cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2011.1734
title: The effect of political instability on capital flight and foreign direct investment

description: Nowadays, Political instability is the major problem for almost every region. All of financial markets throughout the world are inevitably affected by uncertainty in politics. The political instability impacts many functions in financial market especially flows of fund. It is not only normal capital flow, foreign direct investment but also abnormal capital flow, capital flight that have been affected by political instability. This paper examines the effect of political instability on capital flight and foreign direct investment. The effect is observed in emerging market, developed market, Asian emerging market and non-Asian emerging market. To investigate the effect, panel data analysis is applied and three measured methods of capital flight, residual, dooley, and hot money method, are used. In addition, five political variables are applied to capture the political effects in different aspects. This paper finds that political instabilities discourage capital flight and foreign direct investment inflow in emerging market. However, the magnitude of the political instability is higher in developed market than in emerging market. Besides, the magnitude of political instability on FDI is higher in non- Asian emerging than in Asian emerging markets.
DOI: 10.14457/cu.the.2011.1735
title: Among the Royal Thai Navy personnel

description: The purpose of this study was to identify predicting factors of quitting smoking among the Royal Thai Navy Personnel. The study used a cross-sectional, descriptive correlational research design using self-reported questionnaires based on Transtheoretical model (Prochaska and DiClemente, 1983). Multi-stage random sampling was employed to obtain the sample of RTN personnel who had quit smoking for at least 24 hours in the past year. Data were analyzed using descriptive and inferential statistic of 553 RTN personnel was used to analyze the predictors. Descriptive statistics were used to evaluate characteristics health status, smoking and quitting characteristics, The alcohol use disorders identification test (AUDIT) self stress test, Fagerstrom Test for Nicotine Dependence (FTND), processes of change, decision balance, and self-efficacy. Logistic regression analysis was used to calculate odds ratios with 95% confidence interval of abstinence rates for each variable. And the level of any statistical tests was established at p = 0.05 The results indicated that the predicting factors of quitting smoking among the Royal Thai Navy were length of past quit attempt (OR=1.05, 95% CI=1.04-1.06), family support (OR=1.51, 95% CI=1.06-2.15), conscious raising (OR=1.5, 95% CI =1.06-2.15), social liberation (OR=.81, 95% CI=.73-.90), self-reevaluation (OR=.84, 95% CI=.0.75-0.94),counter condition (OR=1.15, 95% CI=1.03-1.29). The best equation of logistic regression explained to 56.5% of the variance in quitting smoking among the RTN personnel.
DOI: 10.14457/cu.the.2011.1736
title: Ideal theory in some ternary semirings

description: In this thesis, we study the ideal theory in the ternary semiring Z₀[superscript +] of non-negative integers and the ternary semiring Z₀[superscript -] x Z₀[superscript -] of ordered pairs of non-positiveintegers and obtain some results regarding the ideals of these ternary semirings. Moreover, we show that the ternary semirings Z₀[superscript +] and Z₀[superscript -] are isomorphic as well as the ternary semirings Z₀[superscript +] x Z₀[superscript +] and Z₀[superscript -] x Z₀[superscript -]. We also compare the ternary semiring Z to the ring Z.
DOI: 10.14457/cu.the.2011.1737
title: Factors affecting the demand for formal long-term care of elderly : a case study in the municipality of muang district, Pathum Thani Province

description: Background: Older people need long-term care due to increasing health problems. Pathum Thani Province had rising numbers of elderly; however, there was no study about formal long-term care for elderly. Objectives: To study the demand for formal long-term care of elderly and factors affecting it. Methods: Interviewed 85 elderly sampled from the Municipality of Muang District, Pathum Thani Province with questionnaires consisted of general and health data, and price scenario of different types of care. The relationship between dependent and independent variables were analyzed by repeated measure binary logistic regression. Results: Dependent elderly relied on informal long-term care. Only 1 elderly used formal home caregiver service. More of the independent elderly demanded to hire home caregiver than those who would use residential home service, even though the latter was better known. Probability of utilization of full-time, daytime home care and residential home service were 6.4, 0.3 and 0.3 percent accordingly. Higher income increased the odds of demand and higher service price decreased them like normal goods and services. Need factors increased the likelihood of using formal care, except for residential home. Other factors affecting the demand were slightly different among the three types.
DOI: 10.14457/cu.the.2011.1738
title: Synthesis of porous silicon nitride via the carbothermal reduction and nitridation of silica/PRF gel composite

