Digital Commons Network^™

Design And Implementation Of Attitude Control System For Gnssas 6u Cubesat, Anoud Nasser Alkatheeri

Theses

This thesis presents the design and simulation of the Attitude Control System (ACS) for the GNSSaS 6U CubeSat, developed by the National Space Science and Technology Center (NSSTC) at UAE University. The CubeSat's mission is to enhance GNSS signal accuracy, which requires precise attitude control to achieve this objective. The ACS utilizes magnetorquers and reaction wheels for actuation. The primary objective of this thesis is to design an ACS that fulfills the mission’s performance requirements, including maintaining pointing accuracy in both fine and medium pointing modes. To achieve this, a comprehensive disturbance analysis was conducted, leading to the selection of …

تأثير الرضا الوظيفي على استمرار الموظفين الإماراتيين في العمل في القطاع الخاص, وضحه سعيد القايدي

Theses

The Impact of Job Satisfaction on the Continuation of Emirati Employees to Work in the Private Sector

Despite the significant attention given by the government of the United Arab Emirates to the localization n of national talent in the private sector through its support for various government programs and initiatives aimed at enhancing the participation of Emiratis in the labor market across different economic sectors, and the notable success of these programs and initiatives, which have contributed to an increase in the number of Emiratis joining the private sector to nearly 100,000, the most prominent challenge that may affect the …

Assessing The Spatiotemporal Variability Of Aerosol Optical Depth And Particle Sizes In The Uae Atmosphere Using Remotely Sensed Data, Bashayer Ali Alzahmi

Theses

This thesis investigates atmospheric aerosol concentrations, with a particular focus on the United Arab Emirates (UAE). The study maps the spatial and temporal variations in Aerosol Optical Depth (AOD) and characterizes aerosols using high-resolution Moderate Resolution Imaging Spectroradiometer (MODIS) products. The primary objective of this research is to enhance the understanding of aerosol dynamics in the UAE by distinguishing between natural and anthropogenic aerosols through the Angström Exponent (AE) and assessing their impacts on local climate, air quality, and public health. The study employs Remote Sensing (RS) techniques to conduct detailed environmental assessments, analyzing AOD variability across daily, monthly, seasonal, …

Effect Of Virtual Reality Technology On Computer Science/Engineering Based Laboratories Education – A Case Study, Mariam A. Al Nuaimi

Theses

Virtual reality (VR) is becoming increasingly popular and essential in education as institutions strive to incorporate technology in education. In Engineering and Computer Science, students face difficulties in comprehending many abstract complex concepts that are typically studied in Labs. This situation worsens with hardware failure and the lack of pedagogical tools. The main goal of this paper is to investigate the impact of VR environments on learning advanced and complex STEM concepts. We also explore the impact of different human-computer interaction (HCI) techniques including gamification on the learning experience of STEM students. To measure such impact, we developed a VR …

Corrosion Behavior Of 304 Stainless Steel In H2so4/Nacl In The Absence And Presence Of Molybdate And Tungstate, Asma Yousef Alkaabi

Theses

In this study, the corrosion behavior of 304 austenitic stainless steel was investigated in H₂SO₄ solutions, H₂SO₄ as a function of Cl^- ions concentration, H₂SO₄ as a function of MoO4^2- ions concentration, and H₂SO₄ + Cl^- ions as a function of MoO₄^2- ions concentration. Moreover, the synergistic inhibition of MoO4^2- and WO₄^2- ions was investigated in 0.1 M H₂SO₄, with the solution pH adjusted to 3.0. The findings show that the corrosion current density (i …

Polyphenol Profiling And Bioactivities Of Date Seed: A Comparative Assessment Of Extraction Techniques In Different Date Seed Varieties, Fatima Ibrahim Albedwawi

Theses

Plant-waste-derived bioactive compounds have generated growing interest recently. In this context, this project examined the phenolic content, antioxidant capacity, antimicrobial activity, and antibiofilm capability of the seed extract of Phoenix dactylifera. Six date seed varieties (Fardh, Sukarri, Negal, Majdool, Zahidi, and Khadrawy) were studied. In this study, a novel ultrasound-assisted extraction technique is compared with the conventional extraction method (maceration using 80% ethanol), taking into account both the quality and quantity of polyphenols. Among the primary objectives, the ultrasound-assisted extraction (UAE) of polyphenols was optimized using response surface methodology (RSM), aiming for maximum TPC and DPPH radical scavenging. By …

