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Articles 1291 - 1320 of 6471
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The Roles Of Catastrophe (Cat) Bonds: Diversifier, Hedge, Or Safe Haven?, Treepatchara Tasnavijitvong
The Roles Of Catastrophe (Cat) Bonds: Diversifier, Hedge, Or Safe Haven?, Treepatchara Tasnavijitvong
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research investigates the role of Catastrophe (CAT) Bonds as diversification tools, hedges, and safe havens in global financial markets, with a focus on their behavior during the global financial crisis and the Covid-19 crisis. The study reveals that CAT bonds, recognized as a valuable asset class for their unique structure and ability to transfer catastrophic risks, have gained prominence among institutional investors. By examining the diversification benefits of CAT bonds in relation to traditional assets and analyzing their performance in crisis and non-crisis periods, the research highlights CAT bonds as effective tools for risk management and portfolio diversification. The …
Perception And Experiences Of Sexual Harassment Among Lgbtq Students In Universities, Bangkok Thailand, Jiratchaya Rungrote
Perception And Experiences Of Sexual Harassment Among Lgbtq Students In Universities, Bangkok Thailand, Jiratchaya Rungrote
Chulalongkorn University Theses and Dissertations (Chula ETD)
The purpose of this research was to study perceptions and experiences of sexual harassment among 355 LGBTQ students in the University. Data was collected by self-administer questionnaire to find perceptions and experiences of sexual harassment. Descriptive, Pearson’s Chi-square and Fisher exact were performed to describe and determine the associations. The research findings indicate that the majority of research participants were perceived to sexual harassment at a moderate level. There was a moderate tolerant attitude towards sexual harassment, and there were experiences of verbal, non-verbal, and physical sexual harassment at a moderate level. Gender, University, part-time job type, the use of …
Effectiveness Of Tendingpets Application On Working Memory Among Adolescent In Phrae Province, Thailand : A Quasi-Experimental Study, Phitchasuda Detboon
Effectiveness Of Tendingpets Application On Working Memory Among Adolescent In Phrae Province, Thailand : A Quasi-Experimental Study, Phitchasuda Detboon
Chulalongkorn University Theses and Dissertations (Chula ETD)
Working memory performance refers to the capacity and ability of the brain to temporarily remember and process incoming information while working or solving problems. This competency is crucial for teenagers and is linked to success in learning mathematics, English language, and health-related behaviors. This quasi-experimental research, conducted with a controlled group, aims to explore the effectiveness of the "TendingPETs" application in enhancing working memory capacity and its impact on educational effectiveness and risky behavior among 99 teenagers in Phrae Province, Thailand. The participants were divided into an experimental group of 50 individuals who used the "TendingPETs" application alongside regular classroom …
Factors Associated With Glycemic Control Level Among Type 2 Diabetes Mellitus Patients At Public Health Centers In Bangkok, Thailand, Uraiwan Thamkhuru
Factors Associated With Glycemic Control Level Among Type 2 Diabetes Mellitus Patients At Public Health Centers In Bangkok, Thailand, Uraiwan Thamkhuru
Chulalongkorn University Theses and Dissertations (Chula ETD)
Background: Type 2 Diabetes Mellitus becomes a major health problem in many countries. Consequently, Type 2 DM is one of important public health problems in Thailand. In 2019, there are 14,025 registered cases of Type 2 DM that received health care services at 68 Public Health Centers, Bangkok Metropolitans Administration while 7,283(52%) of them were uncontrolled blood sugar; HbA1C ≥ 7% , and 6,742 (48%) were control blood sugar level; HbA1C <7% (BMA, 2019). Objective: This study aims to determine the proportion of uncontrolled and controlled level of glycemic control, to explore levels of self-efficacy, self-care behaviors, and social support, and to identify the influencing factors on Glycemic Control among Type 2 DM patients at Public Health Centers in Bangkok, Thailand. Last, this study aims to describe which social support channels that Type 2 DM patients at Public Health Centers in Bangkok, Thailand acquires. Method: A Cross-sectional Study was used in this study. 