cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2011.1275
title: Modification of mgcl2-supported Ziegler-Natta catalyst with Lewis acids for ethylene copolymerization

description: This research aims to investigate the effect of Lewis acids on the synthesized Ziegler-Natta (ZN) catalyst (MgCl2+Lewis acid/DEAC/TiCl4) for ethylene polymerization with various ratios of AlCl3 and ZnCl2 as the Lewis acids employed. The catalysts were characterized by ESR, SEM-EDX, ICP, and XRD. From the ICP analysis, it was found that the titanium content in catalyst decreased with increasing the amount of Lewis acid compared with in the absence of Lewis acid system. However, the result obtained from SEM-EDX showed that titanium content at surface of catalyst increased with increasing amounts of Lewis acid resulting in better catalytic activity due to most of reaction also occurred at the surface of catalyst. Moreover, the molecular weight distribution obtained from the GPC result apparently increased because the Lewis acid can be a part of catalyst leading to increased number of active centers.
DOI: 10.14457/cu.the.2011.1276
title: Functional equation analogous to the 2-dimensional wave equation

description: In this thesis, we find the general solution of the following functional equation which is analogous to the 2-dimensional wave equation.
DOI: 10.14457/cu.the.2011.1277
title: Effect of Happy Workplace Program : a case study of 2 firms in Thailand

description: The Happy Workplace Program (HWP) is a unique worksite health promotion program in Thailand, promoting mental and physical well-being of employees. As work-related illness and accidents are increasingly viewed as a global social issue, the HWP is considered to be such a program to resolve it. Since the importance of measuring the effect of these programs has been growing worldwide, this study contributes to the analysis of the effect of the HWP on employee absenteeism and job satisfaction, focusing on only two out of eight concepts contained within the HWP, Happy Body (physical exercise) and Happy Relax (relaxing activities).In this study, questionnaire survey was conducted to collect primary data from a total sample of 356 employees from Lion Corporation (Thailand) Limited and NOK Precision Component (Thailand) Ltd respectively. Established in 1969, LION represents traditional firms with a long history, while NOK represents modern firms with a history of less than 10 years. A case study of two such contrasting firms could yield referential empirical results for a wide range of manufacturers in Thailand. Not only simple data analysis but also econometric approach is employed, including the multiple regression, logit and simultaneous equation models.Empirical results show that Happy Relax proved to have a positive effect on job satisfaction across all models at NOK and LION, whereas Happy Body only proved itself at NOK. Age, salary, years of service and marital status have effect on job satisfaction and absenteeism with some limitations. Absenteeism is affected by job satisfaction at both firms. Some generalization can be drawn from the results in this study although further study with different firms and sample is necessary.It is recommended that firms with different characteristics introduce the HPW to increase job satisfaction and decrease absenteeism for their employees. Standardization of cause and effect will be also topic of further study.
DOI: 10.14457/cu.the.2011.1278
title: Dye-sensitized solar cells with TiO₂ electrode modified by ZrO₂, CeO₂, or ZnO

description: This research investigated the application of ZrO₂/TiO₂, CeO₂/TiO₂ or ZnO/TiO₂ composite thin film as an electrode layer for a dye-sensitized solar cell (DSSC) and the effect on the fabrication of double-layer structure of the thin film electrode the performance of DSSC. Each metal oxide was individually synthesized via sol-gel methods and mixed before being sprayed onto the fluorine doped tin oxide (FTO) glass substrates using an ultrasonic spray coater. The electrode layer was fired at 400℃ for two hours. The amount of ZrO₂, CeO₂, or ZnO added to TiO₂ was varied from 0 to 10%wt (for ZrO₂) and 0 to 7% wt (for CeO₂, or ZnO). The DSSC with pure TiO₂ electrode layer had the efficiency of 4.77±0.48%. The addition of CeO₂ appeared to reduce the cell efficiency significantly.On the other hand, the addition of ZrO₂ or ZnO increased the amount of dye molecules adsorbed on the electrode surface, leading to improved short circuit current density (J[subscript SC]) and the efficiency of the cells when compared to cells with pure TiO₂ electrode. The highest cell efficiency of 6.57±0.26% and 6.55±0.10% were obtained for the DSSC with 7wt% ZrO₂/TiO₂ and 5wt% ZnO/TiO₂ electrode, respectively. Double-layer electrode (7wt% ZrO₂/TiO₂ on top of pure TiO₂) brought about better light scattering, thereby enhancing the overall energy conversion efficiency from 6.57±0.26% to 9.28±0.34% when compared with single-layered ZrO₂/TiO₂ electrode.
DOI: 10.14457/cu.the.2011.1279
title: Effect of elastic therapeutic taping combined with stretching on heel pain and foot disability in persons with plantar fasciitis

