• Journal of Korea Multimedia Society
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• v.6 no.5
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• pp.909-920
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• 2003

Nowadays, IT for CRM has been growing and developed rapidly. Typical techniques are statistical analysis tools, on-line multidimensional analytical processing (OLAP) tools, and data mining algorithms (such neural networks, decision trees, and association rules). Among customer data, web log data is very important and to use these data efficiently, applying OLAP technology to analyze multi-dimensionally. To make OLAP cube, we have to precalculate multidimensional summary results in order to get fast response. But as the number of dimensions and sparse cells increases, data explosion occurs seriously and the performance of OLAP decreases. In this paper, we presented why the web log data sparsity occurs and then what kinds of sparsity patterns generate in the two and t.he three dimensions for OLAP. Based on this research, we set up the multidimensional data models and query models for benchmark with each sparsity patterns. Finally, we evaluated the performance of three OLAP systems (MS SQL 2000 Analysis Service, Oracle Express and C-MOLAP).

• Journal of Korea Society of Industrial Information Systems
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• v.7 no.5
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• pp.39-48
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• 2002

long with the rapid spread of the Internet, a new class of commercial applications which process transactions with respect to electronic dictionaries become popular Typical examples are Internet search engines. In this paper, we present a new approach to achieving high performance electronic dictionaries. Different from the conventional approach which use Trie data structures for the implementation of electronic dictionaries, our approach used multi-dimensional binary trees. In this paper, we present the implementation of our electronic dictionary ED-MBT(Electronic Dictionary based on Multidimensional Binary Tree). Exhaustive performance study is also presented to assess the performance impact of ED-MBT on the real world applications.

• Korean Journal of Psychosomatic Medicine
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• v.15 no.2
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• pp.65-72
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• 2007

Fatigue is a significant problem in health care. The relationship between chronic fatigue and psychiatric disorders has generated significant interest in recent years. Increased rates of psychiatric disorder among individuals with chronic fatigue have been reported. Fatigue may be defined as physical and/or mental weariness resulting from exertion. The cause of fatigue is complex, influenced by events occurring in both the periphery and the central nervous system. Because fatigue may result from a number of causes, it should be treated comprehensively. The treatment is largely symptomatic and rehabilitative.

• Communications for Statistical Applications and Methods
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• v.18 no.2
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• pp.171-177
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• 2011

In order to construct approximation functions for real data, it is necessary to remove the outliers from the measured raw data before constructing the model. Conventionally, visualization and maximum residual error have been used for outlier detection, but they often fail to detect outliers for nonlinear functions with multidimensional input. Although the standard support vector regression based outlier detection methods for nonlinear function with multidimensional input have achieved good performance, they have practical issues in computational cost and parameter adjustments. In this paper we propose a practical approach to outlier detection using support vector regression that reduces computational time and defines outlier threshold suitably. We apply this approach to real data examples for validity.

• Journal of Korea Spatial Information System Society
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• v.7 no.3 s.15
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• pp.55-65
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• 2005

This paper presents a bulk insertion technique for efficiently inserting data items. Traditional moving object database focused on efficient query processing that happens mainly after index building. Traditional index structures rarely considered disk I/O overhead for index rebuilding by inserting data items. This paper, to solve this problem, describes a new bulk insertion technique which efficiently induces the current positions of moving objects and reduces update cost greatly. This technique uses buffering technique for bulk insertion in spatial index structures such as R-tree. To analyze split or merge node, we add a secondary index for information management on leaf node of primary index. And operations are classified to reduce unnecessary insertion and deletion. This technique decides processing order of moving objects, which minimize split and merge cost as a result of update operations. Experimental results show that this technique reduces insertion cost as compared with existing insertion techniques.

• Proceedings of the Korea Association of Information Systems Conference
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• 2000.11a
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• pp.6-11
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• 2000

수출입 관련 항만물류업무 처리의 효율화를 위해 1996년부터 도입된 EDI는 서류없이 각종 항만물류 및 통관업무를 효율적으로 처리하는데 큰 기여를 하고 있다. 그러나 기존의 방식은 VAN EDI 로써 폐쇄적인 VAN 망을 통하여 EDI VAN사업자가 사용자의 EDI문서를 관련 정부기관에 중계만을 하여 EDI문서에 나타난 각종 데이터의 누적을 통한 물류정보서비스는 제공되고 있지 않다. 한편, EDI를 수신한 각 정부기관에서는 필요한 물류요약정보를 얻기 위해 해당 EDI 문서에서 추출한 데이터를 저장하는 운영 데이터베이스에 접근하여 필요한 요약 정보를 리포트 형태로 프로그램하여 생성하고 있어 정보제공의 시간지연과 프로그램 업무의 과중 및 운영 데이터베이스에 대한 부하가 발생하고 있다. 본 논문의 목적은 이러한 상황에서 수출입 항만물류와 관련한 다차원 정보를 실시간제공하기 위한 데이터웨어하우스를 구축하는데 있다. 일반적으로 데이터웨어하우스는 운영데이터베이스로부터 다차원 구조의 데이터웨어하우스로 데이터를 추출, 전환, 복사함으로써 이루어지지만, 본 연구에서는 EDI 수신 기관의 운영데이터베이스보다 더 원천 데이터인EDI 문서로부터 데이터웨어하우스로 데이터 변환을 함으로써 항만물류 데이터웨어하우스의 데이터 추출 단계를 한 단계 줄였다. 현재 VAN EDI 방식은 그 폐쇄성과 비용 때문에 향후 인터넷을 이용한 XML/EDI로 기술 이전될 것이 예상되며 이러한 상황에서VAN EDI 포맷이 아닌 XML/EDI 문서로 부터 데이터웨어하우스로의 전환을 구현하였다. 본 연구에서는 관세청의 수출통관 EDI에 대해 이를 XML/EDI 로 XML 스키마를 정의하고 이로 생성된 XML 문서를 SQL 서버로 구현된 OLAP 용 데이터웨어하우스로 전환하였다. 본 연구를 통해 XML을 이용한 EDI체제에서 전자문서전송기능과 정보제공기능을 위한 데이터웨어하우스의 연동을 동해 EDI시스템을 다차원 의사결정정보 시스템과 통합하게 하여, 향후 인터넷 기반 XML/EDI 중계서비스에 있어 물류정보서비스도 원활하게 제공할 수 있게될 것으로 기대된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.382-390
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• 2017

