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Mobile Fog Computing by Using sDN/NFV on 5G Edge Nodes

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Computer systems science & Engineering 2022年第5期41卷 751-765页

作者： G.R.sreekanth s.ahmed Najat ahmed Marko sarac Ivana strumberger Nebojsa Bacanin Miodrag Zivkovic Department of Computer science and Engineering Kongu Engineering CollegeErode638060India Department of Computer Engineering Lebanese French UniversityErbil44001Iraq singidunum University Belgrade11000Serbia

Abstract:Fog computing provides quality of service for cloud *** the data computation intensifies,edge computing becomes ***,mobile fog computing is used for reducing traffic and the time for data computation in the *** previous studies,software-defined networking(sDN)and network functions virtualization(NFV)were used separately in edge *** industrial and academic research is tackling to integrate sDN and NFV in different environments to address the challenges in performance,reliability,and ***/NFV is still in *** traditional Internet of things(IoT)data analysis system is only based on a linear and time-variant system that needs an IoT data system with a high-precision *** paper proposes a combined architecture of sDN and NFV on an edge node server for IoT devices to reduce the computational complexity in cloud-based fog *** provides a generalization structure of the forwarding plane,which is separated from the control ***,NFV concentrates on virtualization by combining the forwarding model with virtual network functions(VNFs)as a single or chain of VNFs,which leads to interoperability and *** orchestrator layer in the proposed software-defined NFV is responsible for handling real-time tasks by using an edge node server through the sDN controller via four actions:task creation,modification,operation,and *** proposed architecture is simulated on the EstiNet simulator,and total time delay,reliability,and satisfaction are used as evaluation *** simulation results are compared with the results of existing architectures,such as software-defined unified virtual monitoring function and AsTP,to analyze the performance of the proposed *** analysis results indicate that our proposed architecture achieves better performance in terms of total time delay(1800 s for 200 IoT devices),reliability(90%),and satisfaction(90%).

关键词： Mobile fog computing edge computing edge node IoT softwaredefined networking network functions virtualization orchestrator

Combined heat and mass transfer by mixed convection MHD flow along a porous plate with chemical reaction in presence of heat source

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Applied Mathematics and Mechanics(English Edition) 2010年第10期31卷 1217-1230页

作者： J.ZUECO s.ahmed ETs Ingeniería Industrial Departamento de Ingeniería Térmicay FluidosUniversidad Politécnica de Cartagena Fluid Dynamics Research Department of MathematicsGoalpara College

An exact and a numerical solutions to the problem of a steady mixed convective MHD flow of an incompressible viscous electrically conducting fluid past an infinite vertical porous plate with combined heat and mass transfer are presented.A uniform magnetic field is assumed to be applied transversely to the direction of the flow with the consideration of the induced magnetic field with viscous and magnetic dissipations of *** porous plate is subjected to a constant suction velocity as well as a uniform mixed stream *** governing equations are solved by the perturbation technique and a numerical *** analytical expressions for the velocity field,the temperature field,the induced magnetic field,the skin-friction,and the rate of heat transfer at the plate are *** numerical results are demonstrated graphically for various values of the parameters involved in the *** effects of the Hartmann number,the chemical reaction parameter,the magnetic Prandtl number,and the other parameters involved in the velocity field,the temperature field,the concentration field,and the induced magnetic field from the plate to the fluid are *** increase in the heat source/sink or the Eckert number is found to strongly enhance the fluid velocity *** induced magnetic field along the x-direction increases with the increase in the Hartmann number,the magnetic Prandtl number,the heat source/sink,and the viscous *** is found that the flow velocity,the fluid temperature,and the induced magnetic field decrease with the increase in the destructive chemical *** of the study arise in the thermal plasma reactor modelling,the electromagnetic induction,the magnetohydrodynamic transport phenomena in chromatographic systems,and the magnetic field control of materials processing.

