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Quantifying non-classical correlations under thermal effects in a double cavity optomechanical system

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Chinese Physics B 2020年第2期29卷 121-128页

作者： mohamed Amazioug Larbi Jebli Mostafa Nassik nabil Habiballah Department of Physics Ecole Normale Supérieure(ENS)Mohammed V University in RabatMorocco LPHE-MS Department of PhysicsFaculty of SciencesMohammed V UniversityRabatMorocco EPTHE Department of PhysicsFaculty of SciencesIbn Zohr UniversityAgadirMorocco Faculty of Applied Sciences Ibn Zohr UniversityAit-MelloulMorocco Abdus Salam International Center for Theoretical Physics Strada Costiera1134151TriesteItaly

We investigate the generation of quantum correlations between mechanical modes and optical modes in an optomechanical system,using the rotating wave *** system is composed of two Fabry-Pérot cavities separated in space;each of the two cavities has a movable *** aim is the evaluation of entanglement between mechanical modes and optical modes,generated by correlations transfer from the squeezed light to the system,using Gaussian intrinsic entanglement as a witness of entanglement in continuous variables Gaussian states,and the quantification of the degree of mixedness of the Gaussian states using the ***,we quantify nonclassical correlations between mechanical modes and optical modes even beyond entanglement by considering Gaussian geometric discord via the Hellinger ***,entanglement,mixdness,and quantum discord are analyzed as a function of the parameters characterizing the system(thermal bath temperature,squeezing parameter,and optomechanical cooperativity).We find that,under thermal effect,when entanglement vanishes,purity and quantum discord remain ***,the Gaussian Hellinger discord is more robust than *** effects of the other parameters are discussed in detail.

关键词： cavity optomechanics quantum correlations Gaussian intrinsic entanglement purity Gaussian Hellinger discord Gaussian geometric discord

μPMU-based smart adaptive protection scheme for microgrids

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Journal of Modern Power Systems and Clean Energy 2019年第4期7卷 887-898页

作者： mohamed Salah ELBANA nabil ABBASY Ashraf MEGHED Nahil SHAKER Electrical Engineering Department Faculty of EngineeringAlexandria UniversityLotfy El-Sied St.P.O.ElhadaraAlexandria 21544Egypt

The concepts of microgrids(MGs)and smart grid represent the recent targeted revolution towards fully smart electrical network integrated with high penetration of renewable energy sources(RESs).The protection system of MGs becomes a challenge due to variable characteristics of its currents,bidirectional power flow and output power fluctuations of RES,causing selectivity and sensitivity issues for conventional protective devices(PDs)with fixed *** this paper,a smart protection scheme(SPS)is proposed using micro-phasor measurement units(μPMUs)to obtain the continuous rapid synchronized phasor measurement *** it is communicated with a microgrid central controller(MGCC)through highly reliable communication architecture to carry out online smart adaptive protection *** index coefficients and abnormality coefficients are calculated for each feeder to detect the fault location and the abnormality *** modeling of an MG including 10-bus connected distribution system with integrated distributed generation(DG)is simulated using ETAP *** proposed protection algorithm is modeled and evaluated using MATLAB *** proposed fault detector and abnormality detector can enable quick and accurate fault identification and isolation.

关键词： Fault index coefficients Microgrid(MG) Micro-phasor measurement unit(μPMU) Renewable energy source(RES) Smart protection scheme(SPS)

Network Analysis for Projects with High Risk Levels in Uncertain Environments

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Computers, Materials & Continua 2022年第1期70卷 1281-1296页

作者： mohamed Abdel-Basset Asmaa Atef mohamed Abouhawwash Yunyoung Nam nabil M.AbdelAziz Faculty of Computers and Informatics Zagazig UniversityZagazig44519Egypt Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast Lansing48824MIUSA Department of Computer Science and Engineering Soonchunhyang UniversityAsan31538Korea

