SCOPUS 2010-2014

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SRL-GSM: A hybrid approach based on semantic role labeling and general statistic method for text summarization
(Asian Network for Scientific Information, 2010) L. Suanmali; N. Salim; M.S. Binwahlan
Sentence extraction techniques are commonly used to produce extraction summaries. The goal of text summarization based on extraction approach is to identify the most important set of sentences for the overall understanding of a given document. One of the methods to obtain suitable sentences is to assign some numerical measure of a sentence for summary called sentence weighting and then select the best ones. In this study, we propose Semantic Role Labeling (SRL) approach to improve the quality of the summary created by the general statistic method. We calculate a couple of sentence semantic similarity based on the similarity of the pair of words using WordNet thesaurus to discover the word relationship between sentences. We perform text summarization based on General Statistic Method (GSM) and then combine it with the SRL method. We compare our results with the baseline summarizer and Microsoft Word 2007 summarizers. The results show that SRL-GSM and GSM give the best average precision, recall and f-measure for creation of summaries. © 2010 AsianNetwork for Scientific Information.
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.
RASSF1A promoter hypermethylation as a prognostic marker for hepatocellular carcinoma
(Asian Pacific Organization for Cancer Prevention, 2010) Pensri Saelee; Sopit Wongkham; Sunanta Chariyalertsak; Songsak Petmitr; Ubol Chuensumran; P. Saelee; Research Division, National Cancer Institute, Bangkok, Thailand; email: saelee@health.moph.go.th
This study was performed to determine whether epigenetic aberrant methylation of RASSF1A might be associated with hepatocarcinogenesis. Methylation specific-PCR was performed to identify RASSF1A promoter hypermethylation in 29 tumors and corresponding normal liver tissues. In addition, RASSF1A mRNA levels were analyzed by quantitative real-time reverse transcription-PCR. Aberrant methylation of RASSF1A was detected in 25 of 29 cases (86%), with loss of RASSF1A expression evident in 8 of 22 cases (36%). No correlation between loss of RASSF1A mRNA and promoter hypermethylation of the RASSF1A gene was observed. There was a significant correlation between the methylation status of RASSF1A and hepatocellular carcinoma (HCC) patients who did not undergo chemotherapy (P = 0.03). Multivariate analysis, adjusted for tumor size, treatment, RASSF1A hypermethylation, and RASSF1A under-expression, showed RASSF1A hypermethylation to be assocaited with a better prognosis for HCC patients (HR= 0.089, 95%CI = 0.013-0.578; P = 0.012). Our findings showed that RASSF1A promoter hypermethylation occurs frequently, and may serve as a good prognostic factor.
Single electron-hole pair generation using dark-bright solitons conversion control
(2010) R. Jomtarak; C. Teeka; P.P. Yupapin; J. Ali; R. Jomtarak; Advanced Research Center for Photonics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: rangsan_jom@dusit.ac.th
Recently, the electron-hole pair generated in 1.06-_m separate-absorber-avalanche (multiplier) InP-based devices [1], SiGe/Si planar waveguides [2] fabricated with a Ge concentration ranging from 2% to 6% and different thicknesses ranging from 200 nm to 2 _m, generating electron-hole pairs with a 100 fs laser pulse emitted at 810 nm, and monitoring the free-carrier absorption transient with a c.w. probe beam at 1.55 _m, bipolar transistors [3], CMOS process [4], InAs-GaSb superlattice (SL) photodiodes [5], resonant microcavity [6], A cavity-QED using a single InAs quantum dot and a high-Q whispering gallery mode [7]. ©2010 IEEE.
Managerial ownership and firm performance in Thailand: An empirical analysis
(Virtus Interpress, 2010) Wanachan Singhchawla; Robert T. Evans; John Evans
This study investigates whether managerial share ownership serves to enhance or detract from firm performance in listed companies in Thailand. The convergence-of-interest hypothesis asserts that firm value increases as management ownership rises. On the other hand, when managers own a substantial fraction of the firm shares, then voting power or other influence may satisfy other non-value- maximizing objectives without endangering other positions. This gives rise to the entrenchment hypothesis, which suggests that excessive insider ownership has a negative impact on corporate performance. The results of this study support both the alignment and entrenchment efforts and therefore the existence of a non-linear relationship between firm performance and managerial ownership. Firm size and industry are also shown to impact significantly on firm performance in Thailand.
