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de la Torre Castro, E. (author), Jurkat-Witschas, Tina (author), Afchine, Armin (author), Grewe, V. (author), Hahn, Valerian (author), Kirschler, Simon (author), Krämer, Martina (author), Lucke, J.R. (author), Spelten, Nicole (author)Despite their proven importance for the atmospheric radiative energy budget, the effect of cirrus on climate and the magnitude of their modification by human activity is not well quantified. Besides anthropogenic pollution sources on the ground, aviation has a large local effect on cirrus microphysical and radiative properties via the...journal article 2023
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Moser, Manuel (author), Voigt, Christiane (author), Jurkat-Witschas, Tina (author), Hahn, Valerian (author), Mioche, Guillaume (author), Jourdan, Olivier (author), Lucke, J.R. (author), Boose, Yvonne (author), Mech, Mario (author)Airborne in situ cloud measurements were carried out over the northern Fram Strait between Greenland and Svalbard in spring 2019 and summer 2020. In total, 811 min of low-level cloud observations were performed during 20 research flights above the sea ice and the open Arctic ocean with the Polar 5 research aircraft of the Alfred Wegener...journal article 2023
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Shan, X. (author), Steele-Dunne, S.C. (author), Huber, M. (author), Hahn, Sebastian (author), Wagner, Wolfgang (author), Bonan, Bertrand (author), Albergel, Clement (author), Calvet, Jean-Christophe (author), Ku, Ou (author), Georgievska, Sonja (author)A Deep Neural Network (DNN) is used to estimate the Advanced Scatterometer (ASCAT) C-band microwave normalized backscatter (σ40o), slope (σ′) and curvature (σ″) over France. The Interactions between Soil, Biosphere and Atmosphere (ISBA) land surface model (LSM) is used to produce land surface variables (LSVs) that are input to the DNN. The DNN...journal article 2022
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Siddiqi, M.A. (author), Hahn, Georg (author), Hamdioui, S. (author), Serdijn, W.A. (author), Strydis, C. (author)A Medical Body Area Network (MBAN) is an ensemble of collaborating, potentially heterogeneous, medical devices located inside, on the surface of or around the human body with the objective of tackling one or multiple medical conditions of the MBAN host. These devices-which are a special category of Wireless Body Area Networks (WBANs)–collect,...journal article 2022
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Hahn, F. (author), Dahlberg, E.A. (author), Eisert, J. (author), Pappa, A. (author)Quantum communication research has in recent years shifted to include multipartite networks for which questions of quantum network routing naturally emerge. To understand the potential for multipartite routing, we focus on the most promising architectures for future quantum networks-those connecting nodes close to each other. Nearest-neighbor...journal article 2022
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Petchiappan, A. (author), Steele-Dunne, S.C. (author), Vreugdenhil, M. (author), Hahn, S. (author), Wagner, W. (author), Oliveira, R. (author)Microwave observations are sensitive to plant water content and could therefore provide essential information on biomass and plant water status in ecological and agricultural applications. The combined data record of the C-band scatterometers on the European Remote-Sensing Satellites (ERS)-1/2, the Metop (Meteorological Operational satellite)...journal article 2022
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Lucke, J.R. (author), Jurkat-Witschas, Tina (author), Heller, Romy (author), Hahn, Valerian (author), Hamman, Matthew (author), Breitfuss, Wolfgang (author), Reddy Bora, Venkateshwar (author), Moser, Manuel (author), Voigt, Christiane (author)Supercooled large droplet (SLD) icing can occur behind the protected surfaces of an aircraft and create severe aerodynamic disturbances, which represent a safety hazard for aviation. Liquid water content (LWC) measurements in icing conditions that contain SLDs require instruments that are able to sample unimodal and bimodal droplet size...journal article 2022
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Mahdavi, Ardeshir (author), Ampatzi, Eleni (author), Andersen, Rune Korsholm (author), Barthelmes, Verena M (author), Favero, Matteo (author), Hahn, Jakob (author), Knudsen, Henrik N (author), Luna-Navarro, Alessandra (author), Roetzel, Astrid (author)Buildings’ expected (projected, simulated) energy use frequently does not match actual observations. This is commonly referred to as the energy performance gap. As such, many factors can contribute to the disagreement between expectations and observations. These include, for instance, uncertainty about buildings’ geometry, construction, systems,...journal article 2021
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Hahn, W. (author), Dobrovitski, V.V. (author)Long-lived coherences, emerging under periodic pulse driving in the disordered ensembles of strongly interacting spins, offer immense advantages for future quantum technologies, but the physical origin and the key properties of this phenomenon remain poorly understood. We theoretically investigate this effect in ensembles of different...journal article 2021
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Steele-Dunne, S.C. (author), Hahn, Sebastian (author), Wagner, Wolfgang (author), Vreugdenhil, M. (author)The TU Wien Soil Moisture Retrieval (TUW SMR) approach is used to produce several operational soil moisture products from the Advanced Scatterometer (ASCAT) on the Metop series of satellites as part of the EUMETSAT Satellite Application Facility on Support to Operational Hydrology and Water Management (H SAF). The incidence angle dependence...journal article 2021
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Hahn, Sebastian (author), Wagner, Wolfgang (author), Steele-Dunne, S.C. (author), Vreugdenhil, M. (author), Melzer, Thomas (author)This study investigates the performance of the TU Wien soil moisture retrieval (TUW-SMR) algorithm by adapting the strength of the vegetation correction. The semiempirical change detection method TUW-SMR exploits the multiangle backscatter observations from spaceborne fan-beam scatterometer systems in order to derive surface soil moisture...journal article 2020
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Vreugdenhil, M. (author), Navacchi, Claudio (author), Bauer-Marschallinger, Bernhard (author), Hahn, Sebastian (author), Steele-Dunne, S.C. (author), Pfeil, Isabella (author), Dorigo, Wouter (author), Wagner, Wolfgang (author)Vegetation products based on microwave remote sensing observations, such as Vegetation Optical Depth (VOD), are increasingly used in a variety of applications. One disadvantage is the often coarse spatial resolution of tens of kilometers of products retrieved from microwave observations from spaceborne radiometers and scatterometers. This can...journal article 2020
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Widyaningrum, E. (author), Fajari, M.K. (author), Lindenbergh, R.C. (author), Hahn, M. (author)Automation of 3D LiDAR point cloud processing is expected to increase the production rate of many applications including automatic map generation. Fast development on high-end hardware has boosted the expansion of deep learning research for 3D classification and segmentation. However, deep learning requires large amount of high quality...journal article 2020
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Abate, Alessandro (author), Blom, H.A.P. (author), Cauchi, Nathalie (author), Degiorgio, Kurt (author), Franzle, Martin (author), Hahn, Ernst Moritz (author), Haesaert, Sofie (author), Ma, H. (author), Oishi, Meeko (author)This report presents the results of a friendly competition for formal verification and policy synthesis of stochastic models. It also introduces new benchmarks within this category, and recommends next steps for this category towards next year’s edition of the competition. The friendly competition took place as part of the workshop Applied...conference paper 2019
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Hahn, F. (author), Satijn, S. (author)Document(en) uit de collectie Chemische Procestechnologie.report 1993
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- Hahn, G.T. (author) report 1976
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- Hahn, G.T. (author) report 1973
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- Hahn, G.T. (author) report 1971
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- Hahn, G.T. (author) report 1968
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- Hahn, G.T. (author) report 1966
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