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السجلات المعروضة 141 -- 150 من 7085
To Relay or Not To Relay in Cognitive Radio Sensor Networks
(
IEEE
, 2014 , Article)
A recent investigation on MAC layer in cognitive radio networks proposed the primary packet relaying by the secondary node maintaining an extra queue used for this particular addable functionality. Nevertheless, relaying ...
Maximizing Energy Efficiency in Multiple Access Channels by Exploiting Packet Dropping and Transmitter Buffering
(
IEEE
, 2015 , Article)
Quality of service (QoS) for a network is characterized in terms of various parameters specifying packet delay and loss tolerance requirements for the application. The unpredictable nature of the wireless channel demands ...
Implementation and Analysis of Reward Functions under Different Traffic Models for Distributed DSA Systems
(
IEEE
, 2015 , Article)
In this paper, we implement and analyze a resource allocation protocol for distributed dynamic spectrum allocation (DSA) systems. The DSA protocol is a learning-based protocol that allows secondary users (SU) to exploit ...
Beamforming OFDM Performance under Joint Phase Noise and I/Q Imbalance
(
IEEE
, 2015 , Article)
Phase noise (PHN) and in-phase/quadrature (I/Q) imbalance are two major RF impairments in direct-conversion wireless transceivers. Beamforming and orthogonal frequency division multiplexing (OFDM) schemes have been adopted ...
Anthropometric and lifestyle characteristics of active and inactive saudi and british adolescents
(
Wiley Periodicals, Inc.
, 2014 , Article)
To compare the anthropometric and lifestyle characteristics of active and inactive adolescents in Saudi Arabia and Britain. A school-based cross-sectional study was conducted at four cities in Saudi Arabia (Riyadh and ...
Poreless Separator and Electrolyte Additive for Lithium-Sulfur Batteries with High Areal Energy Densities
(
WILEY-VCH Verlag
, 2015 , Article)
Despite the attractive theoretical capacity of sulfur over 1600 mA h g−1, lithium–sulfur (Li–S) batteries suffer from insufficient cycle lives mainly due to fatal polysulfide dissolution. This chronic drawback becomes ...
A Tailored, Bundle Care Intervention Strategy to Reduce Cardiac Mortality During the Hajj: A Population-Based, Before and After Study.
(
SAGE Publications
, 2019 , Article)
Hajj is the largest human gathering with over 2 million people. We evaluated the effect of bundle care intervention on mortality. A population-based, before and after study compared the effect of an intervention on mortality. ...
Thermochemical treatment of fly ash for synthesis of mesoporous activated carbon
(
Springer Netherlands
, 2015 , Article)
A mesoporous activated carbon is produced from oil fly ash (OFA) using chemical and thermal treatments at different activation conditions. The ash samples were refluxed with a range of compositions of sulfuric, nitric, and ...
Properties of Dialkylcarbonate + 1-Alkanol Mixtures at the Vacuum Interface
(
American Chemical Society
, 2016 , Article)
The properties of solutions formed by dialkylcarbonate + 1-alkanol solutions are studied using classic molecular dynamics simulations. The effects of solution composition, temperature, and dialkylcarbonate type have been ...
Political Contingency and the Implementation of Qatarization
(
Qatar University
, 2011 , Article)
This paper represents an exploratory study that examines political contingency in a less liberal regulatory regime such as the ‘positive state’ or the ‘developmental state’. As an example of a state-led policy, the ...