| 1. |
- Yang, Bin, et al.
(author)
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Real-time and contactless measurements of thermal discomfort based on human poses for energy efficient control of buildings
- 2019
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In: Building and Environment. - : Elsevier. - 0360-1323 .- 1873-684X. ; 162
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Journal article (peer-reviewed)abstract
- Individual thermal discomfort perception gives important feedback signals for energy efficient control of building heating, ventilation and air conditioning systems. However, there is few effective method to measure thermal discomfort status of occupants in a real-time and contactless way. A novel method based on contactless measurements of human thermal discomfort status was presented. Images of occupant poses, which are related to thermoregulation mechanisms, were captured by a digital camera and the corresponding 2D coordinates were obtained. These poses were converted into skeletal configurations. An algorithm was developed to recognize different poses related to thermal discomfort, such as hugging oneself or wiping sweat off the brow. The algorithm could recognize twelve thermal discomfort related human poses. These poses were derived from a questionnaire survey of 369 human subjects. Some other human subjects participated in the validation experiments of the proposed method. All twelve thermal discomfort related poses can be recognized effectively.
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| 2. |
- Zhang, Shuo, et al.
(author)
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Tolerance of the Nanocellulose-Producing Bacterium Gluconacetobacter xylinus to Lignocellulose-Derived Acids and Aldehydes
- 2014
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In: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 62:40, s. 9792-9799
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Journal article (peer-reviewed)abstract
- Lignocellulosic biomass serves as a potential alternative feedstock for production of bacterial nanocellulose (BNC), a high-value added product of bacteria such as Gluconacetobacter xylinus. The tolerance of G. xylinus to lignocellulose derived inhibitors (formic acid, acetic acid, levulinic acid, furfural, and S-hydroxymethylfurfural) was investigated. Whereas 100 mM formic acid completely suppressed the metabolism of G xylinus, 250 mM of either acetic acid or levulinic acid still allowed glucose metabolism and BNC production to occur. Complete suppression of glucose utilization and BNC production was observed after inclusion of 20 and 30 mM furfural and 5-hydroxymethylfurfural, respectively. The highest yields observed were 88% for furoic acid/furfural and 76% for 5-hydroxymethyl-2-furoic acid/5-hydroxymethylfurfural. These results are the first demonstration of the capability of G. xylinus to tolerate lignocellulose derived inhibitors and to convert furan aldehydes.
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