• Tribology and Lubricants
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• 제15권1호
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• pp.29-38
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• 1999

In recent years, the tribological behavior of coated ceramic material has been the issue of much interest. Particularly, the understanding of the tribological performance of thin film under light load is important for its potential in applications of MEMS. The friction and wear behavior of ceramic material that occur at light load depends on several factors such as surface roughness, contact area and material properties. In this work, the tribological behavior of coated silicon under light load and low speed was investigated. Particularly, the effects of coated materials, humidity and undulated surface were also studied. The results show that the effect of humidity on fiction was influenced by the apparent area of contact between the two surfaces. Also both adhesive and abrasive wear occurred depending on the sliding condition. Finally, undulations on the silicon wafer were found to be effective in trapping wear particles and resulted in the reduction of friction.

• KIEAE Journal
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• 제10권6호
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• pp.67-72
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• 2010

This study was conducted to examine the change of heating environment with the creation of an indoor water space. Living environments and comfort of dwellers can be improved by utilizing the physical properties of water effectively. This study focuses on the basic examination of the effect of water space and the environmental effects of water space by experiment. Two identical models were fabricated to compare the changes in indoor temperature and humidity with and without a water space. With the water space, temperature was reduced by an average of $0.55^{\circ}C$ a day and moisture content increased by an average of 4%. As a result, it was possible to obtain quantitative data on water space's temperature reduction and humidity control capacities. This study is expected to provide basic information for further studies on the effect of water spaces in various buildings.

• 전기전자학회논문지
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• 제25권1호
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• pp.47-52
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• 2021

고주파 마그네트론 스퍼터링으로 증착된 ~185 nm 두께의 ITO막을 습도 100%에서 열처리하였다. 온도 200 ℃, 250 ℃, 300 ℃, 350 ℃, 400 ℃ 및 450 ℃에서 각각 4시간 동안 열처리하였다. 고습 열처리에 따른 저항률, 전자농도 및 이동도 변화를 조사하였다. XRD결과로 스트레스 변화를 계산하였으며, FESEM 사진을 통해 ITO막의 표면형상을 관찰하였다. 광투과율을 측정한 후 에너지 밴드 갭을 구하였으며, Burnstein-Moss 효과와 비교 및 분석하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.377-378
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• 2023

This study examined the effect of curing conditions on the compressive strength of dry mortar for floor. The compressive strength according to the relative humidity during curing was compared, and the influence of expansive additives on compressive strength under water curing was reviewed. As a result, low relative humidity conditions during curing was not effective in improving the compressive strength of dry mortar for floor, and it was judged that the continuous hydration reaction insufficient due to lack of the moisture supply. In order to improve compressive strength, high relative humidity maintenance was found to be an important factor. However, under water curing conditions, the compressive strength has decreased as a result of continuous volume expansion due to the use of the expansive additives.

• 한국임상보건과학회지
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• 제11권1호
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• pp.1616-1624
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• 2023

Purpose. The purpose of this study was to investigate the effect of changes in tear break-up time, accommodative response amount, and accommodative microwave on the eyes due to changes in humidity. Methods. A total of 48 adult men and women in their 20s (21.1±1.56 years old) were surveyed on dry eye questionnaires (OSID questionnaires), tear destruction time was measured by humidity (40%, 60%, 80%), and controlled reactions and controlled fine waves were measured through tactile tests. Result. As a result of the OSID questionnaire, there were 10 normal patients, 8 mild dry eyes, 1 moderate dry eye, and 5 severe dry eyes. The initial tear film destruction time was 7.34±4.67 seconds at 40% humidity, 8.99±4.75 seconds at 60% humidity, 10.26±4.52 seconds at 80% humidity, and the average tear film destruction time was 9.51±4.07 seconds at 40% humidity, 10.99±3.82 seconds at 60% humidity, and 12.05±3.42 seconds at 80% humidity. The accommodative response was -0.41~1.79D at 40% humidity, -0.34~1.79D at 60% humidity, and -0.30~2.01D at 80% humidity. The accommodative microwave was measured as 56.39~63.43dB when it was 40%, 56.41~62.64dB when it was 60%, and 55.96 ~61.13dB when it was 80%. Conclusion. As the humidity (40~80%) increased, the tear break-up time increased, and as the accommodative stimulus amount increased, the accommodative response amount increased. It was found that the accommodative microwave according to the amount of accommodative stimulation increased, and as the humidity increased, the accommodative microwave decreased.

