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Search Results: 1 - 10 of 410 matches for " Lamine Traore "
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Assessment of Climate Trends and Land Cover/Use Dynamics within the Somone River Basin, Senegal  [PDF]
Ndeye Yacine Barry, Vieux Boukhaly Traore, Mamadou Lamine Ndiaye, Osemwegie Isimemen, Hauhouot Celestin, Bienvenu Sambou
American Journal of Climate Change (AJCC) , 2017, DOI: 10.4236/ajcc.2017.63026
Abstract: This study was undertaken mainly to 1) investigate temporal trends in annual rainfall and temperature; 2) identify discontinuities in the time series; and 3) assess the Land Use/Land Cover Change (LULC) in the Somone coastal lagoon, within the river basin. The study examined temporal trends in rainfall (1931-2016) and temperature (1961-2016) datasets of Somone river basin, and breaks in time series using Mann-Kendall non-parametric test and other suitable statistical tools. Temporal evolution in LULC was assessed for the years 1954, 1978, 2003 and 2016. Analysis indicates a significant decreasing trend in precipitation over the basin. These trends are much more pronounced for minimum and average rainfall than for maximum and annual amplitudes. Contrary to precipitation, surface air temperature shows a significant increasing trend for its minimum and averages, and a decreasing trend for its maximum and amplitudes. A significant break in precipitation was observed in 1958, while surface air temperature presents much longer breaks within the years 1975 and 1977, and 1991 and 1993. A more direct implication of climate change on LULC patterns is increased in unproductive salt pans (Sabkhas). Increase in Sabkhas gave rise to conversion of forest lands to agricultural lands of local farmers in search for fertile soils to cater for the food needs of a growing population. Otherwise, the development of the settlements, favored by the tourism activity and agriculture crisis, is another cause of croplands decreasing. The findings of the present research clearly indicate that the impacts of climate change are exacerbated by rapid urbanization in the basin.
Expending the Paradigm: Active Surveillance for Intermediate Risk Prostate Cancer  [PDF]
Mohamed Jalloh, Mamadou Tieoule Traore, Thierno Amadou Diallo, Issa Labou, Lamine Niang, Serigne Magueye Gueye
Open Journal of Urology (OJU) , 2018, DOI: 10.4236/oju.2018.88027
Abstract: Prostate cancer is the leading male cancer worldwide. There remains a controversy as to which patients have indolent disease and which patients present an aggressive disease needing treatment with intent to cure. Because of quality of life impairment associated with treatment by radiation or surgery, active surveillance (AS) is a valid management option to avoid or differ aggressive treatment. Traditionally, AS was reserved for men with low risk prostate cancer, however intermediate risk patients are more and more found in AS cohorts. The aim of this review is to describe the place of AS in intermediate risk patients and the perspectives offered by such a treatment modality.
Irradiation Energy Effect on a Silicon Solar Cell: Maximum Power Point Determination  [PDF]
Mamadou Lamine Ba, Hawa Ly Diallo, Hamet Yoro Ba, Youssou Traore, Ibrahima Diatta, Marcel Sitor Diouf, Mamadou Wade, Gregoire Sissoko
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.912135
Abstract: The aim of this study is to determinate the electrical parameters of a white biased silicon solar cell submitted to an irradiation energy of particles (protons, helium, electrons and heavy ions). A theoretical study of the influence of irradiation energy on the photocurrent density, the photovoltage, the maximum power, as well as the maximum efficiency of the solar cell is presented through a resolution of the continuity equation relative to excess minority carrier. Then the expressions of the photocurrent density Jph, the photovoltage Vph, and the excess minority carrier recombination velocity at the back side Sb are established dependent of irradiation parameters p, Kl respectively irradiation flux and intensity. In this work, we propose a method for determining the recombination velocity of the excess minority carrier at the junction Sfmax corresponding to the maximum power point delivered by the photovoltaic generator under the influence of the irradiation. It is then obtained by calculating the derivative of the power with respect to the excess minority carrier recombination velocity Sf at the junction emitter-base. A transcendental equation solution is deduced as eigenvalue, leading to the junction recombination velocity of excess minority carrier and also yields the solar cell maximum conversion efficiency.
