检索结果-南通市图书馆

Sleep Disorders among Professional Oil Tanker Drivers in ouagadougou Burkina Faso

Occupational Diseases and Environmental Medicine 2024年第1期12卷 1-20页

作者： guy alain ouédraogo Dofinihanou Dite Inessa Coulibaly Mênonli Adjobimey Abdoul Risgou ouédraogo Rose Mikponhoue Antoine Vikkey Hinson Health Sciences Training and Research Unit University of Ouahigouya Ouagadougou Burkina Faso Department of Pneumology Regional University Hospital of Ouahigouya Ouagadougou Burkina Faso Workers Health Office Ouagadougou Burkina Faso Occupational and Environmental Health Research Unit Faculty of Health Sciences Cotonou Republic of Benin Health Sciences Training and Research Unit Université Joseph Ki-Zerbo Ouagadougou Burkina Faso

Introduction: Sleep disorders among professional drivers are a major road safety problem. They cause fatigue and drowsiness at the wheel, which can lead to road traffic accidents and even accidents at work. The aim of this study was to assess sleep disorders among professional drivers of oil tankers in ouagadougou, Burkina Faso. Methods: This was a descriptive and analytical cross-sectional study carried out from 11 April 2020 to 11 September 2020 in the national hydrocarbon company’s fuel depot. All the drivers present at the time were included and accomplished a questionnaire incorporating the commonly scales using to assess sleep disorders, sleep quality and sleep apnoea. Data analysis using R 3.6.1 software enabled to perform univariate and multivariate analyses to identify associated factors. Adjusted odd ratios were used to measure the strength of association. The significance level chosen was p ≤ 0.05. Results: All the 339 respondents were male. A proportion of 33.6% suffered from insomnia, including 12.7% with moderate to severe insomnia, and 18.58% were at risk of sleep apnoea. On the Epworth scale, 26.6% of drivers showed sleep debt and 4.1% excessive daytime sleepiness. The risk factors associated with insomnia were the use of psychostimulants. A history of diabetes and insomnia were risk factors associated with sleep apnoea syndrome. Conclusion: The prevalence of sleep disturbance and insomnia among the respondents were 52.2% and 33.6% respectively. Use of psychostimulants was the identified risk factor. The prevalence of SAS was 4.72%, with diabetes and insomnia as associated factors.

关键词： Sleep Disorders Sleep Apnoea Occupational Health Burkina

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Polysaccharide-based chromatographic adsorbents for virus purification and viral clearance

引用

Journal of Pharmaceutical Analysis 2020年第4期10卷 291-312页

作者： guy-alain Junter Laurent Lebrun Normandie Univ UNIROUENINSA RouenCNRSPBS76000RouenFrance

Viruses still pose a significant threat to human and animal health *** the fight against viral infections,high-purity viral stocks are needed for manufacture of safer *** is also a priority to ensure the viral safety of biopharmaceuticals such as blood *** techniques are widely implemented at both academic and industrial levels in the purification of viral particles,whole viruses and virus-like particles to remove viral contaminants from biopharmaceutical *** paper focuses on polysaccharide adsorbents,particulate resins and membrane adsorbers,used in virus purification/removal chromatography *** chromatographic modes are surveyed,with particular attention to ion exchange and affinity/pseudo-affinity adsorbents among which commercially available agarose-based resins(Sepharose®)and cellulose-based membrane adsorbers(Sartobind®)occupy a dominant *** built on the development of new ligands coupled to conventional agarose/cellulose matrices,the development perspectives of polysaccharide-based chromatography media in this antiviral area are stressed in the conclusive part.

关键词： Polysaccharide Chromatography Virus particle Biopharmaceuticals purification Vaccine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

2D Modeling of Solar Cell Radial Junction: Study of Carriers Charge Density and Photocurrent Density in Static Mode under Monochromatic Illumination

引用

Energy and Power Engineering 2020年第10期12卷 568-577页

作者： Moussa ouédraogo Raguilignaba Sam alain Diasso Bernard Zouma François Zougmoré Laboratoire de Maté riaux d’H&eacute liophysique et Environnement (LaMHE) D&eacute partement de Physique UFR/ST Universit&eacute Nazi Boni Bobo Dioulasso Burkina Faso Laboratoire de Maté riaux et Environnement D&eacute partement de Physique UFR/SEA Universit&eacute Joseph Ki-Zerbo Ouagadougou Burkina Faso Laboratoire d’Energies Thermique Renouvelables (L.E.T.R.E) Universit&eacute Joseph Ki-Zerbo Ouagadougou Burkina Faso

A theoretical study of a polysilicon solar cell with a radial junction in static regime under monochromatic illumination is presented in this paper. The junction radial solar cell geometry is illustrated and described. The carriers’ diffusion equation is established and solved under quasi-neutral base assumption with boundaries conditions and Bessel equations. New analytical expressions of electrons and holes density and photocurrent are found. The wavelength and structural parameters (base radius, emitter thickness) influences on charge carriers density and photocurrent are shown and examined.