Assessment Of Heavy Metal Concentration In Orange-Spotted Trevally (Flavocaranx Bajad) From Two Coastal Locations In Abu Dhabi, United Arab Emirates, Kholood Khaled Aljaberi

Theses

This study investigates concentration of heavy metals in the Orange-spotted Trevally (Flavocaranx bajad) from two distinct coastal areas in Abu Dhabi Emirate, Sila and Abu Dhabi. Heavy metals pollution poses a significant risk to both marine ecosystems and human health; thus it is vital to conduct comprehensive assessments of heavy metal contaminations in aquatic life. The main aim of this study is to quantify the levels of heavy metals and assess their concentrations in gill, muscle, and liver tissues of the Orange-spotted Trevally from both sites. The samples were prepared and analyzed using microwave digestion system and ICP …

دور الاجتهاد القضائي في تطوير القانون الإداري في دولة الإمارات العربية المتحد ة, Amal Saeed Al Nakhebi

Theses

Administrative judicial diligence, administrative law, administrative judge, legal principles, development of administrative law, administrative disputes

The general rule is that the judge is obligated to adjudicate any dispute brought before him, so he must search for a solution within the folds of legislative texts, and then other sources of the legal rule, and the texts may not help the judge while looking at the cases before him, but he cannot refrain from ruling on the pretext of the absence of a text that can be applied to the case brought before him, so it was necessary for the judge to …

Unital Kadison-Schwarz Type Of Maps, Hajir Khalid Al Zadjali

Theses

Quantum entanglement is an important phenomenon in quantum information theory; its uses range from quantum teleportation and quantum cryptography to solving classical communication problems. One of the issues concerning entanglement is the classification of mixed states into separable states. Positive maps define affine mappings between sets of states of C∗algebras, and have been used to develop a separability criterion for quantum states. Completely positive maps are insensitive to entanglement detection, a weaker notion of positivity is thus needed to detect them. This condition that is stronger than positivity but weaker than complete positivity is given by the Kadison-Schwarz (KS) inequality. …

Solvent- And Temperature-Controlled Regioselective Catalytic Synthesis Of Potentially Bioactive, Sara Helmy Saada

Theses

Isothiocyanates play a crucial role as essential components in the development of effective synthetic methods for producing key chemical intermediates and biologically active molecules. Similarly, N-arylcyanothioformamide compounds have been employed to create structural cores for numerous heterocycles in a one-step reaction. In this study, we describe the first consistent regiospecific reaction of isothiocyanates with a variety of substituted N-arylcyanothioformamides in a 1:1 molar ratio to generate a series of imidazolidineiminodithiones decorated with a multitude of functional groups on both aromatic rings. The reaction is carried out at room temperature using a 20 mol% catalytic amount of triethylamine with …

Utility Of New Remote Sensing Data In Evaluating The Hydrological Response To Land Use And Land Cover Changes, Chithrika Jayamini Alawathugoda

Theses

Land use and land-cover (LULC) changes have profound impacts on hydrological responses, influencing runoff dynamics and flood risks. This study focused on two contrasting watersheds undergoing rapid LULC transformations: the arid Wadi Ham watershed in the UAE and the tropical Imphal watershed in India. The research emphasized the critical role of accurate LULC data for hydrological modeling in climate-sensitive regions, where land-use changes are accelerating. Using high-resolution PlanetScope and Sentinel-2 satellite imagery, LULC maps were developed and classified using Maximum Likelihood (ML) and Random Forest (RF) algorithms. PlanetScope imagery paired with the RF classifier achieved the highest overall accuracy, with …

Automating Modular Construction Manufacturing For Affordable Housing, Enaam Mohammed Ouda

