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  • English  (8,725)
  • 2015-2019  (8,725)
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  • 1
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    GFZ GravIS RL06 Ice-Mass Change Products (2019)
    GFZ Data Services
    Details
    Publication Date: 2024-05-15
    Description: Abstract
    Description: Version History:09 June 2020:Release of Version 0002. This is an update of Version 0001 of the same data set. All changes and updates are documented in the changelog available via the data download section. Previously released versions of this data set are available at ftp://isdcftp.gfz-potsdam.de/grace/GravIS/GFZ/Level-3/ICE/old_versions---------------------------------------------------------------------------------------------GRACE/GRACE-FO Level-3 products representing ice-mass changes for the Antarctic Ice Sheet (AIS) and the Greenland Ice Sheet (GIS). The ice-mass changes are provided both as basin average product and as gridded product.Basin-average ice-mass changes are obtained using the inversion procedure based on a forward modelling approach as described in Sasgen et al. (2013) for the AIS and Sasgen et al. (2012) for the GIS.Gridded ice-mass changes are provided at polar-stereographic grids with a grid spacing of 50 x 50 km^2. The applied algorithm is based on tailored sensitivity kernels (Groh & Horwath, 2016), and has also been used to generate gravimetric mass balance products within the ESA Climate Change Initiative (CCI) projects for the AIS and the GIS.These Level-3 products are visualized at GFZ's web portal GravIS (http://gravis.gfz-potsdam.de).Link to data products: ftp://isdcftp.gfz-potsdam.de/grace/GravIS/GFZ/Level-3/ICE
    Keywords: Gravity Recovery And Climate Experiment (GRACE) ; GRACE Follow-on (GRACE-FO) ; Level-3 ; Mass ; Mass Transport ; Ice-mass Change ; Time Variable Gravity ; Antarctic Mass Balance ; Greenland Mass Balance ; Sea-level Change ; EARTH SCIENCE 〉 SOLID EARTH 〉 GRAVITY/GRAVITATIONAL FIELD ; Earth Observation Satellites 〉 NASA Earth System Science Pathfinder 〉 GRACE
    Language: English
    Type: Dataset , Dataset
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  • 2
    Monograph available for loan
    Monograph available for loan
    19th International Congress on the Carboniferous and Permian Cologne, July 29-August 2, 2019 : Field guides (2019)
    Köln : Institut für Geologie und Mineralogie der Universität zu Köln
    Details Availability
    Call number: M 24.95594
    Type of Medium: Monograph available for loan
    Pages: 302 Seiten , Illustrationen
    ISBN: 978-3-934027-27-5 , 9783934027275
    ISSN: 1437-3246
    Series Statement: Kölner Forum für Geologie und Paläontologie 24/2019
    Language: English
    Note: Contents Preface / H.-G. Herbig, M. Aretz, M.R.W. Amler & S. Hartenfels Field trip Al: The Uppermost Devonian and Lower Carboniferous in the type area of Southern Belgium / J. Denayer, C. Prestianni, B. Mottequin & E. POTY Field Trip A2: The Pennsylvanian of the Ruhr Basin and Osnabruck region, western Germany - facies, stratigraphy, and tectonics of a paralic foreland basin of the Variscides / V. Wrede, G. Drozdzewski, D. Juch, A. Leipner & M. Sowiak Field Trip A3: The classical Central European Permian: Continental "Rotliegend", marine "Zechstein", and the Permian-Triassic Transition in Germany / J. Schneider, T. Wotte, B. Gaitzsch, R. Werneburg, S. Zeibig & F. Scholze Field Trip Cl: The Mississippian Kulm Basin of the Rhenish Mountains, western Germany - fauna, facies, and stratigraphy of a mixed carbonate-siliciclastic foreland basin / H.-G. Herbig, D. Korn, M.R.W. Amler, S. Hartenfels & H. Jäger Field Trip C2: Pennsylvanian-Permian of the Saar-Nahe Basin, SW Germany / S. Voigt, T. Schindler, H. Thum & J. Fischer Field Trip C3: The Pennsylvanian-Permian of the Southern Alps (Carnic Alps/Karavanke Mts.), Austria/ Italy/Slovenia - fauna, facies and stratigraphy of a mixed carbonate- siliciclastic shallow marine platform along the northwestern Palaeotethys margin / M. Novak, H.C. Forke & H.P. Schönlaub
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 3
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    Geodynamics of complex plate boundary regions : Insights from numerical models of convergent eastern Mediterranean and divergent east African plate tectonics (2019)
    Utrecht University, Department of Earth Sciences
    In:  Utrecht Studies in Earth Sciences
    Details
    Publication Date: 2024-05-14
