cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2014.277
title: GREEN TOBACCO SICKNESS (GTS) IN THAI TRADITIONAL TOBACCO FARMERS RELATED TO THEIR OCCUPATIONAL EXPOSURE IN NAN PROVINCE, THAILAND

description: The aim of this study was to investigate prevalence of Green Tobacco Sickness (GTS) and occupational exposure on Thai traditional tobacco farmers in Nan Province, Thailand. To measure salivary cotinine levels and to measure pesticide exposure levels by Test Mate OP Kit and personal protective behaviors on tobacco farmers. To determine the relationship between GTS and salivary cotinine levels, pesticide exposure levels, personal protective behaviors. This study was a cross-sectional study and prospective study that conducted on 473 tobacco farmers; 319 Thai traditional tobacco farmers from Praputtabath Sub-District, Chiangklang District and 154 from Phatow Sub-district in Thawangpha District were randomly selected and interviewed in person by means of questionnaires and environmental surveying. Descriptive statistics including Chi-squared Test, spearman’s correlation (Spearman’s rho) and multiple logistic regression analysis were used to potentially identify risk factors pertaining to GTS. The prevalence of GTS was found to be 22.62%. risk factors which are associated with GTS were dependent of certain farmer characteristics; gender, smoking, skin rash, wearing wet suit, process of curing tobacco leaves and watering tobacco plants. Almost of them were using rubber latex gloves that it is possibility to increase nicotine absorption due to climate weather may promote sweat on their hand and were not statistically significantly associated with GTS (Chi-square test, p&gt;0.05). The prevalence of risky level of AChE was 61.90% and safe level was 38.10%, risk level of PChE was 42.86% and safe level was 57.14%. However, pesticide was not applied in all period and a symptoms of GTS in which some of them do not use pesticide before, thus possible to indicate a safe level of AChE and PChE contribute to associate with nicotine poisoning in the other name of GTS(Chi-square test, p&lt;0.05) .From this study demonstrated the usefulness to use salivary cotinine level measured by NicAlert™ cotinine test strips (NCTS), were well correlated with farmers who working with dry tobacco producing. Salivary cotinine levels were also significantly correlated with the prevalence of GTS among tobacco farmers group in any time to testing across crop season.The six test (T6) was strongly correlate between salivary cotinine levels and GTS (Spearman's correlation coefficient=0.735, P&lt;0.01) Dealing with strong positive correlated between wore mask, good practices through changing wet suit during work and GTS is most remarkable from this study(Spearman's correlation coefficient=0.894, 0.496, P&lt;0.01) respectively. Finally, the long-term effects of such exposure should be investigated and health education program with health risk exposure for increase awareness of farmers is recommended.
DOI: 10.14457/cu.the.2014.278
title: EFFECTS OF COMMUNICATION STRATEGY INSTRUCTION ON ENGLISH SPEAKING ABILITY AND CONFIDENCE OF EFL UNDERGRADUATES

description: This study was conducted to fulfill three objectives: (1) to investigate the effects of the Communication Strategy Instruction (CSI) on speaking ability, (2) to examine the effects of the CSI on speaking confidence, and (3) to explore the attitudes of EFL undergraduates towards the CSI. The study was conducted with a sample group of 34 undergraduates majoring in Business Administration enrolling in the Experiential English I in the first semester of the academic year 2013 at Chulalongkorn University. Data were collected using the English Speaking Test and English Speaking Confidence Scale before and after the instruction. The mean scores of the pre-assessment and the post-assessment were compared using paired-samples t-test and Cohen’s d to measure the effects and the magnitudes of the effects caused by the instruction. Data were also collected using the Attitude Questionnaire after the instruction to explore EFL undergraduates’ attitudes of towards the instruction, and analyzed by means of descriptive statistics and content analysis. The findings regarding speaking ability revealed a statistically significant difference at 0.05 level, with a large effect size (d = -0.95). However, no statistical significance was found when it came to confidence. Finally, the findings exhibited the students’ positive attitudes towards the instruction. Based on the findings, it is recommended that the developed instruction should be implemented as one of the effective means to enhance EFL undergraduates’ speaking ability and confidence.
DOI: 10.14457/cu.the.2014.279
title: SIGNIFICANT CONTRIBUTION ASSESSMENT OF HEAVY METAL CONTAMINATED RIVER SEDIMENT DUE TO HEAVY METAL MIGRATION BY SOIL EROSION IN A REMOTE WATERSHED

