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Transient Dean flow in a composite annular duct with porous walls partially filled with porous material

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Propulsion and Power Research 2022年第1期11卷 118-128页

作者： Basant K.Jha Taiwo s.Yusuf Department of Mathematics Ahmadu Bello UniversityZariaNigeria

This work presents a semi-analytical solution of transient Dean flow in a composite annular duct with porous walls partially filled with porous *** flow is set up as a result of the imposed pressure gradient in the azimuthal eqT direction while both the outer and the inner cylinders are *** appropriate governing equations for the flow are rendered dimensionless and transformed using suitable techniques,the Laplace transform technique is further used to transform the partial differential equations into the total differential *** solution of the ODE is later transformed to the time domain using the well-known Riemann-sum approximation *** validate the accuracy of the numerical scheme deployed in this research,numerical comparison of the steady-state solution,and the values generated using the implicit finite difference on the transient state model is ***,higher dominance of clear fluid and fluid injection at the inner cylinder is found to enhance the fluid velocity at the fluid *** is also good to note that injection of fluid at the inner cylinder pose a decreasing influence on the flow with minimum or no effect near the point R=1.7.

关键词： Circumferential flow Darcy number Composite annulus Taylor Porous walls Azumuthal

The kinematical and space structures of IC 2391 open cluster and moving group with Gaia-DR2

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Research in Astronomy and Astrophysics 2020年第2期20卷 21-30页

作者： E.s.Postnikova W.H.Elsanhoury Devesh P.sariya N.V.Chupina s.V.Vereshchagin Ing-Guey Jiang Institute of Astronomy of Russian Academy of sciences(INAsAN) 48 Pyatnitskaya st.MoscowRussia Astronomy Department National Research Institute of Astronomy and Geophysics(NRIAG)11421HelwanCairoEgypt(Affiliation ID:60030681) Physics Department Faculty of Science and ArtsNorthern Border UniversityTuraif BranchSaudi Arabia Department of Physics and Institute of Astronomy “National Tsing Hua University”Hsinchu 30013

The kinematical parameters,spatial shape and structure of the open cluster IC 2391 and the associated stellar stream are studied here using Gaia Data Release 2(GDR2) astrometry *** apex positions are determined for the open cluster IC 2391(data taken from Cantat-Gaudin et al.) and for the kinematical stream’s stars mentioned in Montes et *** both convergent point and AD-diagram *** values of apex coordinates are:(A,D)CP=(6.~h17 ± 0.~h004,-6.°88 ± 0.°381;for cluster) and(6.~h07 ± 0.~h007,-5.°00 ± 0.°447;stream),and(A0,D0) =(6.~h12 ± 0.~h004,-3.°4 ± 0.°3;cluster) and(6.~h21 ±0.~h007,-11.°895 ± 0.°290;stream).The results are in good agreement with the previously calculated *** positions of the stars in the disk and the spatial dispersion velocities are *** paths of cluster and associated stream are traced in the disk by orbit calculation back in time to their places of formation.A possible genetic relationship between the cluster and stream has been *** approximation of the spatial and kinematical shape of the stream and the cluster is *** to this study,even though currently the cluster and stream seem to have a spatial difference in their locations,they appear to have formed in the same region of the Galactic disk.

关键词： stars:kinematics and dynamics Galaxy:stellar content (Galaxy:)open clusters and associations:individual:IC 2391

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A Cyber-Attack Detection system Using Late Fusion Aggregation Enabled Cyber-Net

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Intelligent Automation & soft Computing 2023年第6期36卷 3101-3119页

作者： P.shanmuga Prabha s.Magesh Kumar Department of Computer science and Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical Sciences(Deemed to be University)ChennaiTamilnaduIndia

Today,securing devices connected to the internet is challenging as security threats are generated through various *** protection of cyber-physical systems from external attacks is a primary *** presented method is planned on the prime motive of detecting cybersecurity attacks and their impacted *** proposed architecture employs the LYsIs dataset and formulates Multi Variant Exploratory Data Analysis(MEDA)through Principle Component Analysis(PCA)and singular Value Decompo-sition(sVD)for the extraction of unique *** feature mappings are analyzed with Recurrent 2 Convolutional Neural Network(R2CNN)and Gradient Boost Regression(GBR)to identify the maximum *** Late Fusion Aggregation enabled with Cyber-Net(LFAEC)is the robust derived *** quantitative analysis uses predicted threat points with actual threat variables from which mean and difference vectors *** performance of the presented system is assessed against the parameters such as Accuracy,Precision,Recall,and F1 *** proposed method outperformed by 98% to 100% in all quality measures compared to existing methods.

