• Journal of KIISE:Databases
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• v.28 no.1
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• pp.1-14
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• 2001

중대한 산업용 소프트웨어가 동작하는 공유된 객체지향 데이터베이스를 안전하게 변경하기 위해서는, 그 공유 데이터베이스를 변경할 동안 데이터베이스 위에서 작동하는 기존의 응용 프로그램이 지속적으로 작동되어야 한다. 데이터베이스 변경을 필요로 하는 새로운 요구사항은 새 응용 프로그램의 추가, 기존 응용 프로그램의 기능 확장, 초기 디자인 에러 수정 등으로 인하여 발생할 수 있다. 우리는 한 사람의 사용자가 다른 사용자에게 악영향을 주지 않고 데이터베이스 스키마를 변경할 수 있게 하여 이 문제를 해결하는 투명한 스키마 진화(TSE: Transparent Schema Evolution) 방법론을 소개한다. 이 방법론은 기존의 스키마를 직접 변경하는 대신 스키마 변경 연산의 의미를 반영하는 데이터베이스 큐를 공유 객체지향 데이터베이스 상에 생성하여 투명한 진화를 달성한다. 데이터베이스의 용량을 증가시키지 못하는 뷰 메카니즘의 한계를 극복하기 위하여 이 방법론은 데이터베이스 용량 증가 연산에 대하여 다음의 새 단계로 정렬된다. (1) 기저의 베이스 스키마는 데이터베이스 용량 증가를 위해 물리적으로 변호한다. (2) 데이터베이스 변경의 의미를 달성하는 목표 뷰가 위의 변화된 베이스 스키마로부터 생성된다. (3) 변화 이전의 베이스 스키마는 데이터베이스 뷰로서 재 구축된다. 이로써 기존의 다른 사용자가 정의한 데이터 인터페이스가 보존된다. 우리는 객체-지향 뷰 기술을 이용하여 스키마 변화 연산을 구현함으로써 TSE 방법론의 구현가능성(feasibility)을 확인하였다. 표준적인 객체-지향 뷰 모델이 정의되고 상용 객체-지향 데이터베이스인 잼스톤(Gemstone) 위에 구현되었다. 그 뷰 모델은 갱신 의미(semantic) 정의를 그 뷰가 베이스 스키마의 갱신 의미를 보존하도록 정의하였다. 그러한 뷰는 사용자가 그들이 실제로는 베이스 스키마가 아니라 뷰에서 작업하고 있다는 사실을 모르게 하기 위하여 TSE에서 필요하다.

• The Journal of the Korea Contents Association
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• v.8 no.9
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• pp.242-250
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• 2008

The purpose of this study is to verifying the differences of the customer-orientation according to the business characteristics and the relations between customer-orientation and employees' satisfaction focused on the two groups of the service business. The results of the analysis are as followings : The customer-orientation of two groups are very similar to each other because of the job characteristics of the telemarketers. And only the difference of the real customer-orientation factors is significant on the relations between customer-orientation and employees' satisfaction. The results of the analysis reveal that the controls and the efforts of the telemarketers on the real customer-orientation factors are necessary. This study is meaningful because it brings the practical importance of the telemarketing and expands the scope of the study connecting the importance of the customer-orientation theories.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.6B
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• pp.369-376
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• 2005

While XML is employed in a variety of fields, editing XML document is still hard for the beginners and ordinary individuals. In this paper, we present a syntax-directed editor which is designed to provide unprofessional XML users with easy guides of using XML document. Along with the definition, abstract syntax (data structure of syntax-directed editor) would be explicitly defined. Components of the editor will be projected according to the projected definition of the abstract syntax rule of this paper. Moreover we show that the automatic generation of the abstract syntax rules coming from DTD would enhance the use of XML syntax-directed editor in faster and more precise ways. It could be easier to generate XML syntax-directed editor through a structure of abstract syntax and standard procedure of manufacturing syntax-directed editor.

• Journal of KIISE:Software and Applications
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• v.30 no.11
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• pp.1102-1111
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• 2003

Spreadsheet is one of the most widely used programming tool because of its ease of use, however there have been few researches on applying object-oriented techniques in developing spreadsheet applications. Generally, spreadsheet applications contain a lot of errors, and spreadsheet has some drawbacks such as low reusability and hard maintenance. In order to solve these problems, we introduce an object-oriented spreadsheet system, named XCEL. It enables users to develop applications using systematic techniques with data modelling method, and allows users to apply object-oriented technologies to spreadsheet programming. The data modelling method allows to define classes using XML and flowchart, and the spreadsheet represents an object with contiguous cells. XCEL has advantage that users can apply object-oriented technology to spreadsheet programming.

