Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 784051 - 784080 of 5206978

Full-Text Articles in Entire DC Network

A Holistic Approach To Hurricane Preparedness, Edwina A. Ward Jan 2022

A Holistic Approach To Hurricane Preparedness, Edwina A. Ward

Department of Conflict Resolution Studies Theses and Dissertations

Hurricanes are billion-dollar disasters, and current climate models suggest that their frequency and strength will only get worse because of global warming. Gulf Coast residents living in Florida, Louisiana, Mississippi, Alabama, and Texas worry about hurricane season annually and the goal of this dissertation was to measure their hurricane preparedness. This study surveyed 971 participants who have experienced hurricanes. Building on the theoretical foundations of quantitative survey research, the researcher conducted the study with the goal of answering the following questions: How do families in The Gulf Coast prepare for hurricanes, and how do local authorities prepare for the holistic …


Recognizing And Addressing Conflict That Emerges From Sociotechnical Change In Higher Education, Kathleen Ann Watkins-Richardson Jan 2022

Recognizing And Addressing Conflict That Emerges From Sociotechnical Change In Higher Education, Kathleen Ann Watkins-Richardson

Department of Conflict Resolution Studies Theses and Dissertations

Today’s unprecedented technology growth impacts at many levels—from individuals to groups to society. This study aims to characterize how exponential digital technology growth and organizational change is explained and experienced in a university setting deploying new instructional technologies—and how or where conflict emerges. Organizational conflict is a phenomenon that takes many forms and may not be fully recognized. This dissertation highlights theories of technology invention and disruption, the dynamics of sociotechnical change (defined as the interdependencies between people, technology, and the environment) and response in organizations, complex adaptive systems, and practice theory of change. It considers current technological forces at …


Optimizing Commercial Vehicle Enforcement Investments And Activities To Improve Safety And Increase Revenue Collections, Brian Howell, Jennifer Walton, Andrew Martin Jan 2022

Optimizing Commercial Vehicle Enforcement Investments And Activities To Improve Safety And Increase Revenue Collections, Brian Howell, Jennifer Walton, Andrew Martin

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet (KYTC) owns and maintains 14 fixed weigh stations for commercial vehicle enforcement. The Kentucky State Police (KSP) is responsible for staffing these facilities to conduct enforcement, while KYTC is responsible for constructing and maintaining these facilities. Like many states, Kentucky has experienced a decline of enforcement personnel to operate weigh stations limiting its ability to conduct inspections for safety enforcement and revenue collection. This study analyzes three CMV facilities for their impact on safety enforcement and revenue collection and determines their viability for potential replacement. All three existing weigh stations in Hardin, Fulton, and Henderson counties …


Admissions Magazine Winter 2022, Embry-Riddle Aeronautical University Jan 2022

Admissions Magazine Winter 2022, Embry-Riddle Aeronautical University

Admissions Magazine

Out Of This World: Creating an innovative, self-healing polymer for use in aerospace settings and soft electronics.

  • Who We Are
  • Eagles Land in the Top 10 at AIAA's Design, Build, Fly Competition
  • Hands-On Experiences
  • Point Guard's Pursuit of Excellence
  • Flying Full Circle
  • A Passion for Research
  • Choreographing a Career Path
  • All-in With Aviation
  • Out-of-This-World Discoveries
  • Now Trending: We are living in historic times where the aerospace industry is constantly pushing the boundaries of innovation.
  • Worldwide/Online
  • Soaring Into a Dream Career
  • Guiding the Next Generation
  • Florida Campus
  • NASA Intern Explores the Business of Space
  • Uplifting Latina Aviators
  • Robot Revolution
  • Arizona Campus …


Effects Of Fingerroot (Boesenbergia Rotunda) Powder On Egg Performance, And Quality, Egg Yolk Malondialdehyde In Laying Hens, Miftah Nurfarid Jan 2022

Effects Of Fingerroot (Boesenbergia Rotunda) Powder On Egg Performance, And Quality, Egg Yolk Malondialdehyde In Laying Hens, Miftah Nurfarid

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to determine the effect of fingerroot powder supplementation on the performance of laying hens, egg quality, and malondialdehyde in the egg yolk. A total of 192 Hy-Line brown laying hens aged 43 weeks were divided into four treatment groups with 48 hens in each group (8 replicates; 6 birds each). The treatments were the control (basal diet), basal diet supplemented with vitamin E at 250 mg/kg, basal diet plus 20 g fingerroot powder/kg, and basal diet plus 40 g fingerroot powder/kg. Performance parameters were analyzed in the following two experimental period: 1 to 3 week and 4 …


Beyond Quenching Profile For Singular Semilinear Parabolic Partial Differential Equations With Mixed Boundary Conditions, Benjamin Thaitavorn Jan 2022

Beyond Quenching Profile For Singular Semilinear Parabolic Partial Differential Equations With Mixed Boundary Conditions, Benjamin Thaitavorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.