Theses

In recent years, there has been an increase in the frequency and intensity of natural disasters worldwide, resulting in loss of life, displacement, and extensive property damage. According to the UNHCR's report, 122.6 million individuals were displaced by mid-2024, highlighting that the speed and volume of displacement exceeds the availability of solutions for those affected. To address the urgent need for affordable housing solutions, modular construction is preferred over traditional construction methods as it tackles limitations such as long project durations, high costs, and safety and environmental concerns. Integrating advanced technologies in modular construction can further enhance its benefits and …

Food Neophobia, Food Pickiness, And Physical Growth Status In A Sample Of Emirati Children With Neurodevelopmental Disorders And Neurotypical Development In The United Arab Emirates, Hessa Salem Al Derei

Theses

Eating habits and expression of independence in food selection typically starts at about 18 months of age, reaching its peak between 2 and 6 years. However, child feeding problems are common in boys and girls, both- in children with neuro-typical development (NTD) and those with neuro-development disorders (NDDs). Food Neophobia (FN) and Food Pickiness (FP) are considered as the main forms of food rejection in children, affecting their diet variety, and consumption of foods. If unresolved, these may result in nutrient deficiencies and compromised growth and development in children. There is a dearth of evidence on this important topic in …

Effect Of Virtual Reality Technology On Computer Science/Engineering Based Laboratories Education – A Case Study, Saeed Salem Al Shebli

Theses

The rapid growth in mobile applications raises critical concerns about the security of apps and users' privacy, especially in permission control. Mobile apps access sensitive information of users, and the current cybersecurity landscape faces a huge challenge in ensuring the least required permissions are granted. This research focuses on designing an advanced permission recommendation system that couples the strengths of Natural Language Processing (NLP) and Machine Learning (ML) in solving most of the existing gaps in permission management, thus guiding which permissions are mostly needed by Android applications.

The research thus follows a multi-classification approach, integrating state-of-the-art ML techniques with …

Governance Of Religious Affairs In The United Arab Emirates, Ayesha Helal Al Qubaisi

Theses

This study seeks to investigate policies, measures and efforts on religious affairs governance in the UAE, through enacting laws and establishing local religious institutions by uncovering the necessity of the procedures that are in place, the goals of religious governance, how religious affairs are regulated, and the challenges that the government faces in the process. The main objective of this thesis is to provide one possible adoption model for religious regulation. Further, since there are few studies on the topic of religious governance in general, and in the UAE particularly, the researchers synthesized and integrated existing knowledge from diverse sources …

A Secure And Effective Framework For Key Concept Mining From Educational Content Using Large Language Models, Ashika Sameem Abdul Rasheed

Theses

This thesis examines the use of Large Language Models (LLMs) in education, with a focus on improving performance and implementing strong security measures. The research has two main goals, namely, the development of an effective lecture summarization technique using LLMs and identifying and addressing security vulnerabilities in LLM applications according to OWASP (Open Web Application Security Project) guidelines. For the former goal, we have proposed an effective framework for fine-tuning LLMs using real lecture datasets and compared the performance of different LLMs. For the latter goal, we conducted a thorough review of the application dataflow of the proposed framework and …

Cultivation Of Food And Fodder Crop Millets And Quinoa In The Aquaponics System For Sustainable Food Security In The United Arab Emirates, Salama Yousef Al Khoori

Theses

Aquaponics is a sustainable food production technology that integrates aquaculture with hydroponics. This study aimed to evaluate the possible impact of an aquaponics system on the cultivation of pearl millet, finger millet, and quinoa, utilizing water from tilapia aquaculture. The duration of the experiment is six months utilizing the manually constructed backyard aquaponics system. Tilapia fish serves as the principal biological material for nutrient generation in the experiment. This study investigated and recorded water quality indicators, including pH, temperature, dissolved oxygen, electrical conductivity, total dissolved solids, ammonia, nitrite, and nitrate levels over the experimental period. The parameters of fish growth, …

الحماية الجنائية للمستهلك من الغش التجاري والاعلانات المضللة في ضوء التشريع الاماراتي, مريم سليم الجنيبي

Theses

Criminal Protection for The Consumer from Commercial Fraud and Misleading Advertisements in Light of UAE Legislation

