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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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Strategies For Playing Unshackle Games On Some Graphs, Thitiphut Leelathanakit Jan 2025

Strategies For Playing Unshackle Games On Some Graphs, Thitiphut Leelathanakit

Chulalongkorn University Theses and Dissertations (Chula ETD)

Unshackle game is a combinatorial game for two players that starts with prisoners and shackles on a board such that each shackle has two ends, and each end is shackled to one prisoner. Two players alternately play a turn by destroying a shackle on the board until all shackles have been destroyed. A prisoner is free when all shackles that are shackled to him are destroyed, and the player who makes the most prisoners free wins and the other loses. Both players draw if neither of them can win. The prisoners and the shackles on the board can be considered …

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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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Functional Characterization Of Vago In Black Tiger Shrimp Penaeus Monodon Ikk-Nf-Κb Signaling Pathway Against Viral Infection, Zittipong Nanakorn Jan 2025

Functional Characterization Of Vago In Black Tiger Shrimp Penaeus Monodon Ikk-Nf-Κb Signaling Pathway Against Viral Infection, Zittipong Nanakorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Cytokines serve as key regulators in innate antiviral defense. In crustaceans, research on cytokine-mediated immunity remains limited. A previous study in Penaeus monodon has demonstrated that PmVago proteins exhibit cytokine-like function by acting through the inhibitor of kappa B kinase-nuclear factor κB (IKK-NF-κB) cascade to defend against white spot syndrome virus (WSSV). In this study, five PmVago isoforms were identified, each showing differential transcriptional responses to pathogen challenges. Among them, PmVago1 and PmVago4 exhibited strong antiviral responses against WSSV infection. RNA interference of PmVago1 and PmVago4 increased shrimp susceptibility to WSSV infection with enhanced viral replication. Their suppression also disrupted …

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Effects Of Beetroot Gummy Jelly Ingestion On Running Performance In Simulated Hypoxia In Recreational Runners, Jun Ma Jan 2025

Effects Of Beetroot Gummy Jelly Ingestion On Running Performance In Simulated Hypoxia In Recreational Runners, Jun Ma

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study examined the effects of seven days of beetroot gummy jelly (BGJ) supplementation on physiological, metabolic, and endurance performance responses under sea-level and simulated hypoxic conditions. Eleven male recreational runners (age 22.3 ± 1.8 years; BMI 21.4 ± 2.0; VO2 max 54.2 ± 4.6 mL·kg-¹·min-¹) completed four randomized, double-blind, placebo-controlled trials: BGJ–sea level, BGJ–hypoxia, placebo–sea level, and placebo–hypoxia. Participants consumed BGJ or placebo daily for seven days before each trial. Physiological measurements included serum nitrate/nitrite, blood glucose, lactate, heart rate (HR), arterial oxygen saturation (SpO2), perceived exertion (RPE), muscle oxygenation (ΔTSI), and a 10-km time-trial performance test.BGJ supplementation significantly …

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Immunoinformatics-Based Design And In Vitro Expression Analysis Of A Multi-Epitope Vaccine Against African Swine Fever Virus, Dhithya Venkateswaran Jan 2025

Immunoinformatics-Based Design And In Vitro Expression Analysis Of A Multi-Epitope Vaccine Against African Swine Fever Virus, Dhithya Venkateswaran

Chulalongkorn University Theses and Dissertations (Chula ETD)

African swine fever (ASF) is a lethal haemorrhagic disease affecting domestic and wild pigs, causing severe economic losses globally. The absence of an effective vaccine has hindered ASF control, as traditional approaches are challenged by the virus’s genetic complexity and immune evasion mechanisms. In this study, we employed immunoinformatics to design a multi-epitope vaccine (MEV) against African Swine Fever Virus (ASFV), targeting conserved viral proteins—B646L (p72), CP204L (p30), E183L (p54), and EP402R (CD2v). Antigenic and non-allergenic BL and HL epitopes were selected and assembled with appropriate adjuvant and linkers to construct the MEV. No CTL epitopes were included, as they …