Numerical Approximation To Ruin Probability Of Generalization Of Classical Risk Model, Kittiwat Woragate Jan 2022

Numerical Approximation To Ruin Probability Of Generalization Of Classical Risk Model, Kittiwat Woragate

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.


Random Forest Of Mixed Decision Trees And Minority Condensation Decision Trees For Class Imbalanced Problem, Suvaporn Homjandee Jan 2022

Random Forest Of Mixed Decision Trees And Minority Condensation Decision Trees For Class Imbalanced Problem, Suvaporn Homjandee

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.


3d Building Internal Structural Component Segmentation From Point Cloud Data Using Dbscan And Modified Ransac With Normal Deviation Conditions, Thanapon Doougphummet Jan 2022

3d Building Internal Structural Component Segmentation From Point Cloud Data Using Dbscan And Modified Ransac With Normal Deviation Conditions, Thanapon Doougphummet

Chulalongkorn University Theses and Dissertations (Chula ETD)

Nowadays, the laser scanner plays an important role as a tool to capture building structure in a form of point cloud which can be used to draw a blueprint or a floor plan for reconstruction or renovation of an existing building. The point cloud data represent a shape or an object in three dimensions. This point cloud together with the utilization of Building Information Modeling (BIM) which is a workflow that provides information about the foundation and structure measurement of a building, make a planning and design to construction more convenient and efficient in several aspects than the traditional way. …


Production And Biological Activities Of Oligo Pectin From Early Immature Fruit Of Durio Zibethinus L., Aunchiya Pitaksa Jan 2022

Production And Biological Activities Of Oligo Pectin From Early Immature Fruit Of Durio Zibethinus L., Aunchiya Pitaksa

Chulalongkorn University Theses and Dissertations (Chula ETD)

Early immature durian (EID) fruits, 30-45 days after anthesis with 6-12 cm in length, are considered agricultural waste from cultivation. It is known that durian rinds of mature fruits contain pectin, but there have been no reports on the pectin content of early immature durian (EID) fruits. Therefore, the objective of this study was to determine the pectin content in EID fruits. We extracted pectin from EID fruits using distilled water at different temperatures (25°C, 50°C, and 75°C) for 1 h to investigate pectin content. Instrumental analyses, including X-ray diffraction (XRD) and Fourier Transform Infrared Spectrometer (FT-IR), confirmed the presence …


X-Ray Computerized Microtomography And Confocal Raman Microscopy As Complementary Techniques To Conventional Imaging Tools For The Microstructural Characterization Of Cheddar Cheese, Antonio Lourenco, Stephan Handschuh, Mark Fenelon, Laura G. Gómez-Mascaraque Jan 2022

X-Ray Computerized Microtomography And Confocal Raman Microscopy As Complementary Techniques To Conventional Imaging Tools For The Microstructural Characterization Of Cheddar Cheese, Antonio Lourenco, Stephan Handschuh, Mark Fenelon, Laura G. Gómez-Mascaraque

Research Outputs: 2025-Present

This study explored the use of X-ray computerized microtomography (micro-CT) and confocal Raman microscopy to provide complementary information to well-established techniques, such as confocal laser scanning microscopy (CLSM), for the microstructural characterization of cheese. To evaluate the potential of these techniques, 5 commercial Cheddar cheese samples, 3 with different ripening times and 2 with different fat contents, were analyzed. Confocal laser scanning microscopy was particularly useful to describe differences in fat and protein distribution, especially between the 2 samples with different fat contents. The quantitative data obtained through image analysis correlated well with the nutritional information provided in the product …


Label-Free Quantitative Proteomics Analysis Of Adriamycin Selected Multidrug Resistant Human Lung Cancer Cells, Esen Efeoglu, Michael Henry, Martin Clynes, Paula Meleady Jan 2022

