Mueang Nonthaburi, Thailand

Sukhothai Thammathirat Open University

www.stou.ac.th
Mueang Nonthaburi, Thailand

Sukhothai Thammathirat Open University or STOU is one of the two open universities in Thailand. Wikipedia.

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Romsaiyud W.,Sukhothai Thammathirat Open University
2016 IEEE 7th Annual Ubiquitous Computing, Electronics and Mobile Communication Conference, UEMCON 2016 | Year: 2016

Expectation-Maximization (EM) is typically used to compute maximum likelihood estimates given incomplete samples and estimated the parameters. We proposed a new algorithm for generating an extension Dynamic Topic Model (exDTM)-in a time-based manner and based on the distribution of documents topics on Spark. The proposed algorithm can be applied in clustering documents from data streams for threat cyberbullying detection of the collected datasets that continuously change over time. In particular, the algorithm includes two main methods. The first method introduces a clustering method rooted in content-based coded dialogues collected from several data sources. This method measures the centroid for each cluster with EM. The second method calculates the joint distribution of the latent variables of the documents for finding the posterior distribution, and generates a final model using a variational Bayesian inference over a sequential time. In this experiment, authentic datasets collected from year - 2010 to 2011 - using corpus-wide patterns of words-were analyzed and studied. In order to enhance the reliability and computation time, the methods were applied on real-life settings where cyberbullying features and user-based features had experienced. © 2016 IEEE.


Sitjongsataporn S.,Mahanakorn University of Technology | Nurarak P.,Sukhothai Thammathirat Open University
Proceedings - 31st IEEE International Conference on Advanced Information Networking and Applications Workshops, WAINA 2017 | Year: 2017

In this paper, a variable leaky normalised orthogonal gradient adaptive algorithm approach and leaky criterion is proposed for wireless communications in areas of adaptive signal processing. In order to enhance convergence rate and a low misadjustment error, a leak criterion is introduced with a quantised leak adjustment function. A convergence analysis of proposed modified leaky mechanism is presented. Simulation results confirm that the proposed algorithm can significantly outperform the convergence rate compared with the existing algorithm. © 2017 IEEE.


Kritpolviman K.M.,Sukhothai Thammathirat Open University
13th International Symposium on Communications and Information Technologies: Communication and Information Technology for New Life Style Beyond the Cloud, ISCIT 2013 | Year: 2013

This paper presents the modified perspective for analysis of wireless sensor network correlation regions and representative nodes. In order to achieve distortion-tolerant communication, the methodology is based on the spatio-temporal correlation regarding distortion effects due to surrounding environments. Several sensor nodes observing data are selected regarding the random changes of propagation paths at each different observation time. Simulation results present that distortion effects at each observation time cause different correlation regions and the representative nodes. The closed forms of computational efforts based 1-D/2-D distributive sensor network are also proposed. © 2013 IEEE.


Srivatanakul T.,Sukhothai Thammathirat Open University
27th International Conference on Computer Applications in Industry and Engineering, CAINE 2014 | Year: 2014

Information security policy serves as a vital part of an organization's strategy to ensure the effectiveness of information security. Developing an information security policy is however a challenging task. It is often that authors rely upon the existing information security standards for guidance, their own experience and skills or available checklist and statement templates for reference. A security policy which is developed in an ad-hoc and unsystematic manner can be viewed as the root of the weak link to the whole security enforcement process. A more systematic approach to the writing and reviewing of information security policy is seen as one approach to add rigor to the process, which can help to reduce flaws in the information security policy document, thus enhance the effectiveness of the policy. This paper applies a deviational analysis which is traditionally used in analyzing safety of systems to the analysis of information security policy statements. The case samples show that the technique offers more rigorous and thorough consideration of various aspects when analyzing security policy during the writing and reviewing process. Copyright ISCA, CAINE 2014.


