• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 학술대회지
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• pp.712-716
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• 2004

Because of rapid development of software technology, a number of software professionals have been concerned with component-based development methodologies. Up to date, the evaluation of component quality has been focused on object-oriented metric based methodology. But this paper presents the selection process and evaluation criteria based on an MCDM(Multiple Criteria Decision Making) technique for the selection of optimal COTS component from consumers' viewpoints. We considered functionality, efficiency and usability based on ISO/IEC 9126 for quality measurement and conducted practical analysis into commercial EJB component in internet. This paper shows that the proposed selection technique is applicable for the selection of the optimal COTS component.

• 디지털융복합연구
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• 제15권12호
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• pp.303-311
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• 2017

신생 정보기술의 등장에 따른 새로운 보안 위협에 대처하기 위해 기업은 통합보안괸리(Enterprise Security Management)시스템을 도입하고 솔루션 간 상호연동을 통해 중복투자나 자원 낭비를 줄이고 보안 위협에 대처하고 있다. 이에 따라 통합보안관리시스템이 보안성을 충족시킴을 입증하기 위해 관련 표준을 근거로 한 보안성 평가 메트릭의 구축이 필요한 실정이다. 따라서 본 연구에서는 통합보안괸리시스템에 대한 보안성을 평가할 수 있는 메트릭을 구축하기 위해 통합보안괸리시스템의 보안성 품질 관련 요구사항을 분석하고 총족 정도를 측정할 수 있는 메트릭을 구축하였다. 본 메트릭을 통해 ISO/IEC 15408과 ISO/IEC 25000 표준에 부합하는 보안성 평가의 일원화를 통한 시너지 효과를 얻을 수 있다. 이를 통해 통합보안관리시스템의 보안성 품질수준을 평가하는 모델을 구축하고, 향후 통합보안괸리시스템에 대한 평가방법의 표준화를 기할 수 있을 것으로 사료된다.

• 정보처리학회논문지D
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• 제12D권4호
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• pp.609-616
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• 2005

소프트웨어 개발의 높은 생산성을 향상시키기 위한 재사용 기술로 컴포넌트 기반 개발 방법론은 널리 사용되게 되었다. 컴포넌트의 재사용을 향상시키기 위해서는 설계된 컴포넌트가 측정가능 해야 하므로 컴포넌트의 품질을 정량적으로 평가할 메트릭스가 필요하다. 따라서 본 논문에서는 컴포넌트의 특성을 반영한 컴포넌트의 결합도 메트릭을 제안한다. 또한 제안된 결합도 메트릭의 정확성을 검증하기 위해 사례연구를 제시하고 기존 결합도 메트릭스와의 비교 분석 결과를 제시한다. 제안된 결합도 메트릭은 좀 더 정확하게 컴포넌트의 품질을 평가하고 Briand이 제시한 결합도 메트릭의 필요조건을 만족한다.

• Journal of Ecology and Environment
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• 제36권1호
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• pp.73-83
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• 2013

The object of this study was to evaluate lotic ecosystem health using multiple eco-metric approaches such as water chemistry diagnosis, physical habitat health evaluations, and biological integrity modeling at 100 streams of four major watersheds. For the study, eight chemical water quality parameters such as nutrients (N, P) and organic material were measured and 11-metric models of Qualitative Habitat Evaluation Index (QHEI) and multiple eco-metric health assessment model (MEHA) were applied to the four major watershed. Nutrient analysis of nitrogen (N) and phosphorus (P) in all watersheds indicated a eutrophic state depending on the locations of sampling streams. Physical habitat health, based on the QHEI model, averaged 114 (range: 56 - 194), judging as a "good condition" by the criteria of Plafkin et al. (1989). In addition, primary (H1 - H4), secondary (H5 - H7), and tertiary habitat metric variables (H8 - H11) were analyzed in relation to the physical habitat degradations. The plots of tolerant species ($P_{TS}$) and sensitive species ($P_{SS}$) to water quality showed that the proportions of $P_{TS}$ had positive linear functions with nutrients, and that the $P_{SS}$ had inverse linear relations with the chemical variables. The model of eco-metric health assessment showed that mean MEHA was 20.4, indicating a fair condition. Overall, our data suggest that water chemistry, based on nutrients and organic matter, directly modified the trophic structures in relation to food chain in the aquatic ecosystems, and then these directly influenced the compositions of tolerance/sensitive species, resulting in degradations of overall ecological health.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권2호
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• pp.138-153
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• 2010

