• Journal of Oral Medicine and Pain
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• v.31 no.1
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• pp.47-57
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• 2006

The purpose of this study was to assess the effects of the superficial heat therapy on the cutaneous blood flow and the skin temperature at pre-auricular region. Two types of the superficial heat therapy-moist hot pack & infrared lamp- were applied to 20 healthy subjects(male: 10, female: 10). For each subject, the two parameters of cutaneous blood flow and skin temperature were measured before and after heat therapy, using laser doppler flowmetry(LDF). The author analyzed the differences of the effects between the two therapies and also characteristics of responsiveness between the two parameters. The results were as follows : 1. The two parameters were significantly increased after both superficial heat therapies. 2. Skin temperature showed a maximum peak immediately after both superficial heat therapies, but cutaneous blood flow showed a maximum peak 4 minutes after both superficial heat therapies. 3. Increased cutaneous blood flow after application of moist hot pack lasted longer than infrared lamp. 4. Increased skin temperature after both superficial heat therapies lasted for 60 minutes, but increased skin temperature after infrared lamp decreased more rapidly than moist hot pack. 5. Amount of changes in cutaneous blood flow after infrared lamp was larger in female than in male, but no significant gender difference was found since 20 minutes after infrared lamp. Both moist hot pack and infrared lamp showed favorable effectiveness in raising cutaneous blood flow and skin temperature. Moist hot pack was slightly superior in maintaining this effect.

• Journal of the Korean Wood Science and Technology
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• v.43 no.6
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• pp.798-803
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• 2015

This study was conducted to predict the effect of door opening in wooden cultural heritages (WCHs) on their conservation environment. For this prediction, measured relative humidity (RH) and surface wood moisture content (MC) of inner part of wood columns in open wooden building and neighboring closed wooden building were compared with minimum RH, including the duration of minimum RH, and MC required for spore germination and resultant growth of wood-degrading fungi reported in some literatures. Moisture conditions, namely RH of inside wooden building and MC of wood was unsuitable for decay and sap-stain fungi all the year round; however, moisture conditions during summer season was suitable for spore germination and resultant growth of surface mold fungi, regardless of door opening. When compared, the duration of minimum (75%) or higher RH and the number of wood columns with MC level greater than the minimum MC (15%) during summer season, the surface mold related to the conservation environment of inside wooden building was somewhat better in open building than in closed building. Rather, doors should be opened in closed building for reducing indoor RH as a necessary measure during summer season when outdoor RH is high.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.21 no.4
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• pp.236-242
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• 2009

In finishing work, defects are often taken place by many factors. One of them is the thermo-humidity condition on the work surface as coating and anointing adhesives. Thus, the condition of thermo-humidity on work surface should be checked prior to the finishing work. However, many construction companies show a tendency to overlook it because not only are measurement tools so expensive but they don't have skilled hands about those tools. Therefore, we propose the measurement method that makes it easy to recognize surface thermo-humidity condition so as to reduce constructional flaws. And then we test this product. The test progresses to four stages with various conditions. We evaluate its usefulness and application possibility of this product in the field.

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.127-127
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• 2007

• Proceedings of the KAIS Fall Conference
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• 2011.12b
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• pp.540-542
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• 2011

본 논문은 결로 방지 기능을 가진 배전반 개발을 위해 다양한 온습도 환경 조건에서 결로의 생성 및 제거에 관한 특성을 파악하였다. 획득된 결과는 외부 온도변화에 따라 배전반 내부의 온도도 변화되며, 내외부의 온도차는 일정한 차이를 나타내었다. 결로 생성의 특성은 초기에는 미세한 분무상에서 시간이 경과함에 따라 주위 물방울들과 결합하여 성장하며, 최종적으로는 표면장력이 작용하지만 중력에 의해 하부로 처지면서 떨어지는 과정으로 진행되었다. 또한 히터 등으로 결로 생성조건을 파괴시키면 생성시와 동일한 온습도 조건이 유지되어도 결로는 제거되는 것을 알 수 있었다.

