Browsing College of Engineering by Title
Now showing items 3241-3260 of 7854
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Experimental investigation on the performance of a novel thermo-mechanical refrigeration system driven by an expander-compressor unit
( Elsevier , 2022 , Article)Operating thermos-mechanical refrigeration (TMR) ejector-based and organic Rankine cycle-based refrigeration systems at ultra-low temperature heat source (60 °C to 100 °C) is challenging and limited by their low coefficient ... -
Experimental Investigations of Gas Kick for Single and Two-Phase Gas-liquid Flow in near Horizontal Wells
( Qatar University Press , 2021 , Poster)Multiphase flow in pipelines is of great importance and broadly used in several industries for various applications. A multiphase flow is a complex physical phenomenon where more than one phase occurs. In oil and gas ... -
Experimental investigations on the performance of a thermo-mechanical refrigeration system utilizing ultra-low temperature waste heat sources
( Elsevier , 2023 , Article)Experimental studies that investigate the utilization of ultra-low temperature (between 48 °C and 120 °C) waste heat, which forms 25 % of the global unrecovered waste heat, to drive thermal cooling systems are rare. Thus, ... -
An Experimental Performance Evaluation and Compatibility Study of the Bluetooth Low Energy Based Platform for ECG Monitoring in WBANs
( SAGE publications , 2015 , Article)A long term healthcare monitoring system requires battery operated devices with low-power technologies. Researchers tried to adapt various short-range technologies for Wireless Body Area Networks (WBANs) in ubiquitous ... -
Experimental photovoltaic power supply based on flying capacitors multilevel inverter
( IEEE , 2011 , Conference Paper)Nowadays, a great deal of research is being carried out to utilize the solar energy effectively through power electronics converters (conditioners) to meet the increasing demand for load. In this paper, a weighted Real ... -
Experimental prediction of the elastic properties of nanocomposite cementitious materials based on nanoindentation measurements
( American Scientific Publishers , 2017 , Article)This paper provides in depth novel exploration of the local mechanical properties of nanocomposite cement using the nanoindentation technique. The elastic properties of carbon nanotubes (CNTs)-reinforced and unreinforced ... -
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 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 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 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 ...