Zobrazeno 1 - 10
of 396
pro vyhledávání: '"J. Hellwig"'
Publikováno v:
Hydrology and Earth System Sciences, Vol 28, Pp 4065-4083 (2024)
Human influences threaten environmental flows directly or indirectly through groundwater abstraction. In alluvial geological settings, these may affect the contributions from groundwater-sustaining streamflow during dry summer months. The Dreisam Riv
Externí odkaz:
https://doaj.org/article/e09451146d79440c95675a2bb88669dc
Autor:
G. Poelchen, J. Hellwig, M. Peters, D. Yu. Usachov, K. Kliemt, C. Laubschat, P. M. Echenique, E. V. Chulkov, C. Krellner, S. S. P. Parkin, D. V. Vyalikh, A. Ernst, K. Kummer
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-8 (2023)
Abstract Collective spin excitations in magnetically ordered crystals, called magnons or spin waves, can serve as carriers in novel spintronic devices with ultralow energy consumption. The generation of well-detectable spin flows requires long lifeti
Externí odkaz:
https://doaj.org/article/8fad77867c744b99acbbc09a4f2115eb
Publikováno v:
Hydrology and Earth System Sciences, Vol 25, Pp 1053-1068 (2021)
Groundwater is the main source of freshwater and maintains streamflow during drought. Potential future groundwater and baseflow drought hazards depend on the systems' sensitivity to altered recharge conditions. We performed groundwater model experime
Externí odkaz:
https://doaj.org/article/634faa91fe264c44b20774868acbf867
Autor:
J. Hellwig, K. Stahl
Publikováno v:
Hydrology and Earth System Sciences, Vol 22, Pp 6209-6224 (2018)
Drought is an important natural hazard with large impacts on society. Changes in drought characteristics have been studied for different parts of the hydrological cycle, but insights into changes of groundwater resources are obscured due to the lack
Externí odkaz:
https://doaj.org/article/9f8ad36a98b94a2f95bf753635ce9b12
Publikováno v:
Frontiers in Communication, Vol 7 (2022)
The applied disciplines of architecture and civil engineering require students to communicate multimodally, and to manipulate meaning across media and modes, such as image, writing or moving image. In their disciplinary studies for example, students
Externí odkaz:
https://doaj.org/article/1afe1cdb15ac44198b97c3cf6fb15ae3
Akademický článek
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Akademický článek
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Autor:
Eric Suero Molina, Sönke J. Hellwig, Anna Walke, Astrid Jeibmann, Herbert Stepp, Walter Stummer
Publikováno v:
73. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), Joint Meeting mit der Griechischen Gesellschaft für Neurochirurgie; 20220529-20220601; Köln; DOCV271 /20220525/
OBJECTIVE Fluorescence-guided resections performed using 5-aminolevulinic acid (5-ALA) have been studied extensively using the BLUE400 system. The authors introduce a triple–light-emitting diode (LED) headlight/loupe device for visualizing fluoresc
Publikováno v:
Environmental Research Letters. 17:094008
Droughts cause large economic and social impacts all over the world. During drought, groundwater maintains streamflow and can help to mitigate impacts. It governs how drought propagates through the hydrological cycle. Groundwater flows between topogr
Autor:
David J. Hellwig
Publikováno v:
Race and U.S. Foreign Policy from 1900 through World War II ISBN: 9780203822432
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::274e0330199521cf7fcb8d538632bfda
https://doi.org/10.4324/9780203822432-10
https://doi.org/10.4324/9780203822432-10