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Ear Cholesteatoma Surgery in South Sahara: Our Experience in Bamako

International Journal of Otolaryngology and Head & Neck Surgery 2024年第4期13卷 293-303页

作者： Kassim Diarra oumou coulibaly Yaya Dembele Nfaly Konaté Sidibe Youssouf Saydi Ag Mohamed Harouna Sanogo Abraham Diarra Ibrahim Fofana Moussa Bourama Keita Youssouf Traore Fatogoma Issa Koné Boubacary Guindo Siaka Soumaoro Doumbia Kadidiatou Singare Mohamed Amadou Keita ORLCCF Department Gabriel Toure University Hospital Bamako Mali ORLCCF Unit Kati Army Polyclinics Kati Mali ENT-CCF Department CHU Luxembourg Bamako Mali ORLCCF Service of the Reference Center of Commune VI Sogoniko Bamako Mali

In Mali, cholesteatoma surgery remains a challenge due to the limited number of otological practitioners, and the low socio-economic level of patients reflecting the difficulties in performing CT or MRI for post-operative follow-up. We therefore initiated this work with the objective of analyzing, through a broad bibliographic review, the clinical, paraclinical, topographical, therapeutic and progressive aspects of a series of ear cholesteatoma. Materials and Method: This was a retrospective and prospective, descriptive study that took place in the ENT and head and neck surgery department of the Gabriel Touré University Hospital over 36 months from November 2020 to October 2023. These were patients admitted to the department for chronic cholestematous otitis media. Result: In total, we collected 34 files of patients admitted for cholesteatoma. This represented 9% of cases compared to all otological surgeries carried out during the same period, i.e. 362 cases. The average age of our patients was 35.31 years, with extremes ranging from 7 years to 80 years, there were 24 men and 10 women, i.e. a M/F ratio of 2.4. The average time to diagnosis was 7 years. The main functional signs were dominated by chronic fetid purulent otorrhea associated with hypoacusis in 94.6% of cases. One case of meningeal complication and three cases of cerebral empyema were reported. Clinically, a postero-superior and marginal tympanic perforation was observed in 53%, a retraction pocket in 5.9%, the sentinel polyp in 9%, and a non-marginal tympanic perforation in 32%. Pure-tone audiometry performed preoperatively for all patients showed conductive hearing loss in 83%. In 82% of cases we created a recess with the creation of a mini box. An ossiculoplasty was performed immediately with fragments of cartilage. The postoperative course found the disappearance of otorrhea (88.23%), the persistence of otorrhea in one case, two cases of facial paralysis, and one case of tinnitus. We did not identify

关键词： Cholesteatoma CT TTO TTF

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Ear Cholesteatoma Surgery in South Sahara: Our Experience in Bamako

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International Journal of Otolaryngology and Head & Neck Surgery（耳鼻喉） 2024年第4期 293页

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Numerical analysis and geophysical monitoring for stability assessment of the Northwest tailings dam at Westwood Mine

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International Journal of Mining Science and Technology 2017年第4期27卷 701-710页

作者： coulibaly Yaya Belem Tikou Cheng LiZhen Research Institute on Mines and Environment (RIME) Universite du Quebec en Abitibi-Temiscamingue Rouyn-Noranda J9X 5E4 Canada

The Westwood Mine aims to reuse the tailings storage facility #1(TSF #1) for solid waste storage, but,downstream of the Northwest dike is considered critical in terms of stability. This paper uses numerical modeling along with geophysical monitoring for assessing the Northwest dike stability during the restoration phase. The impact of waste rock deposition in the upstream TSF #1 is considered. The geophysical monitoring is based on electrical resistivity methods and was used to investigate the internal structure of the dike embankment in different deposition stages. The numerical simulations were performed with SLOPE/W code. The results show a factor of safety well above the minimum recommended value of 1.5. Geophysical monitoring revealed a vertical variation in the electrical resistivity across the dike, which indicates a multilayer structure of the embankment. Without any current in situ data, the geophysical monitoring helped estimating the nature of the materials used and the internal structure of the embankment. These interpretations were validated by geological observation of geotechnical log of the embankment. Based on this study, it is recommended that the water polishing pond be partly filled before waste rock is deposited in TSF #1. In addition, to ensure the stability of the dike, the piezometric head monitoring prior to and during waste rock deposition is recommended.

