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A Secure Communication Protocol for Unmanned Aerial Vehicles

Computers, Materials & Continua 2022年第1期70卷 601-618页

作者： navid ali khan N.Z.Jhanjhi Sarfraz Nawaz Brohi Abdulwahab ali Almazroi Abdulaleem ali Almazroi School of Computer Science and Engineering(SCE) Taylor’s University Lake-side CampusSubang Jaya47500Malaysia School of Information and Technology Monash UniversityMalaysia University of Jeddah College of Computing and Information Technology at KhulaisDepartment of Information TechnologyJeddahSaudi Arabia Department of Computer Science Rafha Community CollegeNorthern Border UniversityArar91431Saudi Arabia

Mavlink is a lightweight and most widely used open-source communication protocol used for Unmanned Aerial *** UAVs and autopilot systems support it,and it provides bi-directional communication between the UAV and Ground Control *** communications contain critical information about the UAV status and basic control commands sent from GCS to UAV and UAV to *** order to increase the transfer speed and efficiency,the Mavlink does not encrypt the *** a result,the protocol is vulnerable to various security attacks such as Eavesdropping,GPS Spoofing,and *** this study,we tackle the problem and secure the Mavlink communication *** leveraging the Mavlink packet’s vulnerabilities,this research work introduces an experiment in which,first,the Mavlink packets are compromised in terms of security requirements based on our threat *** results show that the protocol is insecure and the attacks carried out are *** overcomeMavlink security,an additional security layer is added to encrypt and secure the *** encryption technique is proposed that makes the communication between the UAV and GCS *** results show that the Mavlink packets are encrypted using our technique without affecting the performance and *** results are validated in terms of transfer speed,performance,and efficiency compared to the literature solutions such as MAVSec and benchmarked with the original Mavlink *** achieved results have significant improvement over the literature and Mavlink in terms of security.

关键词： Unmanned aerial vehicles mavlink protocol drones security UAVs communication

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Microstructural analysis of marl stabilized with municipal solid waste and nano-MgO

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3258-3269页

作者： ali Ohadian navid Khayat Mehdi Mokhberi Department of Civil Engineering Ahvaz BranchIslamic Azad UniversityAhvazIran Department of Civil Engineering Estahban BranchIslamic Azad UniversityEstahbanIran

Municipal solid waste(MSW)is accumulating over elapsed time across the world,and it is observed in many projects associated with weak soils,such as ***,effective solutions to the environmental problem are *** techniques for stabilizing marl generally use substances such as lime and cement,which could exacerbate *** this,some new stabilizers,***-MgO,are *** are large quantities of marls and MSW in Shiraz City,*** present study aims to evaluate the feasibility of using nano-MgO as a green low-carbon binder to remove MSW from the environment and make construction projects more *** drained shear tests were conducted to evaluate the mechanical behaviors of the nano-MgO treated marl specimens at high normal *** marl specimens containing MSW percentages of 15%,25%,35%,and 45%and nano-MgO percentages of 0.25%,0.5%,0.75%,and 1%,were *** is found that the marl containing 15%and 25%MSW and 0.5%nano-MgO at 28-d curing can perform cation exchange and form new cementitious *** soils with merely MSW show good performance due to the removal of the kaolinite and the formation of ***,the soil with 25%MSW and 0.5%nano-MgO shows the same strength enhancement as the specimen with the optimal nano-MgO(0.75%)through the formation of dolomite,with a 20.59%increase in strain energy(SE).

关键词： Marl Shear strength Microstructure Nano-MgO Municipal solid waste(MSW)

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Morphology selective construction of β-cyclodextrin functionalized Fe3O4-Bi2WO6 nanocomposite with superior adsorptivity and visible-light-driven catalytic activity

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 561-578页

作者： Maher Darwish ali Mohammadi navid Assi Samer Abuzerr Youssef Alahmad Pharmaceutical Quality Assurance Research Centre Faculty of PharmacyIntermational CampusTehran University of Medical SciencesTehranIran Department of Pharmacy Al-Safwa University CollegeKarbalalraq Nanotechnology Research Centre Faculty of PharmacyTehran University of Medical SciencesTehranIran Department of Environmental Health Engineering Faculty of Public HealthIntermational CampusTehran University of Medical SciencesTehranIran Department of Pharmaceutical Chemistry and Drug Control Faculty of PharmacyAlbaath UniversityHomsSyria

