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Application Of Battery Energy Storage System For Frequency Regulation Of Mae Hong Son Microgrid, Arnon Teawnarong
Application Of Battery Energy Storage System For Frequency Regulation Of Mae Hong Son Microgrid, Arnon Teawnarong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Mae Hong Son microgrid in an isolated mode has low inertia. Therefore, when a disturbance occurs, the system frequency is subjected to a large deviation, which may lead to a blackout. The installation of a battery energy storage system (BESS) will improve the frequency response performance of the microgrid system in both islanding and grid-connected modes. The objective of this thesis is to investigate and compare BESS control methods for providing primary and secondary frequency response. The results show that the control of BESS for providing primary frequency response using virtual droop and virtual inertia approaches can reduce the frequency …
Strategic Supplier Selection:The Case Of International Food Trading Company, Natchanok Paramaporn
Strategic Supplier Selection:The Case Of International Food Trading Company, Natchanok Paramaporn
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objective of the research project is to develop strategic supplier selection system for an international food trading company using the Analytic Hierarchy Process (AHP). The products involved are canned food for worldwide export. The decision makers consist of a president and two marketing managers. The chosen decision criteria listed by weight of important are ‘Export Capability’ (54%), ’Pricing Policy’ (28%), ‘Technological Catch-up’ (10%), ‘Ethical Practices’ (5%), and ‘Environmental Management’ (3%). The sub-criteria chosen are ‘Number of Food Safety Certificate’ (54%), ‘Net Selling Price’ (23%), ‘Automation in Production Process’ (8%), ‘Payment Terms’ (5%), ‘Worker’s Safety and Health’ (4%), ‘Adverse Weather …
Improvement Of Inventory Policy For Furniture Fittings Manufacturer, Natchaya Suntipiromkul
Improvement Of Inventory Policy For Furniture Fittings Manufacturer, Natchaya Suntipiromkul
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objective of this research is to improve the management of inventory in a furniture fittings manufacturer so that shortage and overstock could be reduced. Based on our initial investigations, such inventory problems were caused not only by inefficient production planning but also a lack of inventory control system that linked those plans with the stocks of raw material required. To better address the issues, two different models have been therefore proposed, namely more accurate demand forecasting models for products with different demand patterns and inventory control models for raw materials of those products. Regarding the development of more accurate …
Big Data Analytics For Improving Customer Win-Back Rate In Townhome Segment, Warot Lilahajiva
Big Data Analytics For Improving Customer Win-Back Rate In Townhome Segment, Warot Lilahajiva
Chulalongkorn University Theses and Dissertations (Chula ETD)
Thailand’s real-estate market is now facing with negative growth, where most developers are encountered with challenges in generating satisfactory revenue, particularly from new customers. In order to improve the revenue stream, customer win-back approach that focuses on current customers in the sales funnel and re-engages them by offering more attractive residential projects is therefore initiated. In particular, we focus on the development of predictive analytics model that potentially increases customer win-back rate by exploring the current databases, identifying significance for win-back (based on past performance), and testing the resulting predictions via several machine learning algorithms. The proposed method returns a …
Co-Creating Built Environment For Sustainable Development: A Case Study Of Ban Moh, Mahasarakham Province, Chainun Prompen
