Browsing by Resource Types "Conference Paper"
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Item4x4 High-Magnification Image Reconstruction Based on Hybrid of Multi-frame SR Approach and Image Super Resolve Algorithm( 2015-11) Vorapoj PatanavijitFrom tremendously soliciting high quality and high resolution images, sundry image reconstruction algorithms have been researched and implemented during the last fifteen years, especially for high-magnification image reconstructions. In this paper, we develop high-magnification image reconstruction based on hybrid of a multi-frame SR approach and an image super resolve algorithm for 4x4 magnifying in resolution. First, a group of polluted low resolution images are amalgamated for 2x2 magnifying in resolution and suppressing the noise in each polluted low resolution images. Next, the 2x2 magnified image is reconstructed by using image super resolve algorithm based on the high-frequency image prediction to be the 4x4 magnified image. In the performance testing section, the outcomes on both benchmark (in PSNR) and virtual quality, contrasting with previous classical algorithms from the research literature (such as a classical interpolation technique, a classical SRR and an image super resolve algorithm), expose that the proposed hybrid framework has the better performance in both benchmark (in PSNR) and virtual quality.
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ItemAcademic Use of Forums in eLearning - Perceptions, Findings and Truths( 2015-07) Nagi, KuldeepForums or threaded discussions are one of the most commonly used tools in online teaching. They provide a facility for asynchronous discussion on a particular topic or issue over an extended period of time. Students enrolled in eLearning courses are able to reflect upon their ideas before sharing them with others. eLearning is gradually becoming an alternate way of study for most young people who prefer to use the Internet, portable devices and digital media. While eLearning offers many advantages, it is often seen as faceless media that does very little to enhance social interaction, discussion or collaboration. Online interaction in eLearning courses becomes more restrained in countries where educational systems fail to prepare students to asking questions or sharing their ideas. This paper discusses tools for online communication, paying particular attention to the use of forums provided within a Learning Management System (LMS). This paper shares few perceptions, truths and findings about forums based on the data derived from Moodle “Reports” and logs of 4 online courses offered in a Information and Communication Technology (ICT) program at a local university. It evaluates the use of forums in terms of educational pedagogy and its advantages and limitations in a cultural context. This paper will be of use to those who value the forums as collaborative communication tool in virtual learning environments and how their usage could be measured and enhanced.
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ItemAdaptive Location Update Schemes for Continuous Cell Zooming Algorithm in Wireless Networks( 2015) Tun, Khin Cho ; Kunagorn KunavutContinuous cell zooming algorithm is a potential dynamic cell zooming algorithm for energy-efficient operation of mobile wireless networks. In this algorithm, location management strategy (location update process) is required to know the location of the farthest user in each cell to perform cell zooming. However, the application of conventional periodic update scheme in continuous cell zooming algorithm can lead to a high signaling cost. Therefore, in this paper, two adaptive location update schemes, namely, Time-Adaptive Periodic Update (TAPU) and Location-Adaptive Periodic Update (LAPU) are proposed aiming to reduce the number of update messages in continuous cell zooming operation. The performances of the proposed adaptive location update schemes are compared with that of Convention Periodic Update (CPU) scheme. Their performances are evaluated in terms of power saving capability, outage ratio and number of update messages raised in cell zooming operation in both omni-directional and sector-based cell networks. The TAPU and LAPU have no significant effect on power saving capability of continuous cell zooming algorithm and they give less number of update messages compared to CPU scheme. However, outage occurs in cell zooming operation with TAPU scheme because it has longer update intervals. Meanwhile the LAPU scheme can eliminate outage in cell zooming operation as CPU scheme does.