Complications of Sinusitis: About 9 Cases in the Ear Nose & Throat (ENT) Department of the University Hospital Gabriel Touré in Bamako  [PDF]
Kadidiatou Doumbia-Singare, Abdoul Aziz Diakite, Sidiki N’Dao, Samba Karim Timbo, Youssouf Sogoba, Drissa Kanikomo, Boubacary Guindo, Siaka Soumaoro, Lamine Traore, Fatogoma Kone, Fatou Sylla, Mohamed Keita, Alhousseini Ag Mohamed
Surgical Science (SS) , 2016, DOI: 10.4236/ss.2016.71003
Abstract: Objective: This study aims to analyze clinical, paraclinical and therapeutic aspects of sinusitis complications in the Otorhinolaryngology department at the teaching hospital of Gabriel Toure in Bamako. Materials and methods: This descriptive and longitudinal study was conducted on 12 months from March 2012 to February 2013 in 9 cases of sinusitis complications in the department of Otorhinolaryngology at the University Hospital Gabriel Toure in Bamako. Results: The average age of patients was 22.7 years; a median of 19 years within 6 men and 3 women with almost 12.9 days of care seeking duration. The factors of risky were the use of nonsteroid anti-inflammatory drugs NSAID (4 cases), maxillofacial trauma (1 case) and HIV (1 case). Facial pain was the major symptom, such as frontal oedema, rhinorrhea with pus shedding and nasal obstruction. Computer tomography was used for complications specification. Frontal sinusitis was the most encountered with subperiosteal abscess (44.4%). Streptococcus pneumoniae was identified in 3 cases. Medical treatment associated to surgery was conducted on 7 patients. Two cases of death have been registered. Conclusion: The complicated sinusitis is an emergency and dangerous disease requiring specific care by a multidisciplinary staff. Much of complications are commonly encountered despite the antibiotic era.
Prevalence of HIV in Hospitalized Patients with Venous Thrombosis of the Lower Limbs to the Abidjan Cardiological Institute  [PDF]
Traore Fatoumata
World Journal of Cardiovascular Diseases (WJCD) , 2017, DOI: 10.4236/wjcd.2017.712042
Abstract: Background: The diagnosis of deep vein thrombosis (DVT) requires an etiological research of HIV infection. The objective was to identify the characteristics of patients with DVT of limbs without other risk factors in our context. Methods: We performed a comparative retrospective study from January 2005 to December 2012. We identified 162 cases of patients hospitalized in Medicine Department of Institute of Cardiology of Abidjan with 124 HIV-negative and 38 HIV positive patients. Results: DVT is more common in HIV positive young patients (57.8 ± 15.6 years vs 39.3 ± 10.6 years, p = 0.0001). The traditional risk factors were found in HIV negative patients. HIV positive patients had no predisposing factor for thrombosis. The ankle-femoral popliteal location (29% vs 73.7% p = 0.05) was most frequent in HIV positive patients. There was no significant difference in anticoagulant therapy: UFH (60.5% vs 52.6%; p > 0.05), LMWH (20.2% vs 7.9%; p > 0.05), AVK relay (99.2% vs 100%; p > 0.05) and general measures (elevation MI). (70.2% vs 65.8%; p > 0.05). None of the patients in both groups had worn stockings in hospitalization. The stockings were prescribed on discharge (70% vs 64.7%; p
AC Recombination Velocity in the Back Surface of a Lamella Silicon Solar Cell under Temperature  [PDF]
Youssou Traore, Ndeye Thiam, Moustapha Thiame, Amary Thiam, Mamadou Lamine Ba, Marcel Sitor Diouf, Ibrahima Diatta, Oulymata Mballo, El Hadji Sow, Mamadou Wade, Grégoire Sissoko
Journal of Modern Physics (JMP) , 2019, DOI: 10.4236/jmp.2019.1010082
Abstract: The ac recombination velocity of the excess minority carriers, in the back surface of a silicon solar cell with a vertical junction connected in series, is developed through Einstein’s law giving the diffusion coefficient of minority carriers according to temperature, through mobility. The frequency spectrum of both, amplitude and phase, are produced for the diffusion coefficient and the recombination velocity in the rear face, in order to identify the parameters of equivalent electric models.
