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2024

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การจัดเก็บภาษีมูลค่าเพิ่ม (Vat) สำหรับของที่มีราคาไม่เกิน 1,500 บาท ของสำนักงานศุลกากร ตรวจสินค้าท่าอากาศยานสุวรรณภูมิ, ธราดล กมุทา Jan 2024

การจัดเก็บภาษีมูลค่าเพิ่ม (Vat) สำหรับของที่มีราคาไม่เกิน 1,500 บาท ของสำนักงานศุลกากร ตรวจสินค้าท่าอากาศยานสุวรรณภูมิ, ธราดล กมุทา

Chulalongkorn University Theses and Dissertations (Chula ETD)

การศึกษาการจัดเก็บภาษีมูลค่าเพิ่ม (VAT) สำหรับของที่มีราคาไม่เกิน 1,500 บาท ของสำนักงานศุลกากรตรวจสินค้าท่าอากาศยานสุวรรณภูมิ มีวัตถุประสงค์ 2 ประการ คือ เพื่อศึกษาปัญหาและอุปสรรคในการปฏิบัติงานการจัดเก็บภาษีมูลค่าเพิ่ม (VAT) สำหรับของที่มีราคาไม่เกิน 1,500 บาท และเพื่อเสนอแนวทางในการพัฒนาการปฏิบัติงานการจัดเก็บภาษีมูลค่าเพิ่ม (VAT) สำหรับของที่มีราคาไม่เกิน 1,500 บาท การศึกษาวิจัยในครั้งนี้ เป็นการวิจัยเชิงคุณภาพ โดยใช้วิธีการศึกษาข้อมูลจากเอกสาร และการสัมภาษณ์เชิงลึก โดยมีผู้ให้ข้อมูลสำคัญ จำนวน 10 ท่าน คือ ผู้บังคับบัญชา เจ้าหน้าที่ผู้ปฏิบัติงาน และภาคส่วนที่เกี่ยวข้องกับการจัดเก็บภาษีมูลค่าเพิ่ม ผลการศึกษาพบว่า ปัญหาและอุปสรรคในการปฏิบัติงานการจัดเก็บภาษีมูลค่าเพิ่ม คือ ระบบสารสนเทศของกรมศุลกากร ไม่ว่าจะเป็นระบบการออกใบเสร็จรับเงินของกรมศุลกากร (กศก. 122) ที่ยังมิสามารถออกใบเสร็จแยกรายผู้นำเข้าได้ ระบบผ่านพิธีการศุลกากรอิเล็กทรอนิกส์สำหรับของเร่งด่วน (e-Express) ซึ่งหน่วงและขาดเสถียรภาพ ประกอบกับการประชาสัมพันธ์ของกรมศุลกากรที่ยังบกพร่องและไม่ครอบคลุม ผู้นำเข้าและประชาชนจำนวนมากไม่ทราบถึงการมีอยู่ของมาตรการการจัดเก็บภาษีมูลค่าเพิ่ม สำหรับของที่มีมูลค่าไม่เกิน 1,500 บาท โดยผู้ให้สัมภาษณ์ส่วนใหญ่เห็นว่าในการพัฒนาการปฏิบัติงาน การจัดเก็บภาษีมูลค่าเพิ่ม ควรให้ความสำคัญกับการพัฒนา แก้ไข และปรับปรุงระบบสารสนเทศของ กรมศุลกากร ให้มีความทันสมัย รวดเร็ว และมีเสถียรภาพ ซึ่งเป็นพื้นฐานสำคัญที่จะทำให้การปฏิบัติงาน การจัดเก็บภาษีมูลค่าเพิ่มเป็นไปอย่างมีประสิทธิภาพ คุ้มค่า อำนวยความสะดวกในการดำเนินพิธีการศุลกากรต่อผู้ประกอบการและประชาชน


แรงจูงใจที่ส่งผลต่อประสิทธิภาพในการทำงานของเจ้าพนักงานปกครอง กรณีศึกษาสำนักอำนวยการกองอาสารักษาดินแดน กรมการปกครอง, นิติศักดิ์ ปานปรุง Jan 2024

แรงจูงใจที่ส่งผลต่อประสิทธิภาพในการทำงานของเจ้าพนักงานปกครอง กรณีศึกษาสำนักอำนวยการกองอาสารักษาดินแดน กรมการปกครอง, นิติศักดิ์ ปานปรุง

Chulalongkorn University Theses and Dissertations (Chula ETD)