关键词： Electrons Density Holes Density Holes Photocurrent Radial Junction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of phosphatation and calcination on the environmental behaviour of sediments

引用

International Journal of Sediment Research 2019年第5期34卷 486-495页

作者： Moussa Dia Rachid Zentar Nor-edine Abriak Ange Nzihou guy Depelsenaire alain Germeau Department of Civil & Environmental Engineering Toulouse University Mines Albi CNRS RAPSODEE Center Campus Jarlard SOLVAY SA DCRT 4. PRAYON SA

Dredging operations produce considerable quantities of materials, to be managed and this opens an opportunity for valorization in civil engineering. However, the contamination of the dredged sediment has become a major problem to solve. The major contaminants are heavy metals and organic compounds This study focuses on the use of phosphoric acid(H3 PO4) to stabilize heavy metals from sediments an destroy organic matter by calcination at 650 °C with a goal of using sediments in roadworks. Severa studies have been conducted in this field. The stabilized materials obtained have been used in civ engineering. The main purpose of this work is to discuss the environmental behavior of marine sedimen treated by phosphatation and calcination. Two types of phosphoric acids were used. The p H dependenc leaching test has been used as the basic characterization to evaluate the effect of the type of phosphori acid on the metals behavior in a valorization scenario. The standard leaching test and the Toxicit Characteristic Leaching Procedure(TCLP) were conducted as compliance tests. In regards of the obtaine results, the environmental assessment has also shown a reduction in the availability of targeted heav metals in alkaline environment whatever the type of acid used for treatment. This opens opportunitie for co-valorization.

关键词： Polluted sediments Heavy metals Phosphatation Calcination and environmental behaviour

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Renewable Energies in Africa, Context and Socio-Economic Challenge

引用

Open Journal of Applied Sciences 2022年第11期12卷 1856-1872页

作者： Daouda oubda Soumaïla ouédraogo alain Diasso Marcel Bawindsom Kébré François Zougmoré Zacharie Koalga Frédéric ouattara LA.M.E (Laboratoire de Matériaux et Environnement) UFR-SEA (Unité de Formation et de Recherche en Sciences Exactes et Appliquées) Ecole Doctorale Sciences et Technologies Université Joseph KI-ZERBO Ouagadougou Burkina Faso LA.R.E.M.E (Laboratoire de Recherche en Energétique et Météorologie de l’Espace) Université Norbert Zongo Koudougou Burkina Faso

In this paper, we have shown that Africa has an enormous wealth of renewable energy resources among the most important in the world such as the strong sunshine, Congo and Nile Rivers respectively among the most powerful and the longest in the world. We have underlined the presence of important forests, rich subsoil in mineral elements, and strong winds. In addition to a rapidly growing human capital, Africa, therefore, has at its disposal all the factors enabling it to initiate sustainable and inclusive socio-economic development. We have shown that the transformation of these renewable energies is an opportunity for Africa to reach its socio-economic challenges. The development of renewable energies in Africa will be a source of many financial benefits and advantages both in terms of improving living conditions and carrying out activities. The electrical supply of rural areas of Africa represents a considerable issue, which can be a propellant factor in long-term socio-economic development if the conditions of use of clean fuel and cooking technologies, especially sanitary are taken into account. The provision of modern energy services can contribute to the creation of jobs for young people upstream. Among other things, we can note the development of local skills, the creation of income-generating activities, and the improvement of hygiene and health measures which are necessary conditions for family and social well-being. This requires a policy focused, on research in general and in particular on semiconductors that participate in the transformation of photovoltaic solar energy. We have stressed that Africa which is currently experiencing a period of economic growth and sustained transformation must be very looking at in its energy policy and give pride of place to renewable energies to initiate sustainable socio-economic development, equitable and inclusive different social strata both in rural areas and urban areas.

关键词： Africa Renewable Energy Photovoltaic Solar Energy Semiconductor Socio-Economic Urban Area Rural Area

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Performance for Cu(In,Ga)Se₂ Quaternary System-Based Solar Cells with Alternative Buffer Layers

引用

Advances in Materials Physics and Chemistry 2022年第9期12卷 207-219页

作者： Daouda oubda Marcel Bawindsom Kébré Soumaïla ouédraogo alain Diasso François Zougmoré Zacharie Koalga Frédéric ouattara Laboratoire de Matériaux et Environnement (LA.M.E)-UFR/SEA Université Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire de Recherche en Energétique et Météorologie de l’Espace (LA.R.E.M.E) Université Norbert Zongo Koudougou Burkina Faso

