cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2006.1872
title: A development of community-based English course to enhance English language skills and local cultural knowledge for undergraduate students

description: This thesis proposes the development of a community-based approach to teaching English and demonstrates the value of utilizing authentic community resources to enhance English language skills and local cultural knowledge. the objectives of this study were to: 1) develop an English course using a community-based approach; 2) investigate learners' English laguage skills through a community-based approach; 3) investigate whether the community-based approach can enhance local cultural knowledge; and 4) evaluate the effectiveness of an English course using a community-based approach. Nineteen undergraduates, who majored in English at the Faculty of Education, Rajabhat Rajanagarindra University, were chosen as the sample group. The study was a single group design using qualitative and quantitative methods. It took 16 weeks for data collection. The findings revealed that: 1) data derived from needs analysis and perceived as important were proved to be necessary for designing the community-based English course; 2) the scores from posttest were higher than the pretest scores because the relationships between contextual factors, individual learner differences, learning opportunities led to the development of learners' English language skills; 3) using local cultural materials as learning activities and experiences was found to be beneficial to enhance learners' local cultural knowledge; and 4) the course was found effective because the participants could achieve the learning goals in terms of Taxonomy of Significant Learning (foundational knowledge, application, integration, human dimension, caring, and learning how to learn). Learners perceived their English language skills had improved after taking the course. The study indicated that a community-based English course focused on both academic concerns and social issues. It is recommended that future research should extend to investigate a broader sample of students whose majors are English and non-English to gain better understanding of the process of second language learning.
DOI: 10.14457/cu.the.2006.1873
title: Effects of oil from Zingiber Cassumunar Roxb. on vascular tone of isolated rat aorta

description: Plai (Zingiber cassumunar Roxb.) is one of Thai herbal plants, which is well recognized for relieving muscle pain. In this study, the effects of plai oil on the contraction and relaxation of vascular smooth muscle in the endothelium-intact and endothelium-denuded rat aorta were investigated. The thoracic aorta was isolated from male Wistar rats (250-300 g), and the vascular tensions were measured isometrically. The results showed that plai oil (50 – 200 [micro]g/ml) significantly inhibited the PE- and KCI-induced contraction of endothelium-denuded aorta in concentration-dependent manner, but had no effects in endothelium-intact aorta. In addition, plai oil (40 and 100 [micro]g/ml) significantly inhibited the PE-induced contraction in Ca[superscript2+]-free condition, but not the caffeine-induced contraction. Furthermore, plai oil (50 and 100 [micro]g/ml) suppressed CaCl[subscript2] – induced contraction in high K[superscript+] – depolarizing solution with the apparent pD2 values of 3.76 +- 0.09 and 3.57 +- 1.35, respectively. The results also demonstrated that plai oil caused vasodilatation in endothelium-intact aorta with the apparent EC 50 values of 32.80 +- 4.43 [micro]g/m. Various compounds including methylene blue (10 [micro]M), L-NAME (10 [micro]M), glibenclamide (10 [micro]M), indomethacin (10 [micro]M), atropine (1 [micro]M), propranolol (10 [micro]M), and tetraethylammonium chloride (10 [micro]M) significantly inhibited the relaxant effect of plai oil. In conclusion, plai oil modulated the vascular tone via endothelium-dependent and endothlium-independent pathways. The direct actions on smooth muscle were possibly linked to non-specific inhibition of Ca[superscript2+] influx as well as inhibition of PE-mediated Ca[superscript2+] release from sarcoplamic reticulum. Moreover, plai oil may influences the vascular contractility through endothelium factors including NO-cGMP pathway, hyperpolarizing, cyclooxygenase, muscarinic receptors and [beta]-adrenoceptor.
DOI: 10.14457/cu.the.2006.1874
title: A development of artificial neural network for the rapid assessment of subsurface contamination

description: Contaminant transport in groundwater is a major environmental concern in many countries. It is desirable for users and regulatory agencies to have a reliable and convenient screening method to estimate the contaminant migration. Such a tool must allow users to identify critical sites and prioritize the clean-up and further investigative efforts. This study has investigated the feasibility of using an artificial neural network (ANN) as a quick predictor. A feedforward backpropagation neural network (FBNN) was used to train a data set simulated from the Visual MODFLOW program. The data set contained spatial and temporal variations of concentrations of one contaminant and the specified groundwater model parameters including hydraulic conductivity, longitudinal dispersivity, constant head difference, and recharge rate at the source of contamination under several hypothetical conditions. 1- and 2-hidden-layer FBNNs with various numbers of neurons were trained. Levenberg-Marquardt optimization with Bayesian regularization was found to be the best training algorithm for this training data set because of its capability of easing overfitting problem and improving generalization of the network. Data preprocessing prior training the network is also a crucial step for improving accuracy of prediction. The network with 2 hidden layers showed more accurate prediction than that with 1 hidden layer as indicated by the lower mean square error of the validation data set. The result indicates that this tool can be used to predict the concentration of contaminant as a function of time for given locations and model parameters.
DOI: 10.14457/cu.the.2006.1875
title: An intelligent system to recommend appropriate correlations for vertical multiphase flow

