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Bedouin farms in the Saint Katherine mountainous area(South Sinai,Egypt)

Journal of Mountain Science 2019年第10期16卷 2232-2242页

作者： Kamal h.ShALTOUT khaled h.el-hamdi Safaa A.el-MASRY Ebrahem M.EID Botany Department Faculty of ScienceTanta UniversityTanta31527Egypt Soil Department Faculty of AgricultureMansoura UniversityMansoura35516Egypt Biology Department College of ScienceKing Khalid UniversityAbha61321P.O.Box9004Saudi Arabia Botany Department Faculty of ScienceKafr El-Sheikh UniversityKafr El-Sheikh33516Egypt

This study aims to assess the natural and cultivated plant species in 26 Bedouin farms in Saint Katherine Protectorate(SKP),identify their soil and water characteristics,and assess the suitability of these farms for the cultivation of some wild medicinal *** farms were selected to represent wide wadis with deep sand and clay deposits,gorge-like wadis covered with rock fragments of different sizes,spot-like oases,and the Al Q’aa *** TWINSPAN(two-way indicator species analysis)and DCA(detrended correspondence analysis)techniques,the 26 farms were classified into 5 groups(Ⅰ-Ⅴ)based on their floristic composition of wild *** groups reflect an elevation gradient among the farms above sea level from a mean of 119 m to a mean of1,865m.A total of 73 wild species were recorded,with47 in groupⅡ(500-1,000 m)and 25 in group V(>1,700 m).The common target species were Artemisia judaica,Acacia tortilis ***,Origanum syriacum *** and Varthemia montana(34.6%-26.9%).The cultivated speciesnumbered 25,with 17 in groupⅡ(500-1,000 m) andⅡin groupⅣ(1,500-1,700 m).The common fruit trees were olive,grape,fig,apple,palm,almond,apricot and pomegranate(73.0%-42.3%).Based on the soil characteristics,13 farms belong to soil class 2that describes good soils with moderate limitations,and 12 belong to soil class 3 that describes moderately good soils,which can be used regularly for crops after proper treatment.

关键词： Agroforestry Saint Katherine Protectorate Wild medicinal plants elevation gradient Multivariate analysis Wadi Feiran

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Denoising different types of acoustic partial discharge signals using power spectral subtraction

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high Voltage 2018年第1期3卷 44-50页

作者： Ramy hussein khaled Bashir Shaban Ayman h.el-hag Department of electrical and Computer Engineering University of British ColumbiaVancouverBCCanada Department of Computer Science and Engineering Qatar UniversityDohaQatar Department of electrical Engineering American University of SharjahSharjahUAE

Measuring acoustic emission(AE)of partial discharge(PD)phenomena can be adopted to estimate the condition of power ***,the environmental noise encountered with AE of PD measurements negatively affects the accuracy of PD localisation and ***,efficient signal denoising techniques are required for noise suppression and hence,better detection *** study deals with white noise and it is a continuation of a previously published work that deals with random *** published work addresses the random noise suppression using a method named,power spectral subtraction denoising(PSSD).This study applies PSSD to the PD signals contaminated with white noise and uses a novel scheme of noise power spectrum density *** types of AE signals are examined including signals produced by corona,surface,parallel,and void *** and real data demonstrate the superiority of the proposed method over the wavelet shrinkage denoising method as it can more effectively eliminate white noise and preserve signals of low signal-to-noise ratio.

关键词： power noise spectral

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Bioelectronic medicine in modulation of cortical spreading depolarization and beyond

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Neural Regeneration Research 2025年第2期20卷 481-482页

作者： khaled Alok Timothy G.White Chunyan Li Department of Neurosurgery Donald and Barbara Zucker School of Medicine at Hofstra/NorthwellHempsteadNYUSA Translational Brain Research Laboratory The Feinstein Institutes for Medical ResearchManhassetNYUSA

Bioelectronic interventions,specifically trigeminal nerve st imulat ion(TNS),have attracted considerable attention in conditions where cortical spreading depolarizations(CSDs)accompanied by compromised cerebral perfusion may exacerbate neurological *** pharmacological interventions have demonstrated initial potential in addressing CSDs,a standardized treatment approach has not yet been *** objective of this perspective is to explore emerging bioelectronic methodologies for addressing CSDs,particularly emphasizing TNS,and to underscore TNS’s capacity to enhance neurovascular coupling and cerebral perfusion.