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ItemAirport of Thailand Employees’ Perception in Human-Organizational and Technological Primary BPR Factors and Their Causal Relationships Towards Airport Operational Performance( 2018-05-25) Shompunutt Na Ayudhya, P.In this research, the author explores the dimensions of Business Process Re-engineering (or BPR) in the context of airport management at Don Mueang and Suvarnabhumi airports; AOT’s bangkok-based airports. The data collection is done via the select set of questionnaires given to the airport employees (200 PAX) of key departments, within the 2 main concerns under BPR umbrella; A) “BPR Acceptance,” within it resides the set of variables relating to a.1) Human-related factors, a.2) Organization-related factors and a.3) Emotional responses; and B) “BPR Methods & Tools” which consist of b.1) Technological of facilitation and b.2) Perception of Airport Service Quality or ASQ. The research was conducted while there was a realization of BPR which are carried out by the airport ITbased application re-design (database migration from Oracle to SAP) which was aimed to assist the staffs in carrying out their daily tasks, and perception of ASQ in which it concerns the methods and tools; such as airport facilities the employees use to facilitate passengers. This ultimately resulting in higher job performance and assist them in accepting the concept of BPR; and intern boosting the service level for passengers who use the various airport services.
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ItemAlternating Least Squares with Incremental Learning Bias( 2015) Aung, Than Htike ; Rachsuda JiamthapthaksinRecommender systems provide personalized suggestions for every individual user in the system. Many recommender systems use collaborative filtering approach in which the system collects and analyzes users' past behaviors, activities or preferences to produce high quality recommendations for the users. Among various collaborative recommendation techniques, model-based approaches are more scalable than memory-based approaches for large scale data sets in spite of large offline computation and difficulty to update the model in real time. In this paper, we introduce Alternating Least Squares with Incremental Learning Bias (ALS++) algorithm to improve over existing matrix factorization algorithms. These learning biases are treated as additional dimensions in our algorithm rather than as additional weights. As the learning process begins after regularized matrix factorization, the algorithm can update incrementally over the preference changes of the data set in constant time without rebuilding the new model again. We set up two different experiments using three different data sets to measure the performance of our new algorithm.
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ItemAn Alternative Single-Image Super Resolution Framework Employing High Frequency Prediction Using A Robust Huber Rational FunctionIn general prospective, SI-SR or Single-Image Super-Resolution, which is one of the most useful algorithms of Super Resolution-Reconstruction (SRR) algorithms, is a mathematical procedure for acquiring a high-resolution image from only one coarse-resolution image, which is usually computed by Digital Image Processing (DIP). Even thought there have been substantially researched during the last decade, Single - Image Super-Resolution for applying on real implementations still keeps throw down the gauntlet. One of the practical Single- Image Super-Resolution is the resolution enhancement using prediction of the high-frequency image because of its high performance and its less comple xity however the rational function C(x, y) of high-frequency image prediction process of this technique is depend upon three parameters (b, h, k) therefore the parameter turning is difficult for maximizing its performance. From this problem prospective, this paper presents the alternative SI-SR framework employing robust rational function based on Huber function, which is depend upon only one parameter (T), instead of three parameters like the rational function C(x,y). Using up to fourteen standard images, which are crooked by varied noise models, in analysis testing section, the proposed SI-SR is demonstrated to be somewhat simper than the original SI-SR with equivalent efficiency because the saving in parameter turning time will be very important for SI-SR in real implementations.
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ItemAn Alternative SR Spatial Enhancement Based on Adaptive Meridian Filter and GOM Registration for Severe Noisy Blurred Videos( 2015-08) Kornkamol Thakulsukanant ; Vorapoj PatanavijitCommonly, filtering technique and the video registration technique are two main significance factors of a video SR (Super Resolution) enhancement algorithm. First, the classical filtering technique is based on a linear filter such as mean or median filter that are only suitable for noiseless or low power noise. Later, classical video registration techniques are usually based on a simple translation model because of the fast computation and easy implementation thereby this registration has high precision error. To get over both problems, this paper proposed the alternative SR spatial enhancement using adaptive meridian filter and GOM (General Observation Model) registration for severe noisy blurred videos. The adaptive meridian filter is a robust filter, which is desire for controlling high power outlier, and GOM is a high precision registration technique, which is desired for registering a fast spatial sequence. For proving the proposed performance, the simulated experiments are done in several environments as following: 1. Additive White Gaussian Noise (AWGN) at SNR=15, 17.5, 20, 22.5, 25dB; 2. Poisson Noise; 3. Multiplicative White Gaussian Noise (Speckle Noise) at V=0.01, 0.02, 0.03; 4. Salt and Pepper Noise at D=0.005, 0.010, 0.015. The proposed enhancement algorithm shows that the PSRN of the enhanced image is higher than the SR spatial enhancement based on classical filter with classical registration and GOM registration.
