Browsing by Title
Now showing items 14191-14210 of 49434
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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 ... -
The investigation of treatment design parameters on carbon integration networks
( Springer Science and Business Media Deutschland GmbH , 2023 , Article)Carbon Integration methods help identify the appropriate allocation of captured carbon dioxide (CO2) streams into CO2-using sinks, and are especially useful when a number of CO2 sink options are present simultaneously. The ... -
Investigation of various Mg(x)Fe(1−x)2O4 (x = 0.1, 0.5 and 0.9) nanostructures as a resistive and flexible LPG sensor
( Elsevier Ltd , 2020 , Article)This report talks in detail about the successful synthesis of nanoparticle material Mg(x)Fe(1−x)2O4 (x = 0.1, 0.5 and 0.9) through a simple and inexpensive sol-gel auto-combustion process and its application as a gas sensor. ... -
An Investigation Of Vibration From Underground Tunnels By Using A Plane-Strain Finite Element Model
(2018 , Master Thesis)In 2013, Qatar Rail announced major rail projects that include an urban rail network for the city of Doha with lines running on the surface and underground which are expected to be in operation by 2020. Railway systems are ... -
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 EV charging stations penetration on KAHRAMAA distribution network
(2021 , Master Thesis)The electrification of transport sector and the increasing demand of EV load supply from grid-connected public EV charging stations (EVCS) have imposed several challenges on the grid. Impacts include but not limited to ... -
Investigation on evacuated tubes coupled solar still with condenser and fins: Experimental, exergo-economic and exergo-environment analysis
( Elsevier Ltd , 2021 , Article)The present experimental work was done to check the performance enhancement in distillate productivity between CSS and MSS in climatic conditions of Gandhinagar, Gujarat, India (23.21° N, 72.63° E). In modified solar still ... -
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 ... -
Investigation on the impact of solvent on the photochemical properties of the photoactive anticancer drug Vemurafenib: A computational study
( Elsevier , 2020 , Article)Rationalizing the photochemical behavior of a photosensitive drug in terms of molecular properties is necessary toward understanding related potential phototoxicity. Here, we report on the effect of the molecular ... -
Investigational Study for the efficiency of Fe3O4@SiO2 nanoparticles in the Oil Recovery Process using glass micromodel
( Qatar University Press , 2021 , Poster)Nanofluids have shown their potential in the oil recovery process through surface modification. Due to their surface characteristics, they can apply to improve the oil production from reservoirs by enabling different ... -
Investigations into structure-property relationships of novel Ru(II) dyes with N,N′-Diethyl group in ancillary ligand for dye-sensitized solar cells
( Elsevier Ltd , 2019 , Article)Structure-property relationships of four novel bipyridyl Ru(II) complexes, denoted as SD-22, SD-24, SD-26 and SD-28, are reported herein. The molecular structures of all four photosensitizers were confirmed using FT-IR, ...
