• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.676-677
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• 2015

In Korea, NSDI(National Spatial Data Infrastructure) was implemented for integrating and sharing the nationally generated spatial data. One of the main roles of implementing NSDI is providing spatial data to public agencies. And now, the establishment plan for NSDI with the technical advancement should be needed. This paper deals with the technical aspects of adopting cloud service in the NSDI. First, we propose the concept for target system, which shows the current and future NSDI. In the future NSDI model, GIS cloud and governance systems are included. Service functions for cloud system and infrastructure implementation design directions are derived. Finally, governance system implementation plan is described. This research will contribute to the implementation of NSDI cloud service system.

• 정보학연구
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• 제5권2호
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• pp.35-45
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• 2002

분산 시스템에서는 정보가 공중망을 통해 교환되므로 쉽게 도청되거나 또는 변경될 수 있다. 따라서 분산 시스템에서의 보안정책은 전송 중이거나 또는 단말기 내에서 정보를 보장할 수 있어야한다. 이 논문에서는 두 단말기 내에 각각 존재하는 두 AP(Application Process)들 사이의 통신은 Open System Interconnection(OSI-RM)을 위한 ISO Reference Model[2]에 따라 일어난다고 가정하였다. OSI 보안 services와 Biba 보안모델 사이에 관계를 만들어 내는데 Public Key Systems(PKSs)가 사용되었고, 대칭과 비대칭 cryptographic systems에서 어떻게 하면 key 분배가 최소화할 수 있는지에 대하여 연구되었다.

• 산업공학
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• 제20권3호
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• pp.339-352
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• 2007

Beyond SERVQUAL-based service quality research, we develop a measurement model of public service quality that would provide researchers and practitioners in the public sector with a foundation for systematic investigation and implementation. Firstly, we explore the attributes of public service quality that lead to customer satisfaction by using the critical incident technique (CIT). We identified four dimensions of public service qualities. We also found that the critical attributes of service quality differ according to the types of customers. Secondly, to achieve a high degree of empirical confidence, we conduct statistical tests and analyses on the classification scheme and on the attributes of service quality that we derived from the CIT analysis. Through these analyses, we could remove the redundancy among attributes and group the attributes into new constructs, which are mutually exclusive and exhaustive; we built a more sophisticated measurement model of service quality.

• 한국IT서비스학회지
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• 제10권2호
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• pp.141-162
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• 2011

The controls of Information Systems (IS) have been an more critical issue controls as the sophistication and integration of IS is more proceeded. ITGI (The Information Technology Governance Institute) of ISACA (Information Systems Audit and Control Association) has suggested COBIT (Control Objectives for Information and related Technology) and this has been widely recognized the evaluation model of IS controls. In COBIT, IS was evaluated in terms of process, information quality, and IT resources. This study used COBIT in order to suggest and empirically test an evaluation model of IS service. The data was collated from one major Chinese SI (Systems Integration) company in four domains of processes : planning and organization, acquisition and implementation, delivery and support, and monitoring. Seven factors are extracted using an exploratory factor analysis as follows : Overall IT planning process, technological assessment process in IT planning of IT, cost-benefit assessment process in IT planning, implementation process, support process, monitoring process, post-implementation evaluation process. The results of confirmatory analysis of three alternative measurement models indicated that the measurement model with one inherent or conceptual variable has greater model fitness than the other models. This study suggests the logical and general way to test and apply COBIT in evaluating IS services.

• Journal of Information Technology Applications and Management
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• 제12권1호
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• pp.157-172
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• 2005

Recently, location-based service (LBS) is a hot issue in the field of computer applications. So many papers introducing new techniques of implementing a LBS and new application fields of LBS have been published recently. However, to the best of our knowledge, none of them discusses feasibility test in the prior to the implementation. The importance of a feasibility test for a design prior to the implementation cannot be overemphasized. This paper presents a method of feasibility test for a LBS design. Our method performs three steps. At the first step, we build a Petri net model of the LBS system which is depicted in natural language. The second step is to analyse the Petri net to find errors and flaws in the design. We also improve the Petri net model by fixing the errors and flaws in this step. A feasibility test is the third and final step. In this step. we verify if the design satisfies the user's requirement in the senses of quality of service (QoS) and of minimizing the implementation cost. The third step is performed in the manner of mathematical analysis of the Petri net.

