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Causes and Prognosis of Cases of Acute Obstructive Renal Failure Managed at the Donka National Hemodialysis Center

Open Journal of Urology（泌尿学期刊） 2024年第4期 217页

作者： Demba Cisse alpha Oumar Barry Morlaye Fatoumata Bangoura Alimou Diallo Mamadou Dian Bah Youssouf Keita Daouda Kanté Thierno Mamadou Oury Diallo Mamadou Bissiriou Bah Mamadou Diawo Bah Abdoulaye Bobo Diallo Oumar Raphiou Bah

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Frequency of the Cardiovascular Complications during the Chronic Renal Insufficiency with the Service of Nephrology of the National Hospital Donka

Open Journal of Nephrology（肾脏病） 2024年第2期 136页

作者： Amadou Yaya Diallo Mamadou Mouctar Diallo Mamadou Dian Barry Kadiatou Mamadou Bobo Barry Saikou Oumar Diallo Djenabou Diallo Soriba Bangoura Mamadou Malal Diallo Thierno Mamadou Oury Diallo Mohamed Lamine Kaba alpha Oumar Bah

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World Journal of Cardiovascular Diseases 2020年第7期10卷 425-431页

作者： Fousseny Diakité Mamadou Saliou Baldé Ibrahima Sory Barry Moussa Traoré alpha Boubacar Bah Fenela Mipimbou Mohamed Lamine Kaba alpha Oumar Bah Unit of Nephrology-Hemodialysis of the National Hospital Donka Guinea Unit of Cardiology of the National Hospital Ignace Deen Guinea

Introduction: Cardiovascular disease has become a major concern for the nephrologist as it is the leading cause of morbidity and mortality in patients with chronic kidney disease, and affects all stages of the disease, including the earliest stages of the disease. The goal of this work was to determine the frequency of cardiovascular complications during chronic kidney failure. Patients and methods: This was a six-month, descriptive cross-sectional study from March 01 to August 31, 2018. It covered all patients with chronic kidney disease hospitalized in the ward during the study period. Included were all chronic kidney failure patients with at least one cardiac and/or vascular complication diagnosed either on clinical examination, and/or paraclinical examination (Electrocardiogram or cardiac ultrasound, vessel echodoppler, scan). Results: During the study period, 84 out of 378 patients or 22.22% had at least one cardiovascular complication. Cardiovascular complications were hypertrophy of the left ventricle with 49/84 (44 at Electrocardiogram and 5 at cardiac echodoppler), valvulopathy with 33.33%, stroke with 50% of cases, obliterating arterial disease of the lower limbs 25%, hypokinetic dilated cardiomyopathy with 9/36 cases and pericarditis with 2/36. Conclusion: Cardiovascular complications affect both sexes and all ages. They were dominated by enlarged left ventricle, valvulopathy and dila

关键词： Cardiovascular Complications Chronic Kidney Failure Donka Conakry

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悬浮泥沙的计算机特征提取和分类

自动化学报 1989年第2期15卷 149-155页

作者：张欣恽才兴 alpha机图象处理组华东师范大学河口海岸研究所中国科学院空间中心

本文提出了一套适应于小型图象处理设备的信息提取,聚类分析等悬浮泥沙处理方法,它简而易行,降低了处理成本.其基本思想,特别是通过分级聚类将多维问题近似地化简为一维问题,可同样地用于其它各种应用问题.文章最后简要报告了一些应用结果.

关键词：悬浮泥沙图象处理系统计算机应用

Management of Vulnating Esophageal Foreign Bodies in Burkina Faso

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Linear and Nonlinear Stokes Waves Theory: Numerical Hydrodynamic and Energy Studies

International Journal of Otolaryngology and Head & Neck Surgery（耳鼻喉） 2024年第2期 135页

作者： Ibrahima Diallo Aboubacar Gouéta Alseny Camara Assoumi Anatou Biga Mama Brigitte Ouoba Edi Emmanuel Martial Nao MoustaphaSérémé Bertin Priva Ouédraogo Yvette Marie Chantal Gyébré Abdoulaye Keita alpha Oumar Diallo

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Open Journal of Fluid Dynamics 2023年第1期13卷 61-79页

作者： alpha Malick Ndiaye Fadel Diop Samba Dia Cheikh Mbow Laboratoire de Mécanique des Fluides et Transferts Département de Physique Faculté des Sciences et Techniques Université Cheikh Anta Diop (UCAD) Dakar Sénégal

