American Journal of Physics and Applications

Volume 7, Issue 2, March 2019

  • Study on the Use of Silicon Drift Detector to Get Information on Light Emitted by Luminescent Materials

    Murielle Béranger

    Issue: Volume 7, Issue 2, March 2019
    Pages: 34-42
    Received: 23 January 2019
    Accepted: 5 March 2019
    Published: 21 March 2019
    Abstract: Energy dispersive X-Ray detectors are among the most common tools installed on scanning electron microscopes and, as they are sensitive to light, they can be used to get panchromatic cathodoluminescence information. This article presents practical considerations about the parameters to choose to obtain a good cathodoluminescence signal on a silicon... Show More
  • The Realization of “College Physics” Teaching for Non-Physics Major Students

    Guiru Jia, Yuying Liu

    Issue: Volume 7, Issue 2, March 2019
    Pages: 43-47
    Received: 14 February 2019
    Accepted: 30 March 2019
    Published: 11 May 2019
    Abstract: Physics is an exciting, living, discipline that continually moves in new directions. College Physics is a very important course for scientists and engineers. According to the study of Physics teaching experience, authors believe that the goal of studying Physics for non-physics major students is the application of Physics. Using the thinking fashio... Show More
  • Discussion on the Principle and Reliability Improvement of AC Magnetic Flux Leakage Detection of Steel Rod

    Baishang Hu

    Issue: Volume 7, Issue 2, March 2019
    Pages: 48-54
    Received: 13 March 2019
    Accepted: 7 May 2019
    Published: 4 June 2019
    Abstract: In this paper, the principle of ac magnetic flux leakage (referred to as MFL) detection is presented by analyzing the formation of ac magnetic flux leakage and how it is collected. It is found that ac excitation frequency is a very important equipment parameter for ac magnetic flux leakage detection of steel rod. High-frequency current not only sta... Show More
  • Simplified Fokker-Plank Equation Treatment of Finite-temperature Spin-torque Problems

    Xia Jianbai, Wen Hongyu

    Issue: Volume 7, Issue 2, March 2019
    Pages: 55-60
    Received: 11 January 2019
    Accepted: 23 May 2019
    Published: 12 June 2019
    Abstract: A Legendre function expansion method is proposed to solve the simplified Fokker-Plank equation to study the dynamics of a macrospin under spin-torque-driven magnetic reversal at finite temperature. The first and second eigenvalues (λτ0)1 and (λτ0)2 as functions of I/Ic and Hk are obtained, in agreement with the previous results using the Taylor ser... Show More
  • Genodynamics: A New Biophysical Approach to Modeling Adaptation in Human Populations

    Tshela Elizabeth Mason, James Lindesay, Georgia Mae Dunston

    Issue: Volume 7, Issue 2, March 2019
    Pages: 61-67
    Received: 3 March 2019
    Accepted: 9 May 2019
    Published: 13 June 2019
    Abstract: Using genodynamics, the Howard University biophysics research and interdisciplinary development group transforms genomic sequence data into genomic energy measures to explore the science of genome variation in population diversity and human biology. Genodynamics utilizes the statistical distribution of single nucleotide polymorphism (SNP) data from... Show More