Browsing by Title
Now showing items 10249-10268 of 50007
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Experimental results and modelling of corrosion-damaged concrete beams strengthened with externally-bonded composites
( Elsevier Ltd , 2018 , Article)This paper presents the results of 3D finite element (FE) modelling of corrosion-damaged reinforced concrete (RC) beams strengthened in flexure with externally-bonded composites. The models were validated against the results ... -
Experimental Setup for Measuring Relaxation from EEG Signals during Immersion in VR Environments
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Conference Paper)According to the Global Organization for Stress, 80 percent of people are stressed at work and according to the American Institute of Stress, stress causes 48 percent of people to have difficulty sleeping. Relaxation reduces ... -
Experimental setup to validate the effects of major environmental parameters on the performance of FSO communication link in Qatar
( MDPI AG , 2018 , Article)Weather conditions and chemical composition of the atmosphere are the most uncontrollable challenges for free-space optical (FSO) communications. Environmental parameters contribute directly in the characterization of ... -
Experimental studies and computer modeling of viscoelastic properties of heart valve leaflets: Implication in heart valve tissue engineering
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)Diseased or damaged heart valve leaflets are amongst the major causes of illness and death globally. The currently available treatment of heart valve patients is to mend the damaged valves, but in most severe cases, heart ... -
Experimental studies on the biodiesel production parameters optimization of sunflower and soybean oil mixture and DI engine combustion, performance, and emission analysis fueled with diesel/biodiesel blends
( Elsevier Ltd , 2019 , Article)The influence of diesel/biodiesel blends on engine combustion, performance, and exhaust gas emissions have carried out experimentally at different engine loads and constant speed of 1400 rpm. Volumetric percentage of ... -
Experimental study of exhaust emissions and performance of a dual fuel IDI diesel engine
(1999 , Conference Paper)Dual fuel engines of the compression ignition type provide an alternative approach for I.C. engines to improve economy, reduce exhaust emissions and achieve a greater power. The present contribution is an experimental ... -
Experimental study of the attenuation properties of metal-viscoelastic bi-layered materials
( Institute of Physics Publishing , 2018 , Conference Paper)Phononic crystals (PCs) are multi-layered materials with functional elastic wave band gaps where propagation of vibration within these band gaps is restricted. PCs have vibration attenuation properties dependent on their ... -
An Experimental Study of Two-way Ranging Optimization in UWB-based Simultaneous Localization and Wall-Mapping Systems
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Conference Paper)In this paper, we propose a new ultra-wideband (UWB)-based simultaneous localization and wall-mapping (SLAM) system, which adopts two-way ranging optimization on UWB anchor and tag nodes to track the target's real-time ... -
An experimental study on achieving even-frosting for an air source heat pump using a novel dual-fan outdoor coil
( Elsevier Ltd , 2022 , Article)Many related studies suggested that a fixed airflow direction usually led to that the most frost would only deposit on the windward side of finned tube heat exchangers (FTHXs) of the traditional single fan outdoor coils ... -
Experimental study on combustion, performance, and emission behaviours of diesel /WCO biodiesel/Cyclohexane blends in DI-CI engine
( Institution of Chemical Engineers , 2021 , Article)Waste cooking oil biodiesel is considered a common way to generate clean energy in all countries. It can be used efficiently, like fossil fuel quality. To overcome the problem of poor combustion, an increase in the NOx and ... -
Experimental study on effective placement of PCM packets in cooling vest to improve performance in warm environment
( American Society of Mechanical Engineers , 2017 , Conference Paper)Global warming has increased the risk of heat stress of outdoor workers and one measure against heat stress is wearing passive personal cooling clothing. Passive body cooling systems, including phase change material (PCM) ... -
Experimental study on overcurrent relay setting for maximum protection level
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)This paper addresses both the experimental and simulation studies on the application of overcurrent protective relay. The industrial overcurrent relays often have three individual settings. In this paper, the relay operating ... -
Experimental study on the mechanical properties of biological hydrogels of different concentrations
( IOS Press BV , 2020 , Article)BACKGROUND: Biological hydrogels provide a conducive three-dimensional extracellular matrix environment for encapsulating and cultivating living cells. Microenvironmental modulus of hydrogels dictates several characteristics ... -
Experimental Study on the Performance of Circular Concrete Columns Reinforced with GFRP under Axial Load
( Qatar Univesrity Press , 2020 , Conference Paper)Corrosion of steel reinforcement in concrete structures subjected to severe environments is a big challenge and requires huge repair and maintenance costs. Glass fiber reinforced polymer (GFRP) reinforcement with its ... -
Experimental study on using PCMs of different melting temperatures in one cooling vest to reduce its weight and improve comfort
( Elsevier Ltd , 2017 , Article)This study aims at evaluating experimentally phase change material (PCM) cooling vest performance when incorporating two types of PCM with different melting temperatures with varied PCM placement on the lower, upper, front ... -
Experimental validation of a numerical model for the ground vibration from trains in tunnels
( DC/ConfOrg , 2015 , Conference Paper)Ground vibration and ground-borne noise from trains in tunnels are attracting increasing attention from researchers and engineers. They are important environmental issues related with the operation of underground networks ... -
Experimental validation of nine-level switched-capacitor inverter topology with high voltage gain
( John Wiley and Sons Ltd , 2021 , Article)This paper proposes a new switched-capacitor nine-level (9L) inverter with reduced switch count. In the proposed topology, floating capacitor (FC) is employed as a voltage booster, and it does not need any additional sensors ... -
Experimental Validation of Repair Methods for Earthquake-Damaged Bridges Incorporating Pipe-Socket Precast Pier System
( Qatar University Press , 2023 , Conference Paper)This project focuses on the retrofitting of concrete bridge piers. In the first phase of the project, a half-scale bridge bent was designed and experimentally tested in the Idaho State University (ISU) Structural Lab (SLAB) ... -
Experimental warming differentially affects vegetative and reproductive phenology of tundra plants
( Nature Research , 2021 , Article)Rapid climate warming is altering Arctic and alpine tundra ecosystem structure and function, including shifts in plant phenology. While the advancement of green up and flowering are well-documented, it remains unclear ... -
Experimentally measured methane hydrate phase equilibria and ionic liquids inhibition performance in Qatar’s seawater
( Nature Research , 2020 , Article)Qatar has the third-largest natural gas reserves in the world and is the second largest Liquefied natural gas (LNG) exporter in the world. These reserves are mainly located in its offshore North Field where the gas is ...
