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Zambia’s Copperbelt Area and Copper Mining: A Review

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Journal of Geoscience and Environment Protection 2022年第3期10卷 67-75页

作者： Ningabo Aurélien sanoh ousmane Regean Pumulo Pitiya School of Resources and Safety Engineering Central South University Changsha China School of Geoscience and Info-Physics Central South University Changsha China

Zambia’s economy is fueled by copper production, which is one of the country’s most important industries. In terms of copper output, Zambia has around five large open-pit mines and eight significant underground mines. Zambia’s Government owns a stake in some of these businesses. This article examines the economic, social, technological, and environmental ramifications of copper mining in the Copperbelt area of Zambia.

关键词： Copperbelt Copper Mining Economy Environment

Impact of the Mining Rights Allocation Process on the Sustainable Development of the Copper Mining Industry in Zambia

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Journal of Geoscience and Environment Protection 2022年第4期10卷 227-246页

作者： Ningabo Aurélien Jianhua Hu sanoh ousmane Brian Makuza Regean Pitiya School of Resources and Safety Engineering Central South University Changsha China School of Metallurgy and Environment Central South University Changsha China School of Geoscience and Info-Physics Central South University Changsha China

The limited character of minerals must be recognized in the development of mining activities, as well as the necessity to form bonds that allow mining advantages to be enjoyed long after natural resources have been consumed. Because mining activities have the potential to affect a wide variety of environmental entities and are of interest to a large range of stakeholder groups, the sector has a lot of room to improve its sustainability. According to studies, the economic advantages of copper mining operations in Zambia are not allocated equally among stakeholders in the process of granting mining rights to potential investors. This paper examines how the existing system of granting mining rights in Zambia impacts the distribution of economic gains among copper mining project stakeholders.

关键词： Zambia Mining Rights Stakeholder Sustainable Development Economic Benefits Environment

Analysis of the Energy and Environmental Sustainability of a Built Space System: The Case of Patte d’Oie University Campus in Ouagadougou

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Energy and Power Engineering 2024年第5期16卷 197-215页

作者： Daouda Sawadogo ousmane Coulibaly Xavier Chesneau Belkacem Zeghmati Laboratoire de Physique et de Chimie de l’ Environnement (LPCE) Department of Physics Universit&#233 Joseph KI-ZERBO Ouagadougou Burkina Faso Multidisciplinary Modeling and Simulation Laboratory (LAMPS) Mechanics and Energetics Group (GME) Universit&#233 Perpignan Via Domitia Perpignan France

The aim of this study was to carry out a dynamic simulation of the energy and environmental performance of a built space system, with a view to assessing its energy and environmental class. The use of a simulation and modeling tool, supported by various methodological references, formed the basis of our approach. Adopting a systemic perspective, we described the structural and functional aspects of the systems making up built spaces, as well as the associated energy flows. Our approach was also based on a typology, taking into account typical days, structural and functional configurations at different scales and angles of observation. The analysis tool we developed in Java was applied to the built space system of the Patte d’Oie university campus in Ouagadougou. Annual electricity consumption was measured at 124387.34 kWh, closely aligned with the average annual electricity bill (125224.31 kWh), with a maximum relative deviation of 1%, followed by a carbon emission balance of 58337.66 kg eq CO2 per year. This validation confirmed the effectiveness of our tool. In addition, following the analysis of electricity consumption using our tool, the university campus was classified in energy class B and environmental class C. These results will be based on the emission factors of the energy mix of the West African Economic and Monetary Union (WAEMU) territory, with particular emphasis on Burkina Faso.

