cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2012.630
title: Plantwide control structure design of the methoxy-methyl-heptane process

description: The design of plantwide control structure for the methoxy-methyl-heptane process using Wongsri’s design procedure is studied. The eight stepsof the design procedure focus on plantwide level designwhich is establishing a fixture plantand thermal and material disturbance managements for quality control. The process involves the reaction of methanol with 2-methyl-1-heptene to form 2-methoxy-2-methylheptane. The flowsheet features a continuous stirred tank reactor, three distillation columns, and one recycle stream. The combined feed of fresh and recycled 2-methyl-1-heptene is regulated and is ratioed to the fresh methanol. 2-methyl-1-heptene disturbance is pushed away via the distillate of the second column and recycled to maintain 2-methoxy-2-methylheptane purity in the third column. All components are handled at their identified quantifiers. The designed plantwide control structure performance is compared with the Luyben’s design.
DOI: 10.14457/cu.the.2012.631
title: Soil washing potential and characteristics of biosurfactants from bacillus sp. GY19

description: Biosurfactants, produced by various microorganisms, gained several interests during the past decades. This study aims to take a closer look at the biosurfactant production by Bacillus sp. GY19, isolated from planted soil using renewable substrates (molasses, bottom glycerol) and pure glycerol. Molasses and glycerol can be effectively used as substrates for biosurfactant production by this strain, as they reduce surface tensions of culture media up to 31% (29.5 mN/m) and 55% (29.7 mN/m) compared to the control, respectively. Colorimetric tests to quantify the content of lipid, protein and carbohydrates (sulpho-phospho-vanillin-test, Bradford-test and phenol-sulfuric acid test, respectively) revealed the produced biosurfactant as one of lipopeptide type, which could be confirmed by NMR. Bacillus sp. GY19 has been tested for biosurfactant producing genes by Polymerase Chain Reaction and found to contain genes responsible for fengycin, plipastatin and surfactin production. Furthermore, soil washing batch experiments, using three types of soil spiked with crude oil, showed potential of an application of this biosurfactant as a soil washing agent, depending on the type of soil. Solutions containing 2 g/l biosurfactant using 3% pure glycerol as substrate could remove 91% of crude oil from a sandy clay loam soil. Additionally, germination tests with cucumber, tomato and lettuce seeds were conducted with aqueous solutions of the crude biosurfactant extract, showing no inhibition of germination to all tested plants. Furthermore, no microbial inhibition or bactericidal effects could be determined of the biosurfactant solutions, leading to the conclusion that the extracted crude biosurfactant solutions, using molasses and pure glycerol as substrates, are not toxic to the environment. Hence, this study showed potential utilization of lipopeptide from Bacillus sp. GY19 for remediation of crude oil contaminated sites
DOI: 10.14457/cu.the.2012.632
title: The gap between policy and practice of public participation in Cambodia : a case study of the Stung Hav coal fired power plant in Sihanoukville Province

description: In democratic countries around the world, public should have the ability to question or able to change the government decisions that they do not agree. However, democratic country in principle like Cambodia does not allow the strong criticism of government. The strong criticism is resulted in physical threats to those who openly express their ideas. Aside of this political matter, the inadequate of legal framework for public participation is another challenge to freedom of expression. With the expectation to produce its own electricity, Cambodian government has introduced the first Coal Fired Power Plant located at village 2 of Kampenh commune, Stung Hav district of Preah Sihanoukville province. The project will import coal from Indonesia and Vietnam and operate with two unit of 50-52 MW. The total generating capacity will be 100-104 MW that expect to start its operation by the end of 2013. The project is currently under construction stage. According to the problem above, this thesis was conducted in order to determine whether there is a gap between public participation in policy and practice in Cambodia particularly in the case of Stung Hav Coal Fired Power Plant. Moreover, this study had employed both qualitative and quantitative research methodology. The primary data was collected from in-depth interviews with different key informants; whereas, the secondary data was collected on international standards on public participation, Cambodian legal frameworks related to public participation. In evaluating the practices of public participation in the Stung Hav CFPP to Cambodian existing legal frameworks, the research finds that there were a limited number of participants, limitations on freedom of expression, and passive public participation. The evaluation of the international best practices for public participation revealed similar results: the stakeholder’s suggestions were not influential, there were a limited number of participants, and affected people had limited access to information. In terms of community empowerment, NGOs played an important facilitation role empowering particular community members, but not the whole community. The absence of clear legal frameworks makes it difficult to demand accountability from the implementing agency. The absence of clear guideline is a weakness of legal framework that cause negative impacts on local community as well as nature and environment but benefit project developers, thus illustrating the gap between policy and implementation. So it can be concluded that in the case of the Stung Hav CFPP was not employed an adequate process of public participation that meets the requirements of either Cambodian laws or international best practices in public participation.
DOI: 10.14457/cu.the.2012.633
title: An analysis of English language learning needs and problems of underprivilged children in a slum area in Bangkok metropolis