In this study, the authors investigated the performance of different buffer layers through the electrical parameters such as Jsc, Voc, QE and η of the quaternary system Cu(In,Ga)Se2 solar cells. The performance of Cu(In,Ga)Se2solar cells has been modeled and numerically simulated by using the SCAPS- 1D device simulation tool. The cells with a ZnSe, Zn(O,S) and (Zn,Mg)O buffer layers were compared with the reference CdS buffer layer. The investigation of ZnSe, Zn(O, S) and (Zn,Mg)O-based cells to substitute the traditional CdS in the future shows that the ZnSe-buffer layer is a potential material to replace CdS, which revealed the best efficiency of 20.76%, the other electrical parameters are: JSC = 34.6 mA/cm2, VOC = 0.76 V and FF = 79.6%. The losses as a function of the temperature are estimated at 0.1%/K, among all kinds of buffer layers studied. We have also shown that the use of a high band-gap buffer layer is necessary to obtain a better short-circuit current density JSC. From our results, we note that the chalcogenide solar cells with Zn-based alternative buffer layer have almost the same stability thatthe traditional CdS buffer layer solar cells have.

关键词： Thin Film Solar Cells CIGS Absorber Alternative Buffer Layers SCAPS-1D Electrical Parameters

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ankylosing Spondylitis in Sub-Saharan Africa: A Series of 48 Cases Reported in Burkina Faso (West Africa)

引用

Open Journal of Rheumatology and Autoimmune Diseases 2018年第3期8卷 87-92页

作者： Wendlassida Joelle Zabsonre Tiendrebeogo Serge Aime Sawadogo Fulgence Kabore alain Ilboudo Charles Sougue Enselme Zongo Camille Sompougdou Moussa ouédraogo Evariste Tiendrebeogo Dieu-Donne ouedraogo Rheumatology Department Bogodogo District Hospital Ouagadougou Burkina Faso Université ouaga I Pr Joseph Ki-Zerbo Ouagadougou Burkina Faso Department of Basic and Mixed Sciences Université Ouaga I Pr Joseph Ki-Zerbo Ouagadougou Burkina Faso

Background: Ankylosing spondylitis is rare in sub-Saharan Africa. The purpose of our study was to report cases of AS in a black African population and to see the influence of gender. Method: It was a retrospective study conducted in the Rheumatology Department of ouagadougou University Hospital, ouagadougou, from March 2006 to February 28, 2015 for a period of nine years. All the patients who went under a rheumatology consultation during the study period were included. Patients with AS defined by the modified New York criteria were selected. Result: Forty-eight (0.61%) cases of AS were diagnosed among 7806 patients received in the rheumatology department during the study period. The search for the HLA B27 antigen in 20 patients was positive in 11 (55%). Half of the patients (50%) had a BASDAI score ≥ 4. Sacroiliitis was observed in all patients;it was stage 4 in 8 patients. Comparing by sex, there was no statistically significant difference by gender. Conclusion: Prevalence of ankylosing spondylitis increases. The presentation is similar to that of the caucasian series.

关键词： Ankylosing Spondylitis Black African Gender

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optimization of Mo/Cu(In,Ga)Se2/CdS/ZnO Hetero-Junction Solar Cell Performance by Numerical Simulation with SCAPS-1D

引用

材料科学与工程（中英文B版） 2021年第4期11卷 156-167页

作者： Adama Zongo Daouda oubda Soumaïla ouédraogo Marcel Bawindsom Kébré alain Diasso Issiaka Sankara Boureima Traore François Zougmoré Zacharie Koalga Frédéric ouattara LA.M.E(Laboratoire de Matériaux et Environnement) UFR-SEA(Unitéde Formation et de Recherche en Sciences Exactes et Appliquées)Ecole Doctorale Sciences et Technologies UniversitéJoseph KI-ZERBOOuaga 03 BP 7021Burkina Faso LA.R.E.M.E(Laboratoire de Recherche en Energétique et Météorologie de l’Espace) Ecole Doctorale Sciences et TechnologiesUniversitéNorbert ZongoKoudougou BP 376Burkina Faso

The paper presents a one-dimensional simulation study of chalcopyrite Cu(In,Ga)Se2(CIGS)solar cells,where the effects of the variation of CIGS,CdS,and ZnO layers are *** the influence of the variation of doping and the defects density of shallow uniform donors and acceptors types are also *** analyse of the simulation results shows that recombination inside the space charge region(SCR)decrease more our CIGS solar cell model *** also found that the electrical parameters increase with increasing CIGS absorber doping density exception of JSC values that reach their maximum at 1016cm-3 and decrease due to recombination of charge carriers in the p-n junction particularly the recombination inside the *** also stressed the fact that the effects of shallow uniforme donor density is very low on the performance of our CIGS solar cell model is important because it will allow to control the width of space charge region from shallow uniform acceptors defect density that has a strong influence on the different electrical ***,good optimization of performance of the CIGS-based solar cell necessarily passes though a good control of the space charge region width and will constitute a boosting perspective for the preparation of our next *** contact that the results obtained of the numerical simulation with SCAPS-1D show a good agreement comparatively of the literature *** simulation of our CIGS solar cell presents best performances if the values of the absorber layer thickness is in the range of 0.02 to 0.03μm,the buffer layer thickness is in the range of 0.02 to 0.06μm and the defects density of shallow uniform acceptors types is in the range of 1015 to 1017cm-3.