Co-Creating Built Environment For Sustainable Development: A Case Study Of Ban Moh, Mahasarakham Province, Chainun Prompen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Co-creation has been used widely in many fields, including innovation design, service design, and district development. In Thailand, many development projects apply co-creation as an approach to development. However, the academic knowledge about co-creating built environment in Thailand is limited and remains unclear. Therefore, this study aims to understand the processes and practices of co-creating built environment in the context of Thailand through the description and analysis of cases. The four case studies described here include the Chantaboon riverfront community in Chantaburi Province, Ban Pred Nai community in Trat Province, Ban Mun Kong project in Samut Prakan Province, and Pru …
Policy For Sustainable Informal Transport - A Case Study Of Feeder Services In Bangkok, Thailand, Chutaporn Amrapala
Policy For Sustainable Informal Transport - A Case Study Of Feeder Services In Bangkok, Thailand, Chutaporn Amrapala
Chulalongkorn University Theses and Dissertations (Chula ETD)
One informal public transport service in Bangkok is Silor (SR), given the meaning in Thai as four-wheeler. SR facilitates urban mobility both in terms of major travel mode and feeder bus and mass transit lines in the city. This research aims to investigate service characteristics and challenges of SR service, identify factors affecting the use and non-use of SR, explore travel behavior and attitudes to determine service delivery gaps in order to propose policy recommendations for the better functioning of SR service. Interviews are conducted through questionnaire survey to collect data from supply side, including drivers and regulators, and demand …
Evaluation Of Carbon Dioxide And Nitrate Utilization From Recirculating Aquaculture System For Microalgal Production, Kittikoon Sucunthowong
Evaluation Of Carbon Dioxide And Nitrate Utilization From Recirculating Aquaculture System For Microalgal Production, Kittikoon Sucunthowong
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study evaluated carbon dioxide and nitrate utilization from tilapia cultivating system by means of microalgal cultivation. The first part of this study evaluated the feasibility of using nitrate-rich effluent from aquaculture to cultivate Scenedesmus armatus in comparison with the cultivation using BG-11 media. Comparable biomass productivity and pigment content of S. armatus from the cultivation indicated that nitrate-rich effluent from aquaculture could be used as substitute for a more expensive BG-11 growth media. The second part of this study evaluated the feasibility of utilizing carbon dioxide concentrated air from roughly 3 kg/m3 tilapia cultured tank to grow S. armatus. …
A Neural Network-Based Method For Solving A Dynamic Investment And Consumption Problem With Transaction Costs And Stochastic Volatility, Kittipong Noonoi
A Neural Network-Based Method For Solving A Dynamic Investment And Consumption Problem With Transaction Costs And Stochastic Volatility, Kittipong Noonoi
Chulalongkorn University Theses and Dissertations (Chula ETD)
Optimal investment and consumption problem with proportional transaction costs known as Davis \& Norman problem is a challenging portfolio free-boundary problem to solve. According to the HJB equation, see Davis and Norman (1990), there are three optimal regions i.e. no-trade region, buy region, and sell region in which different actions are prescribed. However, the two boundaries separating the three regions are unknown and it is crucial to discover them in order to obtain the optimal policy. Nonetheless, under a special class of model in which the excess return of stock is assumed to be positively linear in variance reflecting the …
Development Of Composite Film Coating For Freeze-Dried Fruit Slices, Nichayarach Invichian
Development Of Composite Film Coating For Freeze-Dried Fruit Slices, Nichayarach Invichian
Chulalongkorn University Theses and Dissertations (Chula ETD)
Edible film coating on food before freeze-drying process can be used for food preservation, especially in heat-sensitive food such as fruits and vegetables. Previous studies have been reported that trehalose had the cryoprotective effect and unique properties such as non-reducing sugar and low hygroscopic. However, no research has been conducted on the use of trehalose as film coatings. Therefore, this study aimed to develop a composite film consisting of alginate and trehalose and to evaluate physical properties of freeze-dried fruit slices coated with a composite film. The experiment was designed to prepare a composite film consisting of various concentrations of …
