Hassan First University

Settat, Morocco

Hassan First University

Settat, Morocco

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Aziz L.,Cadi Ayyad University | Raghay S.,Cadi Ayyad University | Jamali A.,Hassan First University
Mediterranean Microwave Symposium | Year: 2015

Wireless Sensor Networks (WSNs) have attracted many researches. Wireless Sensor Networks (WSNs) are an emerging technology used for various applications such as military surveillance, emergency situations, habitat monitoring, automation, agriculture, and health care. Energy efficiency is the major challenging issue In wireless sensor networks as it affects the network lifetime and stability. In this paper, we propose a new improved algorithm of LEACH protocol for WSN based on distance and the total energy of clusters to minimize the energy consumption of nodes and extend the life of the network. © 2014 IEEE.


Benkirane S.,Cadi Ayyad University | Mostafa S.,Hassan First University | Hasnaoui M.L.,University Sidi Mohammed Ben Abdellah | Beni-Hssane A.,Chouaïb Doukkali University
International Conference on Intelligent Systems Design and Applications, ISDA | Year: 2016

Routing in VANET has been studied and investigated widely in the past few years. Since VANETs are a specific class of ad hoc networks, the commonly used ad hoc routing protocols initially implemented for MANETs have been tested and evaluated for use in a VANET environment. In this paper we study and analyze two mobiles ad-hoc routing protocols AODV and DSR in a VANET environment especially in a City scenario, using simulation tools. © 2015 IEEE.


Aamri F.E.,Laboratory of Radiation Matter and Instrumentation | Maker H.,Hassan First University | Mouhsen A.,Laboratory of Radiation Matter and Instrumentation | Harmouchi M.,Laboratory of Radiation Matter and Instrumentation
Proceedings of 2015 IEEE International Renewable and Sustainable Energy Conference, IRSEC 2015 | Year: 2015

Renewable Power Systems and in particular Grid-Connected PV Inverter Should not be limited injecting the active power into the grid. However, it must be able to absorb or to generate sufficient reactive power for a certain amount of time according to the grid demand in order to maintain the grid voltage. This paper aims to design a system that controls the active and the reactive power for a Single-Phase Grid-Connected PV Inverter. The new strategy presented is based on dq transformation, after determining the amplitude of the current I - q in the rotating frame, which means a reactive power quantity that defines the angle phase between the grid current and the grid voltage, the AC reference current generated at the output of inverse dq transformation will be used then for the inverter output current control, without using two feedback control, feedback control for the reactive power and another for the active power. © 2015 IEEE.


Bounafaa A.,Hassan First University | Bounafaa A.,Université de Sherbrooke | Berrougui H.,Université de Sherbrooke | Berrougui H.,Sultan Moulay Slimane University | And 10 more authors.
PLoS ONE | Year: 2015

The purpose of the present study was to investigate the distribution of PON1 Q192R and L55M polymorphisms and activities in a North African population and to determine their association with cardiovascular complications. The prevalence of the QQ, QR, RR, LL, LM, and MM genotypes in the study population was 55.4%, 34.09%, 9.83%, 41.97%, 48.20%, and 9.83% respectively. The Q, R, L, and M alleles had a gene frequency of 0.755, 0.245, 0.67, and 0.33, respectively. The PON1 192 RR genotype was significantly more prevalent among ACS patients than among healthy subjects. There was a 4.33-fold increase in the risk of ACS in subjects presenting the PON1 192 RR genotype compared to those with the QQ genotype (OR=4.33; 95% CI=1.27-17.7). There was a significantly different distribution of PON1 L55M in the ACS patient groups (UA, STEMI, NSTEMI). Moreover, individuals presenting the PON1 55MM genotype present a higher risk for ACS than those with LL genotype (OR=3.69; 95% CI=1.61-11.80). Paraoxonase activities were significantly lower in coronary patients than in healthy subjects. The decrease in PON1 activity was inversely correlated with the number of concomitant risk factors for CVD (r=0.57, p<0.0001). The results of the present study suggested that the PON1 R and M alleles may play a role in the pathogenesis of cardiac ischemia in our North African population and that a decrease in PON1 activity may be a valuable marker for monitoring the development of the atherosclerosis process and the associated cardiovascular complications. Copyright: © 2015 Bounafaa et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


PubMed | Ibn Rochd University Hospital Center, Hassan First University, Université de Sherbrooke and Pasteur Institute of Morocco
Type: Journal Article | Journal: PloS one | Year: 2015