411 participants from 5 Public Health Centers, Bangkok Metropolitan Administration (BMA) was conducted in this study by face-to-face interview based on the questionnaire. Sampling technique, this study used purposive sampling and simple random sampling technique. Descriptive statistics were used to describe the characteristics of participants. The bivariate analysis was used to identify factors associated (a crude odds ratio) with glycemic control level (p-value < 0.2). A multivariable model (binary logistic regression analysis) was used to identify factors associated (an adjusted odds ratio) with the dependent variable (glycemic control level). The association was declared significant at p-value < 0.05. Result: 214 (52.1%) of participants were controlled glycemic level (HbA1C<7%), while 197(47.9%) of participants were uncontrolled glycemic level (HbA1C ³ 7%). Most of the Participants had medium self-efficacy 248(60.3), medium self-care behavior 248(60.3), and moderate social support 129(31.4). Adjusted Odds Ratio of uncontrol glycemic control increased with higher level of self-efficacy, self-care behavior, and social support. 110(55.8) of participants who acquired social support from the doctor (secondary social support group) with control glycemic level (HbA1C <7%). 52(44.4) of participants who acquired social support from their family (primary social support group) with control glycemic level (HbA1C <7%). Conclusion: The findings of this study could be used to develop an intervention program for Type 2 DM patients, patient group, family, friends, and public health volunteers at Public Health Centers in Bangkok (BMA)in order to improve the glycemic control level.
Association Between Knowledge, Attitude, Barriers, And Practice Of Parents Regarding Children’S Malocclusion In Yangon, Myanmar, Ye Htet Aung
Chulalongkorn University Theses and Dissertations (Chula ETD)
dren and can lead to psychological impacts. Therefore, this study aimed to investigate the association between knowledge, attitude, barriers, and practices of parents toward malocclusion in children. This cross-sectional study was conducted on parents, aged between 20 and 50 years, having children aged between 6 and 12 years, and living in Yangon, Myanmar. Parental socio-demographic characteristics, knowledge, attitudes, barriers, and practices regarding malocclusion in their children were surveyed and collected through an online validated self-administered questionnaire. A total of 388 participants aged from 21 to 50 years completed the survey questionnaire. The average scores of parental knowledge, attitude, and practice …
Livelihoods In Motion : A Case Study Of Housekeepers As Informal Workers In Bangkok, Kittipon Phummisuttikul
Livelihoods In Motion : A Case Study Of Housekeepers As Informal Workers In Bangkok, Kittipon Phummisuttikul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Transportation planning research often overlooks the distinct needs of informal domestic workers. This study focuses on live-out housekeepers in Bangkok and examines how their mobility, work characteristics, and socioeconomic status affect their livelihoods. The study used non-probability sampling methods, including convenience, snowball, and purposive sampling. Data from 61 respondents were collected through surveys and semi-structured in-depth interviews and were analyzed using descriptive statistics, crosstabulation, inferential statistics (ANOVA), and word cloud analysis. The study found that live-out housekeepers in Bangkok face high mobility, adaptability, and uncertainty levels. The research highlights the challenges that housekeepers face as informal workers, emphasizing the impact …
Common Ticketing Systems : Case Studies Of Bangkok, Fukuoka, Singapore, And Sydney, Tam Viet Hoang
Common Ticketing Systems : Case Studies Of Bangkok, Fukuoka, Singapore, And Sydney, Tam Viet Hoang
Chulalongkorn University Theses and Dissertations (Chula ETD)
No abstract provided.