Geological And Mineralogical Characteristics Of Pilok And Takua Pit Thong Tin-Tungsten Deposits, Western Thailand, Karn Phountong
Geological And Mineralogical Characteristics Of Pilok And Takua Pit Thong Tin-Tungsten Deposits, Western Thailand, Karn Phountong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Pilok and Takua Pit Thong mine were one of tin-tungsten mines associated with the Western Granitoid Belt. Despite the very poor condition of the outcrop, petrographic and geochemical studies reveal two granitoid units: porphyritic granite and equigranular granite, which show similar petrography characteristics except for tourmaline that appears only in equigranular granite, and their textures. Based on whole-rock geochemistry, porphyritic granite is ferroan to magnesian, alkalic, peraluminous granite whereas equigranular granite is ferroan to magnesian, alkali to alkali-calcic, peraluminous granite. Both granites show S-type affinity. The REE patterns show enrichment in LILE (e.g. K, Rb) and HFSE (e.g. Nb, Ta). …
Petrography And Geochemistry Of Volcanic Rocks In Khao Sam Sip Area, Sa Kaeo Province, Maythira Sriwichai
Petrography And Geochemistry Of Volcanic Rocks In Khao Sam Sip Area, Sa Kaeo Province, Maythira Sriwichai
Chulalongkorn University Theses and Dissertations (Chula ETD)
The volcanic rocks at Khao Sam Sip, Sa Kaeo province is part of the Loei-Phetchabun-Sa Kaeo Volcanic Belt. Based on field observation, petrographic and geochemical studies, the rocks in the study area can be divided into four rock units namely, 1) Basalt-andesite unit, 2) Polymictic andesitic unit, 3) Epiclastic unit, and 4) Clastic unit. Unit 1 is the lowest unit in sequence consisting of olivine-pyroxene-plagioclase basalt, pyroxene basalt, hornblende-plagioclase andesite, and plagioclase andesite. Unit 2 consists of polymictic andesitic breccia and polymictic andesitic sandstone. Unit 3 is epiclastic unit comprising of crystal-lithic sandstone and polymictic conglomerate. Units 4 includes fine-grained …
Geology And Mineralization Characteristics Of Epithermal Gold, Suwan Prospect, Changwat Phitsanulok, Tanad Soisa
Geology And Mineralization Characteristics Of Epithermal Gold, Suwan Prospect, Changwat Phitsanulok, Tanad Soisa
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Suwan prospect is located about 6 km northwest of the Chatree gold mine in Phitsanulok province, central Thailand. Gold-silver mineralization occurs as veins and stockworks hosted in volcaniclastic and volcanogenic-sedimentary rocks of Late Permian- Early Triassic age which is classified as a low sulfidation epithermal deposit base on mineralization texture, alteration pattern and sulfide mineral assemblages. From top to bottom, the hosted volcanic succession can be divided into 3 units, namely 1) Felsic volcanic unit (Unit 1), 2) Volcanogenic-sedimentary unit (Unit 2), and 3) Porphyritic andesite unit (Unit 3). Unit 1 consists predominantly of quartz-rich fiamme breccia, lithic-rich fiamme …
Organic Geochemical Characteristics Of Coal Deposits In Lampang Province, Patthapong Chaiseanwang
Organic Geochemical Characteristics Of Coal Deposits In Lampang Province, Patthapong Chaiseanwang
Chulalongkorn University Theses and Dissertations (Chula ETD)
ถ่านหินและหินตะกอนจำนวน 31 ตัวอย่างจากแหล่งถ่านหินแม่ตีบและแหล่งถ่านหินแม่ทานที่ตั้งอยู่ในจังหวัดลำปางทางตอนเหนือของประเทศไทยถูกนำมาศึกษาลักษณะเฉพาะทางธรณีเคมีอินทรีย์ (Organic geochemistry) ผลจากการวิเคราะห์ปริมาณสารอินทรีย์ทั้งหมด (Total organic carbon) พบว่าตัวอย่างถ่านหินจากแหล่งแม่ตีบมีค่าระหว่าง 30.12 - 73.71 wt. % และสูงกว่าตัวอย่างถ่านหินของแหล่งแม่ทานซึ่งมีค่าระหว่าง 23.48 - 52.50 wt. % หินดินดานจากทั้งสองแหล่งมีค่าใกล้เคียงกันระหว่าง 4.82 - 19.49 wt. % ในแหล่งแม่ตีบ และ 14.00 - 24.87 wt. % ในแหล่งแม่ทาน ค่าที่น้อยที่สุดของปริมาณสารอินทรีย์ทั้งหมดปรากฏในตัวอย่างหินโคลนซึ่งมีค่าระหว่าง 0.88 – 4.92 wt. % ในแหล่งแม่ตีบ และค่าระหว่าง 0.59 – 5.98 wt. % การวิเคราะห์ปริมาณสารอินทรีย์ที่สกัดได้ (Extractable organic matter) ในตัวอย่างหินของแหล่งแม่ตีบมีค่าระหว่าง 1,277 - 9,764 ppm ในขณะที่ตัวอย่างหินของแหล่งแม่ทานมีค่ามากกว่าโดยอยู่ระหว่าง 1,256-16,421 ppm จากข้อมูลข้างต้นทั้งสองแหล่งมีศักยภาพการเป็นชั้นหินต้นกำเนิดของแหล่งปิโตรเลียมอยู่ในเกณฑ์ดีถึงดีเยี่ยมยกเว้นหินโคลนบางตัวอย่าง ข้อมูลลักษณะเฉพาะทางธรณีเคมีอินทรีย์ศึกษาจากแก๊สโครมาโตแกรม (Gas chromatogram) ได้มาจากการวิเคราะห์โดยใช้เครื่องมือแก๊สโครมาโตกราฟี-แมสสเปกโตมิเตอร์ (Gas chromatography-mass spectrometer) ซึ่งให้ข้อมูลของตัวชี้วัดทางชีวภาพ (Biomarker and non-biomarker) ที่มีประโยชน์ในการตีความทั้งระดับความพร้อมสมบูรณ์ (Maturity) ชนิดของอินทรีย์วัตถุ (Organic matter input) และสภาพแวดล้อมการสะสมตัวในอดีต (Depositional environment) ในการศึกษานี้ถ่านหินมีระดับความพร้อมสมบูรณ์เทียบเคียงกับระดับถ่านหิน (coal rank) อยู่ในระดับลิกไนต์ถึงบิทูมินัสสารระเหยสูงระดับซี (Lignite – high volatile bituminous C) อ้างอิงจากตัวชี้วัดความพร้อมสมบูรณ์ทางชีวภาพ (Biomarker maturity) ซึ่งบ่งชี้ว่าตัวอย่างหินมีระดับความพร้อมสมบูรณ์อยู่ในระดับตอนต้น (immature-early mature stage) แก๊สโครมาโตแกรมของแอลเคนสายตรง (n-alkanes) …
