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Dynamics of cooperative emissions in a cascade three-level molecular system driven by an ultrashort laser pulse

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Chinese Physics B 2008年第11期17卷 4211-4217页

作者：刘纪彩王春兴 gel’mukhanov faris 王传奎 College of Physics and Electronics Shandong Normal University Jinan 250014 China Department of Theoretical Chemistry School of Biotechnology Royal Institute of Technology SE-10691 Stockholm Sweden

This paper investigates the dynamics of cooperative emissions in a cascade three-level system driven by an ultra, short laser pulse by solving numerically the full-wave Maxwell-Bloch equations. The 4, 4＇-bis（dimethylamino） stilbene molecule is used as the model molecule because of its strong two-photon absorption property. The two-colour cooperative emissions are studied as functions of molecular number density and dephasing rate of the dipole coherence. The propagation effects on the evolution of the cooperative radiations are also taken into account. The cooperative radiations are enhanced for large number density of the molecule, while the fast dephasing of the dipole coherence reduces the intensity of the cooperative radiations and delays the emission times or even inhibits the formation of the emissions. The delay time of the radiation decreases with the increase of the molecular number density and the propagation distance.

关键词： superfluorescence ultra-short laser pulse 4 4'-bis(dimethylamino) stilbene organic molecule Maxwell-Bloch equations

Finite element analysis on the static and fatigue characteristics of composite multi-leaf spring

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第3期13卷 159-164页

作者： Joo-teck Jeffrey KUEH Tarlochan faris Department of Mechanical Engineering Universiti Tenaga Nasional

This paper investigated the static and fatigue behaviors of steel and composite multi-leaf spring using the ANSYS V I 2 software. The dimensions of an existing conventional leaf spring of a light commercial vehicle were used. The same dimensions were used to design composite multi-leaf spring for the two materials, E-glass fiber/epoxy and E-glass fiber/vinyl ester, which are of great interest to the transportation industry. Main consideration was given to the effects of material composition and its fiber orientation on the static and fatigue behaviors of leaf spring. The design constraints were bending stresses, deflection and fatigue life. Compared to the steel leaf spring, the designed composite spring has much lower bending stresses and deflections and higher fatigue life cycles.

关键词： Leaf spring Composites Finite element Stress Deflection Fatigue

Assuring enhanced privacy violation detection model for social networks

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International Journal of Intelligent Computing and Cybernetics 2022年第1期15卷 75-91页

作者： Ali Altalbe faris Kateb Faculty of Computing and Information Technology King Abdulaziz UniversityJeddahSaudi Arabia

Purpose-Virtually unlimited amounts of data collection by cybersecurity systems put people at risk of having their privacy *** networks like Facebook on the Internet provide an overplus of knowledge concerning their *** users relish exchanging data online,only some data are meant to be interpreted by those who see value in *** is now essential for online social network(OSN)to regulate the privacy of their users on the *** paper aims to propose an efficient privacy violation detection model(EPVDM)for ***/methodology/approach-In recent months,the prominent position of both industry and academia has been dominated by privateness,its breaches and strategies to dodge privacy *** around the world have become aware of the effects of violating privacy and its effect on them and other *** privacy violations are detected,they must be reported to those affected and it’s supposed to be mandatory to make them to take the next *** there are different approaches to detecting breaches of privacy,most strategies do not have a functioning tool that can show the values of its subject *** EPVDM for Facebook,based on a deep neural network,is proposed in this research ***-The main aim of EPVDM is to identify and avoid potential privacy breaches on Facebook in the *** analyses in comparison with major intrusion detection system(IDS)to detect privacy violation show that the proposed methodology is robust,precise and *** chances of breaches or possibilities of privacy violations can be identified very ***/value-All the resultant is compared with well popular methodologies like adaboost(AB),decision tree(DT),linear regression(LR),random forest(RF)and support vector machine(SVM).It’s been identified from the analysis that the proposed model outperformed the existing techniques in terms of accuracy(94%),precision(99.1%),recall(92.43%),f-score(95.

