• Journal of the Korean Society for information Management
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• v.21 no.3
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• pp.1-14
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• 2004

Visualization of documents will help users when they do search similar documents. and all research in information retrieval addresses itself to the problem of a user with an information need facing a data source containing an acceptable solution to that need. In various contexts. adequate solutions to this problem have included alphabetized cubbyholes housing papyrus rolls. microfilm registers. card catalogs and inverted files coded onto discs. Many information retrieval systems rely on the use of a document surrogate. Though they might be surprise to discover it. nearly every information seeker uses an array of document surrogates. Summaries. tables of contents. abstracts. reviews, and MARC recordsthese are all document surrogates. That is, they stand infor a document allowing a user to make some decision regarding it. whether to retrieve a book from the stacks, whether to read an entire article, etc. In this paper another type of document surrogate is investigated using a grouping method of term list. lising Multidimensional Scaling Method (MDS) those surrogates are visualized on two-dimensional graph. The distances between dots on the two-dimensional graph can be represented as the similarity of the documents. More close the distance. more similar the documents.

• Journal of Internet Computing and Services
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• v.2 no.2
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• pp.71-93
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• 2001

Commonly to design a database system. a conceptual database has to be designed and then it is transformed into a logical database schema prior to building a target database system. This paper proposes a method which transforms a Temporal Entity-Relationship Model(TERM) into a Temporal Object-Oriented Model(TOOM) to build an efficient database schema. I formalize the time concept in view of object versioning and specify the constraints required during transformation procedure. The proposed transformation method contributes to getting the logical temporal data from the conceptual temporal events Without any loss of semantics, Compared to other approaches of supporting various properties, this approach is more general and efficient because it is the semantically seamless transformation method by using the orthogonality of types of objects, semantics of relationships and constraints over roles.

• The Transactions of the Korea Information Processing Society
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• v.2 no.4
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• pp.443-452
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• 1995

Object-oriented database systems have been proposed as an effective solution for providing the data management facilities of complex applications. Proving this claim and the investigation of related issues such as query processing have been hampered by the absence of a formal object-oriented query model. In this paper, we not only define a query model based on aggregation inheritance but also develop semantic rewriting rules which are applied to equivalence preserving rewrite rules in algebraic expression of a query. Analyzing semantically the query model, the query model can be optimized to logically object-oriented query processing. And algebra expresstions of a query can be optimized by applying equivalence preserving rewrite rules.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.11
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• pp.5124-5129
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• 2012

For achieving team performance, organizations should consider member's competency and their collective competency simultaneously. The principal aim of this research is to examine relationships among collective competency, group cohesiveness, team performance. 438 employees composing 52 teams participated in this empirical study. Results show that the mean of member competency was not associated with team performance. Results also show that there was no effect of group cohesiveness on team performance. However, consistent expectation, the interactive effect of collective competency and group cohesiveness on team performance was significant. Implications for future research are also discussed.

• Journal of Korean Library and Information Science Society
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• v.34 no.2
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• pp.233-253
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• 2003

Knowledge organization is the way we humans understand the world. There are two types of information organization mechanisms studied in information retrieval: namely classification md clustering. Classification organizes entities by pigeonholing them into predefined categories, whereas clustering organizes information by grouping similar or related entities together. The system of the Internet information resources extracts a keyword from the words which appear in the web document and draws up a reverse file. Term clustering based on grouping related terms, however, did not prove overly successful and was mostly abandoned in cases of documents used different languages each other or door-way-pages composed of only an anchor text. This study examines infometric analysis and clustering possibility of web documents based on co-link topology of web pages.

• The Journal of the Acoustical Society of Korea
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• v.10 no.1
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• pp.52-60
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• 1991

This paper describes the study on isolated word recognition by using DHMM(Dynamic Hidden Markov Model) which has dynamic feature of spectrum as a parameter. This paper discusses speech recognition experiment basedon HMM which can evaluate not only instantaneous spectral features but also dynamic spectral features. LPC cepstrum parameters is used as a static feature and LPC cepstrum's regression coefficient is used as a dynamic feature. These two features are quantized by each VQ codebook. DHMM is modeled by receiving static vector and dynamic vector by input. In the whole experiment, as recognition experiment using DHMM shows 92.7% of recognition rate while the experiment using conventional HMM shows 88.8% of recognition rate, DHMM proved to be a useful model.

