• Annual Conference of KIPS
• /
• 2015.04a
• /
• pp.196-198
• /
• 2015

최근 전파를 이용하여 먼 거리에서 정보를 인식할 수 있는 기술인 RFID를 이용한 사례들이 증가하면서 물류, 보안, 국방, 의료 등 다양한 분야로 확대되고 있다. 따라서 본 연구에서는 RFID 기술을 활용하여 공항이나 쇼핑몰 등과 같은 넓고 개방된 공간에서 Cluster, 시각 센서 네트워크, 서버가 서로 상호작용을 통해 객체들 혹은 사람들을 추적하여 일관성과 정확성 있는 데이터를 얻을 수 있는 시스템을 구현하고자 한다. 이와 같은 시스템은 넓은 공간에서 특정 객체를 추적하거나, 불특정한 원하지 않는 객체의 움직임을 파악할 수 있어 다양한 영역에 활용가능하리라 기대한다.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.37 no.3
• /
• pp.21-32
• /
• 2009

As an alternative for restoring a sense of community which has been broken up due to urban residence redevelopment, this study focuses on structural characteristics according to physical location of central squares in apartment complexes. Central squares do not simply function as inner-aiming and self-completed spaces for the residents, but their role can be expanded to a core location which encourages neighbors to communicate and interact with each other. The suppositions for this study are as follows. Structural characteristics according to the physical locations of the central squares in apartment complexes affect apartment residents' openness toward their neighbors and non-residents' accessibility to the square. At the same time, it influences the sense of community. In addition, psychological distance which is represented as psychological openness and accessibility forms a reciprocal relationship with the sense of community. For the study, we first categorized central squares as either open-structure or closed-structure based on how accessible it is from outside the apartment complex. According to these types of central squares, Sillim Prugio, Banghak Deasang Town Hyundai, Gwanak Prugio and Banghak Samsung Raemian 1 which have similar conditions and different structures were selected as sites of the study. Then each apartment complex was classified by apartment residents and non-residents so that eight groups were prepared for the survey. The results of the questionnaire survey especially regarding measuring the sense of community, psychological openness and accessibility indicated that the suppositions were right. Hence, the sense of community, psychological openness and accessibility are high in a central square with an open-structure while high standards of psychological openness and accessibility guarantee a positive sense of community. This study is meaningful in that it verifies that the physical location of central squares is reciprocally related to psychological openness, accessibility and a sense of community. At the same time, this study may serve as theoretical grounds for the planning and construction of practical central squares.

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2018.06a
• /
• pp.85.1-85.1
• /
• 2018

고표면적 다공성 금속 박막 형성 기술은 타겟에서 방출된 금속 원자들이 타겟 주변에서 서로 충돌하여 나노입자를 형성한 후 기판으로 입자를 이송시켜 나노 구조를 지니는 박막을 성장시키는 기술이다. 고표면적 다공성 금속 박막 형성 기술로 제작한 다공성 박막은 열린 기공 구조를 지니고 있기 때문에 외부 기체의 확산이 용이하고 비표면적이 높다는 특징을 가지고 있다. 특히 금속 공기 이차전지 등의 배터리의 경우 전극의 비표면적이 성능을 결정하는 중요한 인자이므로 금속판을 사용하는 경우 대비 비표면적이 높은 나노구조를 사용할 경우 용량 증대에 유리하다. 본 연구에서는 공정 압력, 공정 파워, 타겟과 기판과의 거리, 칠러 온도 등 증착 공정 변수를 제어하여 표면적이 높은 아연 나노 구조를 형성하였다. 이를 분석하기 위해 SEM을 이용하여 미세구조 및 두께를 관찰하였으며, 박막 증착 전후의 무게를 측정하여 기공률을 계산하였다. 또한 XRD 분석을 통하여 결정성 및 결정의 크기를 확인하였다. 이렇게 제작된 고표면적 다공성 Zn 금속박막을 응용하여 아연 전지 성능 평가를 진행하였다.