In this study, we addressed the topic of criminal protection of the consumer from commercial fraud and misleading advertisements in light of the UAE legislation. We concluded that criminal protection of the consumer from commercial fraud and misleading advertisements is considered one of the important matters that aim to protect the rights of consumers and ensure their safety and security while dealing with various products and services. Criminal protection is one of the basics of consumer protection, as it aims to provide legal penalties …

الرقابة القضائية على قرار إنهاء خدمة الموظف العام على ضوء القضاء الإماراتي, طارق محمد راشد

Theses

Judicial Oversight of the Decision to Terminate A Public Employee's Service Based on the UAE Judiciary

The examination dealt with judicial oversight of administrative decisions issued to terminate the staff member's service as a safeguard established by the staff member against the abuse of his or her right. The supervision examined the legality of the administrative decision issued to terminate the staff member's service formally and objectively, and the penalty for violation of the principle of lawfulness, namely, invalidity and judicial annulment. The research also dealt with the jurisprudence and the judiciary's views on the limits of the judge and …

Kinetics, Thermodynamics, And Biological Characterizations Of Hydrolysates Enzymatically Produced From Proteins Extracted From Microalgae, Hebah Al-Amodi

Theses

This thesis aims to explore the use of Zeolitic Imidazolate Framework-L (ZIF-L) as a support for immobilizing alcalase and its potency in producing protein hydrolysates. ZIF-L was synthesized at room temperature using an aqueous solution, and alcalase was immobilized through adsorption batch experiment. The successful immobilization of alcalase on ZIF-L was confirmed through Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The maximum adsorption capacity of alcalase on ZIF-L was determined to be 672.1 ± 5.5 mg g^-1 at 40°C using an initial protein concentration of 5 mg mL-1. Adsorption equilibrium data …

Developing Policies For Digital Twin Data Quality And Security Controls, Ahmad Abdelbaset Hassan

Theses

This thesis is concerned with the data quality and security of the digital twin and how it is going to impact its adoption, trustworthiness, and potential for real-world applications. By addressing the potential vulnerabilities and ensuring the integrity of data, this research aims to contribute to the development of robust and trustworthy digital twin policies that to complement the existing international standards across different domains. Moreover, it underscores the important need to establish robust policies to ensure the successful and secure deployment of digital twins across industries. Previous research, while valuable, may not have fully addressed the critical interplay between …

Exclusion Tests For Approximating All Solutions Of Nonlinear Equations, Yasmeen Omar Hamida

Theses

The exclusion test is a mathematical technique used to isolate and approximate the solutions of nonlinear equations within a specified interval. This thesis aims to construct a new test leveraging the principles of the exclusion test to achieve faster convergence to the zeros of any given interval within a compact domain. By selecting an alternative objective function and employing nonlinear equations, the proposed method significantly reduces the number of subintervals required for accurate approximation. The key finding of this research is the development of a more efficient algorithm that enhances the speed of convergence. The implications of these findings are …

On Fractional Dunkl-Type Laplacian, Saba Ibrahim Aldan

Theses

This thesis presents a comprehensive study of the fractional Dunkl-type Laplacian operator (−∥x∥ Δ��)^σ for 0<σ<1, through four equivalent key characterizations: the heat semigroup characterization, the pointwise characterization, the spherical mean characterization, and through an extension theorem. These characterizations offer different perspectives on the operator ∥x∥Δ_��, generalizing known results for the Euclidean Laplace operator by incorporating reflection symmetries, making it highly relevant in the harmonic analysis of root systems.

By exploring these characterizations, the thesis highlights the deep connections between the fractional operator (−∥x∥Δ_��)^σ and harmonic analysis, as well as its broader applicability in mathematical physics and partial differential equations.

Practices And Perceptions Of Uae Residents: Food Safety In Handling And Preparation Of Fish, Consumption, And Nutrition From Fish, Noof Ahmad Al Marzooqi

Theses

Background: UAE is uniquely located with an extensive seafront, which has led to the development of fishing and fisheries in the country. As a result, the UAE's diverse population has become one of the highest fish consumers among the Gulf countries. The high fish consumption in the UAE was a part of the traditional diet; however, a better understanding of UAE residents' practices and perceptions of fish food safety, fish preparation, and nutrition from fish consumption was needed. Objective: This study investigates food safety practices in handling and preparation of fish, consumption trends, and perceptions of nutrition from fish among …