关键词： Energy Function Energy Class Carbon Footprint Built Space Consumption Item Systemic Approach Typological Approach

Numerical Modelling of Coupled Heat and Mass Transfer in Porous Materials: Application to Cinder Block Bricks

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Open Journal of Applied Sciences 2024年第9期14卷 2360-2373页

作者： Benjamin Kiema ousmane Coulibaly Xavier Chesneau Belkacem Zeghmati Laboratory of Environmental Physics and Chemistry (LPCE) Department of Physics Joseph KI-ZERBO University Ouagadougou Burkina Faso Laboratory of Modelling Pluridisciplinary and simulation (LAMPS) University of Perpignan Via Domitia Perpignan France

In this work, we present numerical modelling of coupled heat and mass transfer within porous materials. Our study focuses on cinder block bricks generally used in building construction. The material is assumed to be placed in air. Moisture content and temperature have been chosen as the main transfer drivers and the equations governing these transfer drivers are based on the Luikov model. These equations are solved by an implicit finite difference scheme. A Fortran code associated with the Thomas algorithm was used to solve the equations. The results show that heat and mass transfer depend on the temperature of the air in contact with the material. As this air temperature rises, the temperature within the material increases, and more rapidly at the material surface. Also, thermal conductivity plays a very important role in the thermal conduction of building materials and influences heat and mass transfer in these materials. Materials with higher thermal conductivity diffuse more heat.

关键词： Numerical Modelling Coupled Transfer Building Materials Luikov Model Finite Differences

Contribution of Garcinia kola to the Productivity and Economic Profitability of the Community Agricultural Area of Kedougou: Financial and Comparative Analysis of Production Factors

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Journal of Agricultural Chemistry and Environment 2024年第1期13卷 54-66页

作者： Cheikh Sarr Ngor Ndour Abdoulaye Badji ousmane Ndiaye Hamet Diadhiou Laboratory of Agroforestry and Plant Production Assane Seck University of Ziguinchor Ziguinchor Senegal Enda ECOPOP/Tambacounda Regional Office Tambacounda Senegal Laboratory of Agriculture and Environmental Sciences National High School of Agriculture Thies Senegal Senegalese Institute of Agriculture Research Oceanographic Research Center of Dakar Thiaroye Dakar Senegal

Inland fishing predominates in the Kedougou region, which has no coastline. This type of fishing does not yet meet the local population’s demand for fish products. In response to this concern, a Community Agricultural Estate housing an integrated fish farm was set up in the commune of Bandafassi, in the village of Itato. Since its creation, this production unit has been faced with the problem of sourcing high-quality, low-cost, monosex male Oreochromis niloticus fry. In order to overcome this constraint, the present research focuses on the contribution of Garcinia kola to the productivity and economic profitability of the Itato farm. The aim of the research is to assess fish production in the experimental set-up and the production costs of tilapia in a controlled environment. The comparative study of the various production factors shows disparities only in the input factor, where scenarios 2 and 3 use additional products. These are 17-α-methytestosterone for scenario 2 and Garcinia kola for scenario 3. These products significantly interfere with fish production, with a fairly high mortality rate for scenario 2 (25% for two production cycles/ cohort2 (B5, B6, B7 and B8) treated with 17-α-methytestosterone). As for scenarios 1 and 3, mortalities are 5% with or without recourse to additional products (G. kola). In addition, average fish production for the three (03) scenarios is estimated at 28687.5 kg/2 cycles. It varies from one scenario to another, i.e. 30937.5 kg/2 cycles for scenarios 1 and 3 and 24187.5 kg/2 cycles for scenario 2. It is therefore higher in scenarios 1 and 3 than in scenario 2. This difference is due to the fairly large losses of individuals in scenario 2. Furthermore, the analysis of the profit and loss accounts for tilapia production varies from one scenario to another depending on the type of farm: 476 Franc CFA for scenario 1, 610 Franc CFA for scenario 2 and 472 Franc CFA for scenario 3 (F CFA = franc of the French Colonies of Africa). The Av

关键词： Farm Typology Economic Profitability 17-α-Methytestosterone Garcinia kola Fish Farming Tilapia

Fish Assemblage and Abundance Distribution in Nanji Islands Marine Nature Reserve in Relation to Season Change

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Journal of Agricultural Chemistry and Environment 2024年第1期13卷 13-32页