description: The Mae Tao Basin is a small basin located in Mae Sot, Thailand. The Mae Tao Creeks is a main branch belongs to the basin, originates at Doi Mae Tao and Doi Rei Pha. The Creeks has the flow direction pass through the mining production area and residential area. The Creeks has been claimed as a cadmium contamination site, which is certified to be higher than the acceptable level at 5.0 mg/L in water. Due to the geological characteristic of the area that is the deposition area of zinc-composite mineral, there are some possibilities that the natural erosion by the flood during the wet season can wash down the small particles with high concentration of zinc and cadmium into the Mae Tao Creeks. According to this information, the study has been set up and aimed to clarify the possibility that geological characteristic of the basin can contribute to the concentration of cadmium. The study has been set up by applying the combination between empirical study based on Revised Universal Soil Loss Equation (RUSLE) and a hypothetical estimation using hydrological model name as MIKE which has a capability to simulate the phenomena of the water especially overland flow in basin scale and the remote sensing technique. In order to evaluate the potential of geological characteristic of the area as a contributor for contaminated particles and sediments, new external modules named as Overland flow Sediment Transport module (OfSET) was developed. This development can enhance the capability of the program from simulating only the sediment transport via channel flow, to be capable to simulation the migration of cohesive contaminated particles through the overland flow over the surface area of the Mae Tao Basin. The model input, applied in this study come from both primary and secondary sources. Direct field observations were conduct in the available area of the basin, while some in the remote area were represented by the secondary value from literatures review. As a result of empirical estimation, mining production area demonstrates the highest potential in releasing cadmium contamination flux due to erosion at 1.854 ± 0.088 t/ha/y. For the hypothetical estimation, total cadmium flux in stream sediment, transported by the Mae Tao Creeks, is equal to 21.93 kg and 0.51 kg during wet and dry season of 2012-2013 respectively. Additionally, cadmium transported via overland sediment are equal to 8.36 kg and 0.08 kg in wet and dry season. These simulated values indicate that the natural zinc- cadmium deposition in the Mae Tao Basin is one of the contributions of cadmium contamination in the Mae Tao Creeks with the highest contribution at 38.12% in wet season.
DOI: 10.5281/zenodo.3337802
title: Mapping of the calving front of Tracy Glacier, North West Greenland, by UAV photogrammetry

description: These data contain photogrammetrical data collected by unmanned aerial vehicle (UAV) in July 2017 in the Inglefield Bredning. The data include processed data (orthoimage and digital elevation models) with the Structure-fom-Motion photogrammetrical software Agisoft Photoscan. Data are organized by glacier surveys with the following convention GLACIER_YYYYMMDD_HHMM. For instance : tracy_20170705_1914 contains the Data of the survey of Tracy glacier that started on July 5, 2017 at 19:14 UTC time. Coordinate system used is UTM Zone 19N based on WGS84 Take-off and landing site lattitude and longitude was ( 77.497424 , -66.678433 ) The data are related to the article "High-endurance UAV for monitoring calving glaciers: Application to the Inglefield Bredning and Eqip Sermia, Greenland", G. Jouvet, Y. Weidmann, E. van Dongen, M. Lüthi, A. Vieli, J. Ryan, Frontiers in Earth Sciences
DOI: 10.5281/zenodo.3337803
title: Mapping of the calving front of Tracy Glacier, North West Greenland, by UAV photogrammetry

description: These data contain photogrammetrical data collected by unmanned aerial vehicle (UAV) in July 2017 in the Inglefield Bredning. The data include processed data (orthoimage and digital elevation models) with the Structure-fom-Motion photogrammetrical software Agisoft Photoscan. Data are organized by glacier surveys with the following convention GLACIER_YYYYMMDD_HHMM. For instance : tracy_20170705_1914 contains the Data of the survey of Tracy glacier that started on July 5, 2017 at 19:14 UTC time. Coordinate system used is UTM Zone 19N based on WGS84 Take-off and landing site lattitude and longitude was ( 77.497424 , -66.678433 ) The data are related to the article "High-endurance UAV for monitoring calving glaciers: Application to the Inglefield Bredning and Eqip Sermia, Greenland", G. Jouvet, Y. Weidmann, E. van Dongen, M. Lüthi, A. Vieli, J. Ryan, Frontiers in Earth Sciences
DOI: 10.5281/zenodo.3338645
title: Mapping of the calving front of Heilprin Glacier, North West Greenland, by UAV photogrammetry

