• Journal of the Korean Society for Library and Information Science
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• v.35 no.3
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• pp.93-115
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• 2001

Evaluating information quality of government Web service, applying quality measurement methods for web - database was conducted. This approach intended to control the quality of information service by indicating the problems and weak points in terms of retrieval, use of easiness, and user support, and by suggesting the guidelines for improvement. There were two main results to most of the investigation. The first one indicated that web information service of eighty-two percent of domestic government sites was not good enough (less than middle score). and only eight percent of them got higher score than middle point. The second result was that user support aspect was the worst part that we need to consider future course of action for service improvement. More specific guidelines were summarized at the discussion section.

• The KIPS Transactions:PartD
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• v.9D no.4
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• pp.613-618
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• 2002

The component-based development methodology becomes famous as the new technology for reuse. That technology can help us easily develop a complex and large system by composing reusable components in short period with high-quality and low-cost. The component-based system nay be developed by composing more than one component. So, the quality of component-based system is determined by individual component duality. Therefore, it is necessary to measure individual component quality for the improvement in quality of component-based system. Hence, in this paper, we propose new component metrics for measuring the cohesion as relationship between classes and interfaces or among classes. Those can be applied in the early stage of software development life cycle. So, we can measure the functional cohesion of component which will be developed. Predicting functional independence of a component, we expect to reduce the software developing cost & effort and improve software quality by reusing a component.

• Journal of Korea Multimedia Society
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• v.8 no.5
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• pp.715-720
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• 2005

In a software development process, it is necessary to have a method which verifies and satisfies users' requirements in their point of view. This allows the system developer to design a high qualify software system and have it developed and used in an effective way since users' requirements have well been shown through it. In this paper, we propose the RV-UI model system that can verify users' requirements a step ahead of system implementation step. This RV-UI model system has standardized user interface which is in practical use into functional model for each process and it is designed to satisfy users' requirements and manage configuration of them through the interface which has the Kano model.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.643-645
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• 2001

B2C 쇼핑몰 시스템의 경우 사용자 인터페이스에 관련된 부분에서만 차이를 보일 뿐 시스템의 기능적인 요구사항과 아키텍처는 유사하며 재사용 가능한 컴포넌트나 COTS 제품을 사용하여 시스템의 많은 부분을 구축할 수 있다. 따라서 쇼핑몰 시스템 구축 시 매번 각 기능들을 설계하고 구현하는 것은 중복 투자를 하는 것과 같다. 이에 본 논문에서는 B2C 소핑몰 시스템의 공통 요구사항을 기반으로 B2C 쇼핑몰 시스템 구축을 위한 프로덕트 라인을 제시한다. 쇼핑몰 시스템 구축에 프로덕트 라인을 적용한다면 중복 투자를 줄이고 미리 준비한 COTS 제품이나 컴포넌트를 사용하여 좋은 품질의 시스템을 빠르게 구축할 수 있다. B2C 쇼핑몰 시스템의 프로덕트 라인을 제시하기 위해 프로덕트 라인의 Core Asset Development 프로세스를 수행하여 쇼핑몰 시스템에 특화된 Product Line Scope, Core Assets, Production Plane을 정의하였다. B2C 쇼핑몰 시스템의 Product Lien Scope는 웹 상에서 물건 판매, 주문 정보 접수, 고객 정보 관리 등의 공통점과 가격의 고정 여부, 검색 등 기타 기능, 공동구매 기능 등의 차이점으로 정의할 수 있다. Core Asset는 B2C 쇼핑몰 시스템의 아키텍처와 시험 및 설계 방법, 재사용 가능한 컴퍼넌트 목록 등이 있다. 마지막으로 Production Plan은 각각의 Core Asset의 부착 프로세스를 연결하여 제시한다. B2C 쇼핑몰 시스템의 Production Plan은 프로젝트 계획, 아키텍처 정체, 사용자 인터페이스 프로토타핑, 컴포넌트 획득, 구현, 통합 및 테스팅, 운영 단계로 구성된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.171-174
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• 2008

컴퓨터 시뮬레이션을 통한 자연스러운 가상 성형은 컴퓨터 그래픽스와 애니메이션 분야의 오래된 연구 주제이다. 본 논문은 2D 가상 성형 시스템 용도의 가변 워핑 마스크를 이용한 시그모이드 블렌딩 방법을 제안함으로써 가상 성형의 품질 만족도와 편의성 및 실용성을 제고함에 그 목적이 있다. 제안된 2D 가상 성형 시스템은 마우스로 스머지 필터를 조작하여 얼굴 구성 요소의 윤곽 형상을 원하는 형태로 변형할 수 있는 직관적인 사용자 인터페이스를 제공한다. 얼굴 구성 요소의 스머징 전후의 윤곽선을 대상으로 다각형 근사화에 기반한 계층적 제어선 매핑을 통해 획득한 제어선 쌍들을 이용하여 반자동 필드 워핑을 수행함으로써 소스 제어선으로부터 목표 제어선까지 점진적으로 변해가는 다수의 중간 프레임들을 생성한다. 또한 이 반자동 필드 워핑을 수행할 시, 성형 부위의 변형을 따라 단계적으로 모양이 변하는 가변 워핑 마스크를 사용함으로써 변형 부위 이외의 얼굴 구성 요소들에 대해서는 왜곡을 최소화하는 지역적 변형 특성을 제고하고, 이렇게 생성된 성형 부위를 가변 모핑 마스크의 경계 영역에서 시그모이드 함수에 기반한 블렌딩을 수행하는 것이 특징이다. 제안된 2D 가상 성형 시스템은 직관적이고 편리한 사용자 인터페이스를 제공할 수 있기 때문에 시간이 적게 소요되고 작업 피로도가 낮아 실용성이 높다. 특히 짧은 시간 내에 성형의와 고객이 만족하는 직관적인 상담을 가능케 하는 것이 장점이다.

