• Journal of Korean Association for Spatial Structures
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• v.22 no.2
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• pp.4-9
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• 2022

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1993.05a
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• pp.18-19
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• 1993

지상의 기상환경조절이 불가능한 노지재배는 생산의 불안정요인이 대부분 기후조건으로 부터 기인된다. 반면에 시설원예는 피복재를 이용하여 격리된 공간을 만들고 그 속에 태양에너지를 저장하고 이를 제어하여 작물의 생육에 적절한 온실환경을 조성하는 수단이며 밀폐된 공간은 외부와 격리되어 있기 때문에 열 및 물질의 전달이 억제되므로 필요한 경우에는 열, $CO_2$, 습도 및 공기의 이동 등 보조에너지의 투입이 가능하므로 보다 적절한 지상환경조건을 조성할 수 있다. (중략)

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2004.11a
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• pp.203-206
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• 2004

• Journal of Korea Foundry Society
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• v.44 no.1
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• pp.19-23
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• 2024

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.310-312
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• 2022

거주공간은 외부 환경으로부터 거주자를 안전하게 보호하고 사람의 생존을 위한 기본적인 환경을 갖추어야 한다. 또한 사회적 소통과 활동, 그리고 보다 안전하고 쾌적한 생활(업무 등 목적 행위 포함)을 보장할 수 있어야 한다. 수중주거공간은 일반적인 거주환경과 다른 극한 환경이며, 입지에 따른 고립과 공간 활용의 제한이 있다. 따라서 수중주거공간의 거주성 확보를 위해 공간설계기술 및 관련 기준 개발이 필요하다. 수중 habitat 프로그램은 1962년부터 1977년까지 선진국 17개국이 총 65개 수중거주공간을 해저에 설치하고 운영한 것으로서 수중주거공간에 대한 많은 데이터를 축적하였다. 이 연구에서는 수중 habitat 프로그램의 사례를 분석하고, 특성을 도출하여 수중주거공간 계획에서 고려해야 할 요소를 정리하였다.

• The KIPS Transactions:PartA
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• v.12A no.5 s.95
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• pp.451-460
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• 2005

We present a methodology to design energy-efficient data paths using FPGAs. Our methodology integrates domain specific modeling, coarse-grained performance evaluation, design space exploration, and low-level simulation to understand the tradeoffs between energy, latency, and area. The domain specific modeling technique defines a high-level model by identifying various components and parameters specific to a domain that affect the system-wide energy dissipation. A domain is a family of architectures and corresponding algorithms for a given application kernel. The high-level model also consists of functions for estimating energy, latency, and area that facilitate tradeoff analysis. Design space exploration(DSE) analyzes the design space defined by the domain and selects a set of designs. Low-level simulations are used for accurate performance estimation for the designs selected by the DSE and also for final design selection We illustrate our methodology using a family of architectures and algorithms for matrix multiplication. The designs identified by our methodology demonstrate tradeoffs among energy, latency, and area. We compare our designs with a vendor specified matrix multiplication kernel to demonstrate the effectiveness of our methodology. To illustrate the effectiveness of our methodology, we used average power density(E/AT), energy/(area x latency), as themetric for comparison. For various problem sizes, designs obtained using our methodology are on average $25\%$ superior with respect to the E/AT performance metric, compared with the state-of-the-art designs by Xilinx. We also discuss the implementation of our methodology using the MILAN framework.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.5 no.5
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• pp.461-470
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• 2015

There has been a significant increase in the amount of research on reducing the lighting power consumption of buildings and also an increasing demand for technological development. Light shelf has been recognized as one of the most efficient solutions to this issue and related researches have been conducted, which have mostly focused on factors related to simple light shelves and are not suitable as an appropriate basis for the design of light shelves. Thus this study aims to establish the proper design basis for light shelves by evaluating the performance of shelves per reflection rate in indoor areas. Power consumption rate and indoor illumination intensity distribution of a testbed built based on actual living conditions were calculated for the performance evaluation, of which the results are as following: 1) Reduction of reflection rate of ceiling and walls caused average illumination intensity in summer, winter and median seasons, and evenness per reflection rate of indoor areas was found to be different in summer, winter and median seasons, making it a necessary consideration for designing light shelves. 2) Calculation of power consumption from lighting control showed that a high reflection rate of indoor areas may be suitable for power consumption reduction, and that reflection rates higher than 80% for ceilings and higher than 75% for walls in terms of the efficiency of researches on the indoor reflection rate and its application would be appropriate. This study is meaningful as the research focuses on light shelves based on considering indoor environmental factors. More studies will be required that consider a variety of factors.

• KIPE Magazine
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• v.14 no.2
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• pp.27-31
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• 2009

• Korea Petroleum Association Journal
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• no.11 s.227
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• pp.34-37
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• 2001

• Tunnel and Underground Space
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• v.11 no.1
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• pp.36-41
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• 2001

It is often said that the supply of fossil fuels in use for energy source will last only for 40 years. Futhermore, statistics shows that most of the fuels are imported from outside and that 30-40% of total cost for housing in Korea. One of those methods for reducing the energy cost for housing is to use underground space. Being used well, it may bring a considerable saving of energy since the underground space keeps its air cool in summer and warm in winter. To use underground space, we need to analyse its temperature first. For this purpose, what is generally used is the numerical analysis with the use of nodal system. That is, we can calculate a specific underground temperature with the matrix of thermal resistance after we make a nodal system. However, the existing numerical analysis programs need usually high cost and require a computer with large capacity. So they are seldom used in practice. Considering such problems, this study seeks to find a method for making the matrix of thermal resistance operatable on PC level.