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B-DRIVE:A blockchain based distributed IoT network for smart urban transportation

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Blockchain(Research and Applications) 2021年第4期2卷 37-48页

作者： mohammed Zia GIScience Chair Institute of GeographyUniversity of HeidelbergHeidelberg69120Germany

In this paper,I present B-DRIVE—a blockchain-based distributed IoT(Internet of Things)network for smart urban *** network is designed to connect a large fleet of IoT devices,installed on various vehicles and roadside infrastructures,to distributed data storage centers,called as Full-Nodes,to log and disseminate sensor generated *** connects devices from around the city to multiple Full-Nodes to log timestamped data into the *** sensors vary from GPS(Global Positioning System),air quality meter,gyrometer to speed cameras in order to facilitate efficient urban *** three identified hardware layers that comprise the network are the IoT layer,Storage layer,and User *** consist of Moving/Static-Nodes,Full-Nodes,and Smart devices,*** Moving/Static-Nodes are primarily made up of moving vehicles and road-side infrastructures,respectively,thus acting as various data ***,Full-Nodes and Smart devices are institutions and mobile phones,acting as data handler/disseminator and navigator/data visualizer,*** data,or data blocks,received by Full-Nodes get appended into Full and Running-Blockchain,meant for specific *** network is designed to be free from any block mining *** provides open access to anonymous sensor data to end-users,especially scientists,policy-makers and entrepreneurs,to develop innovative urban transportation *** is believed that a system like B-DRIVE,along with existing VANETs(Vehicular Ad-hoc NETworks),is capable of answering some of the current urban transportation issues around traffic congestion,navigation,and vehicle *** applications of blockchain data could vary from user activity mapping to VGI(volunteered geographic information)data quality *** identified limitations of the presented architecture are the low processing power of current IoT devices and the lack of urban IoT infrastructure.

关键词： Blockchain Open data Urban traffic Internet of Things Vehicle navigation

A statistical approach for enhancing security in VANETs with efficient rogue node detection using fog computing

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Digital Communications and Networks 2022年第5期8卷 814-824页

作者： Anirudh Paranjothi mohammed Atiquzzaman School of Computer Science University of OklahomaNormanOKUSA

Rogue nodes broadcasting false information in beacon messages may lead to catastrophic consequences in Vehicular Ad Hoc Networks(VANETs).Previous researchers used cryptography,trust scores,or past vehicle data to detect rogue nodes;however,these methods suffer from high processing delay,overhead,and False–Positive Rate(FPR).We propose herein Greenshield's traffic model–based fog computing scheme called Fog–based Rogue Node Detection(F–RouND),which dynamically utilizes the On–Board Units(OBUs)of all vehicles in the region for rogue node *** aim to reduce the data processing delays and FPR in detecting rogue nodes at high vehicle *** performance of the F–RouND framework was evaluated via *** show that the F–RouND framework ensures 45%lower processing delays,12%lower overhead,and 36%lower FPR at the urban scenario than the existing rogue node detection schemes even when the number of rogue nodes increases by up to 40%in the region.

关键词： VANETs Rogue nodes Fog computing Intrusion detection

Robust Admissibility and Stabilization of Uncertain Singular Fractional-Order Linear Time-Invariant Systems

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IEEE/CAA Journal of Automatica Sinica 2019年第3期6卷 685-692页

作者： Saliha Marir mohammed Chadli IEEE University Mohamed Boudiaf USTO University of Picardie Jules Verne

This paper addresses the robust admissibility problem in singular fractional-order continuous time systems. It is based on new admissibility conditions of singular fractional-order systems expressed in a set of strict linear matrix inequalities(LMIs). Then, a static output feedback controller is designed for the uncertain closed-loop system to be admissible. Numerical examples are given to illustrate the proposed methods.

关键词： Control fractional-order systems linear matrix inequalities (LMIs) output feedback control robust admissibility singular systems uncertain systems

The PCDD/PCDF Dioxin Releases in the Climate of Environment of Jordan in the Period (2000-2008)

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Journal of Thermal Science 2010年第2期19卷 182-192页