• Life and Agrochemicals
• /
• v.29 no.10
• /
• pp.21-30
• /
• 2008

한국농약과학회(회장 최운홍)와 한국작물보호협회(회장 염병만)가 고동 주최한 "2008한국농약과학회 추계 학술발표회 및 한국작물보호협회 창립 35주년 기념 심포지엄"이 관계 및 학계, 언론, 업계 관계자 등 400여명이 참석한 가운데 성황리 개최됐다. 지난 10월 9일부터 10일까지 이틀 동안 강원도 용평리조트내 그린피아콘도 그랜드볼룸에서 '애그플fp이션 시대 식량주권과 작물보호제 산업'이란 주제로 열린 이번 행사에서는 최근 의미가 모호한채 만능인 양 확산되어 가는 유기농업의 빛과 그림자를 조명하고, 애그플레이션 시대 세계열강들의 곡물 확보 전쟁 등으로 식량무기화는 가능성이 아니라 목전에 와 있는 현실임을 상기시켜 작물보호제의 중요성과 그 위상을 재정립하며 나아갈 방향을 확립하는 좋은 계기가 된 것으로 분석된다. 농약과학회 최운홍 회장은 개회사를 통해 "전 세계적으로 몰아닥치고 있는 곡물가격 상승과 식량위기는 식량확보의 중요성은 물론 기존 식량의 소중함을 다시 한번 일깨워 주고 우리농업을 새롭게 평가 조명할 수 있는 좋은 기회"라면서 "급변하는 세계 농업흐름 속에서 현실을 적시하고 농업생산의 중요한 축을 담당하고 있는 작물보호제의 중요성과 위상을 재정립 하며 나아갈 방향을 모색하는 의미 있는 행사가 되길 바란다"고 말했다. 한국작물보호협회 염병만 회장은 환영사를 통해 "지구촌은 지금 어느 누구도 소중한 먹을거리로부터 안심하지 못하고 있다"면서 "식량자급이 안정적으로 이루어지지 않는 한 작금의 일시적 풍요는 사상누각에 불과할 뿐"이라고 전제하고 "이제는 먹을거리의 진정한 위해요소가 무엇인지 가려낼 줄 알아야 하며 과학을 보는 소비자의 인식도 공평해져야 한다"고 강조했다. 이날 심포지엄에서는 일본 동경농업대학 Naoki Motoyama 교수의 '일본 유기농업의 허상과 실상'을 비롯, 모두 5편의 주제발표가 있었다. 주요 내용을 요약, 정리해 본다.

• Journal of the Korean Geographical Society
• /
• v.42 no.5
• /
• pp.710-727
• /
• 2007

This paper suggests an inquiry into the characteristics and implications of urbanscapes produced by Internet cafes, widely called PC Bangs in Korea, and their effects on the motions and boundaries of human bodies as cyborgs which exist in between actual and virtual spaces or between human and machine spaces in PC Bangs. The paper, which is organised into two main sections, first investigates the streetscapes of PC Bangs as electronic architectural spaces and suggests the urban electronic space of PC Bangs in terms of hypertext space. Then, it looks at the effects of PC Bangs on human bodies which exist as human-machine hybrids or cyborgs in PC Bangs. The paradoxical socio-spatial characteristics of PC Bangs as third, liminal or hybrid spaces between actual and virtual spaces or between human and machine spaces can be explained as follows. Firstly, there appear both nomadic and sedentary landscapes in that people in PC Bangs move in virtual spaces on the one hand, and are static in actual spaces on the other hand. Secondly, both open and closed spaces are shaped in that although PC Bangs act as open or public electronic spaces, they involve invisible social boundaries, forming the gendered space of masculinism. Thirdly, the boundaries of the human body are extended and are shrunk at the same time in that while the sensory boundaries of the body in PC Bangs are extended through electronic networks, its social boundaries are shrunk through the imaginary space of solipsism. Thus and finally, PC Bangs can be characterised not only as social spaces entailing embodied and gendered landscapes, but also as non-places involving the cyborg landscapes of human-machine connections.