description: The aim of this study was to examine the effects of elastic therapeutic taping plus stretching compared with stretching exercise in persons with plantar fasciitis. A nonequivalent control group pretest posttest quasi-experimental design was used. A total of 18 subjects that participated in the study were divided into two groups. Nine subjects in the intervention group received elastic therapeutic taping combined with stretching, while nine subjects in the control group received only stretching program. Outcome measures including levels of heel pain and foot disability were collected at baseline and week 2 after the treatments completed. Paired t-test was used for within-group analysis, and Independent t-test was used for between-group analysis. Results showed that the level of heel pain in the morning, pain during the days, average pain last week, and foot disability decreased significantly in both groups (p&lt;0.05). However, there was no statistically significant difference between groups in terms of changes in pain intensity in all three pain measures. Interestingly, level of foot disability in the “taping and stretching” group decreased significantly greater than that in the “stretching” group (p&lt;0.05). Therefore, apart from the effect on pain reduction, the elastic therapeutic taping could produce additional effect on promoting foot functional ability in persons with plantar fasciitis.
DOI: 10.14457/cu.the.2011.1280
title: Steer Peer Mobilizer (SPM) model for HIV/AIDS risk reduction among Men who have Sex with Men (MSM) in MSM hotspots, Chiang Mai province

description: This study aimed to establish a key MSM well-liked persons who were taught to endorse actively and visibly the importance and acceptability of behavioral change, as well as to convey strategies for change implementation, and produce reductions in MSM population who engaged in high-risk activities especially produce concomitant and population-wide increases in HIV/AIDS prevention’s concern, they are called as “Steer Peer Mobilizer (SPM).The study using a Participatory Action Research approach was conducted. The research involved 9 steps: 1) Established a partnership with stakeholders, 2) Organize a meeting with partner organizations, 3) Baseline survey, 4) Selection of MSM hot spots, 5) Identification of Steer Peer Mobilizer (SPM), 6) Formulation of Learning Process, 7) Conducting a training of SPM, 8) Implementation of SPM and 9) Evaluation of Learning Process and Outcome of Capacity Development. In the model implementation process, 20 trained SPMs were assigned to convey message and having conversations with their 3 identified peers focused on the utilization of behavioral change strategies. Pre-test and post test intervention scores of HIV/AIDS knowledge and attitude and sexuality as well as HIV infection risk behavior of the study group were compared to reveal the level of changes affected by the intervention. The primary outcome was the differences of HIV/AIDS knowledge and attitude and sexuality perception at 3 months after intervention completed. The secondary outcomes were the reduction of HIV risk behavior at 3 months after intervention completed.The result showed that HIV/AIDS knowledge and attitude and sexuality perception of the study group were significantly higher when compared between pre-intervention test and the post-test. The mean scores of HIV/AIDS knowledge and attitude and sexuality perception after intervention were higher than those before intervention (P&lt;0.001). Also those of them after intervention were higher reduced in HIV risk behavior (P&lt;0.001).The factors that effect on the acceptance of SPM model were training program contents and facilitation techniques used by the research team. Increasing of HIV/AIDS knowledge, awareness, and concern as well as reduction in HIV risk behavior were positively effect on the success of HIV/AIDS prevention pram for MSM group. Conclusion: Steer Peer Mobilizer (SPM) model with the focus of participatory action process significantly brought in a reduction of HIV risk behavior among MSM in Chiang Mai. This development model is documented as an innovative approach consistent to Thai context.
DOI: 10.14457/cu.the.2011.1281
title: Site selection for hazardous waste landfill and routing analysis for hazardous waste transportation using Geographic Information System at Changwat Khon Kaen province

