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Articles 511 - 540 of 4534
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Novel Psychophysics Of Cognitive Color Appearance Phenomena, Luke Hellwig
Novel Psychophysics Of Cognitive Color Appearance Phenomena, Luke Hellwig
Theses
Color appearance models can be used as an experimental design and analysis tool to better study high-level color perception involving brightness and chromatic adaptation. We investigate the experimental basis for the Helmholtz-Kohlrausch effect, the contribution of chromatic intensity to our perception of brightness. A new experimental method for measuring the brightness of chromatic colors leads to a model of the Helmholtz-Kohlrausch effect, which we use to extend CIECAM16, the color appearance model recommended by the Commission Internationale de l'Eclairage. The model is tested on high-dynamic-range images. The process of building this model also leads to several improvements in CIECAM16 itself. …
Analysis Of Molecular Dynamics Simulations Relevant To Combining Polarized Neutron Scattering With Nuclear Magnetic Resonance, Stella Van Ness
Analysis Of Molecular Dynamics Simulations Relevant To Combining Polarized Neutron Scattering With Nuclear Magnetic Resonance, Stella Van Ness
Theses
The goal of this thesis is to contribute to the study of combining nuclear magnetic resonance (NMR) and neutron scattering to study liquid structure. NMR could be used to polarize select atoms in a target molecule in a neutron scattering system. Molecular dynamics (MD) was used to simulate a system of thienopyridazine dissolved into deuterated methanol. A robust function was constructed to calculate the scattering cross-sections resulting from this system, as they depend on the polarization and spin states of the hyperpolarizable hydrogen atoms. This function can be used in the future to estimate signal-to-noise characteristics of specific experimental designs.
Lifelong Learning In Spiking Neural Networks Through Neural Plasticity, Nicholas Soures
Lifelong Learning In Spiking Neural Networks Through Neural Plasticity, Nicholas Soures
Theses
Lifelong learning, the ability to learn from continually changing data distributions in real-time, is a significant challenge in artificial intelligence. The central issue is that new learning tends to interfere with previously acquired memories, a phenomenon known as catastrophic forgetting. Surrounding this are several other challenges associated with this, such as knowledge transfer and adaptation, few-shot learning, and processing of noisy data. Since humans do not seem to suffer from this problem, researchers have applied biologically inspired techniques to address it, including metaplasticity, synaptic consolidation and memory replay. Although these approaches have seen some success in traditional neural networks, there …
Prediction Of Unplanned 30-Day Readmission Of Heart Failure Patients Using Lstm, Jesdin Raphael
Prediction Of Unplanned 30-Day Readmission Of Heart Failure Patients Using Lstm, Jesdin Raphael
Theses
In the context of heart failure, a leading cause of hospitalization in the United States, approximately 15\% of patients discharged within 30 days face readmission, contributing to escalated healthcare costs and compromised clinical outcomes. This study leverages a wealth of personal information extracted from Emergency Health Records (EHRs) spanning two decades. This research aims to enhance the predictive capabilities of re-hospitalization for cardiac patients by creating a two-stage LSTM model while incorporating features into regression and time series datasets. A critical aspect of this study involves ensuring the integration of all relevant features across both datasets. Including constant data elements, …
Thermo-Kinetic Parameters Governing Decomposition Of Amino Acids: A Computational Study, Mubarak Taleb Alkwradi
Thermo-Kinetic Parameters Governing Decomposition Of Amino Acids: A Computational Study, Mubarak Taleb Alkwradi
Theses
Amino acid model compounds are important nitrogenated species that in various categories of biomass. These compounds exhibit unique fragmentation pathways because of their adjacent amino and hydroxyl groups. Comprehending the decomposition chemistry of amino acids is essential to reduce harmful nitrogen emissions during biomass thermal treatment. This research reports the kinetic and thermodynamic properties of amino acids, and sulfur-containing amino acid, based on accurate density functional theory calculations coupled with kinetic modelling. The first part of the thesis provides comprehensive thermochemical parameters for the complete set of amino acids in the gas phase. The optimized geometries of amino acid compounds …
