Articles from Academic Databases : SCOPUS

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A Bibliometric Analysis of Keywords of HyFlex Learning for the English Language Learning Skills of Teacher Students
(School of Liberal Arts, King Mongkut's University of Technology Thonburi, 2024) Thip Khumyoo; Niroumon Suwannasri; Akkrawat Wongthitikun; Jira Jitsupa; Jittree Jampeetong; J. Jitsupa; Faculty of Education, Suan Dusit University, Thailand; email: jira_jit@dusit.ac.th
Listening, speaking, reading, and writing are important skills in English language learning. However, some students are not successful in learning English due to several factors. The model for improving the English learning skills of students is essential. However, except for the HyFlex learning model, no suitable model for learners has been found following the new normal. This research, therefore, identify the bibliographic keywords of HyFlex learning for the English learning skills of teacher students. According to a total of 465 documents published in the Scopus database, 40 articles met the research inclusion criteria and keywords related to HyFlex learning could be used to guide the development of the model of English language learning skills of students. Findings, the keywords of HyFlex learning for the English learning skills of teacher students 42 keywords related to Hyflex learning that clustered into seven categories: Higher education, Learning environment, Teaching and learning model, Digital technology for learning, Teacher, Student, and English language. © 2024, School of Liberal Arts, King Mongkut's University of Technology Thonburi. All rights reserved.
A combined effect of plasmon energy transfer and recombination barrier in a novel TiO2/MgO/Ag working electrode for dye-sensitized solar cells
(Hindawi Limited, 2015) Chanu Photiphitak; Pattana Rakkwamsuk; Pennapa Muthitamongkol; Chanchana Thanachayanont; C. Thanachayanont; National Metal and Material Technology Center, 114, Thailand Science Park, Klong Luang, Pathumthani, Phaholyothin Road, Klong 1, 12120, Thailand; email: chanchm@mtec.or.th
Novel TiO2/MgO/Ag composite electrodes were applied as working electrodes of dye-sensitized solar cells (DSSCs). The TiO2/MgO/Ag composite films were prepared by dip coating method for MgO thin films and photoreduction method for Ag nanoparticles. The MgO film thicknesses and the Ag nanoparticle sizes were in ranges of 0.08-0.46 nm and 4.4-38.6 nm, respectively. The TiO2/MgO/Ag composite films were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The TiO2/MgO/Ag composite electrodes were sensitized by immersing in a 0.3 mM of N719 dye solution and fabricated for conventional DSSCs. J-V characteristics of the TiO2/MgO/Ag DSSCs showed that the MgO film thickness of 0.1 nm and the Ag nanoparticle size of 4.4 nm resulted in maximum short circuit current density and efficiency of 8.6 mA/cm2 and 5.2%, respectively. Electrochemical Impedance Spectroscopy showed that such values of short circuit current density and efficiency were optimal values obtained from plasmon energy transfer by 4.4 nm Ag nanoparticles and recombination barrier by the ultrathin MgO film. � 2015 Chanu Photiphitak et al.
A Comparative analysis of internet banking security in Thailand: A customer perspective
(Elsevier Ltd, 2012) P. Subsorn; S. Limwiriyakul; S. Limwiriyakul; SECAU Security Research Centre, Edith Cowan University, Joondalup, WA 6027, Australia; email: slimwiri@our.ecu.edu.au
Internet technology has influenced everyday life during the past few decades because of its capability to assist and enhance operational and managerial performance in both non-business and business industries. Furthermore, security issues have become more common nowadays in internet technology particularly on internet banking systems due to the harmful impact on confidentiality, integrity and privacy of the bank and its customers. In the previous research, we investigated the internet banking security system of 16 selected Australian banks. The findings from that research revealed that there were deficiencies in internet banking security in all 16 of the selected Australian banks which were likely to affect the confidentiality of the existing and potential customers of the banks. The aim of this paper was to further the scope of the research by investigating internet banking security in another country. It examined 12 Thai commercial banks and compared the results/findings obtained from the previous research paper to generate a feasible guideline for Thai commercial banks. The investigation revealed that there was a distinct lack of internet banking security information provided on all the selected Thai banks' websites as compared to the selected Australian banks which provided better internet banking security information. © 2010 Published by Elsevier Ltd.
