College of Arts & Sciences: Recent submissions
Now showing items 161-180 of 315
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Controlled Fabrication of Efficient Porous Multifunctional Nanocatalysts for The Gas Conversion Reactions to Usable Fuels: A Closer Step for Commercialization
(2020 , Master Thesis)Carbon-based (CNs) nanostructures attracted great attention in various conversion energy technologies, owing to their unique"physicochemical properties such as high surface area, abundant active sites, and stability. Herein, ... -
Enhancing the Thermoelectric Properties of N-type Bismuth-Telluride-Based Alloys Using Graphene As A Nanofiller
(2020 , Master Thesis)Bismuth telluride chalcogenides are the ideal thermoelectric materials used for near room temperature applications. However, the usage of these materials is relegated to a few applications as a result of the extremely low ... -
Variability in Genomic Patterns of Bacterial Communities Related to Tarmats and Quantification of Hydrocarbon Present in the Tarmats Deposited along the Qatar Coast
(2020 , Master Thesis)Qatar has undergone a rapid transition from a fishing and small agriculture to an economy focused on oil and gas since 1960. Owing to the comparatively large level of oil and gas production, the region has become severely ... -
The Influence of Carbon Nanotubes on the Thermoelectric Properties of Bismuth Telluride
(2020 , Professional Masters Project)Thermoelectric materials are devices that have the ability to convert waste heat to electricity. The widespread use of thermoelectric materials is currently limited by the low value of their figure-of-merit (ZT). Bismuth ... -
“Sources and Distribution of Suspended Particulate Matter (SPM) Using Stable Isotopes In The Central Arabian Gulf”
(2020 , Master Thesis)Suspended Particulate matter (SPM) (>0.45µm) plays a significant role in the global carbon cycle. Hence, we measured changes in concentrations of SPM with depth and at distances from shore in the exclusive economic zone ... -
Diagnostic Checking For Linearity in Time Series Models
(2020 , Master Thesis)In this thesis, I studied the well-known portmanteau tests appearing in the time series literature. In particular, I interest in reviewing the test statistics that can be used to check the adequacy of the fitted ... -
Impact of Prolonged Exposure to Sour Service on the Mechanical Properties and Corrosion Mechanism of Nace Carbon Steel Material Used In Wet Sour Gas Multiphase Pipeline in Qatar
(2020 , Master Thesis)Oil and Gas industries involve severe corrosive/sour environmental conditions due to H2S and CO2 and moisture content. The National Association of Corrosion Engineers, NACE, has developed standards to enable the users ... -
Study of the Ion Interclation Mechanism in Mxene Membrane for the Water Treatment Applications
(2020 , Master Thesis)MXene membrane consists of free-standing layers of a 2D material, namely MXene, which is attracting growing interest due to its conductivity and well-defined interlayer distance and slit-like channels, making it ... -
Development of a Novel Polymer-Modified Graphene Oxide Nanocomposites for Controlling Calcium Sulfate Scaling and Biofouling on Reverse Osmosis Membrane: Mechanistic Study
(2020 , Dissertation)Reverse Osmosis (RO) is a promising environment friendly desalination technology for clean water production. However, the performance of RO is getting affected by the mineral scaling and biofouling. During this research, ... -
Parameter Estimation and Prediction of Future Failures in the Log-Logistic Distributions Based on Hybrid-Censored Data
(2020 , Master Thesis)The main purpose of this thesis is to study the prediction of future observations of a Log-Logistic distribution from Hybrid Censored Samples. We will study parameter point estimation, interval estimation, different ... -
Uncovering the Epigenetic Contribution of Protein Arginine Methyltransferase 5 (PRMT5) during Zebrafish Cardiomyogenesis
(2020 , Dissertation)The heart develops through an extremely intricate process mediated by a network of transcription factors initiated by key chromatin modification events. Scientist have implicated the protein arginine methyltransferase ... -
العلامة في التراث البلاغي في القرنين الرابع والخامس الهجريين ( في ضوء الدراسات السيميائية الحديثة)
(2020 , Master Thesis)تعد العلامة إحدى الدراسات اللسانية التي أولتها الدراسات السيميائية اهتماما بارزا، ونتوقع أن نجد في التراث العربي بعض المعالجات السيميائية للعلامة، لكون الحياة الثقافية للبشرية عموما كامنة في الوعي الإنساني، و التراث العربي ... -
المرجعية الثقافية في الخطاب الروائي في قطر : روايتا (غصن أعوج) و (شو) لأحمد عبدالملك - أنموذجا
(2020 , Master Thesis)باتت الرواية القطرية تتبوأ مكانا على الساحة الثقافية والإبداعية المحلية، وشهدت السنوات الأخيرة تزايد ا في حجم الإصدارات كما وكيفا، فكان من الأهمية الوقوف لدراسة هذا التطور (السردي) فيها. من هنا، عملت الدراسة على تناول ... -
Exploring the Students and Faculty Members Attitudes and Awareness about the Use Of E-Textbooks At Qatar University
(2020 , Professional Masters Project)Digitalization plays a big role in world and has an effect on the tools of learning. In 2013, e-Textbooks became commonly used in most science core curricula and some literary curricula at Qatar University. However, ... -
Investigation and Biological Control of Toxigenic Fungi and Mycotoxins in Dairy Cattle Feed
(2020 , Master Thesis)Mycotoxins are secondary metabolites synthesized by mycotoxigenic fungi, contaminating human and animal food and feed. Aflatoxin B1 (AFB1) and ochratoxins (OTA) are frequently detected in animal feed products causing ... -
Investigation of the Role of Carbonic Anhydrase in Mineral Formation and Magnesium Incorporation by Bacteria from Qatari Sabkhas and Marine Sediments
(2020 , Master Thesis)Mineral-forming bacteria are of great interest in arid environments specifically. These environments are favorable for enhancing the microbial carbonate deposition that is thought to largely influence the sedimentary ... -
Cadmium, an Environmental Contaminant with a Potential Role In Modulating Cardiac Matrix Metalloproteinases
(2020 , Master Thesis)Cadmium (Cd) is a toxic heavy metal that is found in the environment from both natural and anthropogenic sources. It is a xenobiotic environmental pollutant with no known essential biological functions. Exposure to ... -
Prospects of Biocrude Production Potential from Local Diatom
(2020 , Master Thesis)A marine diatom Nitzchia reversa was grown in 5 sq. m open raceway pond (10 cm culture depth, 500 L culture volume) in the Qatari desert environment. After 7 days of growth, the final biomass density reached 0.52 g/L, ... -
Proportional Hazard Regression Model Under Partly Interval-Censoring Assumption with Application to Prison Data
(2020 , Master Thesis)In this thesis the analysis of well-known model in survival study that is Cox proportional hazard regression model via prison Partly Interval Censored (PIC) data is used. The maximum likelihood estimate was considered ... -
أيقونة الغوص في الشعر العربي المعاصر بالخليج
(2020 , Master Thesis)يحاول البحث إعادة قراءة نماذج من شعر الغوص في الخليج العربي من خلال مقاربة سيميائية؛ قصد التحاور مع نصوصه من منظور أنها متعددة المعاني، ومتعددة القراءات، فهي نصوص مفتوحة، وكل قراءة تنتج فيها معاني أخرى. ثم قك شفرات أيقوناته ...