การวิจัยนี้มีวัตถุประสงค์เพื่อศึกษาศึกษาความคิดเห็นของเจ้าพนักงานปกครองเกี่ยวกับปัจจัยจูงใจในการทำงานและแรงจูงใจในการบริการสาธารณะที่มีผลต่อประสิทธิภาพในการปฏิบัติงาน กรณีศึกษา สำนักอำนวยการกองอาสารักษาดินแดน กรมการปกครอง และแรงจูงใจที่ส่งผลประสิทธิภาพในการทำงานของเจ้าพนักงานปกครอง ตลอดจนเสนอแนวทางในการปรับปรุงและพัฒนาปัจจัยต่าง ๆ ที่จะสร้างแรงจูงใจที่ ช่วยส่งเสริมประสิทธิภาพในการทำงานให้กับเจ้าพนักงานปกครอง สำนักอำนวยการกองอาสารักษาดินแดน กรมการปกครอง ผลการศึกษาพบว่า แรงจูงใจที่ส่งผลต่อประสิทธิภาพในการทำงานของเจ้าพนักงานปกครองในสำนักอำนวยการกองอาสารักษาดินแดนอย่างมีนัยสำคัญ แบ่งเป็น ปัจจัยจูงใจในการทำงาน ได้แก่ ความสัมพันธ์ระหว่างเพื่อนร่วมงานและผู้ใต้บังคับบัญชา ลักษณะงาน และความรับผิดชอบ ส่วนแรงจูงใจในการบริการสาธารณะ ได้แก่ ความมุ่งมั่นในการรับผิดชอบต่อผลประโยชน์สาธารณะ ความเห็นอกเห็นใจ และความเสียสละ ทั้งนี้ มีข้อเสนอแนะควรให้หน่วยงานมีแนวทางในการปรับเปลี่ยนแนวคิดและวิธีการทำงานของผู้บังคับบัญชาให้มีความยืดหยุ่นเพิ่มมากขึ้น เปิดโอกาสการรับฟังความคิดเห็นของผู้ปฏิบัติงาน มีการแลกเปลี่ยนความคิดเห็น และสร้างการสื่อสารที่มีความชัดเจน ทั้งนี้ จะเป็นการสร้างแรงจูงใจให้กับเจ้าพนักงานปกครอง และส่งผลไปสู่ประสิทธิภาพในการทำงาน


ผลการจัดการเรียนรู้สุขศึกษาโดยใช้แนวคิดกรอบคิดติดยึดเติบโตที่มีต่อพฤติกรรมทางเพศที่พึงประสงค์และการเคารพของนักเรียนมัธยมศึกษาตอนปลาย, สุวิจักขณ์ พลเดช Jan 2024

ผลการจัดการเรียนรู้สุขศึกษาโดยใช้แนวคิดกรอบคิดติดยึดเติบโตที่มีต่อพฤติกรรมทางเพศที่พึงประสงค์และการเคารพของนักเรียนมัธยมศึกษาตอนปลาย, สุวิจักขณ์ พลเดช

Chulalongkorn University Theses and Dissertations (Chula ETD)

การวิจัยครั้งนี้มีวัตถุประสงค์ เพื่อศึกษาผลการจัดการเรียนรู้สุขศึกษาโดยใช้แนวคิดกรอบคิดติดยึดเติบโตที่มีต่อพฤติกรรมทางเพศที่พึงประสงค์และการเคารพของนักเรียนมัธยมศึกษาตอนปลาย วิธีดำเนินการวิจัย ตัวอย่างใช้การเลือกกลุ่มตัวอย่างแบบเฉพาะเจาะจง เป็นนักเรียนโรงเรียนในสังกัดสำนักงานเขตพื้นที่การศึกษามัธยมศึกษากรุงเทพมหานคร ชั้นมัธยมศึกษาปีที่ 5 จำนวน 60 คน และใช้วิธีการสุ่มอย่างง่ายจับฉลากแบ่งเป็นกลุ่มทดลองที่ได้รับการจัดการเรียนรู้โดยใช้การเรียนรู้แนวคิดกรอบคิดติดยึดเติบโต จำนวน 30 คน และกลุ่มควบคุมที่ได้รับการจัดการเรียนรู้โดยใช้รูปแบบปกติจำนวน 30 คน เครื่องมือที่ใช้ในการวิจัย คือ แผนการจัดการเรียนรู้สุขศึกษาโดยใช้การจัดการเรียนรู้โดยใช้แนวคิดกรอบคิดติดยึดเติบโต จำนวน 8 แผน มีค่าดัชนีความสอดคล้องรวม 0.87 และเครื่องมือที่ใช้ในการเก็บรวบรวมข้อมูล คือ แบบวัดพฤติกรรมทางเพศที่พึงประสงค์และการเคารพ จำนวน 2 ฉบับ มีค่าดัชนีความสอดคล้อง 0.94 และ 1 ตามลำดับ มีค่าความเที่ยง 0.86 และ 0.79 ตามลำดับ วิเคราะห์ข้อมูลโดยใช้ค่าเฉลี่ย ส่วนเบี่ยงเบนมาตรฐาน และทดสอบความแตกต่างค่าเฉลี่ยของคะแนนด้วยค่าที ซึ่งการจัดการเรียนรู้สุขศึกษาโดยใช้แนวคิดกรอบคิดติดยึดเติบโตสามารถนำไปปรับประยุกต์ใช้ในการพัฒนาผู้เรียนได้


