning of primary TKA through an analysis of primary VVC TKA cases. Materials and Methods: This study reviewed 1,797 primary TKAs, performed between May 2003 and February 2016. The reasons for requiring VVC prosthesis and the preoperative conditions in 29 TKAs that underwent primary TKA with a VVC prosthesis were analyzed retrospectively. Results: In primary TKA, 29 cases (1.6%) in 27 patients (6 male and 21 female) used VVC prosthesis. Two patients underwent a VVC prosthesis on both knees. The mean age of the patients was 63.4 years old (34-79 years). The mean flexion contracture was 16.2° (-20°-90°), and the mean angle of great flexion was 111.7° (35°-145°). The situations requiring a VVC prosthesis were severe valgus deformity in 10 knees, knee stiffness requiring extensive soft tissue release in 10 knees, previously injured collateral ligaments in five knees, and distal femoral bone defect due to avascular necrosis in four knees. The mean tibiofemoral angle was 25.7° (21°-43°) in 10 cases with a valgus deformity. The mean flexion contracture was 37.5° (20°-90°), and the mean range of motion was 48.5° (10°-70°) in 10 cases with knee stiffness. Conclusion: The preparation of VVC prosthesis is recommended, even for primary TKA in cases of severe valgus deformity (tibiofemoral angle>20°), stiff knee (the range of motion: less than 70° with more than 20° flexion contracture), and the cases with a previous collateral ligament injury. This information will help in the preparation of adequate TKA prostheses for unusual unstable situations.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2003.11a
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• pp.49-71
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• 2003

Due to rapid development of internet, it is easy to use extensive information networks of all over the world. Also development of information technology made all entities share information. Before internet websites were only used to give informations. If primary functions of research center's website are composed of supply of research data, exchange of information, and management of information, it is essential that efficient evaluation and reliable evaluation standards should be set up. This study's purposes are as follows. First, this investigates current status of RRC(Regional Research Center)'s websites. And deducted evaluation models, which can be applied to RRC based on literature study. By using the evaluation models, conducted evalution of websites both from internet users view and from outside experts view, and compared the two groups test results. Second, this study provides current problems of RRC's websites by analyzing the test results. Third, this study presents problems of RRC's websites management of primary funtions and management plans of RRC's websites.