• Proceedings of the Korean Vacuum Society Conference
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• 2014.02a
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• pp.150.2-150.2
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• 2014

한국항공우주연구원 우주환경시험팀에서는 인공위성의 조립 및 환경시험을 수행하고 있으며, 이를 위한 청정실을 운영하고 있다. 인공위성은 고 진공 및 고온, 극저온의 가혹한 우주환경에서 작동을 하기 때문에 위성표면에 흡착된 오염물질은 위성의 성능 및 효율의 저하를 초래할 수 있다. 또한, 특정 부품은 오랜 시간 높은 온도에서 노출되면 에이징에 의한 기능저하를 초래할 수 있으며, 낮은 습도는 작업 환경에 정전기를 유발하여 부품의 손상을 초래하며, 높은 습도는 부식을 야기할 수 있다. 이에 인공위성의 조립환경은 청정한 환경 및 적당한 온습도 유지가 필수적이다. 이에 본 논문에서는 한국항공우주연구원에서 수행하고 있는 청정실 유지 관리방안 및 공기 중 부유입자 측정원리에 대해 소개하고자 한다.

• Korean Journal of Agricultural and Forest Meteorology
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• v.8 no.4
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• pp.250-259
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• 2006

This study looks into forest fire occurrence hazards according to the change of temperature and humidity over thirty years at interval of ten days. We used data from the forest fire inventory from 1995 to 2004 and weather data such as average temperature and relative humidity for 30 years from 1971 to 2000. These data were expressed as a database with ten-day intervals for 76 weather stations. Forest fire hazards occurred in the spring season from the end of March to the middle of April. For the first step, the primitive surface of temperature and humidity was interpolated by IDW (the standard interpolation method). These thematic maps have a 1 km by 1 km grid spacing resolution. Next, we executed a simple regression analysis after extracting forest fire frequency, temperature and humidity values from 76 weather stations. The results produced a coefficient of determination ($R^2$) ranging from 0.4 to 0.6. Moreover, the estimation of forest fire occurrence hazards during early April was very high at Gyeongbuk Interior, Chungcheong Interior and part of Gangwon. The range of temperature and humidity having an influence on forest fire occurrence was as follows: average temperature and relative humidity in early April was $9-12^{\circ}C$ and 61-65%. At the end of March, temperature was $6-10^{\circ}C$, humidity 62-67%, and temperature was $11-14^{\circ}C$ and humidity 60-67% in the middle of April.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.32 no.9
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• pp.46-51
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• 2003

"환기"는 생활용품 등으로부터의 오염물질 및 불특정 물질의 농도 저감이 가능하기 때문에 Sick House 대책으로서의 중요한 대책기술이다. 본 고에서는 집합주택을 대상으로 한 중앙공조 환기방식 및 배기 중앙 환기방식의 사례를 보여주고, 시스템의 구성기술과 오염물질의 농도 저감효과에 대해서 기술한다. 또한, 대표적인 오염물질인 포름알데히드의 건자재로 부터의 발산량은 온습도, 환기량 및 건자재의 표면적 비율 등의 영향인자에 따라 변화하므로, 필요 환기량은 이들의 영향요인을 고려하여야 한다는 것을 기술한다.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.741-744
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• 2008

Quality control of early age concrete significantly influences the long term performance. Primary factors for early age concrete quality control should include the relative humidity and temperature variation, and these are more important as structures become massive and huge. Temperature raise due to cement hydration causes stress, which can develop to cracking with internal and/or external restraints. Exposure conditions including ambient temperature, humidity and wind also significantly affect the cracking behavior of early age concrete. Among many of studies on the early age concrete behavior, investigation on the variation of temperature and relative humidity internal of concrete is not common. That is in part because the difficulties in measuring the relative humidity and temperature inside the concrete. This study used a digital sensor with an appropriate logger to measure internal temperature and relative humidity. This direct measuring method is expected to provide more reliable and comprehensive data acquisition on the early age behavior of concrete.

• Magazine of the Korea Concrete Institute
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• v.4 no.1
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• pp.127-134
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• 1992

Generally speaking, the internal moisture of concrete is mainly distributed in inner part and concrete surface which is exposed are dned according to influence of temperature and humidity. So, the properties which are compressive strength, modular elasticity, and volume change are different at each part even in same concrete. This is because moisture distribution is changed according to the evaporation and move ment of moisture, exist in the inner porosity of concrete. Therefore, it is necessary that we investigate the properties of concrete according to moisture distribution. The purpose of this study is investigating correlation between the moisture content and mechanical properties in concrete. Compressive and tenslle strength decrease according to increasing moisture content, but modular elas ticity increase. Those increasing or decreasing ratio at drying ratio 100% (absolute dries) is as follows in comparative of drying ratio 0 % (saturated condition).tion).