• International Journal of Industrial Entomology and Biomaterials
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• 제6권2호
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• pp.197-202
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• 2003

The hot climatic conditions prevailing particularly in summer are not conducive to rear these high yielding bivoltine hybrids throughout the year, In order to select efficiently the breeds with high temperature tolerance, it is very important to analyze critically the impact of high temperature on many silk yielding attributes of silkworm races. Keeping the above in view, the present study was undertaken to determine the effect of high temperature $(36 {\pm} 1^{\circ}C)$ and high humidity $(80 {\pm} 5% Relative Humidity)$ on the rearing performance of pure races, foundation crosses, single hybrids and double hybrids of bivoltine silkworm, Bombyx mori L. The robust bivoltine breeds, CSR18, CSR19, 8HT and 5HT, eight foundation crosses, eight single hybrids and eight double hybrids involving these breeds were chosen as materials in this study.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 추계학술대회 논문집 학회본부
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• pp.427-429
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• 1995

In this paper, the effect of alkaline oxides on the humidity sensitivity of $V_2O_5$(2mol%)-doped $TiO_2$(98mol%) was investigated as functions of $Li_2CO_3$, $K_2CO_3$, additives (x= 0.0 mol%, 1mol%, 2mol%, 5mol%, 10mol%). 1. The porosity and total intrusion volume of sample containing 1, 2, 5mol% $K_2O$ was increased, and then those of 10mol% $K_2O$ was reduced again. 2. The humidity sensitivity of samples containing 1, 2, 5, 10mol% $K_2O$ were good generally. Especially the sample containing 5mol% $K_2O$ were the better. 3. the stability of the humidity sensitivity of samples containing $K_2O$ at low and high temperatures is very good.

• 한국식품과학회지
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• 제20권4호
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• pp.553-557
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• 1988

저장습도가 크랙카의 texture 특성에 미치는 영향을 규명하기 위하여 관능검사법과 texturometer를 이용한 기계적 측정법을 병행시켜 실험하였다. 국내산 크랙카 제품을 23%, 31%, 51% 79%의 상대 습도에서 1주와 3주간 저장한 결과 일반적으로 저장습도가 증가함에 따라 texture 특성인 crispness의 감소를 나타냈으며 저장기간은 큰 영향을 주지 못했다. 국내산과 외국산 크랙카를 상대습도 31%와 79%에서 1주와 3주간 저장하면서 texture의 변화를 비교한 결과 제품간에 유의적인 차이를 나타내지 않았다.

• 한국신뢰성학회지:신뢰성응용연구
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• 제6권2호
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• pp.173-186
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• 2006

This paper presents a study on the failure mechanism for optical engine of Projection TV. The lenses of which optical engine composes are failed by various environmental conditions, that is, thermal effect, moisture effect, mechanical shock or chemical effect. By surveying on actual TV working condition, the major factor of failure was turned out the thermal effect. Because the actual surface temperature of optical engine rose at max. $51^{\circ}C$ during it worked, the relative humidity around optical engine was kept at less than 20% that is difficult to do chemical reaction with humidity. Therefore we can make a conclusion that the major failure of optical engine resulted from thermal effect.

• 한국조경학회지
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• 제37권4호
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• pp.94-99
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• 2009

본 연구는 하이드로컬쳐 실내녹화방법을 실내습도 개선의 중요한 수단으로 활용하기 위해, 관엽식물로 매우 보편화된 스킨답서스(Scindapsus aureus)와 싱고늄(Syngonium podophyllum)을 대상으로 하이드로컬쳐 식재 부피비율인 2%, 3%, 5% 차이와 3%의 동일한 하이드로컬쳐 식재대에서의 화분용토, 식물종의 차이에 따른 실내습도 변화를 실측하였으며, 그 결과는 다음과 같다. 하이드로컬쳐 부피비율에 따른 습도 변화에 있어서 스킨답서스의 경우, 식물이 투입하지 않았던 대조구에 비해 식물이 있는 생장상 내 상대습도가 높았다. 특히, 식물과 식재대의 용적비율이 높아질수록 습도가 높아졌다. 상대습도 25%인 대조구에 비해, 2%는 40%를, 3%는 45%를, 5%는 50%로 측정되었다. 싱고늄은 하이드로컬쳐 부피비율 2%는 40%를, 3%는 44%를, 5%는 46%로 각각 나타내어 대조구인 25%의 상대습도보다는 높았으나 부피비율에 따른 상대습도 차이는 확연하지 않았다. 하이드로컬쳐 식재대 내의 화분용토와 식물종에 따른 상대습도 변화를 살펴보면, 대조구인 하이드로볼 식재대 내의 하이드로볼 처리구에서 초기 상대습도가 다소 높았으나, 시간이 지남에 따라 물 식재대 내의 흙화분 처리구와 유사한 약 45%의 상대습도를 유지하였다. 물 식재대 내의 하이드로볼 처리구에서 상대습도가 약 30%로 나타났으며, 하이드로볼 식재대 내의 하이드로볼 처리한 산호수는 상대습도 약 38%로 측정되었다.