Crater-like landform in Bayuda desert (a processing of satellite images)

The paper is proposing a survey of a region in Sudan, the Bayuda desert, using the satellite images as obtained from Google Maps. The images reveal the ring granitic structure of the region enclosed by a bend of river Nile. To enhance the features of the landform, images are processed with a method based on fractional calculus, able to increase the rendering of edges without deteriorating the overall quality of images. Besides the ringed structure of the region, a huge crater-like structure with a diameter of 10 km is evidenced.Comment: Keywords: Satellite maps, Crater landform, Image processing, Fractional calculu

Performance assessment of classical and fractional controllers for transient operation of gas turbine engines

The nonlinear behaviour of gas turbine engines has motivated the development of advanced controllers for ensuring their safe and reliable operation. In this paper, the problem of controller design for a two-shaft industrial gas turbine is addressed. Specifically, a transient dynamic engine model has been developed in MATLAB/Simulink for assessing the performance behavior of the engine. Observed engine behavior during transient manoeuvres has enabled the development of a PI controller capable of ensuring a smooth gas turbine operation. The performance of the gas turbine engine implementing the developed PI controller has been also compared to a fractional PI controller. Results demonstrate and illustrate the remarkable impact that transient engine simulation has in the development of robust controller

NASA Tech Briefs, October 2002

Topics include: a technology focus on sensors, electronic components and systems, software, materials, materials, mechanics, manufacturing, physical sciences, information sciences, book and reports, motion control and a special section of Photonics Tech Briefs

An introduction to fractional calculus

An introduction to fractional calculu

On fractional kinetic equations k-Struve functions based solutions

In the present research article, we investigate the solutions for fractional kinetic equations, involving k-Struve functions, some of the salient properties of which we present. The method used is Laplace transform based. The methodology and results can be adopted and extended to various related fractional problems in mathematical physics. 2010 MSC: 26A33, 33E12, 44A10, 44A20, Keywords: Fractional kinetic equations, Laplace transforms, k-Struve function, Fractional calculu