تصفح Academic حسب العنوان
السجلات المعروضة 9489 -- 9508 من 26426
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Flexible thermo-electrochemical cells using Iodolyte HI-30 for conversion of low-grade heat to electrical energy
( Royal Society of Chemistry , 2016 , Article)In this research work, we investigated the flexible thermo-electro chemical cells (TECs) for the conversion of low-grade heat into electrical energy in the temperature range of 20–70 °C. The TECs were fabricated using 30 ... -
Flexible tri-layer piezoelectric nanogenerator based on PVDF-HFP/Ni-doped ZnO nanocomposites
( Royal Society of Chemistry , 2017 , Article)In this work, we report Ni doped ZnO/poly(vinylidene fluoride-hexafluoropropylene) [PVDF-HFP] nanocomposites prepared by sandwiching and their structural, morphological, thermal, electrical and piezoelectric properties. ... -
Flexible ultra-sensitive and resistive NO2 gas sensor based on nanostructured Zn(X)Fe(1- x)2O4
( Royal Society of Chemistry , 2018 , Article)Low concentration gas detection, rapid response time and low working temperature are anticipated for a varied range of toxic gas detection applications. Conversely, the existing gas sensors suffer mostly from a high working ... -
Flexible, biodegradable and recyclable solar cells: a review
( Springer New York LLC , 2019 , Article)Solar energy is conceivably the largest source of renewable energy at our disposal, but vital advances are expected to make solar cells economically viable. Biodegradable and flexible solar cells are currently under extensive ... -
Flexible, Linear, and Systematically Expanded Tetraphosphonate Bolaamphiphiles and Their Inhibition Performance against Calcite and Barite Scale Formation
( American Chemical Society , 2023 , Article)Oilfield scaling is one of the most prevalent water-based oilfield production problems. Chemical inhibitors are often used to combat and prevent scale deposition. The phosphonate functional group is commonly used in many ... -
Flexural and interfacial behavior of externally bonded/ mechanically fastened fiber-reinforced polymer-strengthened reinforced concrete beams
( American Concrete Institute , 2014 , Article)The determination of structural behavior requires advanced numerical methods, of which results are substantiated by credible experimental findings. This research aims to create precise finite element models for fiber-reinforced ... -
Flexural Behavior of Basalt Fiber Reinforced Concrete Beams with Recycled Concrete Coarse Aggregates
(2017 , Master Thesis)The State of Qatar has experienced tremendous economic development in the last decades. As a result, massive quantities of building materials have been used to accommodate the great pace in construction. However, Qatar ... -
Flexural behavior of basalt fiber reinforced concrete beams with recycled concrete coarse aggregates
( Elsevier Ltd , 2018 , Article)This study investigates the effect of using recycled concrete aggregates (RCA) from construction and demolition (C&D) waste combined with basalt macro-fibers (BMF) on the flexural behavior and ultimate capacity of reinforced ... -
Flexural Behavior Of Basalt Fiber Reinforced One-Way Concrete Slabs Reinforced With Fiber Reinforced Polymer Bars
(2018 , Master Thesis)The State of Qatar suffers from a harsh environment in the form of high temperature that prevails almost all year round, in addition to severe humidity and coastal conditions. This exposure leads to the rapid deterioration ... -
Flexural behavior of basalt fiber-reinforced concrete slab strips reinforced with BFRP and GFRP bars
( Elsevier Ltd , 2019 , Article)This research investigates experimentally and analytically a novel one-way slab system reinforced with either basalt fiber-reinforced polymer (BFRP) or glass fiber-reinforced polymer (GFRP) longitudinal bars embedded in ... -
Flexural Strengthening Of Reinforced Concrete Beams Using Fabric Reinforced Cementitious Matrix Systems
(2019 , Master Thesis)This thesis is an experimental study performed to investigate the effectiveness of near surface embedded (NSE) and the hybrid near surface embedded externally bonded (NSE/EB) fabric reinforced cementitious matrix (FRCM) ... -
Flexural strengthening of reinforced concrete beams using hybrid near-surface embedded/externally bonded fabric-reinforced cementitious matrix
( Elsevier , 2020 , Article)The efficacy of hybrid near-surface embedded/externally bonded (NSE/EB) fabric-reinforced cementitious matrix (FRCM) for flexural strengthening of reinforced concrete (RC) beams was assessed experimentally. Bending tests ... -
Flight Scheduling in the Airspace
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)This paper addresses an important problem in the aircraft traffic management caused by the rapid growth of air traffic. The air route traffic control center has to deal with different plans of airlines in which they specify ... -
Flight Versus Ground Out-of-hospital Rapid Sequence Intubation Success: a Systematic Review and Meta-analysis
( Taylor and Francis Ltd , 2018 , Article)Introduction: Endotracheal intubation (ETI) is a critical procedure performed by both air medical and ground based emergency medical services (EMS). Previous work has suggested that ETI success rates are greater for air ... -
Flipping introductory programming class: Potentials, challenges, and research gaps
( Association for Computing Machinery , 2018 , Conference Paper)This paper discusses the suitability of adopting flipped classroom model as instructional method to teach introductory computer programming courses at higher education. It explores how the potentials of this model can be ... -
Floating capital pattern and biomass slope allocation method in the life history of calotropis procera (AIT.) AIT. F.
( Qatar University , 1992 , Article)Plants of the woody perennial Calotropis procera (Asclepediaceae) were grown from seed to seed-set in an open field. Smith's slope allocation and fractional-allocation or percentage methods were used to study dry matter ... -
Flocculation and viscoelastic behavior of industrial papermaking suspensions
( Springer New York LLC , 2016 , Article)The effects of the surface charge type and density C496, C492 and A130LMW polyacrylamides (PAMs) on the rheological behavior of real industrial papermaking suspensions were quantitatively related to the degree of flocculation ... -
Flood Risk Assessment and Protection Guidelines for Infrastructure Planning in Qatar
( Qatar Univesrity Press , 2020 , Conference Paper)This paper presents key features of "Flood Assessment and Protection Guidelines" (FAPG) prepared by the Ministry of Municipality and Environment (MME), Qatar. It is intended that the FAPG will provide guidance and assistance ... -
The Flora of The State of Qatar: Its History and Present-Day Status
( Qatar University , 2005 , Article)The history of botanical exploration in the State of Qatar is of recent origin. Various collections culminated in 2 major Floras for the State of Qatar in 1981 and 1983. Since then, further collections and focus on several ... -
Flow and Fracture Behaviour of Tungsten Fiber Reinforced Superalloy Composites-Effect Of Specimen Geometry
( Qatar University , 1989 , Article)The influence of aspect ratio (i.e. width to height ratio) of test specimens on the flow and fracture behaviour of fiber reinforced composites is herein examined. The composite material was prepared by isostatic pressing ...
