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Estimation Of Burned Severity Areas Using Landsat8 Data From 2016 To 2022 In Chiang Mai Province, Sarunya Karuna Jan 2025

Estimation Of Burned Severity Areas Using Landsat8 Data From 2016 To 2022 In Chiang Mai Province, Sarunya Karuna

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aims to evaluate the area and severity of wildfire damage in Chiang Mai Province using LANDSAT8 satellite data from 2016, 2018, 2020, and 2022, and to analyze the relationship between spatial factors, namely the Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST), with fire occurrence and severity. The study utilized hotspot data analysis in conjunction with the Differenced Normalized Burn Ratio (dNBR) index to assess the area and classify fire severity levels, while also analyzing pre-fire and post-fire NDVI and LST values to identify correlations. The results indicated that 2020 experienced the most severe fire situation, …

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Data-Driven Predictive Model For Various Shapes Of Gold Nanoparticle Synthesis Based On Self-Organizing Maps, Thanapol Khamhla Jan 2025

Data-Driven Predictive Model For Various Shapes Of Gold Nanoparticle Synthesis Based On Self-Organizing Maps, Thanapol Khamhla

Chulalongkorn University Theses and Dissertations (Chula ETD)

This work presents a machine learning framework that simultaneously classifies the shape and predicts the localised surface plasmon resonance (LSPR) wavelength of gold nanoparticles (AuNPs) purely from synthesis conditions. The dataset used to train the model consist of synthesis conditions and the corresponding AuNPs characteristics, including spherical, star, plate, and rod shapes with their measured LSPR wavelengths, were compiled from existing literatures. Our model first classifies synthesis conditions into clusters according to their resulting shape and then builds local regression models for each shape, enabling both classification and quantitative prediction within a single framework. The proposed model integrates the clustering …

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Scam Slayer : A Gamification For Creating A Cyber Scam Awareness, Xin Lyu Jan 2025

Scam Slayer : A Gamification For Creating A Cyber Scam Awareness, Xin Lyu

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study explores how gamified learning can enhance the ability to recognize and prevent online fraud. The research team developed a role-playing educational game, Scam Slayer, using Ren’Py, integrating five common fraud scenarios and an Anti-Fraud Assistant to create an immersive and reflective learning experience. Analysis of a pre-game survey with 400 participants and a post-game survey with 40 players shows significant improvements in fraud recognition and alertness, with no demographic differences in learning outcomes. Participants also reported high satisfaction with the game’s narrative and educational value, suggesting that gamified learning can serve as an effective complement to traditional online …

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Heat Treatment Of Basaltic-Related Sapphire From Binh Thuan Deposit, Southern Vietnam, Yuparat Kwangsawat Jan 2025

Heat Treatment Of Basaltic-Related Sapphire From Binh Thuan Deposit, Southern Vietnam, Yuparat Kwangsawat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Characteristics of basalt-related sapphires from Binh Thuan in Southern Vietnam were investigated before and after heat treatment. Samples were divided into four group, based on their color and hue including dark blue, blue, greenish blue, and bluish green. After being heated at 700-1000°C, sapphires' blue hue faded noticeably. Blue color turned to be intensified when heated at 1650°C. Subsequently, beryllium-assisted heating by a local professional gem treater was introduced to these sapphire samples which in turn yielded yellow to yellowish-blue hues. Color changes after heating are conclusively involved by trace compositions of sapphire and temperatures of heating. The appropriate treatment …

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Expression Of Peroxisome Proliferator-Activated Receptor Alpha In Feline Mammary Carcinomas, Ngoc Anh Van Pham Jan 2025

Expression Of Peroxisome Proliferator-Activated Receptor Alpha In Feline Mammary Carcinomas, Ngoc Anh Van Pham

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to investigate the expression patterns of peroxisome proliferator-activated receptor alpha (PPARα) in normal tissue and feline mammary carcinomas. Thirty feline mammary carcinomas (FMCs) and eight normal mammary tissues were used in this study. In the same FMC cats, tissues were collected from 2 regions which are the neoplastic tissue and the adjacent non-neoplastic tissues. The study was composed of three parts: (1) clinical data collection and histopathological diagnosis; (2) Immunohistochemistry (IHC) evaluation of PPARα, Ki-67, and proliferating cell nuclear antigen (PCNA); and (3) Western blot analysis of PPARα isoforms. The results revealed no significant differences in PPARα …

