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    An Analysis of the Causal Relationships in Sustainable Consumption Behaviour (SCB) of Thai Student Science Teachers
    (2021-01-01)
    Pimdee, Paitoon
    Having its originations in the 1987 UN Brundtland Report and the 1994 Oslo Symposium for sustainable consumption and production (SCP), education for sustainable development (ESD) has taken on global importance. As such, the study’s author sought to examine the causal relationships on sustainable consumption behaviour (SCB) of Thai student science teachers, as these are the leaders of tomorrow. The sample of 200 men and 200 women was obtained by use of multistage random sampling from ten state universities located across 5 Thai regions. The research tool was a 5-level response questionnaire consisting of 130 total items examining 18 observed variables, of which 97 items were positive in nature, while the remaining 33 items were negative in nature. The IOC was used to assess the questionnaire’s development process by the three teacher training experts. Subsequent item reliability testing of the pilot test group of 62 individuals used Cronbach’s Alpha (α) to judge reliability. Further data analysis made use of LISREL 9.1 software on the interrelationships of the latent variables psychological state (PS), environmental education (EE), psychological traits (PT), situation (SIT), as well as their effect on SCB. Results revealed that all the model’s causal variables had a positive effect on SCB, which can be explained by the combined influence of the factors (R2) being 92%. Furthermore, four factors were determined to influence SCB. Ranked in importance, these included SIT, EE, PS, and PT.
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    Reduced graphene oxide thin film prepared by electrostatic spray deposition technique
    (2019-03-15)
    Songkeaw, Potiyan
    ;
    Onlaor, Korakot
    ;
    Thiwawong, Thutiyaporn
    ;
    Tunhoo, Benchapol
    Reduced graphene oxide (rGO) thin films were prepared by one-step electrostatic spray deposition (ESD) technique with a precursor solution of graphene oxide in mixed alcohol solvent. The deposited rGO films showed decreasing thicknesses ranging from approximately 340 nm–120 nm as substrate temperature increased from 150 °C to 275 °C. Raman spectroscopy indicated lowest intensity ratio of D to G band (I <inf>D</inf> /I <inf>G</inf> ) of the rGO films at substrate temperature of 275 °C. Highest carbon per oxygen (C/O) ratio was also obtained at substrate temperature of 275 °C. The ESD technique was used for film deposition on an area of 5 × 5 cm <sup>2</sup> , while an acetone gas sensor based on single layer rGO film was fabricated by one-step ESD technique. Results indicated the possibility of controlling thickness components in the rGO film, and the capability of large-area production by this scalable ESD method.
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    Reliability modeling for integrated BPCS and ESD system case study: A two-phase gas-liquid separator process
    (2018-06-08)
    Thepmanee, Teerawat
    This paper addresses the analytical models and statistical methods used to analyze reliability systems that form the basis for evaluation and prediction of the stochastic failure and nonrepairable behavior of complex process control systems, assembled using a variety of components. The reliability model design of a two-phase gas-liquid separator process has been conducted in this study. The quantitative fault tree analysis approach which has been proved to be acceptable and widely applied in many applications of modeling and methods supporting the system integrator and safety engineer not only to identify how subsystems and components could fail and what are the corresponding effects on the whole system, but also to quantify the reliability parameters for complex systems. The results obtained from our case study can be useful as the tools for justifying the design and implement of BPCS&ESD systems.
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    Electrical bistable properties of ZnO nanoparticles thin film prepared by electrostatic spray deposition technique
    (2015-07-01)
    Chaithanatkun, Natpasit
    ;
    Chantarawong, Direklit
    ;
    Songkeaw, Potiyan
    ;
    Onlaor, Korakot
    ;
    Thiwawong, Thutiyaporn
    Thin films of zinc oxide nanoparticles (ZnO NPs) for bistable device was prepared by electrostatic spray deposition technique based on an indium-tin oxide/ZnO NPs/aluminum (ITO/ZnO NPs /Al) structure. The characterizations of ZnO NPs films were performed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM). The influence of the deposition time on properties of films was also investigated. Moreover, the effect of deposition time on the bistable properties can be performed by current-voltage (I-V) measurements. The conduction mechanism of the bistable device was analyzed by theoretical model.
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    Advanced material evaluations and considerations for electrostatic control in electronic device manufacturing
    (2013-02-01)
    Chakkaew, Anusorn
    ;
    Suriya-Amaranont, Chaba
    ;
    Titiroongruang, Wisut
    Electrostatic potential and electrostatic discharge (ESD) has been a manufacturing issue for years, not only limited to semiconductor-based electronic devices, hard dish drive assemblies, but also to adjacent electronic device manufacturing such as microelectromechanical systems and nanoelectromechanical systems devices. This research presents a complete material testing and evaluations for electrostatic control in electronic device manufacturing. There are materials and system evaluations and considerations of electrostatic generation on personnel, personnel grounding through wrist strap and grounding wire, personnel grounding through constant wrist strap monitor, and with static control footwear and floorings. This research also presents machine grounding measurement and consideration with ground impedance, when ground noise is present, area where most regular ohm meter fails. Discharge simulation from device handling materials, and electrostatic discharge characterization of static control surfaces for small and light devices. © 2013 American Scientific Publishers All rights reserved.
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    Electrostatic control and new device handling consideration for MEMS manufacturing process
    (2012-01-01)
    Chakkaew, Anusorn
    ;
    Titiroongruang, Wisut
    Electrostatic potential and electrostatic discharge (ESD) has been a factory issue for years, not only limited to semiconductor-based electronic devices, but there are evidences that new devices from emerging technologies become sensitive which are MEMS and NEMS. This paper describes new electrostatic control and device handling solutions for critical electrostatic control environment for MEMS manufacturing processes. There are experiments of personnel grounding devices, device handling materials, and evaluation of static control surfaces.
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    Electrostatic discharge simulation and experimental analysis of electrostatic control in electronic device manufacturing
    (2012-01-01)
    Chakkaew, Anusorn
    ;
    Titiroongruang, Wisut
    Electrostatic potential and electrostatic discharge (ESD) have been a factory issue for years, not only limited to semiconductor-based electronic devices, hard dish drive assemblies, and microelectromechanical systems and nanoelectromechanical systems devices, which are extremely sensitive to electrostatic field and the ESD. This paper presents ESD simulation and experimental analysis of electrostatic control in electronic device manufacturing. There are experiments of electrostatic on personnel, personnel grounding through wrist strap, through constant wrist strap monitor, and with static control footwear and floorings, machine grounding consideration, device handling materials, and ESD characterisation of static control surfaces for small and light devices. Copyright © 2012 Inderscience Enterprises Ltd.