A comparison of gravitational acceleration measurement methods for undergraduate experiment
(Institute of Physics Publishing, 2018) N. Suwanpayak; S. Sutthiyan; K. Kulsirirat; P. Srisongkram; C. Teeka; P. Buranasiri; N. Suwanpayak; Department of General Science, King Mongkut's Institute of Technology Ladkrabang, Prince of Chumphon Campus, Chumphon, Thailand; email: ksnathap@gmail.com
This research aimed to determine the acceleration due to gravity (g), by using the methods of free fall, simple pendulum, physical pendulum and an Atwood's machine in the undergraduate laboratory. The experiments were designed for students to explore, analyze the data and interpreting the results by using the principle of a Physics laboratory. The mean experimental values of acceleration due to the gravity of free fall, simple pendulum, physical pendulum and the Atwood's machine were 9.64 m/s 2 , 9.67 m/s 2 , 10.88 m/s 2 and 10.47 m/s 2 , respectively. � Published under licence by IOP Publishing Ltd.
A comprehensive analysis of hermiteÐhadamard type inequalities via generalized preinvex functions
(MDPI, 2021) Muhammad Tariq; Hijaz Ahmad; HŸseyin Budak; Soubhagya Kumar Sahoo; Thanin Sitthiwirattham; Jiraporn Reunsumrit; T. Sitthiwirattham; Department of Mathematics, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: thanin_sit@dusit.ac.th
The principal objective of this article is to introduce the idea of a new class of n-polynomial convex functions which we call n-polynomial s-type m-preinvex function. We establish a new variant of the well-known HermiteÐHadamard inequality in the mode of the newly introduced concept. To add more insight into the newly introduced concept, we have discussed some algebraic properties and examples as well. Besides, we discuss a few new exceptional cases for the derived results, which make us realize that the results of this paper are the speculations and expansions of some recently known outcomes. The immeasurable concepts and chasmic tools of this paper may invigorate and revitalize additional research in this mesmerizing and absorbing field. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
A correlation analysis between sentimental comment and numerical response in students' feedback
(Asian Research Publishing Network, 2015) Phuripoj Kaewyong; Anupong Sukprasert; Naomie Salim; Fatin Aliah Phang; P. Kaewyong; Information Technology Department, Suan Dusit University, Thailand; email: phuripoj@yahoo.com
This paper aims to study a qualitative measuring of students' comments using sentiment analysis to teacher evaluation and investigate its qualitative analysis. A small dataset of students' feedbacks was collected from the public website and was utilized in the experimental. We performed the lexicon based sentiment analysis to identify sentiment word and determine overall sentiment polarity of students' comment into positive and negative classes based on Opinion Lexicon automatically. A comparison between overall sentiment scores and numerical response scores of teacher evaluation aspects were evaluated and plotted into graphs in order to compare the relationship between each pair of two variables. Especially, we applied the statistical techniques using Pearson's correlation and Spearman's rank to confirm these visual correlation results. The experimental results suggested that there is a significant correlation between overall sentiment scores from its qualitative analysis and numerical response scores of teacher evaluation aspects. Based on this, it might be possible to convert from qualitative to quantitative type of teacher evaluation by performing lexicon based sentiment analysis.
A coupled system of fractional difference equations with nonlocal fractional sum boundary conditions on the discrete half-line
(MDPI AG, 2019) Jarunee Soontharanon; Saowaluck Chasreechai; Thanin Sitthiwirattham; S. Chasreechai; Department of Mathematics, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand; email: saowaluck.c@sci.kmutnb.ac.th
In this article, we propose a coupled system of fractional difference equations with nonlocal fractional sum boundary conditions on the discrete half-line and study its existence result by using Schauder's fixed point theorem. An example is provided to illustrate the results. � 2019 by the authors.
A Cross Sectional Study of the Ten Longest Ultra-Long-Range Air Routes
(Sciendo, 2019) Glenn Baxter; Panarat Srisaeng; Graham Wild
In recent times, several airlines have commenced the operation of ultra-long-range (ULR) services. Using a mixed methods research approach, this paper examines the aircraft deployment, the target passenger market segments, the aircraft cabin configurations, the flight stage lengths and the available seat kilometres (ASKs) produced on the world's ten longest air routes. The study found that some airlines are operating ultra-long-range services on a hub-to-hub basis, whilst other airlines are operating these services to open new spoke city markets. The case airlines are targeting the premium and leisure travel market segments. The Boeing 787-9 is the most popular aircraft type for these services followed by the Airbus A380-800 and the Boeing B777-200LR aircraft. Qatar Airways Doha to Auckland service has the longest flight stage length (14,535 kilometres). The other 9 air routes all exceed 13,400 kilometres in length. The greatest number of annual ASKs are produced on the Emirates Dubai to Auckland services (5.09 billion ASKs) and the smallest number of annual ASKs are on the Qantas Airways Perth to London services (2.49 billion ASKs). � 2019 Transport and Telecommunication Institute, published by Sciendo.
