• Proceedings of the Korea Contents Association Conference
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• 2006.05a
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• pp.298-301
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• 2006

This study was conducted to observe the changes in trend of a beautiful face defined in different time frames. Affective space model was used in this study, for physical components of a face are far too complicated and undistinguishable from simple categorization of a face by facial characteristics. It is because using a facial model defined only by its physical characteristics renders a complicated and multi-dimensional space, whereas an emotional facial model enables a 2-dimensional space for easier observation and explanation. Scope of the study is focused on faces of the Korean female celebrities, looking at the media frequency, popularity rankings in well-known portal sites, and popularity ratings by reliable search organizations as of 2006. Celebrities in their 20s and early 30s were selected. In addition, to observe any trend in a beautiful face with the passage of time, the study looked at changes or trends in the last 5 years by comparing the faces of celebrities in year 2006 with their faces stored in the database since five years ago.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.283-288
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• 2009

Semantic service can be defined as the service providing search API or reasoning API based on ontology and Web Services. It performs a pre-defined task by exploiting URI, classes, and properties. This study introduces a semantic service composition method based on a semantic broker referring ontology and management information of semantic services stored in a semantic service manager with requirements of the user. The requirements consist of input instances, an output class, a visualization type, semantic service names, and property names. This composition method provides dynamically generated semantic service pipelines including composit semantic services. The user can execute the pipelines provided by the semantic broker to find a meaningful semantic pipeline. After all, this study contributes to develop a system supporting human service planners who want to find composit semantic services among distributed semantic services.

• Information Systems Review
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• v.9 no.3
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• pp.157-181
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• 2007

Main concerns of IT project managements are concentrated on the output control and process management. IT project, however, is difficult to measure the quality of achievement, because it produces invisible and intangible outputs. Many studies have been carried on to quantify the intangible aspects of process management. However, most of them have been focused on the technological aspects. This study measures the priority of factors to manage IT project by applying the IT-BSC and PMBOK method. Established indexes include the factors of managerial, social and future-oriented perspectives to check the different aspects of project management over the technical factors. This study uses AHP method for quantitative measurement. This study can be meaningful because of following reasons. First, this study re-arranges IT project management evaluation indexes by balanced scorecard. Second, this model includes human factors of developers and users who are directly related to the project development and operation. Third, important items of each stakeholder have been separated, and the weights of each item have been quantified to have fixed values.

• Journal of KIISE
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• v.43 no.8
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• pp.927-932
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• 2016

With the explosive increase in the number of online medical documents, the demand for question-answering systems is increasing. Recently, question-answering models based on machine learning have shown high performances in various domains. However, many question-answering models within the medical domain are still based on information retrieval techniques because of sparseness of training data. Based on various information retrieval techniques, we propose an answer snippet retrieval model for question-answering systems of medical documents. The proposed model first searches candidate answer sentences from medical documents using a cluster-based retrieval technique. Then, it generates reliable answer snippets using a re-ranking model of the candidate answer sentences based on various sentence retrieval techniques. In the experiments with BioASQ 4b, the proposed model showed better performances (MAP of 0.0604) than the previous models.

• Journal of Korea Water Resources Association
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• v.37 no.8
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• pp.663-674
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• 2004

In this study, the principle of water allocation is proposed based on efficiency, equity, sustainability. Also weighting factors are estimated with sectoral factors and regional factors. The former represents relative weights among water use and the latter represents physical characteristics of water demand places. The AHP(Analytic Hierarchy Process) is applied to estimate the sectoral factors, and compounded regional-characteristic factors and regional-scale factors, which reflects socioeconomic statistics for the regional factors. By applying these weighting factors, water allocation rules for dam is developed and applied to Andong dam which supplies water to parts of Busan Shi, Daegu Shi and Goryeong Gun in a water-deficit situation. As a result, it is estimated that Water allocation by priorities distributes the entire water shortage to the lowest rank of water sectors or regions, while water allocation by relative weighting factors disperse all the burdens of water shortage to all sectors and regions.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.415-416
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• 2011

As the has been brought out in 1997, many ports pay attention to greenhouse gas emission reduction and try to develop the port as an Green Port. The purpose of this paper is to establish the activities priority for Green Port construction and analysis its efficiency for the port competition. First of all, the activities for Green Port is introduced and showed its characteristics. To analysis these effectiveness for Green Port, the questionnaire survey is done by considering the opinion of port specialists. And by using AHP analysis method, the priority between the port activities is obtained and its effect for Green Port is taken by considering port competitiveness.

