The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Hidehiro Toyoda - One of the best experts on this subject based on the ideXlab platform.
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Weatherability of coated fabrics as roofing material in Tropical Environment
Building and Environment, 2004Co-Authors: Hanim Abdul Razak, C. S. Chua, Hidehiro ToyodaAbstract:The weatherability of PTFE- and PVC-coated fabrics under Tropical climate was evaluated based on outdoor exposure test for a period of 2 years. This study is confined to the examination of the surface characteristics of 10 different types of fabric which include dirt repellency, discolouration and coating condition. The results indicate that the dirt repellency of PTFE-coated fabrics is generally more superior. However, the surface treatment for some of the PVC-coated fabrics, do provide excellent dirt repellency as well. Morphological examinations using the scanning electron microscope revealed that cracking and peeling of the coating were more evident on the PVC-coated as compared to the PTFE-coated fabrics. The hot and humid conditions prevalent in a Tropical Environment were very conducive for the growth of fungi, which adhered on the surface of some of the PVC-coated fabrics. Generally the degree of surface degradation on all the fabrics was more severe due to the much harsher Tropical climate in comparison with other exposure tests conducted in the past. © 2003 Elsevier Ltd. All rights reserved.
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Weatherability of coated fabrics as roofing material in Tropical Environment
Building and Environment, 2004Co-Authors: Hanim Abdul Razak, C. S. Chua, Hidehiro ToyodaAbstract:The weatherability of PTFE- and PVC-coated fabrics under Tropical climate was evaluated based on outdoor exposure test for a period of 2 years. This study is confined to the examination of the surface characteristics of 10 different types of fabric which include dirt repellency, discolouration and coating condition. The results indicate that the dirt repellency of PTFE-coated fabrics is generally more superior. However, the surface treatment for some of the PVC-coated fabrics, do provide excellent dirt repellency as well. Morphological examinations using the scanning electron microscope revealed that cracking and peeling of the coating were more evident on the PVC-coated as compared to the PTFE-coated fabrics. The hot and humid conditions prevalent in a Tropical Environment were very conducive for the growth of fungi, which adhered on the surface of some of the PVC-coated fabrics. Generally the degree of surface degradation on all the fabrics was more severe due to the much harsher Tropical climate in comparison with other exposure tests conducted in the past.
Hanim Abdul Razak - One of the best experts on this subject based on the ideXlab platform.
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Weatherability of coated fabrics as roofing material in Tropical Environment
Building and Environment, 2004Co-Authors: Hanim Abdul Razak, C. S. Chua, Hidehiro ToyodaAbstract:The weatherability of PTFE- and PVC-coated fabrics under Tropical climate was evaluated based on outdoor exposure test for a period of 2 years. This study is confined to the examination of the surface characteristics of 10 different types of fabric which include dirt repellency, discolouration and coating condition. The results indicate that the dirt repellency of PTFE-coated fabrics is generally more superior. However, the surface treatment for some of the PVC-coated fabrics, do provide excellent dirt repellency as well. Morphological examinations using the scanning electron microscope revealed that cracking and peeling of the coating were more evident on the PVC-coated as compared to the PTFE-coated fabrics. The hot and humid conditions prevalent in a Tropical Environment were very conducive for the growth of fungi, which adhered on the surface of some of the PVC-coated fabrics. Generally the degree of surface degradation on all the fabrics was more severe due to the much harsher Tropical climate in comparison with other exposure tests conducted in the past. © 2003 Elsevier Ltd. All rights reserved.
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Weatherability of coated fabrics as roofing material in Tropical Environment
Building and Environment, 2004Co-Authors: Hanim Abdul Razak, C. S. Chua, Hidehiro ToyodaAbstract:The weatherability of PTFE- and PVC-coated fabrics under Tropical climate was evaluated based on outdoor exposure test for a period of 2 years. This study is confined to the examination of the surface characteristics of 10 different types of fabric which include dirt repellency, discolouration and coating condition. The results indicate that the dirt repellency of PTFE-coated fabrics is generally more superior. However, the surface treatment for some of the PVC-coated fabrics, do provide excellent dirt repellency as well. Morphological examinations using the scanning electron microscope revealed that cracking and peeling of the coating were more evident on the PVC-coated as compared to the PTFE-coated fabrics. The hot and humid conditions prevalent in a Tropical Environment were very conducive for the growth of fungi, which adhered on the surface of some of the PVC-coated fabrics. Generally the degree of surface degradation on all the fabrics was more severe due to the much harsher Tropical climate in comparison with other exposure tests conducted in the past.