Index financial time series based on zigzag-perceptually important points
(2010) Chawalsak Phetchanchai; Ali Selamat; Amjad Rehman; Tanzila Saba
Problem statement: Financial time series were usually large in size, unstructured and of high dimensionality. Since, the illustration of financial time series shape was typically characterized by a few number of important points. These important points moved in zigzag directions which could form technical patterns. However, these important points exhibited in different resolutions and difficult to determine. Approach: In this study, we proposed novel methods of financial time series indexing by considering their zigzag movement. The methods consist of two major algorithms: first, the identification of important points, namely the Zigzag-Perceptually Important Points (ZIPs) identification method and next, the indexing method namely Zigzag based M-ary Tree (ZM-Tree) to structure and organize the important points. Results: The errors of the tree building and retrieving compared to the original time series increased when the important points increased. The dimensionality reduction using ZM-Tree based on tree pruning and number of retrieved points techniques performed better when the number of important points increased. Conclusion: Our proposed techniques illustrated mostly acceptable performance in tree operations and dimensionality reduction comparing to existing similar technique like Specialize Binary Tree (SB-Tree). © 2010 Science Publications.
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.
Hybrid web page prediction model for predicting a user's next access
(Asian Network for Scientific Information, 2010) S. Chimphlee; N. Salim; M.S.B. Ngadiman; W. Chimphlee
The web user sessions are clustered with incorporating the sequence of web page visits. A sequence-based clustering is developed by proposing new sequence representations and new similarity measures. The resulting sequence representation allows for calculation of similarity between web user sessions and then, can be used as input of clustering algorithms. This study proposed a hybrid prediction model (HyMFM) that integrates Markov model, Association rules and Fuzzy Adaptive Resonance Theory (Fuzzy ART) clustering together. The three approaches are integrated to maximize their strengths. A series of experiments was conducted to investigate whether, clustering performance is affected by different sequence representations and different similarity measures. This model could provide better prediction than using each approach individually. © 2010 Asian Network for Scientific Information.
Fuzzy swarm diversity hybrid model for text summarization
(2010) Mohammed Salem Binwahlan; Naomie Salim; Ladda Suanmali; M. S. Binwahlan; Faculty of Applied Sciences, Hadhramout University of Science and Technology, Yemen, 81310 Skudai, Johor, Malaysia; email: moham2007med@yahoo.com
High quality summary is the target and challenge for any automatic text summarization. In this paper, we introduce a different hybrid model for automatic text summarization problem. We exploit strengths of different techniques in building our model: we use diversity-based method to filter similar sentences and select the most diverse ones, differentiate between the more important and less important features using the swarm-based method and use fuzzy logic to make the risks, uncertainty, ambiguity and imprecise values of the text features weights flexibly tolerated. The diversity-based method focuses to reduce redundancy problems and the other two techniques concentrate on the scoring mechanism of the sentences. We presented the proposed model in two forms. In the first form of the model, diversity measures dominate the behavior of the model. In the second form, the diversity constraint is no longer imposed on the model behavior. That means the diversity-based method works same as fuzzy swarm-based method. The results showed that the proposed model in the second form performs better than the first form, the swarm model, the fuzzy swarm method and the benchmark methods. Over results show that combination of diversity measures, swarm techniques and fuzzy logic can generate good summary containing the most important parts in the document. © 2010 Elsevier Ltd. All rights reserved.
The development of cross-language plagiarism detection tool utilising fuzzy swarm-based summarisation
(2010) Salha Alzahrani; Naomie Salim; Chow Kok Kent; Mohammed Salem Binwahlan; Ladda Suanmali; S. Alzahrani; Faculty of CS and Info. Sys., Taif University, Taif, Saudi Arabia; email: s.zahrani@tu.edu.sa
This work presents the design and development of a web-based system that supports cross-language similarity analysis and plagiarism detection. A suspicious document dq in a language Lq is to be submitted to the system via a PHP web-based interface. The system will accept the text through either uploading or pasting it directly to a text-area. In order to lighten large texts and provide an ideal set of queries, we introduce the idea of query document reduction via summarisation. Our proposed system utilised a fuzzy swarm-based summarisation tool originally built in Java. Then, the summary is used as a query to find similar web resources in languages Lx other than Lq via a dictionary-based translation. Thereafter, a detailed similarity analysis across the languages Lq and L xis performed and friendly report of results is produced. Such report has global similarity score on the whole document, which assures high flexibility of utilisation. © 2010 IEEE.
