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Synthesis Of Thiofuranosides By Dehydrative Glycosylation In Micellar Media, Trichada Ratthachag
Synthesis Of Thiofuranosides By Dehydrative Glycosylation In Micellar Media, Trichada Ratthachag
Chulalongkorn University Theses and Dissertations (Chula ETD)
Green and aqueous-based dehydrative glycosylation of thiofuranosides in micellar media was developed. The thiofuranosides are useful as precursors for carbohydrate synthesis, biological active molecules, and bio-surfactants. Dodecylbenzenesulfonic acid (DBSA), a commercially available Brønsted acid-surfactant, was employed to increase solubility of substrates and enhance rate of the glycosylation. Herein, we report the dehydrative glycosylation of furanosides and pyranosides with aliphatic, aromatic, and heterocyclic thiols in aqueous media to afford the thiofuranosides. Microwave irradiation led to improved yields and shorter reaction times. Other reaction parameters such as temperature and the amount of acid used were also optimized. Aliphatic and aromatic thiofuranosides were …
Synthesis And Development Of Dipicolylamine Derivatives As New Fluorescent Chemosensors, Waroton Paisuwan
Synthesis And Development Of Dipicolylamine Derivatives As New Fluorescent Chemosensors, Waroton Paisuwan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Di-2-picolylamine (DPA) is a powerful chelator for many transition metal ions. In this thesis, new DPA fluorescent chemosensors consisting of a fluorophore such as either naphthalimide or quinoline are developed. The first part deals with the synthesis of 1,8-naphthalimide derivatives linked 2-, 3-, 4-((bis(pyridin-2-ylmethyl)amino)methyl)aniline, and 4-amino-2-((bis(pyridin-2-ylmethyl)amino)methyl)phenol. The metal ion sensing experiments showed N3D was selective toward Ag+ with fluorescent enhancement in aqueous emitting green fluorescence under blacklight. The complexation of [N3D+Ag+] is a 1:1 stoichiometric binding with a limit of detection (LOD) 0.67 µM. Second part is the synthesis of oxazolidinonyl DPA derivatives by using self-developed halo-induced cyclization followed by …
Metabolic Responses Of Aspergillus Niger Es4 To Ethanol Stress, Wimonsiri Kongchai
Metabolic Responses Of Aspergillus Niger Es4 To Ethanol Stress, Wimonsiri Kongchai
Chulalongkorn University Theses and Dissertations (Chula ETD)
Aspergillus niger ES4 is a fungus isolated from the top wall of an ethanol tank of the PTT public company limited. Because normally, microorganism cannot tolerate high amount of ethanol, the growth of A. niger ES4 on the ethanol tank indicates the special properties of this fungal strain in response to ethanol. This research was therefore aimed at studying the effects of ethanol on the metabolites production of A. niger ES4 by using both untargeted and targeted metabolomics. When A. niger ES4 cultures were grown in minimal media containing 4% of ethanol for 3 days, A. niger ES4 responded to …
Multi-Layered Elastic Medium Under Axisymmetric Loading And Surface Energy Effects, Kanin Tarntira
Multi-Layered Elastic Medium Under Axisymmetric Loading And Surface Energy Effects, Kanin Tarntira
Chulalongkorn University Theses and Dissertations (Chula ETD)
Multi-layered nano-scale structures have been found in a wide range of applications these days. Since the surface energy effect is presented at the nano-scale level, a novel calculation scheme is required to accurately capture the mechanical behaviors of such structures. In this study, a solution scheme for analysis of a multi-layered elastic medium with influence of surface energy effects subjected to axisymmetric loading by adopting Gurtin-Murdoch surface elasticity theory is presented. The standard Love's representation and Hankel integral transform are employed to derive the general solutions, and the obtained solutions are employed in the determination of the stiffness matrix for …
Weakly Singular Boundary Integral Equation Method For Analysis Of Generalized T-Stresses Of Cracks In 3d Coupled-Field Media, Naruethep Sukulthanasorn
Weakly Singular Boundary Integral Equation Method For Analysis Of Generalized T-Stresses Of Cracks In 3d Coupled-Field Media, Naruethep Sukulthanasorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis presents the development of a weakly singular boundary integral equation method for the analysis of the generalized T-stress of isolated cracks embedded in a coupled-field whole space. A pair of weak-form integral equations, one for crack-face generalized traction and the other for the gradient of the crack-face generalized displacement, is established in a general framework allowing various types of materials including elastic, piezoelectric, piezomagnetic and piezoelectromagnetic solids, general crack geometry and loading conditions to be handled in a unified fashion. In addition, the final governing integral equations contain only weakly singular kernels and this, as a result, renders …