The increase of wave energy in electricity production is an objective shared by many countries to meet growing demand and global warming. To analyze devices capable of converting the energy of sea waves into electrical energy, it is important to master the various theories of gravity waves and generation. We will in our work consider a numerical waves tank for an amplitude A=0.5, a wavelength λ=0.25 , an average height He=10 and a Froude number fixed at 1 × 105. Numerical wave channel analysis is used to reproduce the natural phenomenon of wave propagation in an experimental model. Wave makers are usually used to generate waves in the channel. In theory, the influence of an incident wave can be considered, as in the case of our study. In this study, the evolution of the hydrodynamic parameters and the energy transported in one wavelength can be determined by calculation. A change of variable will be done in this work to facilitate the writing of the boundary conditions at the free surface and at the bottom. The nonlinear Stokes theory will be studied in this case in order to provide hydrodynamic solutions through the Navier-Stokes equations to finally deduce the energetic results. To do this, the finite difference method will be used for the hydrodynamic results such as the velocity potential and the free surface elevation and the trapezium method of Newton for the energetic results. Thus, we will determine the energetic potential according to the decrease in the slope of the tank. To do this, we will take as values of beta representing the inverse of the slope of the tank, β=100, β=105, β=110 and β=105. .

关键词： Waves Tank Energy Waves Gravity Waves Navier-Stokes Numerical Nonlinear Stokes Theory

Effect of Palm Oil Biodiesel Blends on Engine Emission and Performance Characteristics in an Internal Combustion Engine

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Open Journal of Energy Efficiency 2023年第1期12卷 13-24页

作者： alpha Chukwumela Ajie Mohammed Moore Ojapah Endurance Ogheneruona Diemuodeke Department of Mechanical Engineering University of Port Harcourt Port Harcourt Nigeria

Increasing global environmental issues and depleting fossil fuel reserves has necessitated the need for alternative and sustainable fuel. In this paper, the effects of biodiesel and its blend on engine emission and performance characteristics in an internal combustion engine were analyzed. Biodiesel derived from the transesterification of raw palm oil was blended with diesel fuel at different proportions designated as PO5 (5% Biodiesel and 95% Diesel), PO10 (10% Biodiesel and 90% Diesel), PO15 (15% Biodiesel and 85% Diesel), PO20 (20% Biodiesel and 80% Diesel), PO50 (50% Biodiesel and 50% Diesel), PO85 (85% Biodiesel and 15% Diesel), and PO100 (100% Biodiesel). A Lombardini 2-cylinder, four-stroke direct injection diesel engine with a compression ratio of 22.8 was developed using Ricardo Wave software in which diesel, palm oil biodiesel blends and pure biodiesel are used in the model, and the obtained results were analysed and presented. The simulation was done under varying engine speeds of 1200 rpm to 3200 rpm at full load condition. Biodiesel and its blends are more environment-friendly and non-toxic when compared to diesel fuel;it also improves the mechanical efficiency of the engines, and above all can also lead to a reduction in poverty among rural dwellers. The obtained results showed that brake specific fuel consumption and brake thermal efficiency increased with palm oil biodiesel blends as compared to diesel fuel which might be a result of biodiesel’s lower heating value, and the increase in thermal energy may be a result of the oxygenation of the biodiesel blend as compared to pure diesel. In terms of brake torque, palm oil biodiesel blends were lesser than diesel fuel. The CO, HC, and NOx emissions of palm oil biodiesel blends decreased significantly compared to that of pure diesel. From this study, palm oil biodiesel emits lesser emissions than diesel fuel and its performance characteristics are similar to diesel fuel. Therefore, palm oil bio

关键词： Diesel Engine Biodiesel Palm Oil Biodiesel Engine Performance Emissions

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跨文化团队中的人力资源管理

跨文化团队中的人力资源管理

作者： DODO alpha MAIMOUNA（莫娜）南昌大学

学位级别：硕士

在经济全球的今天,企业越来越重视跨文化沟通能力。随着企业走向国际文的全球市场,它们需要派驻不同国家的跨国经营管理人才。这些管理人员不但在自己的文化环境下工作,更要在其他文化环境下有效地发挥作用。各种公司派驻的管理人才,必... 详细信息