关键词： cerebral perfusion electronic

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Study of Three Different Types of Plasma Ion Sources

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Plasma Science and Technology 2009年第5期11卷 604-608页

作者： M.M.ABDelRAhMAN h.el-KhABEARy Accelerators & Ion Sources Department Nuclear Research CenterAtomic Energy Authority

Three types of plasma ion sources designed, manufactured and optimized in the Accelerators and Ion Sources Department, Nuclear Research Center, Atomic Energy Authority are introduced. Different means were investigated to generate the discharge current and ion beam current extracted from the plasma. The various plasmas described include a DC glow discharge plasma, an arc discharge plasma and a radio frequency discharge plasma.

关键词： ion sources ionization processes sputtering and etching processes

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Special Mappings with Central Values on Prime Rings

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Algebra Colloquium 2020年第3期27卷 405-414页

作者： h.el Mir A.Mamouni L.Oukhtite Laboratory of Modelling and Mathematical Structures Department of Mathematics Faculty of Science and Technology of Fez Box 2202University S.M.Ben Abdellah FezMorocco Department of Mathematics Faculty of Science and Technology Box 509-BoutalamineUniversity Moulay IsmailErrachidiaMorocco

In this paper we investigate commutativity of prime rings with involution*of the second kind in which endomorphisms satisfy certain algebraic ***,we provide examples to show that the various restrictions imposed by th... 详细信息

关键词： prime ring involution commutativity derivation generalized derivation

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Enhancing asphaltene precipitation modeling by cubic-PR solid model using thermodynamic correlations and averaging techniques

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Petroleum Science 2020年第1期17卷 232-241页

作者： Aktham E.Shoukry Ahmed h.el-Banbi helmy Sayyouh Petroleum Engineering University of WyomingLaramieWYUSA Petroleum Department Faculty of EngineeringCairo UniversityGizaEgypt Petroleum Engineering American University in Cairo(AUC)GizaEgypt

Cubic equation-of-state solid models are one of the most widely used models to predict asphaltene precipitation *** parameters are needed to model precipitation under different pressures and temperatures and are usually obtained through tuning with multi asphaltene onset *** the purpose of enhancing the cubic Peng–Robinson solid model and reducing its dependency on asphaltene experiments,this paper tests the use of aromatics and waxes correlations to obtain these thermodynamic *** addition,weighted averages between both correlations are *** averaging is based on reported saturates,aromatics,resins,asphaltene(SARA)fractions,and wax *** the methods are tested on four oil samples,with previously published data,covering precipitation and onset *** proposed wax-asphaltene average showed the best match with experimental data,followed by a SARA-weighted *** new addition enhances the model predictability and agrees with the general molecular structure of asphaltene molecules.

关键词： Asphaltene precipitation Asphaltene onset pressure Asphaltene precipitation modeling Asphaltene thermodynamics Cubic equation of state

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Spirulina platensis extract improves the production and defenses of the common bean grown in a heavy metals-contaminated saline soil

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Journal of Environmental Sciences 2023年第7期129卷 240-257页

作者： Mostafa M.Rady Ahmed S.elrys Eman Selem Ahmed A.A.Mohsen Safaa M.A.I.Arnaout Ahmed h.el-Sappah khaled A.el-Tarabily el-Sayed M.Desoky Botany Department Faculty of AgricultureFayoum UniversityFayoum 63514Egypt College of Tropical Crops Hainan UniversityHaikou 570228China Soil Science Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Botany and Microbiology Department Faculty of ScienceZagazig UniversityZagazig 44511Egypt horticulture Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Botany Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Genetics Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Department of Biology College of ScienceUnited Arab Emirates UniversityAl-Ain 15551United Arab Emirates Khalifa Center for Genetic Engineering and Biotechnology United Arab Emirates UniversityAl-Ain 15551United Arab Emirates harry Butler Institute Murdoch UniversityMurdoch 6150Australia

Plants have to cope with several abiotic stresses,including salinity and heavymetals(hMs).Under these stresses,several extracts have been used as effective natural biostimulants,however,the use of Spirulina platensis(SP)extract(SPE)remains *** effects of SPE were evaluated as soil addition(SA)and/or foliar spraying(FS)on antioxidant defenses and hMs content of common bean grown in saline soil contaminated with ***(40 or 80 mg SPE/hill added as SA or 20 or 40 mg SPE/plant added as FS)or integrative(SA+FS)applications of SPE showed significant improvements in the following order:SA-80+FS-40>SA-80+FS-20>SA-40+FS-40>SA-40+FS-20>SA-80>SA-40>FS-40>FS-20>***,the integrative SA+FS with 40 mg SP/plant was the most effective treatment in increasing plant growth and production,overcoming stress effects and minimizing contamination of the edible *** significantly increased plant growth(74%–185%)and yield(107%–227%)by enhancing net photosynthetic rate(78.5%),stomatal conductance(104%),transpiration rate(124%),and contents of carotenoids(60.0%),chlorophylls(49%–51%),and NPK(271%–366%).These results were concurrent with the marked reductions in malondialdehyde(61.6%),hydrogen peroxide(42.2%),nickel(91%–94%),lead(80%–9%),and cadmium(74%–91%)contents due to the improved contents of glutathione(87.1%),ascorbate(37.0%),andα-tocopherol(77.2%),and the activities of catalase(18.1%),ascorbate peroxidase(18.3%),superoxide dismutase(192%),and glutathione reductase(52.2%)as reinforcing ***,this most effective treatment is recommended to mitigate the stress effects of salinity and hMs on common bean production while minimizing hMs in the edible part.

