• 한국철도학회논문집
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• 제7권3호
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• pp.215-222
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• 2004

Optimal route selection of railway should take consideration of the function of the railway, topography, practicability of construction and management as well as the cost. This study performed the surveys for experts and surrounding industries and the review for the bid guidelines in order to develop the quality model with the AHP method and establish the weight for each factor. Six quality models were developed for such as the efficiency of railway operation, structure design and practicability, economic feasibility, correspondence with other plans, civil appeal and environmental sustainability, and correspondence with system. The detailed evaluation elements were also derived by each factors.

• 한국기록관리학회지
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• 제24권1호
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• pp.163-186
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• 2024

2022년 국가기록원은 공공표준 「전자기록물 보존포맷 선정기준(v1.0)」을 제정하여 전자기록물 유형별로 적합한 보존포맷을 선정할 수 있도록 기준을 마련하였다. 기술 발전에 따라 파일포맷의 종류와 그에 따른 전자기록물의 유형이 다양하게 생산되고 있으나 문서 유형의 보존포맷 PDF/A-1b 외 다른 유형의 전자기록물에 적용 가능한 보존포맷은 제시되지 않고 있다. 본 논문은 보존포맷 선정기준의 범위를 확장할 수 있도록 시청각기록물, 특히 비디오 유형 전자기록물의 고유기준을 도출하는 것을 목적으로 한다. 고유기준을 마련하기 위해 비디오 유형 전자기록물에 관한 필수보존속성을 제안하며, 이를 기반으로 비디오 유형 고유기준을 도출하고자 한다. 이에, 비디오 파일의 특성에 따라 비디오(컨테이너)형, 비디오(코덱)형으로 구분하여 각각 3개, 6개 고유기준 평가항목을 도출하였고 평가항목별 평가문항을 설계하여 비디오 유형 전자기록물의 보존포맷 적합성 평가를 위한 선정기준을 제시하였다.

• 수산해양교육연구
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• 제26권6호
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• pp.1442-1450
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• 2014

The aim of this study is to develop a model for the alternative selection in port privatization using Brainstorming, the ISM and AHP methods. For this, 30 detailed attributing factors were identified by both previous studies and port users, Also, 13 attributing evaluation factors were identified by a group of port experts using the brainstorming method. These were made into a model of hierarchical structure with 3 levels, taking 1 goal factor, 5 evaluation factors and 7 alternative factors using the ISM method. The collected date of questionnaires through the AHP method were analyzed with a group of port experts for an empirical analysis. The result of the hierarchical level 2 shows that profitability is the most important factor, followed by public interest, management professionality, service quality and financial soundness. The analysis results of hierarchical level 3 shows that commercialization is the most important factor.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권4호
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• pp.1406-1423
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• 2014

Multi-mode device which combines multiple access technologies into a device will offer more cost-effective solution than a sole access implementation. Its concurrent multipath transfer (CMT) technology can transmit media flows over multiple end-to-end paths simultaneously, which is essential to select at least two paths from all available paths. At real networks, different paths are likely to overlap each other and even share bottleneck, which can weaken the path diversity gained through CMT. Spurred by this observation, it is necessary to select multiple independent paths as much as possible to avoid underlying shared bottleneck between topologically joint paths. Recent research in this context has shown that different paths with shared bottleneck can weaken the path diversity gained through CMT. In our earlier work, a grouping-based multipath selection (GMS) mechanism is introduced and developed. However, how to estimating the selection is still to be resolved. In this paper, we firstly introduce a Selection Correctness Index (SCI) to evaluate the correctness of selection results in actual CMT experiment. Therefore, this metric is helpful to discuss and validate the accuracy of the output paths. From extensive experiments with a realized prototype, the proposed scheme provides better evaluation tool and criterion in various network conditions.

• 상하수도학회지
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• 제38권2호
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• pp.69-81
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• 2024

In this study, an evaluation system that can be used to evaluate the feasibility of developing and supplying hydrothermal energy for the operation of large-scale complex facilities was developed. To this end, this study derived factors to be considered when selecting a location for the use of hydrothermal energy using raw water from multi-purpose dams and regional water supply systems through literature survey and expert interviews. The evaluation indicators derived from this study are divided into four sectors: hydrothermal energy utilization factors, location factors, planning factors, and disaster safety factors, and are composed of 10 mid-level indicators and 34 detailed planning indicators. The relative importance of all factors was derived using the Analytic Hierarchy Process (AHP) technique, and the developed evaluation indicators and relative importance were applied to four multi-purpose dam regions in the country. As a result, it was found that in the development and use of hydrothermal energy utilizing regional raw water supply line the urban planning conditions of the supply site can have a greater impact on the location selection results than the hydrothermal energy development itself. Due to the characteristics of the evaluation indicators developed in this study and their nature as comprehensive indicators, it is believed that the results should be applied to determine the overall adequacy of site selection in the early stages of hydrothermal energy development. In the future, it is believed that it will be necessary to analyze the problems in supplying and operating hydrothermal energy using raw water from multi-purpose dams and regional water resources. Based on the analysis the evaluation system developed in this study is expected to be improved and supplemented.

