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Outage analysis of hybrid FSO/RF systems based on finite-state Markov chain modeling
(
IEEE
, 2014 , Conference Paper)
In this paper, we analyze the outage probability of a hybrid free-space optical/radio-frequency (FSO/RF) communication system with soft-switching. In soft-switching approach, either one of the links or both links can be ...
Relationship between perceived and observed student-centred learning environments in Qatari elementary mathematics and science classrooms
(
Springer Netherlands
, 2014 , Article)
Recently, Qatar established educational reform in charter (independent) schools focusing on curriculum standards, student-centred teaching, standards-based assessment, English as the language of instruction, and extensive ...
Secure and efficient data transmission for cluster-based wireless sensor networks
(
IEEE
, 2014 , Article)
Secure data transmission is a critical issue for wireless sensor networks (WSNs). Clustering is an effective and practical way to enhance the system performance of WSNs. In this paper, we study a secure data transmission ...
Biophysical studies of the effect of high power ultrasound on the DNA solution
(
Elsevier B.V.
, 2014 , Article)
Stability and molecular size of the DNA double helical structure were studied on an aqueous solution of DNA after exposure to high power doses of continuous wave ultrasound at frequency of 20kHz. Thermal transition ...
Energy-efficient cloud resource management
(
IEEE
, 2014 , Conference Paper)
We propose a resource management framework that reduces energy consumption in cloud data centers. The proposed framework predicts the number of virtual machine requests along with their amounts of CPU and memory resources, ...
The Prevalence of Tobacco Smoking in Patients With Diabetes in Hospital Pulau Pinang, Malaysia
(
Elsevier
, 2014 , Article)
Widespread evidence has demonstrated the negative effects of tobacco smoking
in patients with diabetes. Although many studies have explored the prevalence of
tobacco smoking in the general population, data are lacking ...
Clinical pharmacokinetic drug interactions associated with artemisinin derivatives and HIV-antivirals
(
Springer International Publishing
, 2014 , Article Review)
Management of HIV and malaria co-infection is challenging due to potential drug-drug interactions between antimalarial and HIV-antiviral drugs. Little is known of the clinical significance of these drug interactions, and ...
Limited feedback unitary precoding for MIMO full stream transmission
(
Institute of Electrical and Electronics Engineers Inc.
, 2014 , Article)
Limited feedback precoding (LFP) significantly improves multiple-input-multiple-output (MIMO) spatial multiplexing link reliability with a small amount of feedback from the receiver back to the transmitter. One of the key ...
Multivariate statistical process control charts based on the approximate sequential ?2 test
(
Taylor and Francis Ltd.
, 2014 , Article)
Similar to the univariate CUSUM chart, a multivariate CUSUM (MCUSUM) chart can be designed to detect a particular size of the mean shift optimally based on the scheme of a sequential likelihood ratio test for the noncentrality ...
Concentration, composition and sources of PAHs in the coastal sediments of the exclusive economic zone (EEZ) of Qatar, Arabian Gulf
(
Elsevier Ltd
, 2014 , Article)
Surface sediments were collected from sixteen locations in order to assess levels and sources of polycyclic aromatic hydrocarbons (PAHs) in sediments of Qatar exclusive economic zone (EEZ). Samples were analyzed for 16 ...