Terrain Analysis In Phetchabun Province, Tanapat Pichetsopon
Terrain Analysis In Phetchabun Province, Tanapat Pichetsopon
Chulalongkorn University Theses and Dissertations (Chula ETD)
Phetchabun province, lower northern Thailand is vulnerable to geohazards, landslide and flooding with the potential for significant harm to people and property. In addition, Phetchabun province has many lineaments that could be potential source of tectonic activities. In this study, terrain analysis techniques are used through 30 meters resolution Digital Elevation Model (DEM) data in order to determine geomorphic indices related to tectonic activity. The statistic index method (Si) is calculated in relation of six parameters to indicate landslide susceptible area. and the hydromorphometric contrast index (HCI) is used to identify sensitive area to flooding by evaluating five parameters. According …
Color Enhancement Of Tourmaline By Electron Beam Irradiation, Waratchanok Suwanmanee
Color Enhancement Of Tourmaline By Electron Beam Irradiation, Waratchanok Suwanmanee
Chulalongkorn University Theses and Dissertations (Chula ETD)
Tourmaline is a semi-precious stone that is quite popular in gem market. Red-purple tourmaline, so-called “Rubellite”, is particularly famous. Consequently, pink tourmalines have recently been enhanced by gamma radiation to intensify color as rubellite. In this study, an electron beam technique was applied for experimental treatment. Moreover, gamma ray irradiation was also applied to treat the same sample collection for comparison. Color enhancement was designed for both radiations at three levels of doses, i.e., 400, 800, and 1,200 kilogreys. Pink and green tourmalines from Nigeria were collected for the experiment. Each sample was cut into two tablets for experimental irradiations …
Suid Fossils And Sedimentology From The Chaloem Phra Kiat And Phimai Sandpits, Nakhon Ratchasima Province, Thunchanok Kawinate
Suid Fossils And Sedimentology From The Chaloem Phra Kiat And Phimai Sandpits, Nakhon Ratchasima Province, Thunchanok Kawinate
Chulalongkorn University Theses and Dissertations (Chula ETD)
The suid fossils were recorded in fluvial sediments at the Chaloem Phra Kiat and Phimai Districts, Nakhon Ratchasima Province. In this study, numerous suid fossils were identified systematically by the measurement and description in detail of the external morphology of teeth, and comparison with other related species. Sedimentary facies and facies association from stratigraphy of fluvial depositional environment from sandpits have also been studied. As a result, sediments from Chaloem Phra Kiat and Phimai sandpits comprise very fine to coarse-grained sand with dominate sedimentary structures of the fluvial deposits. The cumulative stratigraphical thickness of the studied successions was 12-15 m. …
Reconstruction Of Sea Level Fluctuation And Environmental Change In Khao Sam Roi Yot National Park, Changwat Prachuap Khiri Khan During The Late Holocene, Worakamon Nudnara
Reconstruction Of Sea Level Fluctuation And Environmental Change In Khao Sam Roi Yot National Park, Changwat Prachuap Khiri Khan During The Late Holocene, Worakamon Nudnara
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Gulf of Thailand is generally provided the efficiency evidences of sea level fluctuation according to the lack of tectonic events. Sam Ro Yot National Park (SRY) is located in the west coast of the Gulf of Thailand with its elevation approximately at sea level. Sedimentary sequences from SRY wetland has been obtained. This sedimentary sequence can be divided into 3 units, comprised dark grey silty to sandy clay of unit A, beige clay of unit B, and gyttja sediment of unit C. An intensive analysis was focused on core CP-4 because it is the longest core and compose of …
