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Lightweight Key Management Scheme Using Fuzzy Extractor for Wireless Mobile Sensor Network

Computers, Materials & Continua 2022年第4期71卷 1695-1712页

作者： Eid Rehman ibrahima kalil toure Kashif Sultan Muhammad Asif Muhammad Habib Najam Ul Hasan Oh-Young Song Aaqif Afzaal Abbasi Department of Software Engineering Foundation UniversityIslamabad44000Pakistan Centre Informatique Universite Gamal Abdel Nasser deConakryGuinea Department of Software Engineering Bahria University Islamabad CampusIslamabadPakistan GDC Ahmad Karak Higher Education DepartmentKhyber PakhtunkhwaPakistan Department of Electrical and Computer Engineering Dhofar UniversitySalalahOman Department of Software Sejong UniversitySeoul05006Korea

The mature design of wireless mobile sensor network makes it to be used in vast verities of applications including from home used to the security *** such types of applications based on wireless mobile sensor network are generally using real time data,most of them are interested in real time communication directly from cluster head of cluster instead of a base station in cluster *** would be possible if an external user allows to directly access real time data from the cluster head in cluster wireless mobile sensor network instead of accessing data from base *** this leads to a serious security breach and degrades the performance of any security protocol available in this *** existing schemes for authentication and cluster key management for external users,exchange a number of messages between cluster head and base station to allow external to access real time data from the base station instead of cluster *** increase communication cost and delay in such real time access *** handle this critical issue in cluster wireless mobile sensor network,we propose a lightweight authentication and key management scheme using a fuzzy *** this scheme,any external user can access data directly from the cluster head of any cluster without the involvement of the base *** proposed scheme only uses the one-way hash functions and bitwise XOR operations,apart from the fuzzy extractor method for the user biometric verification at the login *** presented scheme supports scalability for an increasing number of nodes using *** proposed scheme increases the life-time of the network by decreasing the key pool size.

关键词： Fuzzy extractor user authentication key management cluster session key wireless mobile sensor network

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An approach for QoS measurement and web service selection sureness

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High Technology Letters 2013年第3期19卷 283-289页

作者： Shariq Hussain Wang Zhaoshun ibrahima kalil toure School of Computer and Communication Engineering University of Science and Technology Beijing

Web services have gained popularity in recent years and provide a new model of web,which facilitates interaction of scientific and business applications through the *** often,several services with similar functionality are available from a large and changing number of service *** of Service(QoS)is the dominant factor in service selection and is of great importance to *** this paper,we propose a model for QoS measurement and web services *** model consists of QoS model,QoS monitoring,QoS comparison and service selection with a QoS feedback *** most suitable service is to take into account the agreed QoS,monitoring is done during invocation phase and if any deviation is recorded,next suitable service is *** the model is proved to be feasible and effective by simulation experiments.

关键词： Web服务 QoS模型测量商业应用质量服务仿真实验互联网质量比

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An adaptive routing protocol based on relative positions in VANETs

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High Technology Letters 2012年第1期18卷 13-19页

作者： Wang Lei Yang Yang Wang Xiaobo ibrahima kalil toure Mi Zhenqiang School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083P.R.China

After presenting weaknesses of several classic routing protocols applied in vehicular ad hoc networks (VANETs) by a qualitative comparison, this paper proposes a novel self-adaptive routing protocol, named ARPP. With respect to the specific characteristics of VANETs, the proposed routing protocol adopts a dynamic topology establishment and time-varying control message sending mechanism. A direction-based forwarding strategy and a specific warning solution enhance the routing performance in ARPP. Simulation results show that the ARPP protocol outperforms the classic AODV in urban vehicle environment. © by HIGH TECHNOLOGY LETTERS PRESS.

关键词：路由协议自适应相对位置城市车辆消息发送时间变化拓扑结构路由性能

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道路生态滤沟回填黄土毛细持水特性试验研究

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中外公路 2024年第4期44卷 83-90页

作者：南亚林张晓玉陈鸿安鹏刘魁 CAMARA ibrahima kalil 信息产业部电子综合勘察研究院陕西西安710054 陕西省土体工程技术研究中心陕西西安710054 长安大学地质工程与测绘学院陕西西安710064 西部超导材料科技股份有限公司陕西西安710018

市政道路生态滤沟雨季积水渗透、旱季保墒是基本功能,而黄土生态滤沟回填土的设计无据可依,常导致景观植被雨季渍害或旱季枯死。为此,通过对重塑黄土进行小尺寸毛细水上升高度试验、大尺寸持水特性模型试验以及非饱和数值分析研究。结... 详细信息