Development Of Electrochemical Methods For Determination Of Cannabinoids In Cannabis, Tavechai Pholsiri
Development Of Electrochemical Methods For Determination Of Cannabinoids In Cannabis, Tavechai Pholsiri
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis focuses on the development of electrochemical devices for the determination of major cannabinoids in various samples obtained from cannabis such as cannabis oil, cannabis flower, and body fluids such as saliva. The developed electrochemical device comprises three distinct platforms, each platform a crucial role in solving the cannabis-related challenges in Thailand. These devices are instrumental in controlling the quality of cannabis products, ensuring the quality of cannabis flowers intended for medical use, and screening individuals who smoke cannabis within legally regulated areas. This thesis can be segmented into three parts, each focusing on addressing specific aspects of the …
Identification And Functional Characterization Of Myb Transcription Factors Regulating Flavonoid Biosynthesis In Durian Durio Zibethinus L. Pulps, Kamonwan Weerawanich
Identification And Functional Characterization Of Myb Transcription Factors Regulating Flavonoid Biosynthesis In Durian Durio Zibethinus L. Pulps, Kamonwan Weerawanich
Chulalongkorn University Theses and Dissertations (Chula ETD)
Durian fruit possesses high nutritional value due to its enriched bioactive compounds such as phenolics, carotenoids, and vitamins. While various transcription factors (TFs) regulate the phenylpropanoid biosynthetic pathway, MYB TFs play a pivotal role in controlling key genes in this pathway. In this study, we identified candidate v-Myb myeloblastosis viral oncogene homolog, MYB TFs from our transcriptome database of the Monthong cultivar including five developmental/postharvest ripening stages. MYBs that were upregulated during the ripening stage were considered as candidate transcriptional activators, based on the positive correlation observed between flavonoid biosynthetic genes and flavonoid contents in ripe durian pulps. Conversely, MYBs …
Aroma Components And Antioxidative Activity Of Thua Nao From Black Soybean With Bacillus Subtilis, Pakavit Mathatheeranan
Aroma Components And Antioxidative Activity Of Thua Nao From Black Soybean With Bacillus Subtilis, Pakavit Mathatheeranan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Thua nao is a fermented soybean product that is widely consumed, especially in the northern part of Thailand. Thua nao can be used as a condiment to enhance the aroma and flavor of foods. In this study, stir bar sorptive extraction (SBSE) coupled with gas chromatography‒mass spectrometry/olfactometry (GC‒MS/O) was used to analyze volatile aroma compounds in thua nao products. Thua nao fermented with commercial Bacillus subtilis under controlled conditions exhibited the presence of compounds such as 2-methyl butanoic acid, phenylethyl alcohol, benzaldehyde, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, and 2-methoxy phenol. These compounds contributed to an increase in fermented/sour, floral, almond-like, nutty, and wood …
Effect Of Retarders On Geopolymerization Process Of Fly Ash-Based Geopolymer, Naritsara Toobpeng
Effect Of Retarders On Geopolymerization Process Of Fly Ash-Based Geopolymer, Naritsara Toobpeng
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aims to investigate the effect of additives on the geopolymerization of the fly ash-based geopolymer. The ratios of sodium silicate and sodium hydroxide (S/NX and solid FA to activator (F/L) were observed by varying the S/N at 1.0-2.5 wt.% and the F/L at 0.5-3.3 wt%. Results demonstrated that the highest strength was given by the S/N and F/L at 1.0 and 2.0, respectively. These ratios were used to study the effect of fourteen additives of the setting times of geopolymer pastes. Each additive was incorporated into the pastes by two mixing methods including wet and dry-mixing. The pastes …