    Description: GPS satellite observations indicate that in the tectonically complex eastern Mediterranean and east African regions microplates rotate counterclockwise with respect to the neighboring African plate. Using 3D numerical models, Glerum relates these observations of crustal deformation to the dynamics of the lithosphere and the underlying mantle that may cause this deformation. Glerum first describes her additions to the ASPECT software necessary for numerically modeling the upper mantle and lithosphere dynamics of convergent and divergent plate boundaries. These additions include the tracking of multiple materials with different physical properties and nonlinear viscous as well as viscoplastic rheologies. The implementations of complex, multi-material rheologies are verified with well-known 2D benchmarks and multi-material viscoplasticity is applied in 3D time-dependent thermomechanical models of oceanic subduction. Subsequently, Glerum uses ASPECT to investigate the sensitivity of horizontal surface motions to individual geodynamic processes in the eastern Mediterranean. Identification of all mantle drivers that should participate in modeling attempts to explain observations of crustal flow is essential to fully exploit the information contained by surface motions about their driving processes. Glerum therefore employs 3D data-driven instantaneous dynamics models of compressible flow including a complete set of possible mantle drivers of surface deformation. The reference instantaneous flow model results indicate that mantle processes can explain a large part of the crustal motion of the Aegean-Anatolian microplate. Subsequent systematic perturbations of model properties with respect to this reference model help estimate the individual contributions of tectonic plate motions, slab pull and trench suction, and density-induced mantle flow interacting with the slab and overlying plates while moderated by the mantle’s bulk viscosity. In order of regional importance, the predicted crustal flow of the Aegean-Anatolian region is most sensitive to slab pull, followed by slab-mantle interaction and basal drag, mantle rheology, and the absolute plate motion reference frame. Lastly, Glerum demonstrates a possible mechanism for the counterclockwise rotation of the Victoria microplate in the East African Rift System, which is in striking contrast to the clockwise motion of the surrounding plates. 3D models of the divergent system show that Victoria’s rotation can be caused by the drag of the African and Somalian plates along the strong edges of the microplate, while the rift segments along inherited lithospheric weaknesses facilitate Victoria’s rotation. The amount of rotation is therefore primarily controlled by the distribution of preexisting stronger regions and the weaker Precambrian mobile belts that surround Victoria. The induced counterclockwise rotation of the microplate leads to a clockwise shift of the local extension direction from E-W to more WNW-ESE along the overlapping rift branches. Comparison of the resulting predicted stress field and tectonic regimes to observations helps to elucidate the interpretation of local stress and strain indicators and to reconcile different opening models used to interpret the East African Rift System.
    Language: English
    Type: info:eu-repo/semantics/doctoralThesis
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  • 4
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    Size Matters – Understanding Monumentality Across Ancient Civilizations (2019)
    transcript Verlag
    Details
    Publication Date: 2024-05-12
    Description: When talking about monuments, size undeniably matters – or does it? But how else can we measure monumentality? Bringing together researchers from various fields such as archaeology, museology, history, sociology, Mesoamerican studies, and art history, this book discusses terminological and methodological approaches in both theoretical contributions and various case studies. While focusing on architectural aspects, this volume also discusses the social meaning of monuments, the role of forced and free labour, as well as textual monumentality. The result is a modern interdisciplinary take on an important concept which is notoriously difficult to define. When talking about monuments, size undeniably matters – or does it? But how else can we measure monumentality? Bringing together researchers from various fields such as archaeology, museology, history, sociology, Mesoamerican studies, and art history, this book discusses terminological and methodological approaches in both theoretical contributions and various case studies. While focusing on architectural aspects, this volume also discusses the social meaning of monuments, the role of forced and free labour, as well as textual monumentality. The result is a modern interdisciplinary take on an important concept which is notoriously difficult to define.
    Keywords: Monumentality ; Architecture ; Energetics ; Identity ; Labour ; Monument ; Perception ; Reception ; Cultural History ; Ancient History ; History ; Monumentality ; Architecture ; Energetics ; Identity ; Labour ; Monument ; Perception ; Reception ; Cultural History ; Ancient History ; History ; thema EDItEUR::N History and Archaeology::NH History::NHC Ancient history
    Language: English
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  • 5
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    A Buddhist Ritual Manual on Agriculture Vajratuṇḍasamayakalparāja – Critical Edition (2019)
    De Gruyter
    Details
    Publication Date: 2024-05-11
    Description: A hitherto unpublished scripture of Buddhist dharani literature, the Vajratuṇḍasamayakalparāja has been recently discovered in five Nepalese manuscripts. This rare Sanskrit text from around the fifth century focuses on the ritual practice of thaumaturgic weather control for successful agriculture by the vidyadhara spell-master, linking the incantation tradition to the economic power of the Nepalese Buddhist community.
