Now showing items 1-20 of 2724

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    A framework for implementation of Thai to English machine translation systems 

    Tawee Chimsuk; Surapong Auwatanamongkol (National Institute of Development Administration, 2010)

    Machine translation (MT) is a sub-field of computational linguistics that investigates the use of computer software to translate text or speech from one language to another. It can help people to communicate with others with different natural languages. Machine Translation (MT) between Thai and English languages bas been an ongoing and challenging research topic. Most research has been done on English to Thai machine translation. but not the other way around. Developing a machine translation system which can correctly translate any sentence ...
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    An automatic text summarization approach using content-based and graph-based characteristics 

    Kornnika Gree-ut; Ohm Sornil, advisor (National Institute of Development Administration, 2006)
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    A lossless image compression algorithm using predictive coding based on quantized colors 

    Fuangfar Pensiri; Surapong Auwatanamongkol, advisor (National Institute of Development Administration, 2011)

    Predictive coding has proven to be effective for lossless image compression. The predictive coding estimates true color of a pixel based on the true colors of its neighboring pixels. To enhance the accuracy of the estimation, we propose a new and simple predictive coding algorithm that uses the quantized colors of neighboring pixels to estimate the true color of a pixel. The estimation is based on the majority of quantized colors of the three neighboring pixels. Experiments, over a set of true color 24-bit images whose colors of pixels are quantized ...
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    An efficient authenticated group key agreement on tree-based braid groups in mobile AD HOC networks 

    Thanongsak Aneksrup; Pipat Hiranvanichakorn, advisor (National Institute of Development Administration, 2010)
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    Integrated secure multipath mobile ad hoc network 

    Supachote Lertvorratham; Pipat Hiranvanichakorn, advisor (National Institute of Development Administration, 2010)

    The dramatic growth of wireless communication technology today makes wireless equipment affordable and widely used. In a situation where a temporary wireless network needs to be established but fixed-base station is not available, a mobile ad hoc network can be implemented. For implementing a mobile ad hoc network, I realize that there are some challenges. Firstly, most of mobile ad hoc network routings rely on establishment of minimum hops route. I argue in this case that there can be some other metrics, which can be used to establish a better ...
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    Grid-based supervised clustering algorithm using greedy and gradient descent methods to build clusters 

    Pornpimol Bungkomkhun; Surapong Auwatanamongkol, advisor (National Institute of Development Administration, 2012)

    Clustering analysis is one of the primary methods of data mining tasks with the objective to understand the natural grouping (or structure) of data objects in a dataset. The clustering tasks aim to segment the entire data set into relatively homogenous subgroups or clusters where the similarities of the data objects within clusters are maximized and the similarities of data objects belonging to different clusters are minimized. For supervised clustering, not only attribute variables of data objects but also the class variable of data objects take ...
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    Supervised growing neural gas algorithm in clustering analysis 

    Apirak Jirayusakul; Surapong Auwatanamongkol, advisor (National Institute of Development Administration, 2007)
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    Materialized views selection using two-phase optimization algorithm 

    Jiratta Phuboon-ob; Raweewan Auepanwiriyakul, advisor (National Institute of Development Administration, 2009)

    A data warehouse (DW) can be defined as a subject-oriented, integrated, nonvolatile and time-variant collection of data, which has value and role for decisionmaking by querying. Queries to DW are critical regarding to their complexity and length. They often access millions of tuples, and involve joins between relations and aggregations. To avoid accessing base tables and increase the speed of queries posed to a DW, we can use some intermediate results from the query processing stored in the DW called materialized views. However, these views have ...
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    Inversion of web service invocation using publish/subscribe push-based architecture 

    Thanisa Numnonda; Rattakorn Poonsuph, advisor (National Institute of Development Administration, 2012)

    Among enterprise application integration solutions, Web Service is a promising technology to achieve the interoperability in heterogeneous environments. However, traditional Web Service invocation may lead to unnecessary network traffic, long response time, and bottleneck problems at service providers. While a publish/subscribe model provides an advantage of prompt notification which can eliminate unnecessary network traffic, its achievement in interoperability is still limited. By integrating Web Service technologies with a publish/subscribe ...
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    Texture classification using an invariant texture representation and a tree matching kernel 

    Somkid Soottitantawat; Surapong Auwatanamongkol, advisor (National Institute of Development Administration, 2010)

    The real world is rich in many textures, which can be regarded as the visual appearance of surfaces. They may be perceived as being smooth or rough, coarse or fine, homogeneous or non-homogeneous, etc. Moreover, textures within real images vary in scale, rotation and illumination. Several researchers have proposed texture analysis methods to describe textures in many applications, such as computer vision, pattern recognition, image retrieval, scene image analysis, and so on. Although the analysis of texture properties has attracted the ...
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    A multilevel analysis of determinants of infant mortality in rural Northeastern Thailand 

    Nawarat Suwannapong; Suwanlee Piampiti, advisor (National Institute of Development Administration, 1987)