The interactions between people who do not know each other have been greatly increased with the on-going increase of people's cyberspace activities. In this situation, there exist potential risk factors such as the possibility of fraud, so we need a method to reduce or eliminate those risk factors. Concerning this necessity, rating systems are widely used, and many trust metrics calculated from rate values that people give to each other are proposed to help them make decisions. However, the trust metrics decrease the accuracy, and this is caused by the different rating scales and ranges of each person. So, we propose a fuzzy adjustment method to solve this problem. It is possible to catch the exact meaning of the trust value that each person selects through applying fuzzy sets, which improve the accuracy of the trust metric calculated from the trust values. We have applied our fuzzy adjustment method to the TidalTrust algorithm, a representative algorithm for calculating the local scalar trust metric, and we performed an experimental evaluation with four data sets and three evaluation methods.

• 한국경영과학회지
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• 제19권1호
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• pp.41-52
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• 1994

Imprecision of evaluation or lack of prior information about preference can be an obstacle for decision maker in representing his strict preference. Therefore, fuzziness of preference can take place, and in addition, intransitivity or incomparability of preference becomes the critical difficulty in making complete preorder of alternatives. In order to get better solution and to improve practical usufulness, MCDM should be established as a pseudo-criterion model that include fuzzy preference. In this paper, we suggest a pseudo-criterion model that can make complete preorder of alternatives by metric distance measure.

• 정보처리학회논문지A
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• 제15A권3호
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• pp.167-180
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• 2008

가상화 시스템은 시스템 활용률을 높이는 반면, 추가된 가상화 계층으로 인해 응용 프로그램의 성능 저하를 가져오므로, 본 논문에서는 두 가지 측면을 모두 고려하여 비 가상화 시스템과 성능을 비교할 수 있도록 하는 가상화 시스템의 성능평가 방법을 제안하였다. 가상화 시스템과 비 가상화 시스템을 비교할 수 있는 성능 비교 지표(metric)로 통합작업처리량 대비 시스템 낭비율을 정의하고, 가상화 시스템과 비 가상화 시스템에서 각각 시스템 낭비율과 통합작업처리량을 구할 수 있는 방법을 제시하였다. 또한 제안한 성능 평가 방법을 이용하여 다양한 응용 프로그램들을 운영하는 가상화 시스템과 비 가상화 시스템의 성능을 비교함으로써 본 연구에서 제시하는 가상화 시스템의 성능평가 방법이 적합함을 보이고, 더불어 응용 프로그램의 서로 다른 특성이 가상화 시스템에 미치는 영향을 분석하였다.

• Journal of information and communication convergence engineering
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• 제7권2호
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• pp.185-192
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• 2009

In wireless mesh networks multi-rate technology environment, a mesh node can dynamically modify the data transmission rate on a particular link, in response to link distance, or more accurately, the perceived SNR ratio between neighbor nodes. In such networks, existing route selection schemes use a link quality metric. Thus, these schemes may easily result in the network being overloaded. In this paper, a new route metric is proposed; it considers both per-hop service delay and link quality at mesh nodes. In addition, the Load-Aware AODV (LA-AODV) protocol using the proposed metric is presented. The performance evaluation is performed by simulation using the OPNET simulator. It is demonstrated that the LA-AODV protocol outperforms the existing routing protocols using other existing route metrics in multi-rate WMN environment.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권5호
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• pp.1388-1399
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• 2012

This paper proposes a quality metric based on a No-Reference Bitstream (NR-B) having least computational complexity for the assessment of the human-perceptual quality of H.264 encoded video. The proposed NR-B method performs a modeling of encoding distortion with three bit-stream information (i.e. frame-rate, motion-vector, and quantization-parameter) that can be directly extractable from the encoded bitstream and does not require additional complex processing of final pictures. From performance evaluation using 165 compressed video sequences, the experiment results show that the proposed metric has a higher correlation with subjective quality than is achieved with other comparable methods.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제4권3호
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• pp.292-299
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• 2004

For Web System composed of a variety of hardware, software and network system, there is a wide difference in price, function and capacity. In addition, it is important to select the most suitable system when web system is constructed as the claim of high-quality web service from user has increased. Data of bench-marking is usually employed when the system is selected. Evaluation with the result of bench-marking, however, is not easy at web situation composed of a variety of systems. In this paper, first integrated bench-marking of hardware, software and network system metric were determined, and the plan to effectively compare and evaluate the result of bench-marking by using fuzzy set were offered.