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Canine Uterine Fibrosis Associated With Age And Pyometra, Maulida Selma Hanim Jan 2025

Canine Uterine Fibrosis Associated With Age And Pyometra, Maulida Selma Hanim

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study investigated whether aging and uterine pathology drive fibrosis in the canine uterus by quantifying collagen deposition in endometrial and myometrial compartments. Uterine samples from 55 small-sized, intact, nulliparous bitches were classified into five groups according to age and pathological conditions. Healthy group divided into juvenile, young adult, old adult, and the pathological group included cystic endometrial hyperplasia (CEH), and pyometra. Fibrosis was assessed using Masson’s trichrome staining; collagen proportion was quantified with ImageJ and analysed in SAS. Across healthy age groups, collagen proportions in the endometrial stroma, circular myometrium, and longitudinal myometrium did not differ significantly (P > 0.05). …

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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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Diagnostic Approaches And Therapeutic Evaluation In Canine Benign Prostatic Hyperplasia: An Integrated Analysis Of Prostatic Volume, Serum Canine Prostatic Specific Esterase (Cpse) Levels, And Proteomic Profiles, Panthipa Borikappakul Jan 2025

Diagnostic Approaches And Therapeutic Evaluation In Canine Benign Prostatic Hyperplasia: An Integrated Analysis Of Prostatic Volume, Serum Canine Prostatic Specific Esterase (Cpse) Levels, And Proteomic Profiles, Panthipa Borikappakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Benign prostatic hyperplasia (BPH) is a highly prevalent condition in intact male dogs. However, its diagnosis and clinical management remain limited by the lack of clear thresholds for clinically significant prostatic enlargement, insufficient biomarkers to monitor treatment response, and an incomplete understanding of the molecular mechanisms driving disease progression. To address these gaps, this thesis integrated ultrasonographic, biochemical, and proteomic approaches across three complementary studies. First, the actual to expected normal prostatic volume ratio was evaluated to establish a clinically meaningful cutoff distinguishing subclinical from clinical BPH, providing an imaging-based indicator for early recognition of clinically relevant enlargement. Building on …

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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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Optimization Of Artificial Insemination In Swine Through Gnrh Agonist Application In Boar Semen With Special Emphasis On Epithelial Penetration And Pharmacokinetics, Preechaphon Taechamaeteekul Jan 2025

Optimization Of Artificial Insemination In Swine Through Gnrh Agonist Application In Boar Semen With Special Emphasis On Epithelial Penetration And Pharmacokinetics, Preechaphon Taechamaeteekul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Induction of ovulation in pigs is a widely applied technique in commercial swine farms, using hormonal treatments to improve reproductive efficiency and productivity. The GnRH agonist buserelin acetate is widely used to induce ovulation and can be administered via intramuscular or intravaginal routes. However, the success of ovulation induction via the intravaginal route still depends on several factors, and information regarding the pharmacokinetics and tissue permeation of buserelin remains limited. This thesis aimed to investigate the pharmacokinetic profile, endometrial permeability, and reproductive effects of buserelin to develop an effective and practical ovulation control strategy for commercial swine production. This thesis …

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Surveillance And Genetic Characterization Of Atypical Porcine Pestivirus (Appv) In Central Thailand, Sana Shahid Jan 2025

Surveillance And Genetic Characterization Of Atypical Porcine Pestivirus (Appv) In Central Thailand, Sana Shahid

Chulalongkorn University Theses and Dissertations (Chula ETD)

Atypical Porcine Pestivirus (APPV) is an emerging swine pathogen associated with congenital tremor (CT) Type A-II, a neurological condition characterized by tremors of the head, body, and limbs, as well as poor growth in piglets. From September 2023 to August 2025, nasal and blood samples were collected from 181 pigs from four commercial pig farms in Central Thailand, and APPV was detected in 17 samples. Notably, all APPV-positive samples come from one farm. A follow-up study was conducted at the infected farm to assess APPV persistence and its association with age groups and clinical signs. In total, 275 pigs were …