description: The aim of this study is to identify a suitable site for constructing a hazardous waste landfill within Khon Kaen Province. A geographic information systems (GIS) software package was used to analyze various data sources in identifying and selecting a suitable landfill site. To identify potential areas, several factors including water resources, geology, sensitive area, community area, and other related factors were analyzed based on modified criteria for hazardous waste landfill from the Pollution Control Department (PCD), Thailand. To select a suitable landfill site, only potential areas having size large enough to be used for 20 years and a shortest distance for transporting hazardous waste from generators to the potential areas were considered. Results from the study revealed that eighteen potential areas were found within Khon Kaen Province. While, the first five least transport distances between generators and potential site were at site 6 in Tambon Muang Wan, Amphoe Nam Phong, site 7, site 9, site 8, and site 10 in Tambon Khok Song, Amphoe Ubonrat which the distance of 1223.52, 1225.99, 1245.12, 1288.35, and 1350.90 kilometers, respectively.
DOI: 10.14457/cu.the.2011.1282
title: Synthesis of silicon carbide by arc-discharge process

description: Silicon carbide is one of non-oxide ceramic materials which have been widely used in many in industrial applications due to its excellent mechanical properties, high thermal, and electrical conductivity, high thermal shock resistance, excellent chemical oxidation resistance, and high strength and stiffness. There are many methods used to fabricate silicon carbide such as carbothermal reduction process and sol-gel process. However, synthesis of silicon carbide is usually done by a process which consumes lots of energy for extended period of time. In this research, silicon carbide nanoparticles were synthesized by arc discharge process, which could produce the product within seconds. The anode, which was a carbon rod, was axially drilled and filled with silicon source, i.e. silicon monoxide powder. It was raised into a cylindrical-shaped cathode, which was also made from carbon rod. Both the anode and cathode were submerged in water. Upon the supply of direct current in the range of c.a. 80 A, arc discharge was induced. Nitrogen gas was continuously supplied through the cathode to carry the product from the arc-discharging zone to water. The effect of parameters .i.e., arc current, feeding gas component, gas flow rate and anode velocity were investigated to explain the mechanism of synthesis of silicon carbide by arc-discharge process.
DOI: 10.14457/cu.the.2011.1283
title: Selective hydrogenation of acetylene over Ni-Zn-P catalysts supported on polyureihane foam

description: In the present work, cheap metals were studied as alternative catalysts in the selective hydrogenation of acetylene. The Ni-Zn-P catalysts supported by polyurethane foam were prepared by electroless deposition method with various zinc salt contents in the deposition bath (6-24 g/l ZnSO4.7H2O). The amounts of Ni and P in the bath were fixed at 42 g/l NiSO4.6H2O and 24 g/l NaH2PO2, respectively. From the deposition rate, compression test, SEM and EDX results, increasing amount of Zn in the bath resulted in lower rate of metal deposition. The catalyst prepared with amount of Zn 18 g/l showed the best dispersion on PU foam as well as the highest Zn/Ni ratio and the highest amount of Zn obtained in the final catalysts at 27.3 wt% with Ni and P 65.2 and 7.5 wt%, respectively. Such catalyst also exhibited the best catalyst performances in terms of acetylene conversion and ethylene selectivity. Further improvement of the Ni-Zn-P catalysts can be obtained using the Al2O3 supports in the order: Ni-Zn-P/-Al2O3 pellet &gt; Ni-Zn-P/-Al2O3 powder &gt; Ni-Zn- P/PU foam (Zn 18 g/l).
DOI: 10.14457/cu.the.2011.1284
title: Multi-approach model for improving agrochemical safety among farmers in Pathumthani province, Thailand