description: For underprivileged children living in a slum area, education seems to be the only tool that guarantees a better life when they grow up. The present study aimed at investigating the needs and problems in English language learning of underprivileged children in the Klong Toey slum, the largest slum in Bangkok Metropolis. Data were collected by means of questionnaires and interviews from 100 underprivileged children, volunteer teachers, and slum community members. The interview session was used to collect more in-depth information in English language learning needs and problems in a slum area. The study findings have revealed that children in the slum area have realized the significance of English and that they are interested in learning English through games, songs, videos, and TV programs. They also enjoy learning English through with technological media and materials. However, the teachers feel that these children need more motivation in the classroom, which could be increased with interesting activities and fun atmosphere that support their communicative skill development. Furthermore, community member, despite their understanding of the significance of the English language, admitted that their living conditions have become a major hindrance that prevents them from giving more support to these underprivileged children’s learning. Language policy planners and educators can make use of such findings to revise existing English curricula to better suit context-specific needs and problems of underprivileged children in a slum area.
DOI: 10.14457/cu.the.2012.634
title: Effect of nitrilotriacetic acid (NTA) and ethylenediaminetetraacetic acid (EDTA) on arsenic uptake from contaminated soil by Mmimosa pudica Ll.

description: This study investigated the arsenic (As) accumulation in the underground part (root) and aboveground parts (stem and leaves) of Mimosa pudica L. and the effects of chelating agents, NTA and EDTA for enhancing As uptake by the plant. Uncontaminated soil and plants were used in this experiment. A preliminary study was also conducted to determine the phytotoxicity using added disodium hydrogen arsenate (Na2HAsO4.7H2O) at different concentrations of As (5, 10, 20, 40, 80, 120, 160, 200, 300 and 400 mg/kg soil) and three doses of NTA and EDTA (50, 100 and 200 mg/kg soil). Then plants were grown on prepared soil and monitored for a month. The preliminary results showed that plants could grow healthy in As contaminated soil up to 10 mg/kg soil while higher concentrations showed phytotoxicity in the plant. The symptoms varied including dry and curly in plant leaves and stems. NTA and EDTA did not produce phytotoxicity during plant growth. For the main experimental procedure, 5 mg As/kg soil was added into uncontaminated soil pots and left for three months. Then one seedling of Mimosa pudica L. per pot was grown in As contaminated soil and followed by adding three doses of NTA or EDTA (50, 100 and 200 mg/kg soil) separately. Soil and plant samples were collected every 30 days for a 120 day period and analyzed for As concentration. The results showed that As accumulation in the underground part of the plant (root) was significantly higher than in the aboveground parts (stem and leaves) (P0.05). The maximum As accumulation in the root after 120 days was at 29.71 mg As/kg plant while the combined concentration in the stem and leaves was only 6.32 mg As/kg plant. The average As accumulations in all parts of the plant during four months were in the range of 2.71 - 36.03 mg As/kg plant and set EDTA 100 mg/kg soil showed the highest As accumulation in Mimosa pudica L. Overall, at the same harvesting times and application doses of chelating agents, EDTA has more efficiency for enhancing As uptake by this plant than NTA. Moreover, the synchrotron µ-X-ray fluorescence spectroscopy (Beamline 6b) analysis provided an unexpected result on the distribution of As in the plant caused by the limitation of radiation beam line. However, this research did not study the chemical reactions between As and chelating agents. Therefore, for future studies it is recommended to investigate the detail in molecular level and study more on the difference between the application of fertilizers and without fertilizers.
DOI: 10.14457/cu.the.2012.635
title: Cumene hydroperoxide treatment by fenton and electro-fenton process

