Kruaehong T.,Suratthani Rajabhat University
Advanced Materials Research | Year: 2014
The YBa2Cu3O7-d(Y123) compounds were synthesized by solid state reaction method. The home-made four-probes apparatus was used for the resistivity measurement. The highest Tc is 91. 95 K in sample C and sample A has lowest Tc onset at 89. 85 K. The crystal structure properties and oxygen content were characterized by powder X-ray diffraction using CuKα radiation (λ=1. 5406 Å). The Pmmm and Pnma space group corresponding on the superconducting phase and the non-superconducting phase. The atomic position of samples was consisted of various element atoms. The longer time of oxygen-doping, the increase the critical temperature, superconducting phase and c lattice parameters. © (2014) Trans Tech Publications, Switzerland.
Kruaehong T.,Suratthani Rajabhat University
Journal of the Australian Ceramic Society | Year: 2015
The Y123, Y358 and Y3-811 bulk superconductors have been synthesized by solid state reaction using fluorine doping. The composite superconductors were characterized by a homemade standard d.c. four-probe method. The crystal structure was investigated by powder X-ray diffraction analysis. The X-ray diffraction spectrum was analyzed using a FULLPROF software program. The results revealed that Tconset and Tcoffset decrease when the fluorine doping is increased. These materials had closely the same value in a,b direction. The lower superconducting phase, critical temperature, value of c direction and anisotropic were found at fluorine doping. © 2015, The Australian Ceramic Society.
Angkananon K.,Suratthani Rajabhat University |
Wald M.,University of Southampton
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016
This paper focuses on extending the Technology Enhanced Accessible Interaction Framework Method for visual impairment based on interviews with people with visual impairment to help developers develop accessible technology solutions to help people with visual impairment to interact with people, technologies and objects. © Springer International Publishing Switzerland 2016.
Thongkanluang T.,Suratthani Rajabhat University |
Kittiauchawal T.,Thepsatri Rajabhat University |
Limsuwan P.,King Mongkuts University of Technology Thonburi
Ceramics International | Year: 2011
Green pigments with high near infrared reflectance based on a Cr 2O3-TiO2-Al2O3-V 2O5 composition have been synthesized. Cr 2O3 was used as the host component and mixtures of TiO2, Al2O3 and V2O5 were used as the guest components. TiO2, Al2O3, and V2O5 were mixed into 39 different compositions. The spectral reflectance and the distribution of pigment powder were determined using a spectrophotometer and a scanning electron microscope, respectively. It was found that a pigment powder sample S9 with a Cr2O 3-TiO2-Al2O3-V2O 5 composition of 80, 4, 14 and 2 wt%, respectively, gives a maximum near infrared solar reflectance of 82.8% compared with 49.0% for pure Cr 2O3. The dispersion of pigment powders in a ceramic glaze was also studied. The results show that the pigment powder sample S9 is suitable for use as a coating material for ceramic-based roofs.
Chanthawong A.,Asian Institute of Technology |
Chanthawong A.,Suratthani Rajabhat University |
Dhakal S.,Asian Institute of Technology
Energy Policy | Year: 2016
Thailand is Southeast Asia's largest promoter of biofuels. Although, Thailand promotes the use of biofuels, it has yet to achieve its policy targets. This paper focuses on the first generation biofuel development in Thailand and examines the perceptions of seven stakeholder groups to guide further policy development. These stakeholders were feedstock producers, biofuel producers, government agencies, car manufacturers, oil companies, non-profit organizations and end users. It combines a Strengths, Weakness, Opportunities and Threats (SWOT) framework with an Analytical Hierarchy Process (AHP) framework and a TOWS Matrix for analysis of stakeholder's perceptions to propose priorities for policy development. Five policies were of high priority for development of biofuel. These are: (1) promoting biofuel production and use in long term through government policies, (2) revising government regulations to allow sale of biofuel products to other domestic industries while keeping retail prices of blended biofuels below those of regular ethanol and biodiesel, (3) improving farm management and promoting contract farming, (4) expanding cultivation area and yield without affecting food production and environmental sustainability, and (5) balancing biofuel feedstock use between the food and energy industries. © 2016 Elsevier Ltd.