Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2018

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 164791 - 164820 of 170097

Full-Text Articles in Entire DC Network

Effects Of Monovalent Ions On Low Salinity Waterflooding In Shaly-Sandstone Reservoir, Ativish Yomchan Jan 2018

Effects Of Monovalent Ions On Low Salinity Waterflooding In Shaly-Sandstone Reservoir, Ativish Yomchan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Multi-component Ion Exchange (MIE) was proved to be a major mechanism occurred during Low Salinity Waterflooding (LSWF). Reduction of both total salinity and concentration of divalent ions of injected water together with a presence of monovalent ion results in dissolution of divalent ions linking between rock surface and oil. As a consequence, oil is liberated from rock surface. This study aims to study effects of monovalent ions in MIE mechanism. Stirring test is performed and results show that ion with less hydration radius tends to be more active in MIE; hence, potassium ion and cesium ion illustrate potential in oil …

Go to article

Evaluation Of Wax Deposition Prevention For Crude Oil Production From Mae Soon Oil Field, Htet Myat Min Jan 2018

Evaluation Of Wax Deposition Prevention For Crude Oil Production From Mae Soon Oil Field, Htet Myat Min

Chulalongkorn University Theses and Dissertations (Chula ETD)

Waxy crude oils are normally found in petroleum reservoirs. Crude oil with the wax formation is one of the crucial problems for flow assurance of pipeline transportation in oil and gas production. This issue can commonly cause wax deposition problem and it has made a huge amount of economic losses such as production, time and maintenance cost. Therefore, it is a critical aspect to deal with wax deposition for crude oil flow assurance, especially at the surface region in cold climate. In this study, n-heptane and poly (maleic anhydride-alt-1-octadecane) or MA as the inhibitors with different concentrations will be measured …

Go to article

Mineral Inclusions In Ruby And Sapphire From Bo Welu And Bo Rai Deposits, Eastern Thailand, Supparat Promwongnan Jan 2018

Mineral Inclusions In Ruby And Sapphire From Bo Welu And Bo Rai Deposits, Eastern Thailand, Supparat Promwongnan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Corundum deposits located in several places around the world which appear to have different genesis models. The origins of corundum can be distinguished by mineral inclusions. In this study, most of the rough gem corundum from Bo Rai deposit, Trat Province, and Bo Welu deposit, Chanthaburi Province, in Eastern Thailand show etched or dissolved surfaces that were resulted from dissolution by hot basaltic magma during transportation to the surface. Moreover, these gem corundums also show absorption spectral characteristics related to trace elements which typical for corundum from this area. Corundums from Bo Rai deposit in Trat Province, and from Bo …

Go to article

Pre-Feasibility Study Of Silica Sand Processing Plant In Sihanoukville Province, Cambodia, Sochea Ros Jan 2018

Pre-Feasibility Study Of Silica Sand Processing Plant In Sihanoukville Province, Cambodia, Sochea Ros

Chulalongkorn University Theses and Dissertations (Chula ETD)

Nowadays, bottom ash and flue gas desulfurization (FGD) gypsum are by-products of the coal combustion process from coal-fired power plant. Bottom ash has been applied in many applications such as landfill, cement industry etc., and FGD gypsum is applied in cement and wallboard industry. Also, they can be used in agricultural activities for soil amendment but the amount of bottom ash and FGD used in this function is still low. Furthermore, biochar has long been used to improve soil fertility. The positive impacts of biochar amendment on soils are that it can increase soil capacity to adsorb plant nutrients, decrease …

Go to article

Utilization Of Biochar Coupled With Coal Combustion Products For Degraded Soil Amendment, Thidphavanh Sengsingkham Jan 2018

Utilization Of Biochar Coupled With Coal Combustion Products For Degraded Soil Amendment, Thidphavanh Sengsingkham

Chulalongkorn University Theses and Dissertations (Chula ETD)

Low Salinity Waterflooding (LSWF) has been intensively studied worldwide as it is a low-cost technique. By injecting water with very low salinity compared to formation water in the reservoir, the method changes equilibrium between rock surface, oil and surrounding water, causing wettability alteration through Multi-component Ion Exchange (MIE) mechanism. In this study, ammonium ion is added into low salinity water to facilitate the MIE mechanism in shaly-sandstones reservoir. Experiments are performed with shaly-sandstone rock as it contains both calcium and magnesium ions as part of clays and ammonium ion can express its potential by triggering MIE mechanism. Stirring test, spontaneous …