description: This research studied the synthesis of porous silicon nitride, one of the most promising structural materials for applications in filter at high-temperature, from silica/phenol-resorcinol-formaldehyde (PRF) gel composite which was prepared by combining sol-gel and polymerization of phenol, resorcinol and formaldehyde using sodium carbonate as catalyst and 3-aminopropyl trimethoxysilane (APTMS) as silica precursor. After aging of the silica/PRF gel for 72 hours, t-butanol was used in the solvent exchange process for 24 hours and repeated for 3 times. Then the sample was dried in freeze drying processes at -40°C for 3 days. Next, the silica/PRF composite was pyrolyzed under nitrogen gas and pre-calcined first under air at temperature in the range of 400-500°C for 2 hours to convert the PRF structure into porous carbon and partially remove carbon from the composite, respectively. Finally, the composite was subjected to the carbothermal reduction and nitridation at 1450°C for 10 hours followed by the removal of residual carbon by calcination at 800°C for 8 hours. From the results, differences in molar ratio of phenol-to-resorcinol, silica-to-carbon and pre-calcination temperature result in difference in porosity of both silica/carbon composite and that of silicon nitride product. The pre-calcination is the major effect to improve the porosity, which has an effect on porosity of silicon nitride product. Moreover, it was also found that the use of pre-formed silica sol, which is another way to decrease violent interaction between silica precursor and the PRF solution, has an effect on porosity and crystallite size of silicon nitride product.
DOI: 10.14457/cu.the.2011.1739
title: Les problèmes de la prononciation du français chez les lycéens Thaïlandais

description: Cette recherche a pour but d’étudier et d’analyser les problèmes de prononciation du français chez les lycéens thaïlandais, notamment sur les sons vocaliques, consonantiques, la liaison, le groupe rythmique et l’intonation. Les résultats de la recherche nous permettent de tirer les conclusions principales suivantes : 1.Les voyelles qui causent beaucoup de problèmes de prononciation chez les lycéens thaïlandais de Mathayom suksa 4 à Mathayom suksa 6 sont les suivantes : [ø] et [y]. 2.Les consonnes qui causent beaucoup de problèmes de prononciation chez les lycéens thaïlandais de Mathayom suksa 4 à Mathayom suksa 6 sont les suivantes : [g], [ɥ], [R], et [z]. 3.Les lycéens thaïlandais tendent à négliger de prononcer les consonnes de liaison dans les cas de liaison obligatoire mais tendent à les prononcer dans les cas de liaison interdite. 4.Les lycéens thaïlandais peuvent couper et prononcer les phrases en groupes de sens. 5.Pour l’intonation, le problème se trouve dans le cas de l’interrogation à syntaxe énonciative. 6.Les problèmes de prononciation du français chez les lycéens thaïlandais proviennent des causes suivantes : 6.1Manque de connaissances suffisantes sur les règles de prononciation du français et sa relation son-graphie. 6.2Inexistence de certains sons vocaliques et consonantiques français et aussi de certains éléments prosodiques dans le système phonétique du thaï. 6.3Interférence de l’anglais, première langue étrangère. 6.4Interférence de la langue maternelle.
DOI: 10.14457/cu.the.2011.1740
title: An application of virtual microscopy in the pathology laboratory teaching for undergraduate medical student