3d Printing Of Hydroxyapatite/Polyhydroxyalkanoate-Based Composites, Warrayut Kanabenja
3d Printing Of Hydroxyapatite/Polyhydroxyalkanoate-Based Composites, Warrayut Kanabenja
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis focuses on developing bio-based 3D printing feedstocks for biomedical applications, such as bone scaffolds and soft tissue. However, their utility is limited by a narrow processing window which challenges manipulating filament size. These issues result in discontinuous flow and incomplete deposition of melted PHB. In part one, PHB and PHBV were blended with PLA and PBAT to enhance their processability and printability. The polymer blends exhibited lower crystallization temperature and degree of crystallinity. Assessing their 3D printability, neat PHB and PHBV filaments experienced, poor flow during extrudate deposition, and significant warping, leading to 3D printing failures. The blends …
Territorial Behavior Of Immature Pink Skunk Clownfish Amphiprion Perideraion In Artificial Substrate, Nattanon Soonthornharuethai
Territorial Behavior Of Immature Pink Skunk Clownfish Amphiprion Perideraion In Artificial Substrate, Nattanon Soonthornharuethai
Chulalongkorn University Theses and Dissertations (Chula ETD)
Anemonefish (Amphiprion and Premnas spp.) are renowned for their territorial nature, typically associated with sea anemones but capable of adapting to various substrates, including artificial ones. Despite their widespread popularity in aquariums, detailed documentation of their juvenile territorial behaviors remains limited. This study investigates the territorial behaviors—specifically side-by-side swimming, face-to-face swimming, attack biting, biting, and lunging—of immature pink skunk clownfish (Amphiprion perideraion) in different artificial substrates. Conducted at Si Racha Fishery Research Station, the experiment utilized six pairs of A. perideraion designated as residents. These fish were subjected to three substrate conditions: fake sea anemone, ceramic tiles, and an empty …
Correlation Between Meteorological Conditions, Pm2.5, And Covid-19 Mortality In Thailand, Viranphat Singrakphon
Correlation Between Meteorological Conditions, Pm2.5, And Covid-19 Mortality In Thailand, Viranphat Singrakphon
Chulalongkorn University Theses and Dissertations (Chula ETD)
The appearance of a new strain of coronavirus led to a worldwide health crisis, affecting public health and economies globally, including Thailand since 2019. Previous research had suggested possible links between environmental factors and the surge in COVID-19 cases, but these connections remained uncertain. This study examined the ratios of indoor to outdoor (I/O) environments and investigated potential associations between fine particulate matter (PM2.5), meteorological conditions, and the Case Fatality Rate (CFR%) of COVID-19 in Bangkok and its surrounding metropolitan area from January to December 2021. Through Spearman’s Rank correlation analysis, the findings indicated a positive correlation between CFR% and …
In Silico And In Vitro Studies On Inclusion Complex Of 8-Bromobaicalein With Beta-Cyclodextrins, Noriyuki Yasuda
In Silico And In Vitro Studies On Inclusion Complex Of 8-Bromobaicalein With Beta-Cyclodextrins, Noriyuki Yasuda
Chulalongkorn University Theses and Dissertations (Chula ETD)
Baicalein (5,6,7-trihydroxyflavone), an active compound derived from Scutellaria baicalensis Georgi, exhibits notable anti-inflammatory, antiviral, and anticancer properties. 8-bromobaicalein (BB), a derivative of baicalein, possesses even stronger cytotoxic activity against MCF-7 human breast cancer cell lines. However, its low water solubility limits its use for further applications. In this study, we investigated βCD and its derivatives (hydroxypropyl-β-cyclodextrin (HPβCD) and 2,6-di-O-methyl-β-cyclodextrin (DMβCD)) for their ability to improve the solubility of BB through inclusion complexation. From molecular dynamics simulations and MM/GBSA-based and SIE-based binding free energy calculations, we determined that DMβCD exhibited the highest efficacy as a host molecule for the inclusion complexation …