A deep contrastive learning-based image retrieval system for automatic detection of infectious cattle diseases
(Springer Nature, 2025) Veerayuth Kittichai; Morakot Kaewthamasorn; Apinya Arnuphaprasert; Rangsan Jomtarak; Kaung Myat Naing; Teerawat Tongloy; Santhad Chuwongin; Siridech Boonsang; S. Boonsang; Department of Electrical Engineering, School of Engineering, King MongkutÕs Institute of Technology Ladkrabang, Bangkok, Thailand; email: siridech.bo@kmitl.ac.th
Anaplasmosis, which is caused by Anaplasma spp. and transmitted by tick bites, is one of the most serious livestock animal diseases worldwide, causing significant economic losses as well as public health issues. Anaplasma marginale, a gram-negative intracellular obligate bacterium, can cause disease in cattle and other ruminants. Because of the insufficient quality of the slides, a microscopic diagnostic procedure is time-consuming and challenging to diagnose. Intra- and inter-rater variation is frequently imposed on by technicians who are underqualified and unexperienced. Alternatively, algorithms could support local employees in tracking disease transmission and quick action, especially in Thailand where this cattle disease is common. As a result, the study intends to create an automated tool based on a deep neural network linked with an image-retrieval procedure for recognizing infections in microscopic pictures. The Resnext-50 model, which serves as the embedding spaceÕs backbone and is optimized by Triplet-Margin loss, outperforms, with averaged accuracy and specificity ratings of 91.30 percent and 92.83 percent, respectively. The modelÕs performance was also improved by a fine-tuned procedure between k-nearest neighbor and its normalized distance of each data point, including precision of 0.833 ± 0.134, specificity of 0.930 ± 0.054, recall of 0.838 ± 0.118, and accuracy of 0.915 ± 0.025, respectively. Five-fold cross-validation confirms that the trained model using the optimal k-nearest neighbor (kNN) for the image-based retrieval system, involving 12 images, prevents overfitting via dataset variations indicating areas under the receiver operating curve rankings ranging from 0.917 to 0.922. The image retrieval technique demonstrated in this research is a prototype for a variety of applications. The findings may aid in the early diagnosis of anaplasmosis infections in remote areas without access to veterinary care or costly molecular diagnostic tools. © The Author(s) 2024.
A facile fynthesis of ZnS nanostructures via liquid-solid reactions
(Trans Tech Publications Ltd, 2014) Weerachon Phoohinkong; Thitinat Sukonket; Udomsak Kitthawee
Zinc sulfide (ZnS) nanostructures are important materials for many technologies such as sensors, infrared windows, transistors, LED displays, and solar cells. However, many methods of synthesizing ZnS nanostructures are complex and require expensive equipment. In this study, a liquid-solid chemical reaction without surfactant was used to synthesize ZnS at room temperature. In addition, commercial grade zinc oxide (ZnO) particles were used as a precursor. The effect of the addition of acids and inorganic salts were investigated. The products were characterized by field emission scanning electron microscopy (FESEM) coupled with energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The results show that the nanoparticles of ZnS were obtained in hydrochloric acid and acetic acid addition. The diameters were in the range of 10 to 20 nm and 50 to 100 nm, respectively. In the case of a sodium chloride salt addition, a ZnS structure was obtained with a particle size of approximately 5 nm and a flake-like morphology. © (2014) Trans Tech Publications, Switzerland.
A forecasting tool for predicting Australia�s domestic airline passenger demand using a genetic algorithm
(Departamento de Ciencia e Tecnologia Aeroespacial, 2015) Panarat Srisaeng; Glenn Baxter; Steven Richardson; Graham Wild; G. Wild; RMIT University, School of Aerospace, Mechanical, and Manufacturing Engineering, Melbourne, 124 La Trobe Stm, 3000, Australia; email: graham.wild@rmit.edu.au
This study has proposed and empirically tested for the first time genetic algorithm optimization models for modelling Australia�s domestic airline passenger demand, as measured by enplaned passengers (GAPAXDE model) and revenue passenger kilometres performed (GARPKSDE model). Data was divided into training and testing datasets; 74 training datasets were used to estimate the weighting factors of the genetic algorithm models and 13 out-of-sample datasets were used for testing the robustness of the genetic algorithm models. The genetic algorithm parameters used in this study comprised population size (n): 200; the generation number: 1,000; and mutation rate: 0.01. The modelling results have shown that both the quadratic GAPAXDE and GARPKSDE models are more accurate, reliable, and have greater predictive capability as compared to the linear models. The mean absolute percentage error in the out of sample testing dataset for the GAPAXDE and GARPKSDE quadratic models are 2.55 and 2.23%, respectively. � 2015, Journal of Aerospace Technology and Management. All Rights Reserved.