The critical path method is one of the oldest and most important techniques used for planning and scheduling *** main objective of project management science is to determine the critical path through a network representation of *** critical path through a network can be determined by many algorithms and is useful for managing,monitoring,and controlling the time and cost of an entire *** essential problem in this case is that activity durations are uncertain;time presents considerable uncertainty because the time of an activity is not always easily or accurately *** issue increases the need to use neutrosophic theory to solve the critical path ***-world problems are characterized by a lack of precision,consistency,and *** concept of neutrosophic sets has been introduced as a generalization of fuzzy,intuitionistic fuzzy,and crisp sets to overcome the ambiguity surrounding real-world ***-,falsity-,and indeterminacy-membership functions are used to express neutrosophic *** study was performed to examine a neutrosophic event-oriented algorithm for determining the critical path in activity-on-arc *** activity time estimates are presented as trapezoidal neutrosophic numbers,and score and accuracy functions are used to obtain a crisp model of the *** appropriate numerical example is then used to explain the proposed method.

关键词： Project management project life cycle project planning project scheduling CPM neutrosophic set theory trapezoidal neutrosophic number

Evaluation of urea breath test as a diagnostic tool for Helicobacter pylori infection in adult dyspeptic patients

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World Journal of Gastroenterology 2024年第17期30卷 2302-2307页

作者： Zeinab nabil Ahmed Said Asmaa mohamed El-Nasser Department of Medical Microbiology&Immunology Faculty of Medicine for Girls Al-Azhar UniversityNasr City 11754CairoEgypt

In this editorial,we discuss the article in the World Journal of *** article conducts a meta-analysis of the diagnostic accuracy of the urea breath test(UBT),a non-invasive method for detecting Helicobacter pylori(***)infection in *** is based on radionuclide-labeled *** methods,both invasive and non-invasive,are available for diagnosing *** infection,inclu-ding endoscopy with biopsy,serology for immunoglobulin titers,stool antigen analysis,and *** guidelines recommend UBTs as the primary choice for diagnosing *** infection and for reexamining after eradication *** is used to be the first choice non-invasive test due to their high accuracy,specificity,rapid results,and ***,its performance remains unaffected by the distribution of *** in the stomach,allowing a high flow of patients to be *** its widespread use,the performance characteristics of UBT have been inconsistently described and remain incompletely *** are two UBTs available with Food and Drug Administration approval:The 13C and 14C *** tests are affordable and can provide real-time *** may prefer the 13C test because it is non-radioactive,compared to 14C which uses a radioactive isotope,especially in young children and pregnant *** there was heterogeneity among the studies regarding the diagnostic accuracy of both UBTs,13C-UBT consistently outperforms the *** makes the 13C-UBT the preferred diagnostic ***,the provided findings of the meta-analysis emphasize the significance of precise considerations when choosing urea dosage,assessment timing,and measurement techniques for both the 13C-UBT and 14C-UBT,to enhance diagnostic precision.

关键词： Helicobacter pylori Urea breath test Diagnosis Diagnostic test accuracy Meta-analysis

Numerical Simulation of Turbulent Swirling Pipe Flow with an Internal Conical Bluff Body

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Fluid Dynamics & Materials Processing 2021年第2期17卷 455-470页

作者： Jinli Song nabil Kharoua Lyes Khezzar mohamed Alshehhi Khalifa University of Science and Technology Abu DhabiUnited Arab Emirates National Polytechnic School of Constantine ConstantineAlgeria

Turbulent swirling flow inside a short pipe interacting with a conical bluff body was simulated using the commercial CFD code *** geometry used is a simplified version of a novel liquid/gas separator used in multiphase flow *** turbulence models,belonging to the Reynolds averaged Navier-Stokes(RANS)equations framework,are *** are,RNG k-ε,SST k-ωand the full Reynolds stress model(RSM)in their steady and unsteady *** and unsteady RSM simulations show similar *** to other turbulence models,they yield the best predictions of the mean velocity profiles though they exhibit some discrepancies in the core *** influence of the Reynolds number on velocity profiles,swirl decay,and wall pressure on the bluff body are also *** Reynolds numbers generating a Rankine-like velocity profile,the width and magnitude of flow reversal zone decreases along the pipe axis disappearing downstream for lower Reynolds *** tangential velocity peaks increase with increasing Reynolds *** swirl decay rate follows an exponential form in accordance with the existing *** flow features would affect the performance of the real separator and,thus,the multiphase flow meter,noticeably.

