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Involvement of Quebracho tannins in diet alters productive and reproductive efficiency of postpartum buffalo cows

Animal Nutrition 2019年第1期5卷 80-86页

作者： Sobhy m.A.Sallam marwa F.A.Attia adel N.m.Nour El-Din Samir Z.El-Zarkouny adel m.saber Hani m.El-Zaiat moustafa m.Zeitoun Department of Animal and Fish Production Faculty of AgricultureAlexandria University Animal Production Research Institute Agricultural Research CenterDokki

This study was conducted to investigate the effects of 10 weeks supplementation of Quebracho tannins(QT; 0 [control], 100 [QT100] or 200 g/[cow$d] [QT_(200)]) to 30 multiparous postpartum buffalo cows(10 cows per group) on milk yield and composition, blood metabolites and reproductive *** of QT100 had no significant effect on milk yield, whereas QT_(200) decreased(P mpared with the control group, both QT levels decreased(P milk(FCm)yield, but no significant effects were found on percentages of milk fat and protein. Contrariwise, yields of milk fat, lactose and milk protein were decreased(P mented. The solids nonfat(SNF) percentage and yield were decreased(P mentation. moreover, QT tended to numerically reduce total number of ovarian follicles, number of small follicles, peripheral progesterone concentration and conception rate. Supplementation of QT_(200) numerically increased number of large follicles, mean diameter of large follicle, number and diameters of corpora lutea. The inclusion of QT_(200) shortened days open(DO) and decreased number of services per ***, QT did not show significant effects on serum total protein, albumin, globulin, glucose,cholesterol and triglycerides concentrations. Supplementation of QT100 caused an increase(P m urea compared with that in control and QT_(200) groups. Generally, QT decreased(P m creatinine concentration. Therefore, the supplementation of a commercial QT to early lactating Egyptian buffalo cows displayed negative consequences on their productive and reproductive performances.

关键词： Buffalo Tannins milk traits Blood metabolites Ovarian follicles Conception rate

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Hysteresis Loops and Phase Diagrams of the Spin-1 Ising model in a Transverse Crystal Field

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Chinese Physics Letters 2012年第1期29卷 194-197页

作者： S.Bouhou I.Essaoudi A.Ainane m.saber J.J.de miguel m.Kerouad Laboratoire de Physique des materiaux et modelisations des Systemes Unite Associee au CNRST-URAC 08Department of PhysicsFaculty of SciencesUniversity of Moulay IsmailB.P.11201MeknesMorocco max-Planck-Institut fur Physik Complexer Systeme Nohnitzer Str.38D-01187 DresdenGermany Dpto.Fisica de la materia Condensada C-3 and Institut of Materials Sciences“Nicolas Cabrera”Univ.AutonomaCantoblanco E-28049-MadridSpain

Within the framework of the effective-field theory with a probability distribution technique,which accounts for the self-spin correlation functions,the ferromagnetic spin-1 Ising model with a transverse crystal field on honeycomb,square and simple cubic lattices is *** have investigated the effect of the transverse crystal field on the phase diagrams,magnetization,hysteresis loops and χ_(z,h) of the system.A number of interesting phenomena of the system are discussed.

关键词： transverse Ising crystal

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Developing a Low-cost,smart,handheld electromyography biofeedback system for telerehabilitation with Clinical Evaluation

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medicine in Novel Technology and Devices 2021年第2期10卷 17-24页

作者： mazen m.Yassin Abubakr m.saber mohamed N.Saad Ashraf m.Said Ayman m.Khalifa Biomedical Engineering Department Minia UniversityMinia61111Egypt Department of Biomedical Engineering Helwan UniversityCairo11731Egypt J.Crayton Pruitt Family Department of Biomedical Engineering University of FloridaGainesvilleFL32611USA

Existing telerehabilitation systems require highly experienced personnel to interpret a patient’s muscle activity in a specialized lab,limiting the biofeedback available at the patient’s *** addition,there is no contact between physiotherapists and patients *** study designed and implemented an interactive teleelectromyography(EmG)biofeedback device for facilitating patients’rehabilitation and giving the physiotherapist the ability to develop and monitor personalized treatment for each patient precisely and *** device comprised a device that acquires EmG signals during muscular activity and two cell phone applications,one for the patient and the other for the physiotherapist;traced muscle activity;and enabled the physiotherapist to monitor and control the patients’sessions through a Google Firebase *** signals were acquired from five subjects,and results were compared to a certified *** evaluation process involved two metrics,correlation coefficient and root mean square value(RmSV).The proposed EmG biofeedback device is an integrated solution with numerous features,such as low cost,handheld size,patient-friendly interface,contributions to rapid healing,and secure *** addition,it provides raw EmG signals for applied research applications.

