Publications

Export 160 results:
Sort by: Author Title Type [ Year  (Desc)]
2020
Anis, B., H. El Fllah, T. Ismail, W. M. Fathallah, A. S. G. Khalil, O. M. Hemeda, and Y. A. Badr, "Preparation, characterization, and thermal conductivity of polyvinyl-formaldehyde/MWCNTs foam: A low cost heat sink substrate", Journal of Materials Research and Technology, vol. 9, issue 3, pp. 2934–2945, 2020.
Gad, S., M. Fathy, Y. Badr, and A. E. - H. B. Kashyout, "Pulsed Laser Deposition of In0.1Ga0.9N Nanoshapes by Nd:YAG Technique ", Coatings, vol. 10,, 2020.
2019
Salem, D. S., S. A. Shoman, and Y. Badr, "Laser-triggered release of drug encapsulated in chitosan nanoparticles for therapy of hepatocellular carcinoma ", Progress in biomedical optics and imaging-SPIE, 2019.
Bassiouni, M., T. ismai, H. Selmy, and Y. Badr, "Optical frequency comb generation by interfering multiple lasers in mach-zehnder modulator", Int. Con.Transparent optical networks, 2019.
AbdelAziem, A., K. M. El-Katib, M. A. Hafez, and Y. Badr, "Effect of annealing on La0.8Sr0.2MnO3 thin films prepared by pulsed laser deposition", Spectrochimic a Acta- Part A:Molecular and biomolecular spectroscopy, 2019.
Abdelsalam, E. M., Y. A. Attia, H. E. Hassan, and Y. Badr, "Effect of laser irradiation and Ni nanoparticles on biogasproductionfrom Anaerobic Digestion of Slurry", Waste and Biomass Valorization, 2019.
Ateia, E. E., D. N. Ghaffar, Y. Badr, and N. Fangary, "Nd:YAG laser irradiation effect on the physical properties of cobalt ferrite nanoparticles", Appl. Phys. A:Materials Sci. Process., 2019.
Ateia, E. E., D. N. Ghaffar, Y. Badr, and N. Fangary, "Nd:YAG laser irradiation effect on the physical properties of cobalt ferrite nanoparticles", Appl. Phys. A:Materials Sci. Process., 2019.
Ghanem, M. G., Y. Badr, W. H. A. T. A. Hameed, and L. K. Battisha, "Synthesis and characterization of undoped and Er-doped ZnO nanostructure thin films deposited by sol-gel spin coating technique", Material research express, 2019.
Kashyout, A. B., M. Fathy, S. Gad, and B. A. A. Y. Badr, "Synthesis of nanostructure InxGal-xN bulk alloys and thin films for LED devices", Photonics, 2019.
2017
Abdelsalam, E., M. Samer, Y. A. Attia, M. A. Abdel-Hadi, H. E. Hassan, and Y. Badr, "Effects of Co and Ni nanoparticles on biogas and methane production from anaerobic digestion of slurry", Energy Conversion and Management, vol. 141, pp. 108-119, 2017. AbstractWebsite
n/a
Abdelsalam, E., M. Samer, Y. A. Attia, M. A. Abdel-Hadi, H. E. Hassan, and Y. Badr, "Influence of zero valent iron nanoparticles and magnetic iron oxide nanoparticles on biogas and methane production from anaerobic digestion of manure", Energy, vol. 120, pp. 842-853, 2017. AbstractWebsite
n/a
Tharwat, C., M. A. Swillam, Y. Badr, S. M. Ahmed, I. K. Bishay, F. A. Sadallah, and E. A. ElSaid, "Novel optical technique for 2D graphene reduction", Proceedings of SPIE - The International Society for Optical Engineering, vol. 10100, 2017. Abstract
n/a
Soliman, W., S. El-Ansary, and Y. Badr, "Optical characterization of one-step synthesis of ternary nanoalloy by laser ablation of stainless steel target in Hexane", Optics and Laser Technology, vol. 97, pp. 41-45, 2017. AbstractWebsite
n/a
Adel, D., A. A. M. Ward, N. Lotfy, A. Nassar, S. L. Abd-El-Messieh, M. A. Hafez, and Y. A. Badr, "PMMA nanocomposites based on laser fragmented Fe3O4nanoparticles", KGK Kautschuk Gummi Kunststoffe, vol. 70, no. 9, pp. 32-38, 2017. AbstractWebsite
n/a
Hegazy, S. F., Y. A. Badr, and S. S. A. Obayya, "Relative-phase and time-delay maps all over the emission cone of hyperentangled photon source", Optical Engineering, vol. 56, no. 2, 2017. AbstractWebsite
n/a
2016
Hegazy, S. F., J. El-Azab, Y. A. Badr, and S. S. A. Obayya, "Accurate relative-phase and time-delay maps all over the emission cone of hyperentangled photon source", Proceedings of SPIE - The International Society for Optical Engineering, vol. 9894, 2016. Abstract
n/a
Abdelsalam, E., M. Samer, Y. A. Attia, M. A. Abdel-Hadi, H. E. Hassan, and Y. Badr, "Comparison of nanoparticles effects on biogas and methane production from anaerobic digestion of cattle dung slurry", Renewable Energy, vol. 87, pp. 592-598, 2016. AbstractWebsite
n/a
Badr, Y. A., M. I. Youssif, T. El-Sherbini, and D. Hassan, "Fabrication and characterization of superconducting nano layer by pulsed laser deposition", Life Science Journal, vol. 13, no. 5, pp. 8-20, 2016. AbstractWebsite
n/a
Afifi, G., M. A. Khedr, Y. Badr, M. Danailov, P. Sigalotti, P. Cinquegrana, M. B. Alsous, and A. R. Galaly, "Timing stability enhancement of an Erbium Doped mode locked Fiber Laser using SESAM mirror", Optical Fiber Technology, vol. 29, pp. 74-83, 2016. AbstractWebsite
n/a
2015
Moghadam, H. S., M. Khademi, Z. Hu, R. J. Stern, J. F. Santos, and Y. Wu, "Cadomian (Ediacaran–Cambrian) arc magmatism in the ChahJam–Biarjmand metamorphic complex (Iran): Magmatism along the northern active margin of Gondwana", Gondwana Research, vol. 27, no. 1, pp. 439 - 452, 2015. AbstractWebsite