Analysis Of Near Interface Cracks By Weakly Singular Boundary Integral Equation Method, Pisit Watanavit
Analysis Of Near Interface Cracks By Weakly Singular Boundary Integral Equation Method, Pisit Watanavit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis presents a weakly singular boundary integral equation method for analysis of sub-interface cracks in a three-dimensional, linearly elastic, multi-material domain. The formulation is established in a general framework allowing finite bodies, general material anisotropy and loading conditions, arbitrarily shaped cracks, and curved material interface to be treated. A system of integral equations governing the unknown data on the boundary, the crack surface and the material interface are established using a pair of weakly singular, weak-form displacement and traction integral equations and the continuity along the material interface. A symmetric Galerkin boundary element method together with the standard finite …
Role Of Progesterone Receptor A And B Isoforms In Lung Neuroendocrine Tumors, Teeranut Asavasupreechar
Role Of Progesterone Receptor A And B Isoforms In Lung Neuroendocrine Tumors, Teeranut Asavasupreechar
Chulalongkorn University Theses and Dissertations (Chula ETD)
Lung neuroendocrine tumors (NETs) incidences are increasing in recent years. Women with lung NETs have significantly better survival rates as compared to men suggesting the involvement of sex steroids and their receptors in the progression of lung NETs. Recent data suggested that progesterone receptor (PR) may play a role in the survival of lung NET patients. PR exists as two major isoforms, PRA and PRB. How expression of PR isoforms affects proliferation of lung NETs and patient's survival is not known. To determine the role of PR isoforms in lung NETs, we constructed H727 lung NET cell models expressing PRB …
Developing An Area Classification System From Mobile Phone Usage Data, Naruethai Thongphasook
Developing An Area Classification System From Mobile Phone Usage Data, Naruethai Thongphasook
Chulalongkorn University Theses and Dissertations (Chula ETD)
Since human activities are vary by time and place, there have been many attempts to extract social behavior in spatial studies which included area use in the city. This information helps gaining advantages in city and facilities planning. Nowadays, many people carry mobile phone with them for communication purpose. This motivates us to analyze mobile phone usage in different area types. This thesis proposes method of an analysis for area use classification from mobile phone usage pattern. CDR data was used to define mobile phone usage pattern by hour from 1:00 to 24:00 and day of week from Monday to …
High Capacity Image Steganography Tolerating Image Compression, Eittipat Kraichingrith
High Capacity Image Steganography Tolerating Image Compression, Eittipat Kraichingrith
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, data privacy becomes more important. Most of the existing data protection schemes based on cryptography cannot hide the existence of secret data. Thus, a steganography approach plays an important role to handle this problem. Image steganography can be categorized into two methods which are baesd on spatial domain and transform domain. Methods using spatial domain have high embedding capacity but they are not robust to image compression. On the other hand, methods using transform domain usually work with image compression but have low embedding capacity. In recent image steganography research, many transform domain methods are based on JPEG format …
Development Of In Situ Gel For Artificial Saliva And Satisfaction Study, Rawi Tishyadhigama
Development Of In Situ Gel For Artificial Saliva And Satisfaction Study, Rawi Tishyadhigama
Chulalongkorn University Theses and Dissertations (Chula ETD)
Xerostomia, the subjective complaint about the dry mouth, may lead to the difficulty in daily living including speaking, swallowing, taste acuity and sleeping. Patients are often advised to drink water or chew ice to moisturize the oral cavity and also recommended to use stimulant or saliva substitute, such as sour candies, chewing gum and artificial saliva. In Thailand, there is no artificial saliva products available in the market and this makes it difficult to access the artificial saliva. Hence, artificial saliva have been developed in the form of solution in many hospitals to dispense for xerostomia patients in the hospitals. …
Development Of An Instructional Model Integrating Webquest Learning Approach And Reflective Practice To Enhance English Critical Reading Ability Of Undergraduate Students In Cambodia, Chanchhaya Chhouk
Chulalongkorn University Theses and Dissertations (Chula ETD)
