• 한국산학기술학회논문지
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• 제12권11호
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• pp.5330-5336
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• 2011

우수유출저감과 건전한 도시 물순환 환경의 구축을 위하여 다양한 침투시설들의 개발 및 적용이 점점 중요해지고 있다. 본 연구에서는 도시에서 가로수목공간으로 사용되는 식재박스를 활용하여, 우수유출의 저감, 도시내 물순환 체계 개선 및 친환경적인 기능을 수행할 수 있는 침투시설을 개발하였다. 개발된 시설은 작은 규모로도 설치할 수 있어 광로, 대로, 중로, 소로 및 보행도로나 좁은 공간의 구분없이 설치가 가능하여, 기존 도시 및 신도시 등에 광범위하게 적용할 수 있다. 개발된 기술을 4차로에 적용할 경우 식수대의 설치간격을 6m미만으로 유지한다면, 98%의 호우사상에 대하여 우수의 유출을 65% 이상 저감할 수 있는 것으로 나타났다. 본 연구에서 개발된 가로수목공간 조성기술 적용을 통하여, 우수유출 저감에 따른 치수효과와 더불어 녹색도시의 구현이 가능할 것으로 기대된다.

• 한국입자에어로졸학회지
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• 제14권3호
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• pp.73-80
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• 2018

Recently, there has been much research on the effect of ultrafine dust on human body with increasing interest in the ultrafine dust. In the Republic of Korea, there are many old thermal power plants, and the amount of ultrafine dust emitted from the thermal power plants is reported to be about 14% of the total amount of domestic fine dust. Therefore, the amount of fine dust from the flue gas desulfurization facility in the thermal power plant needs be reduced. In this study, we made an experimental setup to simulate a flue gas desulfurization facility and analyzed the physical characteristics of the particles passing through a mist eliminator. Experiments were carried out to investigate the collection efficiency of the mist eliminator by using the Arizona Test Dust in a dry environment, and then spraying limestone slurry into the flue gas desulfurization system equipped with the mist eliminator to examine the size and morphology of limestone particles upstream and downstream of the mist eliminator. Cut-off size of the mist eliminator was formed at about $6{\mu}m$. The result of this study is expected to be helpful for designing an electrostatic precipitator for removing particles passing through the mist eliminator.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제20권4호
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• pp.67-80
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• 2014

Purpose : Long-term Care Insurance sets up facility standard and installation standard of aged care facilities and decides the presence of minimum number of rooms and its size in care facilities by using systematic instruments. Therefore, most aged care facilities had renovation in expansion and reconstruction following the revised regulations and even facility space structure and space composition are continuously improving. The study is to determine the purpose and trend by comparing before and after space composition of facilities which followed the implementation of Long-term Care Insurance and also to suggest hierarchical space composition suitable for aged care facilities through derived problems and to provide basic materials to plan the most appropriate facility for the aged. Methods : J-graph based on Space Syntax Theory will be schematized through in-site facility survey and before and after facility floor plan. Space composition trend will be analyzed by comparing indexes through S3 program. Results : As a result of 5 cases analysis, the following results were found; the average of whole space depth is increasing due to the Extension, the number of volunteers is decreasing and rooms for geriatric care helpers are being created due to the geriatric care helper introduction duty. Also, there are solariums being created to improve the health of the aged and dispensaries are being placed on every floor with the increase of documentary work for geriatric care helpers. With the policy implementation, care facility space composition and structure are changing with facility standard and it was analyzed that facilities were mostly put under the control of limited number of people in care room and total ground area per person. It was also found that there is increase in care space integration through before and after comparison of whole integration value. This is considered as the important result not only in facility standard satisfaction, but also in care support of geriatric care helpers and the aged, its main users. Implication : In order for elderly care facilities to have quality improvement and to develop as suitable facilities for characteristics of the aged, independent environmental facility standard preparation of elderly care facilities is needed through mutual cooperation of construction fields with regulation and policy related researches.

• 한국건축시공학회지
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• 제20권3호
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• pp.253-260
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• 2020

지하형 탄약고에 대한 관심이 증가하면서, 관련된 설계 결과가 다수 도출되고 있다. 그러나 터널 민간 전문가들뿐만 아니라 탄약관련 군 실무자들도 안전거리 기준을 완벽하게 숙지하지 못하여 안전거리 기준을 모두 준수한 신뢰성 있는 설계 결과는 도출되고 있지 않고 있는 실정이다. 또한 안전거리를 과하게 적용하여 부지를 비효율적으로 활용하거나 시공불가판정을 받는 사례도 보고되고 있다. 본 연구에서는 지하형 탄약고에 대한 안전거리 기준을 정리하고 이를 준수하면서 효율적으로 설계할 수 있는 방안에 대해 연구하였다. 또한 여러 방법 중 안전거리를 획기적으로 저감시킬 수 있는 방법을 도출하여 향후 지하형 탄약고 설계 및 시공 시에 적용할 수 있도록 데이터를 마련하였다.