Synthesis Of Photosensitizers With Aggregation-Induced Emission Properties, Satawat Ngampattrapan
Synthesis Of Photosensitizers With Aggregation-Induced Emission Properties, Satawat Ngampattrapan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Conventional photosensitizers used in photodynamic therapy often suffer from aggregation-caused quenching (ACQ) due to their planar structure. This study presents the design and synthesis of a donor-acceptor-donor (D-A-D) photosensitizer with aggregation-induced emission (AIE) properties, which effectively eliminates the ACQ problem. The photosensitizers were synthesized using a Suzuki coupling and Knoevenagel condensation reaction, with triphenylamine as the donor and dicyano vinyl and 2-(2,6-dimethyl-4H-pyran-4-ylidene)malononitrile as acceptors. The donor was connected with a thiophene, 2,1,3-benzothiadiazole, and double bond spacers. Novel 7 photosensitizers were obtained with more than 40%yield. Photosensitizers with spacers containing electron-donating or withdrawing effects could enhance the absorption properties of photosensitizers …
Bioactive Compounds From Holy Basil (Ocimum Tenuiflorum L.) Against Angiotensin-Converting Enzyme2 (Ace2), Sirinat Chalkual
Bioactive Compounds From Holy Basil (Ocimum Tenuiflorum L.) Against Angiotensin-Converting Enzyme2 (Ace2), Sirinat Chalkual
Chulalongkorn University Theses and Dissertations (Chula ETD)
The present study aimed to discover bioactive compounds 3 types of holy basil and clove basil that could inhibit SARS-CoV-2 binding to the Angiotensin-converting enzyme 2 receptors (ACE2) and prohibiting the virus from penetrating into the host cells. The leaves and stem of 3 types of holy basils and clove basil were extracted separately through steam-distillation, liquid-liquid extraction and column chromatography and all extracts were characterized by GC/MS and NMR spectrometry and examied their ACE2 inhibitory activity. Essential oils and water phase of red holy basil showed the highest inhibition with IC50 values of 0.026 and IC50 0.310 microgram per …
Identification Of Volatile Markers In Sweat For Screening Of Covid-19 Infection By Gas Chromatography-Mass Spectrometry, Suriwipa Chuachaina
Identification Of Volatile Markers In Sweat For Screening Of Covid-19 Infection By Gas Chromatography-Mass Spectrometry, Suriwipa Chuachaina
Chulalongkorn University Theses and Dissertations (Chula ETD)
Due to an outbreak of coronavirus spreading in recent years, there is an urgent need for effective, rapid, and non-invasive diagnostics to detect and differentiate among patients who are infected and uninfected with SARS-CoV-2 for controlling the virus propagation. This study developed an alternative method for COVID-19 screening from volatile analysis of metabolites mainly studied in sweat samples obtained from the populations in Bangkok, Thailand, during December 2020 to April 2022. A total of 140 collected samples tested by RT-PCR; 70 positives and 70 negatives confirmed COVID-19 cases were applied to be separated, detected, and identified as volatile organic compounds …
Effects Of Tidal Variations On Nutrient Dynamics In The Chao Phraya River Estuarine Ecosystem, Korawee Khongmanont
Effects Of Tidal Variations On Nutrient Dynamics In The Chao Phraya River Estuarine Ecosystem, Korawee Khongmanont
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Chao Phraya River estuary is a coastal ecosystem that is very important for both ecological and economic services. Moreover, it is a very complex and constantly changing ecosystem due to pollution loading from human activities through the river freshwater runoff. On the other hand, the Chao Phraya River estuary is also polluted by the influence of tidal currents of the inner Gulf of Thailand. One of the most important and persistent problems in this ecosystem is eutrophication and its effects. Therefore, the present study is aimed to improve “how freshwater runoff and tidal phenomena are affecting nutrient dynamics in …
