• 한국주거학회논문집
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• 제17권6호
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• pp.141-148
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• 2006

The purpose of this study is to investigate tendencies on land use in the housing site development district by grasping the characteristics of changes of building use at the borders of single-detached housing area for planning single-detached housing area in the future. It is divided the borders of detached housing areas into three types, educational facility, parks and green spaces, and apartment complex, and then analyzed the characteristics of each location after a field study. It is summarized as follows. First, there were stationery and flour-based meal stores in adjacent borders near educational facilities, suitable for students' interest and motion patterns, and it is required to consider about frequent children's action in the street. Second, there are many facilities for park users and residents, such as educational institutes and restaurants in adjacent to borders near parks. In borders neighboring buffer green belt areas, warehouses and vacant sites were mainly distributed. And the revitalization of streets was lower than others, because a road was used as a parking space. Third, there were realty dealers, food stores, and laundries which provide the dwellers with service in adjacent borders near multi-family housing.

• 한국강구조학회 논문집
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• 제16권3호통권70호
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• pp.305-314
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• 2004

최근 국내에서 건설되고 있는 주거건물과 주상복합건물은 단일건물보다는 다수의 건물군으로 구성되어 있는 경우가 많다. 단일건물의 경우도 환기 및 채광성을 비롯한 외관상의 문제와 상업성을 고려하여 하층부는 하나의 건물로 이루어지고 중 상층부로 갈수록 두개의 건물로 나누어져 두개의 동이 하나의 건물로 구성되어 있는 건축물이 많이 건설되고 잇는 추세이다. 이와 같이 높고 세장하며 복잡한 건축물은 질량과 감쇠가 낮을 뿐만 아니라 바람에 의한 건물군 사이의 상호작용효과 등에 의해 구조적인 안전성과 사용성은 풍하중에 의해 결정되어진다. 그러나 현재 다수의 건물군으로 이루어진 건축물의 구조설계시 인접한 동사이의 상호작용 효과에 대해 규명되어 있지 못하며 또한 그 상호작용 효과를 예측하기란 어려운 일이다. 따라서 본 연구에서는 현존하거나 현재 건설중에 있는 두 개동을 가진 건축물의 현황을 파악하여 그 패턴을 모델화 한 후, 풍동실험(wind tunnel test)을 통해 두 개의 동 사이의 인동거리에 따른 풍응답 상호작용 효과를 가속도응답을 중심으로 비교분석하였다. 본 연구의 결과로부터 건물군에 대한 풍응답 상호작용효과의 기초적 자료를 제시할 것이며 나아가 좀더 합리적이고 경제적인 구조설계를 위한 자료로 활용될 수 있을 것이다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1509-1518
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• 2011

Shield TBM tunneling method has been getting the spotlight for urban tunneling. It can be minimized the civil complaint during construction and possible safe tunneling. But the settlement has occurred inevitably due to characteristics of shield TBM equipment. For this reason, the civil complaint can occur in urban areas when tunnel with shallow depth passes through neighboring building or residential area. In this study, the occurrence factors of settlement according to shield TBM tunneling and the tendency of ground settlement by strata condition had analyzed. It is suggested that the practical settlement estimation method and minimizing method of ground settlement under simultaneous backfill grouting condition through measurement results and back analysis data using gap parameter.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제15권4호
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• pp.307-318
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• 2011

We introduce an algorithm that automatically generates paper templates of a triangulated surface. The surface can be built by cutting, folding, and pasting the paper templates. The algorithm is branched to two strategies : one is to select the longest neghboring edge among many choices, and the other is to select the largest neighboring triangle. Three surfaces, whose triangulation sizes widely range, are successfully built by the algorithm. The two strategies are empirically evaluated in building the surfaces with respect to paper consumption, a measure of cost efficiency, and boundary length, a measure of speed efficiency. Strategy 1 performs in most cases better than the other one with respect to boundary length, but sometimes wins and sometimes loese with respect to paper consumption.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1998년도 학술발표회 발표논문집
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• pp.401-406
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• 1998

This study aimed at the technique for the construction control in braced excavation works. Selecting a case of Kwangju subway works, field observational values were compared with prediction using Plaxis's. Maximum observational values relevant to both horizontal and vertical proved satisfactory in that they were within the criteria. Numerical results by used Plaxis were overestimated greater than observational values, which meant the prediction were safe tendency. .It must be emphasized that displacement measurement for neighboring important structures should be carried out in order to take countermeasure charge for construction methods, in case that the risk or failure was previewed.