    The study utilized field survey data conducted from January 1986 to March 1986. Married women aged 15 to 49 years with experience of at least one live birth were randomly interviewed in depth. Only live births during the period January 1, 1980 to December 31, 1984 were analysed. For a better understanding of the infant mortality situation in Thailand, the author begins with the estimate of regional probability of dying between live birth and selected age by applying the indirect technique developed by Brass, Trussell and Feeney. The data for ...
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    Local feature representations for facial expression recognition based on differences of gray color values of neighboring pixels 

    Mohammad Shahidul Islam; Surapong Auwatanamongkol, advisor (National Institute of Development Administration, 2013)
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    A study of changes in urbanization and occupational mobility of the Thai labour force 

    Chupensri Wongbuddha; Suchart Prasith-rathsint, advisor (National Institute of Development Administration, 1988)

    This study examines changes in the degree of urbanization in various types of a community and an individual's mobility in the three major occupational groups, agriculture, industry and service. Information was obtained from two levels, 1) a community level: a total of 503 communities was sampled from the 1970 and 1980 data tapes of Population and Housing Censuses, and 2) a personal level: a total of 720 households was sampled including 1,294 individuals of 35 years and over, selected for the survey and interviewed concerning their individual ...
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    Thai rhetorical structure analysis 

    Somnuk Sinthupoun; Ohm Sornil, advisor (National Institute of Development Administration, 2009)

    Rhetorical Structure Analysis (RSA) explores Discourse Relations (DRs) among related Elementary Discourse Units (EDUs) in a Rhetorical Structure Tree (RS tree) to describe meaning in a text. It is very useful in many text processing tasks employing relationships among EDUs to use an input such as text understanding, summarization, discourse parsing, machine translation and question answering. The Thai language, with its distinctive linguistic characteristics, requires a unique technique. Thai linguistic characteristics have no explicit EDU ...
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    An assessment of rural resettlement program in Thailand : a case study of large hydropower dam resettlements 

    Montri Suwanmontri; Kowit Kangsanan, advisor; Duanpen Theerawanviwat, advisor (National Institute of Development Administration, 1996)

    The main objective of this research was to establish a prescriptive model for future resettlement design. The assessment methodology contains bivariate and multivariate analyses that include at least two groups of cross-sectional data; before and after resettlement. This data was obtained from household surveys of experimental groups at the Sirindhorn, Khao Laem, Bang Lang, and Rajjaprabha resettlements. Some villages located near to the resettlement projects were surveyed as control groups for comparison purposes. / Results of the assessment and ...
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    Alternative types of care and their impacts on the quality of the Thai elderly in the Bangkok Metropolitan Area 

    Sasithorn Tamarak; Somboonwan Satyarakwit, advisor (National Institute of Development Administration, 1996)

    In order to deal with an aging population increasing rapidly in numbers and proportion, a study into present care provisions, existing needs, an the quality of life of the Thai elderly is needed. Two research methods are employed: documentary research and survey research. Documentary research into the demographic profile of the Thai elderly is presented by obtaining data from the National Statistical Office which focuses on the transition of population structure and socioeconomic characteristics of the aging population. A decline in the proportion ...
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    A study on employment and fertility of female migrant workers in the manufacturing industry of Bangkok and periphery areas 

    Kusol Soonthorndhada; Suwanlee Piampiti, chairperson (National Institute of Development Administration, 1991)

    The main objectives of this study were two fold. First, to study the general characteristics background in terms of socio-economic, demographic, employment and migration background of female workers in the manufacturing industry. Secondly, to assess the determinants of female workers' fertility and to examine the effect of fertility on employment. The data used in this study were selected ever married female workers from the survey of "Family Planning and Welfare Services for Female Workers in the Manufacturing Industry" conducted by Mahidol ...
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    Accessibility to social security scheme of informal labors in Bangkok 

    Nirund Thiptananont; Pachitjanut Siripanich, advisor (National Institute of Development Administration, 2010)

    The purpose of this study was to examine the knowledge, satisfaction, acquisition of information, relative advantages, complexities, trustworthiness and effort of the government, among informal labour in Bangkok towards the social security scheme and also to study the relationship between these factors and participation in the social security scheme. The approach was survey research. The target population was labour having income but no social security at the age of 15-60 years. The sampling method was two-stage stratified sampling, ...
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    An evaluation of secondary school anti-narcotic programs in Bangkok metropolis 

    Surasak Laohapiboolkul; Kanikar Sookasame, advisor (National Institute of Development Administration, 2006)
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    An assessment of the quality of life of the Thai elderly : a study of the uses of multi-dimensional indexes 

    Chanin Chareonkul; Anek Hirunraks, advisor (National Institute of Development Administration, 1993)

    The proportion and numbers of the population aged 60 years and above in the overall population structure of Thailand are increasing in the midst of rapid socio-economic and cultural changes. These changes inevitably affect the well-being of the Thai elderly. This study aimed to indentify significant domains of quality of life and the constituent factors that are appropriate for the elderly people in the Thai context. It was expected that this study would contribute to an increased awareness of the existing and potential needs of this segment of ...