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  1. No Access

    Article

    The contrast of speckle images using viscous fluid flows

    We have obtained a novel formula for the contrast of speckle images considering the Voigt distribution using Fraunhofer diffraction and convolution operations. An experiment on speckle formation using fluid fl...

    Wafaa E. Ali, A. M. Hamed, H. El-Ghandoor, J. El-Azab… in The European Physical Journal Plus (2023)

  2. No Access

    Article

    Influence of Na2O addition on the alkali borochromate glasses: structure and ligand field

    Trivalent chromium is a very common ion used for coloring in the industry of glass. As glasses are melted under high oxidizing circumstances, hexavalent chromium Cr(VI) can be fixed and found in certain advert...

    A. Samir in Indian Journal of Physics (2021)

  3. No Access

    Article

    The effect of radiation on the structure and ligand field of borate glasses containing Cr ions

    A glass system of composition [(50-x) B2O3-25ZnO-25Na2O-xCr2O3], where (x = 0.0, 0.1, 0.3, 0.5 mol.%) was synthesized applying traditional melt quenching technique. The amorphous nature of the samples was proved ...

    A. I. Ismail, A. Samir, F. Ahmad, L. I. Soliman… in Optical and Quantum Electronics (2021)

  4. No Access

    Article

    Raman, FTIR studies and optical absorption of zinc borate glasses containing WO3

    Glasses with composition [xWO3–(25−x)–ZnO–20Na2O–55B2O3 where x = 0, 5, 10, 15 and 20 mol. %] were prepared by melt quenching method. The amorphous state of the current glass samples was checked by X-ray diffract...

    M. Farouk, A. Samir, A. Ibrahim, M. A. Farag, A. Solieman in Applied Physics A (2020)

  5. No Access

    Article

    Ligand field and spectroscopic investigations of cobalt doped erbium–zinc borate glasses

    The glasses of the composition [xCoO–(29.5 − x)Na2O–55B2O3–15ZnO–0.5Er2O3] (where x = 0, 0.3, 0.5, 1 and 3 mol%) have been prepared using melt quenching technique. The recorded UV/VIS/NIR absorption spectra have ...

    M. Farouk, F. Ahmad, A. Samir in Optical and Quantum Electronics (2019)

  6. No Access

    Article

    Characterization of borate glasses doped with copper oxide for optical application

    Borate glasses having the formula x CuO–(50 − x)B2O3–30Na2O–20ZnO where x = 0, 0.2, 0.5, 1, 4 and 7 mol% were investigated. The samples were prepared using the conventional melt-quenching technique. Physical prop...

    A. Samir, Moukhtar A. Hassan, A. Abokhadra… in Optical and Quantum Electronics (2019)

  7. Article

    Open Access

    37th International Symposium on Intensive Care and Emergency Medicine (part 2 of 3)

    D. Rob, R. Špunda, J. Lindner, J. Šmalcová, O. Šmíd, T. Kovárník… in Critical Care (2017)

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