• 한국GIS학회:학술대회논문집
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• 한국GIS학회 2003년도 공동 춘계학술대회 논문집
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• pp.77-82
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• 2003

The purpose of this study is to develop landslide susceptibility analysis techniques using artificial neural network and to apply the developed techniques to the study area of janghung in Korea. Landslide locations were identified in the study area from interpretation of satellite image and field survey data, and a spatial database of the topography, soil, forest and land use were consturced. The 13 landslide-related factors were extracted from the spatial database. Using those factors, landslide susceptibility was analyzed by artificial neural network methods, and the susceptibility map was made with a e15 program. For this, the weights of each factor were determinated in 5 cases by the backpropagation method, which is a type of artificial neural network method. Then the landslide susceptibility indexes were calculated using the weights and the susceptibility maps were made with a GIS to the 5 cases. A GIS was used to efficiently analyze the vast amount of data, and an artificial neural network was turned out be an effective tool to analyze the landslide susceptibility.

• 한국수소및신에너지학회논문집
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• 제20권1호
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• pp.79-85
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• 2009

In this paper, we investigated impact factors by brainstorming and survey research and calculated the weights of them using the Analytic Hierarchy Process(AHP) method in order to evaluate alternatives for supplying Liquefied Natural Gas(LNG). AHP is a useful method for evaluating multi-criteria decision making problems. We selected 3 criteria and 9 sub-criteria. According to the result in this study, the most important sub-criterion is the Government's Policy, and the second is the Province's Policy. The other side, the lowest important sub-criterion is the Investment Cost. This study may provide basic data to select the optimal alternative for supplying LNG.

• 한국안전학회지
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• 제32권5호
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• pp.103-114
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• 2017

The landslide disaster damage has been increased by mountain development, leading to construction of educational facilities, medical facilities, petty industrial facilities, and large housing complexes. Therefore, effective regulation is required as an effort in urban planning solutions. For suggesting specific mitigation strategies on urban landslide, this study aims to define evaluation criteria for urban planning management of debris-flow disaster. AHP (Analytic Hierarchy Process), one of the multiple criterion decision making methods, was utilized in this study. This study makes use of 16 sub-criteria under the framework of hazard, exposure, and vulnerability, and well-planned expert survey measures their weights. The weights are also applied to evaluate each grid in urban space (min $10{\times}10m$) and classify it with red, orange, yellow, or green grade so that areas at higher risk are clearly identified. This study concludes that the suggested method is useful to support a strategies for urban planning management of debris-flow disaster, particularly in a GIS base.

• 수산해양교육연구
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• 제25권1호
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• pp.78-86
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• 2013

In order to analyze the pollution extent of small plastic debris(SPD) ashore on the shoreline of coastal flow, 12 of survey was conducted at Song-Jung beach of Busan for several years. The sampled beach was divided into 9 sites with unit area($m^2$). Many of SPD were detected in the southern part of the beach and classified into 11 items as P1 to P11 according to the contents. Average densities of total items' weight were $2.955g/m^2$ and weights of P2, P3 item were composed of about 64% among them. And average densities of total items' quantity were $56.259ea/m^2$ and quantities of P6 only were composed of about 63%. Seeing the seasonal variation, fall season was abundant extremely whereas nearly nothing in spring. The correlation of weights and quantities have reliable coefficients to some extent on sites and season but nearly don't have reliances on item, tide, wind and precipitation. Many researching data were required if possible in order to discussing about the correlation.

• 한국과학교육학회지
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• 제12권1호
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• pp.103-118
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• 1992

Quality control of science teachers seems to be one of the most important tasks to improve the quality of science education in Korea. The purposes of this study, as a survey, were to identify characteristics of good science teachers and to make an outline of preservice teacher education curriculum for cultivating the characteristics from inserivce secondary science teachers. A questionnaire was developed for this study and distributed to 176 inservice teachers. It had three parts: 1) characteristics of good science teachers, 2) weights of preservice curriclum areas, and 3) weights of college courses. The means and standard deviations of teachers' responses were calculated. To test the differences between teacher variables, t-tests were executed. The inservice teachers perceived that the junior-high school teacher's characteristics should be different from the senior-high school teacher's. Characteristics, such as enthusiasm toward teaching or students, subject knowledge, content selection and organizing skill, teaching techniques, and scientific worldview were ranked within top five of good science teacher's chracteristics. The teachers' perception about preservice curriculum were as follows: 1) present weight of liberal arts area should be reduced: 2) weight of content area for junior-high school teachers should be different from that for senior-high school teachers: 3) present weight of pedagogy area should be increased: 4) present weight of science education area should be increased: and 5) many courses in pedagogy and sciencd education areas need to be changed, Based on the data and disussion, a conceptual model for preservice teacher education curriculum was proposed.