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ItemAnalysis of ASEAN Charter Related to ASEAN DSMs( 2015-10) Nattapat LimsiritongThe Association of Southeast Asia (ASEAN) are recognized as the well-known regional organization in South East Asia regional. As normal as other inter organizations, ASEAN also has its own Dispute Settlement Mechanism (DSM) to handle with the disputes among ASEAN Member States. Since the establishment of ASEAN in the cold war era till the heading to ASEAN Community by the end of 2015, there are many treaties related to DSM such as ASEAN Charter (2007), Treaty of Amity and Cooperation in Southeast Asia (1976, 1987, 1998, 2010), ASEAN Protocol on Enhanced Dispute Settlement Mechanism (1996, 2004), Protocol to the ASEAN Charter on Dispute Settlement Mechanisms (2010), and etc. This article will show the reader an overview of ASEAN DSM and how to apply these DSMs through the ASEAN Charter.
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ItemThe Antecedents and Consequences of Customer Engagement: An Exploratory Study on Mobile Network Business in Thailand( 2016-01) Suchira Phoorithewet ; Theingi ; Wang, Yunmei ; Sikankaew PanthongprasertThis study explores the antecedents and consequences of customer engagement behavior in the Thai mobile network business. A qualitative research using 15 interviews was conducted to identify the service quality dimensions, customer engagement behaviors and customer loyalty. The respondents’ main concerns were related to technical and functional service quality and their engagement behavior were addressed mostly in offline mode when they interacted with their family, friends and occasionally communicating to the mobile providers. It was found that the approach to switching behavior and cross-buying behavior were connected to customer loyalty behaviors. However, spending behaviors of customers may not be a good indicator for customer loyalty in mobile network business because those who do not have intention to switch to another brand do not necessarily increase their spending. In addition, most respondents are concerned with competitive promotional packages, which influence customer engagement behavior. Hence, it was proposed that service quality and competitive promotional packages are antecedents to customer engagement behaviors and all these factors are important in explaining customer loyalty toward mobile network providers in Thailand.
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ItemAntecedents and Consequences of Relationship Quality: An Exploratory Study on Hospitals in Thailand( 2015-01) Suppasit SornsriThe focal construct in this study is the relationship quality between the hospitals and the patients. The previous studies had developed relationship quality dimensions mostly in terms of “want to” aspect and tested their model in various B2B and B2C contexts. However, in several long-term relationships, “ought to” and “have to” aspects of relationship are also important in helping create the relationship longevity in spite of dissatisfaction in the relationship. Very few empirical researches on relationship quality have captured these dimensions. The objectives of this study were to explore the dimensions of relationship quality by using the Investment Theory (Rusbult, 1980); to explore the antecedents of relationship quality by applying the Transaction Cost Analysis (TCA) Theory (Williamson, 1985); and to explore the consequences of relationship quality by using the Exit-Voice Theory (Hirschman, 1970). The in-depth interviews were conducted with 25 respondents who usually visit the same hospital. Trust, inertia, and dependence were found to be the dimensions of relationship quality. The results also found that the antecedents of relationship quality included doctor expertise, knowledge on patient, patient familiarity, perceived hospital image, doctor effective communication, patient switching risks, and hospital alternative scarcity. The three consequences of relationship quality revealed from the in-depth interviews included constructive feedback, revisit intention, and switching intention. All these antecedents and consequences were also found supported in previous literatures.
