University IbnTofail

Kenitra, Morocco

University IbnTofail

Kenitra, Morocco
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Benhiba F.,Laboratory of Separation Processes | Benhiba F.,Université Ibn Tofail | Zarrok H.,Laboratory of Separation Processes | Elmidaoui A.,Laboratory of Separation Processes | And 7 more authors.
Journal of Materials and Environmental Science | Year: 2015

Corrosion inhibition by 2-phenyl-1, 4-dihydroquinoxaline (PHQ) on carbon steel in 1.0 M HCl is investigated using electrochemical techniques (EIS and Potentiodynamic polarization), SEM and quantum chemical calculation. Inhibition efficiency of 89% is reached with 5×10-3 M of PHQ at 303 K. Potentiodynamic polarization showed that the PHQ behaves as mixed-type inhibitor. The Nyquist plots showed that increasing PHQ concentration, charge-transfer resistance increased and double-layer capacitance decreased, involving increased inhibition efficiency. Adsorption of the inhibitor molecules corresponds to Langmuir adsorption isotherm. Also, the activation thermodynamic parameters of dissolution were calculated and discussed. Theoretical calculations have been used to make the correlation between the effectiveness of inhibition of our studied inhibitor and their molecular structure.


Chellouli M.,University IbnTofail | Chebabe D.,University IbnTofail | Dermaj A.,University IbnTofail | Erramli H.,University IbnTofail | And 6 more authors.
Electrochimica Acta | Year: 2016

In this work the corrosion inhibition of iron in acidic solution by a formulation based on the oil extracted from the seeds of Nigella Sativa L. (labeled as FBN) was investigated by means of potentiodynamic polarization, electrochemical impedance spectroscopy and weight loss measurements. Results showed that the formulation acts as a good mixed type (cathodic/anodic) inhibitor. The dissolution rate decreased with the increase of the FBN concentration and the immersion time. An inhibition efficiency of 99% was reached for FBN concentration at 2500 ppm. Surface analysis of the samples was performed by Scanning Electron Microscopy coupled with chemical analysis (SEM-EDS) and X-ray Photoemission Spectroscopy (XPS). Results confirmed a good protective action of the FBN film on the iron substrate in acidic solution. The FBN formulation is a not toxic and environmentally safe product, as determined by acute toxicity tests, and can be fruitfully used for a sustainable conservation of iron-based artifacts. © 2016 Elsevier Ltd. All rights reserved.


Fdili O.A.,Mohammed V University | Fdili O.A.,CNRS Institute of Electronics, Microelectronics and Nanotechnology | Coudoux F.-X.,CNRS Institute of Electronics, Microelectronics and Nanotechnology | Fakhri Y.,Mohammed V University | And 3 more authors.
European Signal Processing Conference | Year: 2013

This paper presents an energy efficient adaptive video compression scheme dedicated to wireless video sensor networks. This scheme based on the recent H.264/AVC standard operates using two modes, namely the standby mode and the rush mode. In the standby mode, frame rate is limited while image quality is maintained to a high level. In the rush mode, the frame rate is increased and the Flexible Macroblock Ordering coding tool provided by the H.264/AVC video compression standard is used to produce two service-differentiated macroblocks categories: region of interest (ROI) and background (BKGD). In addition, bit rate adaptation based on frequency selectivity is applied to reduce background data amount. Hence, transmission energy consumption is decreased while maintaining a high quality for ROI. Simulations proved the energy efficiency of the proposed scheme that enables to extend network's lifetime up to three times, and achieves high quality ROIs even at low bit rates. © 2013 EURASIP.


Alaoui-Fdili O.,Mohammed V University | Alaoui-Fdili O.,CNRS Institute of Electronics, Microelectronics and Nanotechnology | Fakhri Y.,Mohammed V University | Fakhri Y.,University IbnTofail | And 3 more authors.
2014 IEEE International Conference on Image Processing, ICIP 2014 | Year: 2014

This paper proposes a model to predict the energy consumption of a H.264/AVC intra-only based encoder designed for the wireless video sensor networks (WVSNs). Such model is of great interest in an energy-constrained context like the WVSN, where the video streams are processed prior to transmission. In fact, accounting for both processing's and transmission's consumed energies allows the optimization of the global energy consumption. The proposed model predicts the processing's energy consumption based on the considered Quantization Parameter (QP) and the Frame Rate (FR) values. The generic form of this model enables it to predict the energy consumption of any H.264/AVC intra-only based encoder. Simulation results demonstrate the accuracy of the proposed model, that is validated under different resolutions, QP and FR, with an average prediction error of 4%. © 2014 IEEE.


El Boukili A.,Mohammed V University | Guessous A.,Mohammed V University | El bazaoui A.,University IbnTofail | El Kacemi K.,Mohammed V University | And 2 more authors.
Journal of Materials and Environmental Science | Year: 2015

The aim of this work is to investigate four samples of agricultural cereal soil, collected in four regions of Morocco: Tadla-Azilal, Chaouia-Ouardigha, Rabat-Sale and Meknes-Tafilalet. Mineralogical composition was determined by X-ray Fluorescence analysis (FX). Thermal analysis, Infrared spectroscopy (IR) and X-ray diffraction (XRD) analysis were performed to characterize the studied soils. The results, of the FX analysis, showed that the most abundant major components are silica, alumina, iron oxide, calcium oxide, magnesium oxide and the organic component. The XRD patterns confirm that the soil from Tadla-Azilal region consists of Quartz, Calcite, Illite and Kaolinite. The soil sample of Khouribga consists of Quartz, Calcite and Dolomite. The soil sample from Rabat-Salé-Zemmour consists of Quartz and Mica. The soil sample Meknes-Tafilalet consists of Quartz and Muscovite. The results of IR and thermal analysis confirm the mineralogical phases identified by XRD and lay in evidence the existence of organic matter in the four soil samples.