Saschanand C.,Sukhothai Thammathirat Open University
2015 4th International Symposium on Emerging Trends and Technologies in Libraries and Information Services, ETTLIS 2015 - Proceedings | Year: 2015

This research paper aimed at analyzing 1) the concept of information literacy in the 2008 Basic Education Core Curriculum of Thailand; 2) the teaching and learning of information literacy in basic education; and 3) the roles of teacher-librarians in the development of information literacy in basic education. Documentary research mainly the 2008 Basic Education Core Curriculum and related research works were used, supplemented by interviewing with key teacher-librarians. Data was analyzed using content analysis, and presented descriptively. The Findings showed that: • The term information literacy did not appear directly in the 2008 Basic Education Core Curriculum but the concept of information literacy skill has been integrated in the Curriculum under various related terms. • There has been an awareness of information literacy in Thailand especially at the educational environment. Information literacy has been taught in various ways, integration in the curriculum/ courses and taught by subject teachers or with teacher- librarians as partners especially in the teaching learning process to promote students' information literacy skills; a single subject as an elective or compulsory subject taught by teacher-librarians, or as part of extra-curricular activities and library orientation. • Teacher-librarians play major roles in the development of information literacy in basic education as instructors/ instructional partners, facilitators, collaborators and connectors. © 2015 IEEE.


Lertratanakehakarn P.,Sukhothai Thammathirat Open University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014

This paper is to study the digital preservation of palm-leaf manuscripts and the organizations that are responsible for creating, storing and digitizing palm-leaf manuscripts in Thailand. Palm-leaf manuscripts are the cultural heritage and wisdom records of the local ancestors. It appears to be cultural heritage of South East Asia. In Thailand, this kind of cultural heritage is found in many areas of the country. Palm-leaf manuscripts should be preserved in the digital form for both knowledge and the manuscripts themselves, for long term use throughout its lifecycle, for the purpose of education, preservation and research for future generations. This paper also suggests a digital preservation plan of Palm-leaf manuscripts to be easily accessed by researchers and scholars. © Springer International Publishing Switzerland 2014.


Yiengprugsawan V.,Australian National University | Somkotra T.,Chulalongkorn University | Seubsman S.-A.,Sukhothai Thammathirat Open University | Sleigh A.C.,Australian National University
Health and Quality of Life Outcomes | Year: 2011

Background: Oral health has been of interest in many low and middle income countries due to its impact on general health and quality of life. But there are very few population-based reports of adult Oral Health Related Quality of Life (OHRQoL) in developing countries. To address this knowledge gap for Thailand, we report oral health findings from a national cohort of 87,134 Thai adults aged between 15 and 87 years and residing all over the country.Methods: In 2005, a comprehensive health questionnaire was returned by distance learning cohort members recruited through Sukhothai Thammathirat Open University. OHRQoL dimensions included were discomfort speaking, swallowing, chewing, social interaction and pain. We calculated multivariate (adjusted) associations between OHRQoL outcomes, and sociodemographic, health behaviour and dental status.Results: Overall, discomfort chewing (15.8%), social interaction (12.5%), and pain (10.6%) were the most commonly reported problems. Females were worse off for chewing, social interaction and pain. Smokers had worse OHRQoL in all dimensions with Odds Ratios (OR) ranging from 1.32 to 1.51. Having less than 20 teeth was strongly associated with difficulty speaking (OR = 6.43), difficulty swallowing (OR = 6.27), and difficulty chewing (OR = 3.26).Conclusions: Self-reported adverse oral health correlates with individual function and quality of life. Outcomes are generally worse among females, the poor, smokers, drinkers and those who have less than 20 teeth. Further longitudinal study of the cohort analysed here will permit assessment of causal determinants of poor oral health and the efficacy of preventive programs in Thailand. © 2011 Yiengprugsawan et al; licensee BioMed Central Ltd.


Lim L.L.-Y.,Australian National University | Seubsman S.-A.,Sukhothai Thammathirat Open University | Sleigh A.,Australian National University | Bain C.,University of Queensland
Nutrition, Metabolism and Cardiovascular Diseases | Year: 2012

