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ความเต็มใจที่จะจ่ายของผู้บริโภคต่อการเลือกบริการเสริมของสายการบินราคาประหยัดในเส้นทางบินระหว่างประเทศ, ยุพาวินี ฤทธิ์ไธสง Jan 2025

ความเต็มใจที่จะจ่ายของผู้บริโภคต่อการเลือกบริการเสริมของสายการบินราคาประหยัดในเส้นทางบินระหว่างประเทศ, ยุพาวินี ฤทธิ์ไธสง

Chulalongkorn University Theses and Dissertations (Chula ETD)

เนื่องจากอุตสาหกรรมการบินมีการเติบโตอย่างต่อเนื่อง โดยเฉพาะสายการบินราคาประหยัดหรือสายการบินต้นทุนต่ำ (Low-cost carrier: LCC) ที่เข้ามามีบทบาทสำคัญในการให้บริการขนส่งทางอากาศทั้งเส้นทางบินในประเทศและระหว่างประเทศ การวิจัยนี้มีวัตถุประสงค์เพื่อวิเคราะห์ความเต็มใจที่จะจ่ายของผู้บริโภคที่มีต่อบริการเสริมของสายการบินราคาประหยัด ประกอบด้วย บริการระบบสาระบันเทิงบนเครื่องบิน บริการห้องรับรองและบริการสิ่งอำนวยความสะดวกบนเครื่องบิน โดยรวบรวมข้อมูลจากการแจกแบบสอบถามโดยตรงและแบบออนไลน์ผ่านกลุ่มต่าง ๆ ให้กับผู้โดยสารที่เคยหรือมีประสบการณ์ในการใช้บริการจำนวน 100 ราย วิเคราะห์ข้อมูลด้วยการวิเคราะห์องค์ประกอบร่วมหรือวิธีแบบจำลองทางเลือก (Conjoint Analysis: CA) การศึกษาครั้งนี้ใช้การออกแบบชุดทางเลือกเพื่อสร้างการทดลองทางเลือกด้วยวิธี Orthogonal ทางเลือกของรูปแบบการให้บริการจะนำเสนอด้วยชุดคุณลักษณะการบริการรวมถึงอัตราค่าโดยสาร ซึ่งแต่ละสถานการณ์ทางเลือกสมมติขึ้นเพื่อใช้เป็นตัวเลือกระหว่างแนวทางการให้บริการพื้นฐานและแนวทางเลือกที่มีการเพิ่มระดับการให้บริการ โดยผู้ตอบแบบสอบถามแต่ละรายจะได้รับชุดสถานการณ์ทางเลือกทั้งหมด 7 ชุดสถานการณ์ เพื่อให้ผู้ตอบแบบสอบถามเลือกแนวทางที่พึงพอใจที่สุดจากสถานการณ์นั้น ๆ ผลการวิเคราะห์พบว่า ผู้โดยสารมีความเต็มใจที่จะจ่ายค่าใช้จ่ายเพิ่มเติมต่อบริการของระบบสาระบันเทิงบนเครื่องบินเป็นมูลค่า 597 บาทต่อเที่ยวและเต็มใจที่จะจ่ายเป็นมูลค่า 735 บาทต่อเที่ยว สำหรับบริการสิ่งอำนวยความสะดวกบนเครื่องบิน ในขณะที่การศึกษาไม่พบนัยสำคัญทางสถิติในความเต็มใจจ่ายในบริการห้องรับรอง ผลการศึกษานี้สามารถนำไปใช้เป็นแนวทางในการกำหนดราคา เพื่อเพิ่มรายได้จากบริการเสริม

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Association Of Out-Of-Pocket Expenditures With Continuation And Type Of Treatment Among New Adult Cancer Cases At Ahsania Mission Cancer And General Hospital In Bangladesh (2023-2024) : A Secondary Data Analysis, A K M Shahriar Jan 2025

Association Of Out-Of-Pocket Expenditures With Continuation And Type Of Treatment Among New Adult Cancer Cases At Ahsania Mission Cancer And General Hospital In Bangladesh (2023-2024) : A Secondary Data Analysis, A K M Shahriar