关键词： MHD perturbation technique network simulation method Eckert number mixed convection induced magnetic field viscous dissipation heat source/sink

Formation of Co-implanted silicon Ultra-shallow Junctions for Low Thermal Budget Applications

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Chinese Physics Letters 2013年第1期30卷 127-129页

作者： Rehana Mustafa s.ahmed E.U.Khan Department of Physics International Islamic UniversityIslamabadPakistan Advanced Electronics Laboratory Faculty of Engineering&TechnologyInternational Islamic University IslamabadPakistan Center for Emerging sciences Engineering and TechnologyIslamabadPakistan Department of Physics Gomal UniversityD.I.KhanPakistan

We present a systematic study to create ultra-shallow junctions in n-type silicon substrates and investigate both pre-and post-annealing processes to create a processing strategy for potential applications in *** wafers were co-implanted with indium and C atoms at energies of 70 keV and 10 keV,respectively.A carefully chosen implantation schedule provides an abrupt ultra-shallow junction between 17 and 43 nm with suppressed sheet resistance and appropriate retained sheet carrier concentration at low thermal budget.A defect doping matrix,primarily the behavior and movement of co-implant generated interstitials at different annealing temperatures,may be engineered to form sufficiently activated ultra-shallow devices.

关键词： shallow annealing implantation

Preparation and Characterization of Boron Thin Film on Iron substrate

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Journal of Materials science & Technology 2007年第4期23卷 481-486页

作者： Ishrat REHANA D.Muhammad s.ahmed J.I.Akhter Central Analytical Facility Division Pakistan Institute of Nuclear science and Technology NiloreIslamabadPakistan Physics Radiation Division Pakistan Institute of Nuclear science and Technology NiloreIslamabadPakistan

The adherent thermal layering was undertaken by chemical vapor deposition （CVD） method using saturated solution of boric acid in ultra pure CH3OH. The influence of temperature was studied by varying temperature from 100 to 600℃ during the process of boron deposition. The most optimum temperature was found to be 200℃. The effect of time span was observed from 6 to 120 h. The generation of micro or nano-scale thickness could be achieved by reducing time span of the experiment. The behavior of CVD was characterized by using scanning electron microscope, absorbance spectrohotometer and atomic emission spectrograph.

关键词： Boron Chemical vapor deposition (CVD) scanning electron microscopy (sEM) Atomic emission spectrograph (AEs) Absorbance spectrophotometer Thin film

Automatic Channel Detection Using DNN on 2D seismic Data

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Computer systems science & Engineering 2021年第1期36卷 57-67页

作者： Fahd A.Alhaidari saleh A.Al-Dossary Ilyas A.salih Abdlrhman M.salem ahmed s.Bokir Mahmoud O.Fares Mohammed I.ahmed Mohammed s.ahmed Imam Abdulrahman Bin Faisal University College of Computer Science and Information TechnologyDammam34212Saudi Arabia saudi Aramco Oil Company EXPEC-IIDhahranSaudi Arabia

Geologists interpret seismic data to understand subsurface properties and subsequently to locate underground hydrocarbon *** are among the most important geological features interpreters analyze to locate petroleum ***,manual channel picking is both time consuming and ***,similar to any other process dependent on human intervention,manual channel picking is error prone and *** address these issues,automatic channel detection is both necessary and important for efficient and accurate seismic *** systems make use of real-time image processing techniques for different *** channel detection is a combination of different mathematical methods in digital image processing that can identify streaks within the images called channels that are important to the oil *** this paper,we propose an innovative automatic channel detection algorithm based on machine learning *** new algorithm can identify channels in seismic data/images fully automatically and tremendously increases the efficiency and accuracy of the interpretation *** algorithm uses deep neural network to train the classifier with both the channel and non-channel *** provide a field data example to demonstrate the performance of the new *** training phase gave a maximum accuracy of 84.6%for the classifier and it performed even better in the testing phase,giving a maximum accuracy of 90%.