Editorial: Sars-Cov-2: Implications For Maternal-Fetal-Infant And Perinatal Mortality, Morbidity, Pregnancy Outcomes And Well-Being, Cheryl K Walker, Balaji Govindaswami Jan 2024

Editorial: Sars-Cov-2: Implications For Maternal-Fetal-Infant And Perinatal Mortality, Morbidity, Pregnancy Outcomes And Well-Being, Cheryl K Walker, Balaji Govindaswami

Faculty, Staff and Students Publications

No abstract provided.


Tract-Based Analyses Of White Matter In Schizophrenia, Bipolar Disorder, Aging, And Dementia Using High Spatial And Directional Resolution Diffusion Imaging: A Pilot Study, Daniel Mamah, Shingshiun Chen, Joshua S Shimony, Michael P Harms Jan 2024

Tract-Based Analyses Of White Matter In Schizophrenia, Bipolar Disorder, Aging, And Dementia Using High Spatial And Directional Resolution Diffusion Imaging: A Pilot Study, Daniel Mamah, Shingshiun Chen, Joshua S Shimony, Michael P Harms

2020-Current year OA Pubs

INTRODUCTION: Structural brain connectivity abnormalities have been associated with several psychiatric disorders. Schizophrenia (SCZ) is a chronic disabling disorder associated with accelerated aging and increased risk of dementia, though brain findings in the disorder have rarely been directly compared to those that occur with aging.

METHODS: We used an automated approach to reconstruct key white matter tracts and assessed tract integrity in five participant groups. We acquired one-hour-long high-directional diffusion MRI data from young control (CON, n =28), bipolar disorder (BPD, n =21), and SCZ (n =22) participants aged 18-30, and healthy elderly (ELD, n =15) and dementia (DEM, n …


Cross-Temporal Hierarchical Forecast Reconciliation Of Natural Gas Demand, Colin O. Quinn, George F. Corliss, Richard J. Povinelli Jan 2024

Cross-Temporal Hierarchical Forecast Reconciliation Of Natural Gas Demand, Colin O. Quinn, George F. Corliss, Richard J. Povinelli

Electrical and Computer Engineering Faculty Research and Publications

Local natural gas distribution companies (LDCs) require accurate demand forecasts across various time periods, geographic regions, and customer class hierarchies. Achieving coherent forecasts across these hierarchies is challenging but crucial for optimal decision making, resource allocation, and operational efficiency. This work introduces a method that structures the gas distribution system into cross-temporal hierarchies to produce accurate and coherent forecasts. We apply our method to a case study involving three operational regions, forecasting at different geographical levels and analyzing both hourly and daily frequencies. Trained on five years of data and tested on one year, our model achieves a 10% reduction …


Protocol For A Pilot Clinical Trial Of The Senolytic Drug Combination Dasatinib Plus Quercetin To Mitigate Age-Related Health And Cognitive Decline In Mental Disorders [Version 2; Peer Review: 1 Approved, 2 Approved With Reservations], Abigail Schweiger, Breno Diniz, Ginger Nicol, Julie Schweiger, Andes E Dasklakis-Perez, Eric J Lenze Jan 2024

Protocol For A Pilot Clinical Trial Of The Senolytic Drug Combination Dasatinib Plus Quercetin To Mitigate Age-Related Health And Cognitive Decline In Mental Disorders [Version 2; Peer Review: 1 Approved, 2 Approved With Reservations], Abigail Schweiger, Breno Diniz, Ginger Nicol, Julie Schweiger, Andes E Dasklakis-Perez, Eric J Lenze

2020-Current year OA Pubs

BACKGROUND: Major depressive disorder (MDD) and schizophrenia are linked to accelerated aging leading to reduced lifespan, health span and cognitive decline. Cellular senescence, in which cells lose proliferative capacity and develop a senescence-associated secretory phenotype (SASP), plays a role in this process. Emerging research suggests that the senolytic regimen of dasatinib+quercetin (D+Q) reduces senescent cells, potentially mitigating age-related health and cognitive decline. This pilot study aims to assess the feasibility and safety of D+Q in older adults with schizophrenia, schizoaffective disorder, and treatment-resistant depression (TRD).