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Genomic Characterization Of Streptococcus Agalactiae And Streptococcus Suis Isolated From Diseased Snakeskin Gourami (Trichopodus Pectoralis), Surawit Chueahiran Jan 2025

Genomic Characterization Of Streptococcus Agalactiae And Streptococcus Suis Isolated From Diseased Snakeskin Gourami (Trichopodus Pectoralis), Surawit Chueahiran

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study investigates severe, recurrent mortality outbreaks in farmed snakeskin gourami (Trichopodus pectoralis) in central Thailand between 2021 and 2023. Characterized by exophthalmos and systemic hemorrhage, these incidents prompted an investigation to identify causative agents, assess antimicrobial resistance (AMR), and explore genomic adaptation. Bacterial isolates from moribund fish in Samut Sakhon province were identified via MALDI-TOF MS and 16S rRNA sequencing, followed by whole-genome sequencing (Illumina HiSeq) and comparative pan-genomic analysis. Two primary pathogens, Streptococcus agalactiae and Streptococcus suis, were confirmed as causative agents of acute bacterial septicemia, occurring in both single and co-infections. Phylogenetic analysis revealed that S. suis …

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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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Challenges Of Korean Novel Translation : The Case Study Of Love In The Big City, Ana Catarina Lopes Jan 2025

Challenges Of Korean Novel Translation : The Case Study Of Love In The Big City, Ana Catarina Lopes

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study investigates the challenges of translating Korean literary fiction for international audiences, with a focus on Park Sang Young’s Love in the Big City and Anton Hur’s English translation of the novel. While K-pop and K-dramas have become global cultural phenomena, Korean novels have not achieved the same level of recognition, often due to the complexities of cultural translation. This research examines how translation choices shape the way English readers experience Korean fiction, focusing on how culture, society, and emotion are mediated across languages. It also compares this with the accessibility of screen adaptations, understood here as the relative …

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Investigation On The Tribological Properties Of Al2o3-Tic Substrates In Fixed Abrasive Lapping For Data Storage Application, Benjie Fernandez Jan 2025

Investigation On The Tribological Properties Of Al2o3-Tic Substrates In Fixed Abrasive Lapping For Data Storage Application, Benjie Fernandez

Chulalongkorn University Theses and Dissertations (Chula ETD)

Alumina titanium-carbide (Al2O3-TiC) or simply AlTiC substrates were widely used in the magnetic recording industry for their superior mechanical and tribological properties. This study investigated the effect of AlTiC substrate properties in slider lapping tribology. Two types of AlTiC substrates, Type-A AlTiC and Type-B AlTiC equipped with an electro lapping guide (ELG), fully functional reader and writer devices were used in the study. Type-A AlTiC was found to have higher hardness and lower coefficient of friction resulting to lower lapping material removal rate and smoother surface finish. The difference in mechanical properties were attributed to the crystal structure and chemical …

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Social Integration In International Marriages Between Russian Women And Korean Men In Urban South Korea, Evgeniia Shakirova Jan 2025

Social Integration In International Marriages Between Russian Women And Korean Men In Urban South Korea, Evgeniia Shakirova

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis explores the everyday social integration experiences of Russian women married to Korean men and living in urban South Korea. Drawing on the theoretical frameworks of Everyday Multiculturalism and Multicultural Space Making, the study investigates how cultural differences are negotiated in daily life through practices such as language use, food preparation, parenting, household routines and everyday social interactions. Using a qualitative research design, a number of in-depth interviews and supplementary observations were conducted with interlocutors residing in Seoul, Suwon, and Incheon. Thematic analysis revealed how these women actively shape their domestic, neighbourhood and digital environments to maintain cultural continuity …

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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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A Comparative Case Study Of Face-To-Face Vs Virtual Fortune Telling In Bangkok In The Aftermath Of Covid-19 : Relevance And Adaptation, Jade Evalyn Di Donato Jan 2025

A Comparative Case Study Of Face-To-Face Vs Virtual Fortune Telling In Bangkok In The Aftermath Of Covid-19 : Relevance And Adaptation, Jade Evalyn Di Donato