市政道路生态滤沟雨季积水渗透、旱季保墒是基本功能,而黄土生态滤沟回填土的设计无据可依,常导致景观植被雨季渍害或旱季枯死。为此,通过对重塑黄土进行小尺寸毛细水上升高度试验、大尺寸持水特性模型试验以及非饱和数值分析研究。结果表明:当干密度分别为1.3 g/cm^(3)、1.4 g/cm^(3)时,土柱的最终毛细水上升高度均可达到100 cm。土柱高度超过20 cm后,其含水率基本保持稳定,稳定含水率分别为30.0%、28.0%;在重塑黄土毛细水上升过程中,存在一个暂态饱和区,其中干密度越小,孔隙比越大,大孔隙数量增多,毛细吸力减弱,导致水分迁移速率较慢,同时被湿桥封闭的大气泡数量也较多,因此暂态饱和区的持续时间较长。对于1.3 g/cm^(3)的土柱,其湿润锋时程曲线的模拟值与实测值基本吻合。综合考虑黄土地层稳定的天然平均干密度、毛细水上升高度及其持水特性以及生态滤沟回填土在后期将经历反复的渗透固结与毛细作用,采用1.2 g/cm^(3)作为回填控制干密度,以确保市政道路生态滤沟中的植土在旱季仍能维持植被生长所需的土壤湿度。

关键词：生态滤沟回填黄土毛细水上升模型试验数值模拟

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Congenital Cervico-Mandibular Cystic Lymphangioma in Pediatric Surgical Setting in Guinea

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Open Journal of Pediatrics 2024年第1期14卷 164-173页

作者： Thierno Saïdou Barry Mohamed Lamine Sadou Sacko Balla Keita Aissatou Bailo Balde Mamadou Alpha Diallo Moussa Conde ibrahima kalil Dioubate Mory Sangare Salamata Sall Mariama Dalanda Diallo Daniel Agbo-Panzo Pediatric Surgery Department Donka National Hospital (HND) of Conakry University Hospital (Gamal Abdel Nasser University of Conakry (UGANC) of Guinea) Conakry Guinea Hadja Bilguissou BARRY Medical-Surgical Clinic (HBB) Conakry Guinea Albert Royer Children’s Service Cheikh Anta DIOP University (UCAD) Dakar Senegal Surgery Department of the Regional Hospital Center of Ziguinchor (CHRZ) Ziguinchor Senegal

Introduction: Cystic lymphangiomas are rare benign malformative tumors of the lymphatic system of obscure etiopathogenesis. The cervico-facial location remains the most common (75%). Although benign, these tumors remain potentially fatal, due to possible compression of the upper aero-digestive tract. The aim of this work is to study the epidemiological, diagnostic and therapeutic characteristics of cervico-mandibular congenital cystic lymphangiomas in the pediatric surgery department of the Donka National Hospital (HND) Conakry. Patients and methods: This is a retrospective and descriptive study of 13 files lasting 7 years from January 2015 to December 31, 2021. The files of children whose age is less than or equal to 15 years operated on cervical tumor with histological evidence of cystic lymphangioma were retained. The data were analyzed using SPSS statistical software 21 and anonymously. Results: The incidence of this study was 1.86 cases per year and a sex ratio of 0.62 in favor of girls. The average age was 8 months 19 days. In the antecedents, we only find poorly monitored pregnancies. The average size of the tumors was 11.85 cm. Cervical ultrasound and standard x-ray of the cervical mass were the only examinations performed. Total surgical excision of the cervical tumor was performed in all patients. The mass was polycystic on exploration. The histological examination of the surgical specimens was in favor of a cystic lymphangioma. The surgical consequences were simple in 11 patients (84.62%) and complicated by parietal suppuration in 2 cases (15.38%). There were no cases of recurrence after one year of follow-up. Conclusion: Cervico-mandibular cystic lymphangiomas are the most frequent locations of congenital lymphangiomas in children. Their severity is linked to the risk of compression of the aero-digestive tracts. Their diagnosis must be confirmed by the histology of the surgical specimen. Despite the therapeutic arsenal, excision of the cystic mass remain

关键词： Congenital Cystic Lymphangioma (LKC) Child Pediatric Surgery Guinea

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柔性工作流中的服务组合可协调性研究

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小型微型计算机系统 2011年第5期32卷 814-819页

作者：张静乐杨扬卡利勒王元卓赵晓永北京科技大学信息工程学院北京100083 清华大学计算机系北京100084

提出柔性工作流中的服务组合可协调性分析方法.给出服务以及服务组合可协调性的定义;在可协调性定义的基础上给出组合服务间可协调性判定算法;最后,以电子商务系统中的物流系统为例,在随机Petri网模型建模的基础上,着重介绍了柔性工作... 详细信息

提出柔性工作流中的服务组合可协调性分析方法.给出服务以及服务组合可协调性的定义;在可协调性定义的基础上给出组合服务间可协调性判定算法;最后,以电子商务系统中的物流系统为例,在随机Petri网模型建模的基础上,着重介绍了柔性工作系统中基于服务可协调性判定的服务自动组合方法.