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background and Objective: Bangladesh faces a heavy cancer burden, with about 167,000 new cases annually and 68% of health spending paid out-of-pocket (OOP). High OOP costs cause financial toxicity, forcing patients to abandon treatment. This study examined associations between patient OOP expenditures and prescribed treatment continuation and treatment modality (others versus chemotherapy/radiotherapy) among adult cancer patients at a hospital in Dhaka. Methodology: We conducted a cross-sectional analysis of existing hospital records for all adult cancer patients (age ≥18) at Ahsania Mission Cancer and General Hospital between 01 January 2023 and 31 December 2024 (N = 12,907). Data included each patient’s …

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Association Of Biomarker And Cardiovascular-Kidney-Metabolic Syndrome Among Older Chinese Adults : Findings From A Nationwide Study, Jiahao Shi Jan 2025

Association Of Biomarker And Cardiovascular-Kidney-Metabolic Syndrome Among Older Chinese Adults : Findings From A Nationwide Study, Jiahao Shi

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: CKM syndrome poses a growing burden in aging populations, but early detection remains limited by the lack of integrated biomarkers. The C-reactive protein–triglyceride glucose index (CTI), which reflects inflammation and insulin resistance—two core drivers of CKM—has not yet been evaluated for its association with CKM status in large, aging Asian cohorts. This study addresses this gap.Objective: To investigate the association of C-reactive protein–triglyceride–glucose (CTI) index with cardiovascular-kidney-metabolic (CKM) syndrome in older Chinese adults.Methods: This cross-sectional study analyzed data from 10,318 participants aged ≥45 years in the 2015 China Health and Retirement Longitudinal Study (CHARLS). CKM syndrome was operationalized as …

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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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"Factors Associated With Knowledge, Attitude And Practice (Kap) Towards The Prevention Of Type 2 Diabetes Mellitus Among The Middle-Aged Group Adults In Dhaka City, Bangladesh : A Cross-Sectional Study", Sabrina Rahman Jan 2025

"Factors Associated With Knowledge, Attitude And Practice (Kap) Towards The Prevention Of Type 2 Diabetes Mellitus Among The Middle-Aged Group Adults In Dhaka City, Bangladesh : A Cross-Sectional Study", Sabrina Rahman

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Type 2 Diabetes Mellitus has emerged as a critical public health challenge in Bangladesh, particularly in urban areas, like Dhaka city, due to rapid urbanization, sedentary lifestyles, dietary transitions, and increasing obesity rates. However, there is limited research related to influencing factors of knowledge, attitude, and practice towards diabetes prevention in Bangladesh. Objective: This study aims to identify the level of knowledge, attitude, and practices (KAP) towards the prevention of Type 2 Diabetes Mellitus and their associated factors among middle-aged adults in Dhaka City, Bangladesh. Methods: A cross-sectional study design was conducted in participants aged 30–64 years, with a …

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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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Nat Kunn And Nat Nann: Changes Of “Body Techniques” And Domestic Spaces Within The Spiritual Cult Of Myanmar, Aung Khant Jan 2025

Nat Kunn And Nat Nann: Changes Of “Body Techniques” And Domestic Spaces Within The Spiritual Cult Of Myanmar, Aung Khant

Chulalongkorn University Theses and Dissertations (Chula ETD)

The British colonization of Burma in 1885 marked a turning point in Myanmar’s traditional society, particularly in changes of body techniques, shikho (prostration), and the practice of wearing or removing shoes in sacred spaces. While recent scholars have examined the changes in body techniques and spiritual cult, the relationship between body techniques and domestic spaces has remained underexplored. Tracing the changes in techniques from Colonial Burma to contemporary Myanmar, this thesis explores the relationship between body techniques and domestic spaces, Nat Kunn, small shrines dedicated to specific Nats, deities, and Nat Nann, which are larger shrines for the Nat Pantheon. …

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The Insignificant: Curating “Everyday” Lights In Bangkok, Bhuvarin Thaveetermsakul Jan 2025

The Insignificant: Curating “Everyday” Lights In Bangkok, Bhuvarin Thaveetermsakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

The “insignificant” in this thesis is not meant unimportant, but a neutral state of the subject waiting to be acknowledged by the observer. This concept is based on the theories of “everyday life,” proposed by Charles Baudelaire and Maurice Blanchot. In “The Painter of Modern Life” (1863), Baudelaire redefined art as the object of everyday, while Blanchot’s “Everyday Speech” (1959) described the everyday as something difficult to grasp yet existed along the urban streets.This thesis is the exploration into everyday lights and darkness in different architectural scales and cultural contexts. The exploration is classified through scholarly texts from Electric light: …

