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MADCR:Mobility Aware Dynamic Clustering-Based Routing Protocol in Internet of Vehicles

China Communications 2021年第7期18卷 69-85页

作者： Sankar Sennan Somula Ramasubbareddy Sathiyabhama Balasubramaniyam Anand Nayyar chaker abdelaziz kerrache Muhammad Bilal Deparment of of Computer Science and Engineering Sona College of TechnologySalem 636005India Deparment of Information Technology VNR Vignana Jyothi Institute of Engineering and TechnologyHyderabad 500090India. Graduate School Duy Tan UniversityDa Nang 550000Vietnam Faculty of Information Technology Duy Tan UniversityDa Nang 550000Vietnam Laboratoire d’Informatique et de Mathématiques UniversitéAmar Telidji de LaghouatLaghouatAlgeria. Department of Computer Engineering Hankuk University of Foreign Studies17035Yongin-SiSouth Korea

Internet of Vehicles(IoV)is an evolution of the Internet of Things(IoT)to improve the capabilities of vehicular ad-hoc networks(VANETs)in intelligence transport *** network topology in IoV paradigm is highly *** is one of the promising solutions to maintain the route stability in the dynamic ***,existing algorithms consume a considerable amount of time in the cluster head(CH)selection ***,this study proposes a mobility aware dynamic clustering-based routing(MADCR)protocol in IoV to maximize the lifespan of networks and reduce the end-to-end delay of *** MADCR protocol consists of cluster formation and CH selection processes.A cluster is formed on the basis of Euclidean *** CH is then chosen using the mayfly optimization algorithm(MOA).The CH subsequently receives vehicle data and forwards such data to the Road Side Unit(RSU).The performance of the MADCR protocol is compared with that ofAnt Colony Optimization(ACO),Comprehensive Learning Particle Swarm Optimization(CLPSO),and Clustering Algorithm for Internet of Vehicles based on Dragonfly Optimizer(CAVDO).The proposed MADCR protocol decreases the end-toend delay by 5–80 ms and increases the packet delivery ratio by 5%–15%.

关键词： clustering protocol Internet of things Internet of vehicles optimization algorithm Mayfly algorithm

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The case of HyperLedger Fabric as a blockchain solution for healthcare applications

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Blockchain(Research and Applications) 2021年第1期2卷 41-55页

作者： McSeth Antwi Asma Adnane Farhan Ahmad Rasheed Hussain Muhammad Habib ur Rehman chaker abdelaziz kerrache Networks and System Research Theme Loughborough UniversityLoughboroughLE113TTUK Systems Security Group Coventry UniversityCoventryCV15FBUK Institute of Information Security and Cyber-Physical Systems Innopolis UniversityInnopolis420500Russia Center for Cyber Physical Systems Khalifa UniversityAbu Dhabi127788United Arab Emirates Laboratoire d’Informatique et de Mathematiques Universite de LaghouatLaghouat03000Algeria

The healthcare industry deals with highly sensitive data which must be managed in a secure *** Health Records(EHRs)hold various kinds of personal and sensitive data which contain names,addresses,social security numbers,insurance numbers,and medical *** personal data is valuable to the patients,healthcare service providers,medical insurance companies,and research ***,the public release of this highly sensitive personal data poses serious privacy and security threats to patients and healthcare service ***,we foresee the requirement of new technologies to address the privacy and security challenges for personal data in healthcare *** is one of the promising solutions,aimed to provide transparency,security,and privacy using consensus-driven decentralised data management on top of peer-to-peer distributed computing ***,to solve the mentioned problems in healthcare applications,in this paper,we investigate the use of private blockchain technologies to assess their feasibility for healthcare *** create testing scenarios using HyperLedger Fabric to explore different criteria and use-cases for healthcare ***,we thoroughly evaluate the representative test case scenarios to assess the blockchain-enabled security criteria in terms of data confidentiality,privacy and access *** experimental evaluation reveals the promising benefits of private blockchain technologies in terms of security,regulation compliance,compatibility,flexibility,and scalability.