A generalized E-learning usage behaviour model by data mining technique
(Universiti Utara Malaysia Press, 2014) Songsakda Chayanukro; Massudi Mahmuddin; Husniza Husni
Current study on e-Learning user's behaviour model obtained the specific models. In many cases, the e-Learning user's behaviour model for open source e-Learning system such as Moodle, which can predict learning outcome or learning performance is still deficient and cannot generally apply in many institutions due to the fact that the majority of prediction models were developed particularly for certain institutions. This study proposes to produce a general model that can make a prediction of learning outcome inspired by Skinner's theory, which explains the relationship between learner, achievement, and learner reinforcement. This study proposes similar patterns in e-Learning user's behaviour models of different institutions by the data-mining technique based on the learning environment theory. Therefore, this research is conducted in three main phases; include data preparation from weblog of different institutions with the same e-Learning system, data extraction by the accurate classifier model finding process and model verification for generating a verification pattern. The research outcome will be a similar pattern that could be used as a direction for creating a more appropriate e-Learning users' behaviour model and could be used broadly in other higher institutions.
A memorization approach for test case generation in concurrent UML activity diagram
(Association for Computing Machinery, 2019) Siriluck Lorpunmanee; Suwatchai Kamonsantiroj; Luepol Pipanmaekaporn
Test case generation is the most important part of software testing. Currently, researchers have used the UML activity diagram for test case generation. Testing concurrent system is difficult task due to the concurrent interaction among the threads and the system results in test case explosion. In this paper, we proposed a novel approach to generate test cases for concurrent systems using a dynamic programming technique with tester specification to avoid the path explosion. The tester can configure the concurrency specifications that follow the business flow constraints. In order to evaluate the quality of test cases, activity coverage and causal ordering coverage were measured. By experimental results, the proposed approach is superior as compared to DFS and BFS algorithms. Finally, the proposed approach helps to avoid generating all possible concurrent activity paths which are able to minimize test cases explosion. � 2019 Association for Computing Machinery.
A new Approach of Generalized Fractional Integrals in Multiplicative Calculus and Related Hermite-Hadamard-Type Inequalities with Applications
(Walter de Gruyter GmbH, 2024) Muhammad Aamir Ali; Michal Fe_kan; Chanon Promsakon; Thanin Sitthiwirattham; M. Fe_kan; Department of Mathematical Analysis and Numerical Mathematics, Comenius University in Bratislava, Bratislava, Mlynsk‡ dolina, 842 48, Slovakia; email: michal.feckan@fmph.uniba.sk
The primary goal of this paper is to define Katugampola fractional integrals in multiplicative calculus. A novel method for generalizing the multiplicative fractional integrals is the Katugampola fractional integrals in multiplicative calculus. The multiplicative Hadamard fractional integrals are also novel findings of this research and may be derived from the special situations of Katugampola fractional integrals. These integrals generalize to multiplicative Riemann-Liouville fractional integrals and multiplicative Hadamard fractional integrals. Moreover, we use the Katugampola fractional integrals to prove certain new Hermite-Hadamard and trapezoidal-type inequalities for multiplicative convex functions. Additionally, it is demonstrated that several of the previously established inequalities are generalized from the newly derived inequalities. Finally, we give some computational analysis of the inequalities proved in this paper. © 2024 Mathematical Institute Slovak Academy of Sciences.
A new class of four-point fractional sum boundary value problems for nonlinear sequential fractional difference equations involving shift operators
(University of Kragujevac, Faculty of Science, 2018) J. Reunsumrit; T. Sitthiwirattham
In this article, we study the existence result for a Riemann-Liouville fractional difference equation with four-point fractional sum boundary value conditions, by using the Sadovskii's fixed point theorem. Our problem contains the shift operators on fractional difference operators that are different orders. Finally, we present an example to show the importance of these result. � University of Kragujevac - Faculty of Science, 2018.