• Journal of information and communication convergence engineering
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• 제21권1호
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• pp.82-89
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• 2023

Various machine-learning models may yield high predictive power for massive time series for time series prediction. However, these models are prone to instability in terms of computational cost because of the high dimensionality of the feature space and nonoptimized hyperparameter settings. Considering the potential risk that model training with a high-dimensional feature set can be time-consuming, we evaluate a feature-importance-based feature selection method to derive a tradeoff between predictive power and computational cost for time series prediction. We used two machine learning techniques for performance evaluation to generate prediction models from a retail sales dataset. First, we ranked the features using impurity- and Local Interpretable Model-agnostic Explanations (LIME) -based feature importance measures in the prediction models. Then, the recursive feature elimination method was applied to eliminate unimportant features sequentially. Consequently, we obtained a subset of features that could lead to reduced model training time while preserving acceptable model performance.

• 한국비블리아학회지
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• 제14권1호
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• pp.79-90
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• 2003

• 한국정보처리학회논문지
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• 제4권10호
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• pp.2533-2543
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• 1997

컴퓨터 네트워크 장비의 객관적 선정을 위해서는 통신 서비스 품질(Quality of Service : QoS) 개념의 이해와 적용이 요구된다. ITU-T E.800 권고안은 공급자와 고객관점의 서비스 품질 및 만족도 평가 기준을 제시하고 있기 때문에 네트워크 제품 평가 및 선정에 이용될 수 있다. 본 연구에서는 QoS를 고려한 LAN 스위치 평가모형과 선정을 위한 소프트웨어 도구를 개발하였다. 이를 위한 구체적 평가방법으로 효과적인 집단 의사결정을 위한 다기준 평가 모형에서 유용하게 이용되는 Saaty의 계층적 분석방법(Analytic Hierarchy Process : AHP)을 적용하였다. 선정 평가를 위한 자료는 네트워크 전문가들에 대한 설문조사와 현장 조사 방법으로 수집하였다. 그리고 제안된 LAN 스위치 평가 모형에 따라 선정 도구를 구현하고 적용 결과를 분석하였다. 본 연구 결과는 LAN 스위치 선정을 위한 의사결정시 유용한 도구로 활용될 수 있을 것으로 기대되며, 아울러 컴퓨터 네트워크와 관련된 QoS 기반의 평가 및 선정을 위한 의사결정에 적용될 수 있을 것이다.

• 한국BIM학회 논문집
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• 제5권2호
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• pp.34-45
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• 2015

As buildings become larger and more complicated, construction costs have increased with a considerable effect on buildings' Life Cycle Cost (LCC). However, there has been little consideration on economic aspects in the selection of construction materials due to limited information on the materials and dependency in architects' experience and inefficiency in cost estimation, causing design changes, increase in maintenance cost, difficulty in budgeting, and decrease in building performance. To solve these problems, this study proposed a BIM-based material selection model which reflects the comprehensive economic efficiency of building materials. Our cost prediction model can estimates the material-related cost during the entire building life cycle. Furthermore, we implemented the proposed model in connection with BIM, which can analyze and compare LCC by material. Through the validation of the model, we could confirm the necessity of LCC-based material selection in comparison with the conventional cost-centered material selection.

• 한국건축시공학회지
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• 제12권6호
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• pp.682-700
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• 2012

Over the last several years, Korea has increasingly adopted design-build for public construction projects. There is a much greater awareness of the need to change to a system based on 'Value for Money', which is high on the government's agenda. A whole life performance bid evaluation model is proposed to aid decision makers in the selection of a design-builder. This is based on the integration of a framework using an analytic hierarchy process, as the bid awarding system is being changed from one based on the lowest price to one based on best value over the life-cycle. Key criteria such as whole life cost, service life planning and design quality are important through the key stages of the evaluation process. The model uses a systematic and holistic approach, which enables the public sector client to make better decisions in design-builder selection, which will deliver whole life benefits based on long-term cost-effectiveness.