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ItemAntibacterial Activity of Thai Red Curry Paste in Kang-Kati (Thai Red Curry) Model on Salmonella enterica Typhimurium DT104b( 2013-06) Patchanee YasurinNowadays food safety becomes an international concern. Natural antibacterial is now become very interesting food safety trend. The investigation on the food itself having antibacterial activity becomes more dynamic. Salmonella sp. has been reported its outbreaks recently in different variety of food. Kang-Kati (Thai red curry) is a Thai cultural dish and also worldwide well-known menu. The Thai red curry paste, Thai red curry’s main ingredients, compose of many herbs including Capsicum annuum (Red chili), Cymbopogon citrates (Lemongrass), Alpinia galangal (Galangal), Allium ascalonicum L (Shallot), Allium sativum (Garlic), Citrus hystrix (kaffir lime), Cuminum cyminum (Cumin). Therefore, this study aimed to investigate the potential of Thai red curry paste in Kang-Kati using fresh coconut milk model as natural antibacterial agent against S. enterica Typhimurium DT104b. Kang-Kati was prepared according to Thai homemade authentic cooking method as it has been served in Thai cuisine and was inoculated with 1% culture. Thai curry paste in-vitro antibacterial activity was evaluated by cell count serial dilution method on SS media every hour for 6 hrs at room temperature. The result showed that the level of S. enterica Typhimurium DT104b in Kang-Kati was significant lower than of positive control (NB) (P<0.05) in 6th hour; 8.32±0.04, 8.02±0.08 log CFU/ml, respectively. The t-test has been done by using SPSS on log CFU/ml with P < 0.05. It is indicated that Thai red curry paste in Kang-Kati model showed promising combinated antibacterial activity against food-borne pathogenic bacteria, S. enterica Typhimurium DT104b.
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ItemThe antimicrobial and shelf-life study of vegetable sanitizer from herbal extracts and Acacia concinna(Willd.) D.C’s pod water( 2015-11) Patchanee YasurinIn the past 3 years, the Centers for Disease Control and Prevention (CDC) reported that there were at least 7 outbreaks in fresh produces, for example; Escherichia coli O121 in raw clover sprouts (2014), E. coli O157:H7 in ready-to-eat salads (2013), and Salmonella Saintpaul in cucumbers (2013). The cleaning of fresh produces is the first step in order to prevent foodborne outbreak. Therefore, this experiment aims to study and develop the shelf life of vegetable sanitizer from Thai herb crude extracts including Cymbopogon citratus (Lemongrass), Citrus hystrix (Kaffir lime), Chrysanthemum indicum (Chrysanthemum) and Acacia concinna (Willd.) D.C’s pod (Som-poi) water compared with 2 commercial brands namely Jirada and Veggie. To achieve this goal, antibacterial activity and shelf-life study were determined by antimicrobial efficiency experiment using total plate count. In this study, the vegetable sanitizer was prepared by adding 1.5% of each 0.2 g/ml crude extracts into Som-poi’s pod water and then sterilized at 121 ºC for 15 minutes. Lactuca sativa (Lettuce) using as vegetable model was soaked in 1 % of the vegetable sanitizer in water for 20 minutes before determination antibacterial activity of the vegetable sanitizer every 2 weeks for 10 weeks. Surprisingly, the results showed that the highest percentage of antimicrobial efficiency was 99.70±0.13. Although the percentage of antimicrobial efficiency decreased significantly after the 6th week; however, antimicrobial efficiency of the vegetable sanitizer remained higher than 90% up to 10 weeks. There was no significant difference of antimicrobial efficiency among 2 commercial brands and the vegetable sanitizer for 8 weeks. In conclusion, the results illustrated hat the vegetable sanitizer from Thai herbal extracts and A. concinna (Willd.) D.C’s pod water was excellent in antibacterial activity as well as a commercial brand however it could be more value in terms of a green vegetable sanitizer.