Selective Production Of Levoglucosan (Lg) From Pyrolysis Of Date Pits And Its Catalytic Transformation Into Transportation Fuels, Ala Hamid Higazi
Selective Production Of Levoglucosan (Lg) From Pyrolysis Of Date Pits And Its Catalytic Transformation Into Transportation Fuels, Ala Hamid Higazi
Theses
Levoglucosan (LG) or (1,6-anhydro-β-D-glucopyranose) signifies important sugar derivatives produces in appreciable quantities from thermochemical and biochemical degradation of biomass. It is often regarded as an important platform chemical for the synthesis of value-added products, most notably styrene and furans. The work in this thesis entails two broad aims; to produce LG from pyrolysis of date pits; and then convert the LG into transportation fuels through a hydrodeoxygenation (HDO) reaction. The particular choice of date pits stems from its local relative abundance as a waste biomass. Aiming to further improve the yield of levoglucosan yields from pyrolysis of date pits, pre-treatment …
Drone Swarms In Adversarial Environment, Bhavana Sai Yadav Akula
Drone Swarms In Adversarial Environment, Bhavana Sai Yadav Akula
Theses
Drones are unmanned aerial vehicles (UAVs) operated remotely with the help of cameras, GPS, and on-device SD cards. These are used for many applications including civilian as well as military. On the other hand, drone swarms are a fleet of drones that work together to achieve a special goal through swarm intelligence approaches. These provide a lot of advantages such as better coverage, accuracy, increased safety, and improved flexibility when compared to a single drone. However, the deployment of such swarms in an adversarial environment poses significant challenges. This work provides an overview of the current state of research on …
The Black Garden, Madalene Klocke
The Black Garden, Madalene Klocke
Theses
“The Black Garden” is a novel-length fantasy fiction work. It follows the narrative of Ryan, an 18-year-old girl, who has great expectations for what her first year at university will hold. Her entire world view is tilted when she attends a party with her new roommate, Blair, and wakes up in an unfamiliar place. Ryan must fight to keep her sanity as she is thrust into the world of faeries, witches, and far worse creatures than she could have ever imagined: including her parents.
Biodov: A Tool Used To Encourage Discovery In Bioinformatics Through Gamification, Gregory D. Johnson Jr.
Biodov: A Tool Used To Encourage Discovery In Bioinformatics Through Gamification, Gregory D. Johnson Jr.
Theses
Expressing big data in a meaningful manner is exceptionally difficult. Scientists often struggle with the visualization of data due to several limitations. Currently, many scientists use two-dimensional figures to display and analyze meaningful data. However, I believe using game design theory and game technologies, we can create more robust visualizations. These visualizations will allow scientists to easily communicate science to the masses and make better discoveries. Therefore, we introduce BioDOV (Biological Data Oriented Visualization). This tool will utilize game design principles to expand upon current visualization methods in the scientific community. Through this proof of concept, we will create the …
Application Of Icp Rie Techniques To Produce Cnt Arrays, Mujtaba Yar Khan Siddiqui
Application Of Icp Rie Techniques To Produce Cnt Arrays, Mujtaba Yar Khan Siddiqui
Theses
Introducing biomolecules into cells is an important process in the field of gene therapy and in developing cures for debilitating illnesses such as HIV and cancer. However, the currently used methods for cellular transfection are slow, inefficient and expensive, causing them to be restrictive. A solution to this problem would be the carbon nanotube (CNT) array devices developed by our research group, which have been shown to be highly efficient at transporting biomolecules into cells. In the current manufacturing process, a sacrificial template with vertically aligned nanopores is used to deposit carbon in, the template then is etched away to …
Biochemical Charactrization Of A Fructosyltransferase Enzyme From A Halophilic Archaeon, Haloarcula Marismotui, For Biotechnological Applications, Ahlam Khalifa Al Ameri
Biochemical Charactrization Of A Fructosyltransferase Enzyme From A Halophilic Archaeon, Haloarcula Marismotui, For Biotechnological Applications, Ahlam Khalifa Al Ameri
Theses