description: Artificial neural networks were used to identify appropriate correlations based on given levels of accuracy of bottomhole pressure calculation as well as the most accurate computation of the bottomhole pressure under given wellbore, fluid, and flowing conditions. Neural networks have ability to discriminate relationships between input of flow conditions and output of candidate correlations of vertical multiphase flow by learning from real samples. Therefore, neural networks were trained with training and validating data sets. After training several neural networks in several scenarios, two neural networks were chosen to provide prediction of acceptable and best multiphase flow correlation. In the first scenario, the best neural network that can predict correlations that yield an error between actual pressure measurement and computed pressure less than 10% was chosen. The chosen network yields 17.23% difference between the actual coded outputs and predicted coded outputs (The output is coded as 1 for correlation that has less than 10% error and 0 otherwise). In the second scenario, the best neural network that can predict the errors close to the actual errors was selected. The chosen neural network yields 7.84% average absolute difference between actual and predicted errors.
DOI: 10.14457/cu.the.2006.1876
title: ผลของการให้ข้อมูลและการปฎิบัติโยคะต่อความเครียดของผู้ดูแลในครอบครัวผู้ป่วยบาดเจ็บสมอง

description: การวิจัยครั้งนี้เป็นการวิจัยกึ่งทดลองมีวัตถุประสงค์ เพื่อเปรียบเทียบผลของการให้ข้อมูลและการปฏิบัติโยคะต่อความเครียดของผู้ดูแลในครอบครัวผู้ป่วยบาดเจ็บสมอง ระหว่างกลุ่มที่ได้รับการให้ข้อมูลและการปฏิบัติโยคะกับกลุ่มที่ได้รับการพยาบาลตามปกติ กลุ่มตัวอย่าง คือ ผู้ดูแลผู้ป่วยบาดเจ็บสมองที่เข้ารับการรักษาในหอผู้ป่วยศัลยกรรม โรงพยาบาลสมเด็จพระปิ่นเกล้า ตั้งแต่วันที่ 30 มกราคม 2550-28 มีนาคม 2550 จำนวน 40 คน และจับคู่ตามเกณฑ์ที่กำหนด แล้วสุ่มเป็นกลุ่มควบคุม 20 คน กลุ่มทดลอง 20 คน กลุ่มควบคุมได้รับการพยาบาลตามปกติ ในขณะที่กลุ่มทดลองได้รับการพยาบาลตามปกติร่วมกับการให้ข้อมูลและการปฏิบัติโยคะ เครื่องมือที่ใช้ในการวิจัย คือ โปรแกรมการให้ข้อมูลและการปฏิบัติโยคะ สำหรับผู้ดูแลผู้ป่วยบาดเจ็บสมองที่พัฒนาขึ้น จากการทบทวนวรรณกรรมเกี่ยวกับการให้ข้อมูลและแนวคิดโยคะ ที่สร้างขึ้นตามศาสตร์ของโยคะ จากสถาบันไกลวัลยธรรม ประกอบด้วย 1. การให้ข้อมูล 2. การปฏิบัติโยคะ ประกอบด้วย การหายใจ การปฏิบัติอาสนะ การผ่อนคลาย การฝึกสมาธิ และการฝึกความคิดด้านบวก ซึ่งได้ผ่านการตรวจสอบความเหมาะสมของการจัดกิจกรรม และตรงตามเนื้อหาจากผู้ทรงคุณวุฒิ จำนวน 5 ท่าน เครื่องมือที่ใช้ในการเก็บรวบรวมข้อมูลประกอบด้วย แบบบันทึกข้อมูลส่วนบุคคลของผู้ป่วยและผู้ดูแลผู้ป่วยบาดเจ็บสมอง แบบประเมินและวิเคราะห์ความเครียดด้วยตนเองสำหรับประชาชนไทย ของกรมสุขภาพจิต ผ่านการตรวจสอบความตรงตามเนื้อหาจากผู้ทรงคุณวุฒิ และหาค่าความเที่ยงสัมประสิทธิ์อัลฟาครอนบาค เท่ากับ .83 สถิติที่ใช้ในการวิเคราะห์ข้อมูล คือ ค่าเฉลี่ยเลขคณิต ค่าร้อยละ ส่วนเบี่ยงเบนมาตรฐาน สถิติ Kolmogorov-Smirnov test และสถิติการทดสอบที (Paired t-test และ Independent t-test) ผลการวิจัยสรุปได้ดังนี้ 1. ความเครียดของผู้ดูแลผู้ป่วยบาดเจ็บสมองหลังได้รับการให้ข้อมูลและการปฏิบัติโยคะน้อยกว่าก่อนได้รับการให้ข้อมูลและการปฏิบัติโยคะอย่างมีนัยสำคัญทางสถิติที่ระดับ .05 2. ความเครียดของผู้ดูแลผู้ป่วยบาดเจ็บสมองกลุ่มที่ได้รับการให้ข้อมูลและการปฏิบัติโยคะน้อยกว่ากลุ่มที่ได้รับการพยาบาลตามปกติอย่างมีนัยสำคัญทางสถิติที่ระดับ .05
DOI: 10.14457/cu.the.2006.1877
title: Phenol removal from wastewater using a phase separation of cationic-anionic surfactant mixture solution in continuous mixer-settler