• Journal of information and communication convergence engineering
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• 제15권1호
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• pp.37-42
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• 2017

The constrained application protocol (CoAP) can be used for remotely controlling various sensor devices in Internet of Things (IoT) networks. In CoAP, to support the handover of a mobile sensor device, service discovery and message transmission needs to be repeated, although doing so would increase the handover delay significantly. To address this limitation of CoAP, a centralized CoAP scheme has been proposed. However, it tends to result in performance degradation for an inter-domain handover case. In this letter, we propose a distributed CoAP handover scheme to support the inter-domain handover. In the proposed scheme, a distributed mobility agent (DMA) is used for managing the location of mobile sensors in a domain and performing handover control operations with its neighboring DMAs in a distributed manner. A performance comparison reveals that the proposed scheme offers a performance improvement of up to 29.5% in terms of the handover delay.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계 학술발표회 논문집(II)
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• pp.601-604
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• 2006

Recently the new inorganic sound-absorbing material manufacturing techniques have introduced. These mainly is plentifully used in the place where the noise damage becomes problem in life environment, partitioning of the apartment, the railroad and the express highway, school and the residential quarter neighboring area etc. While the sound-absorbing material has vast quantity of open pore, sound insulation material, used in the apartment and high building in order to prevent the sound between layers, has suitable quantity of closed pore. The fly ash is widely used in the cement materials and the concrete binder material. The bottom ash, however, is rarely used for the grain size is big and multiform with unburning carbon ingredient. In this paper, the practical field tests and the results on the sound reduction properties of formed concrete using bottom ash are described.

• Ocean and Polar Research
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• 제31권4호
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• pp.361-368
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• 2009

An operational oceanographic system needs to be established for the preservation and management of marine environments and resources, and also to secure the safety and efficiency of marine operations in Korea. One of the major roles of operational oceanography is to deliver ocean science products which can meet the requirements of users such as marine industries, the general public, government agencies, and scientific research communities. Technical issues in relation to development of an effective operational oceanographic system in Korea are identified and discussed. Among others, cooperation among the agencies in ocean, meteorology, hydrology and environment, and also among those of neighboring countries is important for the development of an effective operational oceanographic system. The strategy for building a system that meets the demands of users, with consideration to potential problems, are explored.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.41-46
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• 2017

한반도를 둘러싼 세 나라인 일본, 중국, 러시아는 경제력이나 국력 등에서 세계를 주도하는 나라들이다. 이들은 과학기술분야, 특히 우주분야에서 선두를 다투는 국가들이다. 그에 비해 우리는 새로운 발사체 개발이 중반에 들어섰고, 새로운 발사장 구축도 한창인 수준이다. 본 논문에서는 러시아 기술을 근간으로 하고 있는 러시아와 중국의 발사장의 현황을 알아보고, 이를 통하여 한국형발사체 발사대구축 및 향후 기대되는 미래 발사체 구축에 참고로 삼고자 한다.

• 소음진동
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• 제2권4호
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• pp.273-280
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• 1992

The prediction of vibration response of floor is necessary in order to check whether the floor vibration level will satisfy the allowable vibration standard of precise machinery such as electronic microscopes in semiconductor manufacturing plant before the installation of various neighboring equipment facility. In conventional vibration isolation, we were mainly interested in minimization of vibration transmissibility and stabilization of vibration isolation system. But in order to predict vibration response of floor, it is necessary to know exciting force of equipment installed on the floor and the mobility of the floor. We measured the exciting force of the dropped mass assumed as equipment and the mobility of some practical building floor using large impact hammer. And from this we predicted the vibration response of floor on which the mass dropped. This predicted vibration response of floor is compared with measured vibration response. Through upper procedure, we examined the possibility of predicting vibration response of floor from the information of exciting force of equipment and the mobility of floor.