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Community Ecology Of Domestic Animals And Wildlife At Solid Waste Disposal Sites Near Dong Phayayen – Khaoyai Forest Complex And Its Impacts On Zoonotic Diseases, Paisin Lekcharoen Jan 2025

Community Ecology Of Domestic Animals And Wildlife At Solid Waste Disposal Sites Near Dong Phayayen – Khaoyai Forest Complex And Its Impacts On Zoonotic Diseases, Paisin Lekcharoen

Chulalongkorn University Theses and Dissertations (Chula ETD)

Solid waste disposal sites (SWS) at forest edges represent critical zoonotic transmission hotspots where wildlife, domestic animals, and humans converge. This study characterized host community structure, pathogen circulation, and network topology at SWS adjacent to the Dong Phayayen-Khao Yai Forest Complex, Thailand. Three study phases (2021-2023) comprised: (1) camera trapping at five SWS (3,907 trap-nights); (2) small mammal trapping across four habitats (1,420 individuals, 12 species), ectoparasite collection (20,560 chiggers, 14 species), and molecular pathogen detection; and (3) network analysis of connectivity among habitat, host, chigger, and pathogen. Domestic dogs dominated communities (88.3%), creating simplified assemblages. Potential transmission operated through …

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Expression Patterns Of Alpha-Fetoprotein And Phosphodiesterase 4d In Canine Mammary Tumors, Thi Kieu Trinh Mai Jan 2025

Expression Patterns Of Alpha-Fetoprotein And Phosphodiesterase 4d In Canine Mammary Tumors, Thi Kieu Trinh Mai

Chulalongkorn University Theses and Dissertations (Chula ETD)

Canine mammary tumors (CMTs) represent one of the most common neoplasms in female dogs, with a substantial proportion exhibiting malignant behavior and aggressive progression. Despite their clinical importance and relevance to comparative oncology, the molecular mechanisms underlying CMT development remain incompletely understood. This study aimed to evaluate the expression patterns of alpha-fetoprotein (AFP) and phosphodiesterase 4D (PDE4D) in canine mammary tissues, and to investigate their correlations with Ki-67, a standard marker of cell proliferation. A total of 50 dogs were included in this study (40 diagnosed with CMTs and 10 without CMTs), yielding 90 FFPE tissue samples for protein analysis …

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Ideologies And Fears As Mechanisms Of Military Regime Legitimation : A Comparative Analysis Of Sarit Thanarat In Thailand And Ne Win In Burma, Hyeon-Min Kim Jan 2025

Ideologies And Fears As Mechanisms Of Military Regime Legitimation : A Comparative Analysis Of Sarit Thanarat In Thailand And Ne Win In Burma, Hyeon-Min Kim

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis examines how Sarit Thanarat in Thailand and Ne Win in Burma legitimized their military regimes through ideological narratives and threat discourses. Both leaders, who came to power through coups d’état without democratic legitimacy, sought to justify their authoritarian military rules by constructing discourses that transformed coercion into moral guardianship. Sarit emphasized traditional Thai values, lak-thai, aligning them with the monarchy and anti-communism to portray his military regime as the protector of national identity. Ne Win, by contrast, promoted Burman ethno-nationalism and the Burmese Way to Socialism and emphasized the Burmese Armed Forces (Tatmadaw)’s role in safeguarding the unity …

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The Representation Of The Lgbtq2+ Community In The Context Of Pride Month In Thai Online Media From 2022 To 2025, Julia Borawska Jan 2025

The Representation Of The Lgbtq2+ Community In The Context Of Pride Month In Thai Online Media From 2022 To 2025, Julia Borawska

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis examines the representation of Thai Pride Month and the LGBTQ+ community in Thai online media between 2022 and 2025. It provides a comprehensive analysis of content featured on both individual- and organization-based media, distinguishing between social media and mainstream news outlets. Within the social media sphere, the study further differentiates between influential Thai celebrities—particularly actors and actresses involved in queer-portraying productions—and organizational entities involved in LGBTQ+ advocacy as well as BL/GL production companies. The first two groups rarely feature queer-related content or express explicit support for Pride Month and the LGBTQ+ community, choosing to engage only when personally …