The purposes of this study were 1) to develop an instructional model integrating WebQuest Learning Approach and Reflective Practice to enhance English critical reading ability of undergraduate students, 2) to investigate the effectiveness of the instructional, and 3) to investigate undergraduate students' English critical reading ability development learning with the instructional model. The research and development processes were divided into four phases: 1) studying of the significance of the problem and learning approaches, 2) developing of the instructional model integrating WebQuest Learning Approach and Reflective Practice, 3) Studying the effectiveness of the instructional model integrating WebQuest Learning Approach and Reflective …
Socioeconomic Determinants Of Happiness Of The Elderly In Bhutan, Tashi Duba
Socioeconomic Determinants Of Happiness Of The Elderly In Bhutan, Tashi Duba
Chulalongkorn University Theses and Dissertations (Chula ETD)
Elderly in Bhutan are rising steadily as a proportion of total population. In 2015, population older than 60 constituted about 7.3% of the total population compared to 6.9% in 2010. By 2030, the elderly population is estimated to reach 10.1% of total population. Along with growing numbers of elderly in Bhutan and rapid socioeconomic transformations, the individual-level of happiness decreases with age, the lowest being among the elderly (the Gross National Happiness Index surveys of 2010 and 2015 and Bhutan Living Standard Survey 2012). Nevertheless, there is limited literature exploring factors that are associated with happiness of the elderly. This …
Tobacco Use, Health Care Utilization, Household Expenditure And Smoking Cessation In China, Changle Li
Tobacco Use, Health Care Utilization, Household Expenditure And Smoking Cessation In China, Changle Li
Chulalongkorn University Theses and Dissertations (Chula ETD)
This dissertation studied the tobacco use impact of on health care utilization, household expenditure, and self-rated health among rural residents in rural China. The 2010-2014 China Family Panel Studies data were employed here. Moreover, this study also conducted the randomized controlled trial and analyzed the cost-effectiveness smoking cessation intervention among college-aged smokers in Inner Mongolia, China. The main findings showed: (1) Current and former smokers use more outpatient care than non-smokers. Moreover, former smokers use more inpatient care than non-smokers in rural China. (2) Long-term quitters decreased the probability of using inpatient care compared with recent and moderate-term quitters in …
A Ubiquitous Mooc Instructional Design Model Based On Cognitive Dissonance For Enhancing Higher Education Students' Cross-Cultural Competence, Boonrat Plangsorn
A Ubiquitous Mooc Instructional Design Model Based On Cognitive Dissonance For Enhancing Higher Education Students' Cross-Cultural Competence, Boonrat Plangsorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
The research objectives of this study were (1) to study undergraduate students' opinions in designing a ubiquitous MOOC, (2) to develop a ubiquitous MOOC instructional design model based on cognitive dissonance for enhancing higher education student's cross-cultural competence (U-MOOC model), and (3) to study the effects of a ubiquitous MOOC instructional design model based on cognitive dissonance for enhancing higher education student's cross-cultural competence. This study used the research and development research methodology divided into three phases: survey research, U-MOOC model development, and experimental research. The samples of survey phase were 410 undergraduate students recruited from eight government universities. The …
Determination Of Waste Treatment Fee Pricing Mechanism For Municipal Solid Waste By Mechanical Biological Treatment Method Utilising The Public Private Partnership Model In Thailand, Adrian Paul Raj
Chulalongkorn University Theses and Dissertations (Chula ETD)
Private participation in the development of municipal solid waste treatment projects through public-private partnership models accelerate the implementation of sustainable treatment technologies such as Mechanical Biological Treatment (MBT) facilities within developing countries without creating excessive burden to government infrastructure investment. The introduction of preset pricing mechanism to regulate potential waste treatment fee structure based on pre-determined project internal rate-of-return mitigates multi-party risks, such as the potential developer project losses or the opportunity to profiteer. Research encompasses technical assessment of project requirements for implementation of required technologies, commercial analysis of project capital expenditure (CAPEX), operational expenditure (OPEX) and assessment of revenue …