Label-Free Quantitative Proteomics Analysis Of Adriamycin Selected Multidrug Resistant Human Lung Cancer Cells, Esen Efeoglu, Michael Henry, Martin Clynes, Paula Meleady

Research Outputs: 2025-Present

The development of drug resistance in lung cancer is a major clinical challenge, leading to a 5-year survival rate of only 18%. Therefore, unravelling the mechanisms of drug resistance and developing novel therapeutic strategies is of crucial importance. This study systematically explores the novel biomarkers of drug resistance using a lung cancer model (DLKP) with a series of drug-resistant variants. In-depth label-free quantitative mass spectrometry-based proteomics and gene ontology analysis shows that parental DLKP cells significantly differ from drug-resistant variants, and the cellular proteome changes even among the drug-resistant subpopulations. Overall, ABC transporter proteins and lipid metabolism were determined to …


Of Rights And Regulation, Stephen W. Sawyer, William J. Novak Jan 2022

Of Rights And Regulation, Stephen W. Sawyer, William J. Novak

Book Chapters

This chapter explores the development of social provisioning as a matter not of right but of democratic administration in France and the United States in the nineteenth century. The authors take issue with conventional chronologies of rights development, which see civil and political rights being developed in the eighteenth and nineteenth centuries, with social rights appearing in the twentieth. Such categories and sequencing obscure the ways in which democratic administrations took the problem of social provisioning seriously. A history of socio-economic rights cannot be distinguished from the less formal technologies of socio-economic regulation that were an integral part of the …


Susan Reynolds, John G. H. Hudson, David L. D'Avray Jan 2022

Susan Reynolds, John G. H. Hudson, David L. D'Avray

Book Chapters

Susan Reynolds was elected to the British Academy after she had worked out a new framework for the medieval history of England, France, Germany and northern Italy. The breakthrough book was her Kingdoms and Communities in Western Europe 900–1300 (1984); it brought all levels of society together in a synthesis, and was a stunning achievement. Her subsequent Fiefs and Vassals (Oxford, 1994) left a generation reluctant even to use the word ‘feudalism’, and other important contributions continued until not long before she died. In 2001 she was honoured with a Festschrift entitled Law, Laity and Solidarities.


Sustainability Of Breastfeeding Interventions To Reduce Child Mortality Rates In Low, Middle-Income Countries: A Systematic Review Of Randomized Controlled Trials, Alexis Engelhart, Stacey Mason, Ucheoma Nwaozuru, Chisom Obiezu-Umeh, Victoria Carter, Thembekile Shato, Titilola Gbaja-Biamila, David Oladele, Juliet Iwelunmor Jan 2022

Sustainability Of Breastfeeding Interventions To Reduce Child Mortality Rates In Low, Middle-Income Countries: A Systematic Review Of Randomized Controlled Trials, Alexis Engelhart, Stacey Mason, Ucheoma Nwaozuru, Chisom Obiezu-Umeh, Victoria Carter, Thembekile Shato, Titilola Gbaja-Biamila, David Oladele, Juliet Iwelunmor

2020-Current year OA Pubs

Child mortality is the lowest it has ever been, but the burden of death in low- and middle-income countries (LMICs) is still prevalent, and the numbers average above the global mean. Breastfeeding contributes to the reduction of child mortality by improving chance of survival beyond childhood. Therefore, it is essential to examine how evidence-based breastfeeding interventions are being maintained in resource-constrained settings. Guided by Scheirer and Dearing's sustainability framework, the aim of this systematic review was to explore how evidence-based breastfeeding interventions implemented to address child mortality in LMICs are sustained. The literature search included randomized controlled trials (RCTs) of …


Assessing The Sustainability Capacity Of Evidence-Based Programs In Community And Health Settings, Caren Bacon, Sara Malone, Kim Prewitt, Rachel Hackett, Molly Hastings, Sarah Dexter, Douglas A Luke Jan 2022

Assessing The Sustainability Capacity Of Evidence-Based Programs In Community And Health Settings, Caren Bacon, Sara Malone, Kim Prewitt, Rachel Hackett, Molly Hastings, Sarah Dexter, Douglas A Luke

2020-Current year OA Pubs

BACKGROUND: Within many public health settings, there remain large challenges to sustaining evidence-based practices. The Program Sustainability Assessment Tool has been developed and validated to measure sustainability capacity of public health, social service, and educational programs. This paper describes how this tool was utilized between January 2014 and January 2019. We describe characteristics of programs that are associated with increased capacity for sustainability and ultimately describe the utility of the PSAT in sustainability research and practice.