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study explores the adaptation of Thai fortune telling practices, specifically astrology and tarot card reading, in response to increasing digitization and the impact of the Covid-19 pandemic. While the practice has been traditionally rooted in face-to-face interactions, it has transformed in recent years with the growing prevalence of online consultations. Utilizing Catherine Bell's theory of ritualization alongside the Transfer of Ritual theory, this research analyzes how the ritual meaning and symbolism of Thai fortune telling are preserved across digital and physical spaces, especially in a post-pandemic world. Relying on a comparative case study of two female fortune tellers—one who …

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Inclusive-Classroom Simulation Using Immersive Vr Technology : A Training Tool For Classroom Management With Asd Students, Jakkarin Thepvong Jan 2025

Inclusive-Classroom Simulation Using Immersive Vr Technology : A Training Tool For Classroom Management With Asd Students, Jakkarin Thepvong

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study developed and evaluated the Inclusive Classroom Simulation (ICS), an immersive virtual reality (IVR) tool designed to improve pre-service teachers’ self-efficacy and attitudes toward managing inclusive classrooms with students on the autism spectrum. Using mixed-methods approach, including expert interviews, prototype development, usability testing, and a pre-post VR intervention, the study engaged pre-service teachers in realistic classroom scenarios that replicated ASD-related disruptive behaviors. Findings indicate that high sense of agency enchances classroom-management, self-efficacy and attitudes toward inclusive practices. Qualitative results further support the tool’s authenticity, usability, and potential for skill transfer to real-world teaching. The research expands VR-based teacher training …

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Comparative Study Of Chinese And Korean Webcomic Industries From The Perspective Of Platformization And Copyright Governance : Lessons From The Success Of Korean Webtoons, Jiayi Wang Jan 2025

Comparative Study Of Chinese And Korean Webcomic Industries From The Perspective Of Platformization And Copyright Governance : Lessons From The Success Of Korean Webtoons, Jiayi Wang

Chulalongkorn University Theses and Dissertations (Chula ETD)

Research Objectives: This study aims to comparatively analyze the divergent development paths of the Chinese and Korean webtoon industries, focusing on the synergistic mechanisms of platformization and copyright governance. It seeks to diagnose the root causes of China's "localization failure" and propose a viable ecosystem reconstruction pathway. Methodology: Employing a qualitative comparative case study approach, this research examines primary platforms (Naver, Kakao, Kuaikan, Tencent) through the lens of an integrated theoretical framework combining platformization, media political economy, and copyright governance. Data is triangulated from industry reports, financial disclosures, and academic literature. Findings: The research finds that Korea's success is built …

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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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Identity, Norms And Recognition : A Constructivist Account Of Singapore–Taiwan Relations Under Strategic Constraint, Mohamad Faisal Bin Jamain Jan 2025

Identity, Norms And Recognition : A Constructivist Account Of Singapore–Taiwan Relations Under Strategic Constraint, Mohamad Faisal Bin Jamain

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis examines the enduring resilience of the Singapore–Taiwan relationship, which persists despite intensifying geopolitical constraints, rising diplomatic risks and modest material incentives. This persistence presents a realist paradox: while traditional materialist accounts establish the structural constraints (such as the “One China” policy and great-power rivalry) that rationally predict disengagement, they fail to systematically account for the specific mechanisms and ideational strategies that underpin the relationship's resilience. Addressing this critical theoretical gap, this study applies a constructivist framework centred on identity, norms and recognition, situating these ideational insights alongside material and geopolitical constraints to offer a holistic explanation. The primary …

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Factors Affecting Sustainable Supply Chain Practices And Sustainability Performance, Kittinun Makprang Jan 2025

Factors Affecting Sustainable Supply Chain Practices And Sustainability Performance, Kittinun Makprang

Chulalongkorn University Theses and Dissertations (Chula ETD)

