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C1C2 Wiring and Posttraumatic Atlantoaxial Dislocation: An Effective and Cheap Surgical Procedure in a Developing Country

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Surgical Science 2024年第5期15卷 357-370页

作者： Ibrahim Dao Massimiliano Visocchi Salah Sow John Jabang Ousmane Ouattara Astride Somda Abdoulaye Sanou Elie Dibloni Nassoum Arsène Tossou Narcisse Ouedraogo Frédéric Bako Massadiami Soulama Malick Diallo Patrick Wendpouiré hamed Dakouré Department of Neurosurgery University Hospital Souro Sanou Nazi Boni University Bobo Dioulasso Burkina Faso High Institute of Health Sciences Nazi Boni University Bobo Dioulasso Burkina Faso Military Hospital Colonel Major Tanguet Ouattara Bobo Dioulasso Burkina Faso Institute of Neurosurgery Craniovertebral Junction Surgery Unit School of Medicine Catholic University Rome Italy Department of Radiology and Medical Imaging University Hospital Yalgado Ouedraogo Joseph Ki-Zerbo University Ouagadougou Burkina Faso Department of Neurosurgery (Unit) Edward Francis Small Teaching Hospital Banjul Gambia Department of Neurosurgery University Hospital Yalgado Ouedraogo Joseph Ki-Zerbo University Ouagadougou Burkina Faso Department of Neurosurgery Military Hospital Capitaine Halassane Coulibaly Ouagadougou Burkina Faso Department of Orthopedic Surgery University Hospital Souro Sanou Nazi Boni University Bobo Dioulasso Burkina Faso

Objectives: Atlantoaxial dislocation remains a rare and serious condition with a high preoperative and postoperative morbidity and mortality. Its successful surgical management is still challenging and gratifying for neurosurgeons. Several technics have been described such as wiring, trans articular screwing, C1C2 screwing with plate and screw introduced by Goel et al., and modified by insertion of polyaxially screw and rod many years later by Harms. Unavailability and expensiveness of upper cervical spine instrumentation device led us to C1C2 Wiring resulting in a good outcome. Finally, a quadriplegic patient with a more comfortable financial condition had ordered devices from abroad and benefit for Goel and Harms screwing technique and improved dramatically from ASIA A to ASIA E. Material and methods: This is a retrospective study of patients managed in our department by a same neurosurgeon from January 2019 to April 2024. Results: We defined 6 men and 1 woman with an average age of 33 years. Unrestrained driver in a rollover motor vehicle accident was most common. Only one patient was neurologically intact on admission. Neurovegetative disorders were noticed in one patient. Dislocation was associated to a fracture of the dens in two patients. Three patients have been successfully operated with remarkable outcome, mostly from ASIA A to E. Conclusion: C1C2 dislocation is a serious condition and C1C2 Wiring represents an effective and cheaper technic. Therefore, this technic should deserve consideration above all in low incomes countries when screwing devices are not available. Seatbelt should be demanded for motor vehicle drivers and passengers.

关键词： Superior Cervical Spine Dislocation Fracture Wiring Screwing Neurovegetative Disorders

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Machine Learning Techniques for Intrusion Detection Systems in SDN-Recent Advances,Challenges and Future Directions

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Computer Modeling in Engineering & Sciences 2023年第1期134卷 89-119页

作者： Gulshan Kumar hamed Alqahtani Shaheed Bhagat Singh State University Firozpur152024India King Khalid University Abha61421Saudi Arabia

Software-Defined Networking(SDN)enables flexibility in developing security tools that can effectively and efficiently analyze and detect malicious network traffic for detecting *** Machine Learning(ML)techniques have attracted lots of attention from researchers and industry for developing intrusion detection systems(IDSs)considering logically centralized control and global view of the network provided by *** IDSs have developed using advances in machine learning and deep *** study presents a comprehensive review of recent work ofML-based IDS in context to *** presents a comprehensive study of the existing review papers in the *** is followed by introducing intrusion detection,ML techniques and their ***,we present a systematic study of recent works,discuss ongoing research challenges for effective implementation of ML-based intrusion detection in SDN,and promising future works in this field.