The purpose of the present study was to investigate the distribution of PON1 Q192R and L55M polymorphisms and activities in a North African population and to determine their association with cardiovascular complications. The prevalence of the QQ, QR, RR, LL, LM, and MM genotypes in the study population was 55.4%, 34.09%, 9.83%, 41.97%, 48.20%, and 9.83% respectively. The Q, R, L, and M alleles had a gene frequency of 0.755, 0.245, 0.67, and 0.33, respectively. The PON1 192 RR genotype was significantly more prevalent among ACS patients than among healthy subjects. There was a 4.33-fold increase in the risk of ACS in subjects presenting the PON1 192 RR genotype compared to those with the QQ genotype (OR=4.33; 95% CI=1.27-17.7). There was a significantly different distribution of PON1 L55M in the ACS patient groups (UA, STEMI, NSTEMI). Moreover, individuals presenting the PON1 55MM genotype present a higher risk for ACS than those with LL genotype (OR=3.69; 95% CI=1.61-11.80). Paraoxonase activities were significantly lower in coronary patients than in healthy subjects. The decrease in PON1 activity was inversely correlated with the number of concomitant risk factors for CVD (r=0.57, p<0.0001). The results of the present study suggested that the PON1 R and M alleles may play a role in the pathogenesis of cardiac ischemia in our North African population and that a decrease in PON1 activity may be a valuable marker for monitoring the development of the atherosclerosis process and the associated cardiovascular complications.


Ben Alla S.,Hassan First University | Ezzati A.,Hassan First University
International Review on Computers and Software | Year: 2013

Wireless sensor networks (WSNs) constitute a main component of Internet of Things (IoT) that is emerging as an attractive paradigm. In this paper, we propose a novel dual-radio architecture by adding a high-bandwidth radio on every sensor node. In WSNs, each sensor is equipped with two radio interfaces: the low-power IEEE 802.15.4 radio used on all sensors to transmit data within the network and the high-bandwidth 3G /LTE radio activated only on a subset of sensors, referred to as gateways, for sending data to the IoT. given the traffic demand for each sensor nodes, the number of gateways to deploy and the interference model, we propose a novel deployment method for placing optimal number of gateways in the WSNs where sensor nodes can join the IoT through the network's gateway, such that the lifetime and total throughput that can be supported is maximized while it also ensure a fairness among all sensor nodes. Due to the NPhardness of the problem, we then propose a novel heuristic by decomposing the problem into two sub-problems and solving them separately. From our extensive simulation conducted, using ns-2, we identified that our model improves network performance, including the network lifetime prolongation, throughput maximization, network scalability improvement, the average data delivery delay reduction and lead a high traffic load to meet the diverse application needs of WSNs. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.


Aamri F.E.L.,Hassan First University | Maker H.,Hassan First University | Mouhsen A.,Hassan First University | Harmouchi M.,Hassan First University
International Review on Modelling and Simulations | Year: 2016

This paper aims to present a new method to track the maximum power point for single-stage single-phase grid connected PV inverter, which is based on the partial linearization of the power-voltage PV panel curve coupled to the MPPT algorithm. The proposed approach generates the reference current in order to regulate the power fed into the grid, and it needn’tany accuracy of the PV panel model which may change over time. The current controller approach is based on the stability of the internal dynamic due to the nonlinearity of the PV system and it uses the Lyapunov function that gives globally asymptotically stable trajectories of the closed-loop system. The effectiveness of the control algorithm has been verified by simulating it in Matlab/Simulink software. The proposed control is compared with the conventional approach using PI controller. © 2016 Praise Worthy Prize S.r.l. - All rights reserved.


Alla S.B.,Hassan First University | Ezzati A.,Hassan First University
International Journal on Communications Antenna and Propagation | Year: 2012

One of the main challenges in wireless sensor networks (WSN) is to save severely constrained energy resources, obtain long system lifetime and to guarantee quality of service (QoS). In this paper, a novel energy-aware coverage and connectivity preservation routing protocol (ECCRP) is presented to maximize the working time of full coverage in a given WSN regardless of the deployment patterns of the sensor nodes. The basic idea of the proposed ECCRP protocol is to take the remaining energy of the nodes, coverage redundancy of its sensing ranges and Euclidean distance between nodes and the optimal location of gateways into consideration when selecting gateways and cluster-head nodes. We define a cost metrics that favors those nodes being more energy-redundantly covered as better candidates for cluster heads in a way to determine an energy-efficient route for a data from elected cluster head to the base station through elected gateway. The simulation results demonstrate that the proposed protocol improve the performance of sensing coverage, reduce communications energy, prolong the effective network lifetime with optimal data delivery, increase the duration of the on-duty network and provide up to 139.90% of extra service time with 100% sensing coverage ratio comparing with other existing protocols. © 2012 Praise Worthy Prize S.r.l.- All rights reserved.

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