Controlled growth of Bi2WO6 nanorods with exposed[001]facets and the fabrication of an Fe2O4-Bi2WO6 magnetic composite by a microwave-assisted polyol process,were achieved in this *** adsorp-tivity and photocatalytic performance of the composite toward sunset yellow dye degradation were greatly enhanced by the β-cyclodextrin cavities on its surface,firmly anchored through a cetyltrimethylammonium bro-mide linkage.A series of examinations and characteriza-tions were carried out to determine the influence of various factors on the morphological modulation-photocatalytic behavior of the pure Bi2WO6 prior to final *** the pH of the precursor solution impacted the formation of 0D,2D,and 3D structures;however,the presence of hexamethylenetetramine surfactant induced the development of 1D nanorod structure.A reasonable crystal growth mechanism was proposed to elucidate the formation ***,the mechanism of the activity enhancement of β-cyclodextrin functionalized Fe2O4-Bi2WO6,compared to that of the non-functiona-lized samples,could be realized with the assistance of chemical trapping experiments on sunset yellow,and was confirmed on the colorless antibiotic(sulfamethoxazole).The high performance and durability of this composite can be attributed to the facet-dependent activity,large adsorp-tion capacity due to inclusion interactions,enhanced visible light absorption,and efficient charge separation.

关键词： β-cyclodextrin Bi2WO6 shape controlled nanorod sunset yellow

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Self-Healing MXene-and Graphene-Based Composites:Properties and Applications

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Nano-Micro Letters 2023年第7期15卷 165-192页

作者： Atefeh Zarepour Sepideh Ahmadi navid Rabiee ali Zarrabi Siavash Iravani Department of Biomedical Engineering Faculty of Engineering and Natural SciencesIstinye University34396 IstanbulTürkiye Department of Medical Biotechnology School of Advanced Technologies in MedicineShahid Beheshti University of Medical SciencesTehran 19857-17443Iran Cellular and Molecular Biology Research Center Shahid Beheshti University of Medical SciencesTehran 19857-17443Iran Centre for Molecular Medicine and Innovative Therapeutics Murdoch UniversityPerthWA 6150Australia School of Engineering Macquarie UniversitySydneyNSW 2109Australia Faculty of Pharmacy and Pharmaceutical Sciences Isfahan University of Medical SciencesEsfahān 81746-73461Iran

Today,self-healing graphene-and MXene-based composites have attracted researchers due to the increase in durability as well as the cost reduction in long-time *** studies have focused on designing novel self-healing graphene-and MXenebased composites with enhanced sensitivity,stretchability,and flexibility as well as improved electrical conductivity,healing efficacy,mechanical properties,and energy conversion *** composites with self-healing properties can be employed in the field of wearable sensors,supercapacitors,anticorrosive coatings,electromagnetic interference shielding,electronic-skin,soft robotics,***,it appears that more explorations are still needed to achieve composites with excellent arbitrary shape adaptability,suitable adhesiveness,ideal durability,high stretchability,immediate self-healing responsibility,and outstanding electromagnetic ***,optimizing reaction/synthesis conditions and finding suitable strategies for functionalization/modification are crucial aspects that should be comprehensively *** and graphene exhibited superior electrochemical properties with abundant surface terminations and great surface area,which are important to evolve biomedical and sensing ***,flexibility and stretchability are important criteria that need to be improved for their future ***,the most recent advancements pertaining to the applications and properties of self-healing graphene-and MXene-based composites are deliberated,focusing on crucial challenges and future perspectives.

关键词： MXenes Graphene Self-healing materials Electromagnetic interference shielding Wearable sensors

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Investigating the Efficiency Coefficient of Pile Group in Clay Under Two-Way Lateral Load

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China Ocean Engineering 2023年第5期37卷 819-828页

作者： Kooshyar Fadayi ASIABSARY navid HADIANI Amir Hossein EGHBali Seyed Mohammad ali SADREDDINI Department of Civil Engineering Islamshahr BranchIslamic Azad UniversityIslamshahrIran

This research investigates the behavior of a 2×2 pile group under two-directional lateral loads in addition to the vertical *** three-dimensional numerical modeling based on Flac 3D software,the study examines the total bearing capacity and efficiency coefficient of the pile group,considering factors such as the angle of lateral load,relative pile spacing,and relative stiffness of the pile-soil *** findings highlight the significance of these factors in understanding and predicting the response of pile groups to changing lateral load *** results reveal that increasing the angle of the lateral load from 0°to 45°enhances both the maximum total lateral load and the efficiency coefficient of the pile *** the relative stiffness of the pile-soil system significantly increases,soil stiffening occurs and reducing the relative spacing of the piles from 7 to 3 times the diameter of the piles diminishes the influence of the pile ***,the response of the pile group to lateral loads becomes more linear,with only a slight alteration in the maximum total lateral load and the efficiency coefficient when the lateral load is angled from 0°to 45°.Conversely,increasing the relative distance between the piles,specifically from 3 to 7 times the diameter of the piles,amplifies the influence of the pile *** the maximum total lateral load and the efficiency coefficient of the pile group exhibit an observed *** provide insights for designing pile groups and optimizing their performance under lateral loading conditions.