关键词： External attacks cyber-physical systems principle component analysis singular value decomposition recurrent 2 convolutional neural network gradient boost regression

Recent advances in biomaterials for 3D scaffolds: A review

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Bioactive Materials 2019年第1期4卷 271-292页

作者： Maria P.Nikolova Murthy s.Chavali Department of Material science and Technology University of Ruse“A.Kanchev”8 Studentska Str.7000RuseBulgaria shree Velagapudi Ramakrishna Memorial College(PG studies Autonomous)Nagaram522268Guntur DistrictIndia PG Department of Chemistry Dharma Appa Rao CollegeNuzvid521201Krishna DistrictIndia MCETRC Tenali522201Guntur DistrictAndhra PradeshIndia

Considering the advantages and disadvantages of biomaterials used for the production of 3D scaffolds for tissue engineering,new strategies for designing advanced functional biomimetic structures have been *** offer a comprehensive summary of recent trends in development of single-(metal,ceramics and polymers),composite-type and cell-laden scaffolds that in addition to mechanical support,promote simultaneous tissue growth,and deliver different molecules(growth factors,cytokines,bioactive ions,genes,drugs,antibiotics,etc.)or cells with therapeutic or facilitating regeneration *** paper briefly focuses on divers 3D bioprinting constructs and the challenges they *** on their application in hard and soft tissue engineering,in vitro and in vivo effects triggered by the structural and biological functionalized biomaterials are *** authors discuss the future outlook for the development of bioactive scaffolds that could pave the way for their successful imposing in clinical therapy.

关键词： Bioactive scaffolds Bone tissue engineering Polymeric biomaterials Bioceramics Bioprinting

Large-scale Electromagnetic Modeling for Multiple Inhomogeneous Domains

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Communications in Computational Physics 2009年第7期6卷 269-289页

作者： Masashi Endo Martin Cuma Michael s.Zhdanov Department of Geology and Geophysics University of Utah135S 1460ERm 719Salt Lake CityUT 84112USA

We develop a new formulation of the integral equation(IE)method for three-dimensional(3D)electromagnetic(EM)field computation in large-scale models with multiple inhomogeneous *** problem arises in many practical applications including modeling the EM fields within the complex geoelectrical structures in geophysical *** geophysical applications,it is difficult to describe an earth structure using the horizontally layered background conductivity model,which is required for the efficient implementation of the conventional IE *** a result,a large domain of interest with anomalous conductivity distribution needs to be discretized,which complicates the *** new method allows us to consider multiple inhomogeneous domains,where the conductivity distribution is different from that of the background,and to use independent discretizations for different *** reduces dramatically the computational resources required for largescale *** addition,using this method,we can analyze the response of each domain separately without an inappropriate use of the superposition principle for the EM field *** method was carefully tested for the modeling the marine controlled-source electromagnetic(MCsEM)fields for complex geoelectric structures with multiple inhomogeneous domains,such as a seafloor with the rough bathymetry,salt domes,and *** have also used this technique to investigate the return induction effects from regional geoelectrical structures,e.g.,seafloor bathymetry and salt domes,which can distort the EM response from the geophysical exploration target.

关键词： Large-scale EM modeling multiple inhomogeneous domains marine CsEM

Migration of bone marrow progenitor cells in the adult brain of rats and rabbits

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World Journal of stem Cells 2016年第4期8卷 136-157页

作者： Donnahue Dennie Jean-Pierre Louboutin David s strayer section of Anatomy Department of Basic Medical SciencesUniversity of the West IndiesMona Campus Department of Cell Biology Anatomy and PathologyThomas Jefferson University

Neurogenesis takes place in the adult mammalian brain in three areas:subgranular zone of the dentate gyrus(DG);subventricular zone of the lateral ventricle;olfactory *** molecular markers can be used to characterizethe cells involved in adult *** has been recently suggested that a population of bone marrow(BM)progenitor cells may migrate to the brain and differentiate into neuronal *** explore this hypothesis,we injected recombinant sV40-derived vectors into the BM and followed the potential migration of the transduced ***-term BM-directed gene transfer using recombinant sV40-derived vectors leads to expression of the genes delivered to the BM firstly in circulating cells,then after several months in mature neurons and microglial cells,and thus without central nervous system(CNs)*** of transgene-expressing cells expressed NeuN,a marker of mature ***,BM-derived cells may function as progenitors of CNs cells in adult *** mechanism by which the cells from the BM come to be neurons remains to be *** the observed gradual increase in transgene-expressing neurons over 16mo suggests that the pathway involved differentiation of BM-resident cells into neurons,cell fusion as the principal route cannot be totally ruled *** studies using similar viral vectors showed that BM-derived progenitor cells migrating in the CNs express markers of neuronal precursors or immature ***-positive cells were found in the subgranular zone of the DG of the hippocampus 16 mo after intramarrow injection of the *** addition to cells expressing markers of mature neurons,transgene-positive cells were also positive for nestin and doublecortin,molecules expressed by developing neuronal *** cells were actively proliferating,as shown by short term BrdU incorporation *** seizures by using kainic acid increased the number of BM progenitor cells transduced by sV40vectors migrating

