• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.61-64
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• 2005

The purpose of this paper is to take a closer look at an area having shorted emergence facilities and to determine optional candidate sites instead of vulnerable area by using GIS spatial analysis. Newly determined new candidate is performed by concerning spatial efficiency and spatial equity for a public service. It was determined through using the analyzing of the physical accessibility measure, the Location-Allocation, sort of classic model in spatial statistics and general network analysis. The area of this research has been used in administrative boundary of Young-Dong in Gangneung including 13 emergency, medical hospitals, 46 fire-stations and sub-fire stations. In general terms, what all this show is that the way we are approached for geographical view from using GIS spatial analyzing technique of determined location and allocation problem by the social, economical, political factor and simple administrative discrimination at the meantime. At the same time, with problem occurred in the space it is possible to make an Effective proposal or means, policy, decision for new candidate location-allocation suggesting optimum model.

• 한국농촌건축학회논문집
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• 제9권3호
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• pp.1-10
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• 2007

This study aims to discuss the location characteristics and present distribution of facilities in the rural community. The purpose of this study is to suggest the basic data of the planning of facilities corresponding to the living sphere in community. The circumstances, location and distribution of the rural area facilities was analyzed through field investigation and interview. lt is necessary for ameliorating the income of inhabitants and the status of living environment to make a general local plan in developing rural area. That will be a solution to tackle the decreasement of population in the rural area. The survey's result is observed different by the feature of rural area, adjacence with near rural center, scale of rural center. So a standard of the various facility's arrangement plan must be established, and it must be enlarged in rural area.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권10호
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• pp.3438-3457
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• 2022

As location-based services (LBS) are widely used in vehicular ad-hoc networks (VANETs), location privacy has become an utmost concern. Spatial cloaking is a popular location privacy protection approach, which uses a cloaking area containing k-1 collaborative vehicles (CVs) to replace the real location of the requested vehicle (RV). However, all CVs are assumed as honest in k-anonymity, and thus giving opportunities for dishonest CVs to submit false location information during the cloaking area construction. Attackers could exploit dishonest CVs' false location information to speculate the real location of RV. To suppress this threat, an edge-assisted Trusted Collaborative Anonymity construction scheme called TCA is proposed with trust mechanism. From the design idea of trusted observations within variable radius r, the trust value is not only utilized to select honest CVs to construct a cloaking area by restricting r's search range but also used to verify false location information from dishonest CVs. In order to obtain the variable radius r of searching CVs, a multiple linear regression model is established based on the privacy level and service quality of RV. By using the above approaches, the trust relationship among vehicles can be predicted, and the most suitable CVs can be selected according to RV's preference, so as to construct the trusted cloaking area. Moreover, to deal with the massive trust value calculation brought by large quantities of LBS requests, edge computing is employed during the trust evaluation. The performance analysis indicates that the malicious response of TCA is only 22% of the collaborative anonymity construction scheme without trust mechanism, and the location privacy leakage is about 32% of the traditional Enhanced Location Privacy Preserving (ELPP) scheme.

• 한국통신학회논문지
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• 제33권1B호
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• pp.1-7
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• 2008

그룹 위치 관리에서는 복수의 이동 가입자(MS: mobile subscriber)가 승차하고 있는 운송 시스템(TS: transportation system)이 위치 영역(LA: location area)을 변경시, MS의 개별 위치 등록 없이 TS의 그룹 위치 등록만을 통해 위치 관리를 수행한다. 기존의 연구에서는 대부분 그룹 위치 관리의 LA를 개별 위치 관리의 LA와 동일하게 가정하고 있으나 승차상태의 MS들은 이동 속도나 총 착신호 도착률의 관점에서 하차상태의 MS와 다른 특성을 가지고 있어 동일한 크기의 LA를 가정하는 것은 적절하지 않다. 이에, 본 논문에서는 서로 다른 크기의 LA를 가지는 개별 및 그룹 위치관리에 기반한 효과적인 위치 관리 기법을 제안하고, 그 성능을 무선 구간에서 신호 비용의 측면에서 분석하였다. 분석 결과 제안 기법은 그룹 위치 관리를 위한 적절한 크기의 LA를 선택함으로써 기존 기법보다 우수한 성능을 가지게 됨을 보였다.

