Applied Physics Publications

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Applied Physics Publications

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    Radiology demand and capacity: A stochastic analysis based on care pathways
    (Cogent OA, 2017-06-05) Sibanda, L.; Engel-Hills, P.; Hering, E.
    : The definition of (care) pathways, their advantages and disadvantages and the associated theories since the 1950s have been reported. Important in the definitions is that clinical care pathways are defined for a single examination process and that variances in clinical examination or clinical setting introduce variances in the clinical pathway. The objective of this study was to provide stochastic evidence necessary to establish a radiology care map that has “the right people, doing the right things, in the right order, at the right time, in the right place, with the right outcome”. Following a rigorous ethics approval process, data was collected from all consenting departments, radiographers (in their individual professional capacities) and a random sample of patients through document review, interview and observational research approaches. The outcome of the study supports blurring the scope of practice boundaries and timely execution of radiography examinations. However, there remains the need for further research to map care pathways for other radiology procedures and patients whose care is more variable and less standard.
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    General Design Procedures for Airport-Based Solar Photovoltaic Systems
    (MDPI, 2017-08-12) Anurag, Anurag; Zhang, Jiemin; Gwamuri, Jephias; Pearce, Joshua M.
    : A source of large surface areas for solar photovoltaic (PV) farms that has been largely overlooked in the 13,000 United States of America (U.S.) airports. This paper hopes to enable PV deployments in most airports by providing an approach to overcome the three primary challenges identified by the Federal Aviation Administration (FAA): (1) reflectivity and glare; (2) radar interference; and (3) physical penetration of airspace. First, these challenges and precautions that must be adhered to for safe PV projects deployment at airports are reviewed and summarized. Since one of the core concerns for PV and airport symbiosis is solar panel reflectivity, and because this data is largely estimated, a controlled experiment is conducted to determine worst-case values of front panel surface reflectivity and compare them to theoretical calculations. Then a general approach to implement solar PV systems in an airport is outlined and this approach is applied to a case study airport. The available land was found to be over 570 acres, which would generate more than 39,000% of the actual annual power demand of the existing airport. The results are discussed while considering the scaling potential of airport-based PV systems throughout the U.S.
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    On the Theoretical Foundations of the Polemical Titius-Bode Law
    (National University of Science and Technology, 2016-11-16) Nyambuya, G. G.
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    On the Theoretical Foundations of the Polemical Titius-Bode Law (Ii) Exoplanetary Systems
    (ResearchGate, 2018-06-10) Nyambuya, G. G.; Jigu, D.; Nyathi, A. N.; Dube, A.; Sibanda, B.; Musosi, G.
    Using the Solar system as our standard calibration system, we device a ‘one-size-fits-all ’ procedure to fit exoplanetary semi-major axis onto ‘quantized’ nodes relative to their central host star. The idea is to fit the exoplanet’s semi-major axis onto quantised exponential orbits using the derived exponential planetary placement law (an = R5e 5n : n = 1, 2, 3, · · · ). We herein ‘fix’ the two free parameters (R5, 5) from theory so that, one should – in general – be able to calculate from theory the expected placement of a planet given the mass (Mstar) and radius (Rstar) of the host star. Using twenty five exoplantary systems with at least four known planets, we demonstrate that one can – on a very satisfactory level, ‘fix’ the two free parameters (R5, 5), so that they depend on Mstar and Rstar. Consequently, this strongly suggests that the Titius-Bode Law – a curiosity, usually assumed to be a result of chance – may very well be a gravitational phenomenon.
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    On the Gravitomagnetic Origins of the Spiral Character of Galaxies
    (ResearchGate, 2018-05) Nyambuya, G. G.
    We here demonstrate that the proposed hitherto unknown gravitomagnetic dark-force (Nyambuya 2018) that hypothetically explains the Flat Rotation Curves of Spiral Galaxies – this same force, explains very well, the logarithmic spiral shapes of spiral galaxies. The galactic disk is here assumed to be in a state of free-fall around the central bulge with the hypothetical gravitomagnetic dark-force being the dominate force determining all gravity-related dynamics of the disk.