• Communications for Statistical Applications and Methods
• /
• 제29권3호
• /
• pp.287-299
• /
• 2022

In radiation epidemiology, the excess relative risk (ERR) model is used to determine the dose-response relationship. In general, the dose-response relationship for the ERR model is assumed to be linear, linear-quadratic, linear-threshold, quadratic, and so on. However, since none of these functions dominate other functions for expressing the dose-response relationship, a Bayesian semiparametric method using splines has recently been proposed. Thus, we improve the Bayesian semiparametric method for the selection of the tuning parameters for splines as the number and location of knots using a Bayesian knot selection method. Equally spaced knots cannot capture the characteristic of radiation exposed dose distribution which is highly skewed in general. Therefore, we propose a nonparametric Bayesian knot selection method based on a Dirichlet process mixture model. Inference of the spline coefficients after obtaining the number and location of knots is performed in the Bayesian framework. We apply this approach to the life span study cohort data from the radiation effects research foundation in Japan, and the results illustrate that the proposed method provides competitive curve estimates for the dose-response curve and relatively stable credible intervals for the curve.

• 환경영향평가
• /
• 제6권2호
• /
• pp.137-152
• /
• 1997

The siting process of municipal solid waste treatment facility consists of a structured set of policies that guide the implementation of waste management goals. The main problems of siting process are the social and political context or the community opposition. During the past, the traditional siting process has been obsolete in most pans of the country, so public officials and researchers have tried to experiment with new policies and procedures. A number of controversial issues offer insight into the factors that are related to the local residents opposition to new waste treatment facilities. The purpose of this case study focused on the establishment of criteria in the site selection of waste treatment facilities which can carry out resources recovery. incineration and landfill simultaneously. That is to say. the main points are to make concrete the quantification standards of assignment and take an objective allotment scale according to the assessment factors. The summarized results are as follows; 1. To promote the site selection based on the guideline such as rational. objective and due process of law, it is desirable to inform the local residents the methods of assessment in advance. 2. Totally 20 factors for the site selection are divided into 3 categories such as living environment characteristics, technological location characteristics and socio-economic factors. And the supposed magnitude of weight in all items are equally applied. 3. In regard to 20 assessment factors, the allotment of point is distributed by the specific location characteristics. Namely to make the assessment easily, each factors are set the scale from 1 to 5 points en masse along the data which are acquired in the region.

• 상하수도학회지
• /
• 제38권2호
• /
• pp.69-81
• /
• 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.

• 한국경제지리학회지
• /
• 제10권2호
• /
• pp.223-238
• /
• 2007

전국의 10개 지역에서 건설되는 혁신도시(지구) 중에서 많은 광주와 전남의 공동혁신도시는 중앙부처 및 관련 전문가 집단으로부터 매우 모범적인 사례로 평가받고 있다. 이런 측면에서 본 연구는 광주시와 전남도가 공동으로 혁신도시를 건설하게 된 배경과 입지선정 과정에 나타난 특징을 고찰하는 것이다. 공동혁신도시 건설은 광주시장과 전남도지사의 리더쉽, 광주와 전남의 상생발전을 염원하는 지역주민의 사회적 합의, 공동혁신도시의 장점을 확산시킨 혁신주체들의 노력 등이 결합된 결과였다. 공동혁신도시의 입지선정과정은 광주전남지역혁신협의회가 추진주체가 되어 진행되었고, 입지선정위원회에서 나주시 금천지역이 제1순위로 선정되었다. 광주 전남의 신도시 건설구상은 성장거점의 기능과 역할 확대, 규모 경제의 확보와 도시자체의 자생력 확보, 건설비용 절감과 도시개발의 효율성 제고, 공공기관 종사자들에게 대한 유인책, 광주 전남의 공동발전에 미치는 효과, 공동의 지역발전을 위한 협력체제 구축 등이라는 측면에서 지역사회에서 중요한 의미를 갖게 될 것으로 기대된다.

• Nuclear Engineering and Technology
• /
• 제52권7호
• /
• pp.1587-1596
• /
• 2020

The location selection for nuclear power plants (NPP) is a strategic decision, which has significant impact operation of the plant and sustainable development of the region. Further, the ranking of the alternative locations and selection of the most suitable and efficient locations for NPPs is an important multi-criteria decision-making problem. In this paper, the non-sequential Monte Carlo probabilistic method and the Latin hypercube sampling probabilistic method are used to evaluate and select the optimal locations for NPP. These locations are identified by the power plant's onsite loads and the average of the lowest number of relay protection after the NPP's trip, based on electricity considerations. The results obtained from the proposed method indicate that in selecting the optimal location for an NPP after a power plant trip with the purpose of internal onsite loads of the power plant and the average of the lowest number of relay protection power system, on the IEEE RTS 24-bus system network given. This paper provides an effective and systematic study of the decision-making process for evaluating and selecting optimal locations for an NPP.

