The Experts below are selected from a list of 291 Experts worldwide ranked by ideXlab platform
Baizhan Li - One of the best experts on this subject based on the ideXlab platform.
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Impact of Relative Humidity on thermal comfort in a warm environment
Indoor and Built Environment, 2013Co-Authors: Shenglan Jing, Meilan Tan, Baizhan Li, Hong LiuAbstract:Relative Humidity is an important environmental factor that could affect thermal comfort in a building. The influence of Relative Humidity on thermal comfort was studied in an environment chamber. Twenty subjects, ten males and ten females, were engaged in the study and were exposed to nine combinations of air temperature and Relative Humidity. Skin temperatures on different parts of the body were monitored, and their thermal sensation was evaluated by questionnaire while their thermal environments were measured during the chamber tests. These results were evaluated by statistical analyses which indicate that for higher temperature, Relative Humidity could have a significant effect on skin temperature and thermal sensation. Higher Humidity could cause a negative effect on the subject’s thermal comfort. To avoid causing discomfort, the Relative Humidity limit should be taken into consideration and there should be a Humidity limit specified by the appropriate building code for the acceptable air temperature range to allow an appropriate control of indoor environment.
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Impact of Relative Humidity on Thermal Comfort in a Warm Environment
Indoor and Built Environment, 2012Co-Authors: Shenglan Jing, Baizhan LiAbstract:Relative Humidity is an important environmental factor that could affect thermal comfort in a building. The influence of Relative Humidity on thermal comfort was studied in an environment chamber. Twenty subjects, ten males and ten females, were engaged in the study and were exposed to nine combinations of air temperature and Relative Humidity. Skin temperatures on different parts of the body were monitored, and their thermal sensation was evaluated by questionnaire while their thermal environments were measured during the chamber tests. These results were evaluated by statistical analyses which indicate that for higher temperature, Relative Humidity could have a significant effect on skin temperature and thermal sensation. Higher Humidity could cause a negative effect on the subject’s thermal comfort. To avoid causing discomfort, the Relative Humidity limit should be taken into consideration and there should be a Humidity limit specified by the appropriate building code for the acceptable air temperature...
Jun Qian - One of the best experts on this subject based on the ideXlab platform.
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The impact of Relative Humidity and atmospheric pressure on mortality in Guangzhou, China.
Biomedical and Environmental Sciences, 2014Co-Authors: Chun-quan Ou, Qiao Qun Ou, Ping Yan Chen, Jun Yang, Jun QianAbstract:Objective Although many studies have examined the effects of ambient temperatures on mortality, little evidence is on health impacts of atmospheric pressure and Relative Humidity. This study aimed to assess the impacts of atmospheric pressure and Relative Humidity on mortality in Guangzhou, China. Methods This study included 213,737 registered deaths during 2003-2011 in Guangzhou, China. A quasi-Poisson regression with a distributed lag non-linear model was used to assess the effects of atmospheric pressure/Relative Humidity. Results We found significant effect of low atmospheric pressure/Relative Humidity on mortality. There was a 1.79%(95% confidence interval: 0.38%-3.22%) increase in non-accidental mortality and a 2.27%(0.07%-4.51%) increase in cardiovascular mortality comparing the 5th and 25 th percentile of atmospheric pressure. A 3.97%(0.67%-7.39%) increase in cardiovascular mortality was also observed comparing the 5th and 25 th percentile of Relative Humidity. Women were more vulnerable to decrease in atmospheric pressure and Relative Humidity than men. Age and education attainment were also potential effect modifiers. Furthermore, low atmospheric pressure and Relative Humidity increased temperature-related mortality. Conclusion Both low atmospheric pressure and Relative Humidity are important risk factors of mortality. Our findings would be helpful to develop health risk assessment and climate policy interventions that would better protect vulnerable subgroups of the population.
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The impact of Relative Humidity and atmospheric pressure on mortality in Guangzhou, China.
Biomedical and environmental sciences : BES, 2014Co-Authors: Chun-quan Ou, Qiao Qun Ou, Hua Zhang Liu, Guo Zhen Lin, Ping Yan Chen, Jun Qian, Jun Yang, Yu Ming GuoAbstract:OBJECTIVE Although many studies have examined the effects of ambient temperatures on mortality, little evidence is on health impacts of atmospheric pressure and Relative Humidity. This study aimed to assess the impacts of atmospheric pressure and Relative Humidity on mortality in Guangzhou, China. METHODS This study included 213,737 registered deaths during 2003-2011 in Guangzhou, China. A quasi-Poisson regression with a distributed lag non-linear model was used to assess the effects of atmospheric pressure/Relative Humidity. RESULTS We found significant effect of low atmospheric pressure/Relative Humidity on mortality. There was a 1.79% (95% confidence interval: 0.38%-3.22%) increase in non-accidental mortality and a 2.27% (0.07%-4.51%) increase in cardiovascular mortality comparing the 5th and 25th percentile of atmospheric pressure. A 3.97% (0.67%-7.39%) increase in cardiovascular mortality was also observed comparing the 5th and 25th percentile of Relative Humidity. Women were more vulnerable to decrease in atmospheric pressure and Relative Humidity than men. Age and education attainment were also potential effect modifiers. Furthermore, low atmospheric pressure and Relative Humidity increased temperature-related mortality. CONCLUSION Both low atmospheric pressure and Relative Humidity are important risk factors of mortality. Our findings would be helpful to develop health risk assessment and climate policy interventions that would better protect vulnerable subgroups of the population.
