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2021

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Chemical Constituents Of Fan-Si Abutilon Indicum Stems, Arum Restu Widyasti Jan 2021

Chemical Constituents Of Fan-Si Abutilon Indicum Stems, Arum Restu Widyasti

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to isolate secondary metabolites from the stems of Abutilon indicum and to evaluate their α-glucosidase, pancreatic lipase, α-chymotrypsin inhibitory activity. Chromatographic fractionation of the n-hexane crude extracts led to the isolation of three known metabolite (1-3). The crude extract from all parts of the plant were evaluated for inhibitory activity on the alpha-glucosidase enzyme. The DCM-soluble roots were active with 10.2% at 25 μg/mL. The hexane and MeOH-soluble stems were active with 11.0% at 25 μg/mL and 8.0% at 0.25 μg/mL. The hexane, DCM, and MeOH-soluble leaves are active with 20.2% at 0.025 μg/mL; 20.0% at 0.025 …

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Modification Of Screen-Printed Carbon Electrode For Detection Of Pesticides, Kansuda Langor Jan 2021

Modification Of Screen-Printed Carbon Electrode For Detection Of Pesticides, Kansuda Langor

Chulalongkorn University Theses and Dissertations (Chula ETD)

Methyl parathion (MP) is an organophosphate pesticide broadly used in agriculture to protect crops and fruits from the damages caused by insects and pests. However, when it is used in large quantities, it can be potentially toxic to humans and animals, causing many poisoning effects. Moreover, its residues can also penetrate the food chain (via agriculture food products) as well as contaminating the environment, leading to air, water and soil pollution. Therefore, rapid determination and reliable quantification of trace level of MP are crucially needed for food safety and environmental monitoring. In this work, a low-cost and portable electrochemical sensor …

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Synthesis Of Quantum Dot-Based Fluorescent Sensors For Detection Of Anionic Metabolites And Copper (Ii) Ion, Nattakarn Phromsiri Jan 2021

Synthesis Of Quantum Dot-Based Fluorescent Sensors For Detection Of Anionic Metabolites And Copper (Ii) Ion, Nattakarn Phromsiri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Oxalate, citrate, and urate are the anionic metabolites that are the products of the metabolism pathway of living organisms. The high level of these anionic metabolites is related to the diseases. For example, the excess amount of oxalate ions in urine indicates the risk of kidney stones, while the level of citrate can suggest the risk of cancer. The level of urate in urine is related to the risk of gout. The detection of these anionic metabolites is significant and still remains a challenge. Thus, this work aims to develop the more sensitive and selective fluorescence sensing of oxalate in …

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Lamellar Inorganic Solids And Biochar Nanocomposites For Sorptive Removal Of Metal Ions And Nitrophenol, Sutasinee Sutthiklub Jan 2021

Lamellar Inorganic Solids And Biochar Nanocomposites For Sorptive Removal Of Metal Ions And Nitrophenol, Sutasinee Sutthiklub

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this research, the adsorbents of ternary-component composites were developed to remove various types of toxic chemicals. The selected three components are clay, MgAl-layered double hydroxide (MgAl-LDH) and biochar because they are nontoxic and low cost and also possess high adsorption capacity and high surface area. The composites were synthesized by the combination of post-pyrolysis and co-precipitation methods, and characterized by XRD and SEM-EDS. The result shows that clay and LDH particles distributed and deposited on the biochar matrix, confirming the coexistence of three phases in micrometer and nanometer scales. Ni2+, CrO42- and 4-Nitrophenol were chosen as the representatives of …

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Subjective Perception Of Nasal Breathing ; Identifying Patient At Risk Of A Poor Surgical Outcome, Dichapong Kanjanawasee Jan 2021

Subjective Perception Of Nasal Breathing ; Identifying Patient At Risk Of A Poor Surgical Outcome, Dichapong Kanjanawasee

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.

