The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Yutaka Tochihara - One of the best experts on this subject based on the ideXlab platform.
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Validity of perceived skin wettedness mapping to evaluate heat strain
European Journal of Applied Physiology, 2011Co-Authors: Kouhei Nakao, Yutaka TochiharaAbstract:The purpose of this study was to investigate the validity of a newly developed method for quantifying perceived skin wettedness ( W _p) as an index to evaluate heat strain. Eight male subjects underwent 12 experimental conditions: activities (rest and exercise) × clothing (Control, Tyvek and Vinyl condition) × air temperatures (25 and 32°C). To quantify the W _p, a full body map with 21 demarcated regions was presented to the subject. The results showed that (1) at rest in 25°C, W _p finally reached 4.4, 8.3 and 51.6% of the whole body surface area for Control, Tyvek, and Vinyl conditions, respectively, while W _p at rest in 32°C rose to 35.8, 61.4 and 89.8%; (2) W _p has a distinguishable power to detect the most wetted and the first wetted regions. The most wetted body regions were the upper back, followed by the chest, front neck, and forehead. The first perceived regions in the skin wetted map were the chest, forehead, and upper back; (3) W _p at rest showed a significant relationship with the calculated skin wettedness ( w ) ( r = 0.645, p
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Validity of perceived skin wettedness mapping to evaluate heat strain
European Journal of Applied Physiology, 2011Co-Authors: Joo-young Lee, Kouhei Nakao, Yutaka TochiharaAbstract:The purpose of this study was to investigate the validity of a newly developed method for quantifying perceived skin wettedness (Wp) as an index to evaluate heat strain. Eight male subjects underwent 12 experimental conditions: activities (rest and exercise) 9 clothing (Con- trol, Tyvek and Vinyl condition) 9 air temperatures (25 and 32?C). To quantify the Wp, a full body map with 21 demarcated regions was presented to the subject. The results showed that (1) at rest in 25?C, Wp finally reached 4.4, 8.3 and 51.6% of the whole body surface area for Control, Tyvek, and Vinyl conditions, respectively, while Wp at rest in 32?C rose to 35.8, 61.4 and 89.8%; (2) Wp has a distinguishable power to detect the most wetted and the first wetted regions. The most wetted body regions were the upper back, followed by the chest, front neck, and fore- head. The first perceived regions in the skin wetted map were the chest, forehead, and upper back; (3) Wp at rest showed a significant relationship with the calculated skin wettedness (w)(r = 0.645, p\0.01) and (4) Wp had a significant relationship with core temperature, skin tem- perature, heart rate, total sweat rate, thermal comfort, and humidity sensation (p\0.05), but these relationships were dependent on the level of activities and clothing insulation. Wp in hot environments was more valid as a heat strain index of workers wearing normal clothing in light works, rather than wearing impermeable protective clothing in strenuous works.
Kouhei Nakao - One of the best experts on this subject based on the ideXlab platform.
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Validity of perceived skin wettedness mapping to evaluate heat strain
European Journal of Applied Physiology, 2011Co-Authors: Kouhei Nakao, Yutaka TochiharaAbstract:The purpose of this study was to investigate the validity of a newly developed method for quantifying perceived skin wettedness ( W _p) as an index to evaluate heat strain. Eight male subjects underwent 12 experimental conditions: activities (rest and exercise) × clothing (Control, Tyvek and Vinyl condition) × air temperatures (25 and 32°C). To quantify the W _p, a full body map with 21 demarcated regions was presented to the subject. The results showed that (1) at rest in 25°C, W _p finally reached 4.4, 8.3 and 51.6% of the whole body surface area for Control, Tyvek, and Vinyl conditions, respectively, while W _p at rest in 32°C rose to 35.8, 61.4 and 89.8%; (2) W _p has a distinguishable power to detect the most wetted and the first wetted regions. The most wetted body regions were the upper back, followed by the chest, front neck, and forehead. The first perceived regions in the skin wetted map were the chest, forehead, and upper back; (3) W _p at rest showed a significant relationship with the calculated skin wettedness ( w ) ( r = 0.645, p
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Validity of perceived skin wettedness mapping to evaluate heat strain
European Journal of Applied Physiology, 2011Co-Authors: Joo-young Lee, Kouhei Nakao, Yutaka TochiharaAbstract:The purpose of this study was to investigate the validity of a newly developed method for quantifying perceived skin wettedness (Wp) as an index to evaluate heat strain. Eight male subjects underwent 12 experimental conditions: activities (rest and exercise) 9 clothing (Con- trol, Tyvek and Vinyl condition) 9 air temperatures (25 and 32?C). To quantify the Wp, a full body map with 21 demarcated regions was presented to the subject. The results showed that (1) at rest in 25?C, Wp finally reached 4.4, 8.3 and 51.6% of the whole body surface area for Control, Tyvek, and Vinyl conditions, respectively, while Wp at rest in 32?C rose to 35.8, 61.4 and 89.8%; (2) Wp has a distinguishable power to detect the most wetted and the first wetted regions. The most wetted body regions were the upper back, followed by the chest, front neck, and fore- head. The first perceived regions in the skin wetted map were the chest, forehead, and upper back; (3) Wp at rest showed a significant relationship with the calculated skin wettedness (w)(r = 0.645, p\0.01) and (4) Wp had a significant relationship with core temperature, skin tem- perature, heart rate, total sweat rate, thermal comfort, and humidity sensation (p\0.05), but these relationships were dependent on the level of activities and clothing insulation. Wp in hot environments was more valid as a heat strain index of workers wearing normal clothing in light works, rather than wearing impermeable protective clothing in strenuous works.
