SCOPUS 2010-2014

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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 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 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 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 reinvestigation of EXAFS and EPR spectroscopic measurements of chromium(VI) reduction by coir pith
(2010) Parinda Suksabye; Niramon Worasith; Paitip Thiravetyan; Akira Nakajima; Bernard A. Goodman; B.A. Goodman; Health and Environment Department, Unit of Environmental Resources and Technologies, Austrian Institute of Technology, Seibersdorf A-2444, Austria; email: bernard_a_goodman@yahoo.com
New measurements using extended X-ray absorption fine structure (EXAFS) and electron paramagnetic resonance (EPR) techniques are consistent with Cr in the Cr(III) oxidation state as the main product from the adsorption of Cr(VI) on coir pith. These confirm the previous X-ray measurements, but differ from the results of previous EPR studies, which indicated that Cr(V) was the main form of Cr. The reason for this discrepancy is the presence of a broad signal from Cr(III) in an unsymmetrical environment that was missed previously; the Cr(V) component is in fact only a minor reaction product. As a result of this problem with spectral acquisition and interpretation, some simple recommendations are presented for conducting EPR investigations on natural systems. © 2010.
A simple method for large-scale synthesis of nano-sized zinc sulfide
(Trans Tech Publications Ltd, 2014) Weerachon Phoohinkong; Thitinat Sukonket
Nano-sized zinc sulfide (ZnS) is a special property semiconductor material widely used in many applications such as catalyst, light emitting diode, transistor, gas sensors, biosensors, UV-light sensors, and photovoltaic cell. The wet chemical method is a simple and low-cost method to prepare nano-sized zinc sulfide. However, the wet chemical reaction using sodium sulfide without surfactant or template has rarely been reported. In the present work nano-sized zinc sulfide particles were synthesized by simple wet chemical reaction method at room temperature and without any surfactant. The influence of sulfur source, sodium sulfide and potassium sulfide used as the reactant were investigated. The samples were characterized by scanning electron microscopy coupling with energy-dispersive X-ray spectroscopy (FESEM-EDX), and transmission electron microscopy (TEM). The results show that the nanoparticles of zinc sulfide were obtained from sodium sulfide and potassium sulfide with particles sizes are in the range of 10 to 50 nm and 25 to 50 nm respectively. In addition, from FESEM microphotograph the primary ZnS particles size of around 5 nm and 25 nm were obtained by 10% salt (sodium chloride, potassium chloride, sodium acetate) addition with sodium sulfide and potassium sulfide reactant respectively. © (2014) Trans Tech Publications, Switzerland.
All-optical logic and and or gates generated by dark-bright soliton conversion
(2013) P. Phongsanam; C. Teeka; R. Jomtarak; S. Mitatha; P.P. Yupapin; P.P. Yupapin; Advanced Research Center for Photonics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: kypreech@kmitl.ac.th
In this paper, a novel system of simultaneous optical logic AND and OR gates using dark-bright soliton conversion within the add/drop optical filter system is proposed. By using the dark-bright soliton conversion concept, the switching output signal response time of ns can be obtained. The input logic '0' and control logic '0' are formed by using the dark soliton pulse (D) trains. We found that the simultaneous optical logic AND and OR gates at the drop and through ports can be formed, respectively. The comparison data of the commercial system is also given, which is shown that the proposed system has the advantage over the commercial ones. © 2012 Elsevier GmbH. All rights reserved.
All-optical nanoscale microring device and system design for nano communication
(Elsevier Ltd, 2012) N. Sangwaranatee; N.W. Sangwaranatee; C. Teeka; P.P. Yupapin; N. Sangwaranatee; Applied Physics, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok 10300, Thailand; email: narong_5@hotmail.com
In this paper, we have shown that the two components (TE and TM waves) of polarized light are manipulated by using the orthogonal soliton pair within a PANDA ring resonator known as a dark-bright soliton pair. In operation, the orthogonal soliton sets can be generated by using the system. The optical field is fed into the ring resonator system, which is controlled by an optical switch by using a single microring. To form the initial spin states, the magnetic field is induced by an aluminum plate (Al) coupled on AlGaAs waveguides for optoelectronic spin-up and - down states. The optoelectronic spin is formed by using the TE and TM wave components. In this manipulation, the electromagnetic radiation is formed by using the orthogonal soliton pulses. In fact, they are photons, which behave like elementary particles. Hence, the spin axis of photon is always parallel to its direction of motion. Many orthogonal sets are also available and existed, in which the spin conservation of many particles is maintained for large scale system use. Therefore, for future applications, the use for high performance storage, low power magnetic logic, quantum logic, quantum gate, nano antenna, nano radio, and applications of spintronic sensing can be realized based on realistic device parameters. © 2010 Published by Elsevier Ltd.