关键词： blockchain Electronic healthcare records Feasibility study Healthcare Privacy Security Use-case

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SAFT-VNDN: A Socially-Aware Forwarding Technique in Vehicular Named Data Detworking

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Computers, Materials & Continua 2022年第11期73卷 2495-2512页

作者： Amel Boudelaa Zohra Abdelhafidi Nasreddine Lagraa chaker abdelaziz kerrache Muhammad Bilal Daehan Kwak Mohamed Bachir Yagoubi Laboratoire d’Informatique et de Mathématiques UniversitéAmar Telidji de LaghouatLaghouatAlgeria Department of Computer and Electronics Systems Engineering Hankuk University of Foreign StudiesYongin-si17035Gyeonggi-doKorea School of Computer Science and Technology Kean UniversityNJUSA

Vehicular Social Networks(VSNs)is the bridge of social networks and Vehicular Ad-Hoc Networks(VANETs).VSNs are promising as they allow the exchange of various types of contents in large-scale through Vehicle-to-Vehicle(V2V)and Vehicle-to-Infrastructure(V2I)communication *** Named Data Networking(VNDN)is an auspicious communication paradigm for the challenging VSN environment since it can optimize content dissemination by decoupling contents from their physical ***,content dissemination and caching represent crucial challenges in VSNs due to short link lifetime and intermittent connectivity caused by vehicles’high *** aim with this paper is to improve content delivery and cache hit ratio,as well as decrease the transmission delay between *** this regard,we propose a novel hybrid VNDN-VSN forwarding technique based on social communities,which allows requester vehicles to easily find the most suitable forwarder or producer among the community members in their neighborhood ***,we introduce an effective caching mechanism by dividing the content store into two parts,one for community private contents and the second one for public *** results show that our proposed forwarding technique can achieve a favorable performance compared with traditional VNDN,in terms of data delivery ratio,average data delivery delay,and cache hit ratio.

关键词： Vehicular Social Networks(VSNs) Vehicular Named Data Networking forwarding technique social communities

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Fixed Point Theorems for(p, q)-Quasi-Contraction Mappings in Cone Metric Spaces

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Chinese Annals of Mathematics,Series B 2016年第2期37卷 211-220页

作者： Wajdi chaker abdelaziz GHRIBI Aref JERIBI Bilel KRICHEN Higher Institute of Applied Biology Medenine El Jorf Road Km 22MedenineTunisia Higher Institute of Business Administration of Sfax Airport Road Km 4 B.P.N1013 3018 B.P.1013SfaxTunisia Department of Mathematics Faculty of Science of SfaxSoukra Road Km 3.5B.P.11713000SfaxTunisia Department of Mathematics Preparatory Engineering InstituteMenzel Chaker Road Km 0.5B.P.1172-3018SfaxTunisia

In this work, the authors introduce the concept of(p, q)-quasi-contraction mapping in a cone metric space. We prove the existence and uniqueness of a fixed point for a(p, q)-quasi-contraction mapping in a complete cone metric space. The results of this paper generalize and unify further fixed point theorems for quasi-contraction, convex contraction mappings and two-sided convex contraction of order 2.

关键词： Fixed points (p q)-Quasi-contractions Cone metric space

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New multi-objective approach for dynamic risk-driven intrusion responses

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Frontiers of Computer Science 2020年第1期14卷 230-232页

作者： chaker KATAR Ahmed BADREDDINE LARODEC Institut Supérieur de Gestion de Tunis 2000 Le BardoTunisia

1 Introduction Several active intrusion response mechanisms have been designed and prototyped,They adapt well to specificities of the monitored system,though they lack explicit and clear pro-cesses to select new security controls or evaluate existing ***,they have never considered risk models as recommended by ISO 27002 and ISO 27005 to assess and mitigate risks of mounted attacks[1,2].Additionally,they have several drawbacks in cost factor assessment as well as in countermeasure selection.

关键词： intrusion mounted dynamic

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Microwave irradiation: Novel and facile methods for the synthesis of new pyrimidinones

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Chinese Chemical Letters 2014年第8期25卷 1207-1210页

作者： Aida chaker Fathi Zribi Franoise Nepveu Fakher Chabchoub Department of Chemistry University of Sfax Road Soukra km 4-3000 SfaxTunisia UPS UMR 152 PHARMA-DEV University of Toulouse III 118 road of Narbonne F-31062 Cedex 9 Toulouse France Department of Chemistry University of Sfax Road Soukra km 4-3000 Sfax Tunisia IRD UMR 152 F-31062 Cedex 9 Toulouse France

We describe here a rapid process for the preparation of new 9-chloromethyl-12-aryl-10,12-dihydrobenzo[5,6]chromeno[2,3-d]pyrimidin-11-ones 5a-d and 10-chloromethyl-7-aryl-7,9-dihydrobenzo[7,8]chromeno[2,3-d]pyrimidin-8-ones 6a-d by two different methods utilizing microwave irradiation. This methodology provides better yields（72%–80%） and high purity of the title compounds.