作者： mohammed Awwad Al-Dabbas Mechanical Engineering department Mutah University

Many environment problems of the full using of several categories of processing include mining,heat generators,direct combustion of forest fires,cement production,power plant,transport,medical ***/furan releases from these categories are one of these environment *** lines of reducing the PCDD/PCDF (Polychlorinated dibenzo-para-dioxins/Polychlorinated dibenzofurans) releases from these categories are *** contribution of this paper is present the identification and estimation of the latest figure of dioxin/furan releases in the climate of environment of Jordan in the period 2000-2008 from the following categories (cement,aluminum,ceramic,medical waste,power plant,land fill,ferrous and non-ferrous metals,uncontrolled combustion process (biomass burning,waste burning,accidental fires in house,transport).These finding shows the sign of growth of estimated PCDD/PCDF releases from categories which did not calculated and followed after *** result shows the highest PCDD/PCDF release from landfill fires (62.75 g TEQ/year),medical waste (8.8264 g TEQ/year),and transport (3.0145 g TEQ/year).Jordan seeks by next years,a reduction in total releases of dioxins and furans from sources resulting from human *** challenge will apply to the aggregate of releases to the air nationwide and of releases to the water within the Jordan *** should conduct air monitoring for dioxin in order to track fluctuations in atmospheric deposition levels.

关键词： Jordan transport sector PCB dioxin & furan POP PCDD/PCDF power plant biogas

Relative Degree Structural Hole Centrality, CRD-SH: A New Centrality Measure in Complex Networks

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Journal of Systems Science & Complexity 2019年第5期32卷 1306-1323页

作者： SOTOODEH Hamidreza FALAHRAD mohammed Institute for Research in Fundamental Sciences(IPM) School of Computer ScienceTehranIran Qazvin Islamic Azad University Department of Computer EngineeringQazvinIran.

In order to assess influential nodes in complex networks, the authors propose a novel ranking method based on structural hole in combination with the degree ratio of a node and its neighbors. The proposed method is a response to the limitations of other proposed measures in this field. The structural hole gives a comprehensive attention of the information about the node topology in relation to its neighbors, whereas the degree ratio of nodes reflects its significance against the *** of the two aforementioned measures summarized in the structural hole leverage matrix demonstrates the importance of a node according to its position in the network structure. So a more accurate method for ranking influential nodes is established. The simulation results over different-scale networks(small networks with less than 30 nodes, medium networks with less than 150 nodes and large networks with more than 1000 nodes) suggest that the proposed method can rank important nodes more effectively and precisely in complex networks specifically in larger ones.

关键词： Centrality measures complex networks influential nodes structural hole leverage matrix

Tuning the electronic structure of the earth-abundant electrocatalysts for oxygen evolution reaction(OER)to achieve efficient alkaline water splitting-A review

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Journal of Energy Chemistry 2021年第5期30卷 299-342页

作者： mohammed-Ibrahim Jamesh Moussab Harb Department of Physics and Materials Science City University of Hong KongTat Chee AvenueKowloonHong KongChina Applied and Plasma Physics School of Physics(A28)University of SydneySydneyNSW 2006Australia KAUST Catalysis Center(KCC) Physical Sciences and Engineering Division(PSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Tuning the electronic structure of the electrocatalysts for oxygen evolution reaction(OER)is a promising way to achieve efficient alkaline water splitting for clean energy production(H2).At first,this paper introduces the significance of the tuning of electronic structure,where modifying the electronic structure of the electrocatalysts could generate active sites having optimal adsorption energy with OER intermediates,and that could diminish the energy barrier for OER,and that could improve the activity for ***,this paper reviews the tuning of electronic structure along with catalytic performances,synthetic methodologies,chemical properties,and DFT calculations on various nanostructured earth-abundant electrocatalysts for OER in alkaline ***,this review discusses the tuning of the electronic structure of the several nanostructured earth-abundant electrocatalysts including oxide,(oxy)hydroxide,layered double hydroxide,alloy,metal phosphide/phosphate,nitride,sulfide,selenide,carbon containing materials,MOF,core-shell/hetero/hollow structured materials,and materials with vacancies/defects for OER in alkaline environment(including activity:overpotential(η)of ≤200 mV at10 m A cm^(-2);stability:≥100 h;durability:≥5000 cycles).Then,this review discusses the robust stability of the electrocatalysts for OER towards practical ***,this review discusses the in situ formation of thin layer on the catalyst surface during *** addition,this review discusses the influence of the adsorption energy of the OER intermediates on OER performance of the ***,this review summarizes the various promising strategies for tuning the electronic structure of the electrocatalysts to achieve enhanced performance for OER in alkaline environment.

