American Journal of Physics and Applications

Volume 2, Issue 6, November 2014

  • Development and Optimization of Laser-Induced Breakdown Spectroscopy (LIBS) for Quantification of Carbon in Steel within UV/Visible Region

    Mohamed A. Khater, Mohammed M. Babatin, Ali M. Eid, Abdulaziz S. Alaamer

    Issue: Volume 2, Issue 6, November 2014
    Pages: 113-117
    Received: Oct. 26, 2014
    Accepted: Nov. 04, 2014
    Published: Nov. 10, 2014
    DOI: 10.11648/j.ajpa.20140206.11
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    Abstract: A simple bench-top laser-induced breakdown spectroscopy (LIBS) technique is investigated for the rapid detection of sufficient amount of the light element carbon. The plasma investigated was generated by focusing the fundamental radiation at 1064 nm of Nd:YAG laser onto low alloy steel target. The radiation emitted from the plasma was dispersed and... Show More
  • The Ball of Lightning Structure and Creation

    Abdalla A. Jaber

    Issue: Volume 2, Issue 6, November 2014
    Pages: 118-120
    Received: Oct. 08, 2014
    Accepted: Nov. 28, 2014
    Published: Dec. 02, 2014
    DOI: 10.11648/j.ajpa.20140206.12
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    Abstract: By studying a drop of water reaction and behavior on a hot surface while gradually increasing the surface temperature, and by making more experiments on the Leidenfrost Effect, the author explained the ball lightning structure and its dynamic release of energy through one single system of physics. The dynamic action starts when a drop of water is e... Show More
  • Travelling Waves Solution of the Unsteady Problem of Binary Gas Mixture Affected by a Nonlinear Thermal Radiation Field

    Taha Zakaraia Abdel Wahid

    Issue: Volume 2, Issue 6, November 2014
    Pages: 121-134
    Received: Nov. 10, 2014
    Accepted: Nov. 26, 2014
    Published: Dec. 05, 2014
    DOI: 10.11648/j.ajpa.20140206.13
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    Abstract: In the present study, a development of the paper [Can. J. of Phy., 2012, 90(2): 137-149] is introduced. The non-stationary BGK (Bhatnager- Gross- Krook) model of the Boltzmann nonlinear partial differential equations for a rarefied gas mixture affected by nonlinear thermal radiation field, for the first time, are solved instead of the stationary eq... Show More
  • Acoustical Phonons Transport through a Stepped Quantum Wire

    Mohammed Saïd Rabia

    Issue: Volume 2, Issue 6, November 2014
    Pages: 135-144
    Received: Nov. 29, 2014
    Accepted: Dec. 04, 2014
    Published: Dec. 16, 2014
    DOI: 10.11648/j.ajpa.20140206.14
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    Abstract: This work presents a theoretical approach for the study of phonon dynamics and scattering properties of an infinite linear atomic chain perturbed by a mono atomic step. The coherent transmittance scattering cross-sections for incident phonons on the atomic waveguide structure are calculated using the Landauer-Buttiker electron scattering descriptio... Show More
  • Comparison of Some Human Tissues and Some Commonly Used Thermoluminescent Dosimeters for Photon Energy Absorption

    Adem Un, Mümine Un, Ibrahim Han

    Issue: Volume 2, Issue 6, November 2014
    Pages: 145-149
    Received: Nov. 30, 2014
    Accepted: Dec. 05, 2014
    Published: Dec. 16, 2014
    DOI: 10.11648/j.ajpa.20140206.15
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    Abstract: Mass energy absorption coefficients and effective atomic numbers for photon energy absorption, ZPEAeff have been calculated in the energy range from 1 keV to 20 MeV for human tissues, Adipose Tissue, Blood Whole, Bone Cortical, Brain Grey/White Matter, Breast Tissue, Eye Lens, Lung Tissue, Muscle Skeletal, Ovary, Testis, Soft Tissue. Mass energy ab... Show More
  • Methods for Determination of the Optical Constants of the Substance BiTe-BiSe

    Gurban Axmedov

    Issue: Volume 2, Issue 6, November 2014
    Pages: 150-155
    Received: Nov. 29, 2014
    Accepted: Dec. 15, 2014
    Published: Dec. 22, 2014
    DOI: 10.11648/j.ajpa.20140206.16
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    Abstract: On the basis of the interference fringes in the transparency and reflection spectra of the free film or a film on the substrate when the substrate and the film material does not absorb light, can be determined by one of the optical constants of the material at a blank principal refractive index, if the film thickness is known.
  • ZnRE (RE=La and Ce) Intermetallics: A First-Principles Investigation

    Afroj Ahmed Khan, Vipul Srivastava, Mathrubutham Rajagopalan, Sankar Prasad Sanyal

    Issue: Volume 2, Issue 6, November 2014
    Pages: 156-161
    Received: Nov. 29, 2014
    Accepted: Dec. 22, 2014
    Published: Dec. 31, 2014
    DOI: 10.11648/j.ajpa.20140206.17
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    Abstract: ZnRE (RE= La and Ce) intermetallics were investigated with respect to their electronic properties using first principles tight binding linear muffin tin orbital method. Electronic band structures, partial and total densities of states have been derived. The band structures show metallic character; the conductivity is mostly governed by Zn-3d and RE... Show More
  • Optical Band Gap and Physical Properties of Nd3+ Doped Cadmium Borate Glasses

    Yogesh Kumar Sharma, Rajendra Prasad Joshi, Priyanka Goyal

    Issue: Volume 2, Issue 6, November 2014
    Pages: 162-166
    Received: Dec. 06, 2014
    Accepted: Dec. 23, 2014
    Published: Jan. 06, 2015
    DOI: 10.11648/j.ajpa.20140206.18
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    Abstract: Nd3+- doped cadmium borate glasses were prepared and characterized optically. The oscillator strengths and Judd-Ofelt parameters for the glass containing 0.1, 0.3 and 0.5 wt% of Nd2¬O3 were computed. Density, refractive index and optical absorption spectra were measured. The values of Judd- Ofelt parameters suggested an increase in the degree of as... Show More