223 research outputs found

    Evaluating the Quality and Accuracy of TanDEM-X Digital Elevation Models at Archaeological Sites in the Cilician Plain, Turkey

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    Satellite remote sensing provides a powerful instrument for mapping and monitoring traces of historical settlements and infrastructure, not only in distant areas and crisis regions. It helps archaeologists to embed their findings from field surveys into the broader context of the landscape. With the start of the TanDEM-X mission, spatially explicit 3D-information is available to researchers at an unprecedented resolution worldwide. We examined different experimental TanDEM-X digital elevation models (DEM) that were processed from two different imaging modes (Stripmap/High Resolution Spotlight) using the operational alternating bistatic acquisition mode. The quality and accuracy of the experimental DEM products was compared to other available DEM products and a high precision archaeological field survey. The results indicate the potential of TanDEM-X Stripmap (SM) data for mapping surface elements at regional scale. For the alluvial plain of Cilicia, a suspected palaeochannel could be reconstructed. At the local scale, DEM products from TanDEM-X High Resolution Spotlight (HS) mode were processed at 2 m spatial resolution using a merge of two monostatic/bistatic interferograms. The absolute and relative vertical accuracy of the outcome meet the specification of high resolution elevation data (HRE) standards from the National System for Geospatial Intelligence (NSG) at the HRE20 level

    Sea ice conditions in the Fram Strait during Polarstern cruise ARK-XX/2 (AIROTICA)

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    Observer team: John Bishop, Thomas Busche, David Flinspach, Wolfgang Hayek, Jan L. Lieser, Marika Marnela, Torge Martin, Andreas Pfaffling, Carola von Saldern, Gunnar Spree

    Briefe von Dunkelmännern =: Epistolae obscurorum virorum : an Magister Ortuin Gratius aus Deventer, Professor der schönen Wissenschaften zu Cöln /

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    Authorship of the Epistolae formerly attributed to Rouchlin, Erasmus, Hutten and others. More recent research has made it almost certain that Crotus Rubeanus and Ulrich von Hutten were the main contributors. To Crotus are credited the first 41 letters; to Hutten the 7 letters added later to the original series and most of the letters of the second series, with the possible co-operation of a third person, Hermann von dem Busche. The authorship of the rest remains doubtful.Mode of access: Internet

    Aequitas. Gesetz und Freiheit bei Thomas von Aquin

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    Contains fulltext : 227824pub.pdf (Publisher’s version ) (Open Access

    Erarbeitung eines Beziehungssystems zur Entwicklung eigenschaftsoptimierter Karosseriekonzepte in Mischbauweise

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    Aus der Einleitung: "Verschiedene Zielkonflikte zwischen den Anforderungen bzgl. Sicherheit, Wirtschaftlichkeit und Umweltverträglichkeit resultieren aus den Spannungsfeldern Umwelt, Wirtschaft und Technik (Busche 2014, Braess & Seiffert 2013). Richtungsentscheidungen bei der Festlegung der Anforderungen im Entwicklungsprozess auf Grundlage weniger Informationen bergen die Gefahr fehlerhafter Entscheidungen (Feldhusen & Grote 2013). Wird dies im weiteren Verlauf der Entwicklungsprozesse bemerkt sind Iterationsschleifen verbunden mit hohen Kosten notwendig, um dort nachzubessern (Ehrlenspiel et al. 2007). Der Grund für das große Informationsdefizit am Anfang des Entwicklungsprozesses sind die unbekannten Auswirkungen der Parametervariationen auf die Eigenschaften (Ehrlenspiel 2009). Diese resultieren u.a. aus den restriktiven Anforderungen, neuen Technologien oder alternativen Werkstoffen (Braess & Seiffert 2013). Muss das Nachfolgefahrzeug bspw. länger und flacher, bei gleicher Fahrdynamik werden oder leichter bei schärferen NVH- und Crash-Eigenschaften sein, müssen neue Strukturen, Materialien und Verfahren eingesetzt werden (Prinz 2011, Busche 2014). Bei Neukonstruktionen ist der Anteil unbekannter Auswirkungen noch höher (Ehrlenspiel 2009). ...

    1 and 5 Day Differential INSAR Under Crossing Orbits with TerraSAR-X

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    This paper presents investigations on a one year time series of crossing orbit differential interferometry SAR acquisitions with a 1-, 5- and 6-days temporal baseline. The conditions for crossing orbit interferometry are briefly discussed as the requirement of a common ground spectrum has to be satisfied. The uniquely short revisit times give the opportunity to perform interferometry on a glacier area, i.e. the Ronne ice-shelf, in X-band. The coherence results over one year as well as surface velocity measurements are shown and discussed

    Genomic and proteomic characterization of a newly isolated strain and its plasmid-mediated xanthan degradation

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    Thomas M, Schlüter A, Fjodorova J, Rückert-Reed C, Busche T, Niehaus K. Genomic and proteomic characterization of a newly isolated strain and its plasmid-mediated xanthan degradation. Microbiology Spectrum. 2025. Environmental soil samples enriched with xanthan gum led to the discovery and isolation of a novel strain of motile Paenarthrobacter ilicis in Bielefeld, Germany, which possesses a previously uncharacterized xanthan utilization gene region on its sole plasmid. This bacterium is the first member of the Paenarthrobacter genus to feature the ability to degrade xanthan. Growth experiments elucidated the optimal growth conditions with regard to pH (7.0) and temperature (28°C–30°C). The genome of Paenarthrobacter ilicis strain 6C consists of two replicons, namely a chromosome with 4,049,144 nucleotides (62.8% GC content) and a plasmid of 147,742 base pairs (61.8% GC content). This novel Paenarthrobacter ilicis strain carries 3,806 predicted coding regions, approximately half (51%) of which were verified with proteome analysis. Cultures grown with either glucose or xanthan as a carbon source were compared in relation to protein abundances at four growth stages and time points with regard to both intracellular and extracellular protein fractions. The proteome analysis (data are available via ProteomeXchange with identifier PXD063987) was undertaken using an LC-ESI-MS-MS shotgun proteomics approach, and the proteins were identified and quantified via label-free quantification using MaxQuant 2.6.6. This proteomics investigation exposed significant differences in protein abundances with regard to time and condition. Among the most highly enriched proteins seen when feeding exclusively on xanthan as a carbon source were enzymes encoded on a xanthan degradation plasmid (pPANIL_6C) with a xanthan utilization region coding for the PL8 xanthan lyase, GH38-, GH3-, GH9-family proteins, and several sugar transporters. These proteins constitute key components of a prospective xanthan degradation pathway
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