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Association Between Fast Oscillation Patterns And Surgical Outcomes After Temporal Lobectomy In Epileptic Patients With Hippocampal Sclerosis, Pongsakorn Kongsakorn
Association Between Fast Oscillation Patterns And Surgical Outcomes After Temporal Lobectomy In Epileptic Patients With Hippocampal Sclerosis, Pongsakorn Kongsakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Background: Temporal lobe epilepsy-hippocampal sclerosis (TLE-HS) is not uncommon and constitutes a leading cause of drug-resistant epilepsy. Some drug-resistant TLE-HS patients may fail to the surgical treatment i.e., anterior temporal lobectomy (ATL) and suffer from persistent seizures, despite being carefully evaluated prior to the surgery. This prompts further study to assess the potential more reliable biomarker for the surgical outcome. Objectives: To ascertain the specific scalp oscillation (SO) pattern, demonstrated by a 256-channel high-density EEG (HD-EEG), which is associated with the surgical outcome. Methods: A cohort of consecutive TLE-HS patients who underwent the HD-EEG study and subsequently performed a ATL …
Three Essays On Digital Health: Online Communication, Health Information Seeking, Complementary Medicine Use Among Older Adults And Vulnerable Populations, Daria Turavinina
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 …
Assessment Of Dietary Protein Intake Pattern And Perception Of Egg White Noodle Consumption Among Pre-Aging Population, Apisara Limpraphuwiwattana
Assessment Of Dietary Protein Intake Pattern And Perception Of Egg White Noodle Consumption Among Pre-Aging Population, Apisara Limpraphuwiwattana
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to examine protein consumption behaviors and the factors influencing protein intake among the pre-aging population, with a focus on egg white protein and the acceptance of egg white protein noodles. The study employed the Health Belief Model as a theoretical framework to explore health beliefs regarding protein consumption and its association with sarcopenia among pre-aging adults (45-59 years) in Bangkok, Thailand. A cross-sectional survey was conducted with 305 participants, using questionnaires to assess protein consumption patterns. In addition, sensory perception of egg white noodles was evaluated by 60 participants, and 40 participants were included to assess their …
Influence Of Postural Balance, Fear Of Falling, And Falls Risk Awareness On Quality Of Life In Hypertensive And Normotensive Old Aged Females, Rikza Naseer
Chulalongkorn University Theses and Dissertations (Chula ETD)
Background: Older adult falls are a severe concern in terms of public health worldwide, with many assessment tools predominantly in English, pointing to the need to perform cross-cultural adaptation and validation to use the different instruments in various cultures. The purpose of this study was to translate the Urdu version of the Falls Risk Awareness Questionnaire for eldercare and established its reliability and validity. Moreover, this cross-sectional study also investigated the correlation of anthropometric measurements, postural balance, fear of falls, and falls risk awareness with quality of life of hypertensive older female patients attending Hospitals of Lahore, Pakistan. Methods: Two …
‘Hoa Gio’: The Development Of A Modern Vietnamese Architectural Element Beyond The Ventilation Block, Kat Huynhson
‘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 …
Filled Pauses As A Parameter For Forensic Voice Comparison In Thai, Chanakan Wittayasakpan
Filled Pauses As A Parameter For Forensic Voice Comparison In Thai, Chanakan Wittayasakpan
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study investigated the potential of filled pauses as a parameter for forensic voice comparison in Thai by analyzing within-speaker and between-speaker acoustic variation. Spontaneous speech from 20 female Bangkok Thai speakers was examined, focusing on the filled pauses ‘uh’ [(ʔ)ɤ̀ː] and ‘em’ [(ʔ)ɤ̀ːm]. Acoustic features extracted included the first three formant frequencies (F1, F2, F3), dynamic formant trajectories, and durations. The analysis consistently showed that Thai filled pauses carry significant speaker-specific information, demonstrated by several measures showing significant between-speaker variation that outweighed within-speaker variation and their ability to discriminate speakers above chance levels. The systems were found to be …
Investigation Of Information-Seeking Behavior Of Secondary School English Teachers In Batam City, Indonesia For Lesson Plan Preparation, Rayhan Musa Novian