作者： Cheikh Sarr Cungen Yu ousmane Ndiaye Hamet Diadhiou Ngor Ndour Laboratory of Fishery Resources Zhejiang Ocean University Zhoushan China Laboratory of Agriculture and Environmental Sciences National High School of Agriculture Thies Senegal Senegalese Institute of Agriculture Research Oceanographic Research Center of Dakar Thiaroye Dakar Senegal Laboratory of Agroforestry and Plant Production Assane Seck University of Ziguinchor Ziguinchor Senegal

The fishing survey station located in the warm waters of the East China Sea is one of the abundant fishery resources of waters;with a large number of economic fish breeding grounds and economic juvenile feeding grounds. Several fish species according to this bottom trawl survey results which appear in the annual survey from winter to autumn give us a total of 58 species, which have appeared throughout the year. But the vast majority of species appears only in certain seasons, according to the sea fish survey and based on seasonal migratory species or species mainly small endemic species. The survey of fish is tropical and subtropical warm water species and warm temperate species, and the history of the area has several types of 397 different species. There are many reasons, in addition to recent years, human disturbance and adverse consequences of environmental changes brought about, but also with the relevant sampling methods and sampler time, the survey sampled only trawl based, from Ping yang Ocean and Fisheries Bureau, the waters are still other jobs method net, gill nets, fishing industry, etc. Survey results show that the type of fish in the summer (58 species) > spring (55 species) > winter (51 species) > autumn (42 species). The type of season was among spring to summer rose, summer to autumn decline. The survey found that in the reef area of the Nanji Islands, no one species of fish is the dominant species throughout the year (according to the dominant species, each species is dominant only in one season). From the dominant species turnover accounting for the four seasons, in winter it has 53.72% of the total biomass or annual biomass, spring it has 41.53% of the overall biomass, summer it has 31.85% and autumn it has 38.56% of total biomass. Visible, seasonal succession of dominant species of fish phenomenon is very obvious, especially in the spring and winter, summer transfers dominate species at this stage show the greatest change, but winter, the transf

关键词： Nanji Islands Species Composition Abundance Distribution Seasons

A Rare Etiology of a Life-Threatening Subdural Hematoma: Case Report and Literature Review

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Open Journal of Modern Neurosurgery 2024年第2期14卷 108-113页

作者： Ibrahim Dao Hassan Baallal Narcisse Mike Wendpuiré Ouédraogo ousmane Ouattara Department of Neurosurgery University Hospital Souro Sanou Nazi Boni University Bobo Dioulasso Burkina Faso Higher Institute of Health Sciences Nazi Boni University Bobo Dioulasso Burkina Faso Department of Neurosurgery Avicenne Military Teaching Hospital University Caddi Ayyad Marrakech Morocco

Background: Life-threatening subdural hematoma is commonly related to trauma and rarely revealed by neoplasm. Observation: We report a case of a 53-year-old suffering from mild headache and without a history of trauma, was admitted unconscious due to a subdural hematoma on radiological investigations. Beside the left subdural hematoma, there was also alytic lesion of the sphenoid wing and the temporal bone on the same side. An emergent removal of the subdural hematoma and an excision of the bone lesion were performed. Pathological examination diagnosed a cavernous hemangioma of the skull. The postoperative period was uneventful with a dramatic recovery of the patient. Conclusion: A quick worsening of a chronic headache, acute impairment of an uncommon headache deserve prompt investigation and emergent surgical management in case of intracranial hematoma. Any bone and dural abnormalities at the vicinity of a subdural hematoma require total excision with clean border and pathological examination.