关键词： stem cells Bone marrow Hippocampus Cell therapy sV40 Brain Nestin Doublecortin Neurons Development Epilepsy seizures

Variation of turbidity during subsurface abstraction of river water: A case study

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International Journal of sediment Research 2010年第4期25卷 355-365页

作者： A.K.THAKUR C.s.P.OJHA Department of science and Technology Patna India Department of Civil Engineering IIT Roorkee Uttarakhand 247667 India

Rivers are known to carry sediment loads. Many rivers in Asia including Kosi, Brahmaputra, Bagmati rivers in India and Yellow and Yarlung Tsangpo rivers in China are well known for their carriage of excessive sediment loads. In India, many water abstraction units are located along river banks. Their success depends on how the sediment load is trapped as the sediment laden water flows towards the pumping wells located few hundred meters away from river bank. In this work, based on the analysis of a data of one year on suspended load variations in a canal, located at Haridwar, India, trap efficiency variations are studied during the passage of source water to the abstraction well. Considering the subsurface basin, located within the source water and the abstraction well, as a hypothetical settling basin, variation of trap efficiency is related with the influent concentration. It is observed that the trap efficiency depends on the influent concentration. Appropriate functional forms for the variation of trap efficiency with the influent concentrations are also identified.

关键词： Turbidity River bank filtration suspended sediment Bank filtrate Clogging Influent concentration and effluent concentration Trap efficiency

Feature selection with Deep Reinforcement Learning for Intrusion Detection system

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Computer systems science & Engineering 2023年第9期46卷 3339-3353页

作者： s.Priya K.Pradeep Mohan Kumar Department of Computer science and Engineering SRM Institute of Science and TechnologyRamapuramChennai600089India Department of Computing Technologies SRM Institute of Science and TechnologyKattankulathurChennai603203India

An intrusion detection system(IDs)becomes an important tool for ensuring security in the *** recent times,machine learning(ML)and deep learning(DL)models can be applied for the identification of intrusions over the network *** resolve the security issues,this paper presents a new Binary Butterfly Optimization algorithm based on Feature selection with DRL technique,called BBOFs-DRL for intrusion *** proposed BBOFsDRL model mainly accomplishes the recognition of intrusions in the *** attain this,the BBOFs-DRL model initially designs the BBOFs algorithm based on the traditional butterfly optimization algorithm(BOA)to elect feature ***,DRL model is employed for the proper identification and classification of intrusions that exist in the ***,beetle antenna search(BAs)technique is applied to tune the DRL parameters for enhanced intrusion detection *** ensuring the superior intrusion detection outcomes of the BBOFs-DRL model,a wide-ranging experimental analysis is performed against benchmark *** simulation results reported the supremacy of the BBOFs-DRL model over its recent state of art approaches.

关键词： Intrusion detection security reinforcement learning machine learning feature selection beetle antenna search

Physiological traits contributed to the recent increase in yield potential of winter wheat from Henan Province, China

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Journal of Integrative Plant Biology 2014年第5期56卷 492-504页

作者： Bangwei Zhou álvaro sanz-sáez Abdelhalim Elazab Tianmin shen Rut sánchez-Bragado Jordi Bort Maria Dolors serret José Luis Araus Unit of Plant Physiology Faculty of Biology University of Barcelona Henan Tianmin seed Company Lankao County Department of Plant Biology University of Illinois Urbana-Champaign

This experiment aims to test the traits responsible for the increase in yield potential of winter wheat released in Henan Province, China. seven established cultivars released in the last 20 years and three advanced lines were assayed. The results showed that grain yield was positively correlated with harvest index（HI）, kernel number per square meter, and aboveground biomass. In addition, the HI and aboveground biomass showed an increasing trend with the year of ***, we can conclude that bread wheat breeding advances during recent decades in Henan Province, China,have been achieved through an increase in HI, kernel number per square meter, and aboveground biomass. A higher d13C seems also to be involved in these advances, which suggests a progressive improvement in constitutive water use efficiency not associated with a trend towards lower stomatal conductance in the most recent genotypes. However, genetic advance Researchdoes not appear related to changes in photosynthesis rates on area basis when measured in the flag leaf or the spike,but only to a higher, whole‐spike photosynthesis. Results also indirectly support the concept that under potential yield conditions, the spike contributed more than the flag leaf to kernel formation.

关键词： Carbon isotopes grain yield net carbon exchange nitrogen content yield potential

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