• Journal of Information Processing Systems
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• 제13권6호
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• pp.1602-1612
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• 2017

Since rapidly disseminating of Internet of Things (IoT) as the new communication paradigm, a number of studies for various applications is being carried out. Especially, interest in the smart medical system is rising. In the smart medical system, a number of medical devices are distributed in popular area such as station and medical center, and this high density of medical device distribution can cause serious performance degradation of communication, referred to as the coexistence problem. When coexistence problem occurs in smart medical system, reliable transmitting of patient's biological information may not be guaranteed and patient's life can be jeopardized. Therefore, coexistence problem in smart medical system should be resolved. In this paper, we propose a distributed coexistence mitigation scheme for IoT-based smart medical system which can dynamically avoid interference in coexistence situation and can guarantee reliable communication. To evaluate the performance of the proposed scheme, we perform extensive simulations by comparing with IEEE 802.15.4 MAC protocol which is a traditional low-power communication technology.

• 농촌계획
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• 제16권2호
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• pp.1-10
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• 2010

This study aimed to systematically adjust rural area development projects that have been carried out by a variety of government departments for activation of rural areas and overcome inefficient problems caused by the policies and projects promoted separately. As its alternative, this study aimed to explore efficient improvement scheme of rural villages associated with various projects. Major agriculture/rural policies and projects that have been promoted were classified by the target space of the policies and projects as Environment space, living space, and production space. Each space was categorized into five sub-items without duplication. By assessment results of rural area improvement level and preference by Analytic Hierarchy Process(AHP) method, maintenance of rural areas was classified into four types. And outer space structure was analyzed by using Space Syntax Method(SSM). Based on the analysis result above, facilities for improvement of rural villages were placed around representative facilities. Facility allocation was based on selection and concentration in terms of facility maintenance and on type attributes in terms of spatial aspects. And finally, alternatives schemes for setting up the basic direction of improvement of rural villages are local area characteristics and environmentally conscious business plan.

• 농촌계획
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• 제11권1호
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• pp.45-53
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• 2005

This study aims to suggest a rural village development policy considering tourists' stay pattern and villages' resources which can be infrastructure for green-tourism. For this purpose, a relationship table between amenity resources and the stay pattern was developed as a guide line to combine a set of several facilities fer village renewal. The amenity resources system was classified into three sub-classes(social, industrial, and natural/cultural/historical resources) and a relationship diagram between three classes and tourists' behavior was also defined. The table and diagram were applied to make renewal plan for 40 rural villages of the study area, Bukmyun, Cheonan, Chungnam province, so that the development scheme for the villages was suggested reasonably by the new findings of this study.

• 대한안전경영과학회지
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• 제23권1호
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• pp.31-38
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• 2021

port is the intersection of highway, railway, waterway and other transportation modes, and is the key to realizing integrated transportation. There are many excellent ports around the Tumen River Region. With the obvious location advantages, Tumen River Region is an important part of Tumen River regional cooperation and development, and is the key to realizing the "borrow port to sea", which is raised in "China Tumen River regional cooperation and development planning outline -- regard Changjitu area as the development and opening leading area" (referred to as "planning outline"). This paper focus on the main ports in the Tumen River region, taking them as the research object. Furthermore, the paper makes the strategic plan for the port cluster in the Tumen River region as well as puts a collaboration scheme is proposed by analyzing the research reviews of the Tumen River region and the present situations of the main ports.

• Spatial Information Research
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• 제22권5호
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• pp.99-107
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• 2014

연안관리 계획은 연안을 이용방향에 따라 4개의 구역으로 분류하도록 하고 있는데, 각 구역별 연안이용행위의 금지 및 지원사항을 정하도록 하고 있다. 연안구역을 설정할 경우 해당지역이 국토이용계획 및 도시계획에 따라 지역 및 지구로 이미 지정되어 있어 추가적인 구역 설정시 이 같은 점이 중요한 검토기준이 되기도 하지만 경우에 따라서는 상충되는 결과를 초래할 수도 있다. 따라서, 연안관리에 있어서의 범위와 이용구역의 설정에 대한 검토 요소를 분석하고, 기존의 지역 지구지정 현황과의 상충문제 해결을 위한 방안을 도출하기 위한 노력이 필요하다. 보다 정확하고 효율적인 연안관리를 위해 해양에서의 해양공간계획과 토지에서 활용되는 도시계획제도와 지적제도를 활용하여 연안지역을 등록 관리할 필요성이 있다. 이를 위해 국토이용계획, 해양공간계획 등을 종합한 계획을 수립할 수 있는 별도의 협의체 기관 검토, 다른 개별법이 정하고 있는 각종 구역 지역의 지정 상충 검토, 연안해역의 범위 설정(3해리 내), 연안등록 방안 및 등록 대상 등을 모색하였다.