关键词： Numerical simulation SCAPS-1D CIGS solar cell shallow uniform donors and acceptors defect density

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Peripheral Hospital as Focal Point for Pacemaker Activity: Review of the Last 300 Implantations Carried out at the Haute Correze Hospital Center

引用

World Journal of Cardiovascular Diseases 2024年第9期14卷 547-556页

作者： Mazou Temgoua alain Berenfeld Lionel Blasco Benoit guy-Moyat Cardiology Department Haute Correze Hospital Center Ussel France Cardiac Arrythmia Unit Cardiology Department Dupuytren University Hospital Limoges France

Background: Pacemaker implantation is a very old activity which has revolutionized the cardiology practice throughout the world. This activity is effective at the Haute Correze Hospital Center since more than 20 years. Due to progress in this area, and the increasing request within this center located at the outskirts of town, we set out to evaluate our pacemaker activity in general and more specifically to assess the post-procedural complications in our series patients. Methodology: This was a retrospective longitudinal study. Data were recorded for period of 90 months from 27/05/2016 to 19/11/2023. This data collection was possible via a specific register completed by computerized patient data from the SillageTM software. All files of patients implanted with single or dual chamber pacemakers were included, generator replacements, upgrading procedures and addition of leads were excluded. The sampling was non-probabilistic, consecutive and non-exhaustive. Statistical analysis was carried out using the Excel 2019 spreadsheet and SPSS version 23 software. The quantitative variables were presented as mean ± standard deviation, the qualitative data as proportions. Results: A total of 303 first-time pacemaker’s implantations were carried out during the study period (rate of 40 per year). The average age in the population was 79.7 ± 9.4 years (44 - 99 years) with a male predominance of 63.7% (n = 193). Atrioventricular block (2nd and 3rd degree) was the main indication for pacemaker implantation in 42.9% of cases (n = 130). Patients were most often implanted with a dual-chamber pacemaker (57.7%, n = 175). The approach was most often cephalic in 72.6% of cases (n = 220), followed by the subclavian access in 27.4% of cases (n = 84). The average fluoroscopy time was 7.9 min ± 2.4 (1 - 43). The average irradiation dose in gray/cm2 was 12.4 ± 9.3 (0.22 - 117.5). The average length of hospitalization was 7 ± 4 (2 - 26) days. The overall complication rate at one year was 12.9% (

关键词： Peripheral Hospital Pacemaker Haute Correze Hospital Center

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Design Optimization of a Lattice Tower: Structure and Foundations

引用

Open Journal of Applied Sciences 2024年第2期14卷 483-493页

作者： Cossi Télesphore Nounangnonhou guy Clarence Semassou Kossoun alain Tossa Noémie Sintondji Laboratory of Energetics and Applied Mechanics (LEMA) University of Abomey-Calavi Abomey-Calavi Benin Laboratory of Electrotechnics Telecommunications and Applied Informatics (LETIA) University of Abomey-Calavi Abomey-Calavi Bénin

Produced in power plants, electrical energy is transported to places of consumption via the electricity network. At the heart of this network are the supports that allow electricity to be efficiently transported over long distances, guaranteeing the security and supply of energy to the various centers of use. In the construction of a line, supports occupy an important part in terms of safety and construction cost. It is therefore essential to optimize their use to reduce the cost of transmission lines. This work addresses this problem, which focuses on the optimal utilization of X-lattice towers in the construction of overhead power lines. The challenge is to reconcile the search for optimal cost and respect for the design, resistance and service constraints of the structure. To do this, a parameter having a strong correlation with the weight, foundation and construction cost of the X-lattice tower for 161 kV lines is determined as an important cost variable. This parameter is the wheelbase of the towers. The junction point between the structure and the foundations is obtained by measuring the forces at the base of the tower following the lowering of the loads. These efforts make it possible to size foundations which are of the inverted or isolated sole type. The results obtained reveal that from 8 meters in width, the wheelbase gradually changes until the optimum is obtained at 6.29 meters. With this wheelbase, the production cost is optimal. It clearly emerges from this study that the construction of lattice pylons with a wheelbase of approximately 6.29 meters makes it possible to optimize the cost of construction of 161 kV lines in the Republic of Benin.

关键词： Lattice Tower Wheelbase Cost Optimization Foundation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：