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 …
A Comparative Study Of Early Fusion And Multimodal Siamese Neural Network Using Image And Text Data In Food Classification, Kanokporn Sintarasirikulchai
A Comparative Study Of Early Fusion And Multimodal Siamese Neural Network Using Image And Text Data In Food Classification, Kanokporn Sintarasirikulchai
Chulalongkorn University Theses and Dissertations (Chula ETD)
The economic development under capitalism has significantly transformed people's lifestyles, resulting in a fast-paced daily life. This shift has increased the consumption of convenient food options, leading to a preference for fast food, which is often high in carbohydrates and fats. Consequently, there has been a rise in obesity and related health issues, highlighting the importance of monitoring food intake. Automated systems utilizing artificial intelligence (AI) have emerged as potent tools for providing personalized dietary advice and monitoring. With the growing volume of food-related content on social media, including images and accompanying text, leveraging multimodal data has become essential for …
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 …
Clinical Outcomes, Patient-Reported Outcomes, And Efficiency Of Static Computer-Assisted Sinus Floor Augmentation: A Randomized Controlled Trial, Nattakarn Narongchai
Clinical Outcomes, Patient-Reported Outcomes, And Efficiency Of Static Computer-Assisted Sinus Floor Augmentation: A Randomized Controlled Trial, Nattakarn Narongchai
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objective: To investigate the patient-reported ,clinical outcomes and efficacy of static computer-assisted sinus floor augmentation (SCA-SFA), compared to freehand approach. Material and methods: 40 patients underwent lateral sinus augmentation (20 freehand-SFA + 20 SCA-SFA). Patient-reported outcomes were recorded in Visual Analog Scale (VAS) on days 1-7, 14 and intra- and post-operative complications were recorded on week 2,4 after surgery. Duration and operators’ assessment of SCA-SFA efficacy were recorded. Results: No statistically significant difference was found between the two groups with regards to PROMs and intra-, post-operative complications, apart from higher level of swelling for SCA-SFA patients on day 2 after …
Association Between Ageing Perception And Oral Health Dimensions In Thai Older People, Nattapat Khongsirisombat
Association Between Ageing Perception And Oral Health Dimensions In Thai Older People, Nattapat Khongsirisombat
Chulalongkorn University Theses and Dissertations (Chula ETD)
Background: Maintaining good oral health as people age is just as important as overall health. Ageing perception, how individuals perceive their ageing process, has been shown to affect health outcomes. However, the relationship between ageing perception and oral health, including oral health-related quality of life (OHRQoL), remains underexplored. Objective: This study explores the associations between ageing perception, oral health dimensions, and OHRQoL among older Thai people. Methods: The study was conducted in two phases. Phase I translated and validated the Thai version of the short-form Attitudes to Ageing Questionnaire (Thai AAQ-SF). Phase II focused on hypothesis testing through structured interviews …
The Effect Of Surface Treatments And Coffee Thermocycling On Color Stability And Translucency Of Cad-Cam Polychromatic High-Translucent Zirconia Compared With Lithium Disilicate Glass Ceramic, Ratchaphat Khomprang
The Effect Of Surface Treatments And Coffee Thermocycling On Color Stability And Translucency Of Cad-Cam Polychromatic High-Translucent Zirconia Compared With Lithium Disilicate Glass Ceramic, Ratchaphat Khomprang
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives: To evaluate effects of surface treatments on the color stability (ΔE) and translucency parameter (TP) of Gradient Multilayered yttria-stabilized Zirconia (GMZ), Ultra-translucent multilayered Zirconia (UTML) and lithium disilicate glass ceramic (LD) under coffee thermocycling. Methods: 27 samples from each material were classified into 3 groups (polished, glazed, and glazed+pumice). A dental spectrophotometer was utilized to measure the color coordinates before and after thermocycling. The color and translucency differences (ΔE and ΔTP) measurements were determined using the CIELAB formula, and their corresponding 50%:50% perceptibility and acceptability thresholds (PT and AT) were used for analysis. One-way ANOVA and Two-way ANOVA was …