Jon O. Hellevang - One of the best experts on this subject based on the ideXlab platform.
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A fully distributed fibre optic sensor for Relative Humidity measurements
Sensors and Actuators B: Chemical, 2017Co-Authors: Peter J. Thomas, Jon O. HellevangAbstract:In this paper we describe the characteristics of a 64-m-long distributed Relative Humidity sensor with cm spatial resolution. The sensing element is an optical fibre with a hygroscopic coating that undergoes a reversible expansion on water uptake, thereby transferring a strain on the fibre. The resulting distributed strain profile was interrogated using Rayleigh backscatter based optical frequency domain reflectometry. Investigations of the distributed sensor under controlled Relative Humidity and temperature were carried out. The distributed sensor is strongly Humidity sensitive when polyimide coated fibre is used, and only weakly sensitive when acrylate coating is used. When using polyimide coated fibre the distributed sensor shows a near linear response across the entire range of Relative Humidity tested covering 15–92%, with a sensitivity ∼1.3�μe/%RH and showing low hysteresis. The system is able to resolve Relative Humidity changes ∼0.1%. The response time of the sensor was found to be strongly dependent on temperature in the range tested, covering 30–50��C. Using reference temperature and Humidity measurements, it was demonstrated that the distributed sensor accurately reported the combined effects of temperature and Humidity variations over a cm spatial scale.
Shenglan Jing - One of the best experts on this subject based on the ideXlab platform.
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Impact of Relative Humidity on thermal comfort in a warm environment
Indoor and Built Environment, 2013Co-Authors: Shenglan Jing, Meilan Tan, Baizhan Li, Hong LiuAbstract:Relative Humidity is an important environmental factor that could affect thermal comfort in a building. The influence of Relative Humidity on thermal comfort was studied in an environment chamber. Twenty subjects, ten males and ten females, were engaged in the study and were exposed to nine combinations of air temperature and Relative Humidity. Skin temperatures on different parts of the body were monitored, and their thermal sensation was evaluated by questionnaire while their thermal environments were measured during the chamber tests. These results were evaluated by statistical analyses which indicate that for higher temperature, Relative Humidity could have a significant effect on skin temperature and thermal sensation. Higher Humidity could cause a negative effect on the subject’s thermal comfort. To avoid causing discomfort, the Relative Humidity limit should be taken into consideration and there should be a Humidity limit specified by the appropriate building code for the acceptable air temperature range to allow an appropriate control of indoor environment.
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Impact of Relative Humidity on Thermal Comfort in a Warm Environment
Indoor and Built Environment, 2012Co-Authors: Shenglan Jing, Baizhan LiAbstract:Relative Humidity is an important environmental factor that could affect thermal comfort in a building. The influence of Relative Humidity on thermal comfort was studied in an environment chamber. Twenty subjects, ten males and ten females, were engaged in the study and were exposed to nine combinations of air temperature and Relative Humidity. Skin temperatures on different parts of the body were monitored, and their thermal sensation was evaluated by questionnaire while their thermal environments were measured during the chamber tests. These results were evaluated by statistical analyses which indicate that for higher temperature, Relative Humidity could have a significant effect on skin temperature and thermal sensation. Higher Humidity could cause a negative effect on the subject’s thermal comfort. To avoid causing discomfort, the Relative Humidity limit should be taken into consideration and there should be a Humidity limit specified by the appropriate building code for the acceptable air temperature...
R R Ahir - One of the best experts on this subject based on the ideXlab platform.
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role of temperature and Relative Humidity on mycelial growth of alternaria alternata infecting brinjal
Trends in Biosciences, 2013Co-Authors: Laxman Prasad Balai, R R AhirAbstract:Role of temperature and Relative Humidity was studied on brinjal pathogen Alternaria alternata under in vitro conditions. The mycelial growth of A. alternata is very much affected by temperature. Maximum mycelial growth was observed at 25°C. A gradual decrease in mycelial growth was observed at 30°C and 35°C, where as minimum mycelium observed as 10°C. The effect of Relative Humidity was studied by exposing the fungus to different levels viz., 50, 60, 70, 80, 90 and 100% and incubated at 25±1°C for 7 days. Maximum mycelial growth was recorded at 100% Relative Humidity which was closely followed at 90.0 per cent Relative Humidity. Minimum mycelial growth was observed at 50% Relative Humidity. It can be concluded that high Relative Humidity favors the growth of A. alternata.