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Potted Plants In Urban Spaces: Analyzing Social And Spatial Dynamics For Urban Management In Bangkok's Residential Areas, Chihiro Okajima Jan 2025

Potted Plants In Urban Spaces: Analyzing Social And Spatial Dynamics For Urban Management In Bangkok's Residential Areas, Chihiro Okajima

Chulalongkorn University Theses and Dissertations (Chula ETD)

Potted plants have long served as portable, small-scale gardens for residents in Thailand, particularly in densely populated and flood-prone areas. In Bangkok, they remain a common feature of the urban landscape, reflecting both everyday life and traditional Thai culture. Beyond their cultural and visual value, these potted plants are increasingly recognized as a practical form of green infrastructure, especially in high-density urban areas where space is limited. However, current rigid regulatory frameworks—which distinguish strictly between public and private spaces—prioritize keeping sidewalks clear, creating tension between city and residents as most potted plants are placed on public land beyond private property …

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Cinematic Architecture: Perceiving The Real From The Reel In How To Make Millions Before Grandma Dies Film Setting, Edbert Theo Fortino Jan 2025

Cinematic Architecture: Perceiving The Real From The Reel In How To Make Millions Before Grandma Dies Film Setting, Edbert Theo Fortino

Chulalongkorn University Theses and Dissertations (Chula ETD)

Cinematic architecture is a multidisciplinary approach that examines the relationship between film and architecture. This thesis explores how film offers a unique way to immerse audiences in spatial experience. Through time, movement, and visual framing, film can dramatize or reinterpret space according to the director’s vision, making it a valuable medium for understanding how architecture is perceived, used, and felt. Film also visualizes fragments of real everyday life, cultural practices, and spatial behaviour. Observing how characters inhabit and interact with spaces reveals how real users interpret the functional and symbolic meanings of architecture—insights often overlooked when architects rely solely on …

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Design Concepts Of Sun Shading Devices For Office Buildings, Designed By Intaren In Bangkok, Thailand, 1969-1974, Aung Kaung Myat Jan 2025

Design Concepts Of Sun Shading Devices For Office Buildings, Designed By Intaren In Bangkok, Thailand, 1969-1974, Aung Kaung Myat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Tropical modernism in Bangkok in the 1970s synthesized modern architectural principles with the demands of Thailand’s hot and humid climate. Various design approaches focusing on deterring the tropical sun were incorporated into the building design. In doing so, sun shading played a major role in climatic responsiveness in tropical environments. Within tropical modernism, numerous buildings with climate-responsive features have been designed by local and foreign architects, with Intaren Architects & Engineers being one of them. Studying the shading devices of office buildings designed by this firm between 1969 and 1974 in Bangkok, Thailand, this research explores the concept and philosophy …

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The Works Of Hassan Roland Vogel As Tropical Modern Architecture In Southeast Asia, 1960s-1980s, Li Hung Chang Jan 2025

The Works Of Hassan Roland Vogel As Tropical Modern Architecture In Southeast Asia, 1960s-1980s, Li Hung Chang

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research explores the architectural contributions of Swiss architect Hassan Roland Vogel (1932–1987), focusing on his interpretation of Tropical Modernism within the cultural and urban contexts of Southeast Asia from the 1960s to the 1980s. As a lesser-known yet significant figure in regional modernism, Vogel co-founded INTAREN Architect and Engineer Company Limited in Bangkok with Jean Albert Penneçot, producing a body of work that balanced Swiss precision with tropical adaptability. His projects, ranging from corporate towers to diplomatic buildings, demonstrate how modernist ideals were reinterpreted through climate, material, and local culture.The study examines key works such as the Esso Building …

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Analysing Biophilic And Technophilic Design In Architectural Materiality: A Comparative Study Of Bangkok's Community Malls, Thailand, Min Si Hein Jan 2025

Analysing Biophilic And Technophilic Design In Architectural Materiality: A Comparative Study Of Bangkok's Community Malls, Thailand, Min Si Hein

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study examines how architectural materiality and perceptual attributes influence human sensory and emotional experience through the theoretical frameworks of biophilia and technophilia. Focusing on two community malls in Bangkok—The Commons Thong Lo and Zone C of Marché Thong Lo—the research adopts a qualitative comparative case study approach, combining on-site observation, photographic documentation, and semi-structured interviews. The study applies an attribute-based analytical framework that categorizes architectural experience into six dimensions: material origin, sensory qualities, user interaction, visual comfort, spatial atmosphere, and emotional response. The findings reveal that The Commons Thong Lo expresses a predominantly biophilic orientation, characterized by natural materials, …