description: Objectives 1) To evaluate the knowledge, beliefs and behaviors regarding agrochemical safety among rice farmers 2) To develop a model for improving farmer’s health and preventing them from agrochemical hazards. 3) To evaluate the effectiveness of the model of interventions associated with improving agrochemical safety among farmers in the Khlong Seven community in Pathumthani province, Thailand over the period October 2009 to January 2011. Methods Quantitative and qualitative data collections were divided into two phases. Firstly, a cross-sectional study: 482 rice farmers were randomly recruited. Secondly, a quasi-experimental study: fifty rice farmers from Khlong Seven Community (study group) and fifty one rice farmers from Bueng Ka Sam community (control group) were randomly recruited. The mean change in scores of the four variables of knowledge, belief, behavior, home pesticide safety assessment, and community participation regarding agrochemical safety were measured. Intervention involved in a combination of home visits and community participatory activities regarding agrochemical safety. Results Phase: Farmers had a neutral level of total belief regarding agrochemical use. They had neutral levels of perceived susceptibility, benefits, and barriers on agrochemical safety. The belief concerning the perceived of severity of agrochemicals was high (positive belief).They had a moderate level of total behavior regarding agrochemical safety and a moderate level of healthy personal care behavior. However, the level of use of personal protective equipment was low. Health risk behaviors regarding agrochemical exposure in the study area were mainly caused by the misuse of pesticides including the erroneous beliefs of farmers concerning pesticide toxicity, lack of attention to safety precautions and the use of faulty protective gear. Phase 2: After six months of the intervention program, there were significant improvements in the overall scores on knowledge, belief, behavior, the home’s pesticide safety assessment, and community participation regarding agrochemical safety in the study group (p&lt;0.05). There were no significant improvements in all total scores for the control group (p&gt;0.05). Conclusion Therefore, this intervention model appeared to be effective in improving agrochemical safety among the Khlong Seven Community rice farmer participants. To sustain the intervention, it is necessary to work collaboratively with the community partners and local authorities. However, this model can be applied to other vulnerable groups, and variation across regions should be concerned. For further study, biomarker assessments should be concerned.
DOI: 10.14457/cu.the.2011.1285
title: Modification of tapioca starch by hydroxypropyl substitution, crosslinking with phosphate and pregelatinization for use as a matrix for sustained release dosage forms

description: The objective of this study is to develop pregelatinized cross-linked hydroxypropyl starch (PCHS) for using as a matrix for sustained release tablet. The native tapioca starch was modified by substituted reaction with propylene oxide at three levels 2.5, 5.0, 7.5%, cross-linked with 0.1% sodium trimetaphosphate, and then pregelatinized by using drum dryer method. Physical and chemical properties of PCHS were investigated ie. particle morphology, moisture content, viscosity, swelling power, rheology, analysis of hydroxypropyl and phosphate groups by FT-IR & GC. It was found that temperature, pH, and ionic strength of medium had slightly effected on viscosity and the highest degree of substitution (DS) of PCHS 0.106 provided the highest viscosity and swelling power, following with 0.074 and 0.062, respectively. In dissolution testing, it was found that the PCHS matrix of 0.106 DS combined with 10 % of HPMC E4M released 92.64% of propranolol hydrochloride within 12 hrs in DI water, that similar to matrix which consisted only HPMC E4M. In various ionic strength of media at 0.05 and 0.10 had no effect on drug release. However, the PCHS gave slower release rate in 0.20 M NaCl solution when comparing with in DI water (f₂ =45.50). In addition, when comparing drug release in 0.1 N HCl solution with PBS pH 6.8, it was found that the pH of dissolution media had effect on drug released (f₂=32.32). Increasing compression force from 1000-3000 psi and changing the methods of dissolution test from basket to paddle method had no effect on drug release rate that the f₂ was 57.32. Therefore, the PCHS was alternative choices for used as hydrophilic matrix.
DOI: 10.14457/cu.the.2011.1286
title: Drugs and alcohol use by secondary school students in Thimphu, Bhutan

