• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.613-616
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• 2014

오늘날 선박, 항공, 자동차산업 등의 복합화로 인하여 내장형 소프트웨어의 중요성이 크게 대두되고 있다. 중요도가 높아질수록 고장 현상 발생률이 증가하고 이에 따른 오류나 고장에 대한 영향도 급증 하기 때문에, 신뢰성이 그만큼 중요하게 되었다. 신뢰성은 ISO/IEC 9126, ISO/IEC 12119 등에서 기능성, 사용성, 효율성, 유지보수성, 이식성과 함께 언급되고 있다. 신뢰성의 부특성에는 성숙성, 오류허용성, 회복성, 준수성이 있고, 이에 따라 품질평가 항목 메트릭이 제시되어 있다. 그러나 신뢰성 평가 기준은 수리적 난해함과 데이터 수집에 관한 문제에 부딪혀 적용하는 데에 어려움이 따르는 실정이다. 이와 같은 문제점을 해결하기 위해, 각 세부 평가 항목에 대한 체크리스트를 가지고 품질평가 메트릭에 적용하였다. 또한, 기존에 제시되어 있는 대표적인 신뢰성 모델 두 가지 NHPP(Non-Homogeneous Poisson Process) Model과 Jelinski-Moranda Model을 성숙성과 오류허용성의 품질평가 메트릭과 연관시켜 효율적으로 신뢰성을 측정하는 방안에 대하여 모색하였다.

• Journal of the Korea Society of Computer and Information
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• v.26 no.12
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• pp.151-158
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• 2021

Internet of Things (IoT) technology, which provides services by connecting various objects in the real world and objects in the virtual world based on the Internet, is emerging as a technology that enables a hyper-connected society in the era of the 4th industrial revolution. Since IoT technology is a convergence technology that encompasses devices, networks, platforms, and services, various studies are being conducted. Among these studies, studies on measures that can measure service quality provided by IoT software are still insufficient. IoT software has hardware parts of the Internet of Things, technologies based on them, features of embedded software, and network features. These features are used as elements defining IoT software quality measurement metrics. However, these features are considered in the metrics related to IoT software quality measurement so far. Therefore, this paper presents a metric for reusability measurement among various quality factors of IoT software in consideration of these factors. In particular, since IoT software is used through IoT devices, services in IoT software must be designed to be changed, replaced, or expanded, and metrics that can measure this are very necessary. In this paper, we propose three metrics: changeability, replaceability, and scalability that can measure and evaluate the reusability of IoT software services were presented, and the metrics presented through case studies were verified. It is expected that the service quality verification of IoT software will be carried out through the metrics presented in this paper, thereby contributing to the improvement of users' service satisfaction.

• The Journal of Society for e-Business Studies
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• v.15 no.2
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• pp.19-35
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• 2010

In response to an increased need, various methods for ontology modularization have been proposed. However, few studies have focused on evaluative methods for ontology modules. In this study, we devise novel metrics to measure ontology modularity. To evaluate the ontology modules, we introduce cohesion and coupling based on the theory of software metrics. A cohesion metric and two coupling metrics were used to measure cohesion and coupling for ontology modules. These metrics were also used to check consistency between the ontology modules and the original ontology. The new metrics support a more detailed relationship between classes in ontology modules. We validate the proposed metrics using the well known verification framework and perform the empirical experiments to complement previous investigations. This study offers ontology engineers valuable criteria with which to select and use ontology modules and modularization techniques.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.373-374
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• 2017

최근 모바일과 관련된 주요 플랫폼의 등장과 모바일 시장의 지속적인 성장 따라, 더 이상 기존 기업도 모바일 어플리케이션 개발은 선택의 문제가 아님을 인식하여 지속적인 투자를 하고 있다. 하지만 모바일 어플리케이션 시장의 급성장에 비해 품질평가 기준이 명확하지 않아 검증되지 않은 모바일 어플리케이션이 유포되고 있는 것이 현실이다. 이 논문에서는 국제표준인 ISO/IEC 9126-2의 품질 메트릭에 기반하여 다양한 모바일 디바이스 환경에서 모바일 어플리케이션의 성능에 대한 품질평가 방안을 제시하고 있다.