Abstract The ChahJam–Biarjmand complex (CJBC), flanked by the Alborz Mountains in the north and the Lut–Tabas block to the south, is part of Central Iranian block, where the oldest continental crust of Iran is found. This complex contains granitic to tonalitic orthogneissic rocks (old plutons) and associated metasediments, amphibolites and paragneisses. Metamorphosed granitic and granodioritic dikes intrude orthogneisses as well as metasediments and are abundant close to the plutons (orthogneissic rocks). Based on the results of bulk rock trace and rare earth elements, the orthogneissic rocks are inferred to have crystallized from subduction-related melts. Amphibolites also have subduction-related signatures and are inferred to have formed both as metamorphosed volcanoclastic sediments and as attenuated basic dikes. The presence of para-amphibolites associated with paragneisses and metasediments (mica schists) could represent a sedimentary basin filled with magmatic arc erosional products. U–Pb zircon dating of the ChahJam–Biarjmand rocks yielded 238U/206Pb crystallization ages of ca. 550 to 530 Ma (Ediacaran–early Cambrian). Sr–Nd isotope systematics on whole rocks (εNd(t) = − 2.2 to − 5.5) and zircon Hf isotope results indicate that \{CJBC\} Cadomian granitic rocks contain older, possible Mesoproterozoic, continental crust in their source. The ChahJam–Biarjmand granitic–tonalitic gneissic rocks are coeval with other similar-aged metagranites and gneisses within Iranian basement exposed in Central Iran, the Sanandaj–Sirjan Zone and the Alborz Mountains, as well as in the Tauride–Anatolide platform in western Anatolia and in \{NW\} Turkey. All these dispersed Cadomian basement rocks are interpreted to show fragments of Neoproterozoic–early Cambrian continental arcs bordering the northern active margin of Gondwana.

Moghadam, H. S., M. Khademi, Z. Hu, R. J. Stern, J. F. Santos, and Y. Wu, "Cadomian (Ediacaran–Cambrian) arc magmatism in the ChahJam–Biarjmand metamorphic complex (Iran): Magmatism along the northern active margin of Gondwana", Gondwana Research, vol. 27, no. 1, pp. 439 - 452, 2015. AbstractWebsite

Abstract The ChahJam–Biarjmand complex (CJBC), flanked by the Alborz Mountains in the north and the Lut–Tabas block to the south, is part of Central Iranian block, where the oldest continental crust of Iran is found. This complex contains granitic to tonalitic orthogneissic rocks (old plutons) and associated metasediments, amphibolites and paragneisses. Metamorphosed granitic and granodioritic dikes intrude orthogneisses as well as metasediments and are abundant close to the plutons (orthogneissic rocks). Based on the results of bulk rock trace and rare earth elements, the orthogneissic rocks are inferred to have crystallized from subduction-related melts. Amphibolites also have subduction-related signatures and are inferred to have formed both as metamorphosed volcanoclastic sediments and as attenuated basic dikes. The presence of para-amphibolites associated with paragneisses and metasediments (mica schists) could represent a sedimentary basin filled with magmatic arc erosional products. U–Pb zircon dating of the ChahJam–Biarjmand rocks yielded 238U/206Pb crystallization ages of ca. 550 to 530 Ma (Ediacaran–early Cambrian). Sr–Nd isotope systematics on whole rocks (εNd(t) = − 2.2 to − 5.5) and zircon Hf isotope results indicate that \{CJBC\} Cadomian granitic rocks contain older, possible Mesoproterozoic, continental crust in their source. The ChahJam–Biarjmand granitic–tonalitic gneissic rocks are coeval with other similar-aged metagranites and gneisses within Iranian basement exposed in Central Iran, the Sanandaj–Sirjan Zone and the Alborz Mountains, as well as in the Tauride–Anatolide platform in western Anatolia and in \{NW\} Turkey. All these dispersed Cadomian basement rocks are interpreted to show fragments of Neoproterozoic–early Cambrian continental arcs bordering the northern active margin of Gondwana.