description: The problem of substance abuse is a global public health concern. Substance abuse is one of the most prevalent issues that people face and has afflicted millions of people around the world. Though the substance abuse is a fairly new phenomenon in Thimphu, Bhutan, its use has been escalating over the years. Only few studies, to find out the prevalence of substance use and alcohol use among students and the community, have been conducted in the recent past in Bhutan.As a step towards establishing the current trend of alcohol, smoking and drug use among adolescents in secondary schools, Thimphu, Bhutan, 423 students from various schools within the city were surveyed using self administered questionnaire. Multi stage sampling method was used to determine sample size. Selective variables such as demography and environment factors were computed using chi square statistics to find out the association. As a result of this cross sectional study, the data revealed that drug abuse is common among school children, and age of the student, academic performance, education and occupation of parents, peer pressure and curiosity are found to be significantly associated with alcohol, smoking and drug use (p-value α&lt;0.05) among school children.
DOI: 10.14457/cu.the.2011.1287
title: Global warming campaigns in Bangkok : framing analysis and campaign effectiveness

description: Thailand has responded to global warming with strategies of mitigation and adaptation. Green campaigns targeting citizens have not significantly improved environmental behaviours, particularly in the Bangkok metropolitan area. This research will identify and analyse the frames held by global warming experts in Thailand and those used in the Bangkok Metropolitan Administration (BMA) environmental campaign as well as frames reported by target audience members before and after the campaign. All frames will be compared to identify campaign effectiveness based on their consistency. The use of framing theory in this way to evaluate campaigns will be an innovation in bridging the different traditions as well as research methods in the field of communication studies. From in-depth interview with the expert, it turned out that the dominant frames are Social Frames. The most common frames found in campaign materials are Financial Frames. Finally, the survey of target audience members demonstrates the relationship between frames held before and after the campaign and that the Scientific Frame are mostly reported. From the integrative analysis, the inconsistency of frames emerged in three main elements in this campaign communication can be a part of ineffectiveness of BMA campaign in encouraging citizens’ change of action. Therefore, combining existing traditional frames (e.g. Buddhism and King’s Philosophy of Sufficient Economy Frames) and perceived global warming frames (e.g. Scientific Frames) can be used to create better response in dealing with this issue particularly among residents in Bangkok. Theoretically, framing analysis can be applied to study campaign communication and to be extended to the Thai context. The results can also be used to create the effective global warming campaigns for Thailand in the future.
DOI: 10.5523/bris.1ojfuekso3i422qmp2s8jb02p4
title: Byers_et_al_Drought_Electricity_DECIPHeRFlowSims
title: Hydological model projections for the future risk of power plant cooling water shortages

description: This dataset provides an ensemble of hydrological model projections for 24 UK gauging stations covering three time slices (baseline 1974-2004, near future 2020-2050 and far future 2070-2100). Daily flow timeseries are simulated using the hydrological model DECIPHeR (Coxon et al, 2019). The forcing data consist of daily observed rainfall and potential evapo-transpiration to calibrate the model against observed flows. An ensemble of 100 hydrological model parameterisations are then forced by 100 climate simulations for three time-slices from a large set of present and future meteorological timeseries for the UK (Guillod et al, 2018). These simulations have been used to investigate the price impacts of cooling water shortages on Britain’s power supplies using a probabilistic spatial risk model of meteorological droughts, river flows and cooling water shortages, coupled with an economic model of electricity supply, demand and prices.