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ItemThe antimicrobial, antibrowning, and shelf-life study of fruit and vegetable sanitizer from herbal extracts( 2015-09) Patchanee YasurinIn the past 3 years, The Centers for Disease Control and Prevention (CDC) reported that there were at least 7 outbreaks in fresh produces , for example; Escherichia coli 0121 in raw clover sprouts (2014), E. coli 0157:H7 in ready-to-eat salads (2013), and Salmonella Saintpaul in cucumbers (2013). The cleaning of fresh produces is the first step in order to prevent foodbome outbreak. Therefore, this research was aimed to develop and study the shelf life of fruit and vegetable sanitizer from Thai herb crude extracts including Chili (Capsicum annuum), Lemongrass (Cymbopogon citratus), Kaffir lime (Citrus hystrix),. Chrysanthemum (Chrysanthemum indicum . L) and Som-poi (Acacia concinna (Willd.) D.C). The fruit and vegetable sanitizer was prepared by adding 1.5% of each 0.2 mg/ml crude extracts into Som-poi's pod water and was sterilized at 121 °C for 15 min. The percentage of antimicrobial efficiency was used for evaluating the antibacterial activity and studying shelf-life comparing with 2 commercial brands (Jirada and Veggie). Lettuce (Lactuca sativa) as vegetable model was soaked in 1 % sanitizer for 20 min and was done for total plate count every month for 3 months. The results showed that the fruit and vegetable sanitizer had the highest percentage of antimicrobial efficiency in 151 and 2nd month; 87.00±13.58, 78.70±25.01, respectively. The antimicrobial efficiency was significantly decreased after 2nd month. This indicated that the fruit and vegetable sanitizer from herb extracts showed antibacterial activity and its shelf-life was only 2 months. For antibrowning activity, apple (Ma/us domestica), as fruit model, was soaked in 0.1 % fruit and vegetable sanitizer for 2 min, and then color was measured by using colorimeter every 10 min for 50 min. The total color difference (!1£) was used to evaluate the antibrowning activity. The results showed that fruit and vegetable sanitizer had no antibrowning activity.
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ItemAntioxidant activity of Allium tuberosum Rottl. ex Spreng under different extraction methods( 2015-11) Patchanee Yasurin ; Napatsorn Lawthienchai ; Aussama SoontrunnarudrungsriThe Bang-Phae organic vegetable grower community enterprise group, Ratchaburi province is one of the big Chinese chives (Allium tuberosum Rottl. ex Spreng) grower in Thailand. However, some Chinese chives did not meet standard and were sorted out. The Chinese chives essential oil, which contains many new and known bioactive compounds, is valued product from sorted out Chinese chives. Therefore, this experiment was aimed to study the antioxidant activity of Chinese chive extracts using 17 different extraction conditions (Steam distillation for 1.0, 2.0, 2.5, 3.0 hour; Ohmic pretreatment with steam distillation for 1.0, 2.0, 2.5, 3.0 hour; 95% ethanol, hexane, oil extract using dry, fresh, freeze Chinese chives). The ferric reducing antioxidant potential assay was used to evaluate antioxidant activity of Chinese chive extracts. The results showed that the highest antioxidant activity was 1.756 ± 0.008 µmol Fe2+/ mg sample of freeze Chinese chives extracted with hexane. The antioxidant activity was vary from 0.098 ± 0.005 - 1.756 ± 0.008 µmol Fe2+/ mg sample depend on the extraction condition.
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ItemAre social media replacing traditional media in terms of brand equity creation in Thailand?( 2015-11) Gaan Muthukan ; Kriengsin PrasongsukarnIn Thailand, companies’ media expenditure is transferred to social media gradually since consumers are habitually online nowadays (Friedrich et al., 2010). Therefore, this research aims to identify the relationship of brand communications towards brand equity. The communications are divided to traditional media and social media. Moreover, for a deeper understanding, social media is separated into firm- created and user-generated social media communication. Additional factors studied are brand awareness, functional brand image, hedonic brand image, brand attitude and purchase intention. An online questionnaire was designed to 200 respondents who are Thai, had experienced of online advertisement. The data was collected by using convenient sampling method. Correlation analysis and reliability test were used to test the research hypotheses and examine reliability and validity of measurement constructs. The results indicated that traditional media has the least positive relationship on every dimensions of brand equity compared to social media communication. User-generated social media communication overcomes firm-created social media communication on brand awareness and functional brand image but has nearly equal relationship on hedonic brand image. The findings suggest that the combination of traditional media and social media usage is necessary for companies to build their brand equity.