METHODS: This single-center study will recruit 30 participants total aged 50 years or older with …


Navigating The Complexity Of Applying Nutrition Evidence To Individualised Care: Summary Of An Academy Of Nutrition Sciences Position Paper, Judith Buttriss, Mary Hickson, Kevin Whelan, Christine Williams Jan 2024

Navigating The Complexity Of Applying Nutrition Evidence To Individualised Care: Summary Of An Academy Of Nutrition Sciences Position Paper, Judith Buttriss, Mary Hickson, Kevin Whelan, Christine Williams

School of Health Professions

Diet is key to the maintenance of health and crucial in the prevention and management of many diseases. Modified nutrient intake may become essential to prevent deficiency, optimise development and health or manage symptoms and disease progression. Adding to the complexity, disease and its treatment can also affect taste, appetite and ability to access and prepare foods. Coupled with this, individual requirements for energy, macronutrients and micronutrients are influenced by factors such as life stage (age, growth, pregnancy, etc.) and health status, which can affect the processes of consuming, digesting, absorbing, metabolising or excreting nutrients. First and foremost, dietary advice …


Examining Associations Between Genetic And Neural Risk For Externalizing Behaviors In Adolescence And Early Adulthood, Sarah J Brislin, Andrey P Anokhin, Et Al. Jan 2024

Examining Associations Between Genetic And Neural Risk For Externalizing Behaviors In Adolescence And Early Adulthood, Sarah J Brislin, Andrey P Anokhin, Et Al.

2020-Current year OA Pubs

BACKGROUND: Researchers have identified genetic and neural risk factors for externalizing behaviors. However, it has not yet been determined if genetic liability is conferred in part through associations with more proximal neurophysiological risk markers.

METHODS: Participants from the Collaborative Study on the Genetics of Alcoholism, a large, family-based study of alcohol use disorders were genotyped and polygenic scores for externalizing (EXT PGS) were calculated. Associations with target P3 amplitude from a visual oddball task (P3) and broad endorsement of externalizing behaviors (indexed via self-report of alcohol and cannabis use, and antisocial behavior) were assessed in participants of European (EA;

RESULTS: …


Just Don’T Do It: Why Cannabis Regulations Are The Reason Cannabis Businesses Are Failing, Edward Adams Jan 2024

Just Don’T Do It: Why Cannabis Regulations Are The Reason Cannabis Businesses Are Failing, Edward Adams

Articles

Part I will provide a historical overview of the cannabis plant and our country’s experience with it prior to the election of President Richard Nixon. It is at that point, the early 1970s, that the current federal cannabis scheme began to take shape. Sections I.A though I.C will discuss the inception of the War on Drugs during the Nixon Administration and examine the subsequent social movement that led President Reagan to revamp and expand the War on Drugs throughout the 1980s.

The legal framework for federal cannabis regulation has largely remained stagnant since the Reagan Administration. Nevertheless, the federal stance …


Xuebijing Improves Intestinal Microcirculation Dysfunction In Septic Rats By Regulating The Vegf-A/Pi3k/Akt Signaling Pathway, A-Ling Tang, Yan Li, Li-Chao Sun, Xiao-Yu Liu, Nan Gao, Sheng-Tao Yan, Guo-Qiang Zhang Jan 2024

Xuebijing Improves Intestinal Microcirculation Dysfunction In Septic Rats By Regulating The Vegf-A/Pi3k/Akt Signaling Pathway, A-Ling Tang, Yan Li, Li-Chao Sun, Xiao-Yu Liu, Nan Gao, Sheng-Tao Yan, Guo-Qiang Zhang

Faculty, Staff and Student Publications

BACKGROUND: This study aims to explore whether Xuebijing (XBJ) can improve intestinal microcirculation dysfunction in sepsis and its mechanism.

