Browsing Faculty Contributions by Title
Now showing items 9233-9252 of 17724
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Investigation of the Learning Environment in Higher and Lower Performing "Education for a New Era" Schools
(2010 , Conference Paper)Recently, Qatar established key elements of educational reform including curriculum standards; emphasis on student-centered teaching; charter school establishment; standards-based assessment; English as the language of ... -
Investigation of the performance of biocompatible gas hydrate inhibitors via combined experimental and DFT methods
( Academic Press , 2017 , Article)In this work, three ionic liquids (ILs) from the bio-compatible family of choline cations attached to anions of varying hydrophobicity namely: choline acetate (ChOAc), choline bistriflamide (ChNtf2), and choline chloride ... -
An investigation of the relationship between cyberbullying, cybervictimization and depression symptoms: A cross sectional study among university students in Qatar
( Public Library of Science , 2021 , Article)Background Cyberbullying is a modern form of bullying that could be practiced electronically or on the internet. It is related to different mental health issues such as depression, which can affect both the cyberbully and ... -
Investigation of the steps involved in the difference of susceptibility of Ephestia kuehniella and Spodoptera littoralis to the Bacillus thuringiensis Vip3Aa16 toxin
( Elsevier , 2011 , Article)BUPM95 is a Bacillus thuringiensis subsp. kurstaki strain producing the Vip3Aa16 toxin with an interesting insecticidal activity against the Lepidopteran larvae Ephestia kuehniella. Study of different steps in the mode of ... -
Investigation of the structural, optical and gas sensing properties of PANI coated Cu-ZnS microsphere composite
( Royal Society of Chemistry , 2020 , Article)Polyaniline (PANI)/Cu-ZnS composites with porous microspheres are prepared by a hydrothermal and in situ polymerization method. The structural, optical, and morphological properties are characterized by X-ray powder ... -
Investigation of the temperature-relatedwear performance of hard nanostructured coatings deposited on a s600 high speed steel
( MDPI AG , 2019 , Article)Thin hard coatings are widely known as key elements in many industrial fields, from equipment for metal machining to dental implants and orthopedic prosthesis. When it comes to machining and cutting tools, thin hard coatings ... -
Investigation of the tribological and biomechanical properties of CrAlTiN and CrN/NbN coatings on SST 304
( Elsevier Ltd , 2017 , Article)This study examines the influence of thin layer coatings of CrAlTiN and CrN/NbN, deposited via physical vapor, on the biocompatibility, mechanical, tribological, and corrosion properties of stainless steel 304. The ... -
Investigation of the use of TiO2 doped with metal ions in water disinfection
( IWA Publishing , 2010 , Article)This research was conducted to improve titanium dioxide by transition metal doping using cooper. Sol gel method was used to prepare metal doped TiO 2. Titanium isopropoxide and commercial TiO2 P25 were employed as catalyst ... -
Investigation of the use of TiO2 doped with metal ions in water disinfection
( IWA Publishing , 2010 , Article)This research was conducted to improve titanium dioxide by transition metal doping using cooper. Sol gel method was used to prepare metal doped TiO 2. Titanium isopropoxide and commercial TiO2 P25 were employed as catalyst ... -
Investigation of thin-film composite hollow fiber forward osmosis membrane for osmotic concentration: A pilot-scale study
( Springer , 2022 , Article)The current study applied the forward osmosis (FO) based osmotic concentration (OC) process at the pilot-scale for concentrating synthetic feed solution (FS). The process water (PW) salinity represents effluents from the ... -
Investigation of three-phase capacitor-tapped multi-module voltage source converter with selective harmonic elimination
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)In conventional Two-Level Voltage Source Converters (2L-VSCs), connecting between high/medium dc voltage and medium/low ac voltage requires semiconductor devices rated at the high/medium dc-voltage, which negatively affects ... -
Investigation of Weather Impacts on Pedestrian Volumes
( Elsevier B.V. , 2016 , Conference Paper)This study investigates the impacts of temporal and weather characteristics on pedestrian volumes in a hot climate condition. A major neighborhood located in an urban area in Doha, Qatar was chosen as a case study site. ... -
Investigation of Zr-doped ceria for solar thermochemical valorization of CO2
( John Wiley and Sons Ltd , 2020 , Article)This study belongs to the estimation of the CO2 conversion ability of Ce1−xZr xO2 (CZ) materials performing multiple thermogravimetric CO2 splitting (CDS) cycles. By varying the molar concentrations of Zr in the range of ... -
Investigation on effective thermal conductivity and relative viscosity of cellulose nanocrystal as a nanofluidic thermal transport through a combined experimental - Statistical approach by using Response Surface Methodology
( Elsevier , 2017 , Article)Combined experimental-statistical approach for effective thermal conductivity and relative viscosity determination were investigated in this present study. Nanofluid used was dispersion of novel nanomaterial Cellulose ... -
Investigation on inlet obstruction in transitional flow regime: Heat transfer augmentation and pressure drop analysis
( Elsevier , 2022 , Article)Thermohydraulic characteristics of air as the working medium in a circular heated channel fitted with inlet obstruction (ribbed prism) at the inlet is carried out experimentally for transitional flow regime. The ribbed ... -
Investigation on SVM-Backstepping sensorless control of five-phase open-end winding induction motor based on model reference adaptive system and parameter estimation
( Elsevier B.V. , 2019 , Article)This paper deals with a new control technique applied to five-phase induction motor under open-end stator winding (FPIM-OESW) topology using the backstepping nonlinear control. The main objective is to improve the dynamics ... -
Investigation on the effect of LiTFSI salt on PVDF-based Solid Polymer Electrolyte Membranes for Lithium-Ion Batteries
( Qatar University Press , 2021 , Poster)Solid polymer electrolytes provide an alternative approach to providing improved safety whilst concurrently acting as a performance enhanced separator within Lithium-ion batteries (LIBs). This investigation studies the ... -
Investigation on the effect of mud additives on the gelation performance of PAM/PEI system for lost circulation control
( Society of Petroleum Engineers , 2021 , Conference Paper)Lost circulation is one of the most common problems in the drilling of oil and gas wells where mud escapes through natural or induced fractures. Lost circulation can have severe consequences from increasing the operational ... -
Investigation on the effect of several parameters involved in the biodegradation of polyethylene (PE) and low-density polyethylene (LDPE) under various seawater environments
( Elsevier , 2024 , Article)This work investigates the biodegradation of polyethylene (PE) and low-density polyethylene (LDPE) and the leaching of their harmful additives. Micro/macro-plastics of both types were subjected to different laboratory-controlled ... -
Investigation on the effect of γ-irradiation on the dielectric and piezoelectric properties of stretchable PVDF/Fe–ZnO nanocomposites for self-powering devices
( Royal Society of Chemistry , 2018 , Article)Stretchable films of PVDF nanocomposites containing iron doped ZnO (Fe-ZnO) nanoflowers are fabricated following simple solution mixing and ?-irradiation treatment. An increase in ?-phase crystallinity is noticed for the ...