关键词： pile group two-way lateral load load capacity efficiency coefficient Flac 3D

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Conceptual Design Process for LEO Satellite Constellations Based on System Engineering Disciplines

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 599-618页

作者： ali Salehi Mahdi Fakoor Amirreza Kosari Seyed Mohammad navid Ghoreishi Faculty of New Sciences and Technologies University of TehranTehranIran

Satellite design process is an interdisciplinary subject in which the need for collaboration among various science and engineering disciplines is ***,finding an optimal process for conceptual design of a satellite,which can optimize time and cost,is still an important *** this paper,based on system engineering approach,an optimal design process is proposed for LEO satellite *** the proposed method,design process,design sequences,and data flow are *** this regard,the conceptual design process is divided into two levels of mission(or constellation)and system(or satellite)as well as 15 main activities based on the mission profile,previous experiences of the authors,and existing ***,the relationships between these activities have been determined by considering the importance of relationships according to their ***,these relations are optimized based on design structure matrix(DSM).By utilizing this approach,system design process of a telecommunication satellite constellation in LEO is formulated in conceptual design *** and capability of the proposed approach in optimal design process of the satellite constellation are investigated by comparing the outcome with existing results in the literature.

关键词： Satellite constellation system engineering design structure matrix conceptual design

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The distance between stapedial footplate and incus in otosclerosis surgery

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Journal of Otology 2015年第1期10卷 18-20页

作者： ali Eftekharian navid Ahmady Roozbahany Somayeh Shomali Department of Otolaryngology Shahid Beheshti University of Medical Sciences Hearing Disorders Research Center Shahid Beheshti University of Medical Sciences

Background: The measurement of the piston length during stapedotomy is important and it may have significant effects on the surgical ***: To determine the piston length in a group of otosclerosis patients who underwent primary *** and methods: Between Sep 2013 and Sep 2014, 85 patients with diagnosed otosclerosis underwent primary stapedotomy. Teflon prosthesis of 0.6 mm of diameter was used in all patients. The distance between medial surface of the long process of incus and center point of the stapedial footplate measured. The piston length calculated by adding 0.25 mm for the thickness of footplate and 0.50 mm for placement of the prosthesis into the ***: The distance between stapedial foot plate and incus ranged from 3.50 to 4.50 mm. The mean distance was 3.95 ± 0.16 mm. In majority of cases(74.1%) piston length was 4.75 mm followed by 4.50 mm in 15.3% and 5.00 mm in 5.9%. Piston length was 4.25 mm in 3.5% and5.25 mm in only 1.2% of patients. There was no significant post-operative complication and air bone gap closure obtained in all ***: The most common distance between foot plate and incus is 4.00 mm. No case needed a piston longer than 5.25 mm or shorter than4.25 mm.

关键词： Otosclerosis Footplate to incus distance Piston le

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Thermal performance and entropy generation for nanofluid jet injection on a ribbed microchannel with oscillating heat flux: Investigation of the first and second laws of thermodynamics

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Chinese Journal of Chemical Engineering 2022年第2期35卷 450-464页

作者： Yu-Liang Sun Davood Toghraie Omid ali Akbari Farzad Pourfattah As’ad alizadeh navid Ghajari Mehran Aghajani School of Science Huzhou UniversityHuzhou 313000China Department of Mechanical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran Young Researchers and Elite Club Khomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran Department of Mechanical Engineering University of KashanKashanIran Department of Mechanical Engineering College of EngineeringUniversity of ZakhoZakhoIraq

In current numerical study,forced flow and heat transfer of water/NDG(Nitrogen-doped graphene)nanofluid in nanoparticles mass fractions(φ)of 0,2%and 4%at Reynolds numbers(Re)of 10,50,100 and 150 are simulated in steady *** geometry is a two-dimensional microchannel under the influence of nanofluid jet *** of inlet fluid equals with Tc=293 K and hot source of microchannel is under the influence of oscillating heat ***,in this research,the effect of the variations of attack angle of triangular rib(15°,30°,45°and 60°)on laminar nanofluid flow behavior inside the studied rectangular geometry with the ratio of L/H=28 and nanofluid jet injection is *** results indicate that the increase of Reynolds number,nanoparticles mass fraction and attack angle of rib leads to the increase of pressure *** increasing fluid viscosity,momentum depreciation of fluid in collusion with microchannel surfaces ***,the increase of attack angle of rib at higher Reynolds numbers has a great effect on this *** low Reynolds numbers,due to slow motion of fluid,variations of attack angle of rib,especially in angles of 30°,45°and 60°are almost *** increasing fluid velocity,the effect of the variations of attack angle on pressure drop becomes significant and pressure drop figures act *** general,by using heat transfer enhancement methods in studied geometry,heat transfer increases almost 25%.

