American Journal of Modern Physics

Volume 7, Issue 1, January 2018

  • The Mechanical Invariance Factor in Musical Acoustics and Perception (Revisited)

    Akpan Jimmy Essien

    Issue: Volume 7, Issue 1, January 2018
    Pages: 1-13
    Received: Sep. 18, 2017
    Accepted: Oct. 08, 2017
    Published: Nov. 21, 2017
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    Abstract: Mechanical, acoustical, and neurophysiological investigations in music, acoustics, and auditory perception repose on the Pythagorean string ratio theory of musical pitch intervals (6th century B.C). Recently, the mechanical validity of the string ratio theory and its psychological import have been challenged and denied on grounds of invariance. In ... Show More
  • The Equilibrium, Kinetics and Thermodynamics of Cu2+, Zn2+, Cd2+ and Pb2+ Sorption in Sorbents with Different Functional Groups

    Abbasov Aliaddin Dayyanoglu, Mamedova Fizza Sadikhkizi

    Issue: Volume 7, Issue 1, January 2018
    Pages: 14-20
    Received: Nov. 03, 2017
    Accepted: Nov. 13, 2017
    Published: Dec. 05, 2017
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    Abstract: The equilibrium condition and kinetics of the sorption of Cu2+, Zn2+, Cd2+ and Pb2+ ions with Amberlite İRC 748 (with iminodiacetic group, Na+), Duolite C 467 (with amino-fosfon group, Na+), Dowex MAC-3 (with carboxyl group, H+) and Amberlite İR 120 (with sulpho-group, H+) cationites have been studied and thermodynamic parameters of the processes h... Show More
  • New Trend in Radiation Dosimeters

    Aya Mahmoud Hamdy Abaza

    Issue: Volume 7, Issue 1, January 2018
    Pages: 21-30
    Received: Sep. 30, 2017
    Accepted: Oct. 24, 2017
    Published: Dec. 14, 2017
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    Abstract: A radiation dosimeter is a device that measures exposure to ionizing radiation. It is used for human radiation protection as a measurement of dose in both medical and industrial processes. This study aimed to identify and highlight the new technology in the types of radiation dosimeters. The study comprises a personal selection of recent reports fr... Show More
  • Influence of the Fringe Fields in Microchannel Amplifiers Design

    Valentin Ivanov, Igor Turchanovsky

    Issue: Volume 7, Issue 1, January 2018
    Pages: 31-33
    Received: Nov. 07, 2017
    Accepted: Nov. 16, 2017
    Published: Dec. 14, 2017
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    Abstract: Description of mathematical model for the fringe fields in photo detectors based on microchannel plates (MCP) is given. Normally the fringe field calculation requires complex and time-consuming computations using three-dimensional commercial codes. The original semi-analytic model suggested in the paper. This model is based on the mapping procedure... Show More
  • Hypothetical Flora and Fauna on the Planet Venus Found by Revision of the TV Experiment Data (1975–1982)

    Leonid Ksanfomality, Arnold Selivanov, Yuryi Gektin

    Issue: Volume 7, Issue 1, January 2018
    Pages: 34-47
    Received: Oct. 11, 2017
    Accepted: Nov. 13, 2017
    Published: Jan. 11, 2018
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    Abstract: We present the results of new processing the archival telemetry data, returned from the surface of Venus by the VENERA spacecraft landers in 1975 and 1982. Reprocessing of the unique data with up-to-date techniques resulted in substantial improvement of the level of details. New analysis of the VENERA television images led to detection and identifi... Show More
  • Intensification of Heat Transfer Processes in the Low Temperature Short Heat Pipes with Laval Nozzle Formed Vapour Channel

    Arkady Vladimirovich Seryakov

    Issue: Volume 7, Issue 1, January 2018
    Pages: 48-61
    Received: Dec. 06, 2017
    Accepted: Dec. 24, 2017
    Published: Jan. 11, 2018
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    Abstract: The results of flow studies of moist vapour in Laval-liked vapour channels of short linear heat pipes (HPs) are presented. The increase in heat transfer coefficient of short linear HPs, intended for creation the cooling systems of heat-stressed designs of spacecraft is carried out by making the HPs vapour channel forms of the Laval-liked nozzle. Co... Show More