멀티캐스팅을 지원하는 프록시 모바일IPv6 네트워크에서 빠른 도메인간 핸드오버 기법의 분석적 접근법

유세원,정종필,Yoo, Se-Won,Jeong, Jong-Pil 한국정보처리학회 2012 정보처리학회논문지 C : 정보통신,정보보안 Vol.19 No.2

모바일 네트워크에서 멀티캐스트서비스의 이용량 증가로 MN(이동단말)에게 끊김없이 멀티캐스트 서비스를 전송하는 통신이 중요한 통신 형태가 요구될 것이다. 본 논문에서 IETF에서 표준화가 진행중인 PMIPv6(Proxy Mobile IPv6)에서 MLS(Multicast Listener Support)에 대한 현재의 문제점을 지적하고, 네트워크 기반의 이동성관리 기법인 PMIPv6 네트워크에서 도메인간 고속 멀티캐스트 핸드오버 절차를 제안한다. 제안된 도메인간 고속 멀티캐스트 핸드오버 절차에서는 MN의 컨텍스트를 사용하여 멀티캐스트 관리를 최적화한다. 제안된 고속 멀티캐스트 핸드오버 절차를 기본적인 것과 해석 모델링을 통하여 비교분석하고, 도메인간 핸드오버의 경우에 제안된 도메인간 고속 멀티캐스트 핸드오버 절차가 기본적인 것과 비교하여 서비스 단절 시간과 전체 네트워크 오버해드가 상당히 감소한다는 것을 보여준다. Multicast service will be required to be an important form of communication without interruption to the delivery of multicast service in mobile networks increasing MNs. In this paper, we review current status of PMIPv6(Proxy Mobile IPv6) multicast listener support being standardized in the IETF and point out limitations of the current approach and we proposed a fast multicast handover procedure in inter domain PMIPv6 network of network-based mobility management. The proposed Fast multicast handover procedure in inter domain optimizes multicast management by using the context of the MNs. We evaluate the proposed fast multicast handover procedure compared to the based one through the developed analytical models and confirm that introduced fast multicast handover procedure provides the reduced service interruption time and total network overhead compared to the based one during handovers.

기성복의 현황을 중심으로 한 의복연구

이주현,이영경,유세원 연세대학교 생활과학대학 1982 婦學 Vol.15 No.-

Analysis on the Causes and Characteristics of Child Loss through Surveys

최재필,최소영,유세원,한규빈 대한건축학회 2022 Architectural research Vol.24 No.3

Since lost child occurs frequently around us and there is a possibility of leading to an accident or a crime subsequently, it is necessary to study and have a plan for preventing child loss in advance. However, the preceding studies do not systemize the causes of child loss by places or situations, and the policy focuses only on the countermeasures afterward instead of prevention. In such perspective, this study derived the causes of child loss through the analysis of 202 cases by the bottom-up method. In addition, the causes were analyzed by dividing them into as negligence of guardian, breakaway of child, and environmental characteristics. As a result, it is found that children get lost by complex reasons usually with two or three causes combined together. And children got lost when guardians were not able to pay attention to their children, or when children moved away from their guardians. Furthermore, the environmental characteristics act as the catalyst by arousing child loss or making it more difficult for guardian to find the lost child. As a fundamental research, this study may be helpful in developing a environmental design certification system for preventing child loss in advance.