Fructosyltransferase enzymes are involved in the production of fructans, which are polymers of fructose and naturally present in many foods like fruits, vegetables, legumes, and cereals. Fructans with short chain lengths are called Fructooligosaccharides (FOS), which are small dietary fibers having low caloric values and are known as “prebiotics”. Fructans have a broad range of applications in the food, pharmaceutical, cosmetics, and chemical industries. They have unique physiochemical properties and functionalities depending on the source of enzyme used for their production. The present study aimed at the utilization of a recently discovered unique fructosyltransferase enzyme from an extremely halophilic microorganism, …
Use Of Root Endophytic Enterobacter Sp. Sa187 For The Improvement Of Abiotic Stress Tolerance Of Tomatoes Grown Under Greenhouse Conditions, Aysha Mohammad Rahmani
Use Of Root Endophytic Enterobacter Sp. Sa187 For The Improvement Of Abiotic Stress Tolerance Of Tomatoes Grown Under Greenhouse Conditions, Aysha Mohammad Rahmani
Theses
Agricultural productivity is largely affected by climate change. These climatic alterations translate into adverse abiotic stress conditions, such as heat, drought, and salinity, which restrict the geographical distribution of plants and limit their crop yields. Extreme conditions primarily affect semiarid and arid regions, causing severe environmental and economic repercussions. Plant growth-promoting rhizobacteria (PGPR) have been proposed to overcome these challenges. The desert plant endophytic bacterium Enterobacter sp. SA187 has shown beneficial effects on plant growth and salt stress tolerance in the model plant Arabidopsis thaliana in vitro, as well as under field conditions in different crops. This study aimed to …
Evaluation Of Rotenone Mediated Α-Synuclein Spreading And Neurotoxicity In Intra-Striatal Injection Of Α-Synuclein Pff Model Of Parkinson’S Disease, Engila Khan
Theses
In the last 25 years, the prevalence of Parkinson’s Disease (PD) across the globe has doubled. Clinical manifestations of this progressive neurodegenerative disorder include motor symptoms such as tremors, bradykinesia, postural instability, etc., which occur due to selective loss of dopaminergic neurons in the Substantia nigra (SNC) in the brain. The histopathological feature of PD is the presence of intra-neuronal aggregates of proteins called Lewy bodies, a major constituent of which is α-synuclein (α-syn).
Epidemiological studies to date have reported a connection between exposure to environmental neurotoxins such as Rotenone (a mitochondrial complex 1 inhibitor) and increased risk of PD …
Population Structure And Genetic Diversity Of The Socotra Cormorant (Phalacrocorax Nigrogularis), Noura Mabkhout Almansoori
Population Structure And Genetic Diversity Of The Socotra Cormorant (Phalacrocorax Nigrogularis), Noura Mabkhout Almansoori
Theses
The Socotra cormorants (Phalacrocorax nigrogularis) are regional endemic seabirds restricted to the Arabian Gulf, Gulf of Oman, and the Arabian Sea. This species is classified as vulnerable by the IUCN Red List. However, no population genetic study has been conducted on P. nigrogularis in their range, and population structure, gene flow and connectivity between colonies is unknown. Likewise, genetic diversity of this species has not yet been characterized. Thus, the aim of this thesis was to fill these gaps by inferring population structure, assessing gene flow and genetic diversity of Socotra cormorant colonies in their known distribution range. …
The Association Between Total And Types Of Dietary Protein Intake And Prevelence Of Impaired Fasting Glucose And Type 2 Diabetes, Afra Salah Alsammach
The Association Between Total And Types Of Dietary Protein Intake And Prevelence Of Impaired Fasting Glucose And Type 2 Diabetes, Afra Salah Alsammach
Theses
People with impaired fasting glucose (IFG) and type 2 diabetes (T2D) need to modify their dietary composition. This could assist in the management and prevention of the disease. However, the role played by the composition of specific dietary macronutrients on the risk of IFG & T2D needs further research. This study sought to examine the association between total and type of dietary protein (animal and plant) consumption with prevalence of T2D and IFG. Aims: To investigate the association between total intake and types (animal vs plant) of dietary protein intake and prevalence of IFG & T2D in adults. Data …
Modulation Of Chronic Allergic Contact Dermatitis Through B Cells, Sara Saeed Alhmoudi
Modulation Of Chronic Allergic Contact Dermatitis Through B Cells, Sara Saeed Alhmoudi
Theses