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.
Meta-analysis and sensitivity analysis for multi-arm trials with selection bias
(2011) Hathaikan Chootrakool; Jian Qing Shi; Rongxian Yue; J.Q. Shi; School of Mathematics and Statistics, University of Newcastle, Newcastle NE1 7RU, United Kingdom; email: j.q.shi@ncl.ac.uk
Multi-arm trials meta-analysis is a methodology used in combining evidence based on a synthesis of different types of comparisons from all possible similar studies and to draw inferences about the effectiveness of multiple compared-treatments. Studies with statistically significant results are potentially more likely to be submitted and selected than studies with non-significant results; this leads to false-positive results. In meta-analysis, combining only the identified selected studies uncritically may lead to an incorrect, usually over-optimistic conclusion. This problem is known asbiselection bias. In this paper, we first define a random-effect meta-analysis model for multi-arm trials by allowing for heterogeneity among studies. This general model is based on a normal approximation for empirical log-odds ratio. We then address the problem of publication bias by using a sensitivity analysis and by defining a selection model to the available data of a meta-analysis. This method allows for different amounts of selection bias and helps to investigate how sensitive the main interest parameter is when compared with the estimates of the standard model. Throughout the paper, we use binary data from Antiplatelet therapy in maintaining vascular patency of patients to illustrate the methods. © 2011 John Wiley & Sons, Ltd.
Single electron-hole pair generation using dark-bright solitons conversion control
(2011) R. Jomtarak; C. Teeka; P.P. Yupapin; J. Ali; R. Jomtarak; Advanced Research Center for Photonics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: rangsan_jom@dusit.ac.th
In this paper, we present the new concept of single electron-hole pair generation by using dark-bright solitons conversion control based on microring resonator coupled to one arm MZI. By using some suitable parameters and found that the single electron-hole pair are seen, therefore, the single electron-hole pair generate can be storage and controll within the design system. © 2011 American Institute of Physics.
Development of a Community-based Pre-hospital Care Management Model for Emergency Volunteers
(2011) Taweewun Chaleekrua; Supavan Phlainoi; Pragai Jirojanakul; Adisak Plitponkarnpim
Using Community Action Research (CAR), this study constructed a model for community-based pre- hospital care management for emergency volunteers (EVs). The study was conducted in three phases: exploration of the community context including a needs assessment; capacity building and evaluation of the management of EVs; and evaluation of the previous two phases. There were 126 participants in the study who provided data through group interviews, in-depth interviews, workshops, forums and from lessons learned. Data analysis was conducted by content analysis, free-list analysis, concurrent analysis, and mean difference methods. Findings were as follows: (1) people in a remote rural community practiced reciprocity in pre-hospital care within a hybrid of functional and interpretive management paradigms and in doing so took the major responsibility to organize and manage a system to respond to emergencies that includes informal organization, flexible rules, communications, and budgeting, but with some support from government; (2) the management of emergency volunteers was within a Hybrid model composed of the functional and interpretive paradigms and this affected recruitment and retention of emergency volunteers; and (3) evaluation of emergency volunteers depended on the paradigm with evaluation in the functional paradigm depending on a quantitative approach but in the interpretive approach it depended on qualitative methods. Results also showed that the Hybrid model was effective for managing emergency volunteers, and built self-confidence among the participants. This model can be used in similar remote rural areas with policy to be formulated for the management of emergency volunteers.
Technology of Dv_ravat_ pottery: A view from petrographic analysis
(Indo-Pacific Prehistory Association, 2011) Duangkamol Aussavamas; D. Aussavamas; Rajabhat Suan Dusit University, Bangkok, Thailand; email: aussa@hotmail.com
This study focuses on the examination of aspects of the carinated pottery of the Dv_ravat_ period. This type of pottery is one of the most prominent types found in a large number of Dv_ravat_ sites in Thailand. Samples used for this study were collected from excavations at archaeological sites located in several regions of Thailand, including Northern, Northeastern and Central Thailand. The carinated potteries were analyzed using petrographic analysis. The objective of this work was to examine the pottery fabric. This method is used to establish sources of raw materials and whether production techniques, decorations, and firing temperature show patterns associated with the raw material source distributions. It is also possible to reconstruct the production technology of the vessels. Knowing the source of raw materials source of clay and temper and understanding the patterns of manufacturing and decorative processes help us better understand material distribution patterns of the Dv_ravat_ period. Analysis shows that Dv_ravat_ earthenware pottery raw materials include both primary and secondary clays, and that temper used was both organic matter (rice chaff) and grogs (fired clay mixed with iron oxide). Evidence for wheel-thrown production was associated with all decoration styles, and finishing techniques included plain, polishing, incising, cord marking, red slip and black burnishing. The firing temperatures were as low as 400-550¡ C. These samples indicate there was general homogeneity over a wide area, but also the presence of regional groups of pottery. This suggests the widespread circulation of pottery styles among various production centers during the Dv_ravat_ period.