METHODS: A rat model of sepsis was established by cecal ligation and puncture (CLP). A total of 30 male SD rats were divided into four groups: sham group, CLP group, XBJ + axitinib group, and XBJ group. XBJ was intraperitoneally injected 2 h before CLP. Hemodynamic data (blood pressure and heart rate) were recorded. The intestinal microcirculation data of the rats were analyzed via microcirculation imaging. Enzyme-linked immunosorbent assay (ELISA) kits were used to detect the serum levels of interleukin-6 (IL-6), …


Statins Are Rarely Prescribed For Incidentally Discovered Covert Cerebrovascular Disease: A Retrospective Cohort In A Large Electronic Health Record (Ehr) Identified Using Natural Language Processing, Lester Y Leung, Eric Puttock, David F Kallmes, Patrick Luetmer, Sunyang Fu, Chengyi X Zheng, Hongfang Liu, Wansu Chen, David M Kent Jan 2024

Statins Are Rarely Prescribed For Incidentally Discovered Covert Cerebrovascular Disease: A Retrospective Cohort In A Large Electronic Health Record (Ehr) Identified Using Natural Language Processing, Lester Y Leung, Eric Puttock, David F Kallmes, Patrick Luetmer, Sunyang Fu, Chengyi X Zheng, Hongfang Liu, Wansu Chen, David M Kent

Faculty, Staff and Student Publications

Introduction: While incidentally discovered covert cerebrovascular diseases (id-CCD) are associated with future stroke, it is not known if patients with id-CCD are prescribed statins.

Methods: Patients age ≥50 with id-CCD on neuroimaging from 2009 to 2019 with no prior ischaemic stroke, transient ischaemic attack or dementia were identified using natural language processing in a large real-world cohort. Robust Poisson multivariable regression was used to assess statin prescription among patients without prior statins.

Results: Among 2 41 050 patients, 74 975 patients (31.1%; 4.7% with covert brain infarcts (CBI); 29.0% with white matter disease (WMD)) had id-CCD. 53.5% (95% CI 53.2 …


The Enact Network Is Acting On Housing Instability And The Unhoused Using The Open Health Natural Language Processing Toolkit, Daniel R Harris, Sunyang Fu, Andrew Wen, Alexandria Corbeau, Darren Henderson, Jordan Hilsman, David Oniani, Yanshan Wang Jan 2024

The Enact Network Is Acting On Housing Instability And The Unhoused Using The Open Health Natural Language Processing Toolkit, Daniel R Harris, Sunyang Fu, Andrew Wen, Alexandria Corbeau, Darren Henderson, Jordan Hilsman, David Oniani, Yanshan Wang

Faculty, Staff and Student Publications

Housing is an environmental social determinant of health that is linked to mortality and clinical outcomes. We developed a lexicon of housing-related concepts and rule-based natural language processing methods for identifying these housing-related concepts within clinical text. We piloted our methods on several test cohorts: a synthetic cohort generated by ChatGPT for initial infrastructure testing, a cohort with substance use disorders (SUD), and a cohort diagnosed with problems related to housing and economic circumstances (HEC). Our methods successfully identified housing concepts in our ChatGPT notes (recall = 1.0, precision = 1.0), our SUD population (recall = 0.9798, precision = 0.9898), …


Three Essays On Digital Health: Online Communication, Health Information Seeking, Complementary Medicine Use Among Older Adults And Vulnerable Populations, Daria Turavinina Jan 2024

Three Essays On Digital Health: Online Communication, Health Information Seeking, Complementary Medicine Use Among Older Adults And Vulnerable Populations, Daria Turavinina

Chulalongkorn University Theses and Dissertations (Chula ETD)

Through three empirical essays, this work explored how information and communication technology (ICT) use shapes population health behaviors and outcomes, with a particular focus on older adults. The first essay critically investigated whether online communication can serve as a substitute for in-person social contact in mitigating loneliness among late middle-aged and older persons. The study finds that while excessive reliance on digital interaction correlated with higher loneliness in the general older adult population, it could potentially serve a protective function for those in poor health by reducing social isolation. The second essay investigated how online health information seeking behavior and …


‘Hoa Gio’: The Development Of A Modern Vietnamese Architectural Element Beyond The Ventilation Block, Kat Huynhson Jan 2024

‘Hoa Gio’: The Development Of A Modern Vietnamese Architectural Element Beyond The Ventilation Block, Kat Huynhson

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research examines the development of 'Hoa gió,' a traditional Vietnamese architectural element, from the precolonial era, through colonial adaptations, to its reinterpretation in modernism. 'Hoa gió' offers sun shading, ventilation, privacy, and aesthetic value, fitting well with Vietnam’s climate, and was a key feature of the “golden era” of Vietnamese modernism. Although there is scholarly interest, studies on 'Hoa gió' are limited and often view it as a Western adaptation. This study examines how 'Hoa gió' was adapted and reinterpreted as a "traditional-turned-modern" component, interacting with external currents. Using a qualitative approach, this research analyzes 'Hoa gió' across historical …