关键词： Deep neural networks deep learning channel detection image processing two-dimensional seismic data

Egyptian heavy vacuum gas oil hydrotreating over Co-Mo/CNT and Co-Mo/γ-Al2O3 catalysts

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燃料化学学报 2016年第7期44卷 853-861页

作者： W.ahmed Hoda,s.ahmed H.s.El-sheshtawy Nadia,A.Mohamed Asmaa,I.Zahran Egyptian Petroleum Research Institute 1Aahmed El-Zomor st.Naser city 11727CairoEgypt Ain-shams University for Girls Roqqsy SquireCairoEgypt

The catalytic activity of CoMos /CNT towards the Egyptian heavy vacuum gas oil hydrotreating was studied. The delivered CNT was functionalized with 6 mol /L HNO_3. The CNT were loaded with 12% MoO_3( by weight) and 0.7 Co /Mo atomic ratio with impregnation methods. The γ-Al_2O_3 catalyst was also prepared by impregnation method to compare both catalysts *** analysis tools such XRD,Raman spectroscopy,TEM,and BET were used to characterize the catalysts. The autoclave reactor was used to operate the hydrotreating experiments. The hydrotreating reactions were tested at various operating conditions of temperature 325-375 ℃,pressure 2-6 MPa,time 2-6 h,and catalyst /oil ratio( by weight) of 1 ∶75,1 ∶33 and 1 ∶10. The results revealed that the CoMos /CNT was highly efficient for the hydrotreating more than the CoMos /γ-Al_2O_3. Also, the hydrodesulfurization( HDs) increased with increasing catalyst /oil ratio. Additionally,results showed that the optimum condition was temperature 350℃,pressure 4 MPa,catalyst /oil ratio of 1 ∶75 for 2 h. Furthermore,even at low CoMos /CNT catalyst /oil ratio of 1 ∶75,an acceptable HDs of 77.1% was achieved.

关键词： hydrotreatment hydrodesulfurization carbon nanotube heavy vacuum gas oil(HVGO)

The impact on alpha emission rates of varying distances between a CR-39 detector and alpha-emitting bone samples

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Radiation Detection Technology and Methods 2021年第4期5卷 618-626页

作者： Nada Farhan Kadhim Yasser Ayad Kadhim Rasha s.ahmed Ali A.Ridha Mostafa Y.A.Mostafa Department of Physics College of ScienceMustansiriyah UniversityBaghdadIraq Department of Physiology College of MedicineAl-Nahrain UniversityP.O.Box 70010AlkadhimiyaBaghdadIraq Physics Unit Science DepartmentRustaq College of EducationUniversity of Technology and Applied SciencesMuscatSultanate of Oman Physics Department Faculty of ScienceMinia UniversityEl-Minia 61519Egypt Ural Federal University Mira Street 19YekaterinburgRussia620002

Background Changing the distance between a sample and an exposed solid-state nuclear track detector affects the number of alpha tracks recorded by the *** concept had been used to distinguish high-energy alpha particles by computing the alpha emission rate at two distances(0 and 2 cm)from animal bone *** and methods Two Cr-39 detectors were placed in a container with bone ash inside to measure the alpha emission rate when the detectors were in contact with the ash and hung at a distance of 2 cm from the *** The alpha emission rate was found to be 62.7×10^(−4) Bq cm^(−2) when the detector was in contact with the sample(a small exposure area)and 324.4×10^(−4) Bq cm^(−2) when the sample was placed 2 cm away(a larger exposure area).A mathematical equalization of the exposure areas was conducted(the area of the detector exposed to the alpha emitter sample at a distance of 2 cm was equalized to the area exposed when in contact with the sample).After equalization,a reduction in the average value of the alpha emission rate from 324.4×10^(−4) to 17.4×10^(−4) Bq cm^(−2) was *** The increase in distance between the sample and the detector allowed only high-energy alpha particles with a range greater than the traveled distance to reach the ***,this system can distinguish the type and number of nuclides in the sample by changing the distance between the detector and the sample according to each nucleus ***,the results show that the alpha emission rates in these bone samples are higher than the local values.

