American Journal of Modern Physics

Archive

Volume 7, Issue 2, March 2018

  • Energy Performance Evaluation for Three Selected Common Commercial Vehicles Based on Fuel Economy

    Hayatu Abba Ibrahim, Nura Yakubu

    Issue: Volume 7, Issue 2, March 2018
    Pages: 62-67
    Received: 3 November 2017
    Accepted: 30 November 2017
    Published: 17 January 2018
    DOI: 10.11648/j.ajmp.20180702.11
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    Abstract: This work is on measurement of automobile performance on Nigerian roads using the method of fuel economy. The current located area is the road linking Maiduguri city to Bama town all in Bono State, Nigeria. The emphasis is made on performance of automobile in relation to fuel consumption with fuel economy. Road safety enhancement is also highlighte... Show More
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  • Review of Ultrafast Demagnetization After Femtosecond Laser Pulses: A Complex Interaction of Light with Quantum Matter

    Manfred Fähnle, Michael Haag, Christian Illg, Benedikt Mueller, Weikai Weng, Theodoros Tsatsoulis, Haonan Huang, Johan Briones, Nicolas Teeny, Lifa Zhang, Tilmann Kuhn

    Issue: Volume 7, Issue 2, March 2018
    Pages: 68-74
    Received: 27 December 2017
    Accepted: 9 January 2018
    Published: 18 January 2018
    DOI: 10.11648/j.ajmp.20180702.12
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    Abstract: When a magnetic film is excited by a femtosecond laser pulse, either with THz or with optical frequencies, then there is at least a partial demagnetization within a few hundred femtoseconds, followed by a remagnetization to the original state on a bit longer time scale. This phenomenon is caused by a complex interaction of light with quantum matter... Show More
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  • Geometrical and Experimental Conditions for the Homogeneous and Inhomogeneous Flows of the Polyethylene Oxide Solution in the Cylinder of Couette

    Ngargoto Ngarmoundou, El Hadji Oumar Gueye, Mahamat Barka, Aboubaker Chedikh Beye

    Issue: Volume 7, Issue 2, March 2018
    Pages: 75-86
    Received: 9 January 2018
    Accepted: 19 January 2018
    Published: 23 February 2018
    DOI: 10.11648/j.ajmp.20180702.13
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    Abstract: A simple method for characterizing the flow curve of a polymer solution (PEO) in shear in Couette geometry is developed. It consists in considering a priori the fluid in Newtonian flow with the assumptions related to the influence of the rheological and geometrical parameters, then to evaluate the shearing speed characteristic of this partially and... Show More
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  • Multi-Physics Mathematical Model of Weakly-Ionized Plasma Flows

    Osama Ahmed Marzouk

    Issue: Volume 7, Issue 2, March 2018
    Pages: 87-102
    Received: 28 January 2018
    Accepted: 8 February 2018
    Published: 5 March 2018
    DOI: 10.11648/j.ajmp.20180702.14
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    Abstract: This work presents a multidisciplinary mathematical model, as a set of coupled governing equations and auxiliary relations describing the fluid-flow, thermal, and electric fields of partially-ionized plasma with low magnetic Reynolds numbers. The model is generic enough to handle three-dimensionality, Hall effect, compressibility, and variability o... Show More
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