• 재활복지
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• 제21권2호
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• pp.29-62
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• 2017

본 연구는 성인기 발달장애인의 소득보장과 재산의 보호 및 관리 수단으로서 신탁을 사회복지의 측면에서 연계, 활용하기 위한 "재정계획"과 발달장애인 "신탁"의 주요 운영방안을 모색하고자 하였다. 연구결과 "재정계획"의 운영내용과 관련하여 (1)필요성은 "미래계획을 수립하는데 있어 필요한 재원을 충족시키는 방안 수립", "부모가 살아있는 동안 사후 장애자녀에게 남길 재산에 대한 안전한 관리 방안 수립"이었다. (2)구성내용은 "자립 시 재산 유지 및 사용 방안", "미래에 대한 계획과 꿈", "부모 사후 시 발달 장애인을 위한 유언 및 유산처리 방안" 등 이었으며 (3)장애요인은 "장애인의 재정계획에 대한 국가의 인식부족", 지원의 내용은 "개인의 소득보장과 재산을 관리해줄 수 있는 공신력 있는 기관" 등으로 나타났다. 발달장애인을 위한 "신탁" 운영내용과 관련하여 (1)운영 원칙은 "보편성, 공공성, 안정성, 자기결정, 개별성 보장"이었고, (2)"운영체계는 공공과 민간의 혼합방식", (3)대상자 유형은 "부모가 없거나 돌볼 가족이 없는 장애인으로 당사자의 소득이 있거나 재산을 가진 경우", (4)필요한 지원은 수탁기관에 대한 "재산의 안전한 관리를 위한 관리 감독 시스템", "발달장애인을 위한 의사결정지원 시스템", "일정한도의 신탁재산이 있어도 공적 부조(기초생활수급자, 의료보호 등)의 정부수급 자격의 유지" 등으로 나타났다.

• International Journal of Control, Automation, and Systems
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• 제5권6호
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• pp.674-680
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• 2007

The probabilistic roadmap (PRM) method, which is a popular path planning scheme, for a manipulator, can find a collision-free path by connecting the start and goal poses through a roadmap constructed by drawing random nodes in the free configuration space. PRM exhibits robust performance for static environments, but its performance is poor for dynamic environments. On the other hand, reinforcement learning, a behavior-based control technique, can deal with uncertainties in the environment. The reinforcement learning agent can establish a policy that maximizes the sum of rewards by selecting the optimal actions in any state through iterative interactions with the environment. In this paper, we propose efficient real-time path planning by combining PRM and reinforcement learning to deal with uncertain dynamic environments and similar environments. A series of experiments demonstrate that the proposed hybrid path planner can generate a collision-free path even for dynamic environments in which objects block the pre-planned global path. It is also shown that the hybrid path planner can adapt to the similar, previously learned environments without significant additional learning.

• 제어로봇시스템학회논문지
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• 제15권12호
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• pp.1232-1239
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• 2009

This paper proposes an exploration strategy to efficiently find a specific place in large unknown environments with wall-following based path planning. Many exploration methods proposed so far showed good performance but they focused only on efficient planning for modeling unknown environments. Therefore, to successfully accomplish the room finding task, two additional requirements should be considered. First, suitable path-planning is needed to recognize the room number. Most conventional exploration schemes used the gradient method to extract the optimal path. In these schemes, the paths are extracted in the middle of the free space which is usually far from the wall. If the robot follows such a path, it is not likely to recognize the room number written on the wall because room numbers are usually too small to be recognized by camera image from a distance. Second, the behavior which re-explores the explored area is needed. Even though the robot completes exploration, it is possible that some rooms are not registered in the constructed map for some reasons such as poor recognition performance, occlusion by a human and so on. With this scheme, the robot does not have to visit and model the whole environment. This proposed method is very simple but it guarantees that the robot can find a specific room in most cases. The proposed exploration strategy was verified by various experiments.

• 한국조경학회지
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• 제27권5호
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• pp.94-106
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• 2000

The purpose of this study is to provide the basic data for planning and designing Village Parks in Seoul in the future, which result from analyzing post-occupancy evaluation. For conducting this study, 10 Village Parks among 45, built between 1996 and 1997, were selected and analyzed. The results of this study are as follows. The degree of satisfaction of 10 Village Parks in Seoul has been evaluated on a scale of 10, to be a 6.68 average. This result means that the most respondents are satisfied with the existing Village Parks in Seoul. The correlation of the degree of satisfaction with major planning factors for 3 types of Village Parks shows that accessibility is the most important factor. As for future directions of planning and designing Village Parks, many kinds of sitting, leaning and resting place need to be provided. It is also necessary to improve the visual quality of the parks with various spatial elements. The research also shows that various facilities for people's use should be provided in Village Parks.

• 한국군사과학기술학회지
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• 제24권1호
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• pp.61-69
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• 2021

Recently, autonomous navigation technology is actively being developed due to the increasing demand of an unmanned surface vehicle(USV). Local planning is essential for the USV to safely reach its destination along paths. the dynamic window approach(DWA) algorithm is a well-known navigation scheme as a local path planning. However, the existing DWA algorithm does not consider path line tracking, and the fixed weight coefficient of the evaluation function, which is a core part, cannot provide flexible path planning for all situations. Therefore, in this paper, we propose a new DWA algorithm that can follow path lines in all situations. Fixed weight coefficients were trained using reinforcement learning(RL) which has been actively studied recently. We implemented the simulation and compared the existing DWA algorithm with the DWA algorithm proposed in this paper. As a result, we confirmed the effectiveness of the proposed algorithm.