description: This research investigated the feasibility of treating phenol-production wastewater by treatment combination among Fenton, electro-Fenton and aerobic biological processes. Wastewater used in this study was obtained from a phenol-production plant and found to be highly toxic and refractory. Major pollutant was cumene hydroperoxide within the range of 250-550 mg/l with the pH and COD of 12-13 and 3,000-6,000 mg/l, respectively. It was found that cumene hydroperoxide could rapidly react with ferrous ion to form acetophenone and was easily biodegraded. This implies that the toxicity and biological stability of this wastewater are derived from other pollutants rather than cumene hydroperoxide. As a result, this research was focused on the removal of refractory organic pollutants in term of COD. Optimum conditions for DOD removal of Fenton process were at pH 3.0 and the hydrogen peroxide to ferrous molar ratio of 1:0.2. Removal efficiency increased with increasing Fenton’s reagent concentrations; however, the COD of the Fenton-treated effluent were in between 700-1,000 mg/l which were still much higher than the industrial effluent standard of 120 mg/l. Electric current discharge to transform the process to electro-Fenton could not significantly improve the COD removal. Nonetheless, it could obviously increase the BOD to COD ratio. The BOD to COD ratios of the raw wastewater, Fenton-treated and electro-Fenton treated effluents were 0.4, 0.5, and 0.8, respectively. As a result, the effluent from electro-Fenton process had high potential to be further treated by aerobic biological process. Biodegradation study revealed that the activated sludge SBR system could reduce the COD to be lower than 40 mg/l with the hydraulic retention time of 2 days. Thus, the effective integrated treatment scheme for phenol-production wastewater is the electro-Fenton process followed by aerobic biodegradation process.
DOI: 10.14457/cu.the.2012.636
title: Synthesis and characterization of asymmetric diamine for transparent polyimide film

description: Polyimide is widely used in microelectronic applications because there’re good mechanical, electrical and thermal properties. However, most polyimides colour are yellow-orange that limiting to use in optical application. The colour in polyimide occurs from electron charge transfer between amine groups and benzene ring. To reduce it, the asymmetric diamine was induced to polymer backbone. In this study, aiming to synthesis new asymmetric diamines by apply the Williamson’s ether synthesis and hydrogenation reaction. For 1st Diamine monomer, the sample from conversion of 2,2 Dinitrobiphenyl to 2,2’ Diaminobiphenyl was successfully prepared by hydrogenation reaction in hydrogen atmosphere. For 2nd Diamine monomer, the reactant including 2-Nitrophenol and 4-Chloro-3-nitrobenzotrifluoride was reacted by Williamson’s ether synthesis reaction to create asymmetric dinitro, then converse the dinitro to diamine as 2-(2-aminophenoxy)-5-(trifluoromethyl)aniline by hydrogenation reaction. Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared (FTIR) spectrometers then examined the product structureandthey were confirmed. The transparent film was made by thermal imidization, PI-1 and PI-2 were created from copolymer of 1st Diamine: 6F-Diamin: 6FDA and 2nd Diamine: 6FDiamine: 6FDA, respectively. The obtained films were characterized by Thermogravimetric analysis (TGA), Ultraviolet-Visible spectrophotometer (UV-vis) and solubility test. The target of cut off wavelength below 350 nm can be obtained. However, the synthesized film could not separate from glass substrate because of it’s brittle.
DOI: 10.17632/nnb533964z.2
title: Hawaii Map Series of Sea Level Rise Inundation by 2050 for the Ocean Hazards Database