Go to article

The Design Of Thailand International Public Sector Standard Management System And Outcomes In Service For The Private Sector And People System (P.S.O. 1107): Case Study Of Siriraj Piyamaharajkarun Hospital, Pimadej Siwapornpitak Jan 2018

The Design Of Thailand International Public Sector Standard Management System And Outcomes In Service For The Private Sector And People System (P.S.O. 1107): Case Study Of Siriraj Piyamaharajkarun Hospital, Pimadej Siwapornpitak

Chulalongkorn University Theses and Dissertations (Chula ETD)

The application of privatization in public sector is a one of strategic transformations that significantly helps promoting the organizational development in terms of efficiency and quality which subsequently resulted to the continuous financial development which refers to as revenue and profitability. Such development usually will be corresponded to the competitive market which indicates the organizational achievement. However, privatization can possibly create direct impacts on public sector and stakeholders as well if it was conducted in the public sector that emphasized on public health services such as public hospital where the core product is health care or medical treatment. The objectives …

Go to article

Politics Of Changes In Thailand's University Admission Policy (1999-2017), Nitchapat Kitcharern Jan 2018

Politics Of Changes In Thailand's University Admission Policy (1999-2017), Nitchapat Kitcharern

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research aims to study a significant phenomenon, the changes in Thailand's University Admission system between 1999 and 2017. During this period, the admission system was changed six times. This research focuses on the political factors that led to the changes in admission policy, particularly the relationships among politicians, bureaucracy, schools, civil society and students. The purpose of this research is threefold: (1) to understand the causes and procedures of changes in Thailand's university admission policy, (2) to study and understand the correlation between politics and changes in university admission system, and (3) to understand the impact these changes had …

Go to article

Crude Oil Removal By Sphingobium Sp. Mo2-4 And Bacillus Megaterium Tl01-2 Immobilized On Aquaporous Gel, Adisan Rungsihiranrut Jan 2018

Crude Oil Removal By Sphingobium Sp. Mo2-4 And Bacillus Megaterium Tl01-2 Immobilized On Aquaporous Gel, Adisan Rungsihiranrut

Chulalongkorn University Theses and Dissertations (Chula ETD)

Petroleum products are the major energy sources that drive global economy. The exploration and exploitation of crude petroleum oil increase the potential risk for oil spills in marine ecosystem. In this work, two non-pathogenic sponge-associated bacteria were developed as immobilized bacterial co-culture for crude oil removal from seawater. Two bacteria were Spingobium sp. MO2-4 that could degrade crude oil, diesel oil, and fuel oil, and Bacillus megaterium TL01-2 that could degrade crude oil, possessed high cell surface hydrophobicity, could tolerate heavy metal, and was able to form biofilm.. The modified polyurethane foam, aquaporous gel (AQ), was used as carrier for …

Go to article

Diesel Removal Efficiency In Soil Washing Process By Mixed Solution Of Nonionic Surfactant And Biosurfactant, Pajaree Boonyathai Jan 2018

Diesel Removal Efficiency In Soil Washing Process By Mixed Solution Of Nonionic Surfactant And Biosurfactant, Pajaree Boonyathai

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this study, Tween 80 and three biosurfactant (Rhamnolipid, Saponin and Lipopeptide) were mixed to formulate the appropriate surfactant solution for diesel removal from contaminated soil by washing process. The mixed surfactant system was fixed at 5% w/v of active surfactants concentration in total with different mass ratio of Tween 80 to biosurfactant at 9:1, 8:2 and 7:3 of total concentration. The critical micelle concentration (CMC) of various ratio surfactant mixtures and their interfacial tension (IFT) with diesel were determined and compared with their individual surfactant. The results illustrate that mixed Tween and Lipopeptide at 9:1 mass ratio had the …

Go to article

Formulation Of Oil Dispersants By Mixing Lipopeptide Biosurfactant And Non-Ionic Surfactants, Parisarin Nawavimarn Jan 2018

Formulation Of Oil Dispersants By Mixing Lipopeptide Biosurfactant And Non-Ionic Surfactants, Parisarin Nawavimarn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Marine oil spill can cause various harmful impacts to the environment. To solve this problem, dispersant is usually applied to enhance petroleum remediation in seawater. The commercial dispersants mostly contain surfactant and solvent that can be toxic to marine lives. This study aimed to formulate solvent-free biosurfactant-based dispersants by mixing lipopeptides from Bacillus subtilis GY19 with fatty alcohol ethoxylate (Dehydol LS7TH), a low toxicity nonionic surfactant. Hydrophilic-lipophilic deviation (HLD) concept was applied. The fractions of lipopeptide and dehydol LS7TH were determined based on the equivalent alkane carbon number (EACN) of hydrocarbons under seawater salinity (34ppt). The molar fractions of lipoppeptide …