Allergic contact dermatitis (ACD) is a common inflammatory disease caused by contact with an allergen and is a T-cell-mediated type IV hypersensitivity reaction. Shortchain fatty acids (SCFAs) showed the ability to modulate immune cells in case of inflammation. Pentanoate is one of the abundant SCFA that showed therapeutic ability by inducing interleukin-10 (IL-10) secretion in lymphocytes. IL-10-producing regulatory B cells have been shown to decrease different inflammatory responses; however, the overall role of B cells in ACD is not well studied. This project aims to explore the role of B cells during chronic ACD and their modulation with the SCFA …
Modification Of Cellulose Fibers By Acyl Grafting For Oil Spill Remediation, Fatima Saif Alhumaidi
Modification Of Cellulose Fibers By Acyl Grafting For Oil Spill Remediation, Fatima Saif Alhumaidi
Theses
Oil spills represent a significant source of aquatic pollution with substantial repercussions on the environment as well as the economic and societal well-being of coastal communities. This research project is focused on the utilization of chemically modified cellulose-based fibers to remediate oil-contaminated water. The hydroxyl groups present in cellulose were acetylated under optimized conditions, thereby rendering the fibers hydrophobic and enhancing their affinity for crude oil. The modified cellulosic material was characterized by several physical and chemical techniques (IR, TGA, contact angle measurement, SEM, and back titration) to determine the extent of acylation and assess their morphological properties. The derivatized …
Development Of Popcorn Thermal Insulation Panels, Yonis Hussein Mohamud
Development Of Popcorn Thermal Insulation Panels, Yonis Hussein Mohamud
Theses
The research and development of sustainable and renewable materials that can take the place of conventional plastics derived from petroleum has attracted increasing attention in recent years. Polylactic acid (PLA) and Polyhydroxy butyrate (PHB) are viable alternatives biopolymers due to their biodegradability. Also, the enhancement of material properties can be achieved through the incorporation of fillers. In this study, the utilization of popcorn in developing of insulation materials has been employed in two distinct methodologies. The first involves the coating of popcorn with varying percentages of PLA using the solvent casting method, while the second involves the integration of popcorn …
Anti Cancer Activity Of Rhus Coriaria (Sumac) Against 5-Fluorouracil-Resistant Colorectal Cancer Cells, Zohra Nausheen Nizami
Anti Cancer Activity Of Rhus Coriaria (Sumac) Against 5-Fluorouracil-Resistant Colorectal Cancer Cells, Zohra Nausheen Nizami
Theses
Colorectal cancer (CRC) is the second leading cause of cancer-related deaths, both worldwide and in the UAE. 5-Fluorouracil (5-FU), a pyrimidine analogue, is a chemotherapeutic agent that is an integral component of chemotherapy regimens for CRC treatment. However, 5-FU resistance (intrinsic and/or acquired) inhibits their clinical efficacy. In recent years, there has been a growing popularity for plant-based cancer therapeutics, specifically using phytochemical compounds. Rhus coriaria (Sumac) is a Mediterranean plant whose fruits are used as a spice and medicinal herb. Extracts of Rhus coriaria fruits (RCE) have been reported to exhibit anti-cancer activity against breast cancer and CRC. In …
An Examination Of The Association Between Sleep Quality And Psychological Distress Among University Students In The Middle East: A Cross-Sectional Correlational Study, Ayesha Saeed Alsuwaidi
An Examination Of The Association Between Sleep Quality And Psychological Distress Among University Students In The Middle East: A Cross-Sectional Correlational Study, Ayesha Saeed Alsuwaidi
Theses
Literature reviews have revealed that there are limited studies on sleep quality in the United Arab Emirates (UAE) and that few studies are available in the Middle Eastern region. The objective of this study was to examine the association between sleep quality and psychological distress among university students in the Middle East. A correlational cross-sectional design was determined, and a self-administered online questionnaire was used. The electronic survey was circulated amongst students on campus and received 435 responses from three universities namely, Menoufia University in Egypt, Sultan Qaboos University in the Sultanate of Oman, and United Arab Emirates University in …
Canagliflozin Ameliorates Autistic-Like Features And Mitigates Brain Oxidative Stress Levels In Valproic Acid-Induced Autism In Rats, Mohammad Moutaz Nakhal
Canagliflozin Ameliorates Autistic-Like Features And Mitigates Brain Oxidative Stress Levels In Valproic Acid-Induced Autism In Rats, Mohammad Moutaz Nakhal