• 한국항만경제학회지
• /
• 제27권2호
• /
• pp.1-26
• /
• 2011

본 연구는 광양만권 친환경농산물의 물류센터 입지를 선정하기 위한 연구이며, AHP기법을 적용하여 입지선정요소를 검토하고, 객관적이고 정량화된 결정을 하기 위해 전문가 면담 및 설문지 조사를 통해서 요인계층화를 하였다. 광양만권 친환경농산물의 물류센터를 위한 입지요인의 계층화 과정은 크게 자연적요인, 경제적요인, 사회적요인, 유통 효율성, 국토이용관리계획 등으로 대분류하고, 대분류된 요인들을 다시 세부적으로 각각 3개의 요인으로 소분류하였다. 5가지 대분류를 쌍대 비교하여 분석한 결과, 경제적요인의 가중치가 가장 높았으며, 소분류된 요인들 중에는 물동량의 용이성, 상위계획과 적합성, 기후, 토지가격, 제한법규 등이 비교우위의 평가기준들로 나타났다. 이러한 과정을 통해 최종후보지의 우선순위가 결정되었으며, 자연적 요소 및 경제적 요소에서는 율촌2산단 지역의 가중치가 가장 높았고, 사회적 요소, 유통 효율성, 국토이용관리계획 등은 광양황금산단 지역의 가중치가 가장 높았다. 최종 분석결과, 광양만권의 친환경농산물 물류센터의 입지선정 최종후보지는 광양황금산단 지역이 가장 적합한 것으로 나타났다.

• 산업경영시스템학회지
• /
• 제42권4호
• /
• pp.23-30
• /
• 2019

Automobiles are largely divided into passenger cars with less than five passengers and commercial vehicles such as construction machines, trucks, mixers, special lorries, and large buses. Automobile maintenance companies are also divided into passenger cars and commercial vehicles. Because commercial vehicles are the livelihood vehicles of individual carriers engaged in cargo transportation, passenger transportation, and construction, fast and accurate maintenance is important. Access to the expressway is also important because the car is large and uses highways. In addition, the time required for troubleshooting is long, so sufficient space must be secured for parking the vehicle, and ease of entry and exit of the vehicle in the maintenance shop should be fully considered. For this reason, commercial vehicle maintenance companies have higher initial investment costs than car maintenance companies, and it is difficult to supply and maintain maintenance personnel. Therefore, it is necessary to carefully examine and analyze various related factors for successful commercial vehicle maintenance company selection. However, most existing commercial vehicle maintenance companies often choose their location based on the empirical judgment of the founder, the customs and the case, without a clear analysis. In this study, we show how to derive the location selection factors to be considered when establishing professional maintenance company for commercial vehicles and to select the optimal location by using AHP (Analytic Hierarchy Process) method.

• International Journal of Computer Science & Network Security
• /
• 제22권3호
• /
• pp.285-291
• /
• 2022

WSN is the major component for information transfer in IoT environments. Source Location Privacy (SLP) has attracted attention in WSN environments. Effective SLP can avoid adversaries to backtrack and capture source nodes. This work presents a Two-Level Randomized Sector-based Routing (TLRSR) model to ensure SLP in wireless environments. Sector creation is the initial process, where the nodes in the network are grouped into defined sectors. The first level routing process identifies sector-based route to the destination node, which is performed by Ant Colony Optimization (ACO). The second level performs route extraction, which identifies the actual nodes for transmission. The route extraction is randomized and is performed using Simulated Annealing. This process is distributed between the nodes, hence ensures even charge depletion across the network. Randomized node selection process ensures SLP and also avoids depletion of certain specific nodes, resulting in increased network lifetime. Experiments and comparisons indicate faster route detection and optimal paths by the TLRSR model.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
• /
• 제24권2호
• /
• pp.27-36
• /
• 2018

Purpose: In the case of mass disaster, the establishment of temporary medical facilities for the first aid and treatment is required for the stable accommodation of patients caused by the disaster. However, the criteria for decision making related to the deployment of field emergency medical facilities are not specified. So, The purpose of this study is to draw considerable factors needed for the deployment of field emergency medical facilities and to make proposal for site selection process of field emergency medical facilities on the basis of the factor. Methods: This study performs text mining of disaster-related laws, guidelines and documents to derive key factors affecting site selection, also proposes a decision making process and conducts virtual deployment to validate the process. Results: The key factors for the site selection derived as the size of the damage, the size of the DMAT inputs, the location of available place, and distance to the disaster base hospital. As a result of virtual deployment following proposed decision making process, It is confirmed that the site of field emergency medical facilities is changed depending on the type of disaster, even if the scope of the disaster damage was the same. Implications: The deployment of field emergency medical facilities requires a separate criteria for each type of disaster, not uniform, as a future research a quantitative approach of the criteria needs to be performed.

• Korean Journal of Geomatics
• /
• 제1권1호
• /
• pp.95-101
• /
• 2001

In a route plan, the route selection is a complicated problem to consider the spatial distribution and influence through overall related data and objective analysis on the social, economic and technical condition. The developed system in this study was compared and estimated by deciding a practical section for its validity and efficiency. Using Geographic Information System (GIS), the various information required for route selections in database was constructed, the characteristics of subject area by executing three-dimensional terrain analysis was grasped effectively, and the control point through buffering, overlay and location operation was extracted. An optimum route was selected by calculating the sum of alternatives to the sub-criteria weight, and from this result, there is a difference between real route and proposed route according to the prioritization of decision criteria based on the importance. This research could be constructed and applied geospatial information to the reasonable route plan and an optimum route selection efficiently using GIS. Therefore, the applications are presented by applying Analytic Hierarchy Process (AHP) to the decision-making of information needed in route selection.