description: Some cationic-anionic surfactant mixtures can spontaneously separate into two phases called aqueous surfactant two-phase system (ASTP). The separated phases are the micellar-rich phase and micellar-dilute phase. The organic compound present in the solution tend to solubilize and concentrate in the rich phase. The system is utilized as separation technique to remove phenol from wastewater in a continuous vessel at ambient temperature. Two moles of dodecyltrimethylammonium bromide (DTAB) and one mole of alkyldiphenyloxide disulfonate (ADPODS or trade name in DOWFAX 8390) were mixed and used as extracting agent. The mixer-settler was used as the continuous extractor in this study because it yields high throughput with less complication in term of vessel design and operation. The effects of degree of mixing in the mixer (via agitator speed), surfactant solution to wastewater flow rate ratio, and the number of settlers were investigated. The concentration of phenol in the effluence dilute phase decreases with increasing agitator speed, surfactant solution to wastewater flow rate ratio and number of settlers. It was found that the percentage of phenol removal achieved from this continuous extractor was approximately 74 % which was higher than that observed in a single stage, batch extraction at equilibrium condition at the same initial conditions. The optimal operation condition was 700 rpm of agitator speed, 81.9 mM of total surfactant concentration obtained by 0.12 surfactant to wastewater flow ratio and three settlers. Moreover, the higher degree of hydrophobicity of contaminant showed the greater potential of contaminant to be extracted in the surfactant-rich phase in the following order: 4-chlorophenol &gt; 2-chlorphenol &gt; phenol.
DOI: 10.14457/cu.the.2006.1878
title: How Thaksin and Thai Rak Thai party re-ignited the violence in the Thai South

description: Southern Thailand has longed resisted the rule of central Siamese Kings and then governments. The Kingdom of Pattani, established as a Malay-Muslim kingdom in the late 14th century was both prosperous and known to the western world as a trading post of some repute. For centuries, the Malay-Muslims prospered and evolved a culture and traditions which were separate from those of their Siamese neighbours to the north. Various Kings of Siam attempted to subjugate the Kingdom but to no avail. It took the treachery of Nai Chanthong one of the Chiefs of the Sultan to bring the kingdom to the Siamese King Rama I and it lost both its independence and its monarchy. In 1909, after the British portioning of Kedah and the sultanate of Patani was granted to Bangkok to rule. As a part of the post-colonial wave of nationalism that swept Southeast Asia in the middle part of the twentieth century, the Malay-Muslim community suffered the indignity of having many of its symbols of its culture and way of life–such as dress, language and names–relegated to a minority status, banned as they were in government institutions. As a result of this state led this perceived internal colonialism many Malay-Muslims took up arms against the central Thai governments, aided by the Communist movement of the time. This armed separatist struggle, however, was waged only by a minority of the Malay-Muslims, the majority continuing to live peacefully with their Chinese and Thai Buddhist neighbours. From the 1980’s onwards, the spread of democracy and civil society rather took away the radical elements of the south and the separatist movement became quiet until 2004 When a raid on an army camp and a pitch battle at the symbolic Kru Ze temple which ended with the deaths of many Muslims. The attacks signaled the resurgence of the separatist movement. This paper explores the reasons why, including the roots of ethnic conflicts and the spread of radical Islam. However, its main premise is to argue that the policies and management style of Thaksin Shinawatra and the Thai Rak Thai party were the real reason why this peaceful but potentially explosive region decided once more to take up arms. Thaksin’s aggressive stance, his desire to control all regions and all levels of politics, his lack of understanding of the culture and political landscape of the South all led to the violence which the South is presently witnessing.
DOI: 10.14457/cu.the.2006.1879
title: Pedagogical grammar of the aspect "ZHE" in Mandarin Chinese for Thai university students