description: This database consists of a series of maps showing estimated inundation of sea-level rise (SLR) at the year 2050 on Hawaiian Islands. Individual maps show inundation across mile-long sections of Hawaii state routes on the islands of Hawaii, Maui, Molokai, Oahu and Kauai previously identified for their vulnerability to the effects of climate change as part of the Statewide Coastal Highways Project Report. Mileposts are identified by Brandes et al. (2019). State of Hawaii Department of Transportation (HDOT) state routes and county street centerline datasets are acquired from HDOT (2017) and HOLIS, C&CH (2017). Shoreline datasets are provided by NGS (2017). Future SLR projections by 2050 are based on the report of Sweet et al. (2017) with respect to mean higher high water (MHHW). Please read ‘Description-Map of Sea Level Rise Inundation by 2050.docx’ for detailed information. References Brandes, H., Doygun, O., Rossi, C., Francis, O., Yang, L., and Togia, H., (2019) Coastal Road Exposure Susceptibility Index (CRESI) for the State of Hawaii Statewide Coastal Highway Program Report. Department of Civil and Environmental Engineering, University of Hawai'i at Manoa, doi: 10.17632/frr3fsx3j6.2. HDOT (State of Hawaii Department of Transportation). “StateRoutes_SDOT” [shapefile]. Scale Not Given. State Routes. Hawaii Statewide GIS Program. Retrieved from http://files.hawaii.gov/dbedt/op/gis/data/StateAndCountyRoutes.shp.zip (December 2017). HOLIS, C&CH (Honolulu Land Information System, City and County of Honolulu). “Oah_streets” [shapefile]. Scale Not Given. Oahu Street Centerlines. Hawaii Statewide GIS Program. Retrieved from http://geoportal.hawaii.gov/datasets/roads-honolulu-county (December 2017). NGS (National Geodetic Survey) (2017). National Oceanic and Atmospheric Administration (NOAA) Continually Updated Shoreline Product (CUSP). Retrieved from https://www.ngs.noaa.gov/CUSP/ (October 2017). Sweet, W. V., Kopp, R. E., Weaver, C. P., Obeysekera, J., Horton, R. M., Thieler, E. R., and Chris, Z. (2017). Global and Regional Sea Level Rise Scenarios for the for the United States. Silver Spring, MD.
DOI: 10.14457/cu.the.2012.637
title: Discourse on the Khmers in contemporary Thai fiction

description: Motivated by the century-long up and down relations of Thailand and Cambodia, this study aims at analyzing the Thai ideology about the Khmers that underlie the images of the Khmers conveyed by various linguistic strategies in contemporary Thai fiction. The data were taken from randomly selected fiction from 1960 to 2011, the content of which is related to the Khmers. The result of the study reveals that there are ten types of linguistic strategies employed by the writers, e.g. lexical selection, epithet, metaphor/simile, allusion, presupposition, pronoun, negative sentence, adversative passive, citation and narrative techniques, to construct the images of and generate the ideologies about the Khmers. The images of the Khmer found in this study are divided into four groups: (1) Khom or the ancient Khmer: that Khom was powerful, that Khom is not the Khmers, and that Khom is mystical; (2) the Khmer leaders and soldiers: that the Khmer leaders and soldiers are corrupt, tyrannical and brutal, (3) the Khmers in general: that the Khmers in general are inferior to the Thais, that the Khmers in general tend to trigger problems and cause harm to the Thais, and that the Khmers in general are pitiful; and, (4) the Khmer royal family: that the members of Khmer royal family are graceful and respectable. The ideologies derived from these images are: (1) in- and out-group polarization as “we” and “others”, (2) Thai assumption about the greatness of Khom and the weakness of the ordinary Khmers in the present, except Khmer royal family, and (3) presumed Thai benevolence toward the pitiful Khmers.
DOI: 10.14457/cu.the.2012.638
title: Human health risk assessment related to dermal exposure of chlorpyrifos in rice-growing farmers at Nakhon Nayok Province, Thailand

description: Rice-growing farmers in SisaKrabue sub-district, Ongkharak district, NakhonNayok province, Thailand was studied health risk assessment of chlorpyrifos exposure through dermal route. This study had 35 participants who related with pesticide application and most of them were male. In this study used fluorescent tracer to reveal pesticide contaminated on body skin. The result showed the frequency of fluorescent tracer was largely found on lower (97.14%) and upper legs (97.14%)of farmers and rarely found on their chest under clothes (45.71%) and the greatest number of percent fluorescent scoring was lower (72.38%) and upper legs (62.86%) and the smallest percent of fluorescent scoring was chest under clothes (19.05%) that was same as percent frequency of pesticide residues on seven parts of farmers' body. The farmers were patched with cotton gauze on seven points of farmers’ body. Both of male and female lower leg were the part of body where was the highest concentration of chlorpyrifos (261.64 and 164.64 mg/kg of gauze, orderly). The comparison of chlorpyrifos concentration on seven parts of body between male and female,There was not a statistical difference (Mann-Whitney U test; p&gt;0.05). Moreover, There was significantly correlation between chlorpyrifos residues concentration and fluorescent scoring on chest on clothes, chest under clothes, upper leg, lower leg, and whole body (Spearman’s rho; p&lt;0.05). ADD on seven parts of male and female farmers were31.72x10-4, 193.32x10-4, 5.38x10-4, 190.48x10-4, 170.47x10-4, 465.91x10-4, and 43.04x10-4mg/kg-day, orderly. Hazard Quotient (HQ) at mean and 95th percentile level on seven parts of body of both male and female was greater than acceptable level (HQ &gt;1). This can be interpreted that rice-growing farmers in this area received adverse health risk from skin exposure to chlorpyrifos. In conclusion, safety risk management in term of pesticide use and practices should be conducted in SisaKrabue area to minimize exposure from chlorpyrifos usage via dermal route.
DOI: 10.14457/cu.the.2012.639
title: Synthesis and characterization of ultra-thick negative photosensitive polyimide