关键词： Mine tailings impoundment Dike Embankment Numerical analysis Factor of safety Geophysical monitoring

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A study of the factors affecting mobile money penetration rates in the West African Economic and Monetary Union (WAEMU) compared with East Africa

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Financial Innovation 2021年第1期7卷 536-561页

作者： Sionfou Seydou coulibaly Department of Economics and Management University Félix Houphouët Boigny of AbidjanCocodyPO Box:01 BP 974 Abidjan 01AbidjanCôte d’Ivoire

According to the 2017 Global Financial Inclusion(Global Findex)database,the average penetration rate of mobile money accounts in East Africa is higher than that of the *** study attempts to understand the factors driving the adoption and the use of mobile financial services in the WAEMU compared to East *** achieve this,micro-level data from the 2017 Global Findex database are used to perform probit and multinomial logit *** findings reveal that the same determinants influence the adoption and use of mobile money accounts across the populations of both groups of countries,specifically those related to the least vulnerable social categories(i.e.,males,older,more educated,richer and part of the workforce).Therefore,in comparison to East Africa,the delay in the penetration of mobile money accounts observed in the WAEMU may be attributed to insufficient policies for increasing the awareness of the benefits of mobile financial *** study recommends that governments in WAEMU countries promote the use of mobile money accounts among the working-age population(adults aged between 25 and 64)through the improvement of individual income level,and the introduction of incentives into the education system to encourage their population to attain higher levels of education.

关键词： Financial inclusion Mobile money Probit Multinomial logit East Africa WAEMU

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Bubble Coalescence Heat Transfer During Subcooled Nucleate Pool Boiling

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工程热物理学报 2012年第12期33卷 2171-2175页

作者： Abdoulaye coulibaly LIN Xipeng Bi Jingliang David M Christopher Department of Thermal Engineering Tsinghua University

Bubble coalescence during subcooled nucleate pool boiling was investigated experimentally using constant wall temperature boundary conditions while the wall heat flux was measured at a various locations to understand the effects of coalescence on the heat *** observations showed that the coalesced bubble moved and oscillated on the heater surface with significant heat transfer variations prior to *** observations also showed coalescence with no increase in the heat transfer *** heat flux for boiling with coalescence fluctuated much more than for single bubble boiling due to the vaporization of the liquid layer trapped between the bubbles.

关键词： microheater pool boiling bubble coalescence bubble dynamics

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A Secure and Efficient Data Sharing Scheme for Device-to-Device Communication in LTE-A Network

A Secure and Efficient Data Sharing Scheme for Device-to-Dev...

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作者： Alassane coulibaly 南京理工大学

学位级别：硕士

设备到设备通信(D2D)是指不通过LTE-Advanced(LTE-A)基站(BS)应用的用户之间的直接通信,它提供了许多优势,如更高的吞吐量,频谱效率,降低延迟等。尽管有这些明显的优势,该技术仍面临着许多安全问题。在本文中,我们提出了用于LTE-Advance... 详细信息

设备到设备通信(D2D)是指不通过LTE-Advanced(LTE-A)基站(BS)应用的用户之间的直接通信,它提供了许多优势,如更高的吞吐量,频谱效率,降低延迟等。尽管有这些明显的优势,该技术仍面临着许多安全问题。在本文中,我们提出了用于LTE-Advanced的用户设备之间的D2D通信中的安全数据共享协议。该协议基于椭圆曲线群上的无证书数字签名和签密方案。其思想是,一个通过D2D服务访问数据的用户向传统蜂窝网络的基站(eNB)发送请求,eNB认证用户并将消息转发给检测用户能够共享数据的网关。然后,可信机构(这里是eNB)向两个用户发送通知消息以开始数据传输过程。基于无证书数字签名方案的用户认证和注册阶段确保了用户的隐私受保护以及数据不可抵赖性。基于数据传输的签密保证了数据的机密性,完整性并使传输更加简单。本文出的协议的优点是双重安全性,协议的分析表明了协议对恶意攻击和仿真,的抵抗力以及计算成本的效率。