C. S. Chua - One of the best experts on this subject based on the ideXlab platform.
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Weatherability of coated fabrics as roofing material in Tropical Environment
Building and Environment, 2004Co-Authors: Hanim Abdul Razak, C. S. Chua, Hidehiro ToyodaAbstract:The weatherability of PTFE- and PVC-coated fabrics under Tropical climate was evaluated based on outdoor exposure test for a period of 2 years. This study is confined to the examination of the surface characteristics of 10 different types of fabric which include dirt repellency, discolouration and coating condition. The results indicate that the dirt repellency of PTFE-coated fabrics is generally more superior. However, the surface treatment for some of the PVC-coated fabrics, do provide excellent dirt repellency as well. Morphological examinations using the scanning electron microscope revealed that cracking and peeling of the coating were more evident on the PVC-coated as compared to the PTFE-coated fabrics. The hot and humid conditions prevalent in a Tropical Environment were very conducive for the growth of fungi, which adhered on the surface of some of the PVC-coated fabrics. Generally the degree of surface degradation on all the fabrics was more severe due to the much harsher Tropical climate in comparison with other exposure tests conducted in the past. © 2003 Elsevier Ltd. All rights reserved.
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Weatherability of coated fabrics as roofing material in Tropical Environment
Building and Environment, 2004Co-Authors: Hanim Abdul Razak, C. S. Chua, Hidehiro ToyodaAbstract:The weatherability of PTFE- and PVC-coated fabrics under Tropical climate was evaluated based on outdoor exposure test for a period of 2 years. This study is confined to the examination of the surface characteristics of 10 different types of fabric which include dirt repellency, discolouration and coating condition. The results indicate that the dirt repellency of PTFE-coated fabrics is generally more superior. However, the surface treatment for some of the PVC-coated fabrics, do provide excellent dirt repellency as well. Morphological examinations using the scanning electron microscope revealed that cracking and peeling of the coating were more evident on the PVC-coated as compared to the PTFE-coated fabrics. The hot and humid conditions prevalent in a Tropical Environment were very conducive for the growth of fungi, which adhered on the surface of some of the PVC-coated fabrics. Generally the degree of surface degradation on all the fabrics was more severe due to the much harsher Tropical climate in comparison with other exposure tests conducted in the past.
A Thongsathitya - One of the best experts on this subject based on the ideXlab platform.
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development of a method for generating operational solar radiation maps from satellite data for a Tropical Environment
Solar Energy, 2005Co-Authors: S Janjai, J Laksanaboonsong, M Nunez, A ThongsathityaAbstract:Despite a considerable number of publications which use satellite data to map solar radiation, relatively few studies have been undertaken in a Tropical Environment. In this study, we have developed a method to produce operational solar radiation maps from satellite data for this Environment. The method is based on a physical model which relates the satellite-derived earth–atmospheric reflectivity from visible channel of GMS-4 and GMS-5 to the transmissivity of the atmosphere. Cloud reflectivity was determined from satellite data, while radiation absorbed by water vapour, ozone and aerosols and radiation scattered by aerosols were determined from ground-based meteorological data. Techniques for determining the radiation depleted by these atmospheric constituents over a whole country were also presented. Satellite data of a six-year period (1993–1998) with approximately ten thousand satellite images were used to construct the maps. When tested against an independent data set, monthly average of daily global irradiation calculated from this method agree with that obtained from the measurements with the relative root mean square difference of 6.8% with respect to the mean values. Solar radiation is presented as twelve maps showing the monthly average of global irradiation and one map showing the yearly average of global irradiation. Radiation patterns from the maps show a strong influence of the Tropical monsoons.
S Fukai - One of the best experts on this subject based on the ideXlab platform.
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improving efficiency of water use for irrigated rice in a semi arid Tropical Environment
Field Crops Research, 1997Co-Authors: Andrew Borrell, Alan Garside, S FukaiAbstract:Irrigation water accounts for almost 40% of total variable production costs for rice (Oryza sativa L.) cropping in the Burdekin River Irrigation Area, northern Australia. Increasing the efficiency of water use would improve the economic viability of growers and long-term Environmental benefits would also be likely due to lower water tables and decreased salinisation in irrigation areas. The aim of these studies was to maximize grain yield by optimizing its functional components: water use, efficiency of water use for dry matter production (WUEdm) and harvest index (HI). The responses of dry matter and yield in rice (cv. Lemont) to five methods of irrigation were studied in a wet and dry season in the region. Applying a permanent flood at sowing, the 3-leaf stage (traditional) and prior to panicle initiation were compared with two unflooded methods: saturated soil culture (SSC) and intermittent irrigation at weekly intervals. Saturated soil culture consisted of growing rice on raised beds of height 0.2 m and width 1.2 m, with water maintained in the furrows (0.3 m wide) some 0.1 m below the bed surface. The results of these studies show that it is not necessary to flood rice to obtain high grain yield and quality. The trend was for yield to increase with water supply, but there was no significant difference in yield and quality between SSC and traditional flooded production, although SSC used about 32% less water in both seasons. Therefore the efficiency of water use for grain production (WUEg, g m−2 mm−1) was higher in SSC than in traditional flooded production in the wet season and a similar trend existed in the dry season. There were no differences between SSC and the traditional method of irrigation in any of the grain quality components measured, indicating that this water saving method did not lower grain quality. Weed growth was generally higher in unflooded treatments, although weed populations in SSC and traditionally flooded rice were equivalent in the dry season, suggesting that weeds can be controlled in SSC. Saturated soil culture provides a viable alternative to flooded rice production for growers in semi-arid Tropical Environments. Substantial reductions in variable costs of production are attainable by reducing water use without reducing yield and quality.