description: Objectives: To compare students’ performance and perceptions between using traditional microscopy (TM) and applying virtual microscopy (VM) as a new teaching strategy in pathology laboratory teaching for year-2 and year-3 medical students at the faculty of Medicine, Srinakharinwirot University in the academic year 2011. Research Design: A prospective crossover design. Participants: All Year-2 and Year-3 medical students in the academic year 2011. Methods: All students were assigned to either TM or VM for 2 pathology modules in a system-based curriculum. The effectiveness of both learning methods was determined by students’ performance on pathology-based examination questions established at the end of each session. The examination questions were ensured for their content validity and difficulty factor. Students’ perception of using VM was surveyed by a developed 5 Likert scale questionnaire. Descriptive analysis was performed to compare the mean scores of performance and students’ perception in each dimension. Results: Paired t-test revealed that the mean score between using TM and VM was significantly different (p &lt; .05) in class year-3, but not for year-2. Students responded positively in a survey about using VM, indicating that is convenient, provides good image quality, and they prefer to use it. Conclusion: VM did not significantly impact the students’ performance in undergraduate pathology course, as measured by the examination test scores, but was considered highly acceptable as a new teaching strategy. These results can encourage the department, faculty, and university to consider the implementation of VM for medical education in teaching pathology and other relevant subjects that use TM.
DOI: 10.14457/cu.the.2011.1741
title: Exclusive breastfeeding experiences among mothers in Bangkok, Thailand : findings from a mixed-methods study

description: The purpose of this mixed-methods study was to investigate knowledge, attitude and exclusive breastfeeding practice, as well as, facilitators and barriers to exclusive breastfeeding in Bangkok. This cross-sectional study of 208 postpartum mothers used a quantitative questionnaire to assess knowledge, attitude and practice, as well as facilitators and barriers to exclusive breastfeeding practices. Qualitative analyses were based on in-depth interviews of 7 postpartum mothers and 2 breastfeeding experts. Data were analyzed using descriptive statistics, Chi square and multivariable analyses. In the quantitative analyses, 14% of Thai women in Bangkok did exclusive breastfeeding for some duration of time, with 10.1% exclusively breastfeeding for 6 months. Income level, knowledge of breastfeeding, number of times breastfeeding was discussed during antenatal visits and caesarean deliveries were positively associated with exclusive breastfeeding, with number of times breastfeeding discussed being the most highly associated facilitator (two times: OR 3.798, 95% CI: 1.039, 13.879; 3 or more times: OR 3.374, 95% CI: 1.034, 11.016). Qualitative data showed low milk supply, working outside the home, supplemental feedings (especially water) and perceived lack of supports as barriers and parents, hospital staff and knowledge as strong facilitators to an exclusive breastfeeding practice. Increased knowledge regarding an infant’s ability to thrive on breast milk alone for 6 months and enhanced discussions during antenatal care are important to increase exclusive breastfeeding.
DOI: 10.14457/cu.the.2011.1742
title: Synthesis of porous γ-alumina with resorcinol-formaldehyde gel template via spray drying

description: The synthesis of porous alumina powder by aluminium preformed sol and the controlling textural properties of alumina by using synthesized carbon template via spray drying process have been studied. Firstly, aluminium acetylacetonate (A) has been dissolved with formaldehyde solution (F) to form aluminium preformed sol. Resorcinol-formaldehyde solution has been also prepared by sol-gel processing as assisted-template to obtain high porosity alumina. The conditions to prepare the preformed aluminium sol and RF-gel were studied in the different aging time. In addition, the sol-gel reaction was studied with the different aluminium acetylacetonate to formaldehyde (A/F) molar ratio and resorcinol (A/R) molar ratio. The preformed aluminium sol was added into RF solution and use ethanol as solvent of the mixed gel. To obtain the powder of aluminium/RF-gel composite, the mixed gel was dried via spray dryer. The powder was further calcined to obtain porous γ-alumina at 800°C. The results show the maximum surface area of conventional dried alumina is 327 m²/g while the maximum surface area of spray dried alumina is 209 m²/g. Although the alumina particle from spray dryer is lower surface area than the particle from conventional drying, the spray dried products has uniform mesopore size.
DOI: 10.14457/cu.the.2011.1743
title: D’ Alembert’s functional equations on compact homogeneous spaces

description: In this work, we introduce and solve a new functional equation on compact homogeneous spaces based on the d’Alembert’s functional equation. Our work extends the result of D.Yang, in which the d’Alembert functional equation on compact groups was solved with tools from harmonic analysis.
DOI: 10.14457/cu.the.2011.1744
title: Determination of oxalate content in tea samples by high performance liquid chromatography

