TY - CHAP A1 - Peter, Pascal A1 - Hoffmann, Sebastian A1 - Nedwed, Frank A1 - Hoeltgen, Laurent A1 - Weickert, Joachim T1 - From Optimised Inpainting with Linear PDEs Towards Competitive Image Compression Codecs T2 - Image and Video Technology, 7th Pacific-Rim Symposium, PSIVT 2015, Auckland, New Zealand, November 25-27, 2015 N2 - For inpainting with linear partial differential equations (PDEs) such as homogeneous or biharmonic diffusion, sophisticated data optimisation strategies have been found recently. These allow high-quality reconstructions from sparse known data. While they have been explicitly developed with compression in mind, they have not entered actual codecs so far: Storing these optimised data efficiently is a nontrivial task. Since this step is essential for any competetive codec, we propose two new compression frameworks for linear PDEs: Efficient storage of pixel locations obtained from an optimal control approach, and a stochastic strategy for a locally adaptive, tree-based grid. Suprisingly, our experiments show that homogeneous diffusion inpainting can surpass its often favoured biharmonic counterpart in compression. Last but not least, we demonstrate that our linear approach is able to beat both JPEG2000 and the nonlinear state-of-the-art in PDE-based image compression. KW - Linear diffusion inpainting KW - Homogeneous KW - Biharmonic KW - Image compression KW - Probabilistic tree-densification Y1 - 2016 SN - 978-3-319-29450-6 U6 - https://doi.org/10.1007/978-3-319-29451-3_6 SP - 63 EP - 74 PB - Springer CY - Cham ER - TY - GEN A1 - Hübener, Heike A1 - Hoffmann, Peter A1 - Keuler, Klaus A1 - Pfeifer, Susanne A1 - Ramthun, Hans A1 - Spekat, Arne A1 - Steger, Christian A1 - Warrach-Sagi, Kirsten T1 - Deriving user-informed climate information from climate model ensemble results T2 - Advances in Science and Research Y1 - 2017 U6 - https://doi.org/10.5194/asr-14-261-2017 SN - 1992-0628 SN - 1992-0636 VL - 14 SP - 261 EP - 269 ER - TY - RPRT A1 - Hübener, Heike A1 - Bülow, Katharina A1 - Fooken, Cornelia A1 - Früh, Barbara A1 - Hoffmann, Peter A1 - Höpp, Simona A1 - Keuler, Klaus A1 - Menz, Christoph A1 - Mohr, Viktoria A1 - Radtke, Kai A1 - Woldt, Michael T1 - ReKliEs-De Ergebnisbericht Y1 - 2017 UR - reklies.hlnug.de/fileadmin/tmpl/reklies/dokumente/ReKliEs-De-Ergebnisbericht.pdf N1 - weitere Autoren PB - Eigenverlag des Hessischen Landesamtes HLNUG CY - Wiesbaden ER - TY - CHAP A1 - Herzberg, Heidrun A1 - Alheit, Peter A1 - Hoffmann, Stephanie A1 - Ricker, Kirsten A1 - Stroobants, Veerle ED - Papaioannou, Skevos ED - Alheit, Peter ED - Olesen, Henning Salling T1 - The ‚Strangeness’ of Public Spaces in Anogia. An Ethnomethodological Approach T2 - Education, Modernisation and Peripheral Community Y1 - 1998 SN - 87-7349-409-7 SP - 227 EP - 238 PB - RUC CY - Roskilde ER - TY - GEN A1 - Davin, Edouard A1 - Rechid, Diana A1 - Breil, Marcus A1 - Cardoso, Rita M. A1 - Coppola, Erika A1 - Hoffmann, Peter A1 - Jach, Lisa L. A1 - Katragkou, Eleni A1 - Noblet-Ducoudré, Nathalie de A1 - Radtke, Kai A1 - Raffa, Mario A1 - Soares, Pedro A1 - Sofiadis, Giannis A1 - Strada, Susanna A1 - Strandberg, Gustav A1 - Tölle, Merja H. A1 - Warrach-Sagi, Kirsten A1 - Wulfmeyer, Volker T1 - Biogeophysical impacts of deforestation in Europe First results from the LUCAS Regional Climate Mode intercomparison T2 - Earth System Dynamics N2 - The Land Use and Climate Across Scales Flagship Pilot Study (LUCAS FPS) is a coordinated community effort to improve the integration of land use change (LUC) in regional climate models (RCMs) and to quantify the biogeophysical effects of LUC on local to regional climate in Europe. In the first phase of LUCAS, nine RCMs are used to explore the biogeophysical impacts of re-/afforestation over Europe: two idealized experiments representing respectively a non-forested and a maximally forested Europe are compared in order to quantify spatial and temporal variations in the regional climate sensitivity to forestation. We find some robust features in the simulated response to forestation. In particular, all models indicate a year-round decrease in surface albedo, which is most pronounced in winter and spring at high latitudes. This results in a winter warming effect, with values ranging from +0.2 to +1 K on average over Scandinavia depending on models. However, there are also a number of strongly diverging responses. For instance, there is no agreement on the sign of temperature changes in summer with some RCMs predicting a widespread cooling from forestation (well below −2 K in most regions), a widespread warming (around +2 K or above in most regions) or a mixed response. A large part of the inter-model spread is attributed to the representation of land processes. In particular, differences in the partitioning of sensible and latent heat are identified as a key source of uncertainty in summer. Atmospheric processes, such as changes in incoming radiation due to cloud cover feedbacks, also influence the simulated response in most seasons. In conclusion, the multi-model approach we use here has the potential to deliver more robust and reliable information to stakeholders involved in land use planning, as compared to results based on single models. However, given the contradictory responses identified, our results also show that there are still fundamental uncertainties that need to be tackled to better anticipate the possible intended or unintended consequences of LUC on regional climates. Y1 - 2020 U6 - https://doi.org/10.5194/esd-11-183-2020 SN - 2190-4995 VL - 11 IS - 1 SP - 183 EP - 200 ER - TY - GEN A1 - Roggenbuck, Dirk A1 - Vermeire, Severine A1 - Hoffmann, Ilse A1 - Reinhold, Dirk A1 - Schierack, Peter A1 - Goihl, Alexander A1 - Arnim, Ulrike von A1 - De Hertogh, Gert A1 - Polymeros, Dimitrios A1 - Bogdanos, Dimitrios Petrou A1 - Bossuyt, Xavier T1 - Evidence of Crohn's disease-related anti-glycoprotein 2 antibodies in patients with celiac disease T2 - Clinical Chemistry and Laboratory Medicine Y1 - 2015 U6 - https://doi.org/10.1515/cclm-2014-0238 SN - 1437-4331 VL - 53 IS - 9 SP - 1349 EP - 1357 ER -