• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.33 no.5
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• pp.385-396
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• 2015

The purpose of this study are in selecting a core service and drawing an analysis functions and service sector, based on contents of geo-spatial big data. For the study, the demand survey in the methodology has to be done by reviewing of preceding geo-spatial big data service. The survey has conducted by targeting on those experts in Industry-Academy-Research cooperation. From the survey, we could draw out requirements for the analysis function and the geo-spatial big data service sector. Also, order of priorities in service of four fields(Society, Environment, Economy, Humanities) has been utilized by a QFD(Quality Function Deployment). With the data, the first two priorities and required sectors for each field were selected for the analysis functions. From the result, we could suggest the core service model(plan), and also expect developments following each sectoral core service in the future.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.4
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• pp.449-459
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• 2021

More than 80 % of agricultural reservoirs are old facilities over 50 years old, and safety and function declines occur. As a result, safety accidents such as the collapse of the reservoir have occurred. Precise safety diagnosis is conducted in advance to prevent accidents such as reservoir collapse, and Water resources facility improvement project are implemented based on priority. However, the priority of the business is selected based on the subjective judgment of the facility manager. In this study, we set 80 hypotheses based on the results of precision safety diagnosis and decision-making examples of existing Water resources facility improvement project and selected 45 variables using correlation analysis and significance test. Using logistic regression analysis, the final 21 variables were selected and a decision support model was presented, and the classification accuracy of the model was 86.8 %. In this research, the part that presented the quantitative index for decision support when selecting the Water resources facility improvement project has important significance.

• Journal of Korea Water Resources Association
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• v.56 no.10
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• pp.679-690
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• 2023

Leakage is one of the representative abnormal conditions in Water distribution systems (WDSs). Leakage can potentially occur and cause immediate economic and hydraulic damage upon occurrence. Therefore, leakage detection is essential, but WDSs are located underground, it is difficult. Moreover, when multiple leakage occurs, it is required to prioritize restoration according to the scale and location of the leakage, applying for an optimal restoration framework can be advantageous in terms of system resilience. In this study, various leakage scenarios were generated based on the WDSs hydraulic model, and leakage detection was carried out containing location and scale using a Deep learning-based model. Finally, the leakage location and scale obtained from the detection results were used as a factor for the priority of leakage restoration, and the results of the priority of leakage restoration were derived. The priority of leakage restoration considered not only hydraulic factors but also socio-economic factors (e.g., leakage scale, important facilities).

• Korean Journal of Environment and Ecology
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• v.32 no.5
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• pp.532-540
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• 2018

Importance-performance analysis (IPA) is a simple and effective technique that can assist practitioners in prioritizing customer attributes to enhance service quality and visitor's satisfaction. The purpose of this study is to use the IPA-Kano model to examine the correlation of visitor's satisfaction and management matters and deduce the management priority. It classifies 14 visiting satisfaction attributes into basic factors (forest environments and staff/information center), performance factors (the natural landscape, trail facilities, forest status, easy access, and historical and cultural resources), and excitement factors (the value of natural monument, educational experiences, and entrance fee) to select the management priority according to the achievement (satisfaction). The management priority according to the performance is staff/information center > easy access > forest environment > trail facilities, historical and cultural resources, forest status, and natural landscape > entrance fee and educational experience > value of natural monument. By considering their performance, it further identifies development priorities for visitor's satisfaction improvement. These priorities allow local governments to deploy scarce resources to improve satisfaction.

• Journal of Korea Port Economic Association
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• v.26 no.2
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• pp.1-18
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• 2010

With the maturity and fierce competition of domestic logistics market, Korea government is actively working on the overseas investments in global logistics market after establishing the basic plan since 2006. In particular, India is selected one of promising countries for logistics investments since it has more 1.1 billion people and is regarded as post-China. In fact, a number of global logistics enterprises have started their businesses in the logistics market of India so that the competition already started. In this regard, it is highly necessary to find out feasible investment projects and then detemin the priority of the alternatives for successful investments. Therefore this study proposes a fuzzy-based AHP model by which the overseas investment problem was systematically structured and then evaluated. The model was established by exploiting a fuzzy theory and AHP for capturing the inexactness and vagueness of information. The results show that the investment of port operations is the number one priority in the India's logistics market and ODCY operations, road transportations, forwarding operations, inland depot operations in order. Finally the proposed model will help Korea's policy makers to have a better reliable investment strategy.