关键词： Swirling pipe flow conical bluff body CFD separator

Validation of degree-day models for predict!ng the emergence of two fruit flies (Diptera: lephritidae) in northeast Egypt

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Insect Science 2021年第1期28卷 153-164页

作者： mohamed HBayoumy J.P.Michaud Faten AABadr nabil MGhanim Faculty of Agriculture Economic Entomology DepartmentMansoura UniversityMansouraEgypt Department of Entomology Kansas State UniversityAgricultural Research Center-HaysHaysKansasUSA Agricultural Research Center Plant Protection Research InstituteDokkyGizaEgypt

We estimated thermal developmental thresholds(7o)and degree-day(DD)constants for the immature stages of two tephritid pests,Bcictrocera zonata(Saunders)and Ceratitis capitata(Weidenmann).Males of both species were trapped in an Egyptian guava orchard during the fruiting seasons of 2016 and 2017 and trap catches were compared with peak flights predicted by the DD model based on local weather *** capitata had faster development than *** at 20 and 25°C,but their overall developmental rate was similar at 30 and 35°*** thermal threshold of development(7o)of *** was higher than that of ***,indicating greater sensitivity to *** 35°C yielded the fastest development of both species,survival was higher at 30°C,with *** experiencing a slight advantage,suggesting better tropical *** development of *** and *** was estimated to require 338 and 373 d,respectively,and 616 and 424 DD for a complete *** catches over both seasons showed good correspondence to peaks of fly activity predicted by the DD models;deviations from expectation ranged from 0 to 7 d for both fly *** species had four overlapping generations per season,with *** abundance peaking in the first generation in both years,but only in 2016 for *** models predict about eight and 12 generations per year in northeast Egypt for *** and ***,*** models should be useful for timing pest control measures to coincide with periods of peak fly activity in fruit orchards.

关键词： Bactrocera zonata Ceratitis capitata development forecasting thermal threshold

A Parametric Study of Mesh Free Interpolation Based Recovery Techniques in Finite Element Elastic Analysis

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Computer Modeling in Engineering & Sciences 2019年第11期121卷 687-786页

作者： Mohd.Ahmed mohamed Hechmi El Ouni Devinder Singh nabil Ben Kahla College of Engineering Main CampusGregarK.K.UniversityAbha61421KSA Minitry of Information Soochan BhavanCGO ComplexDelhi110003India

The paper presents a parametric study on interpolation techniques based postprocessed error estimation in finite element elastic analysis by varying important parameters of recovery,interpolation scheme and type of patch *** quality of error estimation with recovery parameters is compared in terms of local and global effectivity of error estimation,rate of error convergence,and adaptively refined meshes.A mesh free moving least square interpolation technique with proven reliability and effectivity is introduced for improving the recovery of finite element solution *** post-processed finite element solutions of elastic problems are presented for performance study under different parameters of recovery *** study concludes that recovery parameters of interpolation method have pronounced effect on the recovery of finite element solution error and analysis in adaptive environment.