关键词： Cavernous Hemangioma Subdural Hematoma Emergency Skull Surgery

Relevance of Medical Imaging in the Pre-Therapeutic Evaluation of Acute Intestinal Obstruction at CIMED

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Open Journal of Medical Imaging 2024年第1期14卷 31-41页

作者： Mamoudou Camara Aly Mampan Koundouno Siré Nabe Toumin Camara ousmane Aminata Bah Center for Medical Imaging Exploration and Diagnostics University of Conakry Conakry Guinea General Surgery Department of the Kankan Regional Hospital Kankan Guinea Ministry of Health and Public Hygiene Conakry Guinea General Medicine Department of the Siguiri Prefectural Hospital Siguiri Guinea CIRA Conakry Guinea

Objective: We initiated this work with the aim of studying the contribution of imaging in the diagnosis of acute intestinal obstruction at CIMED. Patients and methods: This was a prospective, descriptive and analytical study involving 96 patients collected at the radiology and medical imaging department of CIMED, from January 2022 to January 2023. Result: The age of our patients varied between 11 and 86 years with an average age of 36 years. There was a male predominance of 64.6% compared to 35.4% for women, i.e. a sex ratio of 1.82. The notion of previous surgery was found in 61.5% of our patients. Pain was present in all patients. Radiography of the ASP was performed in 89.6% of patients. It showed hydro-aerial levels in 96.5% of patients. Abdominopelvic CT was performed in 12 patients and made it possible to make the diagnosis of occlusion in all patients. The results of the positive diagnosis were concordant with those intraoperatively in 92% of cases. 8% of our patients, compared to the treatment, spontaneously resumed their transit, 91% benefited from surgical treatment and 1% died before surgery. The outcome was favorable in 80 patients or 83.3%, poor with death in 16 patients or 16.7% of cases. Conclusion: Acute intestinal obstruction remains a serious pathology for which ASP radiography often remains the only radiological examination performed urgently. However, abdominopelvic CT seems widely indicated thanks to its contribution both for the positive diagnosis and for the serious and etiological diagnoses. However, this imaging technique is largely underused in our practice due to its high cost and lack of availability.

关键词： Imaging Acute Intestinal Obstruction CIMED

Ultrasound in Ti-Rads Classification of Thyroid Nodules at the Marie Curie Medical Clinic

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Open Journal of Medical Imaging 2024年第3期14卷 114-122页

作者： Traore ousmane Diakité Siaka Sidibe Drissa Mansa N’Diaye Mamadou Diallo Aissata Bagayoko ousmane Lansenou Camara Nagnoumague Coulibaly Modibo Cisse Issa Dembele Mamadou Sidibe Assan Traore Keita Adama Diaman Department of Radiology and Medical Imaging The Marie Curie Medical Clinic Bamako Mali Department of Radiology and Medical Imaging The Point G University Hospital Center Bamako Mali Teaching Researcher at the Faculty of Medicine and Odontostomatology The University of Sciences and Technologies of Bamako/USSTB Bamako Mali Department of Radiology and Medical Imaging The Health Center of the Military Camp Bamako Mali Medical Office Didinitata Bamako Mali

Introduction: A thyroid nodule is a localized hypertrophy within the thyroid parenchyma. The aim of our study was to study the benefit of ultrasound in the Ti-rads classification of thyroid nodules. Methodology: This was a prospective study with a descriptive aim, with prospective collection, which took place over a period of 17 months at the “Marie Curie” medical clinic. The ultrasound machine used was a Voluson E8 from 2011 and the examinations were carried out by two radiologists and two experienced sonographers. The parameters studied were sociodemographic data;clinical data and ultrasound aspects of the Ti-rads classification in the management of nodules. Results: We collected 235 patients out of 738 patients referred to the service for a cervical ultrasound, i.e. a frequency of 31.84% of cases. There was a female predominance with 95.7% of cases and a sex ratio of 0.04. The average age of our patients was 50 years. We found on cervical ultrasound: Isthmo-lobar glandular hyperplasia in 99 patients, i.e. a frequency of 42.1%. The Ti-rads 3 classification was the most represented in 69.4% of cases. The benignity criterion represented 85.6% of cases in our patients and the malignancy criterion represented 14.4% of cases. Conclusion: The precise description of a thyroid nodule provided by ultrasound (Ti-rads) is essential in the management of nodules.

关键词： Ultrasound Thyroid Nodules Ti-Rads “Marie Curie” Medical Clinic