Identification And Characterization Of Bacteriophages For Phage Cocktail Formulation Specific To Uropathogenic Escherichia Coli, Pattida Kongsomboonchoke
Identification And Characterization Of Bacteriophages For Phage Cocktail Formulation Specific To Uropathogenic Escherichia Coli, Pattida Kongsomboonchoke
Chulalongkorn University Theses and Dissertations (Chula ETD)
Urinary tract infections (UTIs) are commonly found in elderlies, infants, hospitalized patients, and most women. UTIs are caused by a variety of pathogens with uropathogenic Escherichia coli (UPEC) is mostly prevalence. Even though UPEC can be treated with several antibiotics, the rapid emergence of multidrug resistant (MDR)-UPEC renders the antibiotic treatment no longer successful. Therapy using phages, which are bacterial viruses, has been considered but it is limited by bacterial resistance that develops during evolution. Fortunately, the suppression of phage resistance can be improved when used several phages as a cocktail. Here, I aim to formulate an efficient phage cocktail …
Fecal Microbiome In Lead-Exposed Industrial Workers, Chatchawan Praditwongsin
Fecal Microbiome In Lead-Exposed Industrial Workers, Chatchawan Praditwongsin
Chulalongkorn University Theses and Dissertations (Chula ETD)
Lead exposure in industrial environments poses serious health risks. While its detrimental effects on human health are well-known, the connection between lead exposure and alterations in the fecal microbial community remains largely unexplored, highlighting a critical gap in our understanding of its wider health implications. This study explores the fecal microbiota of workers in a lead-utilizing factory, comparing individuals with blood lead levels (BLLs) above and below 3.06 µg/dL, and between those exposed to lead and those not exposed. The results demonstrate a strong correlation between lead exposure and BLLs, especially at levels below 3.06 µg/dL, with significant changes noted …
การเปรียบเทียบวิธีการกรองแบบอิงเนื้อหาและการกรองแบบร่วมกันสำหรับการแนะนำสินค้าในธุรกิจออนไลน์ประเภทเสื้อผ้าแฟชั่น, จิรายุส ไพรสมพงษ์
การเปรียบเทียบวิธีการกรองแบบอิงเนื้อหาและการกรองแบบร่วมกันสำหรับการแนะนำสินค้าในธุรกิจออนไลน์ประเภทเสื้อผ้าแฟชั่น, จิรายุส ไพรสมพงษ์
Chulalongkorn University Theses and Dissertations (Chula ETD)
ในปัจจุบันธุรกิจการค้าขายบนโลกออนไลน์บนแพลตฟอร์มต่าง ๆ เกิดขึ้นเป็นจำนวนมาก เนื่องจากการพัฒนาของเทคโนโลยีสารสารสนเทศที่เข้ามามีบทบาทต่อสังคมมากขึ้น และธุรกิจหนึ่งที่จัดว่าเป็นที่นิยมในโลกออนไลน์นั้นก็คือธุรกิจขายเสื้อผ้า เนื่องจากเป็นสิ่งของจำเป็นที่ขายง่าย ใช้เงินลงทุนไม่มาก และเริ่มต้นได้เร็ว โดยเฉพาะอย่างยิ่งเสื้อผ้าแฟชั่นที่มีการเปลี่ยนแปลงความนิยมตามช่วงเวลา ทำให้ปัญหาของธุรกิจนี้ คือเจ้าของร้านค้าไม่สามารถทราบความต้องการของลูกค้าทำให้เกิดสินค้าค้างในคลังจำนวนมาก เกิดเป็นค่าเสื่อมและค่าเสียโอกาสทางธุรกิจ ท้ายที่สุดก็ขาดทุนและปิดกิจการ การเข้ามาของเทคโนโลยีนำมาซึ่งประโยชน์มากมาย ผู้ผลิตและผู้จัดจำหน่ายจำเป็นจะต้องอาศัยสิ่งเหล่านี้มาช่วยในการตัดสินใจทางธุรกิจเพื่อเป้าหมายของธุรกิจนั้นก็คือการสร้างกำไรสูงสุด และลดจำนวนสินค้าที่ค้างอยู่ในคลัง โดยหนึ่งในวิธีที่ช่วยแก้ปัญหานั้นก็การใช้ประโยชน์จากข้อมูลที่ถูกจัดเก็บโดยธุรกิจ ซึ่งก่อนจะนำมาใช้ประโยชน์จะต้องผ่านกระบวนการประกอบไปด้วยการเก็บข้อมูล การเตรียมข้อมูล การสำรวจและวิเคราะห์ข้อมูล และการแสดงผลข้อมูลที่ช่วยตัดสินใจ สำหรับโครงงานนี้ได้มุงเน้นไปยังการใช้ประโยชน์จากข้อมูลเพื่อพัฒนาระบบแนะนำให้กับธุรกิจ ซึ่งทำเป็นในลักษณะงานวิจัยที่เป็นการเปรียบเทียบเทคนิคการพัฒนาระบบแนะนำ โดยบทบาทของระบบนี้จะจับพฤติกรรมลูกค้าที่เข้ามาใช้งานในระบบก่อนจะแนะนำสินค้าที่คาดว่าจะเหมาะสมให้กับลูกค้าคนนั้น ๆ
Momentum Effect On Equity Return Derived By Esg Performance, Evidence From Japanese Equity Market, Sathaporn Tiensermsub
