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Now showing items 191-200 of 229
Two way opportunistic MAC protocol for Ad Hoc networks
(
IEEE
, 2011 , Conference Paper)
In this paper, network coding is introduced in relay based MAC protocols for bidirectional traffic to evaluate the performance in terms of throughput and energy. The idea of proposed scheme is to use high data rate nodes ...
Managing uncertain inventory in supply chain with neural network and radio frequency identification (RFID)
(
IGI Global
, 2011 , Book chapter)
Demand uncertainty leads to fluctuations in inventory position at each echelon of a supply chain causing bullwhip effect, which can lead to significant cost and loss of efficiency and waste of resources. One of the aspects ...
Advanced experimental setup for the reliability characterization of radio-acoustic sensors in water pipes
(
IEEE
, 2011 , Conference Paper)
The paper presents the design and construction of a test bench for the analysis and certification of radio-acoustic sensors inside conduits filled with liquids. It is a brand new test-set that integrates the capability to ...
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 ...
Teacher perceptions of professional development in the context of national educational reform: the case of Qatar*
(
Blackwell Publishing Ltd
, 2011 , Article)
In light of nationally mandated educational changes in Qatar, this study investigates in-service teachers' perceptions of professional development (PD). The aims are to identify challenges facing teachers' PD. The respondents ...
Model for oscillations in the guidance of ions through insulating nanocapillaries
(
IOP Publishing
, 2011 , Conference Paper)
The pre-equilibrium period of the ion guiding through insulating nanocapillaries is characterized by the production of temporary charge patches inside the capillaries. The dynamics of the charge patch creation is revealed ...
High-performance adaptive Perturb and observe MPPT technique for photovoltaic-based microgrids
(
IEEE
, 2011 , Article)
Solar photovoltaic (PV) energy has witnessed double-digit growth in the past decade. The penetration of PV systems as distributed generators in low-voltage grids has also seen significant attention. In addition, the need ...
Domains of privacy and hospitality in Arab Gulf homes
(
Emerald Publishing
, 2011 , Article)
Purpose: The purpose of this paper is to report findings of an ethnographic study of homes in the Arab Gulf country of Qatar. The authors' analysis and contribution focuses on resolving the tension between privacy and ...
Parameter Estimation of Biological Phenomena Modeled by S-systems: An Extended Kalman Filter Approach
(
IEEE
, 2011 , Conference Paper)
Recent advances in high-throughput technologies for biological data acquisition have spurred a broad interest
in the development of mathematical models for biological phenomena. S-systems, which offer a good compromise ...
The prevalence of vitamin D deficiency among female college students at Qatar University
(
Medical Services Department Saudi Arabian Armed
, 2011 , Article)
Nowadays vitamin D deficiency is considered as a common problem among many Arab countries including Lebanon, Qatar, Saudi Arabia, UAE and other European countries as documented by many studies (1,2,3,5). Vitamin D is a ...