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Efficacy And Safety Of Phlai Capsule Compared To Placebo As The Treatment In Allergic Rhinitis Patients, Minh Phuoc Hoang Jan 2021

Efficacy And Safety Of Phlai Capsule Compared To Placebo As The Treatment In Allergic Rhinitis Patients, Minh Phuoc Hoang

Chulalongkorn University Theses and Dissertations (Chula ETD)

: Preclinical studies demonstrated anti-inflammatory effects of Phlai capsule containing Zingiber montanum (J.Koenig) Link ex A.Dietr. extract. However, its clinical effect on allergic rhinitis is not evident. : We sought to assess the efficacy and safety of Phlai for treating allergic rhinitis. : A randomized, double-blind, placebo-controlled study was conducted. Patients with allergic rhinitis were randomized into three groups and received 100 mg (compound D 4 mg) of Phlai capsule or 200 mg (compound D 8 mg) of Phlai capsule or placebo once a day for 4 weeks. The primary outcome was a change in the reflective total five symptom …

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Conformance Checking And Discovery Of Information Service Request Process, Liam Khaosanoi Jan 2021

Conformance Checking And Discovery Of Information Service Request Process, Liam Khaosanoi

Chulalongkorn University Theses and Dissertations (Chula ETD)

Process mining is a form of business process analysis. The approach could support organizations in retrieving structured process information by using recorded process data to discover, monitor and improve the processes. In this work, the process mining technology is applied for conformance checking and discovering an organization’s Information Service Request process in reality as a case study. Currently, the reference model was drawn as a simple flow using Microsoft Word. The proposed method starts with writing a VBA script to extract traces from the drawing that enables the generation of XES file used for modeling the reference process in Petri …

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Approaches For Developing Academic Management Of Secondary Schools In Cambodia Based On The Concept Of Exemplary Leadership, Soksamnang Pheach Jan 2021

Approaches For Developing Academic Management Of Secondary Schools In Cambodia Based On The Concept Of Exemplary Leadership, Soksamnang Pheach

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purposes of this study were 1. to examine the exemplary leadership level of Cambodian secondary school students in Battambang Province and to study the priority needs of academic management development of secondary schools in Cambodia based on the concept of exemplary leadership, 2. to develop the approaches for developing the academic management of secondary schools in Cambodia based on the concept of exemplary leadership. The data were collected from 12 sample schools, choosing one school to represent one district. The study informants included school principals, vice-principal, teachers, and students in Battambang province accounting for 169. The research instrument used …

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Deep Learning With Attention Mechanism For Iterative Face Super-Resolution, Krit Duangprom Jan 2021

Deep Learning With Attention Mechanism For Iterative Face Super-Resolution, Krit Duangprom

Chulalongkorn University Theses and Dissertations (Chula ETD)

Face images are widely used in many applications, such as face recognition and face identification. Regarding security, face identification is used to track the crimes. However, the camera's low resolution and environmental degradation problem hinders the face application's performance. In this thesis, we study face image super-resolution to restore the image from low-resolution to high-resolution. We proposed deep learning with an attention mechanism for iterative face super-resolution that included an image super-resolution network and face alignment network combined. The input low-resolution image is enlarged into a super-resolution face image. Then, the image has repeatedly estimated the alignment to enhance the …

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Deployment Of Rfid, Gps And Iot Technology For Medical Specimen Logistic System, Mya Myet Thwe Chit Jan 2021

Deployment Of Rfid, Gps And Iot Technology For Medical Specimen Logistic System, Mya Myet Thwe Chit

Chulalongkorn University Theses and Dissertations (Chula ETD)

This paper aims to implement a specimen logistic system using RFID technology combined with modern IoT technology in Chulalongkorn hospital. The specimen is a sample collected from the human body. Samples can be urine, saliva, sputum, feces, semen, and other bodily fluids and tissues. Samples are usually collected from the patient and stored in a test tube. Then test tubes are delivered to the corresponding laboratory for examination. Normally, barcodes are tagged over the test tubes for the purpose of recording patient information. In this work, RFID is deployed on the test tube instead for patient data logging. This solution …

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Structural Priming And The Acquisition Of English Dative Constructions By L1 Thai Learners, Jaturaporn Kongbang Jan 2021

Structural Priming And The Acquisition Of English Dative Constructions By L1 Thai Learners, Jaturaporn Kongbang

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purpose of the present study is to examine whether structural priming can facilitate L1 Thai learners’ acquisition of English dative constructions, both English DO construction and English PO construction and to investigate whether different priming conditions have different learning effects on L1 Thai learners’ acquisition of English dative constructions. The first hypothesis states that the L1 Thai learners produce English dative constructions, both DO construction and PO construction, at higher rates after receiving the structural priming experiments. However, the similar structure, i.e. the English PO construction is used more frequently than the different structure, i.e. the English DO construction. …