关键词： Controller intrusion detection intrusion detection system OpenFlow security software defined networking traffic analysis

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Fuzzy Logic with Archimedes Optimization Based Biomedical Data Classification Model

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Computers, Materials & Continua 2022年第8期72卷 4185-4200页

作者： Mahmoud Ragab Diaa hamed Information Technology Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah 21589Saudi Arabia Centre of Artificial Intelligence for Precision Medicines King Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics Faculty of ScienceAl-Azhar UniversityNaser City 11884CairoEgypt Department of Mineral Resources and Rocks Faculty of Earth SciencesKing Abdulaziz UniversityJeddah 21589Saudi Arabia Geology Department Faculty of ScienceAl-Azhar UniversityNaser City 11884CairoEgypt

Medical data classification becomes a hot research topic in the healthcare sector to aid physicians in the healthcare sector for decision ***,the advances of machine learning(ML)techniques assist to perform the effective classification *** this motivation,this paper presents a Fuzzy Clustering Approach Based on Breadth-first Search Algorithm(FCA-BFS)with optimal support vector machine(OSVM)model,named FCABFS-OSVM for medical data *** proposed FCABFS-OSVM technique intends to classify the healthcare data by the use of clustering and classification ***,the proposed FCABFSOSVM technique involves the design of FCABFS technique to cluster the medical data which helps to boost the classification ***,the OSVM model investigates the clustered medical data to perform classification ***,Archimedes optimization algorithm(AOA)is utilized to the SVM parameters and boost the medical data classification results.A wide range of simulations takes place to highlight the promising performance of the FCABFS-OSVM *** comparison studies reported the enhanced outcomes of the FCABFS-OSVM technique over the recent state of art approaches.

关键词： Clustering medical data classification machine learning parameter tuning support vector machines

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Deep Learning-Based Cancer Detection-Recent Developments,Trend and Challenges

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Computer Modeling in Engineering & Sciences 2022年第3期130卷 1271-1307页

作者： Gulshan Kumar hamed Alqahtani Shaheed Bhagat Singh State University FerozepurIndia King Khalid University AbhaSaudi Arabia

Cancer is one of the most critical diseases that has caused several deaths in today’s *** most cases,doctors and practitioners are only able to diagnose cancer in its later *** the later stages,planning cancer treatment and increasing the patient’s survival rate becomes a very challenging ***,it becomes the need of the hour to detect cancer in the early stages for appropriate treatment and surgery *** and interpretation of medical images such as MRI and CT scans help doctors and practitioners diagnose many diseases,including cancer ***,manual interpretation of medical images is costly,time-consuming and ***,deep learning,a subset of artificial intelligence,is gaining increasing attention from practitioners in automatically analysing and interpreting medical images without their *** learning methods have reported extraordinary results in different fields due to their ability to automatically extract intrinsic features from images without any dependence on manually extracted *** study provides a comprehensive review of deep learning methods in cancer detection and diagnosis,mainly focusing on breast cancer,brain cancer,skin cancer,and prostate *** study describes various deep learningmodels and steps for applying deep learningmodels in detecting *** developments in cancer detection based on deep learning methods have been critically analysed and summarised to identify critical challenges in applying them for detecting cancer accurately in the early *** on the identified challenges,we provide a few promising future research directions for fellow researchers in the *** outcome of this study provides many clues for developing practical and accurate cancer detection systems for its early diagnosis and treatment planning.

关键词： Autoencoders(AEs) cancer detection convolutional neural networks(CNNs) deep learning generative adversarial models(GANs) machine learning

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Slope stability of an unsaturated embankment with and without natural pore water salinity subjected to rainfall infiltration

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岩土力学 2022年第8期43卷 2136-2148页

作者： SADEGHI hamed KOLAHDOOZ Ali AHMADI Mohammad-Mehdi Department of Civil Engineering Sharif University of TechnologyTehran ***Iran

