• Architectural research
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• 제19권2호
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• pp.45-52
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• 2017

Recently, as a new perspective to view the architecture in relation to global environmental problems, interest in environmental architecture that conforms to the surrounding environment and nature with nature has been expanded as a part of the natural ecosystem, rather than seeing the building as an independent entity. Traditional Korean architecture creates a comfortable indoor environment by appropriately using the natural energy around, ranging from the arrangement of the building and the space composition to the use of detailed materials and to harmonize the artificial architectural environment without harming the natural ecosystem. The purpose of this study is to propose a method to apply the environmental control techniques of traditional buildings to modern buildings. As a research method, the characteristics of Korean traditional buildings according to the climatic characteristics of Korea were recognized through existing literature data and when applied to methods of traditional buildings, ventilation systems, control through eaves, and humidity control using Hanji the effect of energy load control on traditional buildings was analyzed and identified through existing literature. After analyzing the problems of modern architecture, we analyzed the effect of the environmental control system of traditional architecture on modern architecture. Simulation results show that the application of the environmental control system of traditional buildings to modern buildings reduces the cooling and heating load of modern buildings and has an effect on humidity control. This study suggests that quantitative energy saving will be possible if the environmental control techniques of traditional buildings are appropriately applied to modern buildings.

• 한국전자통신학회논문지
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• 제12권3호
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• pp.465-470
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• 2017

본 논문은 가전로봇 항해 성능 개선을 위하여 사용된 SLAM기반 확률적 필터 개선 알고리즘을 이용하여 최근 각광받고 있는 사물인터넷과 융합한 아파트 실내나 베란다에서 사용이 가능한 스마트 가든 시스템을 설계 구현하였다. 이를 위하여 개방하드웨어 제어기인 아두이노와 센서들을 이용하였고, 세 가지 무선방식(블루투스, 이더넷, 와이파이)으로 자동 급수 및 조명, 성장모니터링을 제어 및 관찰이 가능하도록 설계하였다. 본 시스템은 이미 많은 활용이 되고 있는 기존의 식물공장과 같은 대규모 재배 시스템이 아니고 아파트와 같은 실내에서 사용 할 수 있도록 하기 위하여 개발되었다. 개발된 시스템은 스마트폰 앱을 통한 제어는 물론 토양센서, 조도센서, 습도센서, 온도센서 등을 이용하여 환경데이터를 수집하고 수집된 데이터를 분석하여 급수펌프와 LED 램프, 온도를 제어하기 위한 환기팬 등의 기능으로 구성되었다. 무선 원격제어 방법으로는 블루투스, 이더넷, 와이파이 등이 모두 가능하도록 구현 하였다. 따라서 사용자가 집안에 없을 때 원격 제어 및 모니터링이 가능하도록 설계하였다.

• 한국지반공학회논문집
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• 제32권7호
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• pp.47-56
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• 2016

연약지반을 매립한 지반에 굴착을 시행할 경우 흙막이 벽체를 설치하더라도 굴착에 따른 굴착배면 지반의 지하수 유출로 배면지반에 지반파괴가 발생한다. 이를 최소화하기 위해 지반파괴 저감 대책으로 억지말뚝을 적용한 실내모형 실험을 시행하여 무보강일 경우와 억지말뚝 보강시를 비교하여 침하량이 약 3배 정도 차이가 발생하는 보강효과를 확인하였다(Kim, 2014). 금번 연구에서는 이런 억지말뚝의 보강효과 확인에 따른 적정한 억지말뚝 간격비의 평가를 시행하였다. 말뚝 간격비를 0.66(억지말뚝 5개)과 0.76(억지말뚝 3개)로 구분하여 실험한 결과 억지말뚝 적용이 굴착시 지반파괴 저감에 대하여 효과는 있으나 일정간격 이상 좁은 경우 오히려 하중으로 작용할 수 있어 설계시 적절한 간격비의 조정이 필요함을 알 수 있었으며, 본 연구에서는 지반파괴의 저감효과가 있으면서 굴착배면의 하중으로도 작용하지 않는 적정 간격비는 0.7~0.8 정도가 적합하다고 판단되었다.

• 전자공학회논문지
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• 제50권10호
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• pp.31-40
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• 2013

본 논문에서는 실내 근거리 무선 통신에 적합하고 대역폭 효율을 향상시키는 공간 변조(spatial modulation) 다중 안테나 시스템을 제안한다. 기존의 공간 변조 다중 안테나 시스템은 다중 송신 안테나 중 하나의 안테나를 사용하여 채널 간에 간섭을 피할 수 있어서 다중 경로가 많은 실내 환경에서 적합하다. 그러나 심벌 전송 구간마다 한 개의 안테나만을 선택하여 전송하므로 다중 안테나의 최대 부호 이득을 얻을 수 없다. 이를 극복하기 위하여 시공간블록부호화 방식을 적용한 공간 변조 다중 안테나 시스템은 두 개의 안테나를 사용하여 수신 성능을 향상시키지만 대역폭 효율이 향상되지 않는 단점이 있다. 본 논문에서는 골든 부호(Golden code)를 적용한 공간 변조를 제안하여 공간 변조 다중 안테나 시스템의 수신 성능과 대역폭 효율을 개선한다. 그리고 컴퓨터 모의실험을 통하여 기존 시스템과 제안하는 시스템의 성능을 비교 평가한다.