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An Empirical Study Of Immersive Technology Using Desktop Augmented Reality Software For Primary School In Thailand, Orakarn Laoharutanun Jan 2025

An Empirical Study Of Immersive Technology Using Desktop Augmented Reality Software For Primary School In Thailand, Orakarn Laoharutanun

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research investigates learner engagement and reuse intention in immersive learning environments through the development and evaluation of a Desktop Augmented Reality (Desktop AR) application designed for primary school students in Thailand. Grounded in the 5E instructional model and the immersive engagement framework, the study identifies four key experiential factors—presence, embodiment, enjoyment, and novelty—that influence engagement and reuse intention in immersive learning. A multi-phase mixed-method design was employed. Phase I developed and tested a theoretical model using structural equation modelling with primary students aged 11 (Pratom6). Phase II involved designing a Desktop AR learning application, followed by expert validation of …

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Evaluation Of Leptospirosis Vaccine Efficacy After Modifications Of N-Linked Glycosylation In Liga Mrna Vaccines., Rampapat Phaetthayanan Jan 2025

Evaluation Of Leptospirosis Vaccine Efficacy After Modifications Of N-Linked Glycosylation In Liga Mrna Vaccines., Rampapat Phaetthayanan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Leptospirosis, caused by pathogenic Leptospira species, is a widespread zoonotic disease, particularly prevalent in developing countries in tropical areas. Commercially available bacterins have several limitations. A previous study developed a messenger RNA (mRNA) vaccine encoding the carboxy-terminal domain 7-13 of LigA (LigAc) that was expressed with glycosylation in mammalian cells and elicited high humoral immune response in a hamster model but failed to provide protection against lethal challenge. To improve the protective efficacy, this study aimed to develop LigAc-mRNA vaccines with minimal glycosylation. Three mRNA constructs were developed based on two strategies: modifying the potential N-glycosylation sites (from asparagine to …

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Analysis Of Chinese Tourists Behavior Patterns Toward Sustainable Tourism In Bangkok, Sixiang Hou Jan 2025

Analysis Of Chinese Tourists Behavior Patterns Toward Sustainable Tourism In Bangkok, Sixiang Hou

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study examined different types of Chinese tourists and their actions toward sustainable tourism development in Bangkok and provided targeted recommendation to stakeholders based on the characteristics of Tourists. The results of 405 questionnaire respondents and 6 keys stakeholders’ interviewees in tourism industry were analyzed. The study employed exploratory factor analysis and cluster analysis to uncover five behavioural dimensions and divided into three tourists’ clusters which likely travel to Bangkok, Thailand. The research identified that environmental responsibilities as one of the main differentiators to define different clusters. The research categorized behavior patterns of Chinese tourist in Bangkok, Thailand as three …

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Comparative Study Of Environmental Impacts Of End-Of-Life Management Approaches For Air Conditioners Using Lca., Viveha Sriskandaraja Jan 2025

Comparative Study Of Environmental Impacts Of End-Of-Life Management Approaches For Air Conditioners Using Lca., Viveha Sriskandaraja

Chulalongkorn University Theses and Dissertations (Chula ETD)

The amount of e-waste generated worldwide has surpassed 62 million tons, which has created consequences related to the management and disposal of e-waste. The primary concern regarding air-conditioners is waste management, as these units consist of plastics, metals, hazardous materials, and refrigerants. Improper disposal or leakage of refrigerants poses a significant greenhouse gas threat that accelerates climate change. The end-of-life (EOL) stage is often overlooked in the management of discarded air-conditioners. Therefore, this study focuses on filling the knowledge gap regarding the comparison of EOL management methods and analysing the effectiveness of regulated management methods. This study aims to use …

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Global Englishers Language Teaching Perceptions And Practices Of Vietnamese Preservice English Teachers, Vu Hoai Nhan Dang Jan 2025