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Environmental Ethics, Survival And Apocalypse: An Analysis Of Margaret Atwood’S Maddaddam Trilogy, Sarawut Kururatphan Jan 2021

Environmental Ethics, Survival And Apocalypse: An Analysis Of Margaret Atwood’S Maddaddam Trilogy, Sarawut Kururatphan

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis examines the connection of ethics and survival in the pre- and post-apocalyptic worlds in Margaret Atwood's MaddAddam trilogy: Oryx and Crake (2003), The Year of the Flood (2009), and MaddAddam (2013). It investigates the author’s imaginings of a dystopian society marked by rampant technocratic capitalism and unchecked scientism in Oryx and Crake. Applying Murray Bookchin's social ecology to shed light on the root causes of the apocalypse, it argues that hierarchical ideology and diversiform inequality deeply rooted in society lead to warped ethics, affecting the crisis. This thesis also examines environmental ethics which is embedded in the belief …

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Lexical Bundles In Mainstream Movie'and Noah Baumbach's Selected Film Scripts: A Corpus-Based Study Of Telecinematic Discourse, Runze Xu Jan 2021

Lexical Bundles In Mainstream Movie'and Noah Baumbach's Selected Film Scripts: A Corpus-Based Study Of Telecinematic Discourse, Runze Xu

Chulalongkorn University Theses and Dissertations (Chula ETD)

The present study aims to investigate and compare language use in film scripts of American mainstream movies and in Noah Baumbach's, focusing on lexical bundles and their functional contributions to meanings and aesthetic values of the given texts. Two corpora were compiled as the datasets: Mainstream Film Corpus (MFC), which consists of 100 screenplays of top Hollywood blockbusters during 2005-2019, and Noah Baumbach Corpus (NBC), which contains five film scripts written by Noah Baumbach alone. Frequent four-word lexical bundles were extracted and approached qualitatively in terms of their functions, following Biber et al. (2004) and Biber (2006) as analytical frameworks. …

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Sustainable Livelihood Of Fishermen: A Case Study In The City Of Semarang, Indonesia, Adam Prayuda Jan 2021

Sustainable Livelihood Of Fishermen: A Case Study In The City Of Semarang, Indonesia, Adam Prayuda

Chulalongkorn University Theses and Dissertations (Chula ETD)

The study aims to look at the social and economic circumstances of fishermen in Semarang City, their local livelihoods, and the significant role of the state through Semarang Fisheries Service to improve the economic livelihoods and social welfare of this marginal group. It applies a sustainable livelihood framework to look at the compatibility and empowerment process that can affect the Fishermen's Community. This research used mixed methods to understand the problem and apply narrative techniques for case studies to obtain the data. Different sources of information are used to triangulate information, perspectives, and expected results to increase knowledge in providing …

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Developing Tanjung Kelayang As A New Bali: An Analysis Of Sustainable Tourism Policy And Implementation, Herdi Andrariladchi Jan 2021

Developing Tanjung Kelayang As A New Bali: An Analysis Of Sustainable Tourism Policy And Implementation, Herdi Andrariladchi

Chulalongkorn University Theses and Dissertations (Chula ETD)

Indonesia has seen the success of Bali as the most prominent tourism destination in the country. Therefore, the initiative to deploy the benefits of tourism development throughout several regions of Indonesia is known as the “10 New Bali’s”. Nevertheless, it is still questionable whether Bali is an example of sustainable tourism or not. In developing the “10 New Bali’s”, the Indonesian government is aiming at increasing the number of tourists rather than at achieving the goal of sustainable tourism destination development. One of the destinations designated under this initiative is Tanjung Kelayang in Belitung Island, and therefore it is selected …

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Challenges Of Urban Forest Park Restoration On Post-Closure Landfill : Perception And Future Engagement From The Local Communities, Intan Pransischa Fitri Jan 2021

Challenges Of Urban Forest Park Restoration On Post-Closure Landfill : Perception And Future Engagement From The Local Communities, Intan Pransischa Fitri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Urban forest park development is considered a promising planning tool in tackling some of the problems associated with urbanisation, such as pollution and urban heat island effects. Individual perceptions are pivotal in the urban forest park development. Their significant factors were aimed to address the community's needs and increase the recognition through the disruptive change of land function and urban living toward urban forest park development. The framework of local community engagement in urban forest park development was proposed. Field observation and questionnaires survey of 168 respondents were selected from five villages located 50 meters-1000 meters radius from the site. …

