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Now showing items 81-90 of 180
Measuring construction materials price fluctuation risk
(
Canadian Society for Civil Engineering
, 2013 , Conference Paper)
Construction projects costs are believed to be highly susceptible to a combination of internal and external factors. One of these factors is the prices of construction materials and the risk of their fluctuation. This paper ...
Numerical differential protection algorithm for power transformers
(
Institute of Electrical and Electronics Engineers Inc.
, 2013 , Conference Paper)
The differential protective system establishes the main protection against short circuits occurring on transformer windings. This protective system should operate rapidly when internal faults occur. However, it should not ...
Sub-channels selection schemes with interference management for underlay cognitive networks
(
IEEE
, 2013 , Conference Paper)
Cognitive Radio is a promising concept that offers solution to spectral crowding problem by introducing opportunistic usage of the unoccupied licensed frequency bands. Improving the network capacity and reliability of the ...
A USRP-based experimental testbed for OFDM systems impaired by I/Q imbalance
(
IEEE
, 2013 , Conference Paper)
In this paper, an experimental testbed for packet based OFDM systems is proposed using USRP RF front-ends. I/Q imbalance estimation and compensation algorithms are implemented at the receiver by manually injecting I/Q ...
Time-frequency compressed spectrum sensing in cognitive radios
(
Institute of Electrical and Electronics Engineers Inc.
, 2013 , Conference Paper)
In this paper, we investigate the use of time-frequency analysis for improvement of spectrum sensing in cognitive radios and exploit compressed sensing (sampling) to reduce the extremely high sampling rate of signal in ...
Systemic framework of competencies of 21st century technical and engineering human resource: A development case for a knowledge based Economy in Qatar
(
IEEE
, 2013 , Conference Paper)
The required talent of 21st century engineering and technology human resource is significantly different and more complex than what has been needed ever before. Numerous relevant studies have been conducted during the last ...
Evaluation of thermal comfort and cooling performance of residential buildings in arid climates
(
Institute of Electrical and Electronics Engineers Inc.
, 2013 , Conference Paper)
In this paper, a parametric study on the thermal comfort and cooling performance of residential buildings is reported. The study was carried out in the hot arid climatic conditions of Qatar. The influence of diurnal variation ...
Accurate partial discharge classification from acoustic emission signals
(2013 , Conference Paper)
Accurate partial discharge (PD) classification provides significant information to asses power transformers' insulation condition. The work presented in this paper aims to improve classification from acoustic emission ...
A framework for optimizing the supply chain performance of a steel producer
(2013 , Conference Paper)
Supply Chain Management (SCM) is focused on developing, optimizing, and operating efficient supply chains. Efficient supply chains are characterized by cost effective decisions, lean flow and structure, high degree of ...
The evolution of scholarly digital library needs in an international environment: Social reference management systems and Qatar
(
Springer Verlag
, 2013 , Conference Paper)
Qatar has become an active research producer of data, publications, and other scholarly works. We studied the evolving scholarly activities and needs of researchers in this relatively new research environment, and compared ...