description: These data contain photogrammetrical data collected by unmanned aerial vehicle (UAV) in July 2017 in the Inglefield Bredning. The data include processed data (orthoimage and digital elevation models) with the Structure-fom-Motion photogrammetrical software Agisoft Photoscan. Data are organized by glacier surveys with the following convention GLACIER_YYYYMMDD_HHMM. For instance : heilprin_20170705_1914 contains the Data of the survey of Heilprin glacier that started on July 5, 2017 at 19:14 UTC time. Coordinate system used is UTM Zone 19N based on WGS84 Take-off and landing site lattitude and longitude was ( 77.497424 , -66.678433 ) The data are related to the article "High-endurance UAV for monitoring calving glaciers: Application to the Inglefield Bredning and Eqip Sermia, Greenland", G. Jouvet, Y. Weidmann, E. van Dongen, M. Lüthi, A. Vieli, J. Ryan, Frontiers in Earth Sciences
DOI: 10.5281/zenodo.3338646
title: Mapping of the calving front of Heilprin Glacier, North West Greenland, by UAV photogrammetry

description: These data contain photogrammetrical data collected by unmanned aerial vehicle (UAV) in July 2017 in the Inglefield Bredning. The data include processed data (orthoimage and digital elevation models) with the Structure-fom-Motion photogrammetrical software Agisoft Photoscan. Data are organized by glacier surveys with the following convention GLACIER_YYYYMMDD_HHMM. For instance : heilprin_20170705_1914 contains the Data of the survey of Heilprin glacier that started on July 5, 2017 at 19:14 UTC time. Coordinate system used is UTM Zone 19N based on WGS84 Take-off and landing site lattitude and longitude was ( 77.497424 , -66.678433 ) The data are related to the article "High-endurance UAV for monitoring calving glaciers: Application to the Inglefield Bredning and Eqip Sermia, Greenland", G. Jouvet, Y. Weidmann, E. van Dongen, M. Lüthi, A. Vieli, J. Ryan, Frontiers in Earth Sciences
DOI: 10.14457/cu.the.2014.280
title: A DEVELOPMENT OF A 3-PHASE SMART METER CONFORMED TO DLMS-COSEM AND PRIME PROTOCOLS

description: This thesis proposes a development of a 3-phase 4-wire prototype smart meter operating at a nominal voltage of 220 volt and current of 10 A. The smart meter is aimed to evaluate application possibility of communication among metering equipment operating in the smart energy grid system based on DLMS-COSEM and PRIME protocols. The smart meter contains a hardware driver to control its energy measurement unit and a firmware developed with C and C++ languages. The firmware is responsible for metering data communication between the smart meter and its data concentrator unit. The smart meter is equipped with Microcontroller STM32L152VBT IC as its processor, STPMC1 as energy calculator, STPMS2 as energy sensors on each phrase the power lines and ST7590 as power line communication modem.
DOI: 10.14457/cu.the.2014.281
title: MODEL PREDICTIVE CONTROL OF A POLYMER EXCHANGE MEMBRANE FUEL CELL

description: This research presents the application of model predictive control (MPC) to control a proton exchange membrane fuel cell (PEMFC). Firstly, the steady state analysis of PEMFC is considered to select its suitable operating conditions based on cell electrical characteristics. Then, the effect of input parameters on cell voltage and temperature is analyzed to investigate the dynamic behavior of PEMFC that is important for control design. It is found that the cell voltage and cell temperature depend on the inlet molar flow rates and temperature of hydrogen and air, and operating current density. To obtain an efficient control system, the control structure design of the PEMFC is considered to specify a good choice of the controlled and manipulated variables. An analysis of the steady-state relative gain array (RGA) is used for pairing of the controlled and manipulated variables. The result shows that the inlet molar flow rates of hydrogen and air are manipulated variables to regulate the cell temperature and partial pressure of hydrogen, respectively. Finally, a model predictive control (MPC) is developed and designed for controlling the cell temperature and partial pressure of hydrogen. Basically, MPC requires the process model used in its control algorithm. The PEMFC model is known to be complicated and involves uncertain parameters. Thus, an offline robust model predictive control (robust MPC) based on a linear time-varying (LTV) model is proposed for PEMFC control. The simulation results show that the robust MPC shows better control performance than conventional MPC because the robust MPC can guarantee robust stability.
DOI: 10.14457/cu.the.2014.282
title: ESTIMATION OF SHEAR WAVE VELOCITY PROFILE FROM EXPLOSION SOURCE