Ore Reserve Estimation By Using A Geostatistical Tool At Heinda Mine,Tanintharyi Region,Union Of Myanmar, Aye Min Tun -
Ore Reserve Estimation By Using A Geostatistical Tool At Heinda Mine,Tanintharyi Region,Union Of Myanmar, Aye Min Tun -
Chulalongkorn University Theses and Dissertations (Chula ETD)
Heinda mine is one of major tin producers in Myanmar. The mine has been operated for over 100 years. The mine falls at Latitude 14° 8’ N and Longitude 98° 27’ E, approximately about 45 kilometers to the east of Dawei. The ore reserve is the principal factor of mining venture. The aim of this study is to improve the ore reserve estimation by using geostatistical method (ordinary kriging) compared with conventional method (polygonal method) In geostatistical evaluation, it involved variogram analysis, variogram modelling and kriging estimation. The exponential variogram modelling was used to calculate the ordinary kriging estimation. The …
Pre-Feasibility Study On Granite Quarry For Aggregate: A Case Study At Kanchanaburi Province, Thailand, Bee Ziyivang
Pre-Feasibility Study On Granite Quarry For Aggregate: A Case Study At Kanchanaburi Province, Thailand, Bee Ziyivang
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aims to develop long term mine planning and design, equipment requirement calculation, and financial model analysis of mining and crushing plant. The ore reserve estimation and pit design carried out by using MineSight software (Ver. 9.50). A discounted cash flow model (DCF) and sensitivity analysis used to evaluate the financial project. Based on our study, the open-pit mining method was advisable for mine planning and design. Ore reserve estimated to 48.4 Mtons under the mining operation of 2.4 Mtos per year. The project time frame is 22 years which spends 21 years for operation and one year for …
Heavy Metals In Hair And Nails Of Electronic Waste Dismantling Workers In Buriram, Thailand, Jaruwan Silachan
Heavy Metals In Hair And Nails Of Electronic Waste Dismantling Workers In Buriram, Thailand, Jaruwan Silachan
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to investigate and compare the concentration of eight heavy metals (As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn) in hair and nails of e-waste workers and non-e-waste workers. Hair and nails samples were collected from participants in Daeng Yai sub-district, Ban Mai Chaiyapot district, and Ban Pao sub-district, Puttatisong district, Buriram, Thailand from December 2018 to January 2019. All sampled were digested with nitric acid by microwave digester and the concentration of heavy metals was analyzed by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The results showed that the concentration of As and Cd in both …
Inhalation Exposure And Urinary Level Of Heavy Metals Of Electronic Waste Dismantling Workers In Buriram, Thailand., Panvarong Wongsabsakul
Inhalation Exposure And Urinary Level Of Heavy Metals Of Electronic Waste Dismantling Workers In Buriram, Thailand., Panvarong Wongsabsakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
The main objective of this study was to assess the health risk of electronic waste dismantling workers exposed to heavy metal (As, Cd, Cr, Cu, Pb, Ni, Mn, and Zn) in PM10 using urinary heavy metals as a biomarker. The levels of heavy metals in the urine of non- and e-waste dismantling workers in consequence of the exposure to heavy metals in PM10 were investigated at Daengyai sub-district, Banmaichaiyapot district, and Banpao sub-district, Phutthaisong district, Buriram province, from February to March 2019. A face-to-face interview using a questionnaire was carried out to get additional information from the target participants. The …
Pm2.5, Pm10 Air Pollution And Associated Heavy Metals In Traffic Congested And Construction Areas Of Bangkok, Paphinwit Thammasaroj
Pm2.5, Pm10 Air Pollution And Associated Heavy Metals In Traffic Congested And Construction Areas Of Bangkok, Paphinwit Thammasaroj
Chulalongkorn University Theses and Dissertations (Chula ETD)
