• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.183-186
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• 2012

To process continuous queries on a sensor network, it is required to transfer query predicates and build a query index on each sensor node. However, if we transfer query predicates to all sensor nodes, it makes the number of messages for query predicates increase. In this paper, we propose the scheme to construct the tree based relationship structure using data region of the sensor node and select the target nodes to transfer query predicates. we also implement the tree based relationship structure and measure the number of messages for sending predicates.

• Journal of Distribution Research
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• v.15 no.2
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• pp.35-70
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• 2010

In this study, we examined distribution channel relationship by using the idea of Cheong, which is a unique feeling an positive role in Korean society. Companies make great efforts to maintain long-term relationship with buyers. Understanding distinctive relationship system of each culture should precede these efforts to bring effective results. So we considered how Cheong, a meaningful factor in Korean distribution channel, affects relationship quality and performance. As a result of research analysis from 272 survey questionnaires of retailers, engaging in Crops Protected Material industry in Korea, supplier's idiosyncratic investment, retailer's Cheong, and dependence of retailers on suppliers have positive effects on relationship quality. Supplier's idiosyncratic investment and cognitive factors have the highest influence and Cheong, an emotional factor, follows. Dependence, a motivational factor has the least influence. We confirmed that retailer's cooperation and long-term orientation are directly influenced by retailer's commitment. Active cooperation of the retailer, a partner of a distribution channel, is regarded as an essential factor for supplier's effective business. Retailer's commitment increased that cooperation. Retailer's trust and commitment also decreased relationship conflicts. The results of this study imply that companies should increase idiosyncratic investment to improve relationship quality. But increasing idiosyncratic investment is limited because it requires monetary investment. Therefore companies need to recognize the importance of Cheong, revealed as a new factor, improving relationship quality and to make the best use of it. In this study, we contributed theoretically by examining the role of Cheong, and introducing its distribution discipline. We also make practical suggestions about supplier's relationship management.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.52-54
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• 2002

인터넷에서 XML은 고유의 확장성과 문서 관계성의 우수성을 활용하여 새로운 정보 공유 환경의 표준으로 자리잡고 있으며 XML문서 안의 정보 검색을 위해서 XPath 질의어가 널리 사용 중이다. 따라서, XML 문서를 데이터베이스에 효율적으로 저장하고 검색하는 연구들이 진행되고 있다. 본 연구는 관계형 데이터베이스(RDBMS)를 통하여 XML문서를 저장하고 검색할 수 있게 하기 위해 XPath 질의어에 적합하도록 하부 저장 스키마를 설계하였다. 그리고, XPath 질의를 SQL문으로 변화시켜 수행함으로써 XML 데이터에 대한 접근을 허용하였다. 더욱이 SQL문 수행 후의 결과를 효율적으로 DOM 형식의 XML 문서를 생성시킴으로써 문서의 재 조작을 가능하게 하였다.

• Annual Conference on Human and Language Technology
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• 2001.10d
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• pp.530-537
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• 2001

본 논문은 자연어 인터페이스에 기반한 관계형 데이터베이스 상에서의 질의 응답 시스템에 대해 기술한다. 본 시스템은 다국어, 다중 도메인, 다중 DBMS를 지원하는 시스템으로, 주로 오디오와 비디오 관련 제품들에 대한 정보를 다룬다. Lexico-semantic pattern (LSP) 문법을 관계형 데이터베이스 상에서의 질의 응답 시스템에 최초로 도입하여 기존의 시스템들에 비해 높은 성능을 보이며, linguistic front-end (LFE)와 database back-end (DBE)를 명확히 구분하고 각종 리소스들을 엔진과 분리함으로써 높은 이식성을 가지도록 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.1829-1832
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• 2003

본 연구는 유의어 매트릭스를 이용하여 질의의 확장을 통한 컴포넌트 검색 과정을 기술하였다. 컴포넌트 검색은 질의를 입력하면 질의의 확장이 이루어지고 컴포넌트 사이의 신뢰도를 측정하여 검색한다. 신뢰도 계산을 위해서는 질의와 컴포넌트 사이에 유사한가를 나타내는 동치관계, 클래스의 가중치와 동치관계 값을 이용한 포함관계, 그리고 유사도를 계산한다. 끝으로 이들 값을 이용하여 신뢰도를 계산한 후 이 신뢰도 값에 의하여 유사 컴포넌트들을 검색하여 유사도 우선순위로 컴포넌트가 검색된다.