Natural soils contain a certain amount of salt in the form of dissolved ions or electrically charged atoms,originated from the long-term erosion by acidic *** dissolved salt poses an extra osmotic water potential being normally neglected in laboratory measurements and numerical ***,ignorance of salinity may result in overestimation of stability,and the design may not be as conservative as ***,this research aims to first experimentally examine the influence of pore water salinity on water retention curve and saturated permeability of natural dispersive loess under saline and desalinated ***,the measured parameters are used for stability analyses of a railway embankment in an area subjected to regional rainfall ***,a numerical parametric study is carried out to explore the significance of different rainfall schemes,construction patterns,and anisotropic permeability on the factor of *** reveal that desalinization suppresses the water retention capability,which in turn results in a tremendous declination of unsaturated hydraulic *** the natural saline embankment,rainfall can hardly infiltrate into the desalinated embankment due to the lower ***,the factor of safety for natural saline conditions drops notably,while only marginal changes occur in the case of the desalinated embankment.

关键词： slope stability water salinity osmotic potential dispersive loess rainfall patterns

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On braced trapezoidal corrugated steel shear panels: An experimental and numerical study

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Frontiers of Structural and Civil Engineering 2023年第3期17卷 396-410页

作者： Vahid AMIRI Arash AKBARI hamed Karim ABEDI Faculty of Civil Engineering Sahand University of TechnologyTabriz ***Iran

In this study,a new system consisting of a combination of braces and steel infill panels called the braced corrugated steel shear panel(BCSSP)is *** obtain the hysteretic behavior of the proposed system,the quasistatic cyclic performances of two experimental specimens were first *** finite element modeling method was then verified based on the obtained experimental *** numerical evaluations were carried out to investigate the effects of different parameters on the ***,a relationship was established to estimate the buckling shear strength of the system without considering residual *** results obtained from the parametric study indicate that the corrugated steel shear panel(CSSP)with the specifications of a=30 mm,t=2 mm,andθ=90°had the highest energy dissipation capacity and ultimate strength while the CSSP with the specifications of a=30 mm,t=2 mm,andθ=30°had the highest initial *** can thus be concluded that the latter CSSP has the best structural performance and that increasing the number of corrugations,corrugation angle,and plate thickness and decreasing the sub-panel width generally enhance the performance of CSSPs in terms of the stability of their hysteretic behaviors.

关键词： trapezoidal corrugated plate steel shear panel braced steel shear panel experimental study buckling resistance

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Morphological peculiarities of the lithium electrode from the perspective of the Marcus-Hush-Chidsey model

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Journal of Energy Chemistry 2023年第5期80卷 452-457,I0011页

作者： Behnam Ghalami Choobar Hamid hamed Mohammadhosein Safari Institute for Materials Research(IMO-imomec) UHasseltMartelarenlaan 42B-3500 HasseltBelgium Energyville Thor Park 8320B-3600 GenkBelgium IMEC Division IMOMEC BE-3590Belgium

This study employs the kinetics framework of Marcus-Hush-Chidsey(MHC)to investigate the charge transfer at the interface of lithium electrode and electrolyte in lithium(ion)-*** chargetransfer rate constant is evaluated for different facets of lithium,namely(100),(110),(101),and(111)as a function of surface charge density with the aid of density functional theory(DFT)*** results highlight and quantify the sensitivity of the rate of lithium plating and stripping to the surface orientation,surface charge density,and charge-transfer *** intrinsic kinetics competition among the different surface orientations is identified together with an asymmetry between the lithium plating and stripping and showcased to influence the deposit morphology and surface protrusions and indentations.

关键词： Marcus-Hush-Chidsey kinetics Surface orientation Surface charge Lithium electrode

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Effects of Zr additions on structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti(wt.%) alloy

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China Foundry 2022年第1期19卷 9-16页

作者： hamed Kamali Erfan Kamali Massoud Emamy School of Metallurgy and Materials Engineering College of EngineeringUniversity of TehranP.O.Box 11155-4563TehranIran Faculty of Materials Engineering Sahand University of TechnologyP.O.Box 51335-1996TabrizIran

