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Wyszukujesz frazę "Sayed, H." wg kryterium: Autor

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    Wyświetlanie 1-11 z 11
    Tytuł:
    A coupled system of fractional order integral equations in reflexive Banach spaces
    Autorzy:
    El-Sayed, A.M.A.
    Hashem, H.H.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/963436.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Tematy:
    Weak solution
    Pettis-integral of fractional order integration
    Coupled system
    Opis:
    We present an existence theorem for at least one weak solution for a coupled system of integral equations of fractional order in reflexive Banach spaces relative to the weak topology.
    Źródło:
    Commentationes Mathematicae; 2012, 52, 1
    0373-8299
    Pojawia się w:
    Commentationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A preliminary study on some Chlorella spp. for biodiesel production
    Autorzy:
    Mohammady, N.G.-E.
    El-Sayed, H.S.
    El-Kassas, H.Y.
    Elsherbiny, B.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/80100.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biodiesel production
    Chlorella
    fatty acid
    growth
    lipid
    oil
    esterification
    fatty acid methyl ester
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 4
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristic attributes of the peanut [Arachis hypogaea L.] for its separation
    Autorzy:
    El-Sayed, A.S.
    Yahaya, R.
    Wacker, P.
    Kutzbach, H.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/26580.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    aerodynamic property
    Arachis hypogaea
    peanut
    physical property
    terminal velocity
    separation
    Źródło:
    International Agrophysics; 2001, 15, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer simulation and modeling of solar energy based on photonic band gap materials
    Autorzy:
    Aly, A. H.
    Sayed, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/174792.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    photovoltaic
    thermal energy
    renewable energy
    photonic crystals
    anti-reflection coating
    Opis:
    In this paper, we have obtained theoretically a convenient way to improve the tandem solar cell efficiency by using one-dimensional binary photonic crystals in the anti-reflection coating and intermediate reflective layer. Also, we design and simulate our structure by using two different methods; MATLAB program based on a transfer matrix method and COMSOL Multiphysics software based on a finite element method. We have obtained the localization of the photons energy on the appropriate cell and then reduced the energy losses by controlling the photonic band gap. The present design is more convenient for cold countries.
    Źródło:
    Optica Applicata; 2018, 48, 1; 117-126
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of polymers on the grinding and rheology of ultrafine Egyptian calcium carbonate suspension
    Autorzy:
    Mourad, Sabreen H
    Khalil, Mostafa M. H.
    Abdel-Khalek, N. A.
    Abdel-Khalek, M. A.
    Selim, K. A.
    Hassan, El-Sayed R. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175428.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fillers
    calcium carbonate
    ultra-fine grinding
    surface modifications
    Mechano-chemical
    activation
    polymers
    Opis:
    The investigation of surface modification of Egyptian calcium carbonate via polymers was achieved with simultaneous ultra-fine grinding. Attrition mill and planetary mill were used for wet and dry grinding, respectively. The parameters affecting the grinding were studied such as ball number, speed and grinding time. The rheological characteristics of the aqueous calcium carbonate suspensions were studied in the presence of different types of polymers. The results indicated that the mechanical force could clearly affect the modification characteristics of calcium carbonate due to its mechanochemical effects. The viscosity of calcium carbonate suspension depends on the volume percentage or weight percentage. The dispersing agent increases the solid concentration for a given particle fineness.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 152163
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrable solutions for quadratic Hammerstein and quadratic Urysohn functional integral equations
    Autorzy:
    El-Sayed, A.M.A
    Hashem, H.H.G
    Powiązania:
    https://bibliotekanauki.pl/articles/745817.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Tematy:
    Quadratic Hammerstein and Urysohn functional integral equations
    Positive monotonic solutions
    Measure of noncompactness
    Opis:
    The existence of positive monotonic solutions, in the class of continuous functions, for some nonlinear quadratic integral equation have been studied in [3], [6], [7] and [9]. Here We are concerning with the existence of \(L _1\) positive monotonic solutions for the quadratic Hammerstein and quadratic Urysohn functional integral equations.
    Źródło:
    Commentationes Mathematicae; 2008, 48, 2
    0373-8299
    Pojawia się w:
    Commentationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marker-assisted selection for scald (Rhynchosporium commune L.) resistance gene(s) in barley breeding for dry areas
    Autorzy:
    Sayed, H.