Investigation Of Information-Seeking Behavior Of Secondary School English Teachers In Batam City, Indonesia For Lesson Plan Preparation, Rayhan Musa Novian Jan 2024

Investigation Of Information-Seeking Behavior Of Secondary School English Teachers In Batam City, Indonesia For Lesson Plan Preparation, Rayhan Musa Novian

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis examines the information sources chosen by secondary school English teachers for lesson planning, alongside their information awareness and the constraints encountered. A lesson plan acts as a teacher's guide, detailing student learning objectives, associated resources and activities, and ensuring compliance with local and national curricula. This qualitative research employed semi-structured interviews with 15 English teachers from secondary schools in Batam City, Indonesia, using the Zoom platform. Thematic analysis was applied to analyze the data. Results reveal a three-stage pattern in teachers' selection and use of information sources: primary, secondary, and tertiary stages. Initially, teachers rely on formal internal …


The Influence Of Intellectual Property Mergers And Acquisitions On Long- Term Financial Performance: Insights From Chinese Companies, Mingyue Fang Jan 2024

The Influence Of Intellectual Property Mergers And Acquisitions On Long- Term Financial Performance: Insights From Chinese Companies, Mingyue Fang

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study examines the long-term financial effects of intellectual property-related M&As (IP M&As) in China, using ROIC as the main performance metric. Based on a panel of listed firms from 2000–2020, it first applies a DID model to compare IP M&As with regular deals, then extends to a DDD framework to assess directional heterogeneity (North-to-South, South-to-North, intra-regional). Results show IP M&As improve ROIC, especially in North-to-South transactions. Mechanism analysis confirms enhanced innovation output, though its financial conversion may face institutional or integration frictions. The study highlights the strategic value of IP M&As and the importance of regional context in post-deal …


Effect Of Chairside Silicone Polishing Systems On The Surface Roughness Of Cad/Cam Milled And Conventional Denture Base Materials, Sarita Apiromwijit Jan 2024

Effect Of Chairside Silicone Polishing Systems On The Surface Roughness Of Cad/Cam Milled And Conventional Denture Base Materials, Sarita Apiromwijit

Chulalongkorn University Theses and Dissertations (Chula ETD)

Purpose: The objective of this study was to evaluate the effect of two commercial chairside polishing systems compared with conventional laboratory polishing on the surface roughness of two types of denture base materials. Methods: Square-shaped specimens (8x8x5 mm) were fabricated from CAD/CAM milled and heat-polymerized denture base materials. Each specimen was ground with tungsten carbide and then divided into three groups according to polishing techniques(n=8): Exa technique, AcryPoint, and conventional laboratory polishing. The roughness (Ra) values were measured using a non-contact profilometer after finishing with tungsten carbide bur, every 30 seconds with each subsequent polisher (rough, medium, and fine) of …


The Study On Surface Roughness And Corrosion Resistance Of Electropolished Laser Powder Bed Fusion Ti-6al-4v Eli Alloy, Venus Chatpaiboonwat Jan 2024

The Study On Surface Roughness And Corrosion Resistance Of Electropolished Laser Powder Bed Fusion Ti-6al-4v Eli Alloy, Venus Chatpaiboonwat

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Ti6Al4V ELI alloy produced via Laser Powder Bed Fusion (L-PBF) has drawn interest for usage in dental applications. However, surface finishing is an important property that can be managed by various methods. The purpose of this study was to investigate the effects of electropolishing (EP) on the surface roughness and corrosion resistance of L-PBF Ti6Al4V ELI alloy. The present study explored the influence of current density, voltage, and distance on the surface quality and corrosion behavior. The results showed that EP significantly reduced the surface roughness and enhanced corrosion resistance of printed Ti6Al4V ELI alloy with the best result …


Studying The Relationship Between Polyherbal Mouthwash And Oral Microbiome, Waris Wattanawongwan Jan 2024