关键词： Microwave-irradiation Aminonitriles naphtopyraniques Chloroacetylchloride Pyrimidinones

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XUV Spectroscopy of Subpicosecond Laser Produced Plasmas

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Chinese Physics Letters 1994年第9期11卷 554-557页

作者： JIANG Zhiming J.C.Kieffer M.chaker On leave from Shanghai Institute of Optics and Fine Mechanics Academia SinicaShanghai 201800 Institute National de la RecherchèScientifique INRS-énergie et matérauxC.P.1020VarennesQuebecCanada J3X 1S2

The keV and XUV spectra of plasmas produced by the interaction of a laser pulse of various duration and wavelengths with,a solid Al target are compared and *** decrease of the XUV emission from the high ionization states was observed with the shortest pulses(500fs)and the shortest wavelength(0.5μm),which may be due to rapid cooling and quenching of ultrashort-lived and initially ultra-dense plasmas.

关键词： ultrashort shortest picosecond

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Supplemental feeding on rangelands:new dynamics of the livestock in the El Ouara rangelands in southern Tunisia

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Regional Sustainability 2023年第4期4卷 359-368页

作者： Houda RJILI Mohamed JAOUAD chaker SELMI Laboratory of Economy and Rural Societies Arid Regions Institute(IRA)MedenineGabes UniversityMedenine4119Tunisia National Agronomic Institute of Tunis(INAT) University of CarthageTunis1082Tunisia

Fodder production in arid rangelands has been traditionally considered as the main source of nutrition for ***,the production of these fodder may be influenced by some socio-economic and climatic *** study aims to identify the various rangeland use forms and determine the types of livestock feeding system in the El Ouara rangelands of Ben guarden District in southern Tunisia by analysing the importance of supplemental feeding and main determinants of this *** were collected by a survey that targeted a sample of 50 breeders in the El Ouara *** statistics and binary logistic regression were used to analyse the *** results showed that there are two types of association practiced by breeders:“Cherka”association practiced by 10.00% of breeders and cash payment association practiced by 53.00% of ***,transhumance,sedentary,and semi-urban forms are the main ways in which breeders use the *** are four livestock feeding systems in the El Ouara rangelands being used to feed livestock:natural rangeland,rangeland-based,mixed,and concentrate-based feeding *** feeding has become fundamental for the livestock feeding system in the El Ouara *** breeders with the largest camel size still use the natural rangeland feeding system,while the breeders who have the largest herd size practice the mixed feeding *** logistic regression results reveal that breeder age,cereal area,herd size,migrant remittance,second activity,and agricultural development group membership can significantly impact the supplemental *** summary,this study can help policy-makers plan innovative practices based on climatic change,ensure the sustainability of livestock feeding system,and make effective decisions for local development.

关键词： Livestock feeding system Supplemental feeding Rangeland use forms “Cherka”association Cash payment association El Ouara rangelands

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Characterization and physicochemical aspects of novel cellulose-based layered double hydroxide nanocomposite for removal of antimony and fluoride from aqueous solution

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Journal of Environmental Sciences 2021年第4期33卷 301-315页

作者： Hanen Bessaies Sidra Iftekhar Muhammad Bilal Asif Jamel Kheriji chaker Necibi Mika Sillanpää Bechir Hamrouni Laboratory of Desalination and Water Treatment LR19ES01 Faculty of Sciences of TunisTunis El Manar UniversityEl Manar I 2092Tunisia Department of Environmental Engineering University of Engineering and Technology TaxilaTaxila 47050Pakistan Department of Applied Physics University of Eastern FinlandKuopio 70210Finland A lnstitute of Environmental Engineering and Nano-Technology Tsinghua Shezhen International Graduate SchoolTsinghua UniversityShenzhen 518055China International Water Research Institute Mohammed VI Polythechnic UniversityGreen City Ben Guerir 43150Morocco Institute of Research and Development Duy Tan UniversityDa Nang 550000Vietnam Faculty of Environment and Chemical Engineering Duy Tan UniversityDa Nang 550000Vietnam School of Civil Engineering and Surveying Faculty of HealthEngineering and SciencesUniversity of Southern QueenslandWest StreetToowoombaQLD 4350Australia Department of Chemical Engineering School of MiningMetallurgy and Chemical EngineeringUniversity of JohannesburgDoornfontein 2028South Africa