在经济全球的今天,企业越来越重视跨文化沟通能力。随着企业走向国际文的全球市场,它们需要派驻不同国家的跨国经营管理人才。这些管理人员不但在自己的文化环境下工作,更要在其他文化环境下有效地发挥作用。各种公司派驻的管理人才,必须掌握应有的知识,例如工：当地习俗,文化传递,人员发展,风土人情。即使你在国内,还是要应对来自其他文化的人。您肯定会去短期项目,在他国文化下工作,你会学习到另一种文化。因此,重要的是不只是树立一个国际化的视野,或都“全球精神”,以及跨文化的理解和沟通,而且要知道如何处理对外事务。处理涉外问题上需要灵活掌握文化差异的敏感性和适应能力,同时增强不放弃的精神,保持自己文化的核心的使命。论文首先研究了跨文化团队人力资源管理的背景,介绍了研究的内容和实际意义、研究的思路和研究方法、研究的难点和创新,分析了常规人力资源管理与跨文化人力资源管理的区别、跨文化团队的优势、跨文化团队管理的困难,阐述了跨文化团队的许多问题,及其对跨文化团队人力资源管理的影响。第二,梳理了文化与跨文化性理论和人力资源管理理论,在此基础上寻求有助于调动跨文化团队的积极性与主动性的管理方案。最后,研究了关于一个外籍经理处理中国业务的案例,我们通过对案例实践总结,提出了些建议,以期对解决跨文化人力资源管理问题有关定的借鉴作用。

关键词：管理人力资源管理跨文化团队

Epidemiological, Clinical and Biological Characteristics of Patients with Chronic Hepatitis B Infection Followed-Up at the University Hospital of Conakry, Guinea

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Open Journal of Gastroenterology 2020年第10期10卷 256-265页

作者： Djenabou Diallo Kadiatou Diallo alpha Mamadou Diallo Mamadou Mansour Diallo Thierno Amadou Wann Amadou Diouldé Doumbouya Ousmane Sow Youssouf Baldé alpha Amadou Sank Dillo Department of Internal Medicine University Hospital of Donka Conakry Guinea Department of Endocrinology Diabetes and Metabolic Diseases University Hospital of Donka Conakry Guinea

Introduction: Very little information is available in Guinea on chronic hepatitis B infections. The objective of this study was to describe the epidemiological, clinical and biological features of patients who are chronic carriers of the hepatitis B virus. Patients and Methods: This is a retrospective study carried out from January 2017 to May 2020, based on the medical records of patients seen via consultation or hospitalized with a record of positive HBs antigen for more than 6 months. Clinical and paraclinical data were collected and analyzed. Results: Seven hundred and sixteen patients with a mean age of 35.6 ± 12.2 (sex ratio 2.05), were included. The HBs antigen was discovered incidentally in 36% of cases (n = 258). A history of dental care and surgical procedures was found in 46.3% (n = 290) and 21.1% (n = 138) of cases, respectively. The median value of ALAT enzymes was 34 (21 - 47) IU/L. HBeAg was positive in 20.8% (n = 55/265) of cases. The median B viral load was 458.5 (87 - 3827) IU/ml and 29% (n = 94) of patients had a viral load over 2000 IU/ml. Anti-HCV antibody was present in 10.4 % of cases (n = 39/374). HIV serology was positive in 2.7% (n = 8/298). A total of 19.4% (n = 139) of the patients had cirrhosis and 4.5% (n = 32) had hepatocellular carcinoma. Conclusion:

Modelling and Response Surface Optimisation of Methyl Violet Removal by a Mixture of Titaniferous Sand and Non-Activated Attapulgite

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Journal of Materials Science and Chemical Engineering 2022年第9期10卷 10-26页

作者： Kalidou Ba alpha Ousmane Toure Mouhamed Ndoye Falilou Mbacke Sambe Laboratory of Water Energy Environment and Industrial Processes (LE3PI) ESP-UCAD Cheikh Anta Diop University Dakar Senegal

In recent years, the discharge of dye-laden effluents from the textile industries into the aquatic environment has increased considerably. These industries are among the largest consumers of water. They generate huge amounts of pollutants from their huge discharge of toxic effluents and pose serious public health problems. So, this study focuses on the use of the mixture of titaniferous sand and attapulgite for the removal of methyl violet by adsorption in discontinuous mode. The different adsorbents were characterized by X-ray fluorescence spectroscopy and their different physico-chemical properties such as pH, zero charge potential, bulk and absolute density, porosity and specific surface area were determined. The response surfaces, through the Box-Behnken model, were used to model and optimize the operating conditions. The different factors studied were the ratio of titaniferous sand and attapulgite, the initial concentration of methyl violet and the pH. These vary between 1.25 and 8, 20 and 100 mg/L, 4 and 10 respectively. The results obtained after statistical analysis of the data show that the optimum mixture ratio is 2, the optimum concentration is 99.92 mg/L and the optimum pH is 9.88 corresponding to a maximum capacity of 5.52 mg/g and a maximum removal efficiency of 99.56%. The study of the effects of the different factors showed that the initial concentration of methyl violet and the pH significantly influence the adsorption capacity and the removal efficiency of the dye.

关键词： Adsorption Surface Response Titaniferous Sand Attapulgite Methyl Violet