Studying The Relationship Between Polyherbal Mouthwash And Oral Microbiome, Waris Wattanawongwan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: This study aimed to comparatively evaluate the effects of polyherbal, chlorhexidine (CHX), and normal saline (NCC) mouthwashes on oral microbiome composition, microbial metabolic pathways, and patient-reported outcomes, exploring polyherbal alternatives in response to CHX-associated dysbiosis. Methods: A randomized, double-blind trial was conducted among 27 gingivitis patients, randomly assigned to polyherbal, CHX, or NCC mouthwash groups. Participants used the mouthwash twice daily for 7 days. Saliva samples were analyzed via 16S rRNA sequencing. Microbial diversity (alpha and beta diversity) and composition were statistically evaluated. Differential taxa and pathways were identified using FDR-corrected Wilcoxon tests and log₂ fold-change analysis. Patient-reported outcomes …


Antenatal Dexamethasone For Late Preterm Deliveries: A Randomized Controlled Trial, Hoang Minh Chau Le Jan 2024

Antenatal Dexamethasone For Late Preterm Deliveries: A Randomized Controlled Trial, Hoang Minh Chau Le

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Antenatal corticosteroids (ACS) have been found to have beneficial effects on neonatal lung function, reducing mortality and morbidities, especially in very preterm infants. The World Health Organization recommends ACS for women at risk of preterm birth from 24 to 34 weeks of gestation; however, specific recommendations ACS use in late preterm deliveries remain lacking. This study aimed to assess the effect of antenatal dexamethasone on reducing the need for respiratory support, neonatal morbidities and mortality, NICU admission, and length of hospital stay in late preterm infants. Methods: This single-centre, parallel group, open-label randomized controlled trial enrolled women with singleton …


Evaluating The Severity Of Disc Herniation : A Comparative Analysis Of Standing Spine Radiographs And Mri Findings, Suttinont Surapuchong Jan 2024

Evaluating The Severity Of Disc Herniation : A Comparative Analysis Of Standing Spine Radiographs And Mri Findings, Suttinont Surapuchong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: The degree of spinal canal compromise in lumbar disc herniation (LDH) significantly influences treatment outcomes. Although magnetic resonance imaging (MRI) remains the gold standard for assessing LDH severity, limited access in primary and secondary care settings can delay diagnosis and referral. This study aimed to determine whether radiological parameters observed on standing spine radiographs can predict the severity of LDH and support timely referral for advanced care. Methods: In this retrospective cross-sectional study, patients diagnosed with LDH who underwent both standing whole-spine radiographs and lumbar MRI between June 2014 and January 2024 were included. Radiographic parameters evaluated included disc …


The Effect Of Artogomezianone On Apoptosis Induction In Non-Small-Cell Lung Cancer, Worawich Somboonvoravong Jan 2024

The Effect Of Artogomezianone On Apoptosis Induction In Non-Small-Cell Lung Cancer, Worawich Somboonvoravong

Chulalongkorn University Theses and Dissertations (Chula ETD)

NSCLC severity is driven by dysregulation of the EGFR/PI3K/Akt pathway, promoting tumor growth and drug resistance. Hyperactive EGFR/PI3K/Akt signaling results in aggressive tumors and poor outcomes, further worsened by resistance to EGFR inhibitors. Targeting this pathway could inhibit tumor growth and resistance. artogomezianone, a compound derived from Artocarpus gomezianus, has shown considerable anti-cancer efficacy, mainly by inducing apoptosis and decreasing the proliferation of several cancers. This study investigated artogomezianone’s effects on the EGFR/PI3K/Akt pathway. Cytotoxic and apoptotic effects were assessed using MTT assay and Hoechst 33342/PI double staining, with confirmation by Western blot analysis. Protein levels and binding affinity were …


Development Of Biosensors For Detection Of Human Papillomavirus Type 16 Dna, Panon Tungkunaruk Jan 2024

Development Of Biosensors For Detection Of Human Papillomavirus Type 16 Dna, Panon Tungkunaruk

Chulalongkorn University Theses and Dissertations (Chula ETD)

This dissertation aims to develop two unconventional methods for the detection of a high-risk, cancer-causing human papillomavirus type 16 (HPV16) on miniaturized platforms for point-of-care testing (POCT). The first part focuses on a direct detection of HPV16 double-stranded DNA (dsDNA) using the non-self-pairing pyrrolidinyl peptide nucleic acid (acpcPNA) pair on a paper-based substrate coupled with fluorescence and electrochemical dual detections using a DNA-binding dye in a single device. The acpcPNA pair can perform double duplex invasion into dsDNA by hybridizing with each strand of DNA in the same region without the requirement of denaturing dsDNA to single-stranded DNA (ssDNA) before …