Effect Of Chairside Silicone Polishing Systems On The Surface Roughness Of Cad/Cam Milled And Conventional Denture Base Materials, Sarita Apiromwijit
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 …
Analysis Of The Soft Tissue Chin Profile In Acceptable Aesthetic Profiles Using A 3-Dimensional Camera Facial Scan System Compared To Normative Values Based On 2-Dimensional Radiographic Analysis, Sasawat Putpinij
Chulalongkorn University Theses and Dissertations (Chula ETD)
Chin profile plays a critical role in determining lower facial aesthetics, significantly affects perceptions of facial balance and attractiveness. Conventional assessment methods, which primarily rely on two-dimensional cephalometric norms, are limited by projection errors and a reduced capacity to accurately evaluate soft tissue contours. The development of three-dimensional facial scanning technology has facilitated more accurate assessment of facial morphology; nevertheless, aesthetic evaluation in acceptable aesthetic profile using 3-dimensional camera facial scan remains no evidence. Hence, this study aimed to investigate soft tissue chin profiles in clinically acceptable facial aesthetics using a three-dimensional camera system, comparing with traditional two-dimensional cephalometric values. …
Oral Health-Related Quality Of Life, Patient’S Satisfaction And The Clinical Performance Of Anterior Ceramic Veneers Criteria In 10 Years Clinical Cross-Section Study, Thitiorn Panayong
Oral Health-Related Quality Of Life, Patient’S Satisfaction And The Clinical Performance Of Anterior Ceramic Veneers Criteria In 10 Years Clinical Cross-Section Study, Thitiorn Panayong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives: The purpose of this study was to evaluate the clinical performance of ceramic veneers after 9-10 years, assess oral health-related quality of life and patient’s satisfaction, and examine the associations between them. Materials and Methods: 30 patients who treated with ceramic veneers aged 9 to 10 years were recalled for a clinical examination. Each participant completed a questionnaire on satisfaction and oral health-related quality of life, using the Oral Impact on Daily Performance (OIDP) scale. The Chi-square or Fisher Exact test was used to assess associations between tooth position and professional evaluations of veneer success and individual items. Consistency …
The Effect Of Multimedia Information About Computer-Assisted And Freehand Dental Implant Surgery On Patients’ Knowledge, Anxiety, And Decision-Making, Veerawit Lukkanasomboon
The Effect Of Multimedia Information About Computer-Assisted And Freehand Dental Implant Surgery On Patients’ Knowledge, Anxiety, And Decision-Making, Veerawit Lukkanasomboon
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to evaluate the impact of multimedia and verbal information on patients' knowledge, anxiety, and decision-making regarding dental implant surgery, focusing on comparing computer-assisted and freehand techniques. This randomized controlled trial involved 100 patients divided into two groups: one receiving multimedia information (n=50) and the other receiving verbal information (n=50). Data were collected through self-administered questionnaires assessing patients' baseline information, knowledge, anxiety, and decision-making before and after receiving information about dental implant surgery techniques. Results showed significant increases in knowledge scores for both groups, with the multimedia group improving from 1.96 to 3.90 (p<0.001) and the verbal group from 2.0 to 3.98 (p<0.001). Anxiety levels decreased significantly in both groups, with reductions from 12.76 to 11.48 (p=0.001) in the multimedia group and from 13.92 to 12.16 (p<0.001) in the verbal group. The proportion of patients who decided to proceed with dental implant surgery increased from 70% to 78% in the multimedia group and from 54% to 66% in the verbal group. After receiving the information, more patients in both groups opted for computer-assisted implant surgery, though treatment costs remained a significant concern for some, leading to declines in surgery acceptance. Despite these findings, no significant differences were observed between the multimedia and verbal groups regarding knowledge improvements, anxiety reduction, or decision-making. In conclusion, multimedia and verbal information effectively enhanced patient knowledge and reduced anxiety about dental implant surgery, and both methods may influence patients' decisions regarding their preferred implant technique, with no significant differences between the two methods.