关键词：柔性工作流服务组合可协调性随机Petri网电子商务

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Successful Separation of Conjoined Twins at the Conakry University Hospital Center

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Open Journal of Pediatrics 2022年第3期12卷 514-521页

作者： Mamadou Alpha Touré Balla Keita Balla Moussa Touré Naby Fofana ibrahima kalil Dioubaté Thiero Mamadou Aliou Touré Pediatric Surgery Department Donka National Hospital Conakry Guinea Pediatric Surgery Unit General Surgery Department Ignace Deen Hospital Conakry Guinea Institute of Nutrition and Health for Children Conakry Guinea

Introduction: The birth of conjoined twins is an event extremely rare that offers unique therapeutic challenges and circumstances. We must examine each situation with the many questions that arise and which sometimes require a long reflection. We report a case of separation of pygopages conjoined twins as well as a review of the literature. Patients and Observations: a pair of conjoined twins aged 11 days, weighing 3080 g between them, was referred to the neonatology department from the Faranah prefecture, 300 km from Conakry, for care. The mother, a 30-year-old housewife, multipara, eight gestures and nine parities, had not followed any prenatal consultation. The delivery took place at home in a village with the death of the mother immediately postpartum. The clinical and paraclinical investigation had concluded with the diagnosis of Siamese type pygopage. After multidisciplinary consultation, the surgical treatment by separation of the twins was carried out at the age of 50 days with success and preservation of the physiological functions. Conclusion: The birth of conjoined twins is extremely rare. Each pair of Siamese is different and the surgical strategy must be adapted according to the shared organs. The perfect multidisciplinary work of the medical staff has been the main contributor to our success.

关键词： Siamese Twins Pygopages Multidisciplinarity Separation Conakry Hospital and University Center

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Epidemiology and Clinical Profile of Behcet’s Disease in a Sub-Saharan Country: About Five Observations

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Open Journal of Internal Medicine 2023年第2期13卷 120-125页

作者： Thierno Amadou Wann Mamadou Lamine Yaya Bah Mamadou Saliou Baldé Abdoul Karim Baldé Toumin Camara ibrahima kalil Shiaman Barro Amadou Kaké Djibril Sylla Internal Medicine Teaching Hospital of Conakry Conakry Guinea Nephrology-Hemodialysis Department Teaching Hospital of Donka Donka Guinea Ophtalmology Department CADES/O CHU de Conakry Conakry Guinea

Behçet’s disease (BD) is a multi-systemic vasculitis characterized by a triad made up of oral aphthosis, genital aphthosis and uveitis which may or may not be associated with visceral involvement. Other times described in the ancient silk road, BD is increasingly found in countries south of the Sahara with the mixing of populations. Our objective was to describe the epidemiology and clinical characteristics of BD in an African country. Methodology: This was a five-year retrospective study in the internal medicine department of Donka National Hospital. We used international criteria finding BD. Urinary dipstick was use for finding kidney disease. Result: During the period, five cases of Behçet’s disease were collected. The average age was 35 years old. The male sex was more represented with 3 out of 5 cases. The most common clinical manifestation was oral aphthosis in all patients (100%), followed by genital aphthosis in 4 cases (80%). The other clinical manifestations observed were uveitis in 3 cases (60%), joint manifestations such as arthralgia in 3 cases (60%) and neurological manifestations such as chronic headache in one case (20%). HLA-B51 was found in two cases. The pattergic test done in two patients came back positive (100%). The patients received colchicine and oral corticosteroid therapy. Two patients were lost to sight. We deplored a death probably in a neuro-Behçet table before the rebellious headaches. Conclusion: Behçet’s disease is a multi-systemic vasculitis that must be evoked and managed quickly in a tropical environment, especially since the prognosis, vital and functional prognosis can be engaged.