Go to article

Pm10 And Pm2.5 Concentrations In Bangkok Over 10 Years And Implications For Air Quality, Tin Thongthammachart Jan 2018

Pm10 And Pm2.5 Concentrations In Bangkok Over 10 Years And Implications For Air Quality, Tin Thongthammachart

Chulalongkorn University Theses and Dissertations (Chula ETD)

Atmospheric particulate matter particles with a diameter less than 10 micron (PM10) and less than 2.5 micron (PM2.5) have been adverse human health effect. Ambient air pollution data in Central Business District (CBD) of Bangkok monitored by Pollution Control Department and Bangkok Metropolitan Administration were collected over ten years in Bangkok from 2008 to 2017. Trend of the particulate matter concentrations data were investigated over ten year for implications of activities related to air pollution. Daily average air pollution data between year 2015 and year 2017 were used as the dependent variables to develop mathematic models with multiple linear regression …

Go to article

Validity And Reliability Of Automatic Range Of Motion Measurement Using The Elbow Joint Photograph, Chris Charoenlap Jan 2018

Validity And Reliability Of Automatic Range Of Motion Measurement Using The Elbow Joint Photograph, Chris Charoenlap

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Photographic-based arc of motion measurement methods required human assessors and its accuracy is depend on observer experience. Objectives: Current research proposed method of using digital image processing technique (DIPT) for measuring elbow range of motion. Methods: Participants were enrolled from students and staffs in the university. Fluoroscopic images of both elbows were taken in flexion and extension positions. Two physiotherapists performed goniometer, inclinometer and smartphone gyroscope range of motion (ROM) measurement on bilateral elbows. Photographer took elbow images in fully extension and fully flexion three times for each position with 8-megapixel smartphone camera. The extension and flexion angles were …

Go to article

Prescription Of Anti-Osteoporosis Medication Among Orthopedic Surgeon (Pam-Os Study) In Osteoporotic Hip Fracture, Piyabuth Kittithamvongs Jan 2018

Prescription Of Anti-Osteoporosis Medication Among Orthopedic Surgeon (Pam-Os Study) In Osteoporotic Hip Fracture, Piyabuth Kittithamvongs

Chulalongkorn University Theses and Dissertations (Chula ETD)

Summary: As a medication for preventing osteoporotic fracture is recommended but scarcely prescribed, this study surveyed Thai orthopedic surgeons to explore key determinants of their prescription practices. In addition to a set of well-known determinants, the patient's health insurance status could also influence the prescription practice.Purpose: Although many guidelines suggest using anti-osteoporosis medications in patients who suffered from fragility hip fractures, low rate of prescription was encountered all over the world. In this study, we aimed to explore potential determinants affecting the prescription of anti-osteoporosis medications by orthopedic surgeons.Materials and methods:Online questionnaire survey was conducted among randomly selected orthopedic surgeons …

Go to article

The Validity And Reliability Of The Patient Health Questionnaire 9 In Screening Poststroke Depression, Piyapat Dajpratham Jan 2018

The Validity And Reliability Of The Patient Health Questionnaire 9 In Screening Poststroke Depression, Piyapat Dajpratham

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Poststroke depression occurred about 30% during the first five years after stroke. Timely diagnosis and management could facilitate motor recovery and improve independence. The Patient Health Questionnaire 9 (PHQ-9) is one of the best screening tools for poststroke depression. Since specific screening tool has not yet presented in Thailand, the validity and reliability of the PHQ-9 in stroke patients is clinically essential. Objectives: To study the criterion validity and reliability of the PHQ-9 (Thai version) in screening poststroke depression by comparing to the psychiatric interview as the gold standard. Material and Methods: First ever stroke patients age 45 years …

Go to article

Significant Coronary Artery Stenosis Assessment: Diagnostic Accuracy Of Quantitative 4d-Mspect Stress Radionuclide Myocardial Perfusion Imaging, Tarit Taerakul Jan 2018

Significant Coronary Artery Stenosis Assessment: Diagnostic Accuracy Of Quantitative 4d-Mspect Stress Radionuclide Myocardial Perfusion Imaging, Tarit Taerakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