• Journal of the Korean Society for Railway
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• v.14 no.4
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• pp.354-363
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• 2011

Existing railway bridges have been going through various improvements since the past, with new improvement plans being formed based on social and technological demands. However, there is the need, above all, for an efficient execution plan due to the great number of sites and excessive amount of required expenses contrary to limited assets. The system itself must be held in question in order to systemize various improvement plans, to define and describe factors while utilizing evaluation methods for significance and correlation to achieve generalization. This paper is focused on determining the priority of various improvement plans through the optimization selection process of mutually evaluating alternative plans under various evaluation standards, thus corresponding to the decision-making purpose. The AHP analysis technique was applied for systemization setting and preference evaluation, while the HPT procedure was applied to develop and select appropriate improvement plan factors.

• Nuclear Engineering and Technology
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• v.5 no.4
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• pp.321-333
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• 1973

The rates and activation parameters for the halide exchange reactions of substituted benzenesulfonylbromides (R-C$_{6}$H$_4$SO$_2$Br, R=p-MeO, p-$CH_3$, p-H, p-NO$_2$) in dry acetone at two temperatures were determined. It was found that the nucleophilicity order of Cl->I-$\geq$Br- for strong electron withdrawing-, and mild electron donating group, and of I-$\geq$Cl->Br- for strong electron donating group, Hammett plots showed slightly convoked characteristics which is similar to the plots of substituted benzenesulfonylchlorides, but contrary to the concaved nature for the halide exchange reactions of substituted benzyl chlorides. The rate of halogen exchange between benzenesulfonylbromide and lithium bromide decreased in the order of solvent : ($CH_3$)$_2$CO>$CH_3$CN》MeOH. The rates and activation parameters were also compared with those already known in the substituted benzenesulfonylchlorides. Theses were explained in terms of the structural properties of the transition state, and discussed the reaction mechanisms.s.

• Journal of Navigation and Port Research
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• v.37 no.4
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• pp.383-390
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• 2013

After forming a institutional framework with specified in Maritime Safety Law(ex. Maritime Traffic Safety Law) on May 27th, 2009, The efforts for improving 'Maritime Traffic Safety Assessment Scheme(MTSA scheme)' have continued to the present. But there's no review with the comprehensive and systematic approach for proceeding acceleration step of MTSA scheme. At this point, this study analyzed current status and derived improvement measures using by 'PIP'OU model' which was designed for the comprehensive analysis in accordance with metaevaluation theory, like as question investigation and etc. Consequently, it mainly needs to improve 'Assessment Plan' domain and minimized the difference in views between concerned parties. This study is expected to be used to develop systematic maritime policy by proposing the order of priority in improvement matters.

• The Korean Journal of Applied Statistics
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• v.26 no.2
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• pp.307-319
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• 2013

With the rapid accumulation of microarray data, it is a significant challenge to integrate available data sets addressing the same biological questions that can provide more samples and better experimental results. Sometimes, different microarray platforms make it difficult to effectively integrate data from several studies and there is no consensus on which method is the best to produce a single and unified data set. Methods using median rank score, quantile discretization and standardization (which directly combine rescaled gene expression values) and meta-analysis (which combine the results of individual studies at the interpretative level) are reviewed. Real data examples downloaded from GEO are used to compare the performance of these methods and to evaluate if the combined data set detects more reliable information from the separated data sets or not.