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Preventing Occupational Respiratory Disease From Exposures In Office Building : Case Study Covid-19, Panupant Phapant Jan 2021

Preventing Occupational Respiratory Disease From Exposures In Office Building : Case Study Covid-19, Panupant Phapant

Chulalongkorn University Theses and Dissertations (Chula ETD)

The COVID‐19 pandemic has affected human life in every possible way, and, alongside this, the need has been felt that office buildings and workplaces must have protective and preventive layers against COVID‐19 transmission so that a smooth transition from ‘work from home’ to work from office’ is possible. The present study reviews international agency regulations, country regulations, updated journal articles, etc., to critically understand lessons learned from COVID‐19 and evaluate the expected changes in sustainability requirements of office buildings and workplaces. The built environment, control environment, and regulatory environment around office buildings and workplaces have been put under test on …

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Developing A System Of Community-Based Agritourism For Sustainable Local Food Systems: A Multi-Case Study Of Rural Livelihood Diversification And Sustainable Urban Consumption In City-Regional Bangkok, Sofia Anna Enrica Cavalleri Jan 2021

Developing A System Of Community-Based Agritourism For Sustainable Local Food Systems: A Multi-Case Study Of Rural Livelihood Diversification And Sustainable Urban Consumption In City-Regional Bangkok, Sofia Anna Enrica Cavalleri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Current food systems fail to directly link rural producers and urban consumers. This research explores and categorizes emerging community-based agritourism practices as strategies to reconnect rural food producers with urban consumers. The main research question of this study is: how can community-based agritourism link rural food producers and urban consumers as a rural livelihood diversification strategy? Mixed methods for data collection were selected to answer this question and analyzed with a deductive and inductive approach. These include the review of secondary grey and academic literature, shadow observation in three rural provinces, content validity index calculation performed by experts (n = …

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Investigating Consumers' Perspective And Impact On Green Cosmetics And Personal Care Products In Thailand, Tawalhathai Suphasomboon Jan 2021

Investigating Consumers' Perspective And Impact On Green Cosmetics And Personal Care Products In Thailand, Tawalhathai Suphasomboon

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aims to investigate consumers’ perspectives and impact on green cosmetics and personal care products in Thailand. Specifically, it explores the sustainability movement for the cosmetics and personal care industry, analyzes Thai consumer behavioral intention toward the consumption of green cosmetics and personal care products, and evaluates the impact of related policies that may affect green business transitions and consumers’ intention to purchase green cosmetics and personal care products. The movement of industry and related policies were analyzed by means of Life Cycle Thinking approach. Hypotheses were formulated based on The Perceived Value Theory with extended factors of environmental …

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A Comparison Of Implant Stability Between Two Dental Implant Designusing Two Different Stability Measuring Technique, Chanikarn Chaksupa Jan 2021

A Comparison Of Implant Stability Between Two Dental Implant Designusing Two Different Stability Measuring Technique, Chanikarn Chaksupa

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective To investigate the primary stability of aggressive thread design implant comparing to nonaggressive thread design implant and to evaluate the correlation between ISQ values and IST values. Materials and methods 96 implants were used in this study. 48 BLT Straumann® and 48 BLX Straumann® were used. All implants were digitally planned and placed in 3D printed model using computer assisted guided surgery. The edentulous area at models were packed with randomized pattern of four different kinds of polyurethane blocks to replicate mixed cancellous bone. Postoperative implant stability measurement was performed immediately after implant insertion. Implant stability was measured by …

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The Relative Occlusal Force Of Natural Tooth Adjacent To Distal Extension Implant Support Fixed Prosthesis Using T-Scan Analysis : A Cross Sectional Study, Chin Purintarapiban Jan 2021

The Relative Occlusal Force Of Natural Tooth Adjacent To Distal Extension Implant Support Fixed Prosthesis Using T-Scan Analysis : A Cross Sectional Study, Chin Purintarapiban