关键词： Profile Epidemiological Clinical Behçet Sub-Saharan

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Coronavirus Disease 2019 (COVID-19) in Conakry, Republic of Guinea: Analysis and Relationship with Meteorological Factors

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Atmospheric and Climate Sciences 2021年第2期11卷 302-323页

作者： ibrahima kalil Kante ibrahima Diouf Tamba Nicolas Millimono Jean Moussa Kourouma Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang école Supérieure Polytechnique Université Cheikh Anta Diop Dakar Dakar Senegal Direction Nationale de la Météorologie de Guinée Conakry Guinea Université Gamal Abdel Nasser de Conakry/Laboratoire d’Enseignement et de Recherche en énergétique Appliquée de Conakry Conakry Guinea NOAA Center for Weather and Climate Prediction College Park Maryland USA Institut Supérieur des Sciences de l’Education de Guinée (ISSEG) Conakry Guinea Department of Plant and Environmental Science School of Natural Resource Copperbelt University Kitwe Zambia

The coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), dates back to December 29, 2019, in Wuhan, China. It quickly spreads like wildfire to all continents in the following months. In Guinea, the first case of COVID-19 and death were all reported respectively on March 12 and April 16, 2020. Since then, several studies have found a relationship between certain environmental conditions such as the meteorological factors to have the potential of contributing to the spread of the virus. Thus, this study aims at examining the extent to which observed meteorological factors might have contributed to the spread of the coronavirus disease 2019 (COVID-19) cases in Conakry, from March 1 to May 31, 2020. Meteorological factors such as temperature (Tmin, Tmean and Tmax) and relative humidity (RHmin, RHmean and RHmax) were analyzed together with the data on the COVID-19. The dynamic of the COVID-19 in Guinea was analyzed along with that of some west African countries. The analysis on the dynamic of the COVID-19 pandemic in West Africa indicated Guinea as one of the most affected countries by the pandemic after Nigeria and Ghana. The study found that in general an increase in the temperature is linked to a decline in the COVID-19 number of cases and deaths, while an increase in the humidity is positively correlated to the number of cases and deaths. Nevertheless,

关键词： Conakry Guinea COVID-19 Meteorological Factors Temperature Humidity

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Prevalence and Contributing Factors of Orthostatic Hypotension in the Cardiology Department of the CHU Ignace Deen in Conakry

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World Journal of Cardiovascular Diseases 2023年第3期13卷 181-187页

作者： ibrahima Sory Barry El Hadj Yaya Baldé Ahmed Youssouf Djiba Mariama Béavogui Mamadou Bassirou Mariama Bah Morlaye Soumaoro Abdoulaye Camara Aly Samoura Diarra Koïvogui Kokoulo Koïvogui Salématou Diallo ibrahima kalil Tounkara Ousmane Djénaba Savané Mamadou Dadhi Baldé Department of Cardiology CHU Ignace Deen Conakry Guinea

Introduction: Orthostatic Hypotension (OH) is a frequent situation during consultation in hypertensive patients. The prevalence in the general population increases with age and it is recommended to systematically search for it in patients with multiple comorbidities. The objective of this study was to determine the prevalence of orthostatic hypotension;describe their socio- demographic profile, the various clinical and paraclinical aspects and the predisposing factors of orthostatic hypotension in treated hypertensives, controlled or not. Method: This was a descriptive cross-sectional study, from January 2 to June 30, 2022 in the cardiology department of the Ignace Deen National Hospital. Included in this study were all patients who presented with orthostatic hypotension under antihypertensive treatment, regardless of age and sex, and who agreed to participate in the study. The non-inclusion criteria were hypertensive patients without OH and those who had not agreed to participate in the study. Each patient had blood pressure and heart rate measured in the supine position at room temperature and with an empty bladder. Then the measurement is taken again three (3) minutes after the switch to orthostatism. We retained the diagnosis of OH if the SBP drops by at least 20 mmHg and/or the PAD by at least 10 mmHg three (3) min after the transition to orthostatism. Our data obtained were analyzed in the Epi-info 7.4.0 software. Results: During our study period, we investigated 385 presented with OH, 12.2%. The mean age of the patients was 60.83 years ± 10.01 years and hypertensive patients, 47 of whom the M/F sex ratio was 0.81. In our study, blood pressure was not controlled in 36.2% of our patients with a predominance of grade 3 hypertension, a rate of 55.32%. Renal failure, anemia, heart failure and stroke were the main comorbidities associated with the occurrence of HO. The most incriminated factors were age with a frequency of 74.47%, followed by obesity at 44.68% and

关键词： Orthostatic Hypotension Contributing Factors Conakry

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