关键词： Privacy violation Detection IDS Social network Accuracy Recall Precision F-score

Finite Element Analysis of Porous Titanium Alloy Hip Stem to Evaluate the Biomechanical Performance During Walking and Stair Climbing

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Journal of Bionic Engineering 2019年第6期16卷 1103-1115页

作者： Sami Emad Alkhatib Hassan Mehboob faris Tarlochan School of Mechanical and Chemical Engineering M050The University of Western Australia35 Stirling HighwayCrawleyPerthWA6009Australia Department of Engineering Management College of EngineeringPrince Sultan UniversityRiyadhKingdom of Saudi Arabia Department of Mechanical and Industrial Engineering College of EngineeringQatar UniversityDohaQatar

Despite the success of cementless hip stem,stress shielding still presents a serious problem leading to bone *** incorporating porous cellular structures represent a promising ***,this study validates the finite element models of titanium(Ti)alloy(Ti-6Al-4V)porous stem and effective porous *** effective porous stems with strut thicknesses 0.33 mm-1.25 mm(18%-90%porosity)under different loading conditions were *** results of finite element models revealed that changing the load type and porosity affect stress *** loads yield the maximum stress levels while walking loads result in the lowest stresses in the ***,the point load results in the maximum stress shielding and micromotions(-19% to 18%,40μm to 703μm),as compared to walking(-17.5% to 3%,35μm to 242μm)and climbing loads(-7% to 1.6%,30μm to 221 μm).Finally,effective porous stems of strut thickness 0.87 mm exhibit the lowest stress shielding signals(<5%)under all loading conditions.

关键词： porous cellular microstructures porous hip stems physiological loads finite element analysis stress shielding

Synchronization and wave propagation in neuronal network under field coupling

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Science China(Technological Sciences) 2019年第3期62卷 448-457页

作者： LV Mi MA Jun YAO YuanGen ALZAHRANI faris Department of Physics Lanzhou University of Technology College of Electrical and Information Engineering Lanzhou University of Technology Department of Physics College of Science Huazhong Agricultural University NAAM-Research Group Department of Mathematics King Abdulaziz University

Electric and chemical synapse play important role in connecting neurons and thus signal propagation can be realized between neurons. External electric stimulus can change the excitability of neuron and then the electrical activities can be modulated completely. Continuous fluctuation of ion concentration in cell can induce complex time-varying electromagnetic field during the exchange of charged ions across the membrane of neuron. Polarization and magnetization in the media(and neuron), which exposed to electromagnetic radiation, can modulate the dynamical response and mode transition in electrical activities of neurons. In this paper, magnetic flux is used to describe the effect of electromagnetic field, and the three-variable HindmarshRose neuron model is updated to propose a four-variable neuron model that the effect of electromagnetic induction and radiation can be explained. Based on the physical law of electromagnetic induction, exchange of charged ions and flow of ion currents will change the distribution of electromagnetic filed in cell, and each neuron will be exposed to the superimposed field triggered by other neurons. Therefore, signal exchange could occur even synapse coupling between neurons is removed in the case of field coupling. A chain network is proposed to investigate the signal exchange between neurons under field coupling when synapse coupling is not available. It is found that field coupling between neurons can change the collective behaviors in electrical activities. A statistical factor of synchronization and spatial patterns are calculated, these results confirmed that field coupling is effective for signal communication between neurons. In the end, open problems are suggested for readers' extensive guidance in this field.

关键词： neuron memristor magnetic flux synchronization pattern formation

Performance assessment of buildings via post-occupancy evaluation： A case study of the building of the architecture and software engineering departments in Salahaddin University-Erbil, Iraq

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Frontiers of Architectural Research 2017年第3期6卷 412-429页

作者： faris All Mustafa Department of Architecture College of Engineering Salahaddin University-Erbil Kurdistan Iraq

Buildings are established to meet the needs and desires of users. The purpose of a building is defeated if its users are not satisfied by the overall buildingl performance. This study determines whether the users of the building of the architectural and software engineering departments at Salahaddin University-Erbil are satisfied with overall performance attributes. Assessment using users as a benchmark shows that the potentiat for improving the performance of a building is tremendous. This paper develops a post-occupancy evaluation （POE） framework that integrates building performance attributes for university buildings and facilities in the Iraqi Kurdistan region based on users＇ satisfaction. The objectives were to identify the concept of POE in relation to building performance, to determine the performance level of an existing building, and to determine correlation between building performance and users＇ satisfaction level. Results showed that 88% of building performance attributes is highly correlated with users＇ satisfaction. The compelling correlational results confirmed the relevance of POE as a building performance tool. The thrust of the findings indicates that the indicators and variables used in assessing the level of building performance are significant in determining levels of users＇ satisfaction in university buildings and facilities.