Sustainable supply chain practices are increasingly emphasized as organizations seek to balance economic, social, and environmental responsibilities. Yet, empirical findings remain inconsistent, particularly in emerging economies where organizational readiness varies. This study examines (1) the influence of market orientation, dynamic capabilities, and managerial commitment on sustainable supply chain practices, and (2) whether these practices contribute to economic, social, and environmental performance. Data were collected from 159 managers across multiple industries in Thailand. Partial Least Squares Structural Equation Modeling (PLS-SEM), supported by multi-group and interaction-effect analyses, was used to evaluate structural relationships and sectoral differences. The results show that market orientation …

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Chilean Perceptions Of Thailand As Seen Through Social Media (2015 – 2024), Nicolas Agustin Castillo Aldunce Jan 2025

Chilean Perceptions Of Thailand As Seen Through Social Media (2015 – 2024), Nicolas Agustin Castillo Aldunce

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis has two main objectives: 1) to examine the perception of Thailand as seen in Chilean social media between 2015 and 2024 and 2) to identify the prevailing narratives and stereotypes and underline the factors responsible for these perceptions. 120 social media posts about Thailand from 11 institutional and independent Chilean content creators are collected and analyzed and Richard Gregory’s theory of perception is applied as its theoretical framework. It is found that there was an increase in online contents related to Thailand since 2015 after the ratification of Chile-Thailand Free Trade Agreement, particularly between 2022 to 2024 when …

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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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Investigation Of Lipid Binding Regions In Phospholipase (Ves A 1) From Vespa Venom By Computational Study, Nawanwat Chainuwong Pattaranggoon Jan 2025

Investigation Of Lipid Binding Regions In Phospholipase (Ves A 1) From Vespa Venom By Computational Study, Nawanwat Chainuwong Pattaranggoon

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study investigated the structural behavior, membrane adhesion mechanism, and inhibition mechanism of Ves a 1, the primary phospholipase A1 enzyme from the venom of the Thai banded tiger wasp (\textit{Vespa affinis}). The main objective was to discover an inhibitor for Ves a 1 from this species. From a database of 2,056 FDA-approved drugs, voxilaprevir was found to bind well to the main catalytic site of Ves a 1, exhibiting a binding free energy (Delta GBindSIE) of approximately -11 to -10 kcal/mol, whereas DMPC, used as a positive control, had a binding energy of approximately -9 to -7 kcal/mol. Analysis …

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Synthesis Of Fes2 And Fes2-Mns2 Composite Nanostructured Photocatalysts For Dye Degradation, Septian Budiman Jan 2025

Synthesis Of Fes2 And Fes2-Mns2 Composite Nanostructured Photocatalysts For Dye Degradation, Septian Budiman

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research addresses the environmental challenge of synthetic dye pollution by developing and evaluating novel photocatalysts. Iron pyrite (FeS2), an abundant and low-cost semiconductor, is a promising candidate for photocatalysis, but its practical application is severely limited by its high instability and susceptibility to photocorrosion under light irradiation. To overcome this limitation, this study investigates the synthesis of bare FeS2 nanoparticles and their modification with MnS2. FeS2 nanoparticles were first synthesized via a hydrothermal method at 180°C, using FeSO4·7H2O and Na2S2O3·5H2O precursors. Subsequently, a FeS2-MnS2 material was synthesized using a facile reflux method, with optimal conditions identified as 3 hours …

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Imagining Peace From Abroad : How Myanmar Students In Bangkok Define Peace, Shinhyoung Choi Jan 2025

Imagining Peace From Abroad : How Myanmar Students In Bangkok Define Peace, Shinhyoung Choi

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis examines how Myanmar students living in Bangkok understand and define peace through their everyday experiences, social positions, and transnational lives. Drawing on a multi-stage, qualitatively driven research design—including a narrative survey, a structured follow-up survey, and in-depth interviews—the study investigates how students’ peace perceptions emerge while they navigate between Myanmar’s instability and Bangkok’s relative institutional order.Findings from 105 participants show that students’ peace orientations cluster into two dominant narratives: a Development-Oriented Narrative emphasizing education, opportunity, and gradual change, and a Resistance-Oriented Narrative emphasizing justice, accountability, and structural reform. Although the initial hypothesis assumed that Bangkok’s stability would directly …

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