Global Englishers Language Teaching Perceptions And Practices Of Vietnamese Preservice English Teachers, Vu Hoai Nhan Dang

Chulalongkorn University Theses and Dissertations (Chula ETD)

This mixed-methods study explores how Vietnamese preservice English teachers perceive and practice Global Englishes Language Teaching (GELT). In Phase 1, 100 third- and fourth-year preservice teachers completed a 24-item perceptions questionnaire, and six of them participated in in-depth interviews. Mean questionnaire responses were at the “Agree” level (M = 3.52 on a 5-point scale), indicating broad acceptance of GELT while still revealing gaps in training and materials, especially in using English varieties, integrating intercultural communication, and implementing GELT-oriented activities. Building on these findings, Phase 2 invited 30 volunteers from the original cohort to complete pre- and post-intervention questionnaires, while six …

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การจัดการเรียนรู้การอ่านตามกลยุทธ์การอ่านเชิงสนทนาเพื่อส่งเสริมสมรรถนะการอ่าน และความเพลิดเพลินในการอ่านของนักเรียนมัธยมศึกษาตอนต้น, จักรณรงค์ อินพหล Jan 2025

การจัดการเรียนรู้การอ่านตามกลยุทธ์การอ่านเชิงสนทนาเพื่อส่งเสริมสมรรถนะการอ่าน และความเพลิดเพลินในการอ่านของนักเรียนมัธยมศึกษาตอนต้น, จักรณรงค์ อินพหล

Chulalongkorn University Theses and Dissertations (Chula ETD)

การวิจัยนี้มีวัตถุประสงค์เพื่อ 1) พัฒนาขั้นตอนการจัดการเรียนรู้การอ่านตามกลยุทธ์การอ่านเชิงสนทนาเพื่อส่งเสริมสมรรถนะการอ่านและความเพลิดเพลินในการอ่านของนักเรียนมัธยมศึกษาตอนต้น และ 2) ศึกษาผลการจัดการเรียนรู้การอ่านตามกลยุทธ์การอ่านเชิงสนทนาที่มีต่อสมรรถนะการอ่าน และความเพลิดเพลินในการอ่านของนักเรียนมัธยมศึกษาตอนต้น ตัวอย่างวิจัยได้แก่ นักเรียนชั้นมัธยมศึกษาปีที่ 2 โรงเรียนขยายโอกาสทางการศึกษาแห่งหนึ่งในจังหวัดกำแพงเพชร จำนวน 16 คน ใช้เวลาในการทดลอง 8 สัปดาห์ สัปดาห์ละ 2 คาบ คาบละ 1 ชั่วโมง รวม 16 ชั่วโมง เครื่องมือที่ใช้ในการเก็บรวบรวมข้อมูลประกอบด้วย 1) แบบวัดสมรรถนะการอ่าน 2) แบบวัดความเพลิดเพลินในการอ่านโดยการประเมินตนเอง และ 3) แบบวัดความเพลิดเพลินในการอ่านโดยการสัมภาษณ์ เครื่องมือที่ใช้ในการวิจัยได้แก่ แผนการจัดการเรียนรู้ตามกลยุทธ์ การอ่านเชิงสนทนา วิเคราะห์ข้อมูลเชิงปริมาณด้วย ค่าเฉลี่ยเลขคณิต (Mean) ส่วนเบี่ยงเบนมาตรฐาน (SD) และคะแนนพัฒนาการสัมพัทธ์ (Relative Gain Score) และวิเคราะห์ข้อมูลเชิงคุณภาพด้วยการวิเคราะห์เนื้อหา ผลการวิจัยพบว่า 1) ขั้นตอนการจัดการเรียนรู้การอ่านตามกลยุทธ์การอ่านเชิงสนทนาพัฒนาขั้น ประกอบด้วย 3 ขั้น ได้แก่ (1) ขั้นกำหนดวัตถุประสงค์และเตรียมตัวอ่าน (2) ขั้นตอบสนองต่อบทอ่าน และ (3) ขั้นประเมินค่าและคิดต่อยอดจากบทอ่าน และ 2) จากการวิเคราะห์ข้อมูลเชิงปริมาณและคุณภาพพบว่า ได้ผลสอดคล้องกันคือนักเรียนที่ได้รับการจัดการเรียนรู้การอ่านตามกลยุทธ์การอ่านเชิงสนทนา มีพัฒนาการสมรรถนะการอ่านและความเพลิดเพลินในการอ่านตั้งแต่ระดับต้นขึ้นไปทุกคน