METHODS: The PSAT is comprised of 8 subscales, measuring sustainability capacity in eight distinct conceptual domains. Each subscale is made up of five items, …


A Comparative Study On Out Of Scope Detection For Chest X-Ray Images, Nuttapol Kamolkunasiri Jan 2022

A Comparative Study On Out Of Scope Detection For Chest X-Ray Images, Nuttapol Kamolkunasiri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Image classification models in actual applications may receive input outside the intended data distribution. For crucial applications such as clinical decision-making, it is critical that a model can recognize and describe such out-of-distribution (OOD) inputs. The objective of this study is to investigate the efficacy of several approaches for OOD identification in medical images. We examine three classes of OOD detection methods (Classification models, Confidence-based models, and Generative models) on the data of X-ray images. We found that simple classification methods and HealthyGAN perform the best overall. However, HealthyGAN cannot generalize to unseen scenarios, while classification models still retain some …


Investigate The Possibility Of Using Smart Contracts And Digital Signatures To Create A Legally Binding Contract, And To Create A Prototype Opensource Web Application As A Proof Of Concept, Yosnai Chanatrutipan Jan 2022

Investigate The Possibility Of Using Smart Contracts And Digital Signatures To Create A Legally Binding Contract, And To Create A Prototype Opensource Web Application As A Proof Of Concept, Yosnai Chanatrutipan

Chulalongkorn University Theses and Dissertations (Chula ETD)

We investigated the possibility of using blockchain to create a legally binding contract. According to our study, blockchain can be used to authenticate the identities of the involved parties, to provide a cryptographically generated electronic signature used to sign a contract, and to automate and enforce the term of an agreement. The authentication and the signing are done using a blockchain-based self-sovereign identity framework called a decentralized identity and verifiable credentials. The term can be enforced by using a smart contract, a program that runs on the blockchain. Some contracts terms are too complex to be translated into a smart …


Coastal Hazard Vulnerability Assessment Along The Coast Of Pranburi – Sam Roi Yot, Yrachuap Khiri Khan Province, Somruedee Kawlomlerd Jan 2022

Coastal Hazard Vulnerability Assessment Along The Coast Of Pranburi – Sam Roi Yot, Yrachuap Khiri Khan Province, Somruedee Kawlomlerd

Chulalongkorn University Theses and Dissertations (Chula ETD)

Pranburi - Sam Roi Yot coastal area consists of various coastal landforms such as rocky coasts, beaches, mangroves, and estuaries. These include several important places such as natural resources, tourist attractions, and significant economic areas of the province. In addition, there are a broad range of land use in this region, including agriculture, conservation, residence, hotels, and resorts. However, this coastal area is vulnerable to natural disasters, which can damage the local ecosystem and population. The objective of this study is to assess the physical damage from coastal hazards by using the Coastal Hazard Wheel (CHW) approach and also to …


Academic Management Strategies Of Secondary Schools Based On The Concept Of Intercultural Competence, Muanfan Korattana Jan 2022

Academic Management Strategies Of Secondary Schools Based On The Concept Of Intercultural Competence, Muanfan Korattana

Chulalongkorn University Theses and Dissertations (Chula ETD)

The research objectives were to 1) study conceptual frameworks of academic management of secondary schools and intercultural competence, 2) study students’ intercultural competence levels, 3) analyze strengths, weaknesses, opportunities, and threats (SWOT) of academic management of secondary schools based on the concept of intercultural competence, and 4) develop academic management strategies based on the concept of intercultural competence, using a multiphase mixed-methods design methodology. The study population was 19 schools, with 307 respondents, including school administrators, head teachers, and teachers. Research instruments included questionnaires and evaluation forms. Data analysis included frequencies, percentages, arithmetic mean, standard deviations, modified priority needs index …


A Comparative Study On Artificial Intelligence-Based Methods For Fault Detection, Classification, And Localization In Distribution Lines, Nanda Kumari Jan 2022

A Comparative Study On Artificial Intelligence-Based Methods For Fault Detection, Classification, And Localization In Distribution Lines, Nanda Kumari

Chulalongkorn University Theses and Dissertations (Chula ETD)