description: To study the grammatical structure and semantic grammar of the aspect marker “ZHE” in Mandarin Chinese and to compare this with the aspect marker /jù:/ in Thai. Also, it focuses on Thai university students’ errors, analyses them, and takes the results as input to design grammar lessons on “ZHE” in order to encourage Thai university students in their understanding and precise usage of “ZHE”. The research finds that the grammatical structures of Mandarin and Thai have some differences and some similarities. For example in both Mandarin and Thai “ZHE” (in Mandarin) /jù:/ (in Thai) are collocated after the verb if no object is present in the sentence. However, if an object is in a sentence, “ZHE” remains after verb, while /jù:/ is moved to after the object. Semantically, “ZHE” and /jù:/ are the same and indicate the imperfective, stative progressive and the progressive. The grammar teaching lesson of the aspect marker “ZHE” is structured in the following order 1) meaning, 2) grammatical structure, and 3) the usage of “ZHE” with different types of verb. As the aspect marker “ZHE” has to be incorporated with a verb, the lesson concentrates on explaining the on-going action or state of both teacher and students in the classroom to encourage students’ memory and accurate usage of “ZHE” in everyday life.
DOI: 10.14457/cu.the.2006.1880
title: The relationship between microalbuminuria and proliferative diabetic retinopathy in type 2 diabetes

description: Objective: To study whether microalbuminuria is associated with proliferative diabetic retinopathy (PDR) in type 2 diabetes. Study design: Cross-sectional analytic study. Setting: Rajavithi Hospital, Lerdsin Hospital, Nopparatrajathanee Hospital, Mettaphacharak (Watraikhing) Hospital, Prathumthani Hospital, Lardlumkaew Hospital, and Nongsau Hospital. Research methodology: A total of 204 subjects (58 males and 146 females) were included in this study. Using urine dipsticks for microalbuminuria which positive at least 2 of the 3 morning urine samples within 6 months, 68 and 136 type 2 diabetic patients were found micro and normoalbuminuria respectively. Indirect ophthalmology of all subjects' eyes for PDR was performed by expert ophthalmologists. Result: The study finds that 4 subjects with normoalbuminuria and 1 subject with microalbuminuria were PDR. The prevalence of PDR is 2.5%. Conclusion: Microalbuminuria using urine dipstick is not associated cross-sectionaly with proliferative diabetic retinopathy in type 2 diabetes and it cannot be used as a marker for screening PDR.
DOI: 10.14457/cu.the.2006.1881
title: Mechanical and thermal properties of liquid crystal polymer/organoclay composite

description: The liquid crystal polymer/organoclay composites were prepared by melt intercalation of liquid crystal polymer and montmorillonite clay organically modified with intercalating agent. The surfactant, haxadecyltrimethyl ammonium bromide was used to modify the montmorillonite surface to obtain the organoclay by ionic exchange between the interlayer cation and the surfactant cation. The resulting liquid crystal polymer intercalated into the organoclay was characterized by X-ray diffraction (XRD) and Fourier Transform Infrared spectrometry (FTIR). Tensile testing indicated that the reinforcement in the composites was more effective than pure polymer. The thermal stability and flammability of the liquid crystal polymer/organoclay composite were measured by thermogravimetric analysis (TGA) and UL- 94, respectively. By adding organoclay, the thermal stability was improved but the surfactant decreased the thermal stability. The UL- 94, V- 0 rating was achieved for the liquid crystal polymer/organoclay composites with varying organoclay contents
DOI: 10.14457/cu.the.2006.1882
title: Quantitative analysis of Thai and Japanese sensation on color combination