Momentum Effect On Equity Return Derived By Esg Performance, Evidence From Japanese Equity Market, Sathaporn Tiensermsub
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study delves into the intricate relationship between Environmental, Social, and Governance (ESG) performance and equity returns within the Japanese market, with a specific emphasis on the momentum effect. Leveraging an extensive dataset encompassing the environmental, social, and governance pillars, our research contributes to the existing body of literature on ESG investing. Our analysis reveals consistent patterns in ESG-momentum interactions, aligning with the findings of previous studies while also offering new insights into the Japanese equity market. Consistent with the research of Chen & Yang (2020), Pedersen et al. (2021), and Luo (2022), our findings affirm that specific quintiles within …
Bitcoin Algorithmic Trading Using Rsi And Stoch Technical Indicators, Pattrapon Chucheepchuenkamon
Bitcoin Algorithmic Trading Using Rsi And Stoch Technical Indicators, Pattrapon Chucheepchuenkamon
Chulalongkorn University Theses and Dissertations (Chula ETD)
Algorithmic trading helps traders automate their trading decisions using computer programs. One widely used approach is to employ technical indicators such as the Relative Strength Index (RSI) and the Stochastic Oscillator (Stoch) to identify overbought and oversold conditions in the market. This paper studies various strategies using RSI and Stoch indicators, i.e., buying in an oversold market and selling in an overbought market, and analyzes their impact on changing market conditions, such as bullish, bearish, and sideways markets. Specifically, the paper proposes comparing five trading strategies: RSI-only strategy, Stoch-only strategy, RSI-and-Stoch strategy, RSI-or-Stoch strategy and buy-and-hold strategy and finding their …
Computational Fluid Dynamics Simulation Of Glycerol Steam Reformer Packed With Nonuniform Foam Catalyst, Thanawee Siripreedapat
Computational Fluid Dynamics Simulation Of Glycerol Steam Reformer Packed With Nonuniform Foam Catalyst, Thanawee Siripreedapat
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study investigates the performance of a fixed bed reactor packed with a foam catalyst with non-uniform porosity for hydrogen production from glycerol steam reforming. COMSOL Multiphysics software was employed to model the reactor. The first scenario compared the pellet catalyst with industrial foams with different porosities (i.e., 10, 20, and 30 PPI). The second scenario adjusted the porosity of the industrial foam by rearranging porosity in the reactor's axial, then comparing performance, cost-effectiveness, and economic feasibility. The foam catalyst's open-cell structure allowed a maximum H2 yield of 65.95% using a reactor length five times shorter than pellet and a …
Systematic Analysis Of Covid-19 Consequences: Health, Economic, And Tourism Aspects, Kumpol Saengtabtim
Systematic Analysis Of Covid-19 Consequences: Health, Economic, And Tourism Aspects, Kumpol Saengtabtim
Chulalongkorn University Theses and Dissertations (Chula ETD)
In 2020, our world faced the impact of the COVID-19 situation, which caused a lot of harm and consequences in multiple aspects. Many organizations and sectors were affected a lot by the pandemic. This research performed a holistic analysis to extract the lessons learned based on health, economic, and tourism consequences. Both qualitative and quantitative methodologies were used to extract the best approach to prepare for the next pandemic. For the health aspect, the stepwise regression was used to extract the potential IHR States Parties Self-Assessment Annual Report (SPAR) health capacity provided by the World Health Organization (WHO) to deal …
Ethylene Polymerization With Zirconocene/Methylalumoxane Catalyst On Mesocellular Foam Silica Support, Thanapoom Osathalert