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K-Popization: A Study Of The Visuals Of Music Videos By Girl Groups In Southeast Asia, Kai Ho Ng Jan 2025

K-Popization: A Study Of The Visuals Of Music Videos By Girl Groups In Southeast Asia, Kai Ho Ng

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research examines the visual homogenization of music video (MV) production among Southeast Asian girl groups under K-pop's influence—a phenomenon termed K-popization—to elucidate its localization processes within this complex, multi-layered region. It addresses three key research questions: (1) What are the characteristics of K-popization? (2) How are K-pop visual elements localized? and (3) How can communication design practices investigate K-popization in MV production? The study analyzes MVs from K-pop and SEA-pop girl groups uploaded to YouTube (each with over 10,000 views) between January 2019 and July 2025, encompassing 76 Southeast Asian girl groups (296 MVs) and 111 Korean girl groups …

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Dérive And Drawing As Urban Research Tools To Uncover Spatial Patterns Of Street Practices In Bangkok: The Area Around Nana Bts Station As A Case Study, Miao Chen Jan 2025

Dérive And Drawing As Urban Research Tools To Uncover Spatial Patterns Of Street Practices In Bangkok: The Area Around Nana Bts Station As A Case Study, Miao Chen

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study employs the Situationist strategy of dérive and drawing as research tools to examine the everyday practices and spatial characteristics of Bangkok’s streets under conditions of governance ambiguity. Taking the area around Nana BTS station as a case study, the research identifies seven activity nodes formed through the aggregation of everyday practices. Through repeated path observations at different times of day, it traces the processes by which street users and vendors gather, negotiate, and interact, thereby revealing distinctive spatial patterns and rhythms of use. Furthermore, the study applies experimental mapping to translate these findings into visual form. This process …

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Investigating The Spatiality Of Sites Of Youth Āddā (Informal Social Hangout) In Changing Urban Landscape: A Study Of Rajshahi, Bangladesh, Md Samiul Sabbir Islam Jan 2025

Investigating The Spatiality Of Sites Of Youth Āddā (Informal Social Hangout) In Changing Urban Landscape: A Study Of Rajshahi, Bangladesh, Md Samiul Sabbir Islam

Chulalongkorn University Theses and Dissertations (Chula ETD)

Recent urban transformation in the Global South, driven by globalization, commodification, and a logic of development, is producing homogenized cities and increasingly regulated public spaces. Within this context, the Bengali practice of adda (āddā), understood as prolonged informal, convivial conversation, embodies a form of non-instrumental sociability that resists commodification and control. Although a historically and cultural rooted practice, scholarly attention to adda has been limited. The spatial dimensions of adda, the characteristics of its sites, or how changing urban conditions influence the practice, especially among youth remain under-explored. This study investigates the spatiality of youth adda in the rapidly transforming …

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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 Economic And Climate Policy Uncertainties On Momentum Strategies Across Different Esg Levels, Siwaphat Prommana Jan 2025

The Effect Of Economic And Climate Policy Uncertainties On Momentum Strategies Across Different Esg Levels, Siwaphat Prommana

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis investigates the impact of Economic Policy Uncertainty (EPU) and Climate Policy Uncertainty (CPU) on ESG momentum strategies in U.S. equity markets from 2011 to 2023. Momentum portfolios are constructed within high- and low-rated ESG pillar groups to assess how policy uncertainty influences their performance across different firm characteristics, including sectoral classification and geographic operations. Empirical analysis reveals that policy uncertainty, particularly through Forecast and News channels, significantly affects momentum returns, with the strongest effects concentrated among low ESG-rated and domestically focused firms. Cyclical sectors display heightened sensitivity to both EPU and CPU, while international firms show weaker or …

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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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A Comparative Study Of Econometric And Deep Learning Models For Forecasting Exchange-Traded Fund Prices In The Thai Market, Witchayut Likhitrattanakon Jan 2025

A Comparative Study Of Econometric And Deep Learning Models For Forecasting Exchange-Traded Fund Prices In The Thai Market, Witchayut Likhitrattanakon

