Journal of Next-Generation Research 5.0
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Information and Communication Technologies for Development. Strengthening Southern-Driven Cooperation as a Catalyst for ICT4D: 15th IFIP WG 9.4 International Conference on Social Implications of Computers in Developing Countries, ICT4D 2019, Dar es Salaam, Tanzania, May 1–3, 2019, Proceedings, Part I
No full textInternational audienceBook Front Matter of AICT 55
Exposition littéraire itinérante "neu Christa Wolf lesen": Zum 90. Geburtstag von Christa Wolf am 18. März 2019
No full text14 Rollups. Themen und Texte ausgewählt von Studierenden der Humboldt-Universität zu Berlin;Redaktion (Leitung): Dr. Birgit Dahlk
Träume der Gewalt: Studien der Unverhältnismässigkeit zu Texten, Fotografien und Filmen. Nationalsozialismus, Kolonialismus, Kalter Krieg
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L’observatoire de la parentalité de l’océan Indien : Regards croisés sur les familles du Mozambique
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Consistency and representativeness of integrated water vapour from ground-based GPS observations and ERA-Interim reanalysis
No full textInternational audienceThis study examines the consistency and representativeness differences of daily integrated water vapour (IWV) data from ERA-Interim reanalysis and GPS observations at 120 global sites over a 16-year period (1995-2010). Various comparison statistics are analysed as a function of geographic, topographic, and climatic features. A small (± 1 kg m −2) bias is found in the reanalysis across latitudes (moist in northern and southern midlatitudes and dry in the tropics). The standard deviation of daily IWV differences is generally below 2 kg m −2 but peaks in the northern and southern storm-track regions. In general, the larger IWV differences are explained by increased representativeness errors , when GPS observations capture some small-scale variability that is not resolved by the reanalysis. A representativeness error statistic is proposed which measures the spatiotem-poral variability in the vicinity of the GPS sites, based on reanalysis data at the four surrounding grid points. It allows to predict the standard deviation of daily IWV differences with a correlation of 0.73. In general, representativeness differences can be reduced by temporal averaging and spatial interpolation from the four surrounding grid points. A small number of outlying cases (15 sites) which do not follow the general tendencies are further examined. It is found that their special topographic and climatic features strongly enhance the representativeness errors (e.g. steep topography, coastlines , and strong seasonal cycle in monsoon regions). Discarding these sites significantly improves the global ERA-Interim and GPS comparison results. The selection of sites a priori, based on the representativeness error statistic, is able to detect 11 out of the 15 sites and improve the comparison results by 20 % to 30 %
Barter and the Origin of Money and Some Insights from the Ancient Palatial Economies of Mesopotamia and Egypt
No full textLes mots du paysage et de la didactique
No full textInternational audienceGlossaire des principaux concepts sur lesquels s'appuie l'ouvrage "Sur les bancs du paysage"
ML-Based Knowledge Graph Curation: Current Solutions and Challenges
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Validation of an integrated satellite-data-driven response to an effusive crisis: the April–May 2018 eruption of Piton de la Fournaise
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Diachronic UAV Photogrammetry of a Sandy Beach in Brittany (France) for a Long-Term Coastal Observatory
No full textInternational audienceIn the dual context of coastal hazard intensification and the growing number of stakes exposed to these hazards, coastal observatories are in demand to provide a structured framework dedicated to long-term monitoring. This article describes the drone-based photogrammetry monitoring performed since 2006 on Porsmilin Beach (Brittany, France) in the framework of the DYNALIT (Littoral and Coastline Dynamics) observatory, focusing on data quality and the consistency of long-term time series under the influence of multiple technological evolutions: Unmanned Aerial Vehicles (UAV) platforms with the arrival of electric multirotor drones, processing tools with the development of structure-from-motion (SfM) photogrammetry, and operational modes of survey. A study case is presented to show the potential of UAV monitoring to study storm impacts and beach resilience. The relevance of high-accuracy monitoring is also highlighted. With the current method, an accuracy of 3 cm can be achieved on the digital elevation model (DEM) and the orthophotograph. The question of the representativity and frequency of DEM time points is raised