Prieto-Blanco, M. C., N. Jornet-Martínez, Y. Moliner-Martínez, C. Molins-Legua, R. Herráez-Hernández, V. J. Andrés, and P. Campins-Falcó, "Development of a polydimethylsiloxane–thymol/nitroprusside composite based sensor involving thymol derivatization for ammonium monitoring in water samples", Science of The Total Environment, vol. 503–504, pp. 105 - 112, 2015. AbstractWebsite

Abstract This report describes a polydimethylsiloxane (PDMS)-thymol/nitroprusside delivery composite sensor for direct monitoring of ammonium in environmental water samples. The sensor is based on a \{PDMS\} support that contains the Berthelot's reaction reagents. To prepare the PDMS–thymol/nitroprusside composite discs, thymol and nitroprusside have been encapsulated in the \{PDMS\} matrix, forming a reagent release support which significantly simplifies the analytical measurements, since it avoids the need to prepare derivatizing reagents and sample handling is reduced to the sampling step. When, the PDMS–thymol/nitroprusside composite was introduced in water samples spontaneous release of the chromophore and catalyst was produced, and the derivatization reaction took place to form the indothymol blue. Thus, qualitative analysis of NH4+ could be carried out by visual inspection, but also, it can be quantified by measuring the absorbance at 690 nm. These portable devices provided good sensitivity (LOD < 0.4 mg L− 1) and reproducibility (RSD < 10%) for the rapid detection of ammonium. The PDMS–NH4+ sensor has been successfully applied to determine ammonium in water samples and in the aqueous extracts of particulate matter \{PM10\} samples. Moreover, the reliability of the method for qualitative analysis has been demonstrated. Finally, the advantages of the PDMS–NH4+ sensor have been examined by comparing some analytical and complementary characteristics with the properties of well-established ammonium determination methods.

Elzanfaly, E. S., S. A. Hassan, M. Y. Salem, and B. A. El-Zeany, "Different signal processing techniques of ratio spectra for spectrophotometric resolution of binary mixture of bisoprolol and hydrochlorothiazide; a comparative study", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 140, pp. 334 - 343, 2015. AbstractWebsite

Abstract Five signal processing techniques were applied to ratio spectra for quantitative determination of bisoprolol (BIS) and hydrochlorothiazide (HCT) in their binary mixture. The proposed techniques are Numerical Differentiation of Ratio Spectra (ND-RS), Savitsky–Golay of Ratio Spectra (SG-RS), Continuous Wavelet Transform of Ratio Spectra (CWT-RS), Mean Centering of Ratio Spectra (MC-RS) and Discrete Fourier Transform of Ratio Spectra (DFT-RS). The linearity of the proposed methods was investigated in the range of 2–40 and 1–22 μg/mL for \{BIS\} and HCT, respectively. The proposed methods were applied successfully for the determination of the drugs in laboratory prepared mixtures and in commercial pharmaceutical preparations and standard deviation was less than 1.5. The five signal processing techniques were compared to each other and validated according to the İCH\} guidelines and accuracy, precision, repeatability and robustness were found to be within the acceptable limit.

Morimoto, Y., D. He, W. Hijikata, T. Shinshi, T. Nakai, and N. Nakamura, "Effect of high-frequency orbital and vertical oscillations of the laser focus position on the quality of the cut surface in a thick plate by laser beam machining", Precision Engineering, vol. 40, pp. 112 - 123, 2015. AbstractWebsite

Abstract In laser beam machining with oxygen gas, striations are formed on the cut surface due to the cyclic oxidization reaction, which is affected by the cutting conditions and the thermal properties of the workpiece. The formation of striations causes an increase in surface roughness. In order to reduce the surface roughness, we propose controlling the formation of striations by utilizing multi-DOF oscillation of the focus position of the laser. In this paper, we construct a laser machining system in which positioning control of the focus position is achieved by driving the focal lens. The effect of orbital oscillation of the laser focus position parallel to the top surface of the workpiece and vertical oscillation perpendicular to this surface on the formation of striations was evaluated by performing laser cutting tests on thick mild steel plates. The experimental results show that control of the formation of striations can be realized by choosing the appropriate oscillation conditions. The surface roughness with oscillation was less than half that without oscillation.