• 보건행정학회지
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• 제9권3호
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• pp.21-32
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• 1999

The purpose of this study is to assess individual decisive factors for distribution of medical specialists in Korea. A data set was constructed using several published data sources. including the Korean Medical Association's physician master file as a principal source for physician information. Linear logistic regression analysis was performed to assess the relationship between the location of private specialist clinic for practice with six variables related with individual characteristics: age. sex. location of postgraduate training hospital. location of medical school graduated, size of hospital for training, and specialty. Analysis showed that location of practice. classified into urban and rural areas, was significantly associated with the variables of sex. location of postgraduate training hospital. location of medical school. In addition, significant association was found between the location of practice which was categorized into "near-Seoul area" and others, and sex, location of postgraduate training hospital. and location of medical school. We could conclude that to improve area maldistribution of physicians locations of hospitals for training and medical schools have to have the highest priority in the policymaking.icymaking.

• 컴퓨터교육학회논문지
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• 제8권6호
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• pp.123-132
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• 2005

이동망의 위치관리에서 위치갱신 비용 최소화를 위한 많은 연구 결과들이 있다. 위치갱신 비용의 최소화를 위해서는 각 사용자들의 이동 패턴을 고려해야만 한다. 본 논문은 과거의 사용자 이동에 대한 이력으로부터 각 사용자에 대한 위치영역 리스트 생성과 이를 위한 3 단계 페이징 방안을 제안한다. 사용자의 이동은 공간적으로 뿐만 아니라 시간적으로도 규칙적인 패턴이 존재한다. 따라서 제안된 위치영역 리스트 생성방안은 이상의 2가지 측면에서 사용자의 방문빈도를 이용하여 규칙성을 발견하고, 이에 대한 위치영역리스트를 생성한다. 제안된 방안의 성능분석 위해서 제안된 방안에 대하여 사용자 이동 패턴을 고려한 모의실험을 수행하였다. 모의실험 결과 제안된 방안이 위치관리 비용 측면에서 장점이 있음이 확인되었다.

• 대한방사선기술학회지:방사선기술과학
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• 제45권5호
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• pp.407-412
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• 2022

Cerebral aneurysm coil embolization has the advantages of accurate, low patient burden, and fast recovery time, but efforts are needed to reduce dose due to the burden of exposure radiation dose during interventional procedures. In this study, the area dose product(DAP/Gy·cm²) and fluoro time(min) according to the size of the aneurysm and the location of aneurysm were investigated according to insurance recognition regulations aneurysm classification cerebral aneurysm coil embolization. According to the research method, classification according to the size and location of the aneurysm is first, the size of the aneurysm is divided into less than 4mm, more than 4mm to less than 8mm, and more than 8mm, and second, the dose to the area based on the location site (DAP/Gy·cm²) and fluoro time(min) based on the location site were observed. As a result, the location of the cerebral aneurysm procedure was found to be the Paraclinoid site. During cerebral aneurysm coil embolization, the area dose was 107 Gy·cm² and fluoro time was 47.41 minutes, showing lower results than domestic studies, and when comparing the area dose product with foreign studies, the area dose product results were similar to that of Turkey and Saudi Arabia. It is expected that it can be used as an objective analysis indicator to establish diagnostic reference levels (DRLs) and patient radiation defense guidelines according to the size of cerebral aneurysm and location of cerebral aneurysm procedures during interventional procedures.