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การศึกษาผลกระทบของมาตรการขององค์การทางทะเลโลก ในการควบคุมการปล่อยก๊าซเรือนกระจกที่มีต่อกิจการเดินเรือระหว่างประเทศของไทย, เพ็ญศักดิ์ วิมลนิตย์ Jan 2025

การศึกษาผลกระทบของมาตรการขององค์การทางทะเลโลก ในการควบคุมการปล่อยก๊าซเรือนกระจกที่มีต่อกิจการเดินเรือระหว่างประเทศของไทย, เพ็ญศักดิ์ วิมลนิตย์

Chulalongkorn University Theses and Dissertations (Chula ETD)

การขนส่งสินค้าทางทะเลมีบทบาทสำคัญต่อเศรษฐกิจโลก โดยคิดเป็นสัดส่วนร้อยละ 80 ของการขนส่งสินค้าระหว่างประเทศ เนื่องจากมีต้นทุนต่ำและสามารถรองรับสินค้าปริมาณมาก อย่างไรก็ตาม อุตสาหกรรมนี้กำลังเผชิญความท้าทายจากมาตรการลดการปล่อยก๊าซเรือนกระจกที่องค์การทางทะเลระหว่างประเทศ (IMO) กำหนดใช้ตั้งแต่ปี 2023 เพื่อบรรลุเป้าหมายการปล่อยคาร์บอนสุทธิเป็นศูนย์ภายในปี 2050 มาตรการดังกล่าวส่งผลต่อสายการเดินเรือทั่วโลก รวมถึงประเทศไทย ทั้งในด้านต้นทุนการดำเนินงาน การลงทุนในเทคโนโลยี และการปรับเปลี่ยนเชื้อเพลิงทางเลือกที่มีราคาสูงกว่าเชื้อเพลิงฟอสซิลหลายเท่างานวิจัยนี้มีวัตถุประสงค์เพื่อ (1) ศึกษาปัจจัยที่ส่งผลกระทบต่อการดำเนินงานของสายการเดินเรือในประเทศไทยจากข้อกำหนดลดการปล่อยก๊าซเรือนกระจก (2) วิเคราะห์แนวทางการปรับตัวเพื่อให้สอดคล้องกับมาตรฐานสากล และ (3) นำเสนอแนวทางการบริหารจัดการที่เหมาะสมในช่วงการเปลี่ยนผ่าน ขอบเขตการศึกษาเน้นบริษัทเดินเรือระหว่างประเทศที่มีฐานปฏิบัติการในประเทศไทย จำนวน 5 บริษัท และบริษัทตรวจสอบมาตรฐานอีก 2 บริษัท โดยเก็บข้อมูลจากผู้บริหารและบุคลากรที่เกี่ยวข้องผลการศึกษาคาดว่าจะช่วยให้ผู้ประกอบการเดินเรือสามารถปรับกลยุทธ์เพื่อลดผลกระทบจากมาตรการใหม่ สนับสนุนการพัฒนาอย่างยั่งยืน และเป็นข้อมูลสำคัญสำหรับการกำหนดนโยบายภาครัฐที่เกี่ยวข้องกับการลดการปล่อยก๊าซเรือนกระจกในอุตสาหกรรมขนส่งทางทะเลของไทย

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Exploration Of The Mechanisms Of Benjakul’S Anti-Rheumatoid Arthritis Actions Through Network Pharmacology, Hongxiang Duan Jan 2025