• Wind and Structures
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• 제12권3호
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• pp.219-237
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• 2009

This study examines the accuracy of large-eddy simulation (LES) to simulate the flow around a large irregular sloping complex terrain. Typically, real built up environments are surrounded by complex terrain geometries with many features. The complex terrain surrounding The Hong Kong University of Science and Technology campus was modelled and the flow over an uphill slope was simulated. The simulated results, including mean velocity profiles and turbulence intensities, were compared with the flow characteristics measured in a wind tunnel model test. Given the size of the domain and the corresponding constraints on the resolution of the simulation, the mean velocity components within the boundary layer flow, especially in the stream-wise direction were found to be reasonably well replicated by the LES. The turbulence intensity values were found to differ from the wind tunnel results in the building recirculation zones, mostly due to the constraints placed on spatial and temporal resolutions. Based on the validated mean velocity profile results, the flow-structure interactions around these buildings and the surrounding terrain were examined.

• 대한조선학회논문집
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• 제54권4호
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• pp.312-320
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• 2017

This paper deals with the development of structural test facility for the strength assessment of marine leisure boat built from carbon fiber reinforced plastics (CFRP) materials. The structural test facility consists of test jig, load application and control system, and data acquisition system. Test jig, and load application and control system are designed to accommodate various size and short span to depth ratios of single skin, top-hat stiffened and sandwich constructions in plated structural format such as square and rectangular shapes. A lateral pressure load, typical and important applied load condition to the plates of the hull structure for marine leisure boat, is simulated by employing a number of hydraulic cylinders operated automatically and manually. To examine and operate the structural test facility, five carbon/epoxy based FRP square plates having the test section area of $1m^2$, which are part of CFRP marine leisure boat hull, are prepared and they are subjected to monotonically increasing lateral pressure loads. In the test preparation, considering the symmetry of the plates geometry, various strain gauges and linear variable displacement transformer are used in conjunction with data acquisition system utilizing LabVIEW. From the test observation, the responses of the CFRP hull structure of marine leisure boat are understood by obtaining load to deflection and strain to load curves.

• 농업과학연구
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• 제29권2호
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• pp.135-148
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• 2002

In recent years, domestic market environment of rice production is confronted with the problems of excessive production and decrease in per capita consumption, resulting in steady decline of domestic rice price. Moreover, as new trade negotiations of WTO or FTA are being forwarded, cheap price of imported rice will also make the rice production environment being worse off. One of the possible production strategies to relieve this situation could be expanding farm size, which increases market competitiveness in terms of cost-saving. Since 1990's, one of the main agricultural policies for rice production in Korea has been expanding farm size. This study aims at 1)exploring brief history of Korean government's agricultural policy for expanding farm size, 2)examining economic effect of farming size expansion, and 3)discussing major role of government to promote appropriate programs for rice-farming and producers. Main conclusion suggests that appropriate farming size should be expanded upto at least five hectares per farm, with producers' effort to reduce farming costs and continuous investments on agricultural infrastructures including irrigation systems, etc. Continuous government's investment on operation and maintenance on water facility is also one of the important factors in expanding farm size.

• 대한안전경영과학회지
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• 제9권5호
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• pp.103-110
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• 2007

To build a most efficient and competitive warehouse, need to reflect tenants various opinions in advance such as location, rentable size, leasing terms, rental, configuration of the building, building structure, traffic flow and amenities. Thus a survey for major tenants which are logistics, retailers and manufactures should be done to figure out potential demand and marketing strategy to lead to be a competitive warehouse. However above survey is time consuming work and requires high cost involvement thus to avoid such an inefficient process and to facilitate investors prompt and right decision making, there should be a tool which helps to make a decision process easier with simple key factors. In other word, we have used above mentioned 'Demand Approach' so far but here I am introducing 'Factors Comparison' which reflects location factors and facility factors. I derived Kwang-myung logistics park's proper rental rate through 'Demand Approach' which analyzed Seoul Metropolitan area's rental warehouse status and rents, and also defined a size of potential demand area and rental. And this report compared the result with an outcome of 'Factors Comparison' then compared each methods and drew a conclusion of 'Factors Comparion's better convenience and efficiency.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.78-81
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• 2021

스마트공장 구축사업을 통해 제조업의 생산설비에 센서가 설치되고 각종 공정데이터를 실시간으로 수집할 수 있게 되었다. 이를 통해 제조공정의 설비이상으로 인한 생산중단을 줄이기 위해 실시간 설비 이상 탐지에 대한 연구가 활발히 진행되고 있다. 본 논문에서는 생산설비의 이상탐지를 위해 제조데이터를 딥러닝 모델인 Autoencoder(AE), VAE(Variational Autoencoder), AAE(Adversarial Autoencoder)에 적용하여 그 결과를 도출하였다. 제조데이터는 단순 이동 평균 기법과 전처리 과정을 거쳐 입력데이터로 사용하였으며, 단순이동평균 기법의 윈도우 크기와 AE 모델의 특징벡터 크기에 따른 성능분석을 실시하였다.

• 산업경영시스템학회지
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• 제30권4호
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• pp.103-110
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• 2007

The facility location in designing a supply chain network is an important decision problem that gives form, structure, and shape to the entire supply chain system. Location problems involve determining the location, number, and size of the facilities to be used. The optimization of these location decisions requires careful attention to the inherent trade-offs among service time, inventory costs, facility cost, transportation costs. This paper presents a strategy that provides the best locations of distribution centers using GIS(Geographical Information System) assuming the limitation of delivery time. To get the best strategy of the location of distribution centers, we use the new loss functions as a penalty when the delivery time is violated