• KIISE Transactions on Computing Practices
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• v.21 no.7
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• pp.452-457
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• 2015

In this paper, we propose a spatial query processor, SQUERY, which can derive rich query results through spatial reasoning on the initial knowledge base, as well as, process both qualitative and quantitative queries about the topological and directional relationships between spatial objects. In order to derive richer query results, the query processor expands the knowledge base by applying forward spatial reasoning into the initial knowledge base in a preprocessing step. The proposed query processor uses not only qualitative spatial knowledge describing topological/directional relationship between spatial objects, but also utilizes quantitative spatial knowledge including geometric data of individual spatial objects through geometric computation. The results of an experiment with the OSM(Open Street Map) spatial knowledge base demonstrates the high performance of our spatial query processing system.

• 한국노년학
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• v.30 no.1
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• pp.179-194
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• 2010

The purpose of this study examines the elderly hemodialysis patients' Health-related quality in life(HRQL) and investigates the relationship between HRQL and transition of health condition. The subject were 443 elderly hemodialysis patients(over 65 years old) in Seoul and Gyeonggi province. The Health-related quality of life scale was used in this research, in which were analysed a wide range of statistical descriptive analysis, Pearson's correlation, reliability analysis, multiple regression and the Scheffe test. The results were as follows. The HRQL were statiscally significant difference by Gender, Educational level, Live with spouse, Best supporter, and Number of Disease. Also the factor related to transition of health condition was Number of Disease. The transition of health condition accounted for 13.9% of variance in HRQL and Number of Disease accounted for an additional 7.4% of HRQL. The factors, which influenced finally on the HRQL in the elderly hemodialysis patients, were transition of health condition and number of disease. In conclusion adequate hemodialysis treatment and social services should be provided in accordance with the factors affecting HRQL in order to improve the HRQL for elderly hemodialysis patients.

• 월간 기계설비
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• no.3 s.188
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• pp.87-90
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• 2006

• Journal of the Korean Data and Information Science Society
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• v.28 no.6
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• pp.1371-1382
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• 2017

The purpose of this study was to identify the mediating effect of resilience in the relationship between stigma and quality of life (QOL) in lung cancer patients. Participants were 119 lung cancer patients who visited the outpatient department of a hospital. The subjects completed a questionnaire of stigma, resilience and QOL. Data were analyzed using t-test, ANOVA, Scheffe test, Pearson correlation, three-step regressions to test mediating effect and Sobel test. Stigma was negatively correlated with resilience and QOL. Resilience was positively correlated with QOL. Stigma explained 15.0% of the variance of resilience. Stigma and resilience explained 41.0% of the variance of QOL. Resilience had a partial mediating effect in the relationship between stigma and QOL. The results suggest that a nursing intervention to decrease stigma and enhance resilience is recommended to improve QOL in lung cancer patients.

• The Journal of the Korea Contents Association
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• v.19 no.6
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• pp.311-324
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• 2019

The purpose of this study is to analyze the mediating effects of employee outcomes on the relationship between quality of employment and organizational performance and to understand the specific mechanism of the impact of employment quality on organizational performance. Although there has been a widespread debate on the merits of the quality of employment, there have been few studies dealing with how the quality of employment contributes to organizational performance. For the empirical analysis, we analyzed the mediating effect of employee outcomes on the relationship between employment quality and employee outcomes (human capital competence and collective organizational commitment) and employment quality and organizational performance for 501 Korean companies. The results showed that the higher the quality of employment, the higher the employee's human capital competence and collective organizational commitment, and the employee outcomes mediate the relationship between the quality of employment and organizational performance.