• 한국경제지리학회지
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• 제20권2호
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• pp.173-188
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• 2017

본 연구는 수도권, 부산 경남 및 대구 경북 지역에 거주하는 가구를 대상으로, 가구의 거주지역 및 인적 특성요인이 주거입지 선호에 미치는 영향을 분석하는 것이다. 연구결과를 요약하면 다음과 같다. 첫째로, 가구의 거주지역 및 인적 특성요인이 개별 주거 입지요인의 선호도에 미치는 영향에 대한 다중회귀분석 결과를 통해, 개별 입지요인별로 가구의 거주지역 및 인적 특성에 따라 입지요인의 선호도가 차별적으로 나타나고 있음을 확인할 수 있었다. 둘째로, 주거 입지요인이 가구의 거주지역 및 인적 특성에 미치는 영향에 대한 이항로짓분석 결과를 통해, 역시 가구의 거주지역 및 인적 특성에 따라 선호하는 입지요인이 차별적임을 확인할 수 있었다. 따라서 가구의 거주지역 및 인적 특성과 입지요인은 상호적으로 영향을 미치고 있으며, 각각의 특성에 따라 차별적인 영향을 주고 받는 것으로 판단된다.

• 지역연구
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• 제14권1호
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• pp.91-107
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• 1998

Waste disposal problem is one of the most important social welfare indicators in urban area, because the volume of waste generated from urban area is remarkable. So far most waste of Seoul has been disposed at landfills. However, this landifill disposal method is confronted with several difficulties in recent. As public concern on environmental problem increases and autonomy system is settled down, local community people of the landfills refuse to receive the waste produced other places any more. It brought reginal confliction problem between waste sending and receiving by refusing to accept waste from certain region. Furthermore, it is difficult to find another place to fill up the waste, while the existing landfiis is reached at the limit in the near future. In terms of environmental aspects landfill method is not the best way to dispose waste. It contaminates the soil and ground/underground water by leaking water containing many serious pollutants as well as offensive oder. In terms of equity, this waste disposal method is not fair. Environmental pollution causes damage to residence near to the landfills, while the waste produced other places. In order to satisfy the equity aspect, the waste generated a region should be disposed within the region. Incineration of Waste has been provided as the alternative. Government plans to construct waste incinerator in every anatomy, so the waste produced by local community is disposed within their local autonomous area. However, the location decision is not easy, since waste incinerator is one of the facilities to the community people. We can not apply the existing location models for this problem, because they show strong NIMBY phenomenon for the location. The location of waste incinerator should be determined very carefully with consideration of various location factors and criteria. This study proposes a methodology for determining the location of the waste incinerators by utilizing GIS, which is a power research tool for location decision where various geographical factors related. We drive the location factors which should be considered in the determination of waste incinerators. They involve environmental, socio-economic, and institutional factors. In first, we eliminate the area which is located within the environmental location criteria such as slope, fault line, distance to river, and then eliminate ares which is conflict with the social and institutional criteria.

• 전자공학회논문지T
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• 제35T권2호
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• pp.81-85
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• 1998

이동통신망에서 이동국이 등록지역을 이동할 때마다 위치등록 및 위치등록취소가 요구된다. 이동국이 등록지역을 벗어날 때 등록을 취소시키는 몇가지 방법을 조사한 후 등록취소로 인하여 부가되는 통신망의 트래픽을 제거할 수 있는 등록취소 방법을 선택하였다. 그러나 이 기법은 유효한 등록 기록을 삭제시킬 수 있으므로 위치등록 데이타베이스의 크기는 유효한 등록기록이 삭제되는 확률이 낮도록 충분히 크게 해야 한다. 본 논문은 이러한 등록취소 기법에서 위치등록을 위한 데이타베이스 크기를 결정하는 분석 모델을 설명하였다. 분석 모델의 모의실험 결과 데이타베이스의 크기는 위치등록지역에 예상되는 이동국의 수에 비해 3-5배 정도가 되어야 하는 것을 알 수 있었다.