• The KIPS Transactions:PartD
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• v.16D no.5
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• pp.767-790
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• 2009

Setting up a priorityfor an embedded system is greatly significant because a release plan at the early stage of product developments can properly be established through right decision making procedures based on the priorities. For instance, both dependencies among requirements and the aspects of product developers should be considered into the priorities to improve the embedded system. Especially, trade-offs among the requirements, which are quite different depending on H/W and S/W architecture styles they use, should be acknowledged without exception. However, the selection process on the priority has hitherto been fairly systematic in the existing environment where hardware and software are not being considered at once. Therefore, this paper suggests an dependency and aspect-based model and process for the requirements of the priority. For this, the paper analyzes the trade-offs between the requirements depending on the disparate Architecture styles of H/W and S/W, and it also reflects the viewpoints of the developers. For thelast thing, the model and process suggested will be applied to the case of the development of both cell phones and cameras to gain authenticity and reliability. In conclusion, the danger occurring when the release plan is constructed can be minimized by screening the priorities that optimizes the embedded system more explicitly.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2013.04a
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• pp.42-43
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• 2013

원전 방화지역의 화재리스크는 존모델 또는 필드모델을 사용하지만 화재 시나리오 또는 현상의 고찰 없이 사용되어온 측면이 있다. 한편 PIRT 기법은 전산코드의 적합성을 평가하고 최신기술과 입력자료의 타당성을 분석하여 우선순위 등급을 선정한다. 따라서 PIRT 기법을 화재모델링 분석에 적용할 경우 화재모델링 분석방법의 개선과 결과 값의 신뢰성을 높일 수 있는 기술로 활용할 수 있다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1684-1689
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• 2006

본 논문에서는 진급추천 문제를 과학적이고 체계적으로 시행하기 위한 방안으로 정량적인 요소들과 불확실하고 모호한 정성적인 요소들을 고려하여 최적의 진급 대상자를 선정하는 다기준 순위결정 모델이 제시되었다. 모델은 평가요소에 대한 중요도 계산과 의사결정자들이 부여한 각 대상자들의 평가치를 통합하여 우선순위를 결정하는 방법을 제공한다. 진급추천 심사는 공정성, 객관성, 투명성의 확보를 통해 신뢰성 있는 심사 결과를 제시할 수 있어야 하며, 이를 위해 본 논문에서는 (가) 인사 관련 전문가들이 평가요소를 결정 (나) Internet을 이용하여 전자식 명목집단법으로 평가요소에 대한 중요도 결정 (다) 심사위원들이 진급 대상자별, 평가요소별로 평가 등급을 부여 (라) 심사위원들의 점수를 통합하여 순위를 결정하는 절차를 제시하였다. 평가등급의 부여는 퍼지이론의 소속함수을 응용하여 나타내었으며, Simulation을 통해 적정수의 심사위원 수를 결정하는 방법도 함께 제시되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.417-418
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• 2009

웹이 대중화되면서, 사용자 계층도 어린이, 노인, 장애인 등으로 다양해졌다. 인지적, 신체적 특징에 상관없이 모든 사람에게 동등한 웹 기회를 제공하고 있는가를 나타내는 지표가 웹 접근성이다. 웹 사이트들이 특정 수준의 웹 접근성을 준수하도록 유도하기 위해 W3C(World Wide Web Consourtium)의 WAI(Web Accessiability Initiative)는 웹 콘텐츠 접근성 가이드라인 WCAG (Web Content Accessibility Guideliens)를 개발하였다. 현재, WCAG2.0까지 발표된 가이드라인은, 4개의 원칙(Principle), 12개의 지침(Guideline), 그리고 61개의 성공기준(Success Criteria)으로 구성 되어 있다. 평가자들은 WCAG2.0에서 제시하는 성공 기준에 맞춰, 웹 사이트가 웹 접근성을 어느 수준으로 준수하고 있는지 평가한다. 하지만, WCAG2.0을 기준으로 웹 사이트를 평가할 경우, 성공기준의 준수여부는 평가가 가능하지만, 특정 사용자 집단의 특성을 반영한, 우선순위가 포함되지 않아, 특정 사용자 집단을 위한 개선 사항을 도출하는데 어려움이 있다. 이에, 본 논문에서는 이러한 점을 고려하여 WCAG2.0 기반의, 특정 사용 집단을 위한 웹 접근성 평가 모델을 제안한다. 사용자 특성에 따라 성공지침들의 중요도가 달라 질 수 있으므로, AHP 기법을 활용하여 성공지침들의 상대적 중요도를 평가하고, 우선순위화 하였다. 평가 모델의 효용성을 입증하기 위해, 특정 사용집단으로 노인 집단을 선정하여, 웹 접근성 평가 모델을 개발하였다.

• Journal of Korea Port Economic Association
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• v.28 no.1
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• pp.105-122
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• 2012

This paper proposes a fuzzy-based AHP model by which the greenhouse gas reduction for container terminal problem was systematically structured and then evaluated. The model was established by exploiting a fuzzy theory and AHP for capturing the inexactness and vagueness of information. In this study, measurement areas were selected for equipment aspect, operating aspect, and energy aspect. The greenhouse gas reduction is the number one priority in the equipment aspect, operating aspect, energy aspect in order. The analysis result of equipment aspect reveals that the most important element is electrical T/C. The most important element of operating and energy aspect were a container rehandling and a LED lighting. As for the whole priority which conversion weight was applied, the results were shown as follows: an electrical T/C(16.2%) as the first rank: a hybrid Y/T(14.4%) as the second rank: a AMP(10.6%) as the third rank. The result of this study suggests some guidelines for deciding priority of greenhouse gas reduction for container terminal.