جريمة هتك العرض في القانون الإماراتي, سالم علي الكعبي

Theses

The Crime of Indecent Assault in UAE Law

The crime of indecent assault is considered one of the serious offenses condemned by UAE law due to its violation of human dignity and ethical and social values. This research focuses on the evolution of legal texts related to this crime, particularly the changes introduced in Federal Decree-Law No. 31 of 2021 concerning crimes and punishments, compared to the UAE Penal Code of 1987. The research also addresses the amendments made to the rules governing this crime, such as raising the age of the victim from 14 to 18 years and abolishing …

Predicting The Current Habitat Distribution Of Important Halophytes And Their Potential Future Shifts Under Climate Change Using Species Distribution Modeling, Ahlam Mabkhot Bin Suwaidan

Theses

This thesis is concerned with the current habitat distribution of important 15 halophyte species and the impact climate change on their distribution, probability of occurrence and presence for two future temporal points (2050, 2070). The main objective of this thesis is to define the current distribution of important halophytes and to assess the impacts of climate change on their distribution using future climate projections CMIP5 RCP 8.5. This study utilizes multidimensional available data to address the current and to predict the future distribution of Halophyte plant species. To perform this study, the object-oriented and reproducible R package known as SDM, …

The Mediational Role Of Religiosity In The Relationship Between Emotional Regulation And Relationship Satisfaction In Uae And Turkey: A Cross-Sectional Study, Beril Berksu

Theses

Marriage and romantic relationships are significant turning points in personal and social development, contributing to overall well-being and health. In romantic relationship studies, relationship satisfaction is one of the most researched aspects and is affected by various variables, which are gender, relationship duration, and other factors. Among these, religiosity and emotional regulation have been proposed as important aspects as well. However, there is still a gap in the literature to understand how these aspects are connected in non-Western countries like Turkey and the UAE regarding cultural differences. The study aims to explore the mediating role of religiosity in the relationship …

Comparison The Impact Of Co2 And Uvb On Moringa Peregrina And Moringa Oleifera Growth Under Open Top Chamber, Omar Mohammed Alshehhi

Theses

Climate change has had a tremendous impact on ecosystems, with an apparent connection between farming methods and environmental change. Climate change has a substantial effect on both abiotic and biotic factors that affect crop plants. The increasing number of abiotic stressors has highlighted the impact of global warming on plant productivity. This study compared and evaluated the abiotic stress resistance of two Moringa species (Moringa oleifera and Moringa peregrina) to UV radiation, increased CO₂ levels, and their combined effects. The evaluation mainly focused on key morphological features, including plant height (cm) and fresh and dry weights, to assess …

Evaluating The Feasibility And Efficacy Of 3d Printing Versus Traditional Construction Techniques: A Study Of Cost, Time And Energy Of A New Lowrise Office Building On The Uaeu Campus, Hala Mohammed Basel

Theses

In line with the forward-looking vision of the United Arab Emirates University (UAEU), this research evaluates the feasibility and effectiveness of 3D printing technology compared to traditional construction methods, focusing on cost, time, and energy efficiency for a new low-rise office building on the UAEU campus. With the growing number of PhD students in the Architectural Engineering Department, expanding office space has become a priority. This study explores how 3D printing technology, known for its sustainability, reduced material waste, and accelerated construction, can address these challenges more efficiently than conventional methods.

Guided by the UAE Vision 2030, which focuses on …

Evaluation Of Opportunities For The Cultivation Of Heterotrophic Plant Root Organ Cultures As Food: Optimization Of Culture Conditions And Carbohydrate Sources, Fatima Mohammed Alkaabi

Theses

All agricultural plant production requires investment of water, energy, and land, especially in the Gulf Region, where environmental conditions are not ideally suitable for crop farming. Currently, less than 40% of agricultural plant biomass production constitutes food, which greatly limits the overall feasibility of food production systems worldwide. Crop residues constitute over half of global agricultural biomass, and food waste and biomass from public parks and gardens further add to the vast pool of non-edible plant material. Existing valorization strategies for such material cannot compensate for the enormous amounts of water, energy, land, and human resources invested in their production. …