• 한국환경보건학회지
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• 제38권3호
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• pp.223-232
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• 2012

Objective: We performed this study to determine the association between childhood asthma and residential environment risk factors including VOCs and formaldehyde exposure. Methods: We selected an asthma group (30) and a control gorup (30) through physicain diagnosis and assessed the VOCs and formaldehyde levels of exposure of elementary school children in Seoul. Results: In the results, there were no significant differences in socioeconomic factors between case and control groups. However, there were significant differences in family asthma history, amount of sunlight, level of humidity and number of household residents (p < 0.05). The level of VOC (toluene, ethylbenzene, stylene, m,p-xylene) exposure level of the case group was significantly higher than that of the control group (p < 0.05) and the result of logistic regression showed that asthma family history, amount of humidity and number of household residents were significant predictors of childhood asthma (p < 0.05). Conclusion: Some residential environments such as lower amounts of sunlight, greater amounts of humidity and smaller numbers of household residents and VOC exposure were determinded as risk factors for childhood asthma.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.III
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• pp.676-683
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• 2000

For high quality storage of agricultural products, temperature, humidity and gas conditions in a storage house should be controlled properly. But most of the low temperature storage house is depending on temperature control. This study aimed to develop an automatic control system for low temperature storage house that can control storage conditions such as temperature, humidity and $CO_2$ gas concentration. The developed system alarms the user, by telephone or beeper, when abnormal condition has occurred. The farmer can also monitor the inside condition of warehouse in his residence, by Internet. From the results of the performance test, the temperature and relative humidity in the warehouse is controlled within the range of ${\pm}0.5^{circ}C$ and ${\pm}2%$, respectively.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2004년도 전력전자학술대회 논문집(1)
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• pp.172-176
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• 2004

In this paper, We are inclined to design automated mushroom-cultivation system technology grafting communication technology as CAN(Control Area Network). Mushroom cultivation automated system have a goal to construct stable crop cultivation system ,as we construct embedded-system that can make into one to advance current system. Its sensor part is composed of temperature , humidity and CO2 concentration sensor and of chilling, heating and unit humidity-controlling unit, ventilation fan. In particular, having saved analized temperature, humidity, CO2 concentration data in each sensor, CAN which can control realtime communication is used to analyze the next mushroom-cultivation.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2009년도 제33회 추계학술대회논문집
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• pp.403-406
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• 2009

본 연구는 MIL-HDBK-310을 기준으로 한 고도별 대기상태 즉, 온도, 습도 및 압력을 모사하여 고도에 따른 피시험물의 성능을 MIL-STD-810F 및 AIAA-2466에서 정한 시험 절차에 따라 평가하는 챔버를 개발하는 것이다. 이를 위한 대기차단 구조물, 시험부 및 공기순환유로, 고도모사 배기장치, 온도제어장치, 습도제어장치 및 설비제어장치 등을 설계하는데 고려하여야 할 사항을 기술하였다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.1126-1135
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• 1996

This study was conducted to select the sensors for measuring temperature, relative humidity, and air velocity among the major environmental factors affecting the pig productivity as a part of the study for the optimum production system model development of pig-housing. The study results are summarized as the follows : Two sensors , HMP233L and HANI, were tested for measuring temperature and relative humidity , Test results were analyzed by the statistical methods. And the sensor, HMP233L was selected as a proper sensor for temperature sand relative humidity measurement . An air velocity sensor was tested. Test results showed that its accuracy was low and incongruent for the air velocity measurement when it was lower than 4m/s.

• 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.

• 제어로봇시스템학회논문지
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• 제8권11호
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• pp.948-953
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• 2002

The electric power load during the peak time in summer is strongly affected by cooling load, which decreases the preparation ratio of electricity and brings about the failure in the supply of electricity in the electric power system. The ice-storage system and heat pump system are possible solutions to settle this problem. In this study. the method of estimating temperature and humidity to forecast the cooling load of ice-storage system is suggested, then the method of forecasting the cooling load using fuzzy logic is suggested by simulating that the cooling load is calculated using actual temperature and humidity. The forecast of the temperature, humidity and cooling load are simulated, and it is shown that the forecasted data approach to the actual data. Operating the ice-storage system by the forecast of cooling load with night electric power will improve the ice-storage system efficiency and reduce the peak electric power load during the summer season as a result.

• International Journal of Air-Conditioning and Refrigeration
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• 제11권4호
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• pp.199-208
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• 2003

Standard temperature and absolute humidity weather data correlations of Seoul for dynamic energy simulation have been developed regressing the measured data compiled by the Korea Meteorological Adminstration during a l0-year period from 1991 to 2000. The mathematical equations can generate consistent daily and yearly variations of outdoor weather data unlike the measured data which may show abnormal behavior. Considering that each hour of the day follows a certain yearly pattern, 24 correlations are developed for each hour of the day. The derived simple mathematical equations can be used for estimating outdoor temperature and humidity conditions for any arbitrary time of the year.

• 공업화학
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• 제34권3호
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• pp.241-246
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• 2023

Fuel cells are one of the renewable energy sources that have sparked a lot of scientific attention for solving problems related to the energy crisis and environmental pollution. One of the most crucial subjects concerning the utilization of fuel cells is modeling. Therefore, an analytical steady-state and dynamic fuel cell model was described in this study. The parameter for the identification process was investigated, and the MATLAB/Simulink implementation was demonstrated. A 15-W proton exchange membrane fuel cell was used to apply the suggested modeling methodology. Comparing experimental and simulation findings indicated that the model error was constrained to 3%. This study showed that temperature and humidity affect fuel cell performance.

• 생물환경조절학회지
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• 제11권1호
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• pp.1-4
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• 2002

'황금배' 동녹발생이 해에 따라 큰 차이를 보이는 것은 강우가 크게 관여하기 때문인 바 본 연구에서는 강우와 동녹발생과의 관계를 구명하기 위하여 인위적으로 가습처리를 하여 높은 상대습도와의 관계를 구명하였다. 높은 상대습도는 기공저항을 적게 하였다. 따라서 순수동화산물의 축적이 과실의 비대를 촉진하여 가습처리에서 평균 과중이 크게 나타났다 광합성속도에는 처리간의 차이가 없었다. 동녹 발생시기는 과중과 과실표면적의 신장속도가 가장 빠른 시기인 7월 25일 전후이며, 높은 상대습도가 과실의 신장을 촉진하였으므로 가습처리에서 동녹발생이 많았다. 7월 하순은 과실의 칼슘농도변화가 큰 시기로서 세포벽 구성에 주요한 물질인 칼슘량의 저하가 동녹발생과 상관이 있을 것으로 생각된다. 강우에 의한 높은 상대습도가 동녹발생에 미치는 영향은 높은 상대습도에 의해 순수광합성물질의 많아지고 이에 따라 과실신장이 빨라지나 과실세포의 신장을 위해 전류되는 동화산물량과 이동되는 수분 포함한 무기성분량의 일시적 불균형이 큰 이유 중의 하나라고 생각된다.