Pride And Prejudice Program Jan 2024

Pride And Prejudice Program

Theatre and Performance Studies Programs

Department of Theatre and Performance Studies

Pride and Prejudice

Adapted by Kate Hamill

Based on the novel by Jane Austen

Directed by Marlon Burnley


Saudi Arabia's Nuclear Decision-Making In The Era Of Mohammad Bin Salman, Andrew Brown Jan 2024

Saudi Arabia's Nuclear Decision-Making In The Era Of Mohammad Bin Salman, Andrew Brown

Graduate Theses/Dissertations

Strategic culture plays a crucial role in shaping countries’ decision-making in regard to security and foreign policy. In the context of nuclear proliferation, strategic culture can significantly impact a country’s willingness to pursue nuclear weapons and how it calculates the risks and benefits of such a decision. This thesis examines Saudi Arabia’s decision-making under the leadership of Crown Prince Mohammed bin Salman (MBS), who has brought about significant changes in the country's strategic culture through aggressive top-down reform. While much of Saudi Arabia's traditional strategic culture has remained intact under MBS and his father, King Salman, some elements have shifted …


Nobody's Perfect: Examining The Relationship Between Parenting Traits And Perfectionism And The Impact Of Maladaptive Versus Adaptive Perfectionism On Cortisol Regulation After Receiving Criticism, Olivia G. Baron Jan 2024

Nobody's Perfect: Examining The Relationship Between Parenting Traits And Perfectionism And The Impact Of Maladaptive Versus Adaptive Perfectionism On Cortisol Regulation After Receiving Criticism, Olivia G. Baron

Graduate Theses/Dissertations

The trait of perfectionism has been related to both internalizing and externalizing psychopathology. Parenting traits, and attachment tendencies affect how children develop relationships and impact them into their adult lives. Parents have a large impact on their child’s personality traits, coping styles, and modeling reactions to outward criticism. Criticism, especially criticism delivered by parents, has been linked to perfectionism. Perfectionism often involves a self-critical component, though perfectionists have not been studied to examine stress responses (e.g. cortisol change) when receiving criticism. This study examined the relationships between parenting traits (positive and negative) and perfectionism (adaptive and maladaptive). Cortisol change scores …


Perfectly Disconnected: Examining The Role Of Neuroticism In The Perfectionism Social Disconnection Model, Brooklynn Madison Cook Jan 2024

Perfectly Disconnected: Examining The Role Of Neuroticism In The Perfectionism Social Disconnection Model, Brooklynn Madison Cook

Graduate Theses/Dissertations

Numerous studies have examined the effects of various personality traits on social functioning. Perfectionism is a multidimensional personality trait that has been related to lower social connection and perceived social support. The Perfectionism Social Disconnection Model (PSDM) suggests that perfectionism traits lead to interpersonal disconnection as those with perfectionism are inclined to intensely fear rejection due to the innate need to be accepted by others. Conflictingly, this leads to a distant presentation in social relationships, impeding interpersonal connection. While researchers have employed several variables to further examine the interpersonal nature of perfectionism, neuroticism has yet to be considered in the …


Sharing Is Caring: The Effect Of Interpersonal Interdependence, Shame Proneness, And Empathy On One's Physiological Response When Witnessing And Experiencing Shame, Lauren Michelle Smith Jan 2024

Sharing Is Caring: The Effect Of Interpersonal Interdependence, Shame Proneness, And Empathy On One's Physiological Response When Witnessing And Experiencing Shame, Lauren Michelle Smith

Graduate Theses/Dissertations

This study identifies the impact of interpersonal interdependence on one’s physiological response when one witnesses shame and examines the predictive qualities of shame-proneness and empathy on these differences. It is predicted that interpersonal interdependence, shame proneness, and empathy will affect the physiological response. A One-way Repeated Measures ANOVA, single linear regression, and multiple linear regression were used to assess differences. The findings showed that participants experienced significantly higher levels of physiological arousal when experiencing shame personally compared to witnessing it in others (stranger and loved one). It was also found that shame-proneness has a negative relationship with physiological arousal when …


Recollection, Shelby Ann Theis-Lukenbill Jan 2024

Recollection, Shelby Ann Theis-Lukenbill

Graduate Theses/Dissertations

My work is inspired by life's transient nature and objects' enduring capacity to house memories. The delicate sculptures I create combine second-hand objects with paper to capture the essence of moments and possessions that define personal histories. The objects I use represent more than their form or chemistry; they are imbued with fragments of history and memory that I am driven to preserve. In this work, the sentimental nature and purpose of my belongings hold an equal or greater value than the physical nature and purpose of those belongings. I illuminate an object’s sentimentality by combining its form with painted …