Research Articles – Page 19 – Asia-Pacific Journal of Science and Technology (APST)

Vol. 23 No. 4 (2018): October-December

Estimating parameters of a stochastic volatility model using the expectation-maximization algorithm coupled with a Gaussian particle filter

Tanit Malakorn Department of Electrical and Computer Engineering, Naresuan University, Phitsanulok, Thailand Thanapat Iamtan National Science and Technology Development Agency, Pathum Thani, Thailand DOI: https://doi.org/10.14456/apst.2018.17 Keywords: Maximum likelihood Parameter estimation Bootstrap filter Daily exchange rates Abstract In this paper, the expectation-maximization algorithm coupled with a Gaussian particle filter for maximum likelihood parameter estimation of a […]

Vol. 23 No. 4 (2018): October-December

Monitoring of pesticide residues in domestic vegetables in Thailand during 2015

Jitpaka Suntudrob Bureau of Quality and Safety of Food, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand Wischada Jongmevasna Bureau of Quality and Safety of Food, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand Thongsuk Payanan Bureau of Quality and Safety of Food, Department of Medical Sciences, Ministry of Public Health, […]

Vol. 23 No. 4 (2018): October-December

Effect of density and surface finishing on sound absorption of oil palm frond

Nanthicha Bubparenu Department of Environmental Health Sciences, Faculty of Public Health, Mahidol University, Bangkok, Thailand Nikhom Laemsak Department of Environmental Health Sciences, Faculty of Public Health, Mahidol University, Bangkok, Thailand & Department of Forest Products, Faculty of Forestry, Kasetsart University, Bangkok, Thailand Ratchapak Chitaree Department of Physics, Faculty of Science, Mahidol University, Bangkok, Thailand Tanasri […]

Vol. 23 No. 4 (2018): October-December

SARIMA intervention based forecast model for visitor arrivals to Chiang Mai, Thailand

Rati Wongsathan Department of Electrical and Computer Engineering, Faculty of Engineering and Technology, North-Chiang Mai University, Hangdong, Chiang Mai, Thailand DOI: https://doi.org/10.14456/apst.2018.19 Keywords: SARIMA SARIMA with Intervention Visitor forecast Abstract The purpose of this research is to implement the forecast model for domestic and international visitor arrivals to Chiang Mai, Thailand using seasonal autoregressive integrated […]

Vol. 23 No. 3 (2018): JULY-SEP

What are predictors for a continuous positive airway pressure machine purchasing in obstructive sleep apnea patients?

Bundit Sawunyavisuth Department of Marketing, Faculty of Business Administration and Accountancy, Khon Kaen University, Khon Kaen, Thailand DOI: https://doi.org/10.14456/apst.2018.10 Keywords: insomnia marketing factors predictors Abstract Obstructive sleep apnea (OSA) is a disease which causes or relates to several health and societal conditions. Even though continuous positive airway pressure (CPAP) machine has several benefits for OSA treatment, […]

Vol. 27 No. 01 (2022): JAN-FEB

Properties and microstructure of composite cement paste with diatomaceous earth powder (DEP) from Aceh Besar district – Indonesia

Muttaqin Hasan Department of Civil Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia Taufiq Saidi Department of Civil Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia H Husaini Department of Mechanical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia DOI: https://doi.org/10.14456/apst.2022.3 Keywords: Diatomaceous earth Composite cement Compressive strength Microstructure Water demand Abstract The research was conducted to determine […]

Vol. 23 No. 3 (2018): JULY-SEP

Oxidative stability and discoloration of frozen tilapia fillet dipped in alkali-aided protein hydrolysates from tilapia byproducts

Kwanruedee Wachirattanapongmetee Department of Food Technology, Faculty of Technology, Khon Kaen University, Khon Kaen , Thailand. Somporn Katekaew Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand. Supawan Thawornchinsombut Department of Food Technology, Faculty of Technology, Khon Kaen University, Khon Kaen, Thailand DOI: https://doi.org/10.14456/apst.2018.6 Keywords: alkali-treated protein hydrolysate tilapia byproducts frozen tilapia […]

Vol. 27 No. 01 (2022): JAN-FEB

Antibacterial activity of selected medicinal plants from Malaysia

Sze M. Chan Faculty of Science, Universiti Tunku Abdul Rahman, Perak, Malaysia Voon Y. Fong Faculty of Science, Universiti Tunku Abdul Rahman, Perak, Malaysia Seng Y. Koo Faculty of Science, Universiti Tunku Abdul Rahman, Perak, Malaysia Tansra K.R. Singh Faculty of Science, Universiti Tunku Abdul Rahman, Perak, Malaysia Esther L.H. Tang Faculty of Science, Universiti […]

Vol. 23 No. 3 (2018): JULY-SEP

Multi-mutation scheme adaptive differential evolution for solving truss sizing optimization

Natee Panagant Sustainable and Infrastructure Research and Development Center, Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand. Sujin Bureerat Sustainable and Infrastructure Research and Development Center, Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand. DOI: https://doi.org/10.14456/apst.2018.5 Keywords: Meta-heuristics Adaptive algorithms Truss sizing optimization Differential evolution […]

Vol. 27 No. 01 (2022): JAN-FEB

Acute effects of whole body vibration and weighted vest on muscle strength and balance in elderly

Lertwanlop Srisaphonphusitti Exercise and Sports Science Program, Graduate School, Khon Kaen University, Khon Kaen, Thailand Nuttaset N. Manimmanakorn Department of Rehabilitation Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand Apiwan Manimmanakorn Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand Nichanun Panyaek Department of Rehabilitation Medicine, Faculty of Medicine, Khon […]