A New Latex Price Forecasting Model to Reduce the Risk of Rubber Overproduction in Thailand
(2012) Jitian Xiao; Panida Subsorn
One of the key areas in risk management in the public rubber industry in Thailand (PARIT) is to accurately forecast rubber latex prices thus to adjust rubber production in a timely manner. Accurately forecasting rubber latex price may not only reduce risks of overproduction and costs of over stocking, but also respond promptly and directly to global market thus improve in gaining higher sales in the competitive rubber marketing environment. This chapter presents a rubber latex price forecasting model, with three variations, i.e., one-year prediction, 6-month prediction and 4-month prediction, each embedding with either non-neural or neural network training techniques. The model is validated using actual rubber latex prices trend data, which in turn compared with experimental forecasting results to determine forecasting accuracy and the best-fitting model for policy makers in PARIT. © Springer-Verlag Berlin Heidelberg 2012.
A NEW q-HERMITE-HADAMARD'S INEQUALITY AND ESTIMATES FOR MIDPOINT TYPE INEQUALITIES FOR CONVEX FUNCTIONS
(University of Miskolc, 2023) Thanin Sitthiwirattham; Muhammad Aamir Ali; Asghar Ali; HŸseyin Budak; M.A. Ali; Jiangsu Key Laboratory of NSLSCS, School of Mathematical Sciences, Nanjing Normal University, 210023, China; email: mahr.muhammad.aamir@gmail.com
This paper proves a new q-Hermite-Hadamard inequality for convex functions using quantum integrals. We also prove some new midpoint-type inequalities for q-differentiable convex functions. Moreover, we present some examples to illustrate our established results, supplemented with graphs. © (2023) Miskolc University Press
A new study on the existence and stability to a system of coupled higher-order nonlinear BVP of hybrid FDEs under the p-Laplacian operator
(American Institute of Mathematical Sciences, 2022) Abdulwasea Alkhazzan; Wadhah Al-Sadi; Varaporn Wattanakejorn; Hasib Khan; Thanin Sitthiwirattham; Sina Etemad; Shahram Rezapour; T. Sitthiwirattham; Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: thanin_sit@dusit.ac.th; S. Rezapour; Department of Mathematics, Azarbaijan Shahid Madani University, Tabriz, Iran; email: sh.rezapour@azaruniv.ac.ir
In this paper, we study a general system of fractional hybrid differential equations with a nonlinear _p-operator, and prove the existence of solution, uniqueness of solution and Hyers-Ulam stability. We use the Caputo fractional derivative in this system so that our system is more general and complex than other nonlinear systems studied before. To establish the results, Green functions are used to transform the considered hybrid boundary problem into a system of fractional integral equations. Then, with the help of the topological degree theorem, we derive some sufficient conditions that ensure the existence and uniqueness of solutions for the proposed system. Finally, an example is presented to show the validity and correctness of the obtained results. © 2022 the Author(s), licensee AIMS Press.
A new study on two different vaccinated fractional-order COVID-19 models via numerical algorithms
(Elsevier B.V., 2022) Anwar Zeb; Pushpendra Kumar; Vedat Suat Erturk; Thanin Sitthiwirattham; P. Kumar; Department of Mathematics and Statistics, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, Punjab, 151001, India; email: kumarsaraswatpk@gmail.com
The main purpose of this paper is to provide new vaccinated models of COVID-19 in the sense of Caputo-Fabrizio and new generalized Caputo-type fractional derivatives. The formulation of the given models is presented including an exhaustive study of the model dynamics such as positivity, boundedness of the solutions, and local stability analysis. Furthermore, the unique solution existence for the proposed fractional-order models is discussed via fixed point theory. Numerical solutions are also derived by using two-steps Adams-Bashforth algorithm for Caputo-Fabrizio operator, and modified Predictor-Corrector method for generalised Caputo fractional derivative. Our analysis allows to show that the given fractional-order models exemplify the dynamics of COVID-19 much better than the classical ones. Also, the analysis on the convergence and stability for the proposed methods are performed. By this study, we see that how vaccine availability plays an important role in the control of COVID-19 infection. © 2022 The Author(s)
A new variant of Jensen inclusion and Hermite-Hadamard type inclusions for interval-valued functions
(University of Nis, 2023) Thanin Sitthiwirattham; Ifra Bashir Sial; Muhammad Aamir Ali; HŸseyin Budak; Jiraporn Reunsumrit; M.A. Ali; Jiangsu Key Laboratory of NSLSCS, School of Mathematical Sciences, Nanjing Normal University, Nanjing, 210023, China; email: mahr.muhammad.aamir@gmail.com
In this research, we give a new version of Jensen inclusion for interval-valued functions, which is called Jensen-Mercer inclusion. Moreover, we establish some new inclusions of the Hermite-Hadamard-Mercer type for interval-valued functions. Finally, we give some applications of newly established inequalities to make them more interesting for the readers. © 2023, University of Nis. All rights reserved.

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