关键词： Electromyography EmG Biofeedback Physiotherapy Telerehabilitation Home use Rehabilitation

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mesoporous WO_3-graphene photocatalyst for photocatalytic degradation of methylene Blue dye under visible light illumination

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Journal of Environmental Sciences 2018年第4期30卷 328-337页

作者： adel A.Ismail m.Faisal adel Al-Haddad Wastewater Treatment and Reclamation Technologies (WTRT) Water Research Center Kuwait Institute for Scientific Research Advanced materials and Nano-Research Centre Najran University

Advanced oxidation technologies are a friendly environmental approach for the remediation of industrial wastewaters. Here, one pot synthesis of mesoporous WO3 and WO3-graphene oxide（GO） nanocomposites has been performed through the sol–gel method. Then, platinum（Pt） nanoparticles were deposited onto the WO3 and WO3-GO nanocomposite through photochemical reduction to produce mesoporous Pt/WO3 and Pt/WO3-GO nanocomposites. X-ray diffraction（XRD） findings exhibit a formation of monoclinic and triclinic WO3 phases. Transmission Electron microscope（TEm） images of Pt/WO3-GO nanocomposites exhibited that WO3 nanoparticles are obviously agglomerated and the particle sizes of Pt and WO3 are ~ 10 nm and 20–50 nm, respectively. The mesoporous Pt/WO3 and Pt/WO3-GO nanocomposites were assessed for photocatalytic degradation of methylene Blue（mB） as a probe molecule under visible light *** findings showed that mesoporous Pt/WO3, WO3-GO and Pt/WO3-GO nanocomposites exhibited much higher photocatalytic efficiencies than the pure WO3. The photodegradation rates by mesoporous Pt/WO3-GO nanocomposites are 3, 2 and 1.15 times greater than those by mesoporous WO3, WO3-GO, and Pt/WO3, respectively. The key factors of the enhanced photocatalytic performance of Pt/WO3-GO nanocomposites could be explained by the highly freedom electron transfer through the synergetic effect between WO3 and GO sheets, in addition to the Pt nanoparticles that act as active sites for O2 reduction, which suppresses the electron hole pair recombination in the Pt/WO3-GO nanocomposites.

关键词： mesoporous Pt/WO3 nanocomposites Graphene oxide methylene Blue photodegradation Visible light

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Service life prediction of AP/Al/HTPB solid rocket propellant with consideration of softening aging behavior

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Chinese Journal of Aeronautics 2019年第2期32卷 361-368页

作者： Walid m.adel Guozhu LIANG School of Astronautics Beihang University

The aging behavior of softening composite solid propellant was investigated by measuring its mechanical and ballistic prosperities during prolonged storage at elevated and room temperatures. Accelerated aging was conducted at 65 °C for 231 days while the normal aging was performed at 25 ± 3 °C and relative humidity less than 50% for 8 years. The mechanical properties were obtained from uniaxial tensile tests for the aged propellant specimens while the ballistic properties were determined from static firing tests of subscale motors aged for 112 days at 65 °C. The mechanical results show that the maximum tensile strength and Young's modulus initially increase and subsequently decrease with increasing aging time, while the maximum tensile strain generally increases with increasing aging time. The ballistic properties like burning rate show a small change which cannot affect the ballistic performance. The experimental results show that the changes in the mechanical properties are significant during the aging period, but the burning rate does not undergo significant changes. From this study, it is observed that the propellant ages through a combination of reactions like post-cure, oxidative cross-linking, chain scission, and hydrolysis. The chain scission and the hydrolysis effect are the most significant process, which makes the propellant soft and extendible. The observed aging mechanism has been modeled using an exponential function with two terms which can describe the complex behavior of the aging. By applying Arrhenius equation,the activation energy values were obtained based on the propellant mechanical properties. The shelf life of this propellant formulation at 25 °C is predicted to be 13 years using the modulus as failure criteria and control parameter.

关键词： Aging Hydrolysis Service life Softening behavior Solid propellant

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Topology optimization and seismic collapse assessment of shape memory alloy(SmA)-braced frames:Effectiveness of Fe-based SmAs

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Frontiers of Structural and Civil Engineering 2022年第3期16卷 281-301页

作者： Aydin HASSANZADEH saber mORADI Department of Civil Engineering Ryerson UniversityToronto M5B 2K3Canada

This paper presents a seismic topology optimization study of steel braced frames with shape memory alloy(SmA)*** SmA-braced frames(SmA-BFs)with either Fe-based SmA or NiTi braces are determined in a performance-based seismic design *** topology optimization is performed on 5-and 10-story SmA-BFs considering the placement,length,and cross-sectional area of SmA bracing ***,strength,and performance-based design constraints are considered in the *** seismic response and collapse safety of topologically optimal SmA-BFs are assessed according to the FEmA P695 methodology.A comparative study on the optimal SmA-BFs is also presented in terms of total relative cost,collapse capacity,and peak and residual story *** results demonstrate that Fe-based SmA-BFs exhibit higher collapse capacity and more uniform distribution of lateral displacement over the frame height while being more cost-effective than NiTi braced *** addition to a lower unit price compared to NiTi,Fe-based SmAs reduce SmA material *** frames with Fe-based SmA braces,the SmA usage is reduced by up to 80%.The results highlight the need for using SmAs with larger recoverable strains.