OBJECTIVES: The objective of this study was to evaluate the effectiveness of quantitative assessment of radionuclide myocardial perfusion imaging in indicating significant coronary artery stenosis. METHODS: Seven hundred and twenty patients with suspicion of coronary artery disease were retrospectively identified. All of them had undergone cardiac catheterization within the 6-month period after having one-day pharmacologic stress radionuclide myocardial perfusion scan. Important parameters were analyzed including myocardial perfusion, wall motion, wall thickening severity scores of 3 coronary artery territories and left ventricular ejection fraction values. These parameters were subsequently compared with the results of gold standard cardiac catheterization. RESULTS: Binary logistic …

Go to article

Caring For Patients With Drug Use Disorders In Yangon Region, Myanmar : Socioeconomic And Psychological Burden And Coping Strategies, Khin Zar Khaing Thein Jan 2018

Caring For Patients With Drug Use Disorders In Yangon Region, Myanmar : Socioeconomic And Psychological Burden And Coping Strategies, Khin Zar Khaing Thein

Chulalongkorn University Theses and Dissertations (Chula ETD)

Drug use disorders are considered chronic illnesses, like other severe mental disorders, and caregivers of drug users face a large impact on various aspects of their life. However, there is shortage of research in Myanmar about caregivers' experiences with caring for patients with drug use disorders. This mixed method study, therefore, aims at exploring the socioeconomic and psychological burden caregivers carry, the coping strategies they employ, as well as the barriers to coping they face. The results of the framework analysis revealed that financial loss, productivity loss, social limitation and negative impact on family members are important dimensions of socioeconomic …

Go to article

System Dynamics Analysis Of Sugar-Sweetened Beverage Taxing Effect On Sugar Consumption, Dental Health Service Utilization And Oral Health For Thai Adults And Elderly, Nipaporn Urwannachotima Jan 2018

System Dynamics Analysis Of Sugar-Sweetened Beverage Taxing Effect On Sugar Consumption, Dental Health Service Utilization And Oral Health For Thai Adults And Elderly, Nipaporn Urwannachotima

Chulalongkorn University Theses and Dissertations (Chula ETD)

Dental caries is a major oral health problem, particularly among developing countries. Almost half of Thai adults and elderly have at least one untreated dental caries. Dental caries can result in debilitating pain that affects work productivity and even the performance of daily activities. The objectives of this study are to develop system dynamics model addressing the relationship of dental caries, sugar consumption and dental health service utilization of Thai population aged 15 and older; and to estimate the changes of dental caries prevalence when the sugar-sweetened beverage tax is implemented. A multi-sector system dynamics model was developed to consolidate …

Go to article

Effects Of Surfactants And Thickness Of Carbon Nanotube Film On Conductive Property For Touch Screen, Thimaporn Channarong Jan 2018

Effects Of Surfactants And Thickness Of Carbon Nanotube Film On Conductive Property For Touch Screen, Thimaporn Channarong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Conductive transparent film technology has been developed extensively for electronic industry such as touch panel and so on. In this study, single-wall carbon nanotubes (SWCNTs) was chosen to disperse in acrylic resin and homogenized by surfactant. The dispersion of SWNCT is one of the key factors that strongly influences the properties of these products. Thus Hydrocarbon and Silicone surfactant types were compared. The wire-bar coating technique was used to produce a conductive film PET base. Our objectives were to study the effects of surfactants and thickness of SWCNT film on conductivity and transparency. Surfactant concentration was varied 0.1 – 2.0 …

Go to article

Simulation Model For Outbound Logistics In Quarry Business, Chanyakan Chawaranggoon Jan 2018

Simulation Model For Outbound Logistics In Quarry Business, Chanyakan Chawaranggoon

Chulalongkorn University Theses and Dissertations (Chula ETD)

The study of outbound logistics is part of quarrying process where final products are being served to customers. It includes all activities begins from when a truck entering weight station to when the truck leaves the system after a final weighing. An increasing of customer demands within limited serving space and limited resources cause a higher total flow time customer spent in the system which also leads to longer queues. The study aims to simulate a current outbound logistics for a quarry business using ARENA simulation model and analyze truck queueing and loader scheduling policy that help reduce total flow …

Go to article

Improving Raw Materials Warehouse Utilization And Efficiency In A Haircare Manufacturer, Chariya Paveenchana Jan 2018

Improving Raw Materials Warehouse Utilization And Efficiency In A Haircare Manufacturer, Chariya Paveenchana