关键词： Ribbed microchannel Forced heat transfer Numerical study Nanofluid Attack angle of rib

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A comprehensive review of renewable energy resources for electricity generation in Australia

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Frontiers in Energy 2020年第3期14卷 510-529页

作者： alireza HEIDARI ali ESMAEEL NEZHAD Ahmad TAVAKOLI navid REZAEI Foad H.GANDOMAN Mohammad Reza MIVEH Abdollah AHMADI Majid MALEKPOUR School of Electrical Engineering and Telecommunications The University of New South WalesSydney 2052Australia Department of Electrical Electronicand Information EngineeringUniversity of BolognaBologna 40126Italy Lloy's Register Melbourne 3000Australia Department of Electrical Engineering University of KurdistanSanandaj ***Iran Research group MOBI-Mobility Logisticsand Automotive Technology Research CenterVrije Universiteit BrusselPleinlaan 2Brussels 1050BelgiumFlanders Make 3001HaverleeBelgium MIVEH Department of Electrical Engineering Tafresh UniversityTafresh 39518-79611Iran

Recently,renewable energy resources and their impacts have sparked a heated debate to resolve the Australian energy *** are many projects launched throughout the country to improve network security and *** paper aims to review the current status of different renewable energy resources along with their impacts on society and the ***,it provides for the first time the statistics of the documents published in the field of renewable energy in *** statistics include information such as the rate of papers published,possible journals for finding relative paper,types of documents published,top authors,and the most prevalent keywords in the field of renewable energy in *** will focus on solar,wind,biomass,geothermal and hydropower technologies and will investigate the social and environmental impacts of these technologies.

关键词： renewable energy hydro energy wind power photovoltaic geothermal bioenergy

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Critical role of SDF-1/CXCR4 signaling pathway in stem cell homing in the deafened rat cochlea after acoustic trauma

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Neural Regeneration Research 2018年第1期13卷 154-160页

作者： ali Asghar Peyvandi navid Ahmady Roozbahany Hassan Peyvandi Hojjat-Allah Abbaszadeh Niloofar Majdinasab Mohammad Faridan Somayeh Niknazar Hearing Disorders Research Center Loghman Hakim Medical Center Shahid Beheshti University of Medical Sciences Tehran Iran G. Raymond Chang School Ryerson University Toronto Canada Yale University New Haven CT USA Department of Biology and Anatomical Sciences School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran Department of Occupational Health Engineering School of Health Loorestan University of Medical Sciences Khorramabad Iran

Previous animal studies have shown that stromal cell-derived factor-1 （SDF-1）/CXC chemokine receptor-4 （CXCR4） signaling pathway plays an important role in the targeted migration of bone marrow-derived mesenchymal stem cells （BMSCs） to the injured area. In the present study, we aimed to investigate the potential role of chemotactic SDF-1/CXCR4 signaling pathway in the homing of transplanted BMSCs to the injured cochlea after noise-induced hearing loss （NIHL） in a rat model. White noise exposure （110 dB） paradigm was used for hearing loss induction in male rats for 6 hours in 5 days. Distortion-product otoacoustic emission （DPOAE） responses were recorded before the experiment and post noise *** 33342-labeled BMSCs and CXCR4 antagonist （AMD3100）-treated BMSCs were injected into the rat cochlea through the round window. SDF-1 protein expression in the cochlear tissue was assayed using western blot assay. The number of labeled BMSCs reaching the endolymph was determined after 24 ***-1 was significantly increased in the cochlear tissue of rats in the noise exposure group than in the control group. The number of Hoechst 33342-labeled BMSCs reaching the endolymph of the cochlea was significantly smaller in the AMD3100-treated BMSCs group than in the normal BMSCs group. Our present findings suggest that the SDF-1/CXCR4 signaling pathway has a critical role in BMSCs migration to the injured cochlea in a rat model of noise-induced hearing loss.

关键词： nerve regeneration stem cells migration SDF-1/ CXCR4 axis noise-induced hearing loss neural regeneration

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