• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.10a
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• pp.285-288
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• 2004

스마트 홈은 유비쿼터스 환경의 각종 센서와 정보가전에서 얻어지는 데이터에서 사용자의 Context를 추출하여 사용자에게 적응적인 서비스를 제공한다 지금까지의 Context는 사용자가 한 명일 경우를 가정하였지만 실제 집이라는 공간은 가족이라는 구성원이 함께 생활하는 공간으로 동시에 여러 개의 Context가 존재하며 이러한 Context는 서로 충돌할 수도 있다. 본 논문에서는 집에서 여러 Context들 간에 충돌이 일어났을 때 이를 해결하는 방법을 제안한다. 집은 여러 사용자가 공유하고 있지만 각 구성원의 침실이나 화장실처럼 한 개인의 영역이 존재한다 또한 침실은 쉬는 곳, 주방은 요리를 하고 음식을 먹는 곳, 거실은 가족끼리의 모임을 갖거나 TV 시청, 음악감상 등의 여가를 즐기는 곳 등 공간마다 나름의 용도를 가지고 있다 본 논문은 Context들간의 충돌을 조정을 위해 이러한 공간의 특성을 이용할 것을 제안한다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2015.11a
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• pp.341-344
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• 2015

본 논문에서는 소규모 공간을 규정하였다. 광의의 소규모 공간이란 바닥 면적이 $300m^2$ 미만으로서 소방관련법 상 소화설비 설치대상에서 제외되는 공간에 해당한다. 또한 협의의 개념으로 소방관련법 상 소화설비 설치대상에 해당하나 바닥 면적이 $300m^2$ 미만 중에 소화설비 설치가 제외되는 공간과 피트공간과 그 밖의 소방관련법 상 소화설비 설치대상에 포함되지 아니하는 주방을 의미한다. 소규모 공간이지만 사용 용도가 창고 등과 겸용으로 사용되어 화재하중을 예상하기 어려우며 소화설비가 요구되는 공간이다. 본 연구는 다양한 화재원인 중에 전기화재에 관한 것으로 전기설비의 안전성능 기준이 강화되고 제품의 질적 수준이 향상됨에 따라 발화요인별 화재 발생률이 다소 둔화되고 있으나 전기화재는 여전히 화재사고의 상당한 부분을 차지하고 있는 실정으로 소규모에서 발생할 수 있는 화재를 대상으로 하여 구획된 소공간유형의 EPS실에서 케이블 등의 가연성물질에 대한 화재위험성을 시뮬레이션 분석을 통하여 산정하였다.

• Tunnel and Underground Space
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• v.26 no.6
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• pp.508-515
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• 2016

In this study, we compared the stability of the pillars by using room and pillar mining method with the four models with different stiffness and pillar overlap ratio. The experimental models consist of two plaster models (overlap ratio 0%, 100%) and two cement models(overlap ratio 0%, 100%). The soft and hard rocks are modeled by plaster and cement models respectively. In these experiments, the model materials with strength values reflecting the calculated scaled factors not been used, so it is not a true scaled model test that reproduces in situ state in the laboratory. Experimental results show that the different overlap ratio pillars are one of the factors that can affect the stability of the mine.

• The Journal of the Convergence on Culture Technology
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• v.4 no.1
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• pp.325-329
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• 2018

There are many pollutants in the residential space due to building materials, ventilation, cooking, etc. Among them, particulate matter is a primary carcinogen and very harmfull to the human body, it occurs mostly in cooking. Therefore, in order to manage the indoor air quality well, it is necessary to evaluate the relationship between the concentration of particulate matter generated during cooking and ventilation method. In this study, we propose a management method and particulate matte which occurs during the kitchen cooking by measuring and analyzing the concenteation change of particulate matter(PM2.5) according to the type of food and the ventilation method.

• Tunnel and Underground Space
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• v.27 no.3
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• pp.161-171
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• 2017

Demand for high-grade limestone is increasing, but the production in the domestic mines has been limited due to the lack of systematic development plans and efforts to develop mining technology to improve the recovery ratio, transition to high-cost underground mining due to increasing social awareness of environmental protection, and the smallness of the domestic mining industry, etc. In this study in connection with this issue, an analysis on the recovery change by improvement of mining method was executed. 3D modeling technique was used to construct a 3D model. 3D model includes the geological structure, the limestone ore body and the underground pits and tunnels excavated at the Daepyeong District of Daesung MDI Donghae District. By using the 3D model, measured resources, reserves and ore recovery were evaluated from the results of pilot operation of the room and pillar hybrid mining method, which is a variant of room and pillar mining method. These results were compared with those obtained from the conventional mining method. The ore recovery obtained by hybrid mining method was found to be up to 71.6%, showing about 26%p. increase compared with the case of conventional mining method.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2009.04a
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• pp.346-351
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• 2009