• Journal of Global Scholars of Marketing Science
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• v.3
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• pp.215-234
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• 1999

본 연구의 목적은 IMF의 어려운 경제환경하에서 과거와는 달리 기업이 생존 및 번영을 위해서는 어떤 신제품개발 전략을 세우고 그 전략은 기업의 신제품 성과에 어떤 영향을 미치는지를 알아보기 위함이다. 이를 위한 연구 질문으로 기업은 신제품개발을 위한 상이한 경영전략을 사용하는가 ? 그리고 신제품개발 전략은 신제품개발 성과에 영향을 미치는가를 파악하고자 하였다. 본 연구는 신제품개발 전략유형 즉 신제품 특성, 시장특성, 기술특성 그리고 프로그램 특성의 4가지 유형에 의해 실증분석을 한 결과 균형전략, 다각화전략 그리고 시너지추구 전략군 등 3가지 유형으로 집단화할 수 있었다. 균형전략군은 기술지향성과 마케팅지향성을 동시에 보유하고 있는 전략군이고, 다각화전략군은 새로운 고객의 욕구충족을 위해 새로운 유통경로와 촉진활동을 촉진하는 전략군이며 마지막으로 시너지추구 전략군은 상대적으로 낮은 R&D비용을 지출하고 위험성이 낮고 기술수준이 낮은 신제품을 개발하는 전략유형이다. 그리고 신제품전략 유형에 따라서 신제품개발 성과에 가장 많은 영향을 미치는 것은 제품특성(3.4524)이고 그 다음으로 시장특성(3.4470), 기술특성(3.4270) 순으로 나타났다. 따라서 위의 분석 결과들은 IMF시대의 불확실한 경영환경에 대처하면서 기업의 생존 및 번영을 책임지고 있는 신제품개발 담당자들에게 경영적 함의를 제시할 것이다.

• Journal of the Institute of Convergence Signal Processing
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• v.2 no.4
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• pp.97-102
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• 2001

In computer-aided design, partitioning is task of clustering objects into groups to that a given objection function is optimized It is used at the layout level to fin strongly connected components that can be placed together in order to minimize the layout area and propagation delay. Partitioning can also be used to cluster variables and operation into groups for scheduling and unit selection in high-level synthesis. The most popular algorithms partitioning include the Kernighan-Lin algorithm Fiduccia-Mattheyses heuristic and simulated annealing In this paper we propose a genetic algorithm searching solution space for the circuit partitioning problem. and then compare it with simulated annealing by analyzing the results of implementation.

• Journal of Korean Society of Rural Planning
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• v.2 no.2
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• pp.81-90
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• 1996

In this paper, the basic planning for the creation of consolidated agricultural institutions of Choongcheongnam -Do and its management schemes were established. These institutions, including rural development office, farmers'training institution, original seeding field of farm crops, agriculturial information center, packing design center, agricultural machinery repair center, agricultural scientific conference hall, agricultural museum, agricultural park, farmers'hall and event plaza, are planned to be created. The required area for the site is 1,246,781 m2. 281-22 Jongkyung-Ri, Sinam-Myun, Yesan-Gun, Choongcheongnam-Do and its surroundings is a proper site for the creation of'consolidated agricultural institution because the actual conditions of the soil, traffic network, irrigation and drainage, tourist routes and human resources are very good. The layout of the facilities that would comprise an agricultural institution was organized in consideration of the functions and roles of each facility and the relationships among facilities in this consolidated agricultural institution. It is desirable that the headquaters of consolidated agricultural institution oversees the management department, the planning $.$ administration $.$ information department, the rural development office, the farmers'training institution, the original seeding field of farm crops and the agricultural park.

• Journal of Korean Society of Water and Wastewater
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• v.27 no.5
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• pp.661-669
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• 2013

River-water quality has been greatly improved during past several decades with the extraordinary expansion for the wastewater treatment capacities by the government. Research aims to select the priority restoration streams based on the chronicle data for tributaries in Geumgang watershed as the main stream area in the Chungchungnamdo province. The quality of BOD, phosphorus and percent of sewered population on 15 branch streams were compared by the grouping methods. The results of group D streams by category I that exceed 3.0 mg/L for BOD and 0.1 mg/L for phosphorus were Seuksung, Ganggyung and Bangchuk stream. The results of group D streams by category II that exceed 3.0 mg/L for BOD and less than 63.5 % of average percent of sewered population were Ganggyung, Gilsan, Bangchuk and Seuksung stream. The final results of selected streams drawn by the chronicle data which exceeded the standard quality and lower than the average percent of sewered population were Seoksung, Gangeyung and Bangchuk stream. The pollution of rivers in the down streams were more serious than in the upper streams. Their watersheds have to be improved river water quality, especially to extend sewer systems as well as wastewater treatment facilities.