Theses
Autism spectrum disorder (ASD) is a neurodevelopmental disease with a substantially increasing incidence rate. It is mainly characterized by repetitive behavior, intellectual difficulties, social communication and interactions deficits. Many medications, dietary supplements, and behavioral treatments have been recommended for ASD management, however, there is no cure yet. Recent studies have examined the therapeutic potential of the sodium-glucose cotransporter 2 (SGLT2) inhibitors in neurodevelopmental diseases, based on their proved anti-inflammatory and antioxidant effects. The main objective of this study is to assess the ability of canagliflozin in improving the behavioural characteristics of autistic rats and investigate the efficacy of canagliflozin in …
Maladaptive Daydreaming And Social Anxiety: Prevalence And The Mediating Role Of Emotional Regulation, Riffa Fathima Abuthahir
Maladaptive Daydreaming And Social Anxiety: Prevalence And The Mediating Role Of Emotional Regulation, Riffa Fathima Abuthahir
Theses
Previous studies have generated mixed evidence regarding the magnitude of the prevalence of Maladaptive Daydreaming (MD). In addition, although previous studies have identified an association between Maladaptive Daydreaming (MD) and Social Anxiety (SA), literature is sparse in exploring the underlying factors such as emotional regulation difficulties that might mediate this relationship. The current study attempted to investigate the prevalence of MD and self-perceived levels of Social Anxiety (SA) among undergraduate students in the United Arab Emirates (UAE). It also attempted to explore whether difficulties in regulating emotions mediate the relationship between MD and self-perceived levels SA. A cross-sectional design with …
Selection Of Natural Surfactants For Possible Use In Improving Oil Recovery Of Carbonate Oil Reservoirs, Hiba Hachem Limam
Selection Of Natural Surfactants For Possible Use In Improving Oil Recovery Of Carbonate Oil Reservoirs, Hiba Hachem Limam
Theses
Middle East petroleum industry is currently searching for the most suitable enhanced oil technique to improve the oil recovery from local oil reservoirs. The biggest challenge for the application of enhanced oil recovery (EOR) in the Middle East is the harsh environment (high salinity and temperature). Surfactant (synthetic or natural) is one of the EOR major players considered for application in the Middle East. However, synthetic surfactants have several drawbacks, such as economically unattractive and environmental impacts. This study investigated the possible use of natural surfactant extracted from the leaves of three types of plants, namely Aloe Vera, Tetraena qatarensis, …
Association Of Human Leukocyte Antigen (Hla) Alleles With Atopic Dermatitis In The Uae Population, Suhib Ziad Abu Jwayed
Association Of Human Leukocyte Antigen (Hla) Alleles With Atopic Dermatitis In The Uae Population, Suhib Ziad Abu Jwayed
Theses
In the face of the increasing global prevalence of Atopic Dermatitis (AD), a chronic inflammatory skin condition, this thesis seeks to elucidate the genetic underpinnings of AD within the UAE population. Previous literature has underscored the ethnic-specific involvement of Human Leukocytes Antigen (HLA) genetic variations, especially within HLA-A and HLA-DRB1 genes, in the pathogenesis of various skin diseases, including AD. Leveraging this knowledge, our research specifically aimed to investigate the association between these HLA variants and AD in the UAE. Utilizing a comparative approach, the frequencies of HLA-A and HLA-DRB1 variants were assessed in AD patients vis-à-vis a control group. …
Self-Assembling Peptide-Based High-Relaxivity Prostate-Cancer-Targeted Mri Contrast Agents, Andrew O'Brien
Self-Assembling Peptide-Based High-Relaxivity Prostate-Cancer-Targeted Mri Contrast Agents, Andrew O'Brien
Theses
Magnetic Resonance Imaging (MRI) is a widely used, highly effective imaging method for diagnosing cancer and guiding treatment. MRI contrast agents enhance image quality, with higher relaxivity (r1) contrast agents providing the best utility. Attaching a cancer-specific-targeting group enhances the image further. Therefore, a high-relaxivity cancer-targeted contrast agent is a highly desirable tool for diagnosis and treatment. Our group previously synthesized a peptide-based MRI contrast agent with the Ala(Gd-DO3A) chelator that targeted the prostate cancer biomarker PSMA using the small-molecule ligand DCL. While this agent displayed nominal relaxivity, it was serendipitously found that the relaxivity of a synthetic intermediate containing …