Surface Recombination Concept as Applied to Determinate Silicon Solar Cell Base Optimum Thickness with Doping Level Effect  [PDF]
Masse Samba Diop, Hamet Yoro Ba, Ndeye Thiam, Ibrahima Diatta, Youssou Traore, Mamadou Lamine Ba, El Hadji Sow, Oulymata Mballo, Grégoire Sissoko
World Journal of Condensed Matter Physics (WJCMP) , 2019, DOI: 10.4236/wjcmp.2019.94008
Abstract: New expressions of back surface recombination of excess minority carriers in the base of silicon solar are expressed dependent on both, the thickness and the diffusion coefficient which is in relationship with the doping rate. The optimum thickness thus obtained from the base of the solar cell allows the saving of the amount of material needed in its manufacture without reducing its efficiency.
Base Thickness Optimization of a (n+-p-p+) Silicon Solar Cell in Static Mode under Irradiation of Charged Particles  [PDF]
Mamadou Lamine Ba, Ndeye Thiam, Moustapha Thiame, Youssou Traore, Masse Samba Diop, Mamour Ba, Cheikh Tidiane Sarr, Mamadou Wade, Gregoire Sissoko
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2019, DOI: 10.4236/jemaa.2019.1110012
Abstract: In this work, we propose a method to determinate the optimum thickness of a monofacial silicon solar cell under irradiation. The expressions of back surface recombination velocity depending the damage coefficient (kl) and irradiation energy (øp) are established. From their plots, base optimum thickness is deduced from the intercept points of the curves. The short-circuit currents Jsc0 and Jsc1 corresponding to the recombination velocity Sb0 and Sb1 are determinated and a correlation between the irradiation energy, the damage coefficient and optimum thickness of the base is established.
Influence of Temperature and Frequency on Minority Carrier Diffusion Coefficient in a Silicon Solar Cell under Magnetic Field  [PDF]
Seydina Diouf, Mor Ndiaye, Ndeye Thiam, Youssou Traore, Mamadou Lamine Ba, Ibrahima Diatta, Marcel Sitor Diouf, Oulimata Mballo, Amary Thiam, Ibrahima Ly, Grégoire Sissoko
Energy and Power Engineering (EPE) , 2019, DOI: 10.4236/epe.2019.1110023
Abstract: In this study, the effects of temperature and frequency on minority carrier diffusion coefficient in silicon solar cell under a magnetic field are presented. Using two methods (analytic and graphical), the optimum temperature corresponding to maximum diffusion coefficient is determined versus cyclotronic frequency and magnetic field.
Shunt Resistance Determination in a Silicon Solar Cell: Effect of Flow Irradiation Energy and Base Thickness  [PDF]
Ousmane Sow, Mamadou Lamine Ba, Hamet Yoro Ba, Mohamed Abderrahim Ould El Moujtaba, Youssou Traore, Masse Samba Diop, Habiboullah Lemrabott, Mamadou Wade, Grégoire Sissoko
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2019, DOI: 10.4236/jemaa.2019.1112014
Abstract: The concept of the recombination of the minority carrier’s recombination velocity at the junction and in the rear, is used for determination, optimum thickness and then shunt resistance in the base of the silicon solar cell, maintained in steady state and under energy from the irradiation flow of charged particles. Resistance shunt is obtained and modeled through a relationship expressed according to the flow and energy of irradiation imposed on the solar cell.
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