The capital city of Thailand, Bangkok, is facing a serious problem caused by overpopulation and traffic congestion. In the this work, particulate matter, both PM2.5 (diameter < 2.5 μm) and PM10 (diameter < 10 μm) were quantified at the road nears construction areas and road with high traffic; compared with a control area. The sampling area comprised of Pattanakarn Road and Srinagarindra Road located on the eastern route, located between the inbound and outbound junction. Mini-volume air sampler was used to collect PM2.5, while cyclone air samplers were used to collect PM10. The samples were collected from November to December 2018, for 12 hours per day for 5 days at each sites. The collected samples were then digested by using microwave digestion for heavy metal components like Fe, Cu, Zn, Cd and Pb. Then, they were analyzed by Graphite Furnace Atomic Absorption Spectrometry (GFAAS) to quantify the heavy metal concentrations. Video recorders were installed at each sampling areas to monitor the traffic flow and it was found that construction areas were the most crowded. The average PM2.5 and PM10 concentrations in the construction areas were higher than those in traffic areas with no construction and the background site (a park), which had no impacts from construction and traffic. Heavy metals associated with particulate matter emitted during construction activities is an emerging environmental issue; however, construction activities are required for convenience and development. This study provides important data required to monitor the future trends of air pollution sources.
Adsorption Of Haloacetonitriles By Carbonized Metal-Organic Frameworks, Phattarawarin Rodbutr
Adsorption Of Haloacetonitriles By Carbonized Metal-Organic Frameworks, Phattarawarin Rodbutr
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research investigated adsorption efficiency of four including; Chloroacetonitrile (MCAN), Dichloriacetonitrile (DCAN), Bromoacetonitrile (MBAN) and Dibromoacetonitrle (DBAN) on five acid-washed carbonized metal-organic frameworks (MOFs) (WC-ZIF-8, WC-MIL-53, WC-MIL-88B, WC-UiO-66 and WC-HKUST-1) compared with powder activated carbon (PAC S10). The synthesized materials were characterized by XRD, SEM-EDS, nitrogen adsorption isotherms, FTIR and XPS. The screening experiment revealed that WC-MIL-88B, WC-ZIF-8, and PAC had highest adsorption capacities for four HANs, respectively. The HANs molecular size and their hydrophobicity influenced the adsorption rates of HANs in the order of DBAN>DCAN>MBAN>MCAN. The adsorption isotherms showed that Di-halogenic HANs (DBAN and DCAN) can …
A Market-Based Probabilistic Risk Assessment Of As Concentration In Raw And Cooked Rice In Bangkok, Supanad Hensawang
A Market-Based Probabilistic Risk Assessment Of As Concentration In Raw And Cooked Rice In Bangkok, Supanad Hensawang
Chulalongkorn University Theses and Dissertations (Chula ETD)
Rice is a staple food of human and can be a main source of arsenic (As) exposure. This study was conducted to i) investigate the concentrations of total, inorganic and bioaccessible of As in raw rice, ii) investigate the effects of rice processing before human consumption on the concentrations of As in rice, and iii) evaluate the potential health impacts of As exposure through rice consumption. A total of 208 polished and non-polished samples sold in the local markets of Bangkok were collected. The total As concentrations in polished (0.0878 to 0.2949 mg kg-1, n = 154) and non-polished (0.1187 …
Blood Lead And Cadmium Levels Of E-Waste Dismantling Workers From Inhalation Exposure To Pm2.5 And Pm2.5-10, Buriram, Thailand, Thidarat Sirichai
Blood Lead And Cadmium Levels Of E-Waste Dismantling Workers From Inhalation Exposure To Pm2.5 And Pm2.5-10, Buriram, Thailand, Thidarat Sirichai
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research aims to investigate blood lead and cadmium levels in associated with inhalation exposure of Pb and Cd in PM2.5 and PM2.5-10 of the e-waste dismantling workers and non-e-waste dismantling workers in Daeng Yai sub-district, Ban Mai Chaiyapot district, and Ban Pao sub-district, Puttatisong district, Buriram, Thailand, during May to August 2019. Blood samples were collected on the next day after the air sampling. Pb and Cd in blood and air samples were quantitatively analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The mean blood lead levels of e-waste workers from Daeng Yai sub-district, and Ban Pao sub-district, and …
Factors Affecting The Purchase Of Commercial Endowment Insurance For The Chinese Adults, Tiantian Jin