Background and aims: Waist circumference (WC), waist-to-hip ratio (WHR) and waist-to-stature ratio (WSR), being common proxy measures of abdominal obesity, are useful tools in epidemiologic studies, but little is known about their validity when the indices are derived from self-reported measurements. We determine and compare the validity of self-reported WC, WHR and WSR in order to identify the optimal index for use in epidemiologic surveys. Methods and Results: Technician- and self-reported measurements of height, waist and hip circumference were obtained from 613 Thai adults (mean age 35 years). Regarding technician-reported measurements as reference, diagnostic test properties were derived and performances of the indices compared using receiver-operator-characteristic curves and the area-under-the-curve (AUC) analyses. There was good agreement between technician- and self-reported measurements for WC and WSR (concordance correlation coefficients ranged from 0.84 to 0.90) but not for WHR (0.50 in men, 0.45 in women). The sensitivity and specificity of self-reported WC and self-reported WSR as measures of abdominal obesity were superior to those of self-reported WHR in both sexes. AUCs for WC and WSR were comparable (0.93 and 0.92, respectively, in men; 0.88 and 0.87 in women) and significantly higher than for WHR (0.80 in men; 0.76 in women; p<0.0001). Conclusion: WC and WSR derived from self-reported waist and height measurements are valid methods for determining abdominal obesity. Self-reported measurements should not be used to derive the WHR. In Asian populations, WSR may be the optimal index of abdominal obesity when measurements are derived from self-reports in epidemiologic surveys. © 2010 Elsevier B.V.


Yiengprugsawan V.,Australian National University | Carmichael G.A.,Australian National University | Lim L.L.-Y.,Australian National University | Seubsman S.,Sukhothai Thammathirat Open University | Sleigh A.C.,Australian National University
Health Policy and Planning | Year: 2011

Thailand implemented a Universal Coverage Scheme (UCS) of national health insurance in April 2001 to finance equitable access to health care. This paper compares inequalities in health service use before and after the UCS, and analyses the trend and determinants of inequality. The national Health and Welfare Surveys of 2001 and 2005 are used for this study. The concentration index for use of ambulatory care among the population reporting a recent illness is used as a measure of health inequality, decomposed into contributing demographic, socio-economic, geographic and health insurance determinants. As a result of the UCS, the uninsured group fell from 24% in 2001 to 3% in 2005 and health service patterns changed. Use of public primary health care facilities such as health centres became more concentrated among the poor, while use of provincial/general hospitals became more concentrated among the better-off. Decomposition analysis shows that the increasingly common use of health centres among the poor in 2005 was substantially associated with those with lower income, residence in the rural northeast and the introduction of the UCS. The increasing use of provincial/general hospitals and private clinics among the better-off in 2005 was substantially associated with the government and private employee insurance schemes. Although the UCS scheme has achieved its objective in increasing insurance coverage and utilization of primary health services, our findings point to the need for future policies to focus on the quality of this primary care and equitable referrals to secondary and tertiary health facilities when required. Published by Oxford University Press in association with The London School of Hygiene and Tropical Medicine © The Author 2010; all rights reserved.


Zhao J.,Australian National University | Seubsman S.-A.,Australian National University | Seubsman S.-A.,Sukhothai Thammathirat Open University | Sleigh A.,Australian National University
Journal of Epidemiology | Year: 2014

Background: Urban populations usually have higher levels of cardiovascular risk factors than rural populations in developing countries. However, association between cardiovascular risk factors and duration of urban dwelling, particularly for early stages of urban migrations, has not yet been adequately studied. We examined cardiovascular risks in relation to timing of urbanization in Thailand, paying attention to recent internal migrants. Methods: Our study base was a large national cohort (n = 87 151) of distance-learning Thai open university students recruited in 2005 and followed up in 2009. After exclusion of longitudinal dropouts and reverse migrants, 51 936 remained for analyses. The information collected included historical residence, urban migration and its lifecycle timing, self-reported doctor-diagnosed diseases, and socio-demographic and personal attributes that could influence health. To relate cardiovascular outcomes (prevalence and incidence of hypertension and hyperlipidaemia) and life-course urbanization status (ie at age 12, 4 years ago [2005] and at present [2009]), we applied logistic regression. Included in the models were 10 other covariates that could confound the urbanization effect. Results: Recent migration (arriving within four years) among young cohort members (born after 1980) was associated with higher risk of hypertension (OR 1.80 for prevalence and 1.68 for four-year incidence). Higher hyperlipidaemia prevalence (and incidence) was associated with any urban dwelling. Recent migrants quickly developed hyperlipidaemia, particularly the youngest (born after 1980) and oldest participants (born before 1960). Conclusions: Increased cardiovascular risks appear among rural-urban migrants within four years after they arrive. Given the scale of continuing urbanization, interventions are needed to support and educate recent migrants in Thai cities. © 2014 Jiaying Zhao et al.

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