In recent years, supervised machine learning (SML) has demonstrated its effectiveness in pattern recognition and outcome prediction within datasets. The objective of this research is to develop an algorithm that utilizes SML classification and regression equation capabilities to accurately classify and locate faults occurring in electricity distribution lines. The proposed algorithm takes the measured values of electrical current and voltage at one end of the distribution line as input data and outputs the type of fault. The algorithm evaluates its performance by simulating the IEEE 14-bus power system using MATLAB and generating various types of faults at different locations and …


Effects Of The Writing Instructional Model With Integration Of Inquiry-Based Learning And Visual Literacy On 21st Century Skills Of Efl Learners, Patsawut Sukserm Jan 2022

Effects Of The Writing Instructional Model With Integration Of Inquiry-Based Learning And Visual Literacy On 21st Century Skills Of Efl Learners, Patsawut Sukserm

Chulalongkorn University Theses and Dissertations (Chula ETD)

Although a body of research illustrates the potential of inquiry-based learning in promoting the 21st century skills among English as a Foreign Language (EFL) students (AbuRezeq, 2018; Imansyan et al., 2019; Milatasari, 2013; Palupi et al., 2020; Tongjean et al., 2019), other studies have indicated its occasional failure in eliciting students’ engagement (Duschl & Wright, 1989; Gill, 2005), which affects students’ success in language learning. This results in the need to leverage other pedagogical strategies, including visual literacy, to increase the efficacy of inquiry-based learning (Gonzalez-Ledo, 2015; Maricimoi, 2017; Navidinia et al., 2018; Rokhaniyah, 2019, Sulastri, 2019; Tayib, 2015; Villasor, …


Effects Of Structural Priming And Lexical Residual Activation On The Acquisition Of The English “Noun + Relative Clause” By L1 Chinese Learners, Xueli Li Jan 2022

Effects Of Structural Priming And Lexical Residual Activation On The Acquisition Of The English “Noun + Relative Clause” By L1 Chinese Learners, Xueli Li

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study investigated L1 Chinese learners’ acquisition of the English “Noun + Relative Clause” based on Structural Priming (SP) (Bock, 1986; Bock, 1989; Bock & Griffin, 2000) and Lexical Residual Activation (LRA) (Cleland, 2003; Levelt et al., 1999). It was hypothesized that, based on SP, when L1 Chinese learners were primed by the English “Noun + Relative Clause”, when the priming and the target structures shared different head nouns, they would produce more “Noun + Relative Clause” than when they were primed by the English “Adj + Noun”, and the priming effect was significant. Also, based on SP and LRA, …


Simulation Study On Co2 Enhanced Oil Recovery For Offshore Area In Thailand, Pariwat Wongsriraksa Jan 2022

Simulation Study On Co2 Enhanced Oil Recovery For Offshore Area In Thailand, Pariwat Wongsriraksa

Chulalongkorn University Theses and Dissertations (Chula ETD)

Fossil fuels are widely used all over the world. It generates carbon dioxide (CO2) which is one of the main causes for climate change and global warming. One practical technology to reduce CO2 emission is carbon capture, utilization, and storage (CCUS) which includes the use of CO2 for enhanced oil recovery (CO2EOR) and storage in the geological reservoir. In Thailand, there are some potential geological reservoirs for CO2EOR due to crude properties, depth of the reservoir and oil saturation, especially in the Gulf of Thailand. However, the high temperatures gradient in the Gulf of Thailand can lead to higher minimum …


Effect Of Salinity Contrast Between Formation Water And Injected Low Salinity Water On Low Salinity Waterflooding In Shaly-Sandstone Formation, Sarun Phuenghansaporn Jan 2022

Effect Of Salinity Contrast Between Formation Water And Injected Low Salinity Water On Low Salinity Waterflooding In Shaly-Sandstone Formation, Sarun Phuenghansaporn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Low salinity waterflooding is an improving oil recovery technique that is highly mentioned nowadays as it is cost-efficient and environmentally friendly. The technique involves injecting water with lower salinity compared to formation salinity to shift the surface equilibrium toward the liberation of oil from the rock surface. Nevertheless, successful of this technique depends on many parameters especially the presence of clays. Several types of clays can be found in oil reservoirs, and they may react to different cations in inject low salinity in different ways, resulting in different magnitudes of oil recovery. Moreover, the contrast of salinity between formation water …


Oral Health Service Of Older Adults In Long-Term Care Facilities, Puntawee Barameepipat Jan 2022