    Baum, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/65161.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    marker-assisted selection
    marker aided selection zob.marker-assisted selection
    leaf blotch
    scald zob.leaf blotch
    Rhynchosporium commune
    resistance gene
    barley
    plant breeding
    dry climate
    foliar disease
    plant disease
    fungal disease
    Opis:
    Barley scald, caused by Rhynchosporium commune is one of the most prevalent diseases in barley (Hordeum vulgare L.) worldwide. The primary loss from scald is reduced yield, which can exceed 25% in dry areas. In our earlier studies, we developed a low-resolution linkage map for recombinant inbred lines of the cross Tadmor/WI2291. Quantitative trait loci (QTLs) for scald were localized on chromosomes 2H and 3H flanked by Simple Sequence Repeat (SSR) markers HVM54 and Bmac0093b on 2H and HVLTPP8, HVM62 and Bmag0006 on 3H. These chromosome 3H markers were found to be located close to the Rrs1 − R. commune resistance gene(s) on chromosome 3H. In this study, 10 homozygous resistant and 10 homozygous susceptible plants each from the F7 population of Tadmor/ Sel160, a panel of 23 barley varieties used routinely in the International Centre for Agricultural Research in the Dry Areas (ICARDA) breeding program and three populations were used for scald resistance screening using 25 DNA markers that are located very close to scald resistance gene(s) on barley chromosomes. Only five of those markers clearly discriminated co-dominantly between resistant and susceptible plants. These markers, Ebmac0871- SSR, HVS3-SCAR, Bmag0006-SSR, reside on different arms of barley chromosome 3H. Ebmac871 is localized on the short arm of 3H and HVS3 and Bmag0006 are localized on the long arm of 3H. This result indicates that the scald resistance genes which they tag are probably close to the centromeric region of this chromosome. Scald resistance from several sources map to the proximal region of the long arm of chromosome 3H, forming the complex Rrs1 locus. The availability of highly polymorphic markers for the discrimination of breeding material would be extremely useful for barley breeders to select for the trait at the DNA level rather than relying on phenotypic expression and infection reaction.
    Źródło:
    Journal of Plant Protection Research; 2018, 58, 4
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mineralogical study and enhanced gravity separation of gold-bearing mineral, South Eastern Desert, Egypt
    Autorzy:
    El-Sayed, Samah
    Abdel-Khalek, N. A.
    El-Shatoury, E. H.
    Abdel-Motelib, A.
    Hassan, M. S.
    Abdel-Khalek, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1845207.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    gold
    mineralogy
    petrography
    gravity separation
    Falcon concentrator
    Opis:
    El-Hudi gold deposit, located in the South Eastern Desert of Egypt, represent large vein- type gold occurrence. The representative sample revealed the abundance of quartz as main constituent with minor amounts of mineral impurities. Gold was detectable (12 g/t) as determined using atomic absorption. The petrographic study revealed that the gold grains ranged from 10-40 μm. The grain boundaries of quartz are highly stained with iron minerals as hematite and limonite. Sericite mineral is common in discrete gold-bearing veins. Eroded pyrite was detected with high alteration leaving only cubic-shaped cavities behind. Different techniques for gravity separation were used to separate gold from the quartz mineral. After crushing and grinding of the sample, shaking table was used to upgrade the coarser fractions while Falcon concentrator was employed to upgrade the fine fraction. The best concentrate was obtained through grinding the whole sample to less than 0.2 mm, followed by cleaning steps. The gold content is increased from 12 to 145 g/t with total recovery of 78%.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 5; 839-848
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonincreasing solutions for quadratic integral equations of Convolution type
    Autorzy:
    El-Sayed, W. G.
    Abd El-Mowla, A. A. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/357742.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    quadratic integral equation
    measure of noncompactness
    fixed-point theorem
    monotonic solutions
    równanie całkowe
    miara braku zgodności
    twierdzenie o punkcie stałym
    rozwiązania monotoniczne
    Opis:
    We study a nonlinear quadratic integral equation of Convolution type in the Banach space of real functions defined and continuous on a bounded and closed interval. By using a suitable measure of noncompactness, we show that the integral equation has monotonic solutions.
    Źródło:
    Journal of Mathematics and Applications; 2019, 42; 95-107
    1733-6775
    2300-9926
    Pojawia się w:
    Journal of Mathematics and Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenolic compounds and antioxidant activity of rice straw extract
    Autorzy:
    Elzaawely, A.A.
    Maswada, H.F.
    El-Sayed, M.E.A.
    Ahmed, M.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/10781.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2017, 64
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Weak solutions of fractional order differential equations via Volterra-Stieltjes integral operator
    Autorzy:
    El-Sayed, A. M. A.
    El-Sayed, W. G.
    Abd El-Mowla, A. A. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/357800.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    weak solution
    mild solution
    weakly Riemann-Stieltjes integral
    function of bounded variation
    Banach space
    rozwiązanie całkowe
    całka Riemanna-Stieltjesa
    funkcja o ograniczonej zmienności
    przestrzeń Banacha
    Opis:
    The fractional derivative of the Riemann-Liouville and Caputo types played an important role in the development of the theory of fractional derivatives, integrals and for its applications in pure mathematics ([18], [21]). In this paper, we study the existence of weak solutions for fractional differential equations of Riemann-Liouville and Caputo types. We depend on converting of the mentioned equations to the form of functional integral equations of Volterra-Stieltjes type in reflexive Banach spaces.
    Źródło:
    Journal of Mathematics and Applications; 2017, 40; 85-96
    1733-6775
    2300-9926
    Pojawia się w:
    Journal of Mathematics and Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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