description: This study was conducted to determine oxalate content in tea samples and study the effect of steeping duration on the oxalate content. One-hundred and twenty samples of both leaf and bag forms of tea-white, green, oolong, and black teas from 40 brands-were purchased from markets in Thailand from February to June 2011. The oxalate content was measured by the high performance liquid chromatography (HPLC) method. The results showed that in leaf form, the highest oxalate content was found in black tea (2.32 ± 1.10 mg/g tea), then in oolong tea (1.62 ± 0.79 mg/g tea), green tea (1.41 ± 0.56 mg/g tea) and lowest in white tea (1.29 ± 0.33 mg/g tea). In bag form, the oxalate content in black tea (2.37 ± 0.80 mg/g tea) was higher than that of oolong tea (1.88 ± 1.04 mg/g tea). The amount of oxalate in green tea (1.24 ± 0.48 mg/g tea) was comparable with that of white tea (1.25 ± 0.45 mg/g tea). The forms (leaf or bag) of tea did not have significant influence on the amount of oxalate. Steeping the tea for a longer duration provided more oxalate content. People with high risk of kidney stones should avoid drinking high amounts of black tea. Steeping tea for a short duration is also recommended for limiting oxalate intake.
DOI: 10.14457/cu.the.2011.1745
title: Pharmacokinetic parameters of atazanavir in ritonavir-boosted combination therapy in Thai healthy volunteers : comparison between reduced doses of ritonavir or atazanavir

description: The standard dose of atazanavir (ATV)/ritonavir (RTV) 300/100 mg once daily results in higher ATV exposure in Thai populations. This study was to compare the pharmacokinetic (PK) parameters and hyperbilirubinemia when lower than standard dose of ATV/RTV was given in 31 adults Thai healthy volunteers. Subjects were randomly assigned into 2 groups who were administered with the different doses of ATV/RTV (group I: 300/100 vs. 300/50, group II: 300/100 vs. 200/50). There were no statistically significant differences between the two groups in demographic data. The geometric means (GM) of ATV for 300/100, 300/50 and 200/50 mg once daily doses, respectively, were as follows: AUC₀₋₂₄(mg-h/L) 40.66, 25.50, 24.97; C[subscript max](mg/L) 4.12, 2.83, 2.58; C[subscript min](mg/L) 0.53, 0.27, 0.24, respectively. ATV AUC₀₋₂₄, C[subscript max] and C[subscript min] for 300/50 and 200/50 mg were statistically significant lower than 300/100 mg but did not show significantly different between 300/50 and 200/50 mg. ATV C[subscript min] for 300/100, 300/50 and 200/50 mg, respectively, were as follow: in subtherapeutic (%) 0, 31, 33; within therapeutic range (%) 74, 56,67; overtherapeutic (%) 26, 13, 0, respectively. There was significantly decrease in bilirubin concentration after dose reduction. Therefore, the reduced dose of ATV/RTV resulted in decreasing in both ATV C[subscript min] and hyperbilirubinemia. However, further investigation in Thai HIV-infected patients is required.
DOI: 10.14457/cu.the.2011.1746
title: Development of Mn-Na₂WO₄ catalyst on La₂O₃, Y₂O₃ and YSZ supports for oxidative coupling of methane reaction in fixed bed and solid oxide fuel cell reactors