This study was conducted to identify the factors affecting the quality of life of cancer patients based on demographic characteristics, health status, and mental health using the results of the 6th National Health and Nutrition Survey. The research tool used the demographic characteristics, health status, mental health, and quality of life of the KNHANES VI-2. Data analysis was conducted using SAS 9.3 version. There were significant differences in the quality of life in the study results by age, gender, economic activity, individual income quartile, subjective health status, mental health status, activity limitation, stress perception, and experience of depression symptoms. Factors influencing the quality of life of cancer patients included age, sex, income quintiles(individual), subjective health status, activity limitation, and experience of depression symptoms, which together explained 39.1% of the quality of life. To improve the quality of life of cancer patients, comprehensive management is required from diagnosis to treatment to return to society. It is also necessary to develop and apply long-term programs including multidimensional approaches and improvement of quality of life, early screening of cancer and cancer prevention education, management of depression symptoms, and social support.

• 한국노년학
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• v.39 no.1
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• pp.93-108
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• 2019

The purpose of this study is to examine the effect of absolute / relative poverty on the life satisfaction focusing on mediation effect of subjective social status by type of elderly residents. In order to analyze the distinct characteristics of the elderly, analysis was conducted with 3,327 the elderly living together and 668 the elderly living alone using 'Korean Longitudinal Study of Ageing(KLoSA)' from 3rd to 5th wave data provided by the Korea Employment Information Service. The main analysis results are as follows. First, each poverty rate for the elderly living together accounted for 43.5 percent and 51.4 percent, while 63.8 percent and 77.2 percent for the elderly living alone respectively. Second, life satisfaction was higher among the elderly living together than living alone, However, life satisfaction was not related to condition of poverty among the elderly living alone. Third, absolute / relative poverty were associated with life satisfaction of the elderly living together, and subjective social status had a mediating effect. However, relative poverty was not related to life satisfaction among the elderly living alone, which indicated that it needs to support not only the financial approach to overcome absolute poverty but also the multi-dimensional poverty perspective in the intervention of the elderly living alone Based on the results, the study suggested to make a tool to measure of poverty using multi-dimensional poverty indicators.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2009.11a
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• pp.175-178
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• 2009

본 연구는 감성공학적 접근법으로 터치 모바일 폰의 자유 드로잉 GUI 요소를 디자인 하기 위한 프로세스를 검증하는 것이 목적이다. 본 연구의 프로세스는 다음과 같이 진행되었다. 첫째, 터치폰에서 자유드로잉하는 행태를 파악하기 위하여 남 녀 대학생 57 명을 대상으로 터치폰 일기를 쓰게 하여 분석하였다. 또한 관찰 대상자가 선호하는 패션, 좋아하는 이미지를 수집하여, IRI 표준 이미지 스케일 맵에 매핑하여 감성 요소를 추출하였다. 둘째, 추출된 감성 요소는 Norman(2002)에 의거한 감각적(Visceral), 행태적(Behavioral), 심볼적(Reflective) 감성 어휘로 도출하고, 요인 분석을 통해 대표 감성 어휘를 도출하였다. 셋째, 자유 드로잉을 위한 터치 모바일폰 GUI 요소를 도출한 후 대표 감성 어휘와의 관계성을 분석하여 관계성이 높은 디자인 요소를 추출하였다. 마지막으로 추출된 대표 디자인 요소와 대표 감성 어휘는 다차원척도(Multidimensional scaling : MDS) 분석을 실시하여 2 차원 축에 모델링하고, 정량적으로 디자인에 반영될 주요 감성을 도출해본 결과 사용자의 감성적 경험을 통해 도출된 GUI 와 유사성이 높은 감성 어휘는 감성적 디자인을 할 때 주 요소로 적용 된다는 사실을 확인하였다.

• Journal of the Korean Society of Costume
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• v.59 no.5
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• pp.167-179
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• 2009

The purposes of this study were to explore the influence on fashion brand image and brand loyalty according to fit of the fashion brand with cultural art field, motivation in culture marketing of the apparel company, and involvement of the consumers in art activities. The subjects ware 274 male and female in 20s and 30s living in Seoul and Gyeonggi area. The study was obtained through the use of an experimental design which was $2{\times}[2{\times}2]$ mixed factorial design. The summary main results were as follows. First, as far as the effect of the three variables on the social contribution image of the fashion brand, the results of the 3-way interaction are positive. Second, as far as the effect of the three variables on the product image of the fashion brand, the data suggests that only the main-effect of motivation in culture marketing of the apparel company is meaningfully positive. Third, as far as the effect of the three variables on fashion brand loyalty, both fit of the fashion brand with cultural art field and involvement of the consumers in art activities variables show positive results.