关键词： Antioxidant defense system Biostimulants heavy metals Microalgae extracts Saline soil Soil pollution

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Micro-fabrication of ceramics:Additive manufacturing and conventional technologies

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Journal of Advanced Ceramics 2021年第1期10卷 1-27页

作者： hany hASSANIN Khamis ESSA Amr elShAER Mohamed IMBABY heba h.el-MONGY Tamer A.el-SAYED School of Engineering Canterbury Christ Church UniversityCanterburyCT11QUUK University of Birmingham EdgbastonB152TTUK Kingston University London Penrhyn RoadKingston Upon ThamesSurreyKT12EEUK Department of Mechanical Design Faculty of EngineeringMatariaHelwan UniversityP.O.Box.11718CairoEgypt Jubail University College Mechanical EngineeringKingdom of Saudi Arabia Center for Applied Dynamics Research(CADR) School of EngineeringUniversity of AberdeenAberdeenAB243UEUK

Ceramic materials are increasingly used in micro-electro-mechanical systems(MEMS)as they offer many advantages such as high-temperature resistance,high wear resistance,low density,and favourable mechanical and chemical properties at elevated ***,with the emerging of additive manufacturing,the use of ceramics for functional and structural MEMS raises new opportunities and *** paper provides an extensive review of the manufacturing processes used for ceramic-based MEMS,including additive and conventional manufacturing *** review covers the micro-fabrication techniques of ceramics with the focus on their operating principles,main features,and processed *** that need to be addressed in applying additive technologies in MEMS include ceramic printing on wafers,post-processing at the micro-level,resolution,and quality *** paper also sheds light on the new possibilities of ceramic additive micro-fabrication and their potential applications,which indicates a promising future.

关键词： micro-electro-mechanical system(MEMS) micro-fabrication ceramics micro parts additive manufacturing

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A NOTE ON CONTINUATION AND BOUNDEDNESS OF SOLUTIONS OF A NONLINEAR DIFFERENTIAL EQUATION

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Acta Mathematica Scientia 1984年第3期4卷 259-264页

作者： h.el-OW AIDY,A.S.ZAGROUT Math. Dept. Faculty of Science King Abdul Aziz University Jaddah SAUDI ARABIA Math. Dept. Faculty of Science King Abdul Aziz University Jaddah SAUDI ARABIA

A nonlinear second order differential equation is considered. Sufficient conditions for all solutions to be continuable and bounded to the right of an initial value t0≥0 are given.

关键词： A NOTE ON CONTINUATION AND BOUNDEDNESS OF SOLUTIONS OF A NONLINEAR DIFFERENTIAL EQUATION

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Numerical Study of Greenhouse Nocturnal heat Losses

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Journal of Thermal Science 2011年第4期20卷 377-384页

作者： F.Berroug E.K.Lakhal M.el Omari M.Faraji h.el Qarnia Laboratoire d'Automatique de l'Environnement et Procédés de Transfert UniversitéCadi AyyadFacultédes Sciences Semlalia-Département de PhysiqueMarrakech-MarocAffiliéau CNRSTURAC 28 Laboratoire de Physique des Materiaux MicroelectroniqueAutomatique et TechniqueDepartement de PhysiquesFaculte des Sciences Ain ChockUniversite Hassan IICasablanca-Maroc

In this study we quantify and analyze different components of nocturnal losses from a heated greenhouse with the presence of vegetation for typical winter weather conditions in Marrakesh-Morocco,using a non linear model,based on the greenhouse heat and mass *** was found that 12% of the total input heat was dissipate as a sensible and latent leakage losses,66% was lost by convective exchange through air-inner *** gain of energy at the inner-cover is dissipated at the outer-cover by radiation(66%)and convection(34%).This results point toward some practical measures to reduce heat losses:increasing air tightness,using covering materials with low-emissivity in the long wave band or putting up an external thermal curtain should provide significant energy savings.

关键词： Greenhouse energy balance heat losses numerical analysis.

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