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السجلات المعروضة 7557 -- 7576 من 7854
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Unconventional experimental technologies available for phase change materials (PCM) characterization. Part 1. Thermophysical properties
( Elsevier Ltd , 2015 , Article)The use of thermal energy storage by phase change materials (PCM) is increasing in interest for building applications. For the deployment of the technology, appropriate characterization of PCM and hybrid PCM is essential, ... -
Unconventional experimental technologies used for phase change materials (PCM) characterization: Part 2 - Morphological and structural characterization, physico-chemical stability and mechanical properties
( Elsevier Ltd , 2015 , Article)Due to the high interest of appropriate characterization of PCM and hybrid PCM composites, different research centres and universities are using several material characterization techniques not commonly used with PCM, to ... -
Undecimated wavelet-based Bayesian denoising in mixed Poisson-Gaussian noise with application on medical and biological images
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)Due to photon and readout noise biomedical images are generally contaminated by a mixed Poisson-Gaussian noise. In this paper, we propose a Bayesian image denoising methodology for images corrupted by a mixed Poisson-Gaussian ... -
Underage driving and seat-belt use of high school teenagers in Qatar
( Taylor and Francis Inc. , 2017 , Article)Many crashes occur every year that involve drivers who are unlicensed and underage. One of the main challenges for traffic safety authorities is the lack of detailed information about this alarming phenomenon. This study ... -
Underlay cognitive radio : What is the impact of carrier aggregation and relaying on throughput ?
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In this paper, we investigate joint relay selection and optimal power allocation, as a means to maximize the achievable rate of an underlay cooperative cognitive radio with carrier aggregation, taking into account the ... -
Underlay cognitive radio: What is the impact of carrier aggregation and relaying on throughput?
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In this paper, we investigate joint relay selection and optimal power allocation, as a means to maximize the achievable rate of an underlay cooperative cognitive radio with carrier aggregation, taking into account the ... -
Underlying Mechanisms of Transit-Oriented Development: A Conceptual System Dynamics Model in Qatar
( MDPI , 2022 , Article)Transit-Oriented Development (TOD) is an urban planning approach that facilitates the achievement of sustainable development goals from an urban planning and transportation perspective. Developed countries are moving rapidly ... -
Understand my world: An interactive app for children learning arabic vocabulary
( IEEE Computer Society , 2021 , Conference Paper)COVID-19 imposed a new paradigm in education especially in elementary schools. Children are no longer able to go regularly to schools as normal. They should then rely mainly on themselves to learn and acquire knowledge. ... -
Understanding Digital Forensic Characteristics of Smart Speaker Ecosystems
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Conference Paper)With a built-in intelligent personal voice assistant providing QA services, smart speaker ecosystems combine multiple compatible components, including the internet of things (IoT) technology, mobile devices, and cloud ... -
Understanding electricity generation in osmotic microbial fuel cells through integrated experimental investigation and mathematical modeling
( Elsevier Ltd , 2015 , Article)(Graph Presented). Osmotic microbial fuel cells (OsMFCs) are a new type of MFCs with integrating forward osmosis (FO). However, it is not well understood why electricity generation is improved in OsMFCs compared to regular ... -
Understanding ethanol hydrogen abstraction mechanism on CuNi catalyst
( AIChE , 2015 , Conference Paper)In this work we report the synthesis of copper oxide nanoparticles using solution combustion synthesis. These nanopowders are used as catalyst in ethanol decomposition reaction for hydrogen production. In situ study of ... -
Understanding ethanol hydrogen abstraction mechanism on CuNi catalyst
( AIChE , 2015 , Conference Paper)In this work we report the synthesis of copper oxide nanoparticles using solution combustion synthesis. These nanopowders are used as catalyst in ethanol decomposition reaction for hydrogen production. In situ study of ... -
Understanding In-App Ads and Detecting Hidden Attacks through the Mobile App-Web Interface
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)Mobile users are increasingly becoming targets of malware infections and scams. In order to curb such attacks it is important to know how these attacks originate. We take a previously unexplored step in this direction. ... -
Understanding probabilistic cognitive relaying communication with experimental implementation and performance analysis
( MDPI AG , 2019 , Article)Efficiently use of the limited wireless spectrum can be achieved by cooperative cognitive relaying, where secondary users (SUs), who do not pay for the licensed spectrum and have better channel condition to the primary ... -
Understanding Simple Stories through Concepts Extraction and Multimedia Elements
( Springer , 2012 , Conference Paper)Teaching children with intellectual disabilities is a challenging task. Instructors use different methodologies and techniques to introduce the concepts of lessons to the children, motivate them and keep them engaged. These ... -
Understanding the association between cell phone use while driving and seat belt noncompliance in Qatar using logit models
( Taylor & Francis , 2018 , Article)Cell phone use while driving can distract the driver and can lead to serious traffic safety problems. Similarly, not using a seat belt can increase the risk of injuries and/or fatalities in the event of a crash. The objective ... -
Understanding the electrochemical performance of LiNi0. 5Mn1.5O4 coated with Yttria and distributed over graphene nanosheets as cathode in li-ion batteries
( Qatar University Press , 2021 , Poster)LiNi0.5Mn1.5O4 is a promising cathode material for lithium-ion batteries with a high-voltage spinel structure. A microwave-assisted chemical co-precipitation method was used to synthesize Y2O3 coated quasi-spheres of ... -
Understanding the Impact of Emotions on the Quality of Software Artifacts
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)This paper proposes a framework for investigating the impact of emotions on the quality of software artifacts and portrays some observations captured during the development of several software engineering projects. The ... -
Understanding the impact of network structure on propagation dynamics based on mobile big data
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Understanding the propagation dynamics of information/an epidemic on complex networks is very important for discovering and controlling a terrorist attack, and even for predicting a disease outbreak. As an effective method, ... -
Understanding the Origin of the Ultrahigh Rate Performance of a SiO2-Modified LiNi0.5Mn1.5O4 Cathode for Lithium-Ion Batteries
( American Chemical Society , 2019 , Article)LiNi0.5Mn1.5O4 (LNMO) is one of the most promising cathode materials for next-generation lithium-ion batteries for rapid charging–discharging applications. The surfaces of LNMO samples are coated with different amounts ...