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.
Spin-polarization array generation for spin transport use
(2011) S. Mitatha; W. Sangiamsak; K. Kulsirirat; C. Teeka; P.P. Yupapin
Spin-polarization can be formed by the two components of soliton (electromagnetic wave) within the metallic waveguide. Under the resonant condition, the random transverse electric and magnetic fields of the solitons corresponding to the left-hand and right hand photons can be generated. Whenever a photon is absorbed by an object, an angular momentum of either +_ or -_ is imparted to the object, in which two possible spin states known as optoelectronic spins are exhibited. Furthermore, the array of optoelectronic spins, i.e., many particles can be generated and controlled by using the modified add-drop filter, in which the broad spectrum soliton can be generated and used to form large scale spin transport applications. © 2011 World Scientific Publishing Company.
Single electron-hole pair generation using dark-bright solitons conversion control
(2011) S. Punthawanunt; R. Jomtarak; C. Teeka; P.P. Yupapin; J. Ali; S. Punthawanunt; Faculty of Science and Technology, Kasem Bundit University, Bangkok 10250, Thailand; email: suphanchai@kbu.ac.th
In this paper, we present the new concept of single electron-hole pair generation by using dark-bright solitons conversion control based on microring resonator coupled to one arm MZI. By using some suitable parameters and found that the single electron-hole pair are seen, therefore, the single electron-hole pair generate can be storage and controll within the design system.
Using "activated carbon from bagasse" for color removal
(Nova Science Publishers, Inc., 2011) Paitip Thiravetyan; Parinda Suksabye; P. Thiravetyan; Division of Biotechnology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Thakham, Bangkhuntien, Bangkok, Thailand; email: paitip.thi@kmutt.ac.th
[No abstract available]
Phosphoproteomic analysis of apoptotic hematopoietic stem cells from hemoglobin E/_-thalassemia
(2011) Saranyoo Ponnikorn; Tasanee Panichakul; Kitima Sresanga; Chokdee Wongborisuth; Sittiruk Roytrakul; Suradej Hongeng; Sumalee Tungpradabkul; S. Hongeng; Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand; email: rashe@mahidol.ac.th
Background: Hemoglobin E/_-thalassemia is particularly common in Southeast Asia and has variable symptoms ranging from mild to severe anemia. Previous investigations demonstrated the remarkable symptoms of _-thalassemia in terms of the acceleration of apoptotic cell death. Ineffective erythropoiesis has been studied in human hematopoietic stem cells, however the distinct apoptotic mechanism was unclear.Methods: The phosphoproteome of bone marrow HSCs/CD34+ cells from HbE/_-thalassemic patients was analyzed using IMAC phosphoprotein isolation followed by LC-MS/MS detection. Decyder MS software was used to quantitate differentially expressed proteins in 3 patients and 2 normal donors. The differentially expressed proteins from HSCs/CD34+ cells were compared with HbE/_-thalassemia and normal HSCs.Results: A significant change in abundance of 229 phosphoproteins was demonstrated. Importantly, the analysis of the candidate proteins revealed a high abundance of proteins that are commonly found in apoptotic cells including cytochrome C, caspase 6 and apoptosis inducing factors. Moreover, in the HSCs patients a significant increase was observed in a specific type of phosphoserine/threonine binding protein, which is known to act as an important signal mediator for the regulation of cell survival and apoptosis in HbE/_-thalassemia.Conclusions: Our study used a novel method to investigate proteins that influence a particular pathway in a given disease or physiological condition. Ultimately, phosphoproteome profiling in HbE/_-thalassemic stem cells is an effective method to further investigate the cell death mechanism of ineffective erythropoiesis in _-thalassemia. Our report provides a comprehensive phosphoproteome, an important resource for the study of ineffective erythropoiesis and developing therapies for HbE/_-thalassemia. © 2011 Ponnikorn et al; licensee BioMed Central Ltd.

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