• Journal of the Korea Convergence Society
• /
• v.10 no.12
• /
• pp.315-325
• /
• 2019

The purpose of this study is to design and construct a data mart that anyone can easily analyze subway OD movement patterns. Subway OD data of the year 2017 was downloaded from the Seoul Open Data Plaza and used as the source data. A multidimensional model was designed, and Gaussian mixed cluster analysis and visualization analysis using Tableau were performed. Interestingly, movement between suburban and Seoul accounts for 23% of the total traffic. The passengers of Suwon Station move to the suburbs much more than Seoul, while Pangyo Station mostly moves to Seoul. As a result of Gaussian mixed cluster, eight clusters of OD segments were found, and the characteristics of each cluster were characterized by segment distance and passenger size.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.40 no.6
• /
• pp.114-123
• /
• 2003

The current paper proposes a new vertex selection scheme for polygon-based contour coding. To efficiently characterize the shape of an object, we incorporate the curvature information in addition to the conventional maximum distance criterion in vertex selection process. The proposed method consists of "two-step procedure." At first, contour pixels of high curvature value are selected as key vortices based on the curvature scale space (CSS), thereby dividing an overall contour into several contour-segments. Each segment is considered as an open contour whose end points are two consecutive key vortices and is processed independently. In the second step, vertices for each contour segment are selected using progressive vertex selection (PVS) method in order to obtain minimum number of vertices under the given maximum distance criterion ( $D_{max}$$^{*}$). Furthermore, the obtained vortices are adjusted using the dynamic programming (DP) technique to optimal positions in the error area sense. Experimental results are presented to compare the approximation performances of the proposed and conventional methods.imation performances of the proposed and conventional methods.

• Journal of the Korean Geographical Society
• /
• v.49 no.4
• /
• pp.546-562
• /
• 2014

This research attempts to investigate the geographical approaches on healing, which have been neglected in geography relatively, comprehensively and to examine the meaning of healing in daily life from the viewpoint of the managers of psychological counselling caf$\acute{e}$s. According to the results of this research, exposed healing spaces such as mental clinics or counselling centers are regarded as cultural stigmatic spaces; besides, psychological counselling caf$\acute{e}$s decrease psychological distance or resistance and people calling for healing can access these healing spaces easily. Second, healing spaces from a perspective of modern people mean geographical boundaries as refuges for a brief time; accordingly, the users' activities in psychological counselling caf$\acute{e}$s as instant or unexpected healing spaces in daily life are interpreted as special experiences without any emotional burdens. And these psychological counselling caf$\acute{e}$s are regarded as the spaces where can experience healing repeatedly and continuously. Third, psychological counselling caf$\acute{e}$s were changed into general caf$\acute{e}$s as open spaces; therefore, they can penetrate deeper into daily life rather than others.

• Journal of the Institute of Convergence Signal Processing
• /
• v.11 no.1
• /
• pp.63-73
• /
• 2010

This paper presents the optimal design method of an overlapped ultrasonic sensor ring for reduced positional uncertainty, and its application to the obstacle detection with improved resolution. Basically, it is assumed that a set of ultrasonic sensors are installed to form a circle at regular intervals with their beams overlapped. First, exploiting the overlapped beam pattern, the positional uncertainty inherent to an ultrasonic sensor is shown to be significantly reduced. Second, for an ideal ultrasonic sensor ring of zero radius, the effective beam width is defined to represent the positional uncertainty, and the optimal number of ultrasonic sensors required for minimal effective beam width is obtained. Third, for an actual ultrasonic sensor ring of nonzero radius, the design index is defined to represent the degree of positional uncertainty, and an optimal design of an overlapped ultrasonic sensor ring consisting of commercial ultrasonic sensors with low directivity is given. Fourth, given measured distances from ultrasonic sensors, the geometric method is described to compute the obstacle position with reference to the center of a mobile robot. Finally, through experiments using our overlapped ultrasonic sensor ring prototype, the validity and performance of the proposed method is demonstrated.

• Journal of the Institute of Electronics Engineers of Korea CI
• /
• v.48 no.5
• /
• pp.99-106
• /
• 2011

In many applications, wireless sensor networks could be thought as data-centric networks, and the sensor nodes are densely distributed over a large sensor field. The sensor nodes are normally vulnerable in terms of security since they are very often deployed in a hostile environment and open space. In this paper, we propose a scheme for contents-based anomaly detection in wireless sensor networks. In this scheme we use the characteristics of sensor networks where several nodes surrounding an event point can simultaneously detect the phenomenon occurring and the contents detected from these sensors are limited to inside a certain range. The proposed scheme consists of several phases; training, testing and refining phases. Anomaly candidates detected by the distance-based anomaly detection scheme in the testing phase are sent to the refining phase. They are then compared in the sink node with previously collected data set to improve detection performance in the refining phase. Our simulation results suggest the effectiveness of the proposed scheme in this paper evidenced by the improvements of the detection rate and the false positive rate.