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aims to improve the capacity, efficiency, and utilization of raw materials warehouse in a case study of haircare manufacturer in Thailand. At the same time, it is our goal to save the storage cost of finished products at the external public warehouse by locating some of the finished products at this internal raw materials warehouse. The key methodologies used to improve the current raw materials warehouse are removing obsolete materials from the warehouse, regrouping materials according to types, sizes, and turnover rates, reallocating space for each group of materials, considering beam height adjustment, and reassigning the location for …

Go to article

Defect Reduction In Manufacturing Process Of In-Mold Decoration Of Injection Molded Components, Jintra Supapan Jan 2018

Defect Reduction In Manufacturing Process Of In-Mold Decoration Of Injection Molded Components, Jintra Supapan

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purpose of this research is to reduce the defect rate from manufacturing process of in-mould decoration (IMD), a process combining PET film with decorative patterns are moulded together with ABS resins, which has been developed to reduce the secondary process of decorative screen printing. Recently, the case study company has produced components with a high defect rate average 11.43% in Feb-Jun 2018, which increased sharply to 22.3% in June 2018. The major causes of the defect resulting from PET film peeled off and difficult to assembly. In order to reduce the defect rate, the five steps of the DMAIC …

Go to article

Development Of An International Curriculum Model In Education Management For Vietnam Higher Education Institutions, Thi My Ngoc Nguyen Jan 2018

Development Of An International Curriculum Model In Education Management For Vietnam Higher Education Institutions, Thi My Ngoc Nguyen

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purposes of this research are (1) to investigate the current state and the need for internationalization of curriculum of Master Degree in Education Management for Vietnam higher education institutions (2) to analyze good practices for the internationalization of curriculum of Master Degree in Education Management in international universities, (3) to develop an international curriculum management model for Vietnam higher education institutions. The samples include (1) seven policy makers at national and institutional level (2) five administrators at faculty level (3) 67 faculty members, and (4) 217 students from five Vietnamese higher education institutions offering Master Degree in Education Management. …

Go to article

Periodic-Review Order Policy For A Two-Echelon Inventory Problem With Seasonal Demand, Noppadon Sakulsom Jan 2018

Periodic-Review Order Policy For A Two-Echelon Inventory Problem With Seasonal Demand, Noppadon Sakulsom

Chulalongkorn University Theses and Dissertations (Chula ETD)

This dissertation presents methodologies to determine ordering policies for a 2-echelon inventory system with multiple replenishing modes under seasonal demand. The system operates on periodic review basis using reorder point and order-up-to point or (R,s,S). An Echelon stock concept is applied where each location makes decisions on its own inventory information and the information of all locations downstream. We decompose a problem into two phases and propose a methodology based on mixed-integer programming models to determine ordering policies for a system with one replenishing mode. Then, another methodology based on the genetic algorithm and binary search is developed to solve …

Go to article

Forecasting International Tourist Arrivals From Major Countries To Thailand, Ontheera Hwandee Jan 2018

Forecasting International Tourist Arrivals From Major Countries To Thailand, Ontheera Hwandee

Chulalongkorn University Theses and Dissertations (Chula ETD)

Tourism industry is one of industries that are very important for Thai economy. In order to achieve effective marketing and resource planning, accurate forecasting of tourist arrivals from major countries to Thailand is necessary for Thai tourism industry. In this paper, various forecasting models are explored to forecast monthly tourist arrivals from China, Malaysia, Korea, Japan, Russia, UK and US. The proposed models include both time series models, i.e., SARIMA, Holt-Winter, and explanatory models, i.e., Multiple Regression and Feed Forward Artificial Neural Networks (FANNs). Economic factors such as income, relative price, exchange rates, and dummy variables of seasonality and news …

Go to article

Forecasting Hotel Daily Occupancy For High-Frequency And Complex Seasonality Data, Phoom Ungtrakul Jan 2018

Forecasting Hotel Daily Occupancy For High-Frequency And Complex Seasonality Data, Phoom Ungtrakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Accurate hotel daily occupancy forecasting is an important input for hotel revenue management. This research presents forecasting models both time series and causal methods for a case study 4-star hotel in Phuket, Thailand. Holt-Winters, Box-Jenkins, Box-Cox transformation, ARMA errors, trend and multiple seasonal patterns (BATS), Trigonometric BATS (TBATS), back-propagation Neural Network (BPNN), and Support Vector Regression (SVR) are explored in this work, where Same Day Last Year is considered as benchmark forecast. For causal method, independent variables used as regressor inputs are transformed data observed in the past periods, the number of tourist arrivals from main countries to Phuket, Oil …