Factors Affecting The Purchase Of Commercial Endowment Insurance For The Chinese Adults, Tiantian Jin
Chulalongkorn University Theses and Dissertations (Chula ETD)
The study aimed to explore factors affecting the purchase of commercial endowment insurance for the Chinese adults. It used secondary data from “China Health and Retirement Longitudinal Study”, this data was based on family and individual who are 45 and over years old with a total of 17,000 individuals in 2015. In this study the percent of people with commercial endowment insurance is 0.93%, while the percent of people without is 99.07% so it used the Binary logistic model. Factors are studied from individual characteristic consists of age, gender, education, health status and income, and family characteristic composes of number …
Reducing The Defects Of A-Pillar Stamping Partin Automotive Assembly Process, Hassakorn Rojpitinithikorn
Reducing The Defects Of A-Pillar Stamping Partin Automotive Assembly Process, Hassakorn Rojpitinithikorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
The goal of this research is to minimize defects in the process of automotive assembly. Regarding the one-year defect and value; the biggest defect cost come from portion of the A-Pillar stamping parts. Therefore, by using Failure Mode and Effect Analysis (FMEA) to examine it and perform experiments using the Design of Experiment (DOE), we investigated the production process as well as figuring out the cause of the problems that happen in the stamping process. The results found that the issue arose from the design of stamping die, which is the risk of springback problems of parts, is not good …
Improvement Of Forex Pairs Trading Strategy With Machine Learning Algorithms, Ronnachai Jirapongpan
Improvement Of Forex Pairs Trading Strategy With Machine Learning Algorithms, Ronnachai Jirapongpan
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis aims to study machine learning to improve the trading performance of pairs trading strategy. Pairs trading strategy is one of the most well-known algorithm trading developed in the 1980s by a group of scientists and mathematicians. The concept of the pairs trading strategy is to exploit the mispricing of two equities which their prices tend to move in the same manner. When the algorithm captures the mispricing behavior by equations or indicators, traders open a short position on the equity which its price is relatively higher than the equilibrium and open long position of the other equity. If …
In Search Of The ‘Right’ Kind Of Financialization: Politics Of Financial Inclusion In Thailand, Frank Tyler Oneal
In Search Of The ‘Right’ Kind Of Financialization: Politics Of Financial Inclusion In Thailand, Frank Tyler Oneal
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis is a critical observation of the politics of financial inclusion in Thailand from 2001 until the present time. The systemic approach embedded in the Political Economy of Complex Interdependence encourages us to focus on the coevolution of financial innovation and regulation. With data collected through interviews, field observations, and doctrinal analysis, I argue that neoliberal axioms embedded in the first policies to expand financial services evolved to engender the financialization of everyday life under auspices of financial inclusion. Furthermore, how the interdependence of financial development and Thaksin's transformative policies recoupled subjects away from the state, and to the …
What Is Behind The Choice Of Post Millennial (Generation Z)’S Profession In Thailand?, Kwanjira Jirapongsak
What Is Behind The Choice Of Post Millennial (Generation Z)’S Profession In Thailand?, Kwanjira Jirapongsak
Chulalongkorn University Theses and Dissertations (Chula ETD)
Today's labor market mainly belongs to four generations which are Baby boomers generation, Generation X, Millennials, and Post-millennials or generation Z. This research focuses on generation Z who have a different mindset from the previous generations and they will become a main workforce in the future while the Baby boomer generation is retiring in no time. In the modernized society, companies give high priority to technology in operating their business. Generation Z is a group of people born after 1995 and referred to people who grew up with technology. Consequently, it is obviously observed that they will bring new innovations …