Oral Health Service Of Older Adults In Long-Term Care Facilities, Puntawee Barameepipat

Chulalongkorn University Theses and Dissertations (Chula ETD)

To assess oral health service in long-term care facilities in Bangkok Methods: A cross-sectional study was conducted in 50 licensed long-term care facilities in Bangkok. Informed consent was obtained from all participants before conducting phone interviews and administering the questionnaire. The questionnaire covered various aspects, including demographics, health services, and oral health services provided within the long-term care facilities. Results: The study revealed variations in terms of operational years, service capacity, service expense per month, and provision of health services, including oral health services. It was found that the differences in service expenses impacted the provision of denture care for …


Pore Pressure Prediction Using Combination Drilling Efficiency And Hydro-Mechanical Specific Energy Methods, Munawir Arge Pratama Otolomo Jan 2022

Pore Pressure Prediction Using Combination Drilling Efficiency And Hydro-Mechanical Specific Energy Methods, Munawir Arge Pratama Otolomo

Chulalongkorn University Theses and Dissertations (Chula ETD)

Several methods of pore pressure prediction using drilling parameters were introduced and improved to meet the challenges of accurate prediction at a relatively low cost. Knowledge of pore pressure is essential for safe well planning, cost-effective drilling, and operational decision-making. Conventional methods in pore pressure prediction using drilling parameters have limitations on its application of making the normal compaction trendline that is only applicable in clean shale intervals. In this work, the concept of drilling efficiency (DE) and hydro-mechanical specific energy (HMSE) for predicting formation pore pressure is proposed. This method, termed DE-HMSE, is based on the theory that the …


Life Cycle Assessment Of Canned Fish Production In Thailand, Chanya Kraiwed Jan 2022

Life Cycle Assessment Of Canned Fish Production In Thailand, Chanya Kraiwed

Chulalongkorn University Theses and Dissertations (Chula ETD)

The canned fish industry is one of the world's most popular exports in Thailand. Moreover, the canned seafood industry ranks fourth in terms of energy consumption, which compares to all industry group (Wiriyatangsakul, 2021). Commercial competitiveness, on the other hand, must be improved because of the competitive conditions in the global market. Thus, this study evaluates the environmental performance of a factory in Samut Sakhon, Thailand, using Life Cycle Assessment (LCA) with Gate-to-Gate approach and setting functional unit by 1 ton fresh fish entering to process. The study used the SimaPro LCA application with the CML 2 baseline 2000 method, …


Co-Effects Of Silver Nanoparticles And Microplastics On Nitrifying Microorganisms From Wastewater Treatment Plants And Their Activities, Nampetch Charanaipayuk Jan 2022

Co-Effects Of Silver Nanoparticles And Microplastics On Nitrifying Microorganisms From Wastewater Treatment Plants And Their Activities, Nampetch Charanaipayuk

Chulalongkorn University Theses and Dissertations (Chula ETD)

Silver nanoparticles (AgNPs) and microplastics are emerging water contaminants of the decade. They share a similar fate and transport in wastewater treatment plants as they tend to accumulate in sludge of aeration tanks. Since both contaminants have negative effects on microbial growth, the ammonia-oxidizing microorganisms in the aeration tanks are at risk for inhibition and consequently nitrification process fails. This study investigated the effects of AgNPs and microplastics on ammonia-oxidizing activity and community. No inhibition of ammonia oxidation rate was observed at 0.1 mg/L AgNPs. Partial inhibition was found at 0.5 and 1 mg/L AgNPs, while complete inhibition occurred at …


Analyzing Impact Of Economic Indicators On Vietnam Stock Market With Machine Learning Techniques, Nuttawan Sangsawai Jan 2022

Analyzing Impact Of Economic Indicators On Vietnam Stock Market With Machine Learning Techniques, Nuttawan Sangsawai

Chulalongkorn University Theses and Dissertations (Chula ETD)

The study provides an analysis of the Vietnamese stock market using statistical and machine learning models. The dataset shows that all features have a positive linear relationship with the VN Index, but exhibit different scales and degrees of skewness. The Augmented Dickey-Fuller (ADF) unit root test was conducted to identify whether the variables were stationary or non-stationary, and most variables were transformed into stationary data through first differencing. The OLS method was used to construct a short run model, and the results indicated that only three variables, namely CPI, exchange rate, and S&P500 index, exhibited statistical significance. The ARDL Bound …