• 디지털융복합연구
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• 제10권11호
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• pp.11-27
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• 2012

본 연구의 목적은 외부 IT감리의 핵심 성공 요인을 제시하는 것이다. 이를 위해, 정보시스템 성공 모형과 서비스 품질 개념을 기반으로 통합 모델을 제시하였다. 연구모형은 외부 감리를 수행한 경험이 있는 국내 공공기관을 표본으로 총 254개의 데이터를 수집하여 분석하였다. 분석결과 서비스 품질 특성 중 응답성, 신뢰성, 유형성은 정보시스템의 구현 프로세스 품질에 유의한 영향을 미치는 것으로 나타났다. 또한 프로세스 품질은 정보시스템 구현 성공(시스템 품질)에 유의한 영향을 미치는 것으로 나타났다.

• 품질경영학회지
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• 제29권4호
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• pp.1-17
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• 2001

The characteristics of Telecommunication Industry encompass not only hardware and software but also the service aspect of them. One way to improve the industry up to the international level in terms of hardware and software as well as service aspect is to comply with tile TL 9000 standard, which was established by QUEST Forum, the group consisted of U.S. communication industry, based on the ISO 9000 Quality Management System. In this study, design, establishment, implementation, maintenance and improvement of quality system for domestic telecommunication industry are thoroughly investigated based on TL 9000 standard, with its LCM(Life Cycle Model) model and measurements. Also, Process Approach is suggested to help the industry realize the system to meet its specific needs. In addition, specific examples with the successful certification to TL 9000 standard are presented.

• 한국컴퓨터정보학회지
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• 제14권2호
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• pp.109-115
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• 2006

이 논문에서는 OSGi 서비스 프레임워크 환경에서 발생할 수 있는 보안 요구 사항 중에서 서로 다른 번들의 서비스간의 상호 작용에서 발생할 수 있는 접근 제어(access control)문제를 설명하고 이를 만족시킬 수 있는 구체적인 서비스 보안 모델을 제시하였다. 특히 번들이나 서비스에 대한 접근 통제를 유연성과 확장성이 보장되는 방식으로 처리 할 수 있도록 번들에 포함된 파일 형식으로 명시될 보안 정책(security policy)의 구성요소와 의미론을 정의한다. 또한, 원격 관리 서비스를 위한 효율적인 서비스 구조를 제안하였다.

• 산업공학
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• 제14권2호
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• pp.172-181
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• 2001

Application Service Provider(ASP), the service provider who manages and delivers standard application functionality or associated service across a network to multiple customers using a usage-based pricing model, has appeared as a new business style in information technology market. For successful implementation of the ASP model, some critical issues should be noted. Because these issues are related to service qualities, certification and audit of ASP are important. This paper investigates characteristics of the ASP model and designs the proper frameworks for certification and audit of ASP. It is examined how the framework can remove potential threats and risks of the ASP model, and how the framework can be compared with traditional approaches.

• 인터넷정보학회논문지
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• 제7권1호
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• pp.121-130
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• 2006

차세대 무선 네트워크에서는 응용들이 실시간 선불 서비스를 제공해야 하며, 최종 사용자에게 서비스를 제공하기 이전에 요청된 서비스에 대해 신용을 사전 체크하여야 한다. 또한 선불서비스를 효과적으로 제공하기 위해서는 신용제어 기능이 최소한의 지연만을 가져야 한다. 본 논문에서는 모바일 IPv6 환경에서 실시간 신용제어가 가능한 권한검증 구현 모델을 제안하였다. 제안한 모델은 일반적인 신용제어 권한검증 절차와 모바일 IPv6 인증 절차를 통합한 구조를 갖는다. 지연을 최소화하기 위해 제안한 모델을 싱글 서버 내에 구현하였으며, 이 시스템은 권한검증과 인증을 동시에 수행한다. 구현한 시스템의 구현구조를 소프트웨어 기능 블록과 유니트 형태로 제시하였다. 구현한 모델의 feasibility를 검증하기 위해서 구현한 시스템의 지연을 측정하였으며 측정 시, 몇 가지 인증 확장 프로토콜 (EAP)을 적용하였다. 측정된 결과에 따르면 신용제어 권한검증과 인증이 분리된 기존 모델과 비해서 제안한 통합 모델이 상대적으로 지연시간이 적었다.