복합상업시설에서의 아동 동반 고객 행태분석을 통한 미아 발생원인 고찰

최재필,최소영,유세원,한규빈 대한건축학회 2020 대한건축학회논문집 Vol.36 No.1

Although the number of child loss in commercial facilities has been growing recently, the prevention method for child loss are still lackingin the environmental aspect. This research examines the causes of lost child in behavioral aspects in order to develop a guideline to preventchild loss in U.E.C. The observational study on the behaviors of guardians and children was conducted in the U.E.C that is visited bymany customers accompanied with children. Then the results of the observational study were marked on the behavioral maps. After analyzingthe behavioral maps, the causes of child loss were determined by classifying into behaviors by age and behaviors by functional space. As aresult, when guardian is unable to pay attention to child by doing something else such as making a purchase, or an inquiry, child may loseguardian by going towards the interesting factors or playing around. Moreover, if the spaces related to children are located at the node withhigh pedestrian density and open structure or the environment that is hard for the guardians to watch over their children, it will be easy forguardians to be inattentive to their children, and get separated from each other. 최근 들어, 상업시설 내에서 아동이 미아가 되고 사고로 이어지는 일이 증가하고 있지만, 환경적인 측면에서의 미아방지대책은 부족한 실정이다. 따라서 본 연구에서는 복합상업시설 미아방지 환경설계 가이드라인을 개발하기 위한 기초연구로서, 행태적 측면에서의 미아 발생원인을 고찰하였다. 이를 위해, 아동 동반 이용객이 많은 복합상업시설에서 보호자 및 아동의 행태관찰조사를 실시하였고, 행태지도로 작성하였다. 그리고 그 결과를 ‘연령별 이용객 행태’와 ‘기능적 공간별 이용객 행태’로 구분하여 미아 발생원인을 고찰하였다. 그 결과, 보호자가 구매, 문의 등 다른 일을 하면서 아동에게 주의를 기울이지 못할 때, 아동이 인근의 ‘흥미요소를 보고 이동’하거나 ‘놀이’를 하면서 보호자를 이탈하면 미아가 될 수도 있는 것으로 판단된다. 또한 아동 관련 공간이 보행밀도가 높은 결절점에 위치해있고 개방적인 구조로 이루어져 있으며 보호자의 아동관찰 또한 어려운 환경이면, 보호자 부주의 및 아동 이탈이 발생하기 쉬운 것으로 보인다.

복합상업시설 미아방지 환경설계 가이드라인 개발

최재필,최소영,한규빈,유세원 대한건축학회 2020 대한건축학회논문집 Vol.36 No.6

As a result of the recent growth in children’s spaces in urban entertainment centers targeting family customers, the concerns on child losshas been increasing as well. This research develops a guideline to prevent child loss in advance through the environmental design in urbanentertainment centers. The guideline was prepared by reviewing literatures in order to determine the planning factors and environmentalfactors that prevent child loss in urban entertainment centers. In addition, it was finalized by deleting and editing the list that has no effecton child loss or problems in performance through consultations with experts. This guideline suggests the method of preventing child loss inthe direction(aim) of the prevention required for each process of children getting lost, finding directions, and discovering their guardians. Inother words, it focuses on enhancing guardian’s child-watching, and preventing children’s breakaway in the aspect of children getting lost. The guideline also concentrates on improving children’s wayfinding abilities and employee’s searching abilities in the aspect of childrenfinding directions and reuniting with their guardians. 최근 가족고객을 타깃으로 한 복합상업시설 내 키즈공간이 증가하고 있고, 이에 따라 미아 발생에 대한 우려 또한 증가하고 있다. 따라서 본 연구에서는 복합상업시설의 환경설계를 통해 사전에 미아를 방지할 수 있는 가이드라인을 개발하고자 하였다. 이를 위해 문헌고찰을 함으로써 복합상업시설 계획요소와 미아방지 환경요소를 도출하였고, 가이드라인을 작성하였다. 그리고 전문가 자문을 통해 미아방지 효과가 없거나 실적용에 문제가 있는 항목들을 삭제하거나 수정보완함으로써 최종 미아방지 환경설계 가이드라인을 제시하였다. 본 가이드라인은 미아발생, 길찾기, 발견의 과정(단계)별로 요구되는 미아방지 방향(목표)에 대한 미아방지 방안을 제시하였다. 즉, 미아발생의 측면에서 보호자의 아동관찰 용이성을 향상시키는 방안과 아동 이탈을 방지하는 방안을 제시하였다. 그리고 길찾기와 발견의 측면에서 아동의 길찾기와 직원의 미아 수색의 용이성을 향상시키는 방안을 제시하였다. 해당 가이드라인이 실제로 복합상업시설에 적용된다면, 미아발생을 감소시킬 수 있을 것이다.