Analysis Of Cycle 2 Science Textbooks For Representation Of Elements Contributing To Quality Science Textbooks As Learning Resources, Sohani Mehzabin Prova
Analysis Of Cycle 2 Science Textbooks For Representation Of Elements Contributing To Quality Science Textbooks As Learning Resources, Sohani Mehzabin Prova
Theses
Science textbooks are a valuable resource for both students and teachers. They hold a significant role in students' learning of science. Most science teachers in the United Arab Emirates (UAE) rely on science textbooks as the foundation for their teaching. However, until now, limited research has been conducted to assess the appropriateness of science textbooks prescribed by the Ministry of Education in the UAE. Therefore, this study aims to evaluate the representation of elements contributing to the suitability of cycle 2 (grades 5 to 8) science textbooks as learning resources as prescribed by the Ministry of Education of the UAE. …
Examining The Parallel Mediating Effect Of Emotion Dysregulation And Eating Beliefs In The Association Between Low Self¬-Esteem And Binge Eating Behaviours, Farah Al Mohammed
Examining The Parallel Mediating Effect Of Emotion Dysregulation And Eating Beliefs In The Association Between Low Self¬-Esteem And Binge Eating Behaviours, Farah Al Mohammed
Theses
Research in the United Arab Emirates (UAE) around the causes and non-pharmacological treatment options of binge eating behaviours and other eating disorders is limited. Moreover, given the documented increase in binge eating behaviours which, in turn, is associated with two additional eating disorders (i.e., binge eating disorder and bulimia nervosa), there is an urgent need to understand the factors that are implicated in the causation and maintenance of binge eating behaviours in the UAE. A comprehensive understanding of these factors will assist psychotherapists and other mental health professionals in tailoring the interventions that they provide in the treatment and management …
Ai Application In Architecture In Uae: Developing And Testing Advanced Optimization Model For A Parametric Shading Structure As A Retrofit Strategy Of A Midrise Residential Building Façade In Downtown Abu Dhabi, Anwar Ghaleb Ahmad
Theses
Artificial intelligence is a phenomenon that influences every aspect of our lives. AI applications have already started to change the methods in different disciplines. Architecture is one of the disciplines that is highly affected by the developments of AI technologies. With the United Arab Emirates heading to employ new technology to lead the country and region development, it is important to explore and develop the application of AI in the strategic disciplines of the country in which the built environment is essential. This study aimed to develop and evaluate an advanced model script (to be used as a tool) using …
Redshift Wrangler: Conducting A Citizen Science Study Of Extragalactic Spectroscopy, Sadie C. Coffin
Redshift Wrangler: Conducting A Citizen Science Study Of Extragalactic Spectroscopy, Sadie C. Coffin
Theses
I present the citizen science project Redshift Wrangler, designed to use the contributions of volunteers to analyze large samples of galaxy data and build a repository of spectroscopic measurements for various analyses. When we know how to read it, the spectrum of a galaxy can tell the story of its stellar population, distance, and interactions with any close companion galaxies. Through Redshift Wrangler, citizen science measurements become our main tool for extracting information from enormous quantities of collected spectra. Several main goals motivate this work: first, designing and launching Redshift Wrangler on citizen science platform Zooniverse to bring more people …
The Development Of A One-Shot Learning Machine Learning For Industrial Use With Predictive Maintenance, Conor O Brien
The Development Of A One-Shot Learning Machine Learning For Industrial Use With Predictive Maintenance, Conor O Brien
Theses
With the advent of Industry 4.0, Manufacturing operations have become more connected and automated. Modern industrial monitoring technology can monitor the performance of both the sensor utilised and the material under monitoring. This has led to a trend where legacy machines without this technology are being removed from production and/or not included in new reconfigurations of production lines, well before their productive lifespan had ended. A key driver for this is the difficulty in retrofitting Predictive Maintenance (PdM) systems to legacy machines, in part due to the machine-to-machine variation present in older machines. Accounting for this variation in PdM systems …