All-optical switches based-on GaAs/AlAs quantum dots vertical cavities
(Elsevier Ltd, 2012) C. Teeka; R. Jomtarak; P. P. Yupapin; C. Teeka; Scientific Equipment Center, Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok, 10700, Thailand; email: chat_tee@dusit.ac.th
In this paper, we present an all-optical switch based on self-assembled GaAs/AlAs quantum dots (QDs) within a vertical cavity. Two essential aspects of this novel device have been investigated, which includes the QD/cavity nonlinearity with appropriately designed mirrors and the intersubband carrier dynamics inside QDs. Verticalreflection- type switches have been investigated with an asymmetric cavity that consists of 12 periods of GaAs/Al0.8Ga0.2As for the front mirror and 25 periods for the back mirror. The thicknesses of the GaAs and AlGaAs layers are chosen to be 89 and 102 nm, respectively. To give a dot-in-a-well (DWELL) structure, 65nm dimension of Si was deposited within an 20nm AlAs QW. All-optical switching via the QD excited states has been achieved with a time constant down to 750 fs, wavelength tunability over 29.5 nm. These results demonstrate that QDs within a vertical cavity have great advantages to realize low-power consumption polarization-insensitive micrometer-sized switching devices for the future optical communication and signal processing systems. © 2010 Published by Elsevier Ltd.
An evaluation of educational provision quality at graduate level of rajabhat universities: Multi-level analysis
(Canadian Center of Science and Education, 2012) Rungnapa Tangchitcharoenkhul; Nonglak Wiratchai; R. Tangchitcharoenkhul; Suan Dusit Rajabhat University, Dusit, Bangkok 10300, Ratchasima Road 295, Thailand; email: atrungnapa@yahoo.com
The purposes of this research were 1) to analyze the educational provision quality scores at graduate level of Rajabhat universities by programs and to analyze the guideline for improving no quality programs at graduate level of Rajabhat universities using Data Envelopment Analysis (DEA) and 2) to analyze 2 level variables (micro level and macro level) that affected to the educational provision quality at graduate level of Rajabhat universities using multi-level analysis. The DEA and multi-level analysis collected by questionnaires from 1,608 of 5 groups of stakeholders (administrators, faculty members, students, alumni and employers). The estimated educational provision quality scores of 27 programs ranged from 45.52-100.00%. The numbers of educational provision quality programs were 11, 9, 10, 9 and 7 evaluating from administrators, faculty members, students, alumni and employers. Of those improving no quality programs, they were increased outputs/outcomes; percentage of a student who graduates within period of time, numbers of published of faculty members' researches, numbers of alumni award, numbers of utilization of faculty members' researches and value-added of students in order to enhance their performance to increase their quality. The result of multi-level analysis indicated that factors explaining the quality of programs were numbers of university campus, administrator academic leadership and Office of the Higher Education Commission monitoring.
An improved feature extraction and combination of multiple classifiers for query-by-humming
(Zarka Private Univ, 2014) Nattha Phiwma; Parinya Sanguansat
In this paper, we propose new methods for feature extraction and soft majority voting to adjust efficiency and accuracy of music retrieval. For our work, the input is humming sound which is sound wave and Musical Instrument Digital Interface (MIDI) is used as the reference song in database. A critical issue of humming sound are variation such as duration, sound, tempo, key, and noise interference from both environment and acquisition instruments. Besides all the problems of humming sound we have mentioned earlier, whether humming sound and MIDI in different domain which will make the difficulty for two domains to compare each other. However, to make these two in the same domain, we convert them into the frequency domain. Our approach starts from pre-processing by using features for note segmentation by humming sound. The process consists of four steps as follows: Firstly, the MIDI is already a sequence of pitch while the pitch in humming sound is needed to extract by Subharmonic-to-Harmonic (SHR). Subsequently, the extracted pitch can be used to calculate all above attributes and then multiple classifiers are applied to classify the multiple subsets of these features. Afterwards, the subset contain the multiple attributes, Multi-Dimensional Dynamic Time Warping (MD-DTW) is used for similarity measurement. Finally, Nearest Neighbours (NN) and soft majority voting are used to obtain the retrieval results in case of equal scores. From the experiments, to achieve 100% accuracy rate at the early top-n rank in retrieving, the appropriate feature set should consist of five classifiers.
An optical buffer manipulation using a microring array
(2011) Suphanchai Punthawanunt; Chat Teeka; Rangsan Jomtarak; Preecha P. Yupapin; S. Punthawanunt; Faculty of Science and Technology, Kasem Bundit University, Bangkok 10250, Thailand; email: suphanchai@kbu.ac.th
We present design and FDTD simulations of microring resonator array optical buffer. The proposed buffer consists of six microring array coupled via upper MZI arm and one microring coupled via lower MZI arm all coupled with 105 nm gap coupling. Results obtained have shown that the delay signals can be available for the use for optical memory and applications.