description: This study aimed to propose a simple correlation of shear wave velocity derived from explosion source at five locations located in Mahasarakham, Surin, Udonthani, Suphanburi and Suratthani province. First, the Simple Method (SM) was been a simple technique for shear wave velocity survey and was applied to analyze vibration records of ground surface through the established dispersion curve. Second, the Multichannel Analysis of Surface Wave Method (MASW) has limited in terms of the depth because the shear wave velocity was generated by a sledgehammer. Third, the Downhole Seismic Test (DH) was not often been economically feasible to carry out the shear wave velocity measurements; therefore, the present study was adopted to evaluate shear wave velocity profile from the underground explosion source. The results of SM were in fairly well agreement with those obtained from MASW and DH test. Required parameters were then obtained through the calibration with the result from MASW and DH test. This result is implied that the ground surface vibration record from the deep underground explosion (from seismic survey project) can be properly used to estimate the shear velocity profile of the interested site. This is very important because there are considerable amount of such information especially from the seismic survey projects. The SM method has been for site amplification evaluation, liquefaction potential, seismic hazard study and city planning.
DOI: 10.14457/cu.the.2014.283
title: IMMUNE RESPONSE OF RICE FROG Fejervarya limnocharis (Gravenhorst, 1829) IN HERBICIDE UTILIZED AGRICULTURAL AREA AT WIANG SA DISTRICT, NAN PROVINCE

description: This study aims to investigate potential influence of herbicide utilization on immune responses of the rice frog, Fejervarya limnocharis, living in agricultural area. Frogs were caught from a paddy field with no history of herbicide utilization (reference site) and a paddy field with intensive herbicide utilization (contaminated site) in Nan Province in 2013. After acclimatization, frogs were examined for health, morphometric and gravimetric parameters before subjected to study for a specific immune response (delayed-type hypersensitivity: DTH) and non-specific immune responses (plasma corticosterone level, differential leukocyte count, and numbers of hepatic melanomacrophage and melanomacrophage center (MMC)). The results showed that frogs from the contaminated site had a significantly lower condition factor indicating potential impact on overall health of frog, a significantly higher relative spleen weight indicating potential effect on immune organ, and a significant increase in ovarian weight in a certain season possibly due to effects of herbicide on ovarian growth. Specific immune response as indicated by the DTH response showed the common trend of significantly lower response in frogs from the contaminated site compared to those of the reference site. The results of non-specific immune response showed that there was no significant site-related difference in plasma corticosterone levels. However, neutrophil / lymphocyte (N:L) ratio was markedly reduced in the contaminated site frog during the cool dry season when agricultural activity was present only at the contaminated site. Numbers of melanomacrophage and MMC were markedly elevated in the contaminated site frogs compared to those of the reference site frogs. Significant correlation between numbers of melanomacrophage and MMC vs. atrazine residue was also evident. Overall results suggest that herbicide utilization in agricultural areas could potentially alter immune function of the populated rice frogs.
DOI: 10.14457/cu.the.2014.284
title: REMOVAL OF METAL IONS FROM WASTEWATER USING MODIFIED MAGNETIC PARTICLES CARBON NANOTUBES

description: Lead and zinc could be found in wastewater. In order to treat the wastewater before its release to the environmental source, these heavy metals have to be removed. In this work, a new magnetic adsorbent was prepared by loading the Fe3O4 magnetic particles onto carbon nanotubes through co-precipitation method. The amount of Fe3O4 magnetic particles was varied from 20 to 30%wt. The magnetic composite was further modified with 8-hydroxyquinoline solution. The composites were characterized by SEM, TGA and FT-IR. The results showed that the surface of carbon nanotubes was covered by magnetic particles and 8-hydroxyquinoline. The VSM results showed that the adsorbents with 25% and 30% wt magnetic particles and 8-hydroxyquinoline had the magnetization value of 6.726 emu/g and 8.137 emu/g, respectively and the adsorbents that contain only 25% and 30% wt magnetic particles were 15.819 emu/g and 19.907 emu/g, respectively. The composite of MWCNT and magnetic particles with 8-HQ and without 8-HQ (MWCNT-Mag and MWCNT-Mag-8-HQ) were used as adsorbents for Pb(II) and Zn(II) ions adsorption. The time for the adsorption process to reach the equilibrium was 60 minutes and the suitable pH value for metal ions adsorption was pH 5. The adsorption kinetics followed pseudo-second order model and the adsorption equilibrium could be described by Langmuir isotherm. The maximum capacity of MWCNT-30Mag and MWCNT-30Mag-8-HQ in Pb(II) adsorption was 32.26 mg/g and 48.78, respectively. On the other hand, the maximum capacity of MWCNT-Mag and MWCNT-Mag-8-HQ in Zn(II) adsorption was 12.22 and 18.52 mg/g , respectively
DOI: 10.14457/cu.the.2014.285
title: APPLICATION OF ELECTRICAL RESISTIVITY METHOD COMBINED WITH TIME DOMAIN ELECTROMAGNETIC DATA FOR CONCEPTUAL HYDROGEOLOGICAL MODELING IN CHANGWAT KAMPHAENGPHET