Exploration Of The Mechanisms Of Benjakul’S Anti-Rheumatoid Arthritis Actions Through Network Pharmacology, Hongxiang Duan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Rheumatoid arthritis (RA) is driven by chronic inflammation and matrix degradation; traditional Thai formula Benjakul (BJK) is empirically used for inflammatory conditions, but its mechanisms are not well defined. To assess the antioxidant capacity of BJK and to elucidate potential anti-inflammatory targets and signaling pathways relevant to RA. BJK and its five constituent herbs were extracted with 99% ethanol and evaluated for TPC, TFC, FRAP, and DPPH assays. LC–MS/MS was used to profile key bioactive compounds, which were further filtered by SwissADME and subjected to target prediction using SwissTargetPrediction. Overlapping targets with RA-related genes were analyzed by GO and KEGG. …

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Association Between Knowledge, Attitude, Risk Perception, Expectancies And Cannabis Use Among International University Students In Thailand : A Cross-Sectional Study, Yueting Liu Jan 2025

Association Between Knowledge, Attitude, Risk Perception, Expectancies And Cannabis Use Among International University Students In Thailand : A Cross-Sectional Study, Yueting Liu

Chulalongkorn University Theses and Dissertations (Chula ETD)

The global increase in cannabis use, particularly among young individuals, poses a serious public health risk. Thailand decriminalized cannabis in 2022, under this situation, international students are experiencing changes in social attitudes toward cannabis use and have increasing access to sources of cannabis. There is currently lack of research on cannabis use among this group in Thailand. This study aimed to analyze the associations between knowledge, attitudes, risk perceptions, and expectancies and cannabis use among international university students in Thailand. This cross-sectional study was conducted among international university students aged 18 years and older in Thailand. Participants were collected through …

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The Determinants Of Short-Term And Long-Term Performance Of Initial Public Offering: Evidence From The Stock Exchange Of Thailand (Set) And Market For Alternative Investment (Mai), Chittakrij Peungsugk Jan 2025

The Determinants Of Short-Term And Long-Term Performance Of Initial Public Offering: Evidence From The Stock Exchange Of Thailand (Set) And Market For Alternative Investment (Mai), Chittakrij Peungsugk

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study examines the determinants of short and long-term IPO performance in the SET and mai market. Using samples of SET and mai IPOs from 2014-2021, the research investigates how underwriter reputation, institutional investor ownership, and big-4 auditor influence cumulative abnormal returns across time horizons. From information asymmetry, certification, and signaling theories, the study uses multiple linear regression with OLS to analyze IPO performance. Results are different between the two markets. In SET, underwriter reputation shows no certification effect across all time horizons for all reputation measures. Institutional investor ownership demonstrates no short-term impact but exhibits negative impacts with long-term …

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Disaggregating Foreign Investor Influence: Direct Holdings, Nvdrs, And Stock Price Crash Risk In The Thai Equity Market, Ploypailin Rattanaphongchirakun Jan 2025

Disaggregating Foreign Investor Influence: Direct Holdings, Nvdrs, And Stock Price Crash Risk In The Thai Equity Market, Ploypailin Rattanaphongchirakun

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis investigates the relationship between foreign ownership and stock price crash risk in the Stock Exchange of Thailand during the period 2005 to 2024. It focuses on differentiating between direct foreign investors who hold voting shares and Non-Voting Depository Receipts (NVDRs), which provide economic benefits similar to regular shares but do not confer voting rights at shareholder meetings. Additionally, this study examines whether information asymmetry and stock liquidity moderate the relationship between foreign ownership and stock price crash risk. The analysis utilizes panel data from the top 100 companies by market capitalization listed on the Stock Exchange of Thailand. …

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The Effect Of Trading Volume From Different Investor Types On Trading Friction Anomaly Returns In Thailand: Evidence From Market Microstructure Data Of The Stock Exchange Of Thailand, Suparkit Assavanig Jan 2025

The Effect Of Trading Volume From Different Investor Types On Trading Friction Anomaly Returns In Thailand: Evidence From Market Microstructure Data Of The Stock Exchange Of Thailand, Suparkit Assavanig

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study introduces a novel approach to understanding how trading volumes from individual, institutional, and foreign investors influence anomaly returns in Thailand's stock market. I integrate comprehensive analysis of seven trading friction anomalies with unique market microstructure data from the Stock Exchange of Thailand's database. This approach enables construction of long-short portfolio strategies, while accounting for the distinct trading behaviors of different investor groups during the period from 2011 to 2021.Remarkably, I discovered asymmetric effects where retail trading amplifies certain anomalies while reducing others, contradicting traditional noise trader theories. Furthermore, the integration of investor-type volume indicators with long-short anomaly strategies …