본 연구에서는 화재시 많은 인명피해가 예상되는 공동 주택을 대상으로 단위공간별 화재 성상을 예측하기 위한 실물화재실험을 실시하였다. 구성된 실물화재모델은 비교적 가연물량이 많은 침실과 화재 발생 위험도가 높은 주방을 대상으로 하였으며, 실험 모델에 구성된 단위품목은 일반주택의 가연물을 선조사 한 후 선정하였다. 실험결과 침실의 경우 점화 후 약 5분이 경과되었을 때 플래쉬오버 상태에 이르게 되어 매우 급격한 성장을 보였으며, 최대 열방출율 약 7433.3 kW, 최대 일산화탄소 578.6 ppm, 최대 이산화탄소 1.25ppm, 내부 최대온도 1350$^{\circ}$로 측정 되었다. 특히, 화재 발생 초기에 가연 공간에서 화재의 진화가 이루어지지 않으면 약 3분 내에 인체에 급격한 피해를 줄 수 있는 한계온도 이상으로 화재가 성장하기 때문에 신속한 초기 대응이 필요함을 확인하였다. 이러한 실물화 재실험에서 얻어낸 결과는 향후 화재확대 예측 시뮬레이션 결과와 비교함으로써 각 용도별 공간에서의 화재 확산 예측에 적용 될 수 있을 것이다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.4
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• pp.832-841
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• 2007

Recent decreased number of family members have caused at least one spare room which is not used as a bedroom in an apartment house. In addition, people who need an apartment house cannot be satisfied with the typical unit plan any more, and rather request more various types of living space. Based on this kind of housing needs trend, we would like to analyze and classify dwelling unit planning methods which may create particular purpose extra rooms to satisfy their unique needs and to give characteristics and individualities by means of study on various cases. As a result of this study, we could find the following planning methods which can produce extra rooms : 1) Utilization of optional plan between living room and adjacent bedrooms, 2) Utilization of optional plan on master bedroom zone, 3) Insertion of transitional space and Utilization of spare space, 4) Insertion of a space for housewives near a kitchen, 5) Positive utilization of a balcony space. This study is also trying to show many unit plan cases of which planning methods can be applied in other cases.

• Journal of Energy Engineering
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• v.11 no.4
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• pp.306-316
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• 2002

ln this paper, flowfields inside the various rooms have been investigated. A storage room, a liv-ingroom with a kitchen in an apartment, and a hospital room are considered in the present calculations. In all cases, it was found that the average of air change rate is. similar to that of perfect mixing assumption and the location of air purifier has little effects on the average air change rate. Detailed local air concentrations show that there are regions where air is not quite purified because of non-uniform circulation of air flow. The location of air purifier has great effects on this behavior.

• Tunnel and Underground Space
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• v.27 no.6
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• pp.406-421
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• 2017

This study describes a precise numerical analysis process by adopting the real image of mine openings obtained by LIDAR, which can produce a point cloud data by measuring the target surface numerically. Research area is a section of underground limestone mine which is used hybrid room-and-pillar method for improving the production rate. From the application of LIDAR to this section several results were deduced, that is, the central axis of upper and lower vertical safety pillars is distorted to the direction of NW and the section area of lower vertical safety pillar is $34m^2$ smaller than the designed area of $100m^2$. The results of precise measurement in geometrical shape of mine openings and precise simulation in numerical analysis confirms that LIDAR techniques can be suggested as a valuable tool for stability analysis in underground mine by configuring the mine opening shape.

• Tunnel and Underground Space
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• v.30 no.5
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• pp.473-483
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• 2020

This paper examines the vertical stress change concentrated on mine pillar which occurs due to the stress disturbance from opening excavation at room and pillar mine by FLAC3D, a finite difference method (FDM) software. The mesh size combination is decided with a careful consideration of relative error and run-time, then its performance is verified. A series of numerical analyses is conducted and the vertical stress at central pillar was observed for the test cases of 1×1 to 11×11 mine pillars, 40 m to 320 m depth with 40 m difference. The results show that the vertical stress of pillar approaches to the similar value with the value estimated by tributary area theory(TAT) when the development area (N_P) is increased or the height of overburden (H_OB) is decreased, while it is overestimated in the opposite case. Furthermore, it also represents that the vertical stress factor (VSF) converges to a specific value when the depth is increased whille keeping the development area identical.