• 한국가구학회지
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• 제26권1호
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• pp.77-91
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• 2015

The appeal of sauna is caused by the fact that through that, one can feel Korea's unique temperament and culture; however, because of its being a public facility and flooding of businesses due to excessive supplies of various additional features such as washing, playing, eating, sleeping and health care functions, issues of social resources and environment come to the fore, so it has reached a situation of red ocean that it is difficult to enter the market anymore. Taking these into account, this study focused on developing a thermal technology and design of the housing of an environment-friendly mobile home sauna, making the most use of the sauna's fundamental purpose and settling it as a tourist product, analyzing the marketing research on the existing sauna and considering the recent housing trends and lifestyles for a new concept sauna. Thus, regarding its characteristics and utilization, it was designed smaller than $10m^2$ (3 pyeong) so that it would be easy to install in any space and convenient to move. It can be installed in separate buildings and rest spaces such as country houses, resorts, pensions, camping grounds as well as outdoor houses, custom produced for a measure of pyeong that customers want so as to match up with the Enforcement Ordinance of the Agricultural Land Act in a concept of the farmer's hut and kitchen, bathroom and bathroom can be installed inside according to an option. In addition, regarding its efficacy, in order to give environment-friendly healing effects, materials such as Hinoki Cypress, red clay and hardwood charcoal were used, a fixed indoor temperature of $70{\sim}100^{\circ}C$ was maintained by heating methods such as electromagnetic wave free, energy saving and low-power boiler, and it was made to have excellent effects on fatigue recovery, relieving stress, skin care and diet through far-infrared emission.

• 한국임상수의학회지
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• 제17권1호
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• pp.88-92
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• 2000

In Everland Zoological Gardens, the mortality by extrinsic cause in non-human primates during 1976∼1999 were retrospectively analyzed based on the clinical charts and/or autopsy reports. The number of deaths from extrinsic factor was 61 among a total of 161 monkeys which were died during that period. Among 61 monkeys of death from extrinsic factor, the number at a detailed cause were as follows: strangulation, 17(27.87%); accident fall, 15(24.59%); suffocation, 13(21.31%); drowning, 7(11.48%); death from pressure, 2(3.28%); collision, 2(3.28%); sunstroke, 1(64%); starvation, 1(1.64%); freezing to death, 1(1.64%); contusion, 1(1.64%). The number of deaths from extrinsic factor was 39 among a total of 81 squirrel monkeys which were died during that period. Among 39 squirrel monkeys of death from extrinsic factor, the number at a detailed cause were as follows; suffocation, 11(28.21%); accident fall, 8(20.51%); strangulation, 7(17.95%); drowning, 7(17.95%); death from pressure, 2(5.13%); starvation, 1(2.56%); collision, 1(2.56%). The number of deaths from extrinsic factor was 14 among a total of 50 Japanese macaque died during that period. Among 14 Japanese macaque from extrinsic factor, the number at a detailed cause were as follows; strangulation, 7(50.55%); accident fall, 6(42.85%); suffocation, 1(7.14%). It was considered that far facilities, adequate space and suitable indoor temperature are needed for the prevention of deaths of extrinsic cause at the monkey raising in zoological gardens or research center.

• 한국실내디자인학회논문집
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• 제19권4호
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• pp.48-57
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• 2010

Nowadays, public rental apartments' community facilities emphasize only their quantity aspect without considering residents' characteristics, leading their installation regulations to be based on only the number of households, which is problematic. As a result, in many cases, residents, after moving in, alter the facility usage or remodel the facilities for their use. Hereby, this study conducted focus group interviews with public rental apartments' residents as to find out space conditions of and improvement demands for the community facilities. Two public rental apartment complexes in Seoul and Gyeongi-do which were built after 2007 were selected for this study. As for the survey method, workshop panel was employed. Four people in each age class of infants, children, adolescents, adults, and seniors were formed into one group, and a total of 40 people in 10 groups were surveyed. The survey was continuously conducted from February to March in 2009. The study findings can be summarized as follows. 1) Among community facilities, there were more satisfactory outdoor facilities than satisfactory indoor facilities. Residents expressed satisfaction with the facilities linked with natural environment. The causes of unsatisfactory facilities were mostly poor management. 2) The facilities demanded by the residents included ones relevant to study, exercise, and hobbies. As public rental apartments are resided mostly by low-income families, study and hobby activities bring them cost problems. Therefore, it is needed that the apartment complexes support diverse such activities 3) As for facilities demanded for usage alteration, a residents' meeting room accounted for the most popular opinions. As it was used only once a week, its usage was very low. It should be opened to the residents and allowed to be used in various ways. 4) As for demands of changing spatial characteristics, outdoor exercise facilities accounted for the most opinions. Although they were installed in most cases, they were damaged and poorly managed, therefore being in need of improvement in operation and management. In order to maximally utilize public rental apartments' community facilities, facility planning in consideration of various age groups from residents' viewpoint and sustainable systematic management are required.