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Efficacy Of 0.3% Cannabidiol (Cbd) Oral Paste For Treatment Of Recurrent Aphthous Ulcers, Fuengboon Talkijkul Jan 2025

Efficacy Of 0.3% Cannabidiol (Cbd) Oral Paste For Treatment Of Recurrent Aphthous Ulcers, Fuengboon Talkijkul

Chulalongkorn University Theses and Dissertations (Chula ETD)

0.1% Cannabidiol (CBD) was reported to be suitable as an alternative management for Recurrent Aphthous Ulcers (RAU) due to its analgesics and anti-inflammatory effects. This study aimed to examine 0.3 % CBD when compared to 0.1% CBD, 0.1% Triamcinolone Acetonide (TA) oral paste and pure oral paste in the treatment of RAU. For safety investigations, 100 healthy subjects were examined for allergic reaction to 0.3% CBD oral paste compared to pure oral paste, then 50 healthy subjects were evaluated for local and systemic effects of 0.3% CBD oral paste in which blood tests were performed before drug application and seven …

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Stress And Burnout Level Among Bhutanese Dentists And Medical Officers In Bhutan, Karma Zangmo Jan 2025

Stress And Burnout Level Among Bhutanese Dentists And Medical Officers In Bhutan, Karma Zangmo

Chulalongkorn University Theses and Dissertations (Chula ETD)

Healthcare professionals, particularly dentists and physicians, are at high risk of stress and burnout due to long working hours, heavy workloads, clinical decision-making responsibilities, and the need for continuous knowledge updates. This study aimed to assess stress and burnout levels among Bhutanese dentists and physicians. A cross-sectional survey was conducted using online questionnaires distributed to 85 dentists and 325 physicians, with response rates of 87.7% and 52.6%, respectively. Stress was measured using the 14-item Perceived Stress Scale (PSS), and burnout was assessed with the 22-item Maslach Burnout Inventory (MBI). Among dentists, 97.8% reported stress, with 91.8% at moderate levels. Among …

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Influence Of Shade On Color Reproducibility Of Lithium Disilicate Crowns, Naphat Santiworanart Jan 2025

Influence Of Shade On Color Reproducibility Of Lithium Disilicate Crowns, Naphat Santiworanart

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: This study aimed to evaluate the influence of nominal shade on the color reproducibility of CAD-CAM lithium disilicate glass ceramic crowns.Materials and Methods: An in vitro study was conducted on 16 CAD-CAM lithium disilicate crowns (IPS e.max CAD LT) fabricated in four VITA Classical shades (A3, B3, C3, D3; N=4 per group). Each crown was cemented on a corresponding polymethylmethacrylate (PMMA) abutment of matching shade. Shade determination was performed using a spectrophotometer and an intraoral scanner under controlled conditions. Color trueness was assessed against the VITA Classical shade guide using exact match and broad acceptance criteria. The L*, a*, …

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Occlusal Analysis Using A Novel Classification Of Static And Dynamic Articulations In Tmd And Non-Tmd Patients, Uthai Uma Jan 2025

Occlusal Analysis Using A Novel Classification Of Static And Dynamic Articulations In Tmd And Non-Tmd Patients, Uthai Uma

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Temporomandibular disorders (TMD) are multifactorial conditions affecting masticatory systems. While occlusal morphology has been suggested as a contributing factor, functional, behavioral, and postural elements may play a more prominent role. This study aimed to evaluate demographic, clinical, occlusal, and functional characteristics associated with TMD in a Thai patient population using a novel articulation classification. Methods: A retrospective analysis of 872 participants (684 TMD, 188 non-TMD) was conducted. Data included demographic characteristics, postural and habitual behaviors, occlusal morphology, articulation classification, articulation ratios, mandibular range of motion, and TMD diagnostic categories. The articulation classification and ratios were designed and tested for …

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Wage Gap And Wage Discrimination Among Persons With Disabilities: Empirical Evidence From Thailand, Natthavit Wongsrithanasarn Jan 2025

