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Search Results: 1 - 10 of 162 matches for " Ibrahima Berete "
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Extradural Hemangioma of Thoracic Spine  [PDF]
Mohamed Aggouri, Ibrahima Berete, Meryem Himmich, Khalid Chakour, Chaoui Mohamed El Faiz Chaoui
Open Journal of Modern Neurosurgery (OJMN) , 2014, DOI: 10.4236/ojmn.2014.44033
Abstract: A 50-year-old woman presented with mid-thoracic backache and progressive, spastic, paraparesis for 3 months. Magnetic resonance imaging revealed an epidural mass without bone lesion at the level of thoracic vertebrae (T7, T8 and T9). The mass had a paraspinal invasion. The spinal cord was compressed ventrally. The lesion was totally excised through an anterolateral transthoracic approach. Histopathological examination revealed a cavernous hemangioma. The patient improved dramatically after the excision of the lesion. We report this case for its rarity.
Fasciitis on Abdominal Craniectomy Implantation  [PDF]
Pierlesky Elion Ossibi, Salima Rezzouk, Ibrahima Berete, KarimIbn Majdoub, Imane Toughrai, Said Ait Laalim, Abdelmalek Ousadden, Mohammed Chaoui El Faiz, Khalid Mazaz, Khalid Ait Taleb
Surgical Science (SS) , 2014, DOI: 10.4236/ss.2014.510073
Abstract: Necrotizing fasciitis is an infection of the skin and deep subcutaneous tissue. It is caused by bacteria (group A streptococcus), but may also be idiopathic ora secondary complication of surgery. We report a case of necrotizing fasciitis of the abdominal wall fostering a decompressive cranial flap in a 39-year-old patient.
Contribution of Surgery in the Care of Intracranial Hematomas in Developing Countries: Case Series of 30 Patients in Abidjan  [PDF]
Abd El Kader Moumouni, Romuald Kouitcheu, Essohanam Kpelao, Abdoulaye Ouattara, Moussa Diallo, Dabou Abiba Tamou Tabe, Ibrahima Berete, Daniel Memia Zolo, Pascal Compaore, Aderehime Haidara
Open Journal of Modern Neurosurgery (OJMN) , 2018, DOI: 10.4236/ojmn.2018.84036
Abstract: Intracranial hematomas, whatever its causes, represent an important disabling, and dreaded adult’s lesion. This brain’s condition has not well been studied in developing countries. The aim of our study is to overview the management of intracaranial hematomas in Abidjan. It is a retrospective analytical and descriptive study, involving patients who had been admitted and monitored by neurosurgeons for intracranial hematomas, documented in brain CT scan and had been operated on from 1 January 2007 to December 31, 2009 in Abidjan. These 30 patients were 23 men and 7 women. The average age was 58.6 years old. 90% of the patients were admitted with wakefulness issues. Half had a Glasgow score of less than 8. The brain scanner allowed identification of an intraparenchymal hematoma associated or not with a cerebral ventricle contamination in 28 patients. There were 18 external ventricle derivations with or without decompressive craniectomy and 12 independent decompressive craniectomy. The evolution was marked by 20 deaths. 10 patients (33.3%) survived. Among the survivors, the first attack and arterial hypertension were the only illness before the attack. None had blood in the membranes and all had Glasgow scores greater than or equal to 9 at admission. Around 7 out of 10 patients were operated on during the first 48 hours. The operative indications of intracranial hematomas are still the subject of controversy. By basing itself on criteria and rigorous clinical and neuroimaging selection, surgery could eventually contribute to the management of this pathology which has become very frequent in Africa.
Modified atomic orbital theory applied to the calculation of high-lying 2(K,T)n±1,3P° rydberg series of he-like ions  [PDF]
Ibrahima Sakho
Natural Science (NS) , 2012, DOI: 10.4236/ns.2012.41011
Abstract: The 2(1,0)n-1P°, 2(1,0)n +3P°, 2(0,1)n+1P°, and 2(0,1)n-3P° intershell Rydberg series of the helium-like ions are investigated in the framework of the modified Atomic Orbital Theory (MAOT). High-lying energy resonances of He and excitation energy of the he- lium-like Li+ up to n = 10 are tabulated. In addition, total energy positions for low-lying states (n<4) of the heliumisoelectronic sequence with Z = 2, 3, ...,10 are also presented. All the current results agreed well with the published values. The data listed in this paper may be useful guideline for future experimental and theoretical studies in high-lying 1,3P° autoionizing states of two-electron systems.
Controllability Approach for a Fluid Structure Interaction Problem  [PDF]
Ibrahima Mbaye
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.33034
Abstract: The present paper presents a new method to solve fluid structure interaction problem. Our computational method is based on controllability approach. Given a target structural displacement we will find a control steering the displacement of the structure u to . We need to define a payoff functional (J): where u solves the structure equation for the control and is a fixed value. Our aim is to find a control which minimizes the payoff criterion. And therefore we find u the beam displacement, v the velocity of the fluid and p the pressure of the fluid.
