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Flexible Global Aggregation and Dynamic Client Selection for Federated Learning in Internet of Vehicles

Computers, Materials & Continua 2023年第11期77卷 1739-1757页

作者： Tariq Qayyum Zouheir Trabelsi Asadullah Tariq Muhammad Ali kadhim hayawi Irfan Ud Din College of Information Technology United Arab Emirates UniversityAl Ain17551UAE Department of Computing School of EECSNational University of Sciences and TechnologyIslamabad44000Pakistan College of Technological Innovation Zayed UniversityAbu Dhabi144534UAE Department of Computer Science The Superior UniversityLahore54000Pakistan

Federated Learning(FL)enables collaborative and privacy-preserving training of machine learning models within the Internet of Vehicles(IoV)*** FL effectively tackles privacy concerns,it also imposes significant resource *** traditional FL,trained models are transmitted to a central server for global aggregation,typically in the *** approach often leads to network congestion and bandwidth limitations when numerous devices communicate with the same *** need for Flexible Global Aggregation and Dynamic Client Selection in FL for the IoV arises from the inherent characteristics of IoV *** include diverse and distributed data sources,varying data quality,and limited communication *** employing dynamic client selection,we can prioritize relevant and high-quality data sources,enhancing model *** address this issue,we propose an FL framework that selects global aggregation nodes dynamically rather than a single fixed *** global aggregation ensures efficient utilization of limited network resources while accommodating the dynamic nature of IoV data *** approach optimizes both model performance and resource allocation,making FL in IoV more effective and *** selection of the global aggregation node is based on workload and communication speed ***,our framework overcomes the constraints associated with network,computational,and energy resources in the IoV environment by implementing a client selection algorithm that dynamically adjusts participants according to predefined *** approach surpasses Federated Averaging(FedAvg)and Hierarchical FL(HFL)regarding energy consumption,delay,and accuracy,yielding superior results.

关键词： IoT Federated Learning sensors IoV OMNeT++ edge computing

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Overall Assessment of Heat Transfer for a Rarefied Flow in a Microchannel with Obstacles Using Lattice Boltzmann Method

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工程与科学中的计算机建模(英文) 2024年第1期138卷 273-299页

作者： Siham Hammid Khatir Naima Omolayo M.Ikumapayi Cheikh Kezrane Abdelkrim Liazid Jihad Asad Mokdad hayawi Rahman Farhan Lafta Rashid Naseer Ali Hussien Younes Menni Laboratory of Development in Mechanics and Materials(LDMM) Zian Achour UniversityDjelfaPB 3117Algeria Department of Technology University Center Salhi Ahmed Naama(Ctr.Univ.Naama)P.O.Box 66Naama45000Algeria Department of Mechanical and Mechatronics Engineering Afe Babalola University Ado Ekiti360101Nigeria Departement of Physics Faculty of ScienceAbou Bekr Belkaid UniversityTlemcen13000Algeria Department of Physics Faculty of Applied SciencesPalestine Technical University-KadoorieTulkarmPalestine Aeronautical Technical Engineering Al-Farahidi UniversityBaghdad10011Iraq Mechanical Engineering Department University of KerbalaKarbala56001Iraq Information and Communication Technology Research Group Scientific Research CenterAl-Ayen UniversityThi-QarIraq National University of Science and Technology Dhi QarIraq

The objective of this investigation is to assess the effect of obstacles on numerical heat transfer and fluid flow momentum in a rectangular microchannel(MC).Two distinct configurations were studied:one without obstacles and the other with alternating obstacles placed on the upper and lower *** research utilized the thermal lattice Boltzmann method(LBM),which solves the energy and momentum equations of fluids with the BGK approximation,implemented in a Python coding *** jump and slip velocity conditions were utilized in the simulation for the MC and extended to all obstacle *** study aims to analyze the rarefaction effect,with Knudsen numbers(Kn)of 0.012,0.02,and *** outcomes indicate that rarefaction has a significant impact on the velocity and temperature *** presence of nine obstacles led to slower fluid movement inside the microchannel MC,resulting in faster cooling at the *** MCs with obstacles,the rarefaction effect plays a crucial role in decreasing the Nusselt number(Nu)and skin friction coefficient(Cf).Furthermore,the study demonstrated that the obstacles played a crucial role in boosting fluid flow and heat transfer in the *** findings suggest that the examined configurations could have potential applications as cooling technologies in micro-electro-mechanical systems and microdevice applications.

