Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (1/1 displayed)

  • 2014Improved GPR image focussing with repetitive normalised Superimposition techniques4citations

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Jenks, C. H. J.
1 / 3 shared
Pennock, Stephen
1 / 8 shared
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2014

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  • Jenks, C. H. J.
  • Pennock, Stephen
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document

Improved GPR image focussing with repetitive normalised Superimposition techniques

  • Jenks, C. H. J.
  • Abdul-Latif, O. M.
  • Pennock, Stephen
Abstract

<p>The Superimposition technique offers an alternative to Fast Fourier Transform (FFT) and Inverse FFT calculations. side lobe levels are reduced with little or no increase in main lobe width, as opposed to standard windowing techniques where side lobe level reduction produces an increase in main lobe width with a resulting loss in resolution. The new technique uses repetitive superimpositions showing improvements over spatially variant apodization (SVA) techniques. A new normalisation scheme enhances side lobe reduction even further with no increase in main lobe width indeed it can reduce the main lobe width. The technique is seen to be more resilient to noise when appropriate multiple evaluations are chosen. The technique produces responses from reflections in GPR data that are resolved to responses much closer to a delta function than FFT/IFFT or SVA evaluations. When used in focussing algorithms the traditional hyperbolic characteristics of a B-scan are focussed into responses whose width in depth and plan position that are slightly better than half a wavelength of the bandwidth used. This is seen in theoretical data and in both data measured by commercial GPRs and in experimental data from a step frequency continuous wave based GPR. Theoretically the technique produces a strong indication of the permittivity of the ground the GPR measures are taken over, while in measured data the identification of the permittivity of the ground is less clear.</p>

Topics
  • impedance spectroscopy
  • laser emission spectroscopy