    Keywords: Nepal ; Indology ; Incantation ; Sanskrit ; thema EDItEUR::N History and Archaeology::NH History::NHM Australasian and Pacific history ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRF Buddhism
    Language: English
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  • 6
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    Chapter 13 Commemorating vanished ‘homelands’ (2019)
    Taylor & Francis | Routledge
    Details
    Publication Date: 2024-05-09
    Description: The twentieth century has been described (e.g., Piskorski 2015 ) as a century of displacement. While globally the comparative scale of involuntary population movement may not have diff ered signifi cantly from earlier centuries, its perception has changed radically, leading in the early twenty- fi rst century to the dramatic resurgence of xenophobic populism across Europe and beyond (see Kaya 2017 ; De Cesari and Kaya 2019). Throughout the ‘refugee crisis’ of the 2010s, the German government’s moderate policy towards new migrants was widely criticised. The ideological foundation for that policy was, arguably, the country’s experience of integrating millions of ethnic German expellees and refugees from Central and Eastern Europe in the aftermath of the Second World War.
    Keywords: Germans ; Europe ; homelands ; heritage ; thema EDItEUR::N History and Archaeology::NH History
    Language: English
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  • 7
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    Sustainable Food System Assessment (2019)
    Taylor & Francis | Routledge
    Details
    Publication Date: 2024-05-09
    Description: food supply; environmental aspects; sustainable agriculture; nutrition policy
    Keywords: food supply ; environmental aspects ; sustainable agriculture ; nutrition policy ; thema EDItEUR::J Society and Social Sciences::JP Politics and government ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning
    Language: English
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  • 8
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    Voxelization algorithms for geospatial applications (2016)
    In:  MethodsX
    Details
    Publication Date: 2024-04-19
    Description: Voxel representations have been used for years in scientific computation and medical imaging. The main focus of our research is to provide easy access to methods for making large-scale voxel models of built environment for environmental modelling studies while ensuring they are spatially correct, meaning they correctly represent topological and semantic relations among objects. In this article, we present algorithms that generate voxels (volumetric pixels) out of point cloud, curve, or surface objects. The algorithms for voxelization of surfaces and curves are a customization of the topological voxelization approach [1]; we additionally provide an extension of this method for voxelization of point clouds. The developed software has the following advantages: • It provides easy management of connectivity levels in the resulting voxels. • It is not dependant on any external library except for primitive types and constructs; therefore, it is easy to integrate them in any application. • One of the algorithms is implemented in C++ and C for platform independence and efficiency.
    Language: English
    Type: info:eu-repo/semantics/article
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  • 9
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    Taming the beast: Free and open-source massive point cloud web visualization (2015)
    In:  Abstracts
    Details
    Publication Date: 2024-04-19
    Description: Powered by WebGL, some renderers have recently become available for the visualization of point cloud data over the web, for example Plasio or Potree. We have extended Potree to be able to visualize massive point clouds and we have successfully used it with the second national Lidar survey of the Netherlands, AHN2, with 640 billion points. In addition to the visualization, the publicly available service at http://ahn2.pointclouds.nl/ also features a multi-resolution download tool, a geographic name search bar, a measurement toolkit, a 2D orientation map with field of view depiction, a demo mode and the tuning of the visualization parameters. Potree relies on reorganizing the point cloud data into an multi-resolution octree data structure. However, this reorganization is very time consuming for massive data sets. Hence, we have used a divide and conquer approach to decrease the octree creation time. To achieve such performance improvement we divided the entire space into smaller cells, generated an octree for each of them in a distributed manner and then we merged them into a single massive octree. The merging is possible because the extent of all the nodes of the octrees is known and fixed. All the developed tools are free and open-source (FOSS) and they can be used to visualize over the web other massive point clouds.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 10
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    Seeing the Past with Computers: Experiments with Augmented Reality and Computer Vision for History (2019)
    University of Michigan Press
    Details
    Publication Date: 2024-04-14
    Description: Recent developments in computer technology are providing historians with new ways to see—and seek to hear, touch, or smell—traces of the past. Place-based augmented reality applications are an increasingly common feature at heritage sites and museums, allowing historians to create immersive, multifaceted learning experiences. Now that computer vision can be directed at the past, research involving thousands of images can recreate lost or destroyed objects or environments, and discern patterns in vast datasets that could not be perceived by the naked eye. Seeing the Past with Computers is a collection of twelve thought-pieces on the current and potential uses of augmented reality and computer vision in historical research, teaching, and presentation. The experts gathered here reflect upon their experiences working with new technologies, share their ideas for best practices, and assess the implications of—and imagine future possibilities for—new methods of historical study. Among the experimental topics they explore are the use of augmented reality that empowers students to challenge the presentation of historical material in their textbooks; the application of seeing computers to unlock unusual cultural knowledge, such as the secrets of vaudevillian stage magic; hacking facial recognition technology to reveal victims of racism in a century-old Australian archive; and rebuilding the soundscape of an Iron Age village with aural augmented reality. This volume is a valuable resource for scholars and students of history and the digital humanities more broadly. It will inspire them to apply innovative methods to open new paths for conducting and sharing their own research.
    Keywords: Media ; thema EDItEUR::U Computing and Information Technology::UB Information technology: general topics ; thema EDItEUR::U Computing and Information Technology::UG Graphical and digital media applications
    Language: English
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