• Journal of the Korea Society of Computer and Information
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• v.11 no.5 s.43
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• pp.139-148
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• 2006

This study is intended to propose quality criteria and Web metrics for usability quality evaluation of multimedia Web sites. Recently, applications of the Web sites are not limited to the area of industry and operating as it integrates the new technology. Also as information super highway becomes common with development or network technology, multimedia Web site is on the rise due to various use of multimedia attributes. Therefore this study expands to apply HTML based Web site quality evaluation studied in Software engineering, HCI, Hypermedia to multimedia Web site, and suggests new metrics by integrating flash usability which is expanding its portion in multimedia Web site lately. The Web metrics proposed in this study are verified by heuristic evaluation from a group of expert. It analyses the results of quantitative and qualitative qualify evaluation on Web Award Korea by comparing the award-winning, high-quality Web site with non-winning Web sites. This study can be used to establish guideline for high-quality multimedia Web site development in the future.

• Journal of Broadcast Engineering
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• v.12 no.2
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• pp.102-111
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• 2007

Currently, the efficient adaptive video streaming services and coding techniques are required to ensure quality of service (QoS) in diverse multimedia environments. To maintain optimal video quality in these environments, it is required to support scalable video coding (SVC) technique and proper QoS metric methods. In this paper, we propose a new quality metric that takes in to the temporal, the SNR, the spatial scalability on SVC. Experimental results shows that proposed method has a higher correlation with the subjective quality. We expect that the proposed metric plays an important role in deciding the coding parameter to optimize the quality of the SVC based video.

• Convergence Security Journal
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• v.10 no.1
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• pp.29-34
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• 2010

It is very important to evaluate the quality of soft wares based on SOA, which develops rapidly. Particularly, one of the most important properties influencing on the quality of system is complexity. Therefore, we propose the metrics for measuring a structural complexity of softwares based on SOA. The proposed metrics is composed of the size of a service, the depth of a service and interdependency from the viewpoint of system structure, and finally we applied the proposed metric to an example.

• Journal of the Korea Society of Computer and Information
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• v.14 no.8
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• pp.59-64
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• 2009

This paper is intended to study how well the routing protocol supplied in wireless mesh networks can evade interference path along the applied routing metric. Wireless mesh networks, unlike existing network techniques, has the characteristics that node movement is less and energy effect is limited. Therefore. this type of network requires path configuring technique to reflect such network characteristics and new routing metric to determine proper path. Routing metric proposed recently is designed to produce link quality accurately, but it configures path not considering the traffic situation of adjacent nodes. Thus. this technique has the problems of reduced transfer rate and delay between terminals occurring due to frequent traffic chaos by the interference of adjacent nodes. Therefore, this paper proposes metric that configures routing path by finding like metric that can transfer data effectively by considering the traffic situation of adjacent nodes. We confirmed through simulation that the proposed routing metric reduces the delay between terminals via the path that evades the traffic interference of adjacent node.

• Journal of KIISE:Software and Applications
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• v.30 no.10
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• pp.912-924
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• 2003

Design restructuring improves software quality by reorganizing design elements and reduces maintenance cost. Object-oriented metrics can help to detect design flaws and find transformations to reorganize design elements. Basically, the transformations must preserve the behavior of an initial system. This paper describes a metric based restructuring technique preserving the behavior of object-oriented designs, founded on set theory, and gives its validity by applying the technique to applications written in Java. This paper also compares the technique with a technique using simulated annealing algorithm to show its effectiveness.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.798-801
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• 2009

인구의 고령화와 정보통신 기술의 발전이 맞물리면서 의료비 지출에 대한 절감의 필요성과 편리한 의료 서비스를 이용하고자 하는 소비자의 욕구, 병원에 구축된 IT인프라의 효과를 극대화 시키고자하는 공급자의 욕구 등이 부합되면서 그 기반이 조성된 것으로 볼 수 있다. 본 연구에서는 u-health 소프트웨어의 분야의 기반 기술을 조사하고 u-health 소프트웨어 시장과 표준화 동향을 조사하며 u-health 소프트웨어 신뢰성의 품질평가 메트릭을 개발하였다.