The Study On Surface Roughness And Corrosion Resistance Of Electropolished Laser Powder Bed Fusion Ti-6al-4v Eli Alloy, Venus Chatpaiboonwat
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
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 …
Effects Of Ai-Assisted Collaborative Learning On English Speaking Skill Of Myanmar Undergraduate Students, Tin Lin Kyaw
Effects Of Ai-Assisted Collaborative Learning On English Speaking Skill Of Myanmar Undergraduate Students, Tin Lin Kyaw
Chulalongkorn University Theses and Dissertations (Chula ETD)
The present study endeavored to: 1) examine effects of AI-assisted collaborative learning on English speaking skill of Myanmar undergraduate students, and 2) explore opinions of Myanmar undergraduate students towards AI-assisted collaborative learning. This research is a quasi-experimental study. The participants were 32 participants, selected through convenience sampling, as they were administered English speaking lessons for eight class periods. The instructional instrument involved lesson plans, while the research instruments contained pre- and post-tests of English speaking, and semi-structured interviews. The research findings revealed that 1) there were substantial developments in students’ English speaking skill after the implementation of AI-assisted collaborative learning, …
Contextual Matching And Aggregation Network For Mri Image Super-Resolution, Abdulhamid Muhammad
Contextual Matching And Aggregation Network For Mri Image Super-Resolution, Abdulhamid Muhammad
Chulalongkorn University Theses and Dissertations (Chula ETD)
High-resolution (HR) Magnetic Resonance Imaging (MRI) provides detailed visualization of healthy and pathological tissues, making it a vital tool for accurate diagnosis, and enhancing physicians’ ability to detect lesions with better precision. However, obtaining HR MRI images in practice is often challenging due to hardware limitations, extended scan durations, and patient discomfort. Super-resolution (SR) techniques have been developed to recover HR image from LR image. However, capturing and integrating local and global features remains a significant challenge, as many approaches inadequately model the complex contextual correlations across multiple scales thereby degrading reconstruction quality. To address these limitations, we propose an …
Modelling Of Competing Compensation And Excess Revenue Sharing In Project-Based Ppp Contracts: Machine Learning And Real Option Approaches, Lykeang Sorin
Chulalongkorn University Theses and Dissertations (Chula ETD)
Public Private Partnership (PPP) is now considered as a very common approach for the delivery of infrastructure projects, especially in developing countries in which fiscal budgets are limited. Most PPP projects are usually implemented as project-based, connecting existing infrastructure projects. However, transportation infrastructure projects as a whole work as a network of systems such as highway systems and mass rail transit (MRT) systems. Currently, the project-based approach to PPP implementation has created two unintended consequences: (1) fragmentation of the systems and (2) non-compete clause in PPP contracts preventing new development that may affect the future revenues of the concessionaire. The …
A High-Gain Wideband Antenna Employing Novel Partial Reflective Surfaces, Mia Maria Ulfah
A High-Gain Wideband Antenna Employing Novel Partial Reflective Surfaces, Mia Maria Ulfah
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this dissertation, different partially reflective surfaces (PRS) are investigated to improve the gain and bandwidth of a Fabry–Perot cavity (FPC) antenna for wireless local-area network (WLAN) and vehicle-to-vehicle (V2V) communication applications. Each of the proposed PRSs has the phase of a reflection coefficient that increases with frequency. This property of the PRS is required for a broadband characteristic of the FPC antenna, which is desirable for the intended applications. A U-shaped microstrip patch antenna (MPA) with a parasitic rectangular patch is used as a feed antenna. It is designed for operation in the WLAN and V2V frequency bands. The …
Development Of Calcium Oxide Sorbent From Waste Natural Materials For Co2 Capture, Muhammad Dody Isnaini