关键词：安全性数据共享 D2D LTE-A

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Participatory forest management in Burkina Faso: Members' perception of performance

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Journal of Forestry Research 2014年第3期25卷 637-646页

作者： Pascaline coulibaly-Lingani Mulualem Tigabu Patrice Savadogo Per-Christer Oden Centre National de la Recherche Scientifique et Technologique Institut de l’Environnement et de Recherches Agricoles Departement Produc-tions Forestieres 03 BP 7047 0uagadougou 03 Burkina Faso World Agroforestry Centre & International Crop Research Institute for the Semi-Arid Tropics ICRAF-ICRISAT West and Central Africa Swedish University of Agricultural Sciences Faculty of Forest Scienc-es Southern Swedish Forest Research Centre P.0.Box 49 SE-230 53 Alnarp Sweden

This study examines variations in the performance of partic-ipatory forest management programs among four forest management groups (FMGs) in southern Burkina Faso, and assesses the factors that influence their members’ perceptions of performance through a house-hold survey of 216 members. Variations in performance scores among the FMGs were analyzed through multivariate analysis of variance while multinomial regression analysis was used to identify factors that influ-ence their perception of the performance. The results reveal significant differences in performance scores among FMGs. Members of some FMGs perceived that the participatory forest management program ena-bled them to get benefits from the sale of fuelwood while performance scores in the forest conservation and decision-making processes is gener-ally poor. The score for economic performance of FMGs in turn was related to better access to roads and markets. Group size tended to en-hance economic performance via its strong influence on annual fuelwood harvest, while the resource base appeared to be inconsequential. Mem-bers of the forest management groups perceived that large group size and group heterogeneity, particularly in terms of ethnicity, as well as knowledge and awareness of problems related to the forest environment have no influence on the performance of their respective groups. For rural communities to have a favorable disposition toward sustainable forest management, differences in member understanding of collective actions and their impact before and during the implementation of partic-ipatory forest management programs should be considered.

关键词： Common-pool resources Collective action Sustainableforest management West Africa

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Potentials of an Eco-Friendly Composite in Hot-Dry Climate

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Journal of Renewable Materials 2018年第1期6卷 47-54页

作者： Fati Zoma David YKToguyeni Ousmane coulibaly Ivon Hassel Abdoulaye Ouedraogo Laboratory of Physics and Chemistry of the Environment University Ouaga 01 Pr Joseph KI-ZERBO03 BP 7021 OuagadougouBurkina Faso Department of Engineering Sciences Division of Applied MechanicsUppsala UniversityBox 534SE-75121 UppsalaSweden Laboratory of Thermal and Renewable Energies University Ouaga 01 Pr Joseph KI-ZERBO03 BP 7021 OuagadougouBurkina Faso

This study aims to show the aptitude of a locally made composite for providing thermal comfort and mechanical resistance in buildings in hot-dry *** thermal characterization reveals that the thermal diffusivity of the studied material is lower than that of commonly used materials such as agglomerated and full cinderblocks and laterite blocks and therefore is a better insulating *** addition,its thermal inertia is the highest compared to commonly used materials of agglomerated and full cinderblocks,laterite blocks and compressed earth blocks,which implies a longer time *** the basis of mechanical resistance,with a compression resistance of 3.61 MPa,the studied material meets the requirement of CRATerre and NBF 02-003(2009)as a material for construction of single-storey ***,this material,containing 1%Hibiscus sabdariffa fibers and compacted by vibration,is a suitable material for the walls of standing buildings and for thermal comfort in hot dry climates.

关键词： Local composite vibration characterization single-storey building envelope thermal comfort

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Cross-Dimensional Video Super-Resolution Exploring Features Interactions and Dependencies

Cross-Dimensional Video Super-Resolution Exploring Features ...