Establishing A Luggage Handling Service Company, Anan Prasertrungreung
Establishing A Luggage Handling Service Company, Anan Prasertrungreung
Chulalongkorn University Theses and Dissertations (Chula ETD)
Luggage delivery service has never existed in Thailand officially but already established in another country such as Japan. However, this service has a potential to be a very good service as it could benefit to traveler which Thailand has welcomed more than 30m of them per annum but the model from another country could not be implement directly to Thailand. By developing the model, this service will fit to Thai's market. There are many risks that researcher has to consider before starting the business to avoid or prevent risks into the business. Moreover, this study will not limit only the …
The Effects Of English Accented Speeches, Specific Content Knowledge, And Test-Taking Strategies On Listening Comprehension Of High And Low Efl Achievers, Pornchanok Sukpan
The Effects Of English Accented Speeches, Specific Content Knowledge, And Test-Taking Strategies On Listening Comprehension Of High And Low Efl Achievers, Pornchanok Sukpan
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to examine (1) the effects of three main variables: English-accented speeches, specific content knowledge, and test-taking strategies on listening comprehension of high and low EFL learners. It also investigated (2) the relationship among these three variables on listening comprehension of high and low EFL achievers, and (3) the attitudes of both high and low EFL achievers towards English-accented speech. Eighty third-year university students from the Faculty of Communication Arts were purposively selected and classified into two different English proficiency groups: high and low regarding the z score of ±1 on the average grades of two prerequisite English …
Needs Analysis Of English Oral Communication For The Automotive Maintenance And Repair Profession, Witchuda Thakadkul
Needs Analysis Of English Oral Communication For The Automotive Maintenance And Repair Profession, Witchuda Thakadkul
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aims to investigate the needs of English oral communication for the automotive maintenance and repair profession based on perspectives of automotive mechanical students and stakeholders in the automotive industry in the Bangkok Metropolitan Area, and to propose an English oral communication course syllabus for automotive mechanical students' profession. The study is a survey research consisting of two phases: needs analysis and course syllabus development. The needs analysis process was based on the framework ESP needs analysis of Brown (2016). Data were collected by means of questionnaires with one hundred and nineteen automotive mechanical students and five stakeholders, and …
Roles Of Dissimilatory Nitrate Reduction To Ammonium In Biological Nitrogen Removal System, Pokchat Chutivisut
Roles Of Dissimilatory Nitrate Reduction To Ammonium In Biological Nitrogen Removal System, Pokchat Chutivisut
Chulalongkorn University Theses and Dissertations (Chula ETD)
Biological nitrogen removal system is a wastewater treatment process that normally utilizes nitrification-denitrification to convert nitrogen wastes to unharmful gaseous products. However, apart from these two pathways, dissimilatory nitrate reduction to ammonium (DNRA) can also compete with denitrification for nitrate and yield ammonium waste as the end product. The aim of this research is to extend knowledge on the DNRA pathway, including the study on its occurrence and microorganisms responsible for the process. To observe the presence of DNRA, microbial sludge from aquacultures which utilized biological nitrogen removal processes was applied to examine the pathway of DNRA in these systems. …
Study Of Gas-Liquid Absorption In Terms Of Bubble-Fluid Hydrodynamic And Mass Transfer Parameter: Liquid Phase And Gas Phase, Prajak Sastaravet
Study Of Gas-Liquid Absorption In Terms Of Bubble-Fluid Hydrodynamic And Mass Transfer Parameter: Liquid Phase And Gas Phase, Prajak Sastaravet
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research focus on study the effect of continuous system on the bubble hydrodynamic and mass transfer parameters (Qg, QL, DBd, UBd a, kL and kLa). The experiment were set up in a cylindrical acrylic column with 0.15 m inside diameter and 1 m in height. ILALR was setup an acrylic plate for liquid recirculation. Moreover, mass transfer determination, liquid phase was removed dissolved oxygen by using sodium sulphite (Na2SO3). The bubble hydrodynamic mechanisms are investigated by the high speed camera (100 images/sec) and image analysis program is used to determine the bubble hydrodynamic parameters. The bubbles are generated by …
Evaluation Of Voids In Class Ii Restorations Restored With Bulk-Fill And Conventional Nanohybrid Resin Composite, Saiisara Chaidarun
