تصفح Civil and Environmental Engineering حسب العنوان
السجلات المعروضة 405 -- 424 من 781
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Hybrid NSE/EB technique for shear strengthening of reinforced concrete beams using FRCM: Experimental study
( Elsevier Ltd , 2018 , Article)The externally bonded (EB) fabric reinforced cementitious matrix (FRCM) has successfully been used as a structural strengthening for various applications including flexural and shear strengthening of reinforced concrete ... -
Hybrid Split Hopkinson Pressure Bar to Identify Impulse-dependent Wave Characteristics of Viscoelastic Phononic Crystals
( Springer New York LLC , 2019 , Article)There has recently been a rising interest in the nonlinear wave transmission behavior of phononic crystals. However, experimental studies focusing on the nonlinear wave transmission behavior of phononic crystals have been ... -
Hydrate surface area measurements during dissociation using dynamic 3d synchrotron computed tomography
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference Paper)Availability of natural hydrates and ongoing rise in demand for energy, motivated researchers to consider hydrates as a potential energy source. Prior to gas production operations from hydrate-bearing sediments, hydrate ... -
Hydration, Pore Solution, and Porosity of Cementitious Pastes Made with Seawater
( American Society of Civil Engineers (ASCE) , 2019 , Article)Unreinforced concrete or concrete reinforced with noncorrosive reinforcement could potentially be mixed with seawater in locations where potable water is scarce. A fundamental understanding of the properties of concrete ... -
Hydration, strength, and shrinkage of cementitious materials mixed with simulated desalination brine
( ASTM International , 2019 , Article)The process of desalination results in the production of a hypersaline waste by-product known as reject brine. In some locations, this reject brine is dumped back into the ocean, which has potentially detrimental effects ... -
Identifying the relationship between intention to use flat-rate public transport and trip frequency by a discrete-continuous model
( Springer Nature , 2023 , Article)Public transport fare is a central feature of transit operations and is a key indicator to reflect transport demand. Yet, relatively little is known about how fare influences on ridership dynamics, including for which types ... -
Impact of aeration rate and dielectrophoretic force on fouling suppression in submerged membrane bioreactors
( Elsevier B.V. , 2019 , Article)Membrane bioreactors (MBRs) present a unique opportunity in waste water treatment by combining the activated sludge process with membrane filtration. Although MBRs require less area, produce less volume of sludge and have ... -
Impact of Aging on the Microstructure of Asphalt Binder Modified with Antioxidant Additives and Copolymers
( Chinese Society of Pavement Engineering , 2023 , Article)The effect of long-term aging on asphalt binders mixed with antioxidant additives and copolymers demonstrated potential for retarding oxidative aging at the nanoscale based on atomic force microscopy (AFM) characterization. ... -
The impact of cognitive load on a lane change task (LCT) among male autistic individuals: A driving simulator study
( Elsevier , 2024 , Article)This study investigated the impact of cognitive load on driving among autistic individuals with the use of an adapted, driving simulator-based, Lane Change Task (LCT). A secondary task was used to induce increasing verbal ... -
Impact of Draw Solution Concentration on Forward Osmosis Process: A Simulation Study
( Qatar Univesrity Press , 2020 , Conference Paper)In this study, a simulation model was used to evaluate the performance of forward osmosis process. A solution of low salinity was used as the feed solution in forward osmosis to dilute saline solution (i.e. draw solution) ... -
Impact of fines type on gas flow using 3D micro-computed tomography
( Society of Petroleum Engineers , 2019 , Conference Paper)Methane hydrates are promising unconventional energy source with natural reserves above 1,000 Trillion m3. Hydrates are found in saturated sandy sediments, where multi-phase flow of gas takes place through sediment's pores, ... -
Impact of fines type on gas flow using 3D micro-computed tomography
( Society of Petroleum Engineers , 2019 , Conference Paper)Methane hydrates are promising unconventional energy source with natural reserves above 1,000 Trillion m3. Hydrates are found in saturated sandy sediments, where multi-phase flow of gas takes place through sediment's pores, ... -
Impact of high turbidity on reverse osmosis: Evaluation of pretreatment processes
( Desalination Publications , 2020 , Article)This study evaluates the performance of sand filtration (SF) and ultra-filtration (UF) as pretreat-ment processes for reverse osmosis (RO) for seawater with turbidities of 4.8, 23.2, and 99.7 NTU. For seawater with a ... -
Impact of Ionic Strength on Colloid Retention in a Porous Media: A Micromodel Study
( Qatar Univesrity Press , 2020 , Conference Paper)Release of deposited colloids in the soil porous media during two-phase flow poses potential health hazard due to the facilitated transport of contaminants towards groundwater reservoirs. Considerable uncertainties exist ... -
Impact of Pore Morphology on Colloid Migration at Variable Saturation Levels of Natural Porous Media
( Qatar University Press , 2023 , Conference Paper)The migration of colloids within porous media has a critical impact on many important industrial processes such as oil production and groundwater recharge. Colloids can clog the pore space and hence impair the permeability ... -
Impact of Pulsed Dielectrophoretic Supply on the Function of Microorganisms in Membrane Bioreactors
( American Society of Civil Engineers (ASCE) , 2018 , Article)This study aims to investigate the effect of dielectrophoretic (DEP) force on microorganisms' viability in a membrane bioreactor (MBR). The impact of different electrical potentials (5-150 V) and different exposure durations ... -
The impact of rural expressway environments: drivers’ attention allocation to variable message signs
( Taylor & Francis , 2022 , Article)Variable Message Signs (VMS) are implemented at varying locations of the expressway. In this study, we compared the drivers’ attention allocation to a ‘drive safely’ message on several VMS gantries that were located at six ... -
Impact of the pulsed voltage input and the electrode spacing on the enhancement of the permeate flux in a dielectrophoresis based anti-fouling system for a submerged membrane bioreactor
( Elsevier , 2017 , Article)A new electrode configuration based on dielectrophoresis (DEP) for a Submerged Membrane Bioreactors was suggested. The intensification of the permeate flux with the new system was examined experimentally using a pulsed DEP ... -
The Impacts of Mobility-as-a-Service (MaaS) on a Diverse Society: A Framework for Advanced Assessment
( Elsevier B.V. , 2024 , Conference Paper)With the latest developments in transportation technologies and services, the concept of MaaS has spawned its way, where consumers can purchase access to different modes and services owned and operated by several mobility ... -
Implementation of mechanistic-empirical pavement analysis in the State of Qatar
( Taylor & Francis , 2014 , Article)The State of Qatar is experiencing tremendous growth in infrastructure including road network and highways. The current methods used in design of asphalt pavements in the State of Qatar are empirical and might not be ...