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: This cross-sectional study aimed to compare the relative occlusal force between implant in the distal end and tooth adjacent to implant in maximum intercuspation. Methodology: Patients with implant restoration replacing teeth in free end space adjacent to natural tooth were recalled. The occlusion is examined as shim stock passes through the occluded tooth in heavy or light bites. The heavy bite or a light bite with shim stock that cannot pull through is HB1 or LB1. If the shim stock can pull through it is considered HB0 or LB0. The implant is classified into 3 groups, HB1LB0, HB1LB1, and …

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Football As A Tactical Innovation For Mobilization: A Study Of Fc Barcelona And The Catalan Independence Movement, Phawin Seangkumchoo Jan 2021

Football As A Tactical Innovation For Mobilization: A Study Of Fc Barcelona And The Catalan Independence Movement, Phawin Seangkumchoo

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Catalan Independence Movement is the movement in the Northern region of Spain which aims to be independent from Spain cause of problems in politics and economic. The Catalan mobilization not only marches on the street but also plays their role through the Spanish political procedure. In Catalan, the referendum on independence was issued in 2009-2011, 2014, and 2017. This study focuses on the Catalan mobilization tactical innovation which uses football as a tool against Spain. In this case, football which was used mean ‘FC Barcelona,’ one of the famous football club in the world. This study aims to identify …

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Eu-Vietnam Fta: Implications For Thailand, Uthaipan Promkhatkaew Jan 2021

Eu-Vietnam Fta: Implications For Thailand, Uthaipan Promkhatkaew

Chulalongkorn University Theses and Dissertations (Chula ETD)

In 2007, the EU launched a region-to-region Free Trade Agreement (FTA) with the ASEAN; however, negotiations were suspended in 2009, and the EU subsequently decided to negotiate bilateral FTAs with individual ASEAN member states. Thailand, a parliamentary democratic country, launched the first round of trade negotiations with the EU in 2013, but they were put on hold due to the military coup in 2014. On the other hand, the EU still continued to negotiate and ultimately concluded the FTA with Vietnam in 2020 despite the fact that Vietnam is one of the world’s five remaining communist states. This has raised …

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Effects Of Ferulic Acid And Uv Curing On Properties Of Soy Protein Film, Md Shakil Jan 2021

Effects Of Ferulic Acid And Uv Curing On Properties Of Soy Protein Film, Md Shakil

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this study was to explore the effect of UV-C curing on the properties of ferulic acid-added soy protein film. The films were fabricated from soy protein isolate and added with 1.5% ferulic acid. UV-C radiation was applied at four different doses (0.32, 1.56, 4.00, 12.00 J/cm2) to either preformed film or film-forming solution. The mechanical, physicochemical, and morphological properties of the film samples were investigated. Ferulic acid addition and UV-C curing at 0.32 J/cm2 posed a significant effect on film thickness while film density was slightly affected by ferulic acid addition and/or UV-C treatment. UV-C irradiation of …

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Quality Control Of Chemical Grade Calcium Carbonate From Lopburi Limestone Deposit In Thailand, Pimpichcha Teawpanich Jan 2021

Quality Control Of Chemical Grade Calcium Carbonate From Lopburi Limestone Deposit In Thailand, Pimpichcha Teawpanich

Chulalongkorn University Theses and Dissertations (Chula ETD)

Calcium carbonate (CaCO3) is naturally produced from calcite, limestone, chalk, and marble. It is being used as raw material in various industries (e.g., cement, plastic, paint, paper, and pharmaceutical industries). The low-grade CaCO3 samples obtained from a calcite plant at Khoktum Sub-district, Muang Lopburi District, Lopburi Province, Thailand were used in this study. These samples contain more than 98% of CaCO3 while Fe2O3 contents are higher than 0.1% and increased after finished the process. Because of this problem, the products could not be sold since lower Fe2O3 contents are required (e.g., ≤0.05% for filler grade and ≤ 0.1% for animal …

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The Effectiveness Of Asiaticoside On Osteogenic Differentiation Ability In Aging Human Periodontal Ligament Cells In Vitro, Adisa Suthirathikul Jan 2021