Ethylene Polymerization With Zirconocene/Methylalumoxane Catalyst On Mesocellular Foam Silica Support, Thanapoom Osathalert
Chulalongkorn University Theses and Dissertations (Chula ETD)
Silica is commonly used as a support material in metallocene catalytic systems (MTC). The silica-mesocellular foam (MCF-Si) is a three-dimensional spherical pore structure of silica. At present, MCF-Si is utilized as a catalyst support in a variety of chemical reactions, but for metallocene catalytic support, it has been less common. This research has two parts. Firstly, the feasibility of employing MCF-Si as a support material in metallocene catalytic systems was demonstrated through the investigation of methylaluminoxane (MAO) cocatalysts supported on two distinct types of structured mesoporous silica supports, namely Cab-Si and MCF-Si, in ethylene polymerization and ethylene/1-hexene copolymerization. In the …
Classification Of Android Malware From Binary Code Using Ensemble Method With Recursive Feature Elimination, Nawa Tippayasem
Classification Of Android Malware From Binary Code Using Ensemble Method With Recursive Feature Elimination, Nawa Tippayasem
Chulalongkorn University Theses and Dissertations (Chula ETD)
In response to the burgeoning Android market and the concurrent proliferation of both applications and malware, we propose a direct analysis approach to classify Android malware by examining bytecode extracted from DEX files. The prevalent use of obfuscation techniques by malicious actors underscores the need for robust methods to detect and analyze malware. Leveraging the frequency of bi-gram and tri-gram patterns within the bytecode, we employ recursive feature elimination with TF-IDF, alongside XGB, RF, and voting classifiers, to enhance detection capabilities. Our study, conducted using the CICAndMal2017 dataset, highlights the effectiveness of this approach, with XGB classifier utilizing the top …
Development Of Environmentally Friendly Dental Waste Transportation Method In Myanmar, Phyo Thiri Kyaw
Development Of Environmentally Friendly Dental Waste Transportation Method In Myanmar, Phyo Thiri Kyaw
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study delves into dental waste management practices in Yangon City, Myanmar, with a primary focus on optimizing waste transportation routes for environmental sustainability. Through a comprehensive survey of 13 dental clinics in each of the 13 townships in the Western Yangon District, the research employs a blend of quantitative and qualitative methods, including survey, GIS analysis and observational studies. The optimization cases explore diverse strategies for waste transportation routes, revealing that Cases 2 and 3 surpass the baseline scenario in terms of travel distance. These tailored optimization strategies showcase the effectiveness of creating environmentally friendly waste collection routes for …
Generating Synthetic Population Using Transformer-Based Networks, Phattranit Phattharajiranan
Generating Synthetic Population Using Transformer-Based Networks, Phattranit Phattharajiranan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Population synthesis is a critical component of policy analysis and planning, yet it faces challenges in data availability and synthesis quality. This study addresses these issues by introducing a novel population synthesis framework named “PopSyner”, capable of utilizing both aggregated and disaggregated data. Leveraging advancements in deep generative models, particularly Transformer-based architectures, PopSyner demonstrates superior performance in generating synthetic populations compared to existing methods like synthetic reconstruction (SR) and conditional tabular generative adversarial network (CTGAN). Our experiments show that PopSyner-TFM, the Transformer-based variant of PopSyner, produces synthetic populations with enhanced diversity and distributional similarities, closely resembling real data. This research …