Evaluation Of Voids In Class Ii Restorations Restored With Bulk-Fill And Conventional Nanohybrid Resin Composite, Saiisara Chaidarun
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives: The aim of the study was to evaluate the influence of four resin composites on voids in small and large Class II cavities. Furthermore, the thickness of the first increment of the restorations was studied. Methods: Eighty artificial lower second premolars were divided into two preparation designs with 40 standardized Class II cavities in each, and then restored with four resin composites (three bulk-fill types: SonicFill 2, Filtek Bulk Fill (capsule), Filtek Bulk Fill (syringe) and a conventional nanohybrid resin composite: Premise). Restorations were sectioned for microscopic evaluation and a Kruskal-Wallis analysis was performed to evaluate the number of …
Preparation And Antimicrobial Activity Of Olive Oil Nanoemulsions, Kusuma Jaemsak
Preparation And Antimicrobial Activity Of Olive Oil Nanoemulsions, Kusuma Jaemsak
Chulalongkorn University Theses and Dissertations (Chula ETD)
Due to their health benefits including antioxidant, anti-inflammatory and also antimicrobial activities, extra virgin olive oil (EVOO) has received much attention in food, cosmetics, and pharmaceutical industries. Nanoemulsions (NEs) solubilize and increase absorption and bioavailability of lipophilic substances (i.e. olive oil). However, there is insufficient data in the formation of olive oil NEs. This study aimed to investigate the formation of oil-in-water NEs containing EVOO using low-energy approach and high-energy approach. NEs were characterized for size, polydispersity and zeta potential after storage at different conditions for up to 180 days. They were determined for antimicrobial susceptibility. From the result, NEs …
Halophilic Bacteria From Salty Fermented Foods And Its Bacteriocin Encoding Gene Expression To Use As Biocontrol Agent Against Staphylococcus Aureus In Salt Added Foods, Vishal Chhetri
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research was aimed to isolate, select and apply bacteriocin producing halophilic bacteria from salty fermented foods, Plara (Thai traditional salty fermented fish) and soya sauce as bio-control agent in foods. The isolates having inhibitory activity against different strains of Staphylococcus aureus were selected, identified and characterized prior to application as protective starter in food models. Bacterial communities of Plara and soya sauce samples were studied by two methods, a cultural dependent and cultural independent method (Reverse Transcriptase PCR DGGE (Rev-T PCR-DGGE)), and subsequently sequenced by 16s rDNA analysis. Halanaerobium spp. in Plara and Staphylococcus gallinarum in soya sauce were …
Assessment Of Cadmium Migration Into Groundwater In Mae Sot District, Tak Province Using Monte Carlo Technique, Pongsathorn Thunyawatcharakul
Assessment Of Cadmium Migration Into Groundwater In Mae Sot District, Tak Province Using Monte Carlo Technique, Pongsathorn Thunyawatcharakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Mae Sot is a district in Tak province that confronts Cd contamination within the area. The target organs for Cd exposure was kidneys and skeletal system which could lead to severe health effects such as renal dysfunction, osteoporosis, bone softening, Itai-Itai disease, and lung cancer. The intention of this study was to examine the sorption behavior of nine soil samples in the study area and applied Monte Carlo technique that would increase model efficiency for Cd migration in to the soil profile. Batch adsorption experiments were performed and fitted with the adsorption isotherms as follows: Linear, Langmuir, and Freundlich isotherms. …
Human Health Risk Assessment Of Cadmium Exposure Through Rice Consumption In Mae Tao, Mae Sot District, Tak Province, Parin Suwatvitayakorn
Human Health Risk Assessment Of Cadmium Exposure Through Rice Consumption In Mae Tao, Mae Sot District, Tak Province, Parin Suwatvitayakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Mae Tao sub-district is located in the Mae Tao watershed, an important Cd contaminated area in Thailand. This study was conducted to i) investigate total Cd concentration in rice from households in the Mae Tao sub-district and ii) estimate health risks from Cd exposure through rice consumption. A total number of 159 rice samples were collected from households in all 6 villages of the Mae Tao sub-district. These rice samples were digested with concentrated nitric acid and analyzed by the inductively coupled plasma mass spectrometry (ICP-MS). Biodata information and rice consumption behavior were surveyed from the local residents at the …
Factors Associated With Infant And Under-Five Mortality In Myanmar, Lal Hrin Mawi
