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    <publishedYear>2022</publishedYear>
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    <language>eng</language>
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    <title language="eng">Non-destructive testing in civil engineering: A memorandum for teaching at German-speaking universities</title>
    <abstract language="eng">This contribution summarizes actual developments and draft fundamental teaching topics in the field of nondestructive testing in civil engineering (NDT-CE). It is based on the first memorandum on teaching and research in the field of NDT-CE at German speaking universities and provides an overview of the academic education and highlights possible focuses, especially in teaching but also takes into account noteworthy developments and topics in research in the field of NDT-CE.&#13;
Suggestions are given for the development and advancement of the teaching curricula in regards to a comprehensive and sound professional education of students in civil engineering and adjacent disciplines.</abstract>
    <parentTitle language="eng">Proceedings of NDT-CE 2022</parentTitle>
    <identifier type="url">https://www.ndt.net/article/ndtce2022/paper/61547_manuscript.pdf</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-563269</identifier>
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    <enrichment key="eventPlace">Zurich, Switzerland</enrichment>
    <enrichment key="eventStart">16.08.2022</enrichment>
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    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>R.W. Arndt</author>
    <author>C.U, Grosse</author>
    <author>D. Maehner</author>
    <author>Ernst Niederleithinger</author>
    <author>A. Taffe</author>
    <author>D. Algernon</author>
    <author>J. Berger</author>
    <author>S. Kessler</author>
    <author>M. Krueger</author>
    <author>Sabine Kruschwitz</author>
    <author>D. Ufermann-Wallmeier</author>
    <author>A. Walther</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Curriculum</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>NDT-CE</value>
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    <subject>
      <language>eng</language>
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      <value>University</value>
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      <language>eng</language>
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      <value>Competencies</value>
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    <collection role="ddc" number="543">Analytische Chemie</collection>
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    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
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  <doc>
    <id>62203</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
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    <language>eng</language>
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    <title language="eng">Elastic Reverse Time Migration for Improved Ultrasonic Imaging of Concrete Constructions</title>
    <abstract language="eng">The ageing concrete infrastructure worldwide requires a thorough inspection and assessment. The traditional visual and tap testing methods required by many national and international standard have been meanwhile amended by more sophisticated tools like ultrasonic or radar echo technologies. While they can provide a much more detailed image of the interiors of concrete constructions, there are still several unsolved testing tasks on the wish list, such as the reliable sizing of internal objects, e.g. tendon ducts.  &#13;
&#13;
Reverse Time Migration (RTM) is an imaging technique which is in use in the oil and gas industry for the exploration of new resources with seismic waves as a standard tool. Since about ten years there has been R&amp;D effort to use RTM for imaging of ultrasonic echo data. As it uses the entire wavefield, RTM has some advantages compared to traditional SAFT, e.g. the ability to image vertical structures or the backside of objects. However, this comes with the cost of having to perform full wavefield simulations. We have adopted, improved, and used open source 2D full elastic codes (P/SV waves and SH waves) from geophysics to evaluate the capabilities and limitations of RTM for the imaging of certain features in concrete constructions. We can show the advantages of SH-wave RTM in comparison to SAFT, acoustic RTM and P/SV-based RTM.     &#13;
&#13;
The findings are demonstrated based on simulated and real data, using a reference test specimen available at BAM. Position and diameter of tendon ducts have been determined with a sub-cm accuracy.</abstract>
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    <author>Ernst Niederleithinger</author>
    <subject>
      <language>eng</language>
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      <value>NDT-CE</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ultrasound</value>
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    <subject>
      <language>eng</language>
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      <value>Imaging</value>
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      <language>eng</language>
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      <value>Reverse Time Migration</value>
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    <subject>
      <language>eng</language>
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      <value>Concrete</value>
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    <subject>
      <language>eng</language>
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      <value>RTM</value>
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