Anomaly detection based on GA&FART approach of computer network security
(2012) Preecha Somwang; Woraphon Lilakiatsakun; Surat Srinoy; P. Somwang; Faculty of Information Science and Technology, Mahanakorn University of Technology, Bangkok, Cheumsampan Road, Thailand; email: preechak@nmc.ac.th
The problems of intrusion detection in a computer network security are difficulty of having a protective line in the information security against attackers. Researchers have developed Intrusion Detection System (IDS) which is capable of detecting attacks in several available environments. This paper aims to provide the intrusion detection technique into the system by using integrates like the Genetic Algorithm (GA) with the Fuzzy Adaptive Resonance Theory (FART). The GA is applied to randomly select the best attribution and reduction to the featured space. The FART is used to classify different group of data: Normal and Anomalous. The results show that this proposed technique can improve the performance of anomalous detection, showing the high performance of the detection rate and minimizing the false alarm rate. The approach was evaluated on the benchmark data from KDDCup'99 data set.
Antimicrobial and antioxidant activities of traditional Thai herbal remedies for aphthous ulcers
(2010) Chantana Mekseepralard; Narisa Kamkaen; Jenny M. Wilkinson; C. Mekseepralard; Department of Microbiology, Faculty of Medicine, Srinakharinwirot University, Klongtoei, Wattana, Bangkok 10110, Thailand; email: chantana@swu.ac.th
Four medicinal plants (Quercus infectoria, Kaempferia galanga, Coptis chinensis and Glycyrrhiza uralensis) as well as one traditional Thai treatment for aphthous ulcers based on these four plants were tested for antimicrobial activity. MIC values for a range of bacteria and Candida albicans were determined, with both type strains and clinical isolates being used. Antioxidant activity was determined using the ABTS radical scavenging assay. Among the four plants, Q. infectoria showed antimicrobial activity against Staphylococcus aureus with an MIC of 0.41 mg/mL, while C. chinensis showed antifungal activity against C. albicans with an MIC of 6.25 mg/mL. Activity was also shown against a range of other organisms including Salmonella typhi, Serratia marcescens, Vibrio cholerae, Vibrio parahaemolyticus, Pseudomonas aeruginosa and Enterococcus faecalis. The antimicrobial activity of the traditional aphthous ulcer preparation (a powder) was comparable to that for the individual plant extracts, however, incorporation of the powder into a gel formulation resulted in the loss of almost all activity. All extracts, with the exception of K. galanga, also showed good antioxidant activity. This study supports the traditional use of these plants and suggests that they may also be useful in the treatment of other infections. © 2010 John Wiley & Sons, Ltd.
Artocarpin-enriched extract reverses collagen metabolism in UV-exposed fibroblasts
(Versita, 2014) Khwunjit Itsarasook; Kornkanok Ingkaninan; Jarupa Viyoch; J. Viyoch; Department of Pharmaceutical Technology, Naresuan University, Phitsanulok, 65000, Thailand; email: jarupav@nu.ac.th
In previous studies, the Artocarpus incisus extract containing 45% w/w artocarpin showed activities of antioxidation, antimelanogenesis and restoration of wrinkled-skin fibroblasts. Here, extract containing 90% w/w artocarpin was tested for its antioxidant activity and in ultraviolet (UV) A-irradiated fibroblasts, its ability to restore type I collagen and inhibit matrix metalloproteinase-1 (MMP-1) elevation. This extract was a less effective antioxidant of EC50 of 116.0 ± 5.1 _g/mL than L-ascorbic acid (9.7 ± 0.01 _g/mL). The extract (0.625-50 _g/mL) showed no cytotoxicity toward primary human skin fibroblasts. MMP-1 was markedly elevated at 72 h after UVA irradiation compared to non-irradiation cells (p < 0.01). This UVA-induced elevation was inhibited by 50 _g/mL extract or 50 ng/mL all-trans retinoic acid. In an aged and sun-exposed skin tissue culture model, the increase of epidermal thickness in the 250 _g/mL artocarpin-enriched extract or 75 _g/mL all-trans retinoic acid-treated group when compared to the non-treated group was markedly observed since day 1 of treatment. Moreover, the extract or all-trans retinoic acid-treated groups exhibited higher density of immunofluorescence staining of type I collagen than non-treated group. This coincides with significantly higher (p < 0.05) collagen content, as indicated by measuring hydroxyproline. Our results firstly revealed that the artocarpin-enriched extract reversed the activities of UVA-irradiated fibroblasts and improved the type I collagen deposition in aged/photoaged skin. © 2014 Versita Warsaw and Springer-Verlag Wien.
ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm
(2011) C. Teeka; S. Songmuang; R. Jomtarak; P.P. Yupapin; M.A. Jalil; I.S. Amiri; J. Ali; C. Teeka; Scientific Equipment Center, Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok 10700, Thailand; email: chat_tee@dusit.ac.th
We present a new concept of ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm by using OptiWave FDTD method. By microring resonator increase from one to three microring (SR to TR), we found that the amplitude shift keying (ASK) are increase exactly and the phase shift keying (PSK) is equal to ¹. © 2011 American Institute of Physics.
ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm
(2011) C. Tanaram; C. Teeka; R. Jomtarak; P.P. Yupapin; M.A. Jalil; I.S. Amiri; J. Ali; C. Tanaram; Faculty of Science and Technology, Kasem Bundit University, Bangkok 10250, Thailand; email: tchanapk@gmail.com
We present a new concept of ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm by using OptiWave FDTD method. By microring resonator increase from one to three microring (SR to TR), we found that the amplitude shift keying (ASK) are increase exactly and the phase shift keying (PSK) is equal to ¹.
Atom bottom-up manipulation controlled by light for microbattery use
(2012) Farrah Dilla Zainol; Rangsan Jomtarak; Suzairi Daud; Chat Teeka; Jalil Ali; Preecha P. Yupapin; F.D. Zainol; Institute of Advanced Photonics Science, Nanotechnology Research Alliance, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia; email: fairy-elie@yahoo.com
In this paper, we propose a new design of the atom bottom-up technique that uses an optical trapping tool to form the atom trapping layer within a thin-film grating. By using a PANDA ring resonator, where atoms can be trapped, pumped, and controlled by light, the trapped atoms/molecules can be selected, filtered, and embedded within the required thin-film grating layers to manufacture nanobattery. In application, P-type or N-type atom can be prepared, trapped, and embedded within the desired thin-film layers, and finally, the microbattery can be manipulated. The theoretical background of light pulse in a PANDA ring resonator is also reviewed. © 2002-2012 IEEE.
Benzene adsorption by plant leaf materials: Effect of quantity and composition of wax
(2013) Chairat Treesubsuntorn; Parinda Suksabye; Sawitree Weangjun; Fonthip Pawana; Paitip Thiravetyan; P. Thiravetyan; School of Bioresources and Technology, King Mongkut's, University of Technology Thonburi, Bangkok 10150, Thailand; email: paitip.thi@kmutt.ac.th
Twenty-one plant leaf materials were screened for benzene adsorption efficiency in the static system, and the leaf material from Dieffenbachia picta, Acrostichum aureum, Ficus religiosa, Lagerstroemia macrocarpa, Alstonia scholaris, and Dracaena sanderiana were found to have high potential for benzene removal. The relation between quantity and composition of wax to benzene removal efficiency was studied. Although high quantities of wax occurred in some leaf materials, low benzene removal was clearly found if compared with other plant materials with the same wax quantity. Alpha-linoleic acid and dodecyl cyclohexane were found to be the main composition in plant leaf materials with high benzene adsorption, and it might be a key factor for benzene removal. © Springer Science+Business Media Dordrecht 2013.
Biodegradation of paraquat by the novel bacterial strain aeromonas Veronii NK67 from cassava fields in Thailand
(EM International, 2014) Nuttabodee Viriyawattana; S. Surachat
The herbicide paraquat residues in Cassava field have been shown to cause adverse human health effects and soil degradation, leading to decreased crop productivity. Bioremediation is the effective way to solve this problem. This study focused on selecting soil bacteria that are capable to degrade paraquai The 283 soil samples were collected from Cassava field in Nakhon Ratcha Sima provinces, because of paraquat is one of the most widely used chemical herbicides in this area. All 112 isolates have been isolated. Among them, there were 6 isolates tolerance to paraquat concentration 1 mM, including 4 and 2 strains of Clostridium spp. and Aeromonas spp., respectively. The isolates were further tested for their efficacy to degrade paraquat. The results showed that only two strains of Aeromonas spp. (strain NK 66 and MC 67) were able to degrade paraquat. It was found that levels of paraquat decreased to 4.9 ppm (24.36%) and 10.68 ppm (53.4%) after exposed to Aeromonas spp. Strain MC 66 and MC 67, respectively. Molecular Methods to Identify Aeromonas spp. strain NK 67 using PCR-amplified 16S rRNA genes sequencing were employed. Nucleotide sequence of 16S rRNA from Aeromonas spp. strain NK 67 was compared with nucleotide sequences from GenBank database by using BLAST program. The results showed that 99% similar to 16S rRNA from A. veronii strain ATCC 35624, according to the results of classification by Bergey's Manual of Systematic Bactedology Then it can be conclude that this bacteria is A. veronii N1C67 (JN880412). This is the first report that A. veronii exhibited high efficiency to degrade paraquat which can be further applied for remediation of paraquat in contaminated areas and going for commercial production. © Global Science Publications.

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