Joo-young Lee - One of the best experts on this subject based on the ideXlab platform.
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Validity of perceived skin wettedness mapping to evaluate heat strain
European Journal of Applied Physiology, 2011Co-Authors: Joo-young Lee, Kouhei Nakao, Yutaka TochiharaAbstract:The purpose of this study was to investigate the validity of a newly developed method for quantifying perceived skin wettedness (Wp) as an index to evaluate heat strain. Eight male subjects underwent 12 experimental conditions: activities (rest and exercise) 9 clothing (Con- trol, Tyvek and Vinyl condition) 9 air temperatures (25 and 32?C). To quantify the Wp, a full body map with 21 demarcated regions was presented to the subject. The results showed that (1) at rest in 25?C, Wp finally reached 4.4, 8.3 and 51.6% of the whole body surface area for Control, Tyvek, and Vinyl conditions, respectively, while Wp at rest in 32?C rose to 35.8, 61.4 and 89.8%; (2) Wp has a distinguishable power to detect the most wetted and the first wetted regions. The most wetted body regions were the upper back, followed by the chest, front neck, and fore- head. The first perceived regions in the skin wetted map were the chest, forehead, and upper back; (3) Wp at rest showed a significant relationship with the calculated skin wettedness (w)(r = 0.645, p\0.01) and (4) Wp had a significant relationship with core temperature, skin tem- perature, heart rate, total sweat rate, thermal comfort, and humidity sensation (p\0.05), but these relationships were dependent on the level of activities and clothing insulation. Wp in hot environments was more valid as a heat strain index of workers wearing normal clothing in light works, rather than wearing impermeable protective clothing in strenuous works.
Sandra L Rubio - One of the best experts on this subject based on the ideXlab platform.
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microbial barrier assessment of Tyvek stopper packaging for rubber closures
Pda Journal of Pharmaceutical Science and Technology, 1996Co-Authors: Jeanne E Moldenhauer, Sheila Bass, Michael J Kupinski, Mary L Walters, Sandra L RubioAbstract:Two types of Tyvek and high density polyethylene or polypropylene packaging used for sterilization of rubber closures were evaluated for Microbial Barrier properties. The packaging evaluated was “Ready to Sterilize” (1) stoppers and a second test package (Test 2) which was designated as appropriate for a clean room, filled with washed and siliconized stoppers and then heat sealed. Each type of packaging was subjected to three different sterilization temperatures (125°C, 128°C and 131°C) in a production sterilizer (15–18 psi). Following sterilization, a microbial barrier assessment was performed, using Bacillus subtilis niger (ATCC 9372), to determine whether the packaging could maintain a sterile barrier following sterilization. Results of the testing indicated that a microbial barrier was maintained for products in “Ready to Sterilize” packages at 125°C and 128°C. For products sterilized in the Test 2 container a microbial barrier could not be maintained at 128°C, and no further testing was performed. Following sterilization at 131°C physical defects were noted for the “Ready to Sterilize” bag and a microbial barrier could not be maintained.
J.p. Peigneux - One of the best experts on this subject based on the ideXlab platform.
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Optimization of a lead-tungstate crystal/photodetector system for high-energy physics
IEEE Transactions on Nuclear Science, 1995Co-Authors: G.yu. Drobyshev, A.a. Fyodorov, M.v. Korzhik, O.v. Misevich, V.a. Katchanov, J.p. PeigneuxAbstract:The characteristics of a crystal/photodetector system with long size lead-tungstate scintillator PbWO/sub 4/ (PWO) were studied. The influence of different measurement conditions on the light yield and light yield homogeneity was investigated for electromagnetic calorimeter modules with projective geometry. We have tested different kinds of reflective materials for the crystal covering such as MYLAR (mirror reflection) and MILLIPORE, TEFLON, Tyvek (diffuse reflection), using different shapes of crystals (as a parallelepiped, as a truncated pyramid, as double truncated pyramid), using light guides and/or reflecting covering at the bottom of crystal. In our investigation we have used a photomultiplier tube.
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Optimization of the lead-tungstate crystal/photodetector system for high-energy physics
Proceedings of 1994 IEEE Nuclear Science Symposium - NSS'94, 1994Co-Authors: G.yu. Drobyshev, A.a. Fyodorov, V.a. Katchanov, M.v. Krozhik, O.v. Miseveich, J.p. PeigneuxAbstract:The characteristics of the crystal/photodetector system with long size lead-tungstate scintillator PbWO/sub 4/ (PWO) were studied. The influence of different measurement conditions on the light yield and light yield homogeneity was investigated for the electromagnetic calorimeter modules with projective geometry. We have tested different kinds of reflective materials for crystal covering such as MYLAR (mirror reflection) and MILLIPORE, TEFLON, Tyvek (diffuse reflection), using different shapes of crystals (as a parallelepiped, as a truncated pyramid, as a double truncated pyramid), using light guides and/or reflecting covering at the bottom of the crystal. In our investigation we have used a photomultiplier tube.