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ItemBall On The Plate Model Based on PID Tuning Methods( 2016) Narong Aphiratsakun ; Otaryan, NaneController design is one of the important steps during the modelling of various systems, starting with constructing an electric kettle to an aircraft system. To achieve a good controller it is needed to define suitable values for the controller coefficients. This paper describes the research practices of the tuning technique by using MATLAB/Simulink compared with manually PID tuning based on the trial and error process, as well as, PID tuning methods from Ziegler- Nichols and Tyreus-Luyben (closed-loop proportional gain control or P-Control tests). The paper can be useful for readers who want to have a basic knowledge of research assignments based on PID tuning.
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ItemBank Stock Return Sensitivity to Interest Rate Changes in Thailand( 2015-01) Sirikarn Jeanchutima ; Nopphon TangjitpromMany studies were trying to explain the changes of stock returns by finding the factors impact on a certain market, industry, or stock. Focusing on the financial institution especially commercial bank, there are some research proved that interest rate is one of the crucial factor impact the commercial bank stock returns. Interest rate is the cost and return of money in financial market since commercial bank acts as major financial intermediary; therefore, interest rate is still the majority of its cost and return. In Thai stock market shows different result, the changing in interest rate reflects slightly on the change in stock returns. After taking a close look, the conclusion can be drawn from outcomes the bigger size of the bank experience the larger effect. Thus, bank size is not a real moderator affect the relationship, the trading volume of the bank is the real relevant factor. Consequently, the theory can be hold only if the market participants trade all bank stock equally.
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ItemThe Bilateral Denoising Performance Influence of Window, Spatial and Radiometric Variance( 2015-08) Vorapoj PatanavijitIn the research operation of Digital Signal Processing (DSP) and Digital Image Processing (DIP), one of the most essential obstacles is the image denoise algorithm by the reason of a very large demand of high quality noise-free images therefore there are many image denoise algorithms have been invented in the time of two decades. Bilateral filter is one of the most impressive and feasible algorithms, which is usually applied for denoise propose, but the performance of the Bilateral filter is substantially bank on three parameters: spatial variance, radiometric variance and window size. Consequently, this paper investigates the performance influence impact of spatial variance, radiometric variance, window size for the Bilateral Filter in the denoise propose. In the denoise experiment, Bilateral filter (BF) is applied on three noisy standard images under five Gaussian noise power levels and the best results in the PSNR prospective point of view from deniose algorithm is picked. Moreover, an optimal value of three parameters: spatial variance, radiometric variance, window size, which make the performance of Bilateral filter the highest PSNR, are extensively investigated for each types of tested images and each noise powers.
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ItemBrain Circulation: the Issue of Brain Drain and Brain GainNowadays in our modern society, globalization and advanced technology have led to new ways of learning. Until the end of the 20th century, learning occurred particularly through traditional way of learning such as in-class education. Students or learners did not have the choice in the way of learning – in-class or online – they had to go to class and learn in the classroom with teachers and other students. Since the end of the 20th century and the beginning of the 21st century new ways of learning have emerged: it is now possible in nowadays modernized society to study and learn outside the classroom thanks to new technologies including internet and social networks. This type of learning is commonly called ‘e-learning’ referring to online education. After reviewing documents, researches, dissertations and theses related to this topic, this article will aim at emphasizing the importance of online learning in today’s society, as well as the difficulties the latter is facing to be used, implemented and developed due to its ‘newness’. When it comes to comparing online education and traditional classroom learning, it seems that the key advantages of online education are flexibility, accessibility and availability at all times and places. These give learners the advantage to get connected to their education wherever they are and whenever they need to, which is not the case for traditional in-class learning. Therefore, online education should be nowadays implemented and developed as much as traditional education, considering its numerous long term advantages and benefits.