• 한국전자통신학회논문지
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• 제11권12호
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• pp.1201-1208
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• 2016

RFID(: Radio Frequency Identification)기술은 무선통신 기술이 발전하면서, 그 응용분야가 산업 전반에 걸쳐 확대되었다. RFID 기술의 대표적 응용 분야로는 의료, 물류, 유통 등이 있으며, 라디오파를 이용하기 때문에 비접촉 환경에의 사용이 용이하다. 최근 들어 RFID를 사용하여 건축자재의 재고 관리를 위한 자재관리 시스템의 구축사례가 증가 하고 있지만, 자재의 재사용에 관한 관련 연구나 실험은 미비한 상태이다. 본 논문에서는 기존의 재고관리 시스템의 재고관리 기능에, 자재의 재사용을 효과적으로 관리할 수 있는 위치추정 유닛이 탑재된 RFID 시스템을 제안한다. 제안된 시스템은 RFID 리더부와 저장부로 구성되고, 자재 위치정보는 RFID 리더의 위치를 추정하여 획득하게 된다. 리더의 위치추정을 위한 거리 값은 Zigbee의 RSSI(: Received Signal Strength Indicator)값을 활용하여 계산되며, $5m{\times}5m$의 실내공간에서 제안한 시스템의 위치추정 성능평가를 진행 하였다.

• 한국안전학회지
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• 제9권1호
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• pp.134-139
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• 1994

In order to assess the level of atmospheric pollution and to contribute the hearth improvement of residents in Taejon city, the authors were measured the concentration of air pollutants(CO, SO$_2$, NO$_2$, TSP, Pb, Cd, Cr) at three places of the control road in Taejon. The investigative research performed bimonthly from May 1993 to September 1993, and the places were the underground shopping stores of Taejon station, Dongyang department store and provincial goverment areas. The results of statistical analysis are as followings. \circled1CO :0.569~0.966ppm \circled2SO$_2$：0.084~0.170ppm \circled3NO$_2$:0.0045~0.022ppm \circled4TSP：249~299$\mu\textrm{g}$/㎥. \circled5Pb :0.366~1.157$\mu\textrm{g}$/㎥. \circled6Cd：0.016~0.025$\mu\textrm{g}$/㎥. \circled7 Cr : 0.198 ~0.290$\mu\textrm{g}$/㎥. The mean concentration of SO$_2$in Dongyang department store area was 0.17ppm, and it exceeded the ambient air quality standard by 0.02ppm. The concentration of TSP was higher than a standing rule of public hygiene, and it was very near to a standing rule of environmental preservation. The standing rule of indoor air pollution in underground shopping store have two different laws, the public hygiene and the environmental preservation. Therefore, it was difficult to judge what to do in such circumstance. In regarding to the laws, an environmental standard for air pollution in the underground space must unify into the standard of public hygiene.

• 터널과지하공간
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• 제26권4호
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• pp.253-265
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• 2016

본 연구에서는 reverse RFID 시스템을 이용하여 지하광산 현장에 투입되는 장비들의 이동시간을 측정하였다. Reverse RFID 시스템에서는 리더기와 안테나가 광산 장비에 탑재되며 태그는 지하광산의 갱도에 부착된다. 실내 모사실험을 통해 장비에 설치되는 RFID 리더기의 송출 전력 크기에 따라 상이하게 나타나는 태그 인식범위와 태그 인식률의 변화를 파악하였다. 그 결과 리더기의 송출 전력 크기가 작아질수록 태그 인식 범위가 좁아져 정밀한 이동시간 측정이 가능해졌으나, 태그 인식률은 떨어지는 것을 확인할 수 있었다. 현장실험 결과 본 연구에서 사용한 RFID 장비의 경우 송출 전력을 28 dBm으로 설정하는 것이 태그의 인식률을 유지하면서 측정오차를 줄일 수 있는 것으로 나타났다. 또한, 현장 실험 결과를 통해 reverse RFID 시스템이 지하광산에서 운반 트럭의 이동시간 측정자료 수집을 위해 성공적으로 사용될 수 있음을 확인할 수 있었다.