关键词： Effectivity error norm moving least square interpolation least square interpolation recovery techniques

Amination of biochar surface from watermelon peel for toxic chromium removal enhancement

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Chinese Journal of Chemical Engineering 2021年第8期34卷 199-222页

作者： mohamed A.El-Nemr Ibrahim M.A.Ismail nabil M.Abdelmonem Ahmed El Nemr Safaa Ragab Department of Chemical Engineering Faculty of EngineeringCairo UniversityGizaEgypt Renewable Energy Program Zewail City of Science and TechnologyEgypt Environmental Division National Institute of Oceanography and FisheriesKayet BeyEl-AnfoushyAlexandriaEgypt

Watermelon peel residues were used to produce a new biochar by dehydration *** new biochar has undergone two methods of chemical modification and the effect of this chemical modification on its ability to adsorb Cr(VI)ions from aqueous solution has been *** biochars,Melon-B,Melon-BO-NH_(2) and Melon-BO-TETA,were made from watermelon peel via dehydration with 50%sulfuric acid to give Melon-B followed by oxidation with ozone and amination using ammonium hydroxide to give Melon-BO-NH_(2) or Triethylenetetramine(TETA)to give *** prepared biochars were characterized by BET,BJH,SEM,FT-IR,TGA,DSC and EDAX *** highest removal percentage of Cr(VI)ions was 69%for Melon-B,98%for Melon-BO-NH_(2) and 99%for Melon-BO-TETA biochars of 100 mg·L^(−1) Cr(VI)ions initial concentration and 1.0 g·L^(−1) adsorbents *** unmodified biochar(Melon-B)and modified biochars(Melon-BO-NH_(2) and Melon-BO-TETA)had maximum adsorption capacities(Q_(m))of 72.46,123.46,and 333.33 mg·g^(−1),*** amination of biochar reduced the pore size of modified biochar,whereas the surface area was *** obtained data of isotherm models were tested using different error function *** Freundlich,Tempkin and Langmuir isotherm models were best fitted to the experimental data of Melon-B,Melon-BO-NH_(2) and Melon-BO-TETA,*** adsorption rate was primarily controlled by pseudo-second–order rate ***,the functional groups interactions are important for adsorption mechanisms and expected to control the adsorption *** adsorption for the Melon-B,Melon-BO-NH_(2) and Melon-BO-TETA could be explained for acid–base interaction and hydrogen bonding interaction.

关键词： Waste treatment Powder technology Citrullus lanatus Hexavalent chromium Biochar amination Adsorption

Bioresorbable stent unloading during percutaneous coronary intervention:Early detection and management

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World Journal of Cardiology 2024年第10期16卷 616-618页

作者： nabil Eid mohamed Abdel Wahab Amardev Singh Thanu Department of Anatomy Division of Human BiologySchool of MedicineIMU UniversityKuala Lumpur 57000Kuala LumpurMalaysia Department of Pediatrics School of MedicineIMU UniversityClinical CampusBatu Paha 83000JohorMalaysia M.Kandiah Faculty of Medicine and Health Sciences University Tunku Abdul RahmanKajang 43000SelangorMalaysia

In this letter,we comment on a recent case report by Sun et al in the World Journal of *** report describes the successful management of a rare complication:The unloading or detachment of a bioresorbable stent(BRS)during percutaneous coronary intervention(PCI)in a male *** unloading of BRS was detected via angiography and intravascular ultrasound(IVUS)imaging of the left coronary artery and left anterior descending *** this case is interesting,the authors’report lacked crucial ***,insufficient information about the type of BRS used,potential causes of BRS unloading,or whether optical coherence tomography(OCT)imaging for coronary arteries was performed before,during,or after *** OCT imaging of coronary arteries before PCI can potentially prevent BRS unloading due to its higher resolution compared to *** addition,despite detecting myocardial bridging during the PCI,the authors did not provide any details regarding this *** we discuss the various types of BRS,the importance of OCT in PCI,and the clinical relevance of myocardial bridging.

关键词： Coronary artery diseases Percutaneous coronary intervention Optical coherence tomography Bioresorbable/Biodegradable stents Stent unloading/detachment Myocardial bridge Intravascular ultrasound Coronary angiography