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study evaluates and compares the forecasting accuracy of ten Exchange-Traded Funds (ETFs) in the Thai market using comprehensive econometric and deep learning models, with Mean Absolute Error (MAE) as the primary performance metric. The research examines DCC-GARCH, CCC-GARCH, standard GARCH-type models and Long Short-Term Memory (LSTM) networks across both raw and processed data environments (from isolation forest and random forest). In the comprehensive model comparison, Univariate LSTM with Real Price input (30 lookback period) achieved the lowest MAE for eight of ten ETFs in raw data and seven of ten in processed data, establishing it as the most effective …

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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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Effect Of Characteristics Of Titanium Dental Implant And Patient Related Factors On Implant Stability: 2-Year Retrospective Follow-Up Study, Kyaw Zin Thein Jan 2025

Effect Of Characteristics Of Titanium Dental Implant And Patient Related Factors On Implant Stability: 2-Year Retrospective Follow-Up Study, Kyaw Zin Thein

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Dental implants offer improvements in oral function and aesthetics for edentulous patients. Thai dental implants have emerged as a cost-effective alternative product. Objective: This study aimed to evaluate factors that influence the success of PRK dental implants over a two-year follow-up period. Methods: This retrospective study included patient records of at least one unit of PRK implant-supported prosthesis with a minimum of two-year of follow-up between 2020 and 2025 at the Dental Innovation Foundation under Royal Patronage, Thailand. Data was extracted on demographics, oral habits, medical history, and periodontal parameters (plaque index, pocket depth, keratinized gingiva width, and gingival …

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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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Effect Of Printing Orientation And Surface Treatment On The Surface Roughness, Shear Bond Strength, And Flexural Strength Of 3d-Printed Provisional Materials, Kornrawee Wiroonsri Jan 2025

Effect Of Printing Orientation And Surface Treatment On The Surface Roughness, Shear Bond Strength, And Flexural Strength Of 3d-Printed Provisional Materials, Kornrawee Wiroonsri

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to evaluate the influence of printing orientation and surface treatment on the surface roughness, shear bond strength (SBS), and flexural strength of three-dimensional (3D)-printed provisional resin materials. Four printing orientations (0°, 45°, 60°, and 90°) and four surface treatments (no treatment, airborne particle abrasion (APA), tetrahydrofuran (THF), and HC primer) were investigated. A total of 320 specimens were fabricated, post-processed, and tested according to ISO standards. Among these, 240 disk-shaped specimens were utilized for surface roughness assessment, conducted using a non-contact profilometer, and for SBS evaluation through a notched-edge shear test. Additionally, 80 rectangular bar specimens were …

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Physico-Mechanical And Antibacterial Properties Of Resin-Based Dental Sealants Modified With Graphene Oxide Nanoparticles, Ploypim Kraisintu Jan 2025

Physico-Mechanical And Antibacterial Properties Of Resin-Based Dental Sealants Modified With Graphene Oxide Nanoparticles, Ploypim Kraisintu

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objectives: This study evaluated the effects of incorporating graphene oxide (GO) nanoparticles at different concentrations (0.1, 0.25, and 0.5 wt%) into resin-based pit and fissure sealants. Mechanical, physical, antibacterial, and cytotoxicity were tested and compared with a commercial reference material.Materials and Methods: An experimental resin-based sealant was formulated and reinforced with GO (G2–G4), while an unmodified resin served as control (G1) and Helioseal® F Plus as commercial comparison (G5). GO morphology was characterized by TEM. Specimens (n=240) were tested for Vickers microhardness, viscosity, surface roughness (DRa) after simulated toothbrushing, and fluorescence (% blue channel). Antibacterial activity against Streptococcus mutans was …

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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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Rational Decision-Making Model: Ap Micro, Ar Macro, A-Level Economics, And Ib Economics, Nasiwat Thanathitiphuwaphat Jan 2025

Rational Decision-Making Model: Ap Micro, Ar Macro, A-Level Economics, And Ib Economics, Nasiwat Thanathitiphuwaphat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Should students take high school economics? They face choices among Advanced Placement (AP), Advanced Level (AL), and International Baccalaureate (IB) Economics programs, which are equivalent to college-level economics coursework. While students value their initial exposure to economics, whether high school economics provides optimal utility remains uncertain. We employ a rational decision-making model to guide students in choosing an appropriate economics education. We emphasize the importance of achieving high grade, as AP, AL, or IB Economics can enhance college admission prospects, improve the economics learning experience, and allow for credit transfer. Students must first identify exam availability and financial constraints before …

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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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