description: Kamphaengphet is a part of upper Chao Phraya basin of Thailand. The rapid growth of agriculture results in significantly growing water demand. Reliance on surface water only causes water shortage. Groundwater resources are great alternatives to satisfy such a growing water demand, which solves the water shortage in dry season efficiency. Especially in the study area has groundwater stored in consolidated rocks that are difficult investigated. The popular methodology for groundwater survey is electrical geophysical technique. The vertical electrical sounding technique lacks data continuity. Later, the exploration has been relying on the multi–electrode system, resulting in accurate surveys and continuity resistivity data. Combining airborne time – domain electromagnetic data with electrical resistivity data will help investigate aquifers characteristics and pinpoint drilling well location accurately. Most of the study area overlain by residual soils and some area has already been changed to laterite that are underlain by shallow Silurian – Devonian phyllite which has resistivity higher than 200 ohm-meters. The study area shows significant weak zones in Silurian - Devonian rocks aquifers that are weathered phyllite. The fractures or fault zone is aligned in northern-southern directions. The weak zone has resistivity range from 10 to 50 ohm-meters which is the primary aquifer of the study area. This zone has high groundwater potential and groundwater well can be developed. Primary groundwater regional flow is from the northern high mountain to southern basin direction. The flow pattern in this consolidated aquifers is controlled by fractures or faults in rock formation.
DOI: 10.14457/cu.the.2014.286
title: COMPATIBILIZATION OF POLY(LACTIC ACID)/NATURAL RUBBER BLENDS USING NATURAL RUBBER-GRAFT-POLY(LACTIC ACID)

description: Poly(lactic acid) (PLA) or polylactide is bioplastics produced from agricultural products, which are renewed and also bio-degraded by enzyme. PLA has high strength, but it has the brittleness and low impact strength, which limit its applications. Thus, several previous research works studied the properties improvement of PLA by blending with elastomers such as natural rubber (NR) with excellent elastic property to reduce PLA’s brittleness and to increase its impact strength. However, the direct blending of PLA, which is the polyester and NR with low polarity leads the incompatible blend resulting in its poor mechanical properties. Thus, the aim of this research was to use the NR grafted with PLA (NR-g-PLA, NR-PLA) as the compatibilizer for PLA/NR blends. There were 2 steps to prepare NR-PLA compatibilizer. Firstly, NR was functionalized by maleic anhydride (MAH) (NR-MAH) to increase the polarity of NR. Then, NR-MAH was grafted with PLA via esterification. The effects of grafting parameters in the esterification step on the %grafting PLA were investigated. The result showed that the increase in the MAH contents (5-20 phr) led the higher %grafted PLA content in NR-MAH from 27.5 to 46.4 wt%. The suitable condition to increase the %grafted PLA was 1/1 (w/w) NR-MAH/PLA and 0.05 M 4-dimethylaminopyridine (DMAP) at 140 oC for 16 h. Moreover, the addition of 5 wt% NR-PLA (%grafted PLA = 2.66) on the PLA/NR blends (80/20 (w/w)) increased the Izod impact strength to 62.7 J/m higher than neat PLA (22.8 J/m). The compatibility of PLA/NR blends with NR-PLA compatibilizer was also improved by morphology and thermal properties. For the bio-degradation of the blends via hydrolysis and enzyme proteinase K, it was shown that the degradation rate of PLA/NR blends with/without addition of NR-PLA compatibilizer was slightly decreased from the neat PLA.