description: Photosensitive polyimide (PSPI) is one of the great interesting engineering polymers, especially for microelectronic industry. We studies and optimized the synthesis conditions for a PSPI that can be used as lithography material. Negative photosensitive polyimide (NPSPI) have been synthesized by reaction of 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) with hexamethylenediamine (HMDA) and 4,4′-oxydianiline (ODA) at stoichiometric dianhydride/diamine ratio of 100:30:70 in N-methyl-2-pyrrolidinone (NMP) solutions by using solution condensation polymerization at room temperature and further imidization at 250°C. The photoinitiator and photo precursor were bis(2,4,6-trimethyl benzoyl) phenylphosphine oxide (Irgacure-819) and 2-hydroxyethyl methacrylate (HEMA), respectively. In this study, we used photosensitive polyimide for insulation layer that created as cover film with the thickness of cover film approximately controlled at 12.5 micron, thus the thickness of cover film was called, as “Ultra-thick” and the area opening of NPSPI films are 4 mm2 was prepared. The silica domains are responsible for reducing the volume shrinkage of NPSPI films after the curing process by synthesis of negative photosensitive polyimide/silica (POSS) hybrid films. The synthesized NPSPI and NPSPI/silica hybrid films were characterized by FTIR and 1H-NMR while their morphologies were evaluated by Optical and Confocal Microscope. The thermal stability of the polyimide films was analyzed by TGA and their dielectric constants were confirmed by LCR meter. These results indicated that the prepared NPSPI/silica hybrid films would have the high potential for applications in electrical devices.
DOI: 10.17632/34755jpzw6.2
title: Hawaii Map Series of Tsunami Inundation for the Ocean Hazards Database

description: This database consists of a series of maps showing tsunami inundation based on historical events (1946 Aleutian, 1952 Kamchatka, 1957 Aleutian, 1960 Chile, and 1964 Alaska tsunamis) and hypothetical events (two great Aleutian earthquakes with moment magnitude (Mw) 9.3 and 9.6 as potential sources). Individual maps show inundation across mile-long sections of Hawaii state routes on the islands of Hawaii, Maui, Molokai, Oahu and Kauai previously identified for their vulnerability to the effects of climate change as part of the Statewide Coastal Highways Project Report. Mileposts are identified by Brandes et al. (2019). State of Hawaii Department of Transportation (HDOT) state routes and county street centerline datasets are acquired from HDOT (2017) and HOLIS, C&CH (2017). Shoreline datasets are provided by NGS (2017). Please read ‘Description-Map of Tsunami Inundation.docx’ for detailed information. References Brandes, H., Doygun, O., Rossi, C., Francis, O., Yang, L., and Togia, H., (2019) Coastal Road Exposure Susceptibility Index (CRESI) for the State of Hawaii Statewide Coastal Highway Program Report. Department of Civil and Environmental Engineering, University of Hawai'i at Manoa, doi: 10.17632/frr3fsx3j6.2. HDOT (State of Hawaii Department of Transportation). “StateRoutes_SDOT” [shapefile]. Scale Not Given. State Routes. Hawaii Statewide GIS Program. Retrieved from http://files.hawaii.gov/dbedt/op/gis/data/StateAndCountyRoutes.shp.zip (December 2017). HOLIS, C&CH (Honolulu Land Information System, City and County of Honolulu). “Oah_streets” [shapefile]. Scale Not Given. Oahu Street Centerlines. Hawaii Statewide GIS Program. Retrieved from http://geoportal.hawaii.gov/datasets/roads-honolulu-county (December 2017). NGS (National Geodetic Survey) (2017). National Oceanic and Atmospheric Administration (NOAA) Continually Updated Shoreline Product (CUSP). Retrieved from https://www.ngs.noaa.gov/CUSP/ (October 2017).