Wage Gap And Wage Discrimination Among Persons With Disabilities: Empirical Evidence From Thailand, Natthavit Wongsrithanasarn

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study provides a comprehensive quantitative analysis of the disability wage gap and potential wage discrimination in Thailand. Utilizing data from the 2017 and 2022 Thailand Disability Surveys, this research employs the Oaxaca-Blinder decomposition technique to examine wage disparities between workers with and without physical or cognitive disabilities. The results reveal a substantial wage gap, with non-disabled workers, on average, earning approximately 50% more than persons with physical disabilities and more than twice as much as persons with cognitive disabilities. The decomposition analysis indicates that while over 75% of the wage gap for persons with physical disabilities is explained by …

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Automated Infinite Combos Detection System For Collectible Card Game, Amornpong Trakarnkulphun Jan 2025

Automated Infinite Combos Detection System For Collectible Card Game, Amornpong Trakarnkulphun

Chulalongkorn University Theses and Dissertations (Chula ETD)

In Collectible Card Games, resources management is one of the most effective strategy. However, there are some combinations of cards which produce unlimited resources called infinite combos. Too-cheap infinite combos that can be played early in the game break game environment, because the player who executes the combo immediately wins. To solve the problem, game designers usually restrict a part of the combos from being played. Due to the large number of cards in the card pool, it is difficult to search for these combos and solve this problem before a release date of a card set. This research aims …

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Pipeline For Non-Self-Intersecting Racetrack Generation In Racing Games, Chatrtime Chatramornrat Jan 2025

Pipeline For Non-Self-Intersecting Racetrack Generation In Racing Games, Chatrtime Chatramornrat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Procedural content generation (PCG) allows racing games to supply new racetracks automatically, but straightforward generators can produce layouts with unrealistically tight bends or self-crossings that compromise playability. This thesis introduces a racetrack generation pipeline that connects chain–code–based synthesis with a dedicated post-processing stage for resolving intersections. Candidate layouts are first assembled from image–based differential chain codes and adjusted so that each forms a closed loop. Regions where the centreline crosses itself are then identified and repaired by cutting and joining overlapping branches and applying locally constrained smoothing, so that the overall course geometry is kept intact. Finally, geometric descriptors such …

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Gitcofl : Design And Implementation Of A Git-Based Federated Learning Framework Utilizing Container-Based Technology, Chokchai Faroongsarng Jan 2025

Gitcofl : Design And Implementation Of A Git-Based Federated Learning Framework Utilizing Container-Based Technology, Chokchai Faroongsarng

Chulalongkorn University Theses and Dissertations (Chula ETD)

The rapid proliferation of artificial intelligence (AI) necessitates training paradigms that are both robust and privacy-preserving. Traditional centralized federated learning (CFL) suffers from single points of failure and communication bottlenecks, while decentralized federated learning (DFL) introduces communication complexities and lacks integrated version control. This paper proposes GitCoFL, a novel framework that leverages Docker containers and a Git server as an independent, external medium for model weight communication and storage. This architecture provides inherent flexibility, enabling efficient operation in both CFL and DFL settings. Using CIFAR-10 benchmarks with MobileNet and using FedAvg for federation algorithms, GitCoFL achieves competitive F1 score when …

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A Benchmarking Study Of Grover's Algorithm For Solving Boolean Sat With Quantum Circuits, Jirapas Unison Jipipob Jan 2025

A Benchmarking Study Of Grover's Algorithm For Solving Boolean Sat With Quantum Circuits, Jirapas Unison Jipipob

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study explores how well Grover's Algorithm performs in solving the Boolean Satisfiability Problem (SAT) using quantum circuits. The algorithm is implemented with IBM's Qiskit framework and compared to classical brute-force methods. Experiments focus on 3-SAT, 4-SAT, and 5-SAT problems, using quantum simulators and IBM quantum hardware. The results show that Grover's Algorithm is more efficient, offering a theoretical quadratic speedup over classical methods. However, practical issues like limited qubit availability, hardware noise, and optimization challenges impact its current performance. The data highlights the potential for quantum computing to scale and solve NP-complete problems. This research shows how quantum computing …

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