关键词： Microfluid rarefied flow LBM microchannel Knudsen number numerical simulation

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Postoperative complications of colectomy and J- pouch with ileostomy versus without ileostomy in children with inflammatory bowel diseases: a systematic review and meta- analysis

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World Journal of Pediatric Surgery 2022年第2期5卷 38-45页

作者： Irina Oltean Nicole Travis Manvinder Kaur Viviane Grandpierre Lamia hayawi Anne Tsampalieros Ahmed Nasr Department of Surgery Children's Hospital of Eastern OntarioOttawaOntarioCanada Children's Hospital of Eastern Ontario Research Institute Clinical Research UnitOttawaOntarioCanada University of Ottawa OttawaOntarioCanada

Background The efficacy of performing a restorative proctocolectomy and J-pouch ileoanal anastomosis without diverting ileostomy in children with inflammatory bowel disease has been a longstanding debate.A systematic review and meta-analysis is presented comparing the occurrence of postoperative complications in children who underwent either the pouch-anal anastomosis(IPAA)with ileostomy(diverted)versus the undiverted *** Records were sourced from CINAHL,CENTRAL,EMBASE and MEDLINE *** followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and compared postoperative complications in pediatric patients diagnosed with inflammatory diseases aged less than 18 years who underwent J-pouch with ileostomy versus without *** primary outcome was the occurrence of postoperative leaks,and the secondary outcomes were presence of postoperative small bowel obstruction(SBO),pouchitis,stricture and fistula complications.A random-effects meta-analysis was *** Twenty-three observational studies in the systematic review were included with 658 patients(83%diverted,17%undiverted).Pooled estimates showed no difference in occurrence of leaks in children who underwent J-pouch/IPAA with ileostomy versus without(odds ratio(OR)0.54,95%confidence interval(CI)0.17 to 1.64,I^(2)=16%).There was no difference in the occurrence of SBO,pouchitis or strictures in children who underwent J-pouch/IPAA with ileostomy versus without(SBO:OR 2.27,95%CI 0.52 to 9.92,I^(2)=0%,pouchitis:OR 1.76,95%CI 0.95 to 3.24,I^(2)=0%,strictures:OR 2.72,95%CI 0.44 to 16.69,I^(2)=66%).Conclusion The meta-analysis did not find differences in the occurrence of complications in pediatric patients who underwent the IPAA with ileostomy procedure versus without ileostomy.

关键词： complications bowel diseases

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Quality of life outcomes in children after surgery for Hirschsprung disease and anorectal malformations:a systematic review and meta-analysis

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World Journal of Pediatric Surgery 2022年第4期5卷 204-210页

作者： Irina Oltean Lamia hayawi Victoria Larocca Vid Bijelić Emily Beveridge Manvinder Kaur Viviane Grandpierre Jane Kanyinda Ahmed Nasr Department of Surgery Children's Hospital of Eastern OntarioOttawaOntarioCanada Clinical Research Unit Children's Hospital of Eastern Ontario Research InstituteOttawaOntarioCanada

Background No systematic review and meta-analysis to date has examined multiple child and parent-reported social and physical quality of life(QoL)in pediatric populations affected by Hirschsprung’s disease(HD)and anorectal malformations(ARM).The objective of this systematic review is to quantitatively summarize the parent-reported and child-reported psychosocial and physical functioning scores of such *** Records were sourced from the CENTRAL,EMBASE,and MEDLINE *** that reported child and parent reported QoL in children with HD and ARM,regardless of surgery intervention,versus children without HD and ARM,were *** primary outcome was the psychosocial functioning scores,and the secondary outcomes were the presence of postoperative constipation,postoperative obstruction symptoms,fecal incontinence,and enterocolitis.A random effects meta-analysis was *** Twenty-three studies were included in the systematic review,with 11 studies included in the ***,1678 total pediatric patients with HD and ARM underwent surgery vs 392 healthy *** parent-reported standardized mean(SM)scores showed better social functioning after surgery(SM 91.79,95%CI(80.3 to 103.3),I2=0).The pooled standardized mean difference(SMD)showed evidence for parent-reported incontinence but not for constipation in children with HD and ARM after surgery that had a lower mean QoL score compared with the normal population(SMD−1.24(-1.79 to–0.69),I2=76%and SMD−0.45,95%CI(−1.12 to 0.21),I2=75%).The pooled prevalence of child-reported constipation was 22%(95%CI(16%to 28%),I2=0%).The pooled prevalence of parent-reported postoperative obstruction symptoms was 61%(95%CI(41%to 81%),I2=41%).Conclusion The results demonstrate better social functioning after surgery,lower QoL scores for incontinence versus controls,and remaining constipation and postoperative obstruction symptoms after surgery in children with HD and ARM.

关键词： surgery Hirschsprung analysis

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