Factors Associated With Infant And Under-Five Mortality In Myanmar, Lal Hrin Mawi
Chulalongkorn University Theses and Dissertations (Chula ETD)
Myanmar is committed to achieve unfinished agenda for reducing child mortality, fourth indicator of Millennium Development Goals (MDGs) and global target to achieve under-five mortality rate 25 per 1000 live births in 2030. Moreover, under-five mortality varies across states and regions within the country and the study aims to explore determinants of mortality across different health care planning zones. The results showed that infants who were breastfed had lower risk of death by 11.7 percent comparison with children who were not, and twin or multiple births were more likely to die by 8.1%. Moreover, short preceding birth interval, mothers with …
Effect Of Overall Equipment Effectiveness Improvement Of Corrugating Machine Using Total Quality Management On Carbon Footprint Of Corrugated Board., Long Giang Nguyen
Effect Of Overall Equipment Effectiveness Improvement Of Corrugating Machine Using Total Quality Management On Carbon Footprint Of Corrugated Board., Long Giang Nguyen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Environmental friendly production is an emerging trend in industrial production. Enhancing environmental protection and ensuring company's profitability have gained great attention from manufacturers. The application of Overall Equipment Effectiveness (OEE) using Total Quality Management (TQM) to reflect efficiency of production has been widely implemented in the manufacturing process. However, the full advantage of OEE using TQM techniques as a measure to simultaneously facilitate reduction of carbon dioxide (CO2) emissions and to sustain the existing profitability has not been utilized. This study aimed to investigate the application of OEE using TQM techniques to improve the manufacturing process of corrugated board production …
Effects Of Memory Color On Color Perception Of Natural Objects Under Different Illumination, Nadol Cheawsopon
Effects Of Memory Color On Color Perception Of Natural Objects Under Different Illumination, Nadol Cheawsopon
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to investigate the effects of memory color on color perception of natural objects under different illuminations. A series of experiments were carried out and launched on the Internet through a website (https://memorycolor.net). Seventy-eight observers participated in the experiments. In Experiment 1, observers were asked to provide a typical color of five natural objects (blueberry, broccoli, salmon, sunflower and tomato) based on their memory. The results showed that memory colors were different for different observers. In Experiment 2, observers were shown an image of natural objects and selected the color they perceived. The experimental images of natural objects …
Establishing Buying Decision Model Based On Color Attributes For Durio Zibethinus L., Supawadee Theerathammakorn
Establishing Buying Decision Model Based On Color Attributes For Durio Zibethinus L., Supawadee Theerathammakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Printed images of food products appearing on packaging usually include vivid colors in order to draw the customers' attention and influence their product buying decision. Durian packaging is a vital tool in marketing mix in contributing to buying decision, especially the color that are consistent with customers' expectation. Packaging designers and marketers need to understand how color stimuli impact the customer's buying decision process. This study aims to establish buying decision model based on color attributes for Durio zibethinus cv.Monthong and to evaluate the relationships between "Deliciousness", "Naturalness", and "Attractiveness" and buying decision.The color attributes of durian images, such as …
Classification Models For Stocks' Performance Prediction: A Case Study In Stock Exchange Of Thailand (Set), Athit Phongmekin
Classification Models For Stocks' Performance Prediction: A Case Study In Stock Exchange Of Thailand (Set), Athit Phongmekin
Chulalongkorn University Theses and Dissertations (Chula ETD)
Within stock market, the objective of both stock buyers and sellers is to make profit on price difference based on their expectation on a company's current and future value. There is no investing strategy that is considered to be the best by experts, and investing decision criteria remain contingent upon an individual investor's experiences and bias. To address the challenges, this paper uses financial ratios and company's industry data to construct forecasting models that quantitatively describe the return on stock investment. Various classification models, including Logistic Regression (LR), Decision Tree (DT), Linear Discriminant Analysis (LDA) and K-nearest neighbor are used …