The African Single Currency: Putting in Place the Missing Link for a Complete Regional Integration Scheme in Africa  [PDF]
Ibrahima Thione Diop
Modern Economy (ME) , 2015, DOI: 10.4236/me.2015.610103
Abstract: Facing the threat of globalization, Africa is more than ever forced to lift as soon as possible the factors blocking the integration process which is too long deadlocked. Indeed, Africa remains on the margins of world trade, FDI flows and the ICT revolution, while suffering the brunt of the repercussions of globalization, including the food crisis. This article is a contribution to the issue of economic integration of African countries through the introduction of a single currency. However, the latter seems to be a decisive contribution to permanently overcome the issue of borders but also the divisions in terms of language differences. The main conclusion from this research is that we need to overcome the many constraints faced by the advent of the single currency, which are essentially institutional, but also economic.
Assessment of the Impact of WAEMU Common External Tariff (CET) in Senegal  [PDF]
Ibrahima Thione Diop
Modern Economy (ME) , 2015, DOI: 10.4236/me.2015.612115
Abstract: The adoption of the common external tariff (CET) by ECOWAS member countries is a further step towards the realization of the Customs Union and to the harmonization of trade programs. Senegal has joined the CET in 2000 to boost its trade with neighboring countries and the rest of the world. At the WAEMU level, the CET establishes a delicate equilibrium between member countries with divergent interests on certain products. However, it is criticized for being unable to provide sufficient protection to production branches and promote the emergence of a real community market. A key challenge of the ECOWAS-CET is to manage to reconcile the concerns of countries that require modifications in some elements of the WAEMU-CET. It is thus important to assess the implementation of the WAEMU-CET in Senegal, to bring out its strengths and weaknesses, in order to better tackle the negotiations on the ECOWAS-CET. The main objective of this study is to engage in such an exercise by focusing on the impact of the CET on public finance. In this paper, we examine the impact of recently implemented Common External Tariff (CET) by ECOWAS on the Senegalese economy. Using a partial equilibrium framework, we have undertaken simulations of CET application on key macroeconomic variables. Our results suggest very strong negative impact on fiscal revenue, inflation, but a dramatic change in tax structure, mainstreaming consumption taxes and VAT at the detriment of collected duties. Our conclusion calls for structural reforms beyond external tariff alignment in order to increase competitiveness and boost exports. A forecasting and simulation model has been developed to measure the impact of the CET on some key macroeconomic variables. Simulations show that a decrease in customs duty rate had a depressive effect on fiscal revenues. The estimated decline in fiscal revenues amounted to nearly CFA F 41 billion and 51.75 billion respectively in 2007 and 2013. However, overall, the positive effect of VAT and consumption taxes outweighs the depressive effect of lower customs duties on fiscal revenues. Thus, the overall impact of the reforms on total fiscal revenues is positive and amounts to 63.78 billion in 2007 and is expected to rise to 79.9 billion in 2013. Regarding price simulations, the findings show that the increase of indirect taxation subsequent to WAEMU reforms led to inflation. Compared to the baseline (unchanged fiscal legislation), consumer price indices and the manufacturing sector price indices grew faster. This upward effect increased over time. In terms of consumer prices,
Method of Successive Approximations for a Fluid Structure Interaction Problem  [PDF]
Aliou Gueye Sow, Ibrahima Mbaye
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.515223

In this paper, we present a method for solving coupled problem. This method is mainly based on the successive approximations method. The external force acting on the structure is replaced by λ = p (x1, H + u (x1, λ)). Then we have a nonlinear equation of unknown λ to solve by successive approximations method. By this method, we obtain easily the analytic expression of the displacement. In addition, good results are obtained with only a few iterations.

On Integer Sequences Related to a Memorization Technique
Ibrahima Faye
Journal of Applied Sciences , 2011,
Abstract: This research studies the properties of integer sequences related to a memorization technique. The fractal property of the main sequence is investigated as well as the formula for the related sequences. Using a simple description, the self similarity of the main sequence is proved and its relation with known sequences is also shown.
Spatial Distribution of Cordex Regional Climate Models Biases over West Africa  [PDF]
Alioune Badara Sarr, Moctar Camara, Ibrahima Diba
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.69081
Abstract: The objective of this work is to analyze the spatial distribution of biases of nine (9) regional climate models (RCMs) and their ensemble average used under the framework of COordinated Regional climate Downscaling EXperiment (CORDEX) project over West Africa during the summer period. We assessed the ability of RCMs to represent adequately West African summer rainfall by analyzing some statistical parameters such as the relative bias, the standard deviation, the root mean square error (RMSE) and the correlation coefficient between observation data (GPCP used as reference) and regional climate models outputs. We first analyzed the relative bias between GPCP climatology and the other available observed data (CRU, CMAP, UDEL, GPCC, TRMM and their ensemble mean). This analysis highlights the big uncertainty on the quality of these observed rainfall data over West Africa which may be largely due to the rarity ofin situmeasurement data over this region. The statistical analysis with respect to GPCP rainfall shows the presence of large relative bias values over most part of West Africa for engaged RCMs. However their ensemble mean outperforms individual RCMs by exhibiting the weakest relative change. The RMSE values are weak over West Africa except over and off the Guinea highlands for RCMs and the Era-interim reanalysis. The spatial distribution of the coefficient of correlation between the observation data and RCMs shows that all models (except HIRHAM) present positive values over the Northern Sahel and the Gulf of Guinea. The model of the DMI exhibits the weakest values of correlation coefficient. This study shows that RCMs simulate West African climate in a satisfactory way despite the fact that they exhibit systematic biases.
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