American Journal of Physics and Applications

Volume 9, Issue 1, January 2021

  • Measurements on Solar Energy Resources in the Mt. Everest Region

    Norsang Gelsor, Liu Juan, Tsoja Wangmo, Lagba Tunzhup, Nuozhen Gelsor

    Issue: Volume 9, Issue 1, January 2021
    Pages: 1-9
    Received: Dec. 17, 2020
    Accepted: Jan. 05, 2021
    Published: Jan. 15, 2021
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    Abstract: Research on solar radiation in the Mt. Everest region provides great interests for the strategies of solar energy utilization, climate change and environmental sustainability etc. We present measurement results of global horizontal irradiance, solar spectral irradiance and solar UV irradiance performed with the Dutch CMP11 Pyranometers, the German ... Show More
  • Some Notes on the Proof of Entropy Increase in the Thermalization of Two Blocks

    Li Pinjun

    Issue: Volume 9, Issue 1, January 2021
    Pages: 10-14
    Received: Oct. 14, 2020
    Accepted: Nov. 05, 2020
    Published: Jan. 22, 2021
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    Abstract: The thermalization of two blocks with different initial temperatures in an insulated recipient is an irreversible process, so the entropy of the system will increase during this process. Lima (Eur. J. Phys. 36 (2015) 068001) has given an elegant and concise proof for that which had been proved by Mungan (Eur. J. Phys. 36 (2015) 048004) with a compl... Show More
  • A Scaled Effective Medium Theory for Calculation of Resonant and Relaxation Frequency in Magnetic Composites

    Ricky Lamar Moore

    Issue: Volume 9, Issue 1, January 2021
    Pages: 15-24
    Received: Dec. 06, 2020
    Accepted: Dec. 14, 2020
    Published: Jan. 22, 2021
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    Abstract: Scaled Effective Medium Theory (ScEMT) is applied to predict magnetic resonant and relaxation frequency in polymer-magnetic particle composites with favorable comparison to measured data. A single scaling function is identified that uses magnetic particulate resonant and relaxation frequencies, or magnetization and anisotropy field, volume fraction... Show More
  • A GSM Based Intelligent Solar Energy Measuring System

    Salami Olugbenga, Green Oluwole

    Issue: Volume 9, Issue 1, January 2021
    Pages: 25-28
    Received: Jan. 06, 2021
    Accepted: Feb. 14, 2021
    Published: Mar. 17, 2021
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    Abstract: A Photovoltaic (PV) power monitoring is important in PV systems for proper generation and transmission. With the need to monitor certain parameters like voltage, current and power in order to ascertain the power output of a solar system. In this project design, a GSM solar power monitoring system is designed in order to monitor the voltage, current... Show More