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作者： Yacouba coulibaly 中国石油大学(北京)

学位级别：硕士

Video super-resolution（VSR）is a deep learning-based video restoration task that aims to improve video *** a series of low-resolution（LR）input frames,the goal of VSR is to map the corresponding central high-resolution（HR）frame by exploring the temporal connection between consecutive *** convolution neural network（CNN）,due to its high efficiency in computer vision tasks,has been widely used in ***,given the input frames,these methods try to align the reference frame with the supporting frames using optical *** motion estimation and motion compensation（MEMC）using optical flow is computationally expensive and fails to guarantee proper high resolution（HR）.This study presents a novel approach to video super-resolution（VSR）that addresses the challenges of computational complexity and time consumption in existing *** focuses on extracting shared information from the reference frame and its neighboring frames and how different features across spatial,temporal,and channel dimensions interact and depend on each other to improve video *** achieve this,the proposed approach first adopts a three-step learning pipeline:efficient fast learning with the fast-learning block（3D-EFL）.The 3D-EFL introduces 3D depthwise separable convolution to learn feature representation from input frames with few computational *** second step consists of a triplet attention learning strategy that investigates the interactions between spatial and channel dimensions and exploits these interactions to enhance video *** final step consists of increasing the spatial dimension of the feature and high-resolving the reference ***,it adopts low-residual and high-residual learning to connect these steps,alleviating the gradient vanishing problem and allowing more gradient *** proposed approach not only reduces computational complexity but also provides an accurate high-resolution（HR）output without the need for inter-frame mot

关键词： deep learning video super-resolution attention neural network cross-dimensional learning dimensional reduction

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Dynamics of freshwater snails and Schistosoma infection prevalence in schoolchildren during the construction and operation of a multipurpose dam in central Côte d’Ivoire

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Infectious Diseases of Poverty 2017年第1期6卷 810-818页

作者： Nana R.Diakite Mirko S.Winkler Jean T.coulibaly Negnorogo Guindo-coulibaly Jürg Utzinger Eliezer K.N’Goran Laboratoire de Zoologie et Biologie Animale Unitede Formation et de Recherche BiosciencesUniversite Felix Houphouët-Boigny22 BP 522Abidjan 22Cote d’Ivoire Swiss Tropical and Public Health Institute P.O.BoxCH-4002BaselSwitzerland University of Basel P.O.BoxCH-4003BaselSwitzerland Departement Environnement et Sante Centre Suisse de Recherches Scientifiques en Cote d’Ivoire01 BP 1303Abidjan 01Cote d’Ivoire

Background:The construction and operation of small multipurpose dams in Africa have a history of altering the transmission of water-based diseases,including *** current study was designed to investigate the abundance and dynamics of schistosomiasis intermediate host snails and Schistosoma infections in humans during the construction and the first years of operation of a small multipurpose dam in Côte d’***:The study was carried out in Raffierkro and four neighbouring villages in central Côte d’Ivoire between 2007 and *** were collected by two experienced investigators using scoops and forceps for 15 min at each *** were identified at genera and,whenever possible,species level,and subjected to testing for cercarial *** aged 6-15 years were examined once every year for Schistosoma haematobium and *** infection,using urine filtration and duplication Kato-Katz thick smears,***,551 adults were examined for Schistosoma infection before(June 2007)and 359 individuals 2 years after dam construction(June 2009).Results:Overall,1700 snails belonging to nine different genera were collected from 19 sampling ***(potential intermediate host snails of ***)and Pila were the most common genera,whereas Biomphalaria(potential intermediate host snail of ***),Lymnaea,Physa and Melanoides were found in two *** the first-year sampling period,65 snails were collected,of which 13(20%)were schistosomiasis intermediate *** subsequent years,out of 1635 snails collected,1079(66%)were identified as potential intermediate host for schistosomiasis,but none were shedding *** prevalence of *** among adults in the study area was low(0.4%in 2007 and 0.3%in 2009),whereas the prevalence of *** declined from 13.9%to 2.9%in this two-year ***:The low prevalence of schistosomiasis in humans and the absence of infected intermediate host s

关键词： Schistosomiasis Intermediate host snail Transmission Water resources development and management Multipurpose dam Cote d’Ivoire

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