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Casablanca, Morocco

Fahsi A.,Hassan II University
Nonlinear Dynamics

Analytical approximation of heteroclinic bifurcation in a 3:1 subharmonic resonance is given in this paper. The system we consider that produces this bifurcation is a harmonically forced and self-excited nonlinear oscillator. This bifurcation mechanism, resulting from the disappearance of a stable slow flow limit cycle at the bifurcation point, gives rise to a synchronization phenomenon near the 3:1 resonance. The analytical approach used in this study is based on the collision criterion between the slow flow limit cycle and the three saddles involved in the bifurcation. The amplitudes of the 3:1 subharmonic response and of the slow flow limit cycle are approximated and the collision criterion is applied leading to an explicit analytical condition of heteroclinic connection. Numerical simulations are performed and compared to the analytical finding for validation. © 2010 Springer Science+Business Media B.V. Source

Ouzir M.,Hassan II University
Aggression and Violent Behavior

Impulsivity has been repeatedly identified as a major problem in schizophrenia. The literature revealed several ways of defining and conceptualizing impulsivity as well as a variety of measures and an analysis of the consequences of impulsivity. Thus, we review the lack of agreement in the conceptualization and measurement of impulsivity. We also review the latest evidence that impulsivity may have an important role in the etiology of substance use, aggression, violence, and suicide in schizophrenia. In addition, we outline the recent findings in neuroimaging research to elucidating the neurobiological deficits underlying pathological impulsivity in schizophrenia. © 2012 Elsevier Ltd. Source

In the present study,we investigate the unsteady peristaltic transport of a viscoelastic fluid with fractional Burgers' model in an inclined tube. We suppose that the viscosity is variable in the radial direction. This analysis has been carried out under low Reynolds number and long-wavelength approximations. An analytical solution to the problem is obtained using a fractional calculus approach. Figures are plotted to show the effects of angle of inclination, Reynolds number, Froude number, material constants, fractional parameters, parameter of viscosity and amplitude ratio on the pressure gradient, pressure rise, friction force, axial velocity and on the mechanical efficiency. © 2015 Hassan Rachid, licensee De Gruyter Open. Source

Benjelloun E.B.,Hassan II University
Updates in surgery

Conventional treatment of anal abscess by a simple drainage continues to be routine in many centers despite retrospective and randomized data showing that primary fistulotomy at the time of abscess drainage is safe and efficient. The purpose of this study is to report the long-term results of fistulotomy in the treatment of anal abscesses. This is a prospective nonrandomized study of 165 consecutive patients treated for anal abscess in University Hospital Hassan II, Fez, Morocco, between January 2005 and December 2010. Altogether 102 patients were eligible to be included in the study. Among them, 52 were treated by a simple drainage and 50 by drainage with fistulotomy. The results were analyzed in terms of recurrence and incontinence after a median follow-up of 3.2 years (range 2-6 years). The groups were comparable in terms of age, gender distribution, type and size of abscess. The recurrence rate after surgery was significantly higher in the group treated by drainage alone (88 %) compared to other group treated by drainage and fistulotomy (4, 8 %) (p < 0.0001). However, there was a tendency to a higher risk of fecal incontinence in the fistulotomy group (5 % vs 1 %), although this difference was not significant (p = 0.27). In the group treated by drainage and fistulotomy, high fistula tract patients are more prone to develop incontinence and recurrence, mainly within the first year. A long-term follow-up seems not to influence the results of fistulotomy group. These findings confirm that fistulotomy is an efficient and safe treatment of anal abscess with good long-term results. An exception is a high fistula, where fistulotomy may be associated with a risk of recurrence and incontinence. Source

Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: SPA.2013.1.1-06;SPA.2013.3.1-01 | Award Amount: 2.51M | Year: 2013

The objective of SAFI project is to exploit Earth Observation resources to support fishery and aquaculture industries in marine coastal regions. The service, based on additive value brought by a network of SMEs, is adapted to each category of targeted users, and aims to realize the following points by making the best use of emerging EO products: 1-Develop a service to assist aquaculture deployment (optimization of cages location w.r.t. to environmental and ecological context) and environmental monitoring during operations 2- Develop a service to support fishery by providing indicators of recruitments, abundances, and shell/fish locations (and its variability due to climate change) 3-Set up a network of SMEs at different levels of expertise (and EO awareness) required by the service and to build a consistent and marketable offer. 4-Evaluate the capacity of exportation and acceptance of this service 5-Foster the use of sentinel 2 and sentinel 3 data The project will finally lead to the development, deployment and evaluation of an integrated web-GIS, broadcasting SAFI indicators to the various user concerned (industrials, public administrations in charge of fishery/aquaculture planning, EO service providers, great public) that will be feed by a service of EO high level data processing. SAFI stands for Service to Aquaculture and Fishery Industry.

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