• The Journal of the Korea Contents Association
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• v.12 no.12
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• pp.156-169
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• 2012

The purpose of the study was to analyze the relationship between motivation, psychological euphoria and adherence intention in elders. To achieve this purpose, subjects of this study were sampled 249 dancesports participant from J and K city in Jeonbuk. Data were collected through the self-administrated questionnaires which were used by preceding study. The factor analysis method was used correlation analysis, multiple regression analysis and three-step mediated regression analysis. The results of the analysis are as follows: First, motivation(health, hobby) had positive effects on psychological euphoria(accomplishment, satisfaction). Second, motivation(health, hobby) had positive effects on adherence intention. Third, psychological euphoria(accomplishment, satisfaction) had positive effects on adherence intention. Forth, psychological euphoria mediated between motivation and adherence intention.

• Journal of Korea Multimedia Society
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• v.7 no.10
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• pp.1485-1495
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• 2004

We propose the representation of a improved dynamic object-oriented program dependence graph so as to process the slicing of object-oriented programs that is composed of related programs in order to process certain jobs. We also propose an efficient slicing algorithm using the relations of relative tables in order to compute dynamic slices of object-oriented programs. We programmed the algorithm by using fortran and Visual C++. The procedure that computes the dynamic object-oriented program slices using the improved dynamic object-oriented program dependence graph(IDOPDC) is divided into four steps. Consequently, the efficiency of the proposed improved dynamic object-oriented program dependence graph(IDOPDG) technique is also compared with the dependence graph techniques discussed previously. As a result, this certifies that an improved dynamic object-oriented program dependence graph is more efficient in comparison with the traditional dynamic object-oriented program dependence graph(DOPDG).

• Journal of the Korea Society of Computer and Information
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• v.16 no.9
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• pp.155-162
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• 2011

It is using to incident angle estimation technique in order to target estimation in radar. This paper was estimated incident angle estimation for target using adaptive array incident angle and single look error incident angle estimation technique. We estimated signal incident angle of target to removal main lobe and side lobe to adaptive array incident angle technique. It is difficult to correctly target estimation because single look technique increase direction error of signal incident angle. In order to receive a desired target signal must be not almost look error between signal incident angle and look angle. we had decreased to occur a look error using delay time and single look condition to calculation a covariance when incident angle estimate. Through simulation, we show that the proposed incident angle estimation technique improves the performance of target estimation compared to previous method.

• Journal of KIISE:Software and Applications
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• v.31 no.7
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• pp.883-900
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• 2004

As object-oriented development technology that increases extensibility and reusability has been widely spread, it can shorten development period and enhance quality by reusing verified object-oriented artifacts. Thus we can construct high quality component-based system at short time transforming component-based model using verified object-oriented artifacts. In this paper, we propose techniques to transform available object-oriented design model into component-based model using formal specification techniques in order to increase accuracy of transformation. First, formal specification language for component is defined for formal specification of component-based design. And, techniques for formal specification of object-oriented design using Object-Z, a formal specification language, is proposed in structural, functional, and dynamic aspects. Next, we present techniques for transforming formal specification of object-oriented design into formal specification of component-based design. Through a case study we apply the proposed transformation techniques and show the transformation process of object-oriented formal specification into component-based formal specification.

• 한국디지털정책학회:학술대회논문집
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• 2006.12a
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• pp.211-221
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• 2006

본 연구는 국내하이테크 기업의 기술혁신지향성과 시장지향성이 기업 성과에 미치는지 여부를 규명하고자 Moorman & Miner(1997), Kohli, Jaworski & Kumar (1993)가 개한 척도를 사용하여 탐색적인 연구를 실행하였다. 설문은 2006년 11월 한달 동안 서울 경기지역의 혁신관련 교육을 수행하는 교육 기관과 기술 기반의 제품 개발과 서비스를 수행하는 업체를 대상으로 시행하였다. 가설 검증을 위해 총 200부의 설문지를 배포하여 60부를 회수하여 수집된 자료는 SPSS v12.0을 이용하여 요인분석과 회귀분석을 실시하였다. 분석결과 기술혁신지향성은 성과에 영향을 미치나 시장지향성이 기업의 성과에 미치는 영향에 대해서는 확인할 수 없었다.

• Journal of the Korea Computer Industry Society
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• v.5 no.9
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• pp.941-946
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• 2004

This Paper has been designed extend object-orientid database model that introducted new class basing the I-learning model. In order to implement this model, we have introducted E-learning class to traditional object-orinted database. And we designed querry for search data that basis on the heurilistic classficaslon model using stored data in extened object-oriend data model.