关键词： topology optimization shape memory alloy Fe-based SmA steel braced frames performance-based seismic design collapse assessment

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metaheuristic Optimization Algorithm for Signals Classification of Electroencephalography Channels

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Computers, materials & Continua 2022年第6期71卷 4627-4641页

作者： marwa m.Eid Fawaz Alassery Abdelhameed Ibrahim mohamed saber Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Computer Engineering and Control Systems Department Faculty of EngineeringMansoura UniversityMansoura35516Egypt Department of Electronics and Communications Engineering Faculty of EngineeringDelta University for Science and TechnologyMansoura11152Egypt

Digital signal processing of electroencephalography(EEG)data is now widely utilized in various applications,including motor imagery classification,seizure detection and prediction,emotion classification,mental task classification,drug impact identification and sleep state *** the increasing number of recorded EEG channels,it has become clear that effective channel selection algorithms are required for various *** Whale Optimization method(Guided WOA),a suggested feature selection algorithm based on Stochastic Fractal Search(SFS)technique,evaluates the chosen subset of *** may be used to select the optimum EEG channels for use in Brain-Computer Interfaces(BCIs),the method for identifying essential and irrelevant characteristics in a dataset,and the complexity to be *** enables(SFS-Guided WOA)algorithm to choose the most appropriate EEG channels while assisting machine learning classification in its tasks and training the classifier with the ***(SFSGuided WOA)algorithm is superior in performance metrics,and statistical tests such as ANOVA and Wilcoxon rank-sum are used to demonstrate this.

关键词： Signals metaheuristics optimization feature selection multilayer perceptron support vector machines

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Developed mathematical technique for fractional stochastic point kinetics model in nuclear reactor dynamics

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Nuclear Science and Techniques 2018年第9期29卷 197-213页

作者： Ahmed E.Aboanber Abdallah A.Nahla adel m.Edress Department of mathematics Faculty of Science Taibah University Department of mathematics Faculty of Science Tanta University

Fractional stochastic kinetics equations have proven to be valuable tools for the point reactor kinetics model, where the nuclear reactions are not fully described by deterministic relations. A fractional stochastic model for the point kinetics system with multi-group of precursors,including the effect of temperature feedback, has been developed and analyzed. A major mathematical and inflexible scheme to the point kinetics model is obtained by merging the fractional and stochastic technique. A novel split-step method including mathematical tools of the Laplace transforms, mittage–Leffler function, eigenvalues of the coefficient matrix, and its corresponding eigenvectors have been used for the fractional stochastic matrix differential equation. The validity of the proposed technique has been demonstrated via calculations of the mean and standard deviation of neutrons and precursor populations for various reactivities: step, ramp, sinusoidal, and temperature reactivity feedback. The results of the proposed method agree well with the conventional one of the deterministic point kinetics equations.

关键词： Ito stochastic point kinetics equations Temperature feedback effects Wiener process Fractional calculus mittage–Leffler function

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Inverse full state hybrid projective synchronization for chaotic maps with different dimensions

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Chinese Physics B 2016年第9期25卷 251-256页

作者： adel Ouannas Giuseppe Grassi Laboratory of mathematics Informatics and Systems (LAMIS) University of Larbi Tebessi Tebessa 12002 Algeria University del Salento Dipartimento Ingegneria Innovazione 73100 Lecce Italy

A new synchronization scheme for chaotic（hyperchaotic） maps with different dimensions is ***,given a drive system map with dimension n and a response system with dimension m,the proposed approach enables each drive system state to be synchronized with a linear response combination of the response system *** method,based on the Lyapunov stability theory and the pole placement technique,presents some useful features：（i） it enables synchronization to be achieved for both cases of n 〈 m and n 〉 m;（ii） it is rigorous,being based on theorems;（iii） it can be readily applied to any chaotic（hyperchaotic） maps defined to ***,the capability of the approach is illustrated by synchronization examples between the two-dimensional H′enon map（as the drive system） and the three-dimensional hyperchaotic Wang map（as the response system）,and the three-dimensional H′enon-like map（as the drive system） and the two-dimensional Lorenz discrete-time system（as the response system）.

关键词： chaotic map full state hybrid projective synchronization inverse problem maps with different dimensions

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Carbon nanotube-based nanoelectromechanical resonatoras mass biosensor

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Chinese Physics B 2020年第7期29卷 583-587页

作者： Ahmed mElseddawy adel HPhillips Ahmed S Bayoumi Faculty of Graduate Studies University of WindsorWindsorOntarioCanada Faculty of Engineering Ain-Shams UniversityCairoEgypt Faculty of Engineering Kafr-Elsheikh UnversityKafr-ElsheikhEgypt

The use of single walled carbon nanotube-based nanoelectromechanical system(NEmS)resonator to sense the biomolecules'mass is investigated under the influence of an external ac-field.A single walled carbon nanotube(SWCNT)cantilever has been proposed and studied if the mass is attached at the tip or various intermediate *** shift of the resonant frequency and the quality factor have been investigated and show high sensitivity to the attached mass of biomolecule and its *** proposed SWCNT-based NEmS resonator is a good candidate for sensing and tracing biomolecules'mass as concentration of acetone in human exhale,resulting in a painless,correct,and simple diabetics'diagnosis.

关键词： single walled carbon nanotube nanoelectromechanical system resonator ac-field biomolecule

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