Development Of Calcium Oxide Sorbent From Waste Natural Materials For Co2 Capture, Muhammad Dody Isnaini
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aims to develop calcium oxide (CaO) sorbents for carbon oxide (CO2) capture by using various waste natural materials: eggshells, crab shells, and green mussel shells. These natural materials were used as precursors for the synthesis of CaO sorbents using the citric acid-assisted sol-gel method. Various characterization techniques, including N2 physisorption, XRD, XRF, CO2-TPD, TG/DTG, and FE-SEM, were performed to assess the physicochemical and thermal properties of the synthesized sorbents. The sorbent is investigated for its CO2 adsorption and recycle ability, as it has been a major issue for large-scale deployment of cyclic CO2 capture technology. This study also …
Development Of Porous Poly(Methylmethacrylate) Beads For Toxic Cytokine Removal Application, Nutchanon Putthabucha
Development Of Porous Poly(Methylmethacrylate) Beads For Toxic Cytokine Removal Application, Nutchanon Putthabucha
Chulalongkorn University Theses and Dissertations (Chula ETD)
Sepsis is a vital cause of death globally, primarily due to the uncontrolled secretion of cytokines that disrupt homeostasis. Hemoperfusion is an extracorporeal blood purification technique to treat sepsis that is uncomplicated and effective. The adsorbent material is the essence part of this technique. Since it has to direct contact with blood, the material requires necessary properties, including hemocompatibility, biocompatibility, mechanical stability, etc. Here in this thesis, we developed a new adsorbent material for hemoperfusion using PMMA beads suspension polymerization. Five different porogens, including ethyl acetate, tributyrin (short-chain triglycerides), MCT oil (medium-chain triglyceride), soybean oil (long-chain triglyceride), and toluene were …
Leveraging Gpt-4 For Thai Land And Building Tax Calculation In The Bangkok Area, Sadanan Arsaibun
Leveraging Gpt-4 For Thai Land And Building Tax Calculation In The Bangkok Area, Sadanan Arsaibun
Chulalongkorn University Theses and Dissertations (Chula ETD)
This paper explores the application of large language models (LLMs), particularly GPT-4, in the context of Thai land and building tax computation. We address challenges arising from the complexity of Thai tax regulations, the scarcity of Thai-language training data, and the structured, multi-variable nature of tax computation tasks. To enhance model performance, we employ few-shot prompting, decomposition-based reasoning, and retrieval-augmented generation (RAG). We further introduce a JSON-style output format to support structured conversational interactions, allowing the model to identify missing user inputs and guide data collection. A secondary o3-mini pass is used as an answer verifier, helping to assess the …
Design And Multi-Objective Optimization Of Methanol Reforming, High-Temperature Proton Exchange Membrane Fuel Cell And Organic Rankine Cycle Integrated System, Supawat Taweekayujan
Design And Multi-Objective Optimization Of Methanol Reforming, High-Temperature Proton Exchange Membrane Fuel Cell And Organic Rankine Cycle Integrated System, Supawat Taweekayujan
Chulalongkorn University Theses and Dissertations (Chula ETD)
The growing demand for electricity across all sectors has led researchers to focus on developing advanced electric generation technologies that offer high performance and are environmentally friendly. This study presents the design and multi-objective optimization of an integrated system combining sorption-enhanced chemical looping reforming of methanol (SECL-OSRM), high-temperature proton exchange membrane fuel cells (HT-PEMFCs), and a Recuperative-Regenerative Organic Rankine Cycle (RR-ORC). The hybrid system was simulated using Aspen Plus, focusing on energy, exergy, and exergoeconomic analyses. Sensitivity analyses of SECL-OSRM and ORC subsystems were performed to identify optimal operating conditions and working fluids. A Box-Behnken design of experiments approach generated …
An Attention-Guided Image Super-Resolution For Scene Text, Tithnorakneath Em