Go to article

Designing Modular Fixture For Automotive Condenser Inspection, Tanest Lertkajornkitti Jan 2018

Designing Modular Fixture For Automotive Condenser Inspection, Tanest Lertkajornkitti

Chulalongkorn University Theses and Dissertations (Chula ETD)

In the automotive component manufacturing industry, the automotive parts must be produced with high precision according to the standard. And, to achieve such a goal, inspection fixtures are typically used as final inspection tools. These fixtures are highly specialized that often match only one stock-keeping unit of the condenser (SKU) each. Based on such a fact, as the number of SKUs rises, the number of fixtures produced would be inevitably increased, along with the resources required for fixture production, storage space, and maintenance. In order to address such issues, we explore and develop a new fixture design that turns specialized …

Go to article

Steady-State Determination Of Continuous Powder Mixing By Near Infrared Spectroscopy As Process Analytical Technology, Katesaraporn Wongves Jan 2018

Steady-State Determination Of Continuous Powder Mixing By Near Infrared Spectroscopy As Process Analytical Technology, Katesaraporn Wongves

Chulalongkorn University Theses and Dissertations (Chula ETD)

Powder mixing is one of an important unit operation in pharmaceutical manufacturing of solid dosage forms. Continuous mixing was developed as an alternative method to reduce disadvantages of traditional batch mixing processes. This process was originally developed using horizontal cylindrical mixer equipped with Process Analytical Technology (PAT) tools for real-time monitoring. In the present study, a vertical cylindrical mixer was developed and evaluated. Near Infrared (NIR) spectra obtained by monitoring the mixing process were pretreated with Multiplicative Scatter Correction (MSC), second derivative treatment and Norris-William smoothing in the 6800 - 8700 cm-1 range before a calibration model using PLS was …

Go to article

Preparation And Stabilization Of Saccharide Fiber Produced By Centrifugal Spinning, Pattama Donghuntong Jan 2018

Preparation And Stabilization Of Saccharide Fiber Produced By Centrifugal Spinning, Pattama Donghuntong

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objectives of this study were to prepare saccharide fiber via centrifugal spinning and further investigate its stability under stress condition. Different saccharides were chosen and spun via centrifugal force to form thread like matter. The results indicated that sucrose (SC) and trehalose (TH) could be fabricated as fiber whereas other saccharides were not able to form. The formation of fiber mainly involved with glass transition temperature (Tg), molten ability including stability of saccharide after melting. High Tg saccharides were a good candidate on fiber preparation. Homogeneous melting with appreciable stability was another factor affecting on fiber preparation. Decomposing after …

Go to article

Explaining Barriers And Opportunities For Recycled Pet For Food Packaging In Thailand Through The Lenses Of Organizational Environment Theory, Natawadee Sirithorn Jan 2018

Explaining Barriers And Opportunities For Recycled Pet For Food Packaging In Thailand Through The Lenses Of Organizational Environment Theory, Natawadee Sirithorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Currently, some plastic-related companies propose a solution of recycled plastic (rPET) for food packaging as a solution for the plastic problem in Thailand. Therefore, the objective of the thesis is to study business behavior in order to understand the rationale of why some company needs to use rPET for food packaging. This study combined two theories which are the organizational environment theory and the institutional theory of CSR to analyze the effect of the internal and the external environment that influence companies to support rPET food packaging. The finding indicates that companies' mission creates an influence on companies to promote …

Go to article

Stakeholder Analysis Of Socioeconomic Impacts On Chiang Rai-Chiang Khong Rail Project In Chiang Rai Province, Tanthita Sukhopala Jan 2018

Stakeholder Analysis Of Socioeconomic Impacts On Chiang Rai-Chiang Khong Rail Project In Chiang Rai Province, Tanthita Sukhopala

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objectives of this research are (1) to study the impacts of Chiang Rai - Chiang Khong rail project on Chiang Rai provinces, especially the social and economic impacts which are caused by the rail project, positively and negatively and (2) to analyze advantages and disadvantages of Chiang Rai - Chiang Khong rail project on Chiang Rai province. The scope of study covers 2 main areas including (1) the search for different impacts in 3 different train station areas and (2) the search for different impacts between local people who live within 5 kilometers of the area where train station …

Go to article

First Prev Next Last