description: This research studies the development of Mn-Na₂WO₄ catalysts on La₂O₃, Y₂O₃ and YSZ supports for oxidative coupling of methane reaction. It can be divided into two parts; (1) study in fixed bed reactor (FBR), and (2) study in solid oxide fuel cell reactor (SOFC). In part I, the experiments were performed using co-feeds of methane, oxygen and nitrogen inert gas at a ratio of 4:1:5 for different temperatures (973-1173 K). Mn-Na₂WO₄ catalyst on supports La₂O₃, Y₂O₃ and YSZ were doped with sulfur, phosphorous, and cerium in order to improve its catalytic reactivity. The results indicated that sulfur and phosphorous showed the good improvement for Mn-Na₂WO₄ catalyst on YSZ support. At 1073 K, S-Mn-Na₂WO₄/YSZ provided C₂ selectivity of 60.3% and methane conversion of 31.1%, while P-Mn-Na₂WO₄/YSZ offered C₂ selectivity of 59.8% and methane conversion of 34.1%. S-Mn-Na₂WO₄/YSZ, P-Mn-Mn-Na₂WO₄/YSZ and Mn-Na2WO4/YSZ catalysts part I were selected as anode catalysts for further study in the SOFC reactor. The experiments were carried out using La[subscript 0.8]Sr[subscript 0.2]MnO₃ (LSM) as the cathode catalyst, 8mol% yttria-stabilized zirconia (YSZ) as the electrolyte. P-Mn-Na₂WO₄/YSZ exhibited the best performance, providing C₂H₄ selectivity of 89.0%, methane conversion of 10.5% and electrical power density of 13.2 W/m² at 1123 K. In addition, the stability of the P-Mn-Na₂WO₄/YSZ catalyst was tested at 1123 K. Good stability of the reaction system could be observed at least for twenty nine hours.
DOI: 10.14457/cu.the.2011.1747
title: Preparation and controlled release of 8-hydroxyquinoline from biodegradable chitosan films

description: This research explores the preparation of 8-hydroxyquinoline (8-HQ) loaded in chitosan films for controlled release to extend vase life of rose. 8-HQ/chitosan films were prepared by using solvent casting method. The effects of the concentration of chitosan films and 8-HQ were investigated. The effect of the concentration of tripolyphosphate (TPP) used as the crosslinking agent for chitosan films was studied including the crosslinking time. Slow release was achieved from 8-HQ/chitosan films prepared using a higher concentrations of chitosan, TPP and longer crosslink time. The characteristics of film was determined by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. Optimum conditions of prolong vase life of rose for 10 days is 200 ppm of 8-HQ loaded chitosan films combined with 20% w/v of sugar solution. Furthermore, the film solution could be reused for another set of rose which could extend the vase life of another set of rose up to 7 days. This advantage can reduce the use of 8-HQ and chitosan films were easy to use and reusable.
DOI: 10.14457/cu.the.2011.1748
title: α-glucosidase inhibitors from Moringa oleifera leaves and Sesamum indicum seed pulps

description: α-Glucosidase inhibitors and applied as the effective therapeutic approach for treatment of type II diabetes. We have examined the inhibitory effect of Thai medicinal plants against α-glucosidase. The Moringa oleifera leaves and Sesamum indicum defatted seeds, which are edible plants and cultivated in Thailand, were selected for this investigation are Chromatography technique and bioassay-guided fractionation led to the isolation of active components. The isolation of methanol crude extract from M.oleifera leaves afforded two phenolic glycosides named niazirin and pyrrolemarumine 4"-O-α-L-rhamnopyranoside and two flavonoid glycosides named kaempferol-3-O-β-glucopyranoside and quercetin-3-O-β-glucopyranoside. All the isolated compounds were tested for inhibitory activity against α-glucosidase. Only phenolic glycosides selectively inhibited α-glucosidase from baker’s yeast. Niazirin was the most potent α-glucosidase inhibitor against baker’s yeast, which was approximately 8 times more active than that of antidiabetic drug acarbose whereas flavonoid glycosides selectively inhibited that from rat intestine; in which the most active compound quercetin-3-O-β-glucopyranoside inhibited maltase (IC₅₀ 95.73 µM) and sucrase (IC₅₀ 54.80 µM). On the other hands, the isolation of methanol crude extract from S.indicum defatted seeds afforded three lignans named sesamin, sesamolin and pinoresinol. They broadly inhibited α-glucosidase from baker’s yeast (IC₅₀ 0.20-0.49 mM), whereas pinoresinol selectively inhibited maltase from rat intestine (IC₅₀ 0.0343 mM). To gain insight into inhibition mechanism of pinoresinol, kinetic study was carried out. A kinetic analysis showed that pinoresinol inhibited maltase by mixed- type manner. Notably, the inhibition mechanism of pinoresinol is first reported herein.