关键词： Post occupancyevaluation University buildings Building performance User satisfaction Correlation Erbil city

Olive oil consumption and non-alcoholic fatty liver disease

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World Journal of Gastroenterology 2009年第15期15卷 1809-1815页

作者： Nimer Assy faris Nassar Gattas Nasser Maria Grosovski Liver Unit Ziv Medical CenterSafedIsrael Faculty of Medicine Technion Institute Department of Medicine Western Galilee Hospital Department of Biotechnology Ort-Braude College

The clinical implications of non-alcoholic fatty liver diseases(NAFLD)derive from their potential to progress to fibrosis and *** dietary fat intake,excessive intake of soft drinks,insulin resistance and increased oxidative stress results in increased free fatty acid delivery to the liver and increased hepatic triglyceride(TG)*** olive oil-rich diet decreases accumulation of TGs in the liver,improves postprandial TGs,glucose and glucagonlike peptide-1 responses in insulin-resistant subjects, and upregulates glucose transporter-2 expression in the *** principal mechanisms include:decreased nuclear factor-kappaB activation,decreased lowdensity lipoprotein oxidation,and improved insulin resistance by reduced production of inflammatory cytokines(tumor necrosis factor,interleukin-6)and improvement of jun N-terminal kinase-mediated phosphorylation of insulin receptor *** beneficial effect of the Mediterranean diet is derived from monounsaturated fatty acids,mainly from olive *** this review,we describe the dietary sources of the monounsaturated fatty acids,the composition of olive oil,dietary fats and their relationship to insulin resistance and postprandial lipid and glucose responses in non-alcoholic steatohepatitis,clinical and experimental studies that assess the relationship between olive oil and NAFLD,and the mechanism by which olive oil ameliorates fatty liver,and we discuss future perspectives.

关键词： Liver steatosis Fatty liver Olive oil Fatty acids Monounsaturated Non-alcoholic steatohepatitis Lipids Oleic acid Non-alcoholic fatty liver disease

Intra-and inter-species variations in carbon content of 14 major tree species in Northeast China

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Journal of Forestry Research 2021年第6期32卷 2545-2556页

作者： faris Rafi Almay Widagdo Fengri Li Longfei Xie Lihu Dong Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityHarbinHeilongjiang150040People’s Republic of China

Reducing greenhouse gas emissions is one of the major challenges in combating global ***,including in the form of carbon dioxide(CO_(2)),is considered an essential greenhouse gas under human control to demonstrate success in emission ***,many carbon stock quantifications in forest ecosystems still rely on the estimated 50%carbon content instead of more precise species-,tissue-and site-specific ***,this study aimed to thoroughly measure and analyze the carbon content and variability using the 14 major tree species in Northeast *** 600 trees were destructively sampled from three different major mountainous regions(i.e.,the Changbai,Daxing’an,and Xiaoxing’an mountains),and the carbon contents of each species were precisely measured to the sub-tissue *** contents varied significantly between species,with foliage carbon mostly found to be the highest,while root carbon contents were the *** carbon contents can be ranked as:Ulmus laciniata(43.4%)

关键词： Carbon concentration Carbon sequestration Hardwoods Conifers Temperate forest

Archimedes Optimization with Deep Learning Based Aerial Image Classification for Cybersecurity Enabled UAV Networks

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Computer Systems Science & Engineering 2023年第11期47卷 2171-2185页

作者： faris Kateb Mahmoud Ragab Information Technology Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia

The recent adoption of satellite technologies,unmanned aerial vehicles(UAVs)and 5G has encouraged telecom networking to evolve into more stable service to remote areas and render higher ***,security concerns with drones were increasing as drone nodes have been striking targets for cyberattacks because of immensely weak inbuilt and growing poor security *** study presents an Archimedes Optimization with Deep Learning based Aerial Image Classification and Intrusion Detection(AODL-AICID)technique in secure UAV *** presented AODLAICID technique concentrates on two major processes:image classification and intrusion *** aerial image classification,the AODL-AICID technique encompasses MobileNetv2 feature extraction,Archimedes Optimization Algorithm(AOA)based hyperparameter optimizer,and backpropagation neural network(BPNN)based *** addition,the AODLAICID technique employs a stacked bi-directional long short-term memory(SBLSTM)model to accomplish intrusion detection for cybersecurity in UAV *** the final stage,the Nadam optimizer is utilized for parameter tuning of the SBLSTM *** experimental validation of the AODLAICID technique is tested and the obtained values reported the improved performance of the AODL-AICID technique over other models.

关键词： Aerial image classification remote sensing intrusion detection cybersecurity deep learning