Ahmed B.,Mohammed V University | Zytoune O.,Mohammed V University | Zytoune O.,University Ibntofail | Nourddine E.,Mohammed V University | And 3 more authors.
Journal of Theoretical and Applied Information Technology | Year: 2012

A mobile ad-hoc network (MANET) is a collection of wireless mobile nodes communicating without any infrastructure. Due to the availability of small and inexpensive wireless communicating nodes, the MANET field has attracted a lot of attention from industry and academia. MANETs can be used in various applications such as mobile classrooms, battlefield communication and disaster relief applications. They may be divided into homogeneous and heterogeneous ones. Homogeneous Ad-hoc Networks nodes possess the same transmission range, but not for heterogeneous ones (i.e, networks consisting of different wireless mobile devices such as laptops, PDAs and cell phones). In AODV routing protocol, the shortest path between source and destination nodes is always selected, without collecting topology information. In this paper, we propose an improvement of AODV protocol called MDAODV (Mobility aware modified AODV). The new algorithm finds optimum path based on distance, relative velocity between two nodes and hop count. It is confirmed by simulation that this improvement has higher packet delivery ratio than standard AODV protocol. © 2005 - 2012 JATIT & LLS. All rights reserved.


Ahmed B.,Mohammed V University | Ouadoudi Z.,Mohammed V University | Ouadoudi Z.,University Ibntofail | Mohamed R.,Mohammed V University | Mohamed O.,Mohammed V University
2nd International Conference on Innovative Computing Technology, INTECH 2012 | Year: 2012

In the standard AODV protocol, the shortest path is always selected. But this shortest path is the easiest broken one. In this paper, we propose an improvement of AODV protocol called AMAODV(Adaptative Mobility aware AODV). This protocol is based on considering the distance and relative velocity between each node and one hop neighbor. Which permits to avoid losing route. Through the simulation, it is confirmed that this improvement has higher package delivery fraction than basic AODV protocol. © 2012 IEEE.


Fdili O.A.,Mohammed V University | Fakhri Y.,Mohammed V University | Fakhri Y.,University IbnTofail | Aboutajdine D.,Mohammed V University
International Journal of Communication Networks and Information Security | Year: 2012

Wireless Sensor Networks (WSNs) are increasingly used and will certainly be part of our everyday lives. Many routing protocols were designed with respect to WSNs capacities to allow the achievement of numerous applications. One of the not well investigated areas in WSNs is the queue management issue. The purpose of this paper is to present an analysis of the impact of queue buffer size awareness on the Quality of Service (QoS) of real-time (RT) routing protocols in WSNs. The studied protocols are SPEED and its extension Multipath Multi-speed (MMSPEED). SPEED protocol yields RT routing for only one class of traffic, by maintaining a desired packet's progression speed (PS) across the WSN. On the other hand, MMSPEED protocol extends SPEED by offering multiple types of service to packets according to their class of traffic. The main contribution is that the routing decision is made on neighbors' available queue buffer size at each level in addition to PS metric. Simulations have proved that the two metrics are compatible, the routing decision is efficient in case of single service protocol and multiservice one and improves two QoS domains namely timeliness and reliability.


Ahmed B.,Mohammed V University | Ouadoudi Z.,Mohammed V University | Ouadoudi Z.,University Ibntofail | Mohamed R.,Mohammed V University | Mohamed O.,Mohammed V University
Proceedings of 2012 International Conference on Multimedia Computing and Systems, ICMCS 2012 | Year: 2012

Heterogeneous Mobile Ad-hoc Networks (MANETs) are composed of nodes with different transmission range. Due to the difference of transmission range and relative velocity for network nodes, the link between two nodes can or will be unidirectional. In the standard AODV protocol, the shortest path is always selected. But this shortest path is the easiest broken one. In this paper, we propose an improvement of AODV protocol called H-MAODV(heterogeneity and Mobility aware AODV). This protocol is based on considering the distance and relative velocity between each node and one hop neighbor. Which permits to avoid losing route. Through the simulation, it is confirmed that this improvement has higher package delivery fraction than basic AODV protocol. © 2012 IEEE.


Berradi M.,University IbnTofail | Essamri A.,University IbnTofail | El Harfi A.,University IbnTofail
Journal of Materials and Environmental Science | Year: 2016

During the present study, we conducted a research which is to develop an organic and asymmetric membrane polysulfonePSU UDEL P1700 by the technique of phase inversion, and to apply this film active supported in the discoloration of wastewater loaded with templates of vat dyes; indigo and sulphur black, while using and optimizing the treatment of effluents from textile finishing by ultrafiltration. According to the optimization and characterization of the hydrodynamic conditions of the membrane obtained, we purified directly the colored solutions models of water. The results of the optimization of the membranes showed that the synthesized membranewith a more efficient mechanical and hydraulic properties in percentage by weight of polymer PSU is of the order of 12%on the one hand, and those obtained for the purification of water colored by ultrafiltration have showed that the rate of discoloration is calculated in the range of 80.36% forthe indigo and of the order of 60.78%for the blacksulphur to the other. © 2016.

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