A series of novel adsorbents composed of cellulose(CL)with Ca/Al layered double hydroxide(CC_(x)A;where x represent the Ca/Al molar ratio)were prepared for the adsorption of antimony(Sb(V))and fluoride(F^(-))ions from aqueous *** CC_(x)A was characterized by Fourier-transform infrared spectroscopy(FTIR),Brunauer–Emmett–Teller(BET),elemental analysis(CHNS/O),thermogravimetric analysis(TGA-DTA),zeta potential,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy with energy dispersive Xray spectroscopy(SEM-EDX)*** effects of varying parameters such as dose,pH,contact time,temperature and initial concentration on the adsorption process were *** to the obtained results,the adsorption processes were described by a pseudo-second-order kinetic *** adsorption isotherm model provided the best fit for the experimental data and was used to describe isotherm *** maximum adsorption capacity was found to be 77.2 and 63.1 mg/g for Sb(V)and F^(-),respectively by CC_(3)A(experimental conditions:pH 5.5,time 60 min,dose 15 mg/10 mL,temperature 298 K).The CC_(3)A nanocomposite was able to reduce the Sb(V)and F^(-)ions concentration in synthetic solution to lower than 6μg/L and 1.5 mg/L,respectively,which are maximum contaminant levels of these elements in drinking water according to WHO guidelines.

关键词： Layered double hydroxide Adsorption Antimony removal Fluoride removal Kinetics

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Synthesis of novel adsorbent by intercalation of biopolymer in LDH for the removal of arsenic from synthetic and natural water

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Journal of Environmental Sciences 2020年第5期32卷 246-261页

作者： Hanen Bessaies Sidra Iftekhar Bhairavi Doshi Jamel Kheriji Mohamed chaker Ncibi Varsha Srivastava Mika Sillanpaa Bechir Hamrouni Laboratory of Desalination and Water Treatement LR19ES01 Faculty of Sciences of TunisTunis El Manar University2092El Manar ITunisia Department of Separation Science Lappeenranta-Lahti University of Technology(LUT)Sammonfeatu 12FI-50130MikkeliFinland International Water Research Institute MohammedⅥPolytechnic UniversityCity Ben Guerir 43150Morocco Department of Civil and Environmental Engineering Florida International UniversityMiamiFL 33174USA Department of Environmental Engineering University of Engineering and TechnologyTaxilaPakistan

This study focuses on the synthesis of nanocomposites named CCA and CZA that were prepared by the incorporation of cellulose(CL)in the Ca/Al and Zn/Al layered double hydroxide(LDH),*** materials were then used for the uptake of As(Ⅲ)and As(V)from aqueous *** of both nanocomposites(CCA and CZA)was done using FTIR and Raman analysis to identify the functional groups,N2 adsorption-desorption isotherms to determine the specific surface area and pore geometry and XPS analysis to obtain the surface atomic *** other characters were investigated using simultaneous TGA and DTA and elemental chemical analysis(CHNS/O).The crystallinity of the prepared nanocomposites was displayed by XRD ***,the sheet-like structure of the LDHs and the irregularity of surface morphology with porous structure were observed by TEM and SEM *** of maximum adsorption capacity was adjusted using different parameters including pH,contact time and adsorbent *** pseudo-second-order model was in good fitting with kinetics *** adsorption isotherm results showed that CZA exhibits better adsorption capacity for As(Ⅲ)than CCA and the Langmuir isotherm model described the data well for both *** studies illustrated the endothermic nature of CCA and exothermic nature on CZA,as well as the fact that the adsorption process is spontaneous.A real water sample collected from well located in Gabes(Tunisia),has also been *** obtained experimental results were confirmed that these sorbents are efficient for the treatment of hazardous toxic species such as.

关键词： Layered double hydroxide Adsorption Arsenic removal Kinetics Natural water treatment

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