• 설비공학논문집
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• 제23권8호
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• pp.580-586
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• 2011

In this study, 3 cooling systems of apartment which are air-cooled air conditioner with indoor unit, water-cooled air conditioner with indoor unit and small capacity absorption chiller-heater with FCU have been evaluated by Multi-Criteria Decision Making Analysis. Weights of 7 selected factors which are economics, space, billing, constructability, human comfort, visibility and reliability are determined by expert group of 30 system designers and 30 construction engineers. Final weights were derived for 101 and 166 $m^2$ apartments. Analysis shows that small capacity absorption chiller-heater with FCU is the most favorable system for apartment cooling system.

• 항공우주시스템공학회지
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• 제8권4호
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• pp.1-6
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• 2014

This paper presents the trade-off study of conducting a survey of the weights for various kind of propulsion systems installed in the Smart Unmanned Aerial Vehicle TR-100, a tilt-rotor vehicle, which is developed by Korea Aerospace Research Institute, in order to predict the appropriate propulsion system for present and future Personal Air Vehicle, which has single mode and vertical take-off & landing. In order to perform the trade-off study, we set the requirements that the vehicle hovers for 1 hour with 1,000 kg maximum take off weights. In this study, the power systems are classified engine, which uses the fossil fuel - turboshaft engine, piston engine, diesel engine and rotary engine, and electric motor with fuelcell or Li-Ion battery. The results of trade-off study shows the power systems using fossil fuel are superior to using fuelcell or Li-Ion battery for weight of propulsion system. Also turboshaft engine is the best power system for the aspects of system weight, and the nexts are rotary engine, piston engine, diesel engine, electric motor with Li-Ion battery, and electric motor with fuelcell.

• 한국정보처리학회논문지
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• 제4권7호
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• pp.1706-1718
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• 1997

다양한 소프트웨어 제품의 급격한 증가로 인하여 소프트웨어 제품의 평가·선정을 위한 체계적이고 객관적인 방법이 필요하게 되었다. 본 연구에서는 소프트웨어 제품의 효과적 평가·선정을 위해 평가 과정의 핵심인 가중치 부여와 모형의 선정에 중점을 둔다. 이를 위해 첫째, 계층적 분석 과정을 이용하여 평가 속성에 일관적 가중치를 부여한다. 둘째, 소프트웨어 제품의 선정 문제의 성격에 알맞은 모형을 조사${\cdot}$분류하여 모형별 장${\cdot}$단점을 분석한다. 적용 모형은 4개의 보상모형과 7개의 비보상모형으로 구성되어 있다. 선정된 모형은 특정 소프트웨어 제품(데이터베이스 모델러)에 응용되어 모형별로 제품을 평가한다. 본 연구는 가중치 부여 및 모형의 장·단점 분석과 응용 절차를 통하여 사용자의 다양한 요구사항에 대한 모형의 적용성을 제고하고자 한다.

• 약학회지
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• 제52권3호
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• pp.176-181
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• 2008

Stomach cancer shows the highest incidence among cancer patients in Korea and it deteriorates the patients' health-related quality of life considerably. This study measured utility weights of severe stomach cancer symptoms using VAS (Visual Analogue Scale), TTO (Time-trade Off) and EQ-5D (EuroQol-5 Dimension) methods. A survey questionnaire was developed to describe the symptoms of severe stomach cancer comprehensively and concisely using VAS, TTO and EQ-5D. A face-to-face interview was conducted for 21 cancer inpatients in a hospital and 25 non-patients. The mean utility weight is 0.498 for VAS, 0.375 for EQ-5D and 0.300 for TTO. Using VAS or TTO methods, there were no statistically significant differences between patients and non-patients while there was significant difference in EQ-5D. The utility weight with VAS and EQ-5D has shown similar trend - higher score in patient group, male and aged while it has opposite trend with TTO.

• 농촌계획
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• 제28권1호
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• pp.27-35
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• 2022

This study aims to establish the indicator system of the quality of life of rural residents and to estimate the weights among criteria or sub-criteria that constitute the indicator system of the quality of life using AHP(Analytic Hierarchy Process) method. Indicator system consists of four criteria, that is, health care, eduction & culture, living environment, and income and jobs. Each criterion include three sub-criteria that make up corresponding criterion. The results show that income and jobs was most highly evaluated among the four criteria. It was followed by health care, living environment, and eduction & culture. Among the total 12 sub-criteria, annual income was most highly evaluated, followed by medical service level, job satisfaction, and public transportation environment in terms of global weight which was deduced from expert questionnaire survey. This study implies that rural development policy needs to focus on increasing rural residents' income by creating good quality occupations and increasing the level of medical services, and expanding public transportation services in rural areas. This study has failed to collect local residents' opinions regarding their quality of life in spite of the efforts to reflect the opinions from various expert groups, which is the limitation of this study.