description: This research aimed at investigating the Thai and Japanese sensation on color combinations and quantifying them relevant to CIE L*C*h color values. The experiment adopted a 7-point scale of 14 color sensation word pairs, based on prior thesis work, with 253 color pairs. These color samples were selected on the basis of PCCS color system. The color samples consisted of five hues (Red, Yellow, Green, Blue, and Purple) varied in four different tones (Vivid, Dull, Light and Dark) and three achromatic samples (White, Grey and Black). The experimental raw data were analyzed to derive the correlations coefficient between visual scores and colorimetric values. In addition, the cross-cultural comparison of the color combination sensation result was analyzed by statistic analysis; Paired Z- test was used to compare the similarity or difference in color sensations between the two cultures. The results showed that tree pairs of opponent sensation words "Dark-Light", "Vague-Distinct", and "Sombre-Vivid" had no significant difference at a significant level of 0.05
DOI: 10.14457/cu.the.2006.1883
title: Hydrodynamics and mass transfer in internal loop airlift contactor with annulus sparger in saline water

description: The investigation of the effect of salinity on the performance of airlift contactor was achieved using the 17L internal loop airlift system with a column height of 1.2 m, and 0.137 m diameter, and a draft tube height of 1 m. The diameters of the draft tubes were altered to vary the ratio between downcomer and riser cross sectional areas (A[subscript d]/A[subscript r]) from 0.061-1.01. The aeration was supplied in the superficial gas velocity (U[subscript sg]) from 0.01-0.07 m/s and the salinity levels were altered from 0, 15, 30, and 45 ppt. The Sauter mean diameter of the bubble appeared to be smaller in saline water than in fresh water due to two main reasons. The first one was the presence of hydrophilic repulsive force which inhibited bubble coalescence, and the second was the high Laplace pressure which promoted the breakup of the bubbles. The range of pressure difference, [delta]P, acting on the bubble which was found to promote bubble coalescence was between 15-20 N/m[superscript 2]. In saline water, the bubble size decreased with superficial gas velocity, u[subscript sg], where a reduction from 6 to 1 mm was observed with an increase in U[subscript sg] from 0.02-0.07 m/s. This was caused by the collision of bubbles at high gas hold-up in the system at higher gas flow rate which occurred at [delta]P greater than 20 N/m[superscript 2] and consequently supported bubble break-up. Axial variation in bubble size was only observed at low u[subscript sg] (less than 0.04 m/s) where bubbles in the bottom section of the airlift was larger than those in the middle and top sections. This was because the conditions in the middle and top sections were turbulent and with high [delta]P (27-65 N/m[superscript 2]), bubble break-up occurred. The effect of downcomer to riser area ratio was quite important and the highest range of [delta]P (approx. 50-97 N/m[superscript 2]) was found at the smallest downcomer area configuration which led to bubble break-up conditions. The overall volumetric mass transfer coefficient appeared lower in the saline water than in the fresh water where the levels of k[subscript L]a could be ordered from high to low as 0 ppt &gt; 30 ppt &gt; 15 ppt &gt; 45 ppt. The specific area was found to be high in the saline water systems, however, the mass transfer coefficient was much higher in the fresh water system than in the saline water. The mass transfer coefficient was controlled by both natural and forced convections which were related significantly to the diameter and slip velocity of the gas bubbles.
DOI: 10.14457/cu.the.2006.1884
title: Supramolecular chemistry of ditopic anion sensors and amphiphilic molecules

description: Two heteroditopic electrochemical anion sensors (2d) and (3d) comprised of crown ether for cation recognition and amidoferrocene for anion complexation using diaza-18-crown-6 and p-tert-butylcalix[4]arene as scaffold have been developed. Halide binding abilities of those two receptors in the presence and absence of Na[superscript +] and K[superscript +] cations have been investigated by [superscript 1]H NMR and electrochemical techniques compared to the monotopic receptor (1). From NMR studies, the proposed receptors presented the highest selectivity for Br[superscript -] in the presence of Na[superscript +]. In addition, they can act as electrochemical sensors for CI[superscript -] in the presence of Na[superscript +] and K[superscript +]. A new amphiphilic receptor containing a macrocyclic anionic headgroup and a single alkyl chain was prepared through an efficient templated synthesis, receptor (8b). The interdependence of the aggregation behavior and the host-guest chemistry was studied. In the absence of any guest the terminus of the alkyl chain of the receptor is included inside the hydrophobic cavity of the macrocycle leading to self-assembly into micrometer-long nanotubes. The alkyl chain can be displaced by an acridizinium bromide guest, which leads to a dramatic change in aggregate size and morphology. Studies of the solubilization of nile red suggest that the resulting aggregates are micelles having a cmc of around 35 [micrometre]. These results represent one of the first examples in which specific host-guest chemistry controls the size and shape of nanoscale aggregates.