An Attention-Guided Image Super-Resolution For Scene Text, Tithnorakneath Em
Chulalongkorn University Theses and Dissertations (Chula ETD)
Scene Text Image Super-Resolution (STISR) is crucial in enhancing text recognition for low-resolution images, often degraded due to environmental and device limitations. While many existing STISR approaches leverage super-resolution techniques to refine image quality, they frequently need specialized mechanisms to extract text-specific features. Most existing methods were based on feature extraction methods that missed critical details, such as edges and text-background contrasts, that are usually important for recognition. In this work, we propose a new feature extraction method that uses Channel Attention and Spatial Attention mechanisms to emphasize features related to text, namely edges, contours, and spatial alignment. We add …
Uv-Vulcanized Natural Rubber Grafted With Methyl Methacrylate For Production Of Ultrafine Fully Vulcanized Natural Rubber Powder, Torntawat Kiratiphongwut
Uv-Vulcanized Natural Rubber Grafted With Methyl Methacrylate For Production Of Ultrafine Fully Vulcanized Natural Rubber Powder, Torntawat Kiratiphongwut
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research aimed to develop ultrafine fully vulcanized powdered natural rubbers (UFPNRs). The preparation process began with grafting methyl methacrylate (MMA) monomers onto natural rubber particles, followed by UV irradiation using an acrylate-based coagent and a photoinitiator. The final product was dried using a spray-drying technique. The successful grafting of MMA onto the natural rubber particles was confirmed using Fourier-transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). At a monomer concentration of 15 parts per hundred parts of dry rubber weight (phr), the highest grafting efficiency of 89 ± 0.7% was achieved. The research investigated the use of acrylate …
Efficacy Of Reticulocyte Hemoglobin Equivalent-Guided Versus Transferrin Saturation-Guided Iron Supplement Protocol In Hemodialysis Patients: A Cluster Randomized Controlled Trial, Chalermchon Suttaluang
Efficacy Of Reticulocyte Hemoglobin Equivalent-Guided Versus Transferrin Saturation-Guided Iron Supplement Protocol In Hemodialysis Patients: A Cluster Randomized Controlled Trial, Chalermchon Suttaluang
Chulalongkorn University Theses and Dissertations (Chula ETD)
BackgroundIron deficiency increases cardiovascular risk and all-cause mortality in hemodialysis patients. However, standard diagnostic tests, serum ferritin and transferrin saturation (TSAT), have limitations and are costly. Reticulocyte hemoglobin equivalent (RET-He) is a novel, less expensive marker for diagnosing iron deficiency. This study aimed to assess the non-inferiority of RET-He-guided intravenous (IV) iron supplementation compared with TSAT-guided supplementation in hemodialysis patients. MethodsA total of 138 hemodialysis patients were randomized into TSAT-guided (n = 68) and RET-He-guided (n = 70) groups. Both groups received intravenous iron according to a prespecified protocol. The primary outcome was the erythropoietin resistance index (ERI) at the …
Cost-Utility Analysis And Dosimetric Comparison Of Proton Beam Therapy And X-Ray Beam Therapy In Pediatric Medulloblastoma In Thailand, Chonnipa Nantavithya
Cost-Utility Analysis And Dosimetric Comparison Of Proton Beam Therapy And X-Ray Beam Therapy In Pediatric Medulloblastoma In Thailand, Chonnipa Nantavithya
Chulalongkorn University Theses and Dissertations (Chula ETD)
Background: The benefits of proton beam therapy (PBT) are evident in pediatric cancer, as survivors face long-term radiation-related side effects and lifetime costs. However, the higher cost of PBT presents a challenge, particularly in middle-income countries, like Thailand. This study analyzed dose to organs at risk (OARs), excess-relative risk (ERR) of cardiac mortality and the cost-utility of PBT versus X-ray beam therapy (XRT) for medulloblastoma in the context of Thailand. Methods: In the dosimetric phase, craniospinal irradiation (CSI) plans were generated using three-dimensional conformal radiotherapy (3D-CRT), volumetric modulated arc therapy (VMAT), and PBT. Vertebral body reduced dose (VBR)-CSI contouring was …