关键词： OER electrocatalyst Electrochemical water splitting Earth abundant electrocatalyst Hydrogen energy

Secure Multifactor Remote Access User Authentication Framework for IoT Networks

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Computers, Materials & Continua 2021年第9期68卷 3235-3254页

作者： mohammed Mujib Alshahrani College of Computing and Information Technology The University of BishaSaudi Arabia

The term IoT refers to the interconnection and exchange of data among devices/*** devices are often small,low cost,and have limited *** IoT issues and challenges are growing *** and privacy issues are among the most important concerns in IoT applications,such as smart *** cybersecurity attacks are the attacks which do not require physical access to the IoT networks,where the attacker can remotely access and communicate with the IoT devices through a wireless communication ***,remote cybersecurity attacks are a significant *** applications in smart environments such as smart buildings require remote access for both users and *** the user/building communication channel is insecure,a lightweight and secure authentication protocol is *** this paper,we propose a new secure remote user mutual authentication protocol based on transitory identities and multi-factor authentication for IoT smart building *** protocol ensures that only legitimate users can authenticate with smart building controllers in an anonymous,unlinkable,and untraceable *** protocol also avoids clock synchronization problem and can resist quantum computing *** security of the protocol is evaluated using two different methods:(1)informal analysis;(2)model check using the automated validation of internet security protocols and applications(AVISPA)*** communication overhead and computational cost of the proposed are *** security and performance analysis show that our protocol is secure and efficient.

关键词： Internet of things threats smart building attacks remote access authentication smart buildings

Laparoscopic Rectopexy;Is It Useful for Persistent Rectal Prolapse in Children?

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Surgical Science 2014年第3期5卷 128-133页

作者： medhat M. Ibrahim mohammed Abd El Razik Ahmed M. Abdelkader General Surgery Unite RCMC Yanbu Industrial City KSA Pediatric Surgery Unit Faculty of Medicine Al-Azhar University Nasr City Cairo Egypt

Introduction: Rectal prolapse is a relatively common, usually self-limiting illness in children. Peak incidence is between 1 and 3 years. The intervention is required for the persistent rectal prolapse (PRP). Only scanty experience is available with laparoscopic rectopexy in children. There is no available work using both mesh and suture laparoscopic rectopexy in literature. This work is unique that it presents our clinical experience with both mesh and suture laparoscopic rectopexy in children. This is a prospective clinical study for the outcome of laparoscopic rectopexy (LRP) by both mesh and suture technique in children with persistent rectal prolapse (PRP). Materials and Methods: Fourteen cases of PRP were managed with LRP from February 2008 to August 2012. Results: Of the 14 children, 10 (71.42%) were males and 4 (28.57%) were females. Male to female ratio was 2:1. The mean age of presentation was 5 years (range 3 - 8 years). The presenting complaints were mass descending per rectum along with bleeding per rectum lasting from 1 to 3 years. All had rectal prolapse of 5 - 7 cm in length. 12 out of 14 children had recurrence even after sclerotherapy before referral to laparoscopic rectpexy. The mean duration of surgery was 30 minutes (range 20 - 60 minutes). No intraoperative complications were reported;only one case got constipation and was managed conservatively and no recurrence. Conclusion: LRP is safe, feasible in children and gives satisfactory results after failure of all conservative even sclerotherapy injection.

关键词： Rectal Prolapse Laparoscopy Rectopexy

Fabrication and characterization of gold nano particles for DNA biosensor applications

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Chinese Chemical Letters 2016年第5期27卷 801-806页

作者： Ahmed Mishaal mohammed Chemistry Department College of Science Anbar University Institutes of Nano Electronic Engineering University Malaysia Perlis

This research involves the preparation ofa biosensor using silicon oxide for biomedical applications, and its effective use for the detection of target DNA hybridization. An electrochemical DNA biosensor was successfully fabricated by using （3-aminopropyl） tri-ethoxysilane （APTES） as a linker molecule combined with gold nanoparticles （GNPs） on a thermally oxidized 5i02 thin film. The size of the GNPs was calculated by utilizing UV-vis data with an average calculated particle size within the range of 30 - 5 nm, and characterization by transmission electron microscopy （TEM） and atomic force microscopy （AFM）. The GNP-modified SiO2 thin films were electrically characterized through the measurement of capacitance, permittivity and conductivity using a low-cost dielectric analyzer. The capacitance, permittivity and conductivity profiles of the fabricated sensor clearly differentiated DNA immobilization and hybridization.

关键词： Gold nanoparticlesElectrochemical DNA hybridization Dielectric analyzer