• Journal of the HCI Society of Korea
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• v.2 no.2
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• pp.53-59
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• 2007

Several researches in 3D interaction have identified and extensively studied the four basic interaction tasks for 3D/VE applications, namely, navigation, selection, manipulation and system control. These interaction schemes in the real world or VE are generally suitable for interacting with small graspable objects. In some applications, it is important to duplicate real world behavior. For example, a training system for a manual assembly task and usability verification system benefits from a realistic system for object grasping and manipulation. However, it is not appropriate to instantly apply these interaction technologies to such applications, because the quality of simulated grasping and manipulation has been limited. Therefore, we introduce the intuitive and natural 3D interaction haptic interface supporting high-precision hand operations and realistic haptic feedback.

• Journal of Korea Spatial Information System Society
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• v.7 no.3 s.15
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• pp.93-106
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• 2005

Recently, the web map services with standard interfaces have been developed to a high degree for the purpose of sharing of spatial data through the web. Among the various kinds of works related, the specification for the web map service released by Open Geospatial Consortium (OGC) is the most prominent, and is nearly adopted as international standard (ISO/DIS 19128) in developing the web map servers. The web map server of OGC, however, provides the insufficient capabilities for mobile applications. Unlike the wired applications, the mobile applications would require the map server to minimize of size of data transferred, because the size of data is very important factor in communication cost and the response time of map clients. And the mobile applications require different quality of map according to the screen size of mobile devices. The mobile application, also require some application specific queries. In this paper, We have Proposed the interfaces for mobile web map services (M-WMS) which fully comply with the standard interfaces proposed in OGC. And we have designed and implemented the web map server for mobile map services. This paper has contributed to construction and practical use of the web map servers in mobile applications, such as LBS and telematics.

• Journal of KIISE:Software and Applications
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• v.31 no.5
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• pp.677-696
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• 2004

Component-based software engineering (CBSE) composes reusable components and develops applications with the components. CBSE is admitted to be a new paradigm that reduces the costs and times to develop software systems. The high quality of component designs can be assured if the consistency and correctness among the elements of a component are verified with formal specifications. Current formal languages for components include only some parts of contracts between interfaces, structural aspects and behavioral aspects of component, component-based system, component composition and variability. Therefore, it is not adequate to use current formal languages in all steps of a component design process. In this paper, we suggest a formal language to specify component designs Component-Z. Component-Z extends Object-Z, adds new notations to specify components. It can be possible to specify interfaces, the inner structure of a component, inner workflows, and workflows among interfaces with Component-Z. In addition, Component-Z provides the notations and semantics to specify variability with variation points, variants and required interfaces. The relation between interfaces and components is defined with mapping schemas. Parallel operator is used to specify component composition. It can be possible to describe deployed components with the specifications of component-based systems. Therefore, the formal specification language proposed in this paper can represent all elements to design components. In the case study, we specify an account management system in a bank so that we show that Component-Z can be used in all steps of component design.

• Journal of the Korea Society of Computer and Information
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• v.19 no.12
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• pp.299-307
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• 2014

Nowadays, SNS media has become one of the most common and economic communication methods in the modern word. With the rapid development of communication technology, a variety of SNS media makes easier for us to reach other people everywhere and people are getting more and more reliant on them. The surge in SNS media users and SNS media diversity gets more important every day, but academic research on SNS media evaluation program is scanty. In order to present an evaluation program on the SNS media, this study selected some applicable measurement factors based on reference research, and then evaluate major SNS medias by using AHP analysis method. With these purposes, Kakaotalk, Twitter and Facebook, are the three major SNS medias that were chosen for the analysis. Through collections and analysis of usability evaluation factors about SNS quality from related literature, some factors were concluded: system quality, information quality, interface quality and service quality, to build an AHP frame. And to achieve these purposes, this study applied comprehend mutual questionnaire survey for experts and users to gather research date. Empirical studies about the results were performed using AHP method with Microsoft Office Excel 2010. In this study, the final SNS media evaluation result is that Kakaotalk ranks first of the three SNS media, Facebook is in the second place, and Twitter as least. When SNS media are evaluated, system quality, information quality, interface quality and service quality should be considered. Among all factors, service quality is the most important.

• Journal of KIISE:Software and Applications
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• v.31 no.6
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• pp.760-772
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• 2004

Component Based Development(CBD) Methodology is widely used in software development lifecycle to improve software quality. The Component Based Development(CBD) results to improve software reusability and reduce development term and cost. For this reason, lots of Enterprises are trying to make their processes to components. But, there has been few quality assurance or reusability testing action to those components. Most software component users can not know how their components are reusable and what extent their components satisfy to th eir quality requirements. For this reason, this paper suggests that software components can be measured their reusability by metrics proposed by this paper. We propose that in measuring software component reusability, there are direct metrics and indirect metrics. The results made by direct metrics are suggested to measure indirect metrics, so results to obtain reusability metrics.