The effects of different Zr additions(0.05wt.%-0.5wt.%)on the structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti(wt.%)alloy solidified under a high cooling rate(18℃·s^(-1)),in as-cast and T6 heat-treated conditions were *** as-cast structure of the alloy consists of equiaxed grains ofα-Al with an average size of 64μm which is unaffected by the Zr additions,indicating the ineffectiveness of Zr in the grain refinement of the *** electron microscopy,along with X-ray diffraction analysis revealed the presence of elongatedθ-Al2Cu at the grain boundaries;in addition,coarse Al3Zr particles exist in the intergranular regions of the 0.5wt.%Zr-containing *** the T6 heat treatment,the elongatedθparticles were fragmented;however,the coarse Al3Zr particles remained unchanged in the ***,the formation of fineβ’-Al3Zr andθ’’-Al3Cu/θ’-Al2Cu phases during T6 heat treatment was revealed by transmission electron *** results of the tensile tests showed that the Zr additions increase the strength of the alloy in both as-cast and T6 heat-treated conditions,but reduce its elongation,especially with 0.5wt.%Zr *** 0.3wt.%Zr-added alloy in the T6 heat-treated condition has the highest quality index value(249 MPa).Fractography of the fracture surfaces of the alloys revealed ductile fracture mode including dimples and cracked intermetallic phases in both conditions.

关键词： Al-Cu-Mg alloys casting T6 heat treatment structure precipitation hardening tensile properties fractography

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Synthesis of Lignin-Based Polyacid in an Acidic Ionic Liquid: A Green Method to Improve the Performance of Lignin as Catalyst in Urea-Formaldehyde Resin

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Journal of Renewable Materials 2022年第2期10卷 237-246页

作者： hamed Younesi-Kordkheili Antonio Pizzi Department of Wood and Paper Sciences Faculty of Natural ResourcesSemnan UniversitySemnanIran LERMAB University of LorraineEpinalFrance

The aim of this research was to investigate the effect of ionic liquid treated lignin-based polyacid as a catalyst for urea-formaldehyde(UF)*** of lignin was carried out,without any catalyst,with anhydride maleic and 1-butyl-3-methylimidazolium hydrogen sulfate[Bmim][HSO 4]as acidic ionic liquid to form maleated lignin-based polyacids(MA-IL).The performance of MA-IL as UF resin catalyst was respectively compared to hyroxymethylated lignin-based polyacid(MA-HL)and to NH 4 *** FTIR analysis indicated that the propor-tion of-COOH and C-O bonds increased due to the esterification of lignin with ionic liquid rather than its *** tests indicated that the gelation time of the UF resin was shorter by adding MA-IL when compared to NH 4 Cl and MA-HL,*** analysis showed that the addition of MA-IL significantly decreased the temperature peak(Tp)of the UF resin;as the Tp of the UF resin with 2 wt%MA-IL was lower than with MA-HL and NH 4 Cl,*** panel test results of plywood bonded with a UF resin with a MA-IL level increasing from 1%to 3%,effectively improved the mechanical strength,water resistance and formaldehyde emission even higher than with MA-HL and NH 4 Cl,respectively.

关键词： Lignin-based polyacid maleic anhydride ionic liquid esterification plywood

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Semi entropy of uncertain random variables and its application to portfolio selection

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Applied Mathematics(A Journal of Chinese Universities) 2022年第3期37卷 383-395页

作者： GAO Jin-wu hamed Ahmadzade Mehran Farahikia School of Economics Ocean University of ChinaQingdao 266100China Department of Mathematical Sciences University of Sistan and BaluchestanZahedanIran Department of Statistics Payame Noor University19395-4697 TehranIran Ayandeh bank No.1Ahmad Ghasir(Bokharest)StArgentina SqTehranIran

Semi entropy is a measure to characterize the indeterminacy of the uncertain random variable considering the values of the uncertain random variable which are lower than the *** important roles of semi entropy in finance,this paper presents the concept of semi entropy for uncertain random *** order to compute semi entropy for uncertain random variables,Monte-Carlo approach is *** an application of semi entropy,portfolio selection problems are optimized based on mean-semi entropy mode.

关键词： chance theory uncertain random variable semi entropy portfolio selection Monte-Carlo simulation

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