关键词： Radioactivity Animal bone CR-39 detector Track density Alpha range

Neurocysticercosis:A case report and brief review

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Asian Pacific Journal of Tropical Medicine 2016年第1期9卷 98-100页

作者： syed A.A.Rizvi Ayman M.saleh Hanns Frimpong Hussain M.Al Mohiy Jasmin ahmed Ronda D.Edwards sultan s.ahmed College of Pharmacy Nora Southeastern University JAs Medical Management LLC Department of Basic Medical sciences College of MedicineKing Saud Bin Abdulaziz University for Health SciencesNational Guard Health Affairs Radiological sciences Department College of Applied Medical SciencesKing Khalid University Herbert Wertheim College of Medicine Florida International University school of Medicine Spartan Health Science University

Neurocysticercosis(NCC) is one of the seven neglected endemic zoonoses targeted by the World Health *** is considered a common infection of the nervous system caused by the Tanenia solium and is known to be the primary cause of preventable epilepsy in many developing *** is commonly resulted by the ingestion of Tanenia solium eggs after consuming undercooked pork,or contaminated *** parasite can grow in the brain and spinal cord within the nervous system,causing severe headache and seizures beside other pathological *** and international travel to endemic countries has made this disease common in the United *** can be diagnosed with computed tomography and magnetic resonance imaging of the *** treatment of the NCC including cysticidal drugs(eg.,albendazole and praziquantel),and neurosurgical procedure,depending upon a the situation.A patient of Asian origin came to our clinic with complaints of dizziness,headaches and episodes seizures for the past twelve years without proper *** computed tomography and magnetic resonance imaging scans indicated multilobulated cystic mass in the brain with the suspicion of neurocysticercosis.

关键词： Neurocysticercosis Tanenia solium Epilepsy Magnetic resonance imaging Computed Tomography

Benign lymph node microenvironment is associated with response to immunotherapy

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Precision Clinical Medicine 2020年第1期3卷 44-53页

作者： Maria I.Toki Deepika Kumar Fahad s.ahmed David L.Rimm Mina L.Xu Department of Pathology Yale University School of MedicineNew HavenCT 06510USA Department of Medicine Yale University School of MedicineNew HavenCT 06510USA

Introduction:Benign lymph nodes have been considered the hubs of immune surveillance in cancer *** microenvironment of these lymphoid tissues can be immune suppressed,hence allowing for tumor *** the spectrum of benign findings in bystander lymph nodes in immune checkpoint blockade therapy could prove to be key to understanding the mechanism and assessing treatment ***:Benign lymph nodes and spleen were evaluated from patients treated with immunotherapy who subsequently received postmortem *** used quantitative immunofluorescence(QIF)to assess tumor infiltrating lymphocytes(TIL)and macrophage marker expression and characterized activation status using a novelmultiplexed QIF assay including CD3,GranzymeB,and *** performedimmunohistochemistry to correlate results of ***:Benign lymph nodes from non-responders to immunotherapy showed significantly higher expression of cytotoxic markers and proliferation index(Ki67)in T cells compared to *** expression of PD-L1 in macrophages was also *** was no significant difference in CD3+expression,but higher levels of CD8+T cells as well as CD20+B cells were seen in lymph nodes of *** significant differences were seen between responder and non-responder splenic *** were supported by traditional immunostaining ***:While most studies in biomarkers for immunotherapy focus on tumor microenvironment,we show that benign lymph node microenvironment may predict response to *** responding patients,bystander lymph nodes appear to have been mobilized,resulting in reduced cytotoxic T ***,patients whose disease progressed on immunotherapy demonstrate higher levels of macrophages that express increased PD-L1,and activated T cells not recruited to the tumor site.

关键词： response to immunotherapy lymph node microenvironment quantitative immunofluorescence