• Journal of the Korean Data and Information Science Society
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• 제19권3호
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• pp.819-830
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• 2008

Web recommender system was suggested in order to solve the problem which is cause by overflow of information. Collaborative filtering is the technique which predicts and recommends the suitable goods to the user with collection of preference information based on the history which user was interested in. However, there is a difficulty of recommendation by lack of information of goods which have less popularity. In this paper, it has been researched the way to select the sparsity of goods and the preference in order to solve the problem of recommender system's sparsity which is occurred by lack of information, as well as it has been described the solution which develops the quality of recommender system by selection of customers who were interested in.

• ETRI Journal
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• 제30권6호
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• pp.799-806
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• 2008

In this paper, a new design for an error correcting code (ECC) is proposed. The design is aimed to build an ECC circuitry with minimal power consumption. The genetic algorithm equipped with the symbiotic mechanism is used to design a power-efficient ECC which provides single-error correction and double-error detection (SEC-DED). We formulate the selection of the parity check matrix into a collection of individual and specialized optimization problems and propose a symbiotic evolution method to search for an ECC with minimal power consumption. Finally, we conduct simulations to demonstrate the effectiveness of the proposed method.

• 한국문헌정보학회지
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• 제9권
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• pp.99-118
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• 1982

This paper first reviews various techniques proposed for automatic indexing with special emphasis placed on statistical techniques. Frequency-based statistical techniques are categorized into the following three approaches for further investigation on the basis of index term selection criteria: term frequency approach, document frequency approach, and probabilistic approach. In the experimental part of this study, Pao's technique based on the Goffman's transition region formula and Harter's 2-Poisson distribution model with a measure of the potential effectiveness of index term were tested. Experimental document collection consists of 30 agriculture-related documents written in Korean. Pao's technique did not yield good result presumably due to the difference in word usage between Korean and English. However, Harter's model holds some promise for Korean document indexing because the evaluation result from this experiment was similar to that of the Harter's.

• Asia pacific journal of information systems
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• 제4권2호
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• pp.3-34
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• 1994

In this paper we describe a new data modeling language we call $O^{2}LDM$. $O^{2}LDM$ incorporates features from object-oriented and logic approaches. In $O^{2}LDM$ there is a rich collection of objects organized in a type hierarchy. It is possible to compose queries that involve field selection, function application and other constructs which transcend the usual, strictly syntactic, matching of PROLOG. We give the features of $O^{2}LDM$ and motivate its utility for conceptual modeling. We have a prototype implementation for the language, which we have written in ML. In this paper we describe an executable semantics of the deductive process used in the language. We work some examples to illustrate the expressive power of the language, and compare $O^{2}LDM$ to PROLOG.

• 품질경영학회지
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• 제39권3호
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• pp.377-390
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• 2011

A common problem encountered in product or process design is the selection of optimal parameter levels which involves simultaneous consideration of multiple response variables. This is called a multiresponse problem. A multiresponse problem is solved through three major stages: data collection, model building, and optimization. Up to date, various methods have been proposed for the optimization, including the desirability function approach and loss function approach. In this paper, the existing studies in multiresponse optimization are reviewed and a future research direction is then proposed.

• 한국산업융합학회 논문집
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• 제21권3호
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• pp.133-139
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• 2018

Precipitator is the most widespread device used to separate dust particles from the exhaust gas. In the shipyard, welding umbrellas, spark protection covers, and ventilators are not purchased and used for the work place to capture the flames and high temperature metal dust generated during the gardening process. In particular, a thorough analysis of design factors, such as capture rate, collection capacity calculation, filter speed, and materials selection, is required since spatial constraints are followed by structures, etc. In this study, conceived to address problems such as this cyclone and filtration filter system that combines all-in-one gausing collector prototype. Assessed through interpretation through the validity of the design and reliability.

• 한국도서관정보학회지
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• 제25권
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• pp.441-474
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• 1996

Up to recently, information service have emphasized mainly on efficiencies of information collection, storage, process. But, now, many people take interest in criteria and evaluation on quality of information itself and its services because of growth of electronic materials and development of telecommunication. Especially, since the greater part of infomation is made gradually digital format, quality of information service regards as of great importance. This study attempts to investigate the quality problem in information services and its a n.0, pplication. Also, to su n.0, pport high quality, it is needed criteria of information services to evaluate and measure. To understand quality of information services, This articles deal with concept of quality on information related sector, quality management, the reason of importance of information quality, quality work of information services. There is little method to measure and evaluate quality of internet services. So it is necessary to study on internet quality, user's selection on its quality, and development on high quality site.

• 한국도서관정보학회지
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• 제27권
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• pp.423-456
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• 1997

As information technology has been evolving, digital library emerges as a vision of future library. Many authors on digital library describe that the problems that today's libraries face would be completely solved by using digital technology. But it is su n.0, pposed that such technology oriented papers do not take care of what the library has been and should remain. This paper is prepared to identify what core elements of library services being provided in traditional environment must be transferred to the digital library. For this purpose, firstly historical transition from traditional library to digital discussed. Secondly, library's fundamental service functions are analysed from three points of view-library as cultural and social institution, library as intellectual reality, library as a collection. And 'control zone' concept is also investigated as a new possibility of academic digital libraries. In contrast to open zone in which information is not controled at all as in internet, in control zone, information is selected and maintained by academic library community, retaining such essential library functions as selection.

• 한국경영과학회지
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• 제41권3호
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• pp.59-74
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• 2016

Electricity sales are directly measured from individual consumers, which could minimize the time gap between data collection and public announcement. Furthermore, industrial electricity sales are highly linked with production and output. Therefore, industrial electricity consumption can be used to track production and output in real time. By using the high-frequency data of industrial electricity sales, this study develops the daily electricity business index (DEBI) to capture the daily economic status. The steps used to formulate DEBI are as follows: (1)selection of the explanatory variables and period, (2) amendment of the seasonal adjustment to eliminate daily temperature and effective day effects, (3) estimation of the weighted value via variables by using PCA, (4) calculation of DEBI and commencement of validation tests. Our empirical analysis and the Hodrick-Prescott filter analysis show that DEBI is highly related to existing economic indices.

• 한국도서관정보학회지
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• 제30권3호
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• pp.151-174
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• 1999

Recently, the Ministry of Education is striving to move education and school libraries toward the information age and to create an atmosphere open education. School libraries need to be furnished with lots of useful materials for the curriculum of open education. School libraries need to be furnished with lots of useful materials for the curriculum of open education. Therefore, school libraries should adopt the concepts and techniques of marketing. The results of this study can be summarized as follows. 1. Nonprofit organizations such as school libraries should adopt the concepts and techniques of marketing to solve the problems for the rational management of the system. 2. Marketing techniques can be adopted in the areas such as collection development, service fee, selection of the place of library, advertising, better library user organization etc. 3. School libraries should be total educational information centers to realize educational goal and the curricular. 4. Procedures for marketing strategies for school libraries are embodied in mission statement, environmental analysis, marketing audit, marketing mix, marketing segmentation, evaluation methods etc. 5. The 4 "Ps", product, price, place, promotion make up the marketing mix for school libraries.libraries.