The Effectiveness Of Asiaticoside On Osteogenic Differentiation Ability In Aging Human Periodontal Ligament Cells In Vitro, Adisa Suthirathikul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Retaining teeth is essential for the quality of life of the aging population. However, aging has biological effects in periodontal ligament cells with significant changes in their proliferative rate and regenerative function. Asiaticoside, extracted from Centella asiatica, was found to have potential in osteogenic differentiation and mineralization in human periodontal ligament cells (HPDLCs). The aim of this study is to investigate the effect of asiaticoside on the aging HPDLCs osteogenic differentiation and mineralization. Aging HPDLCs, retrieved from patients age 60 and above, were confirmed aging status using Senescence-Associated ß -Galactosidase assay. The cells were incubated with various concentrations of asiaticoside …

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Utilization Of Rain Tree (Samanea Saman) Residue As Modified Adsorbent To Treat Oil And Grease In Canteen Wastewater, Elga Riesta Puteri Jan 2021

Utilization Of Rain Tree (Samanea Saman) Residue As Modified Adsorbent To Treat Oil And Grease In Canteen Wastewater, Elga Riesta Puteri

Chulalongkorn University Theses and Dissertations (Chula ETD)

The utilization of waste materials as adsorbent precursors is gaining intention to treat fats, oils, and greases (FOG), especially in wastewater treatment. Tree residue, an abundant waste, provides a potential feedstock to be converted into valuable materials. This research aimed to develop modified adsorbent prepared from rain tree (Samanea saman) residue for FOG treatment. The synthesis process of modified adsorbent was conducted by chemical pretreatment using different chemical agents (i.e., NaOH, ZnCl2, and H3PO4­). The pre-treated twigs and leaves (1:4 ratio) were continued by pyrolysis process at different temperatures (i.e., 350, 550, and 750oC) using a heating rate of 10oC …

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Changes In Surface Water And Sediment Quality At A Complex Tidal-Influenced River: A Case Study Of Ganh Hao River, Mekong Delta, Vietnam, Muoi Le Van Jan 2021

Changes In Surface Water And Sediment Quality At A Complex Tidal-Influenced River: A Case Study Of Ganh Hao River, Mekong Delta, Vietnam, Muoi Le Van

Chulalongkorn University Theses and Dissertations (Chula ETD)

The research was carried out to determine the extent of surface water and sediment pollution using the physicochemical parameters and heavy metal concentrations. The surface water and sediment samples were obtained from 25 sites along the river on March 22 and September 5, 2019 at the main river influenced by the complex tidal regime and aquaculture practices in Ca Mau peninsular in the Vietnamese Mekong Delta. The water quality was compared with international and national standards, while the sediment quality was compared with Vietnamese standards and pollution indices (geo-accumulation index, contamination factor, and pollution load index). Principal component analysis (PCA) …

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Health Risk Assessment Of Toxic Metals In Commonly Consumed Salad Leafy Vegetables In Bangkok, Zin Htoo Hlyan Jan 2021

Health Risk Assessment Of Toxic Metals In Commonly Consumed Salad Leafy Vegetables In Bangkok, Zin Htoo Hlyan

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objectives of this study were 1) to investigate concentrations of toxic metals including As, Cd, and Pb in the commonly consumed salad leafy vegetables which were sold in Bangkok, and 2) to assess potential human health risks of As, Cd, and Pb exposure via salad leafy vegetables consumption. A total of 120 samples were randomly collected from local fresh markets in Bangkok. The total concentrations of toxic metals were determined by an inductively coupled plasma mass spectroscopy (ICP-MS). Total concentrations of As, Cd and Pb in coral lettuce (CL), red coral (RC) and green oak (GO) for soil cultivation …

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The Application Of Machine Learning In Clustering Borderline Mild Cognitive Impairment Among Aging Thai People Living With Hiv, Akarin Hiransuthikul Jan 2021

The Application Of Machine Learning In Clustering Borderline Mild Cognitive Impairment Among Aging Thai People Living With Hiv, Akarin Hiransuthikul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Many people living with HIV (PLWH) have cognitive impairment. Details of cognitive impairment subtypes are lacking. Unsupervised machine learning (ML) can reveal hidden subgroups within heterogeneous data. The study aimed to determine clusters of aging Thai PLWH with borderline cognitive impairment using unsupervised ML. HIV-NAT 207 study enrolled Thai PLWH aged ≥50 years. Cognitive performance was evaluated by the Thai-validated Montreal Cognitive Assessment (MoCA). This study included participants who scored between 23 and 27. The score of each cognitive domain served as cluster variables for the K-means algorithm. Among 340 PLWH, 177 (52.1%) scored between 23 and 27. Median age …

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