바이오미미크리 건축계획 과정의 체계화 및 웹기반 정보시스템의 개발에 관한 연구

강준경(Kang, Junekyung),이태규(Lee, Taegyu),유세원(Yoo, Saewon) 대한건축학회 2022 대한건축학회논문집 Vol.38 No.11

Although biomimicry is being applied to sustainable architecture with all its possibilities, biomimicry architectural practices have mostly focused on the esthetic design method. The reason why biomimicry architecture is not activated in terms of environmental function could be due to the lack of information and the absence of a systematic methodology. Therefore, this study aims to provide a basis for constructing a web-based information system that could overcome these limitations and provide practical information. For this purpose, a theoretical review on the concept of biomimicry and its application along with biomimicry architecture cases were analyzed. In addition, website related theories were investigated to find actual construction plans. Based on these, the structure of a web-based information system and the type of information provided were presented.

미아 사례조사를 통한 행태 및 환경적 측면에서의 미아 발생원인 도출 연구

최소영(Choi, Soyoung),최재필(Choi, Jaepil),유세원(Yoo, Saewon),한규빈(Han, Gyu Bin) 대한건축학회 2018 대한건축학회 학술발표대회 논문집 Vol.38 No.1

미아방지 대책을 위한 물리적 환경요소 도출 연구

최소영(Choi, Soyoung),최재필(Choi, Jaepil),유세원(Yoo, Saewon),한규빈(Han, Gyu Bin) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2

바이오미미크리를 활용한 우수활용 건축계획 방안에 관한 연구

최재필(Choi, Jaepil),이정원(Lee, Jungwon),강준경(Kang, Junekyung),김다은(Kim, Daeun),유세원(Yoo, Saewon) 대한건축학회 2016 대한건축학회논문집 Vol.32 No.2

The purpose of this research is to propose architectural planning methods for rainwater usage by applying ‘Biomimcry’, the imitation of lessons learned from nature. Rainwater usage related case studies that show biomimetic properties were analyzed and methods that activated the architecture were examined. This research has been carried out through the following process. First, the outline of case study analysis was formed based on theoretical studies related to biomimcry and rainwater usage, and research on how water is being utilized in nature. The total of 27 rainwater usage case studies demonstrated the implementation of rainwater during the initial stage of architectural planning. The properties of biomimetic application were analyzed, and cases were classified by evaluating the relevance of biomimetic qualities. Moreover, each case was examined on how biomimetic properties are applied in order to suggest a direction on applying biomimicry methods for rainwater usage planning in buildings in the future. Suggested biomimicry methods can be divided into macro and micro levels based on the range of application and the scale of applied mechanisms learned from nature. The result of this study will help architects who are interested in getting ideas or guidance for planning buildings that use rainwater.

바이오미미크리를 활용한 미세먼지 저감 방안에 관한 연구

이정원(Lee, Jungwon),최재필(Choi, Jaepil),강준경(Kang, Junekyung),김다은(Kim, Daeun),유세원(Yoo, Saewon) 대한건축학회 2017 대한건축학회논문집 Vol.33 No.1

Air pollution and health problems due to fine dust are widely perceived as a serious environmental problem. The purpose of this research is to present a Biomimicry method to reduce fine dust in buildings. Although architectural planning methods to control temperature, light, and etc. are continuously being studied, research for reducing fine dust still need progress. Research method and process is as follows. First, cases have been studied to derive specific effects of Biomimicry architecture. Also, existing methods of reducing fine dust have been studied to derive natural elements which are able to be used as a main factor for filtering fine dust. Organisms and principles found in nature where studied to see how theses elements are being controlled in nature. Based on this research process, Biomimicry methods for reducing fine dust in buildings have been presented and a building system was developed by selecting and applying presented methods. Results of this research can become a foundation to activate research and technical developments in this field.