Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Stefan Helfert"'
Autor:
Christoph Wertenauer, Alexander Dressel, Eberhard Wieland, Hans-Jörg Wertenauer, Helmine Braitmaier, Anna Straub, Stefan Helfert, Nicolas Lützner, Winfried März
Publikováno v:
Frontiers in Medicine, Vol 11 (2024)
BackgroundThis study is the extension of the COVAG study. We compared two RATs, the Panbio COVID-19 Ag Rapid Test (Abbott) and the SD Biosensor Q SARS-CoV-2 Rapid Antigen Test (Roche), against RT-PCR on the foil of new variants.MethodsWe included 888
Externí odkaz:
https://doaj.org/article/3be290d05989416b9299f15b5558e9e3
Autor:
Jürgen Jahns, Stefan Helfert
Publikováno v:
OSA Optical Design and Fabrication 2021 (Flat Optics, Freeform, IODC, OFT).
The performance of dielectric dipoles with high refractive index is investigated for the implementation of a polarization-multiplexed metalens. Purpose is the implemention of two different phase profiles for two orthogonal polarization states.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54d0a68ac848417099e7163afe1c3ef2
https://doi.org/10.1364/flatoptics.2021.jtu1a.12
https://doi.org/10.1364/flatoptics.2021.jtu1a.12
Autor:
S. Auer, Torrence V. Johnson, Harald Krüger, Eduard Igenbergs, M. Roy, Manuel Grande, V. Tschernjawski, Elmar K. Jessberger, Ralf Srama, Tom Economou, Hans-Peter Röser, M. E. Burton, Nicolas Altobelli, Stefan Helfert, E. Khalisi, Jürgen Schmidt, Eberhard Grün, Frank Postberg, Anna Mocker, Mihaly Horanyi, Franz Lura, Georg Moragas-Klostermeyer, K. Fiege, Frank Spahn, Sean Hsu, S. Bugiel, D. Möhlmann, G. Linkert, Gerhard Schwehm, Veerle Sterken, K. Otto, Gregor E. Morfill, Jon K. Hillier, Uwe Beckmann, G. Matt, J. Svestka, Simon F. Green, Ove Havnes, Hugo Fechtig, Philip Lamy, Sascha Kempf
The interplanetary space probe Cassini/Huygens reached Saturn in July 2004 after seven years of cruise phase. The Cosmic Dust Analyzer (CDA) measures the interplanetary, interstellar and planetary dust in our solar system since 1999 and provided uniq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff2671a8cddd649359f51862a899fe30
http://arxiv.org/abs/1802.04772
http://arxiv.org/abs/1802.04772
Autor:
Eberhard Grün, Ralf Srama, Nicolas Altobelli, Kathrin Altwegg, James Carpenter, Luigi Colangeli, Karl-Heinz Glassmeier, Stefan Helfert, Hartmut Henkel, Mihaly Horanyi, Annette Jäckel, Sascha Kempf, Markus Landgraf, Neil McBride, Georg Moragas-Klostermeyer, Pasquale Palumbo, Han Scholten, Andre Srowig, Zoltan Sternovsky, Xavier Vo
Publikováno v:
Grün, E.; Srama, R.; Altobelli, N.; Altwegg, K.; Carpenter, J.; Colangeli, L.; Glassmeier, K.-H.; Helfert, S.; Henkel, H.; Horanyi, M.; Jäckel, A.; Kempf, S.; Landgraf, M.; McBride, N.; Moragas-Klostermeyer, G.; Palumbo, P.; Scholten, H.; Srowig, A.; Sternovsky, Z. and Vo, X. (2009). DuneXpress. Experimental astronomy, 23(3), pp. 981-999. Dordrecht: Springer 10.1007/s10686-008-9099-4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50903326162fe06ede808a869aeef93e
https://doi.org/10.1007/s10686-008-9099-4
https://doi.org/10.1007/s10686-008-9099-4
Autor:
H. Linnemann, A. Glasmachers, T. Conlon, S. Auer, M. Rachev, Georg Moragas-Klostermeyer, D. Harris, V. Tschernjawski, Ralf Srama, Stefan Helfert, Sascha Kempf, Eberhard Grün, A. Srowig
Publikováno v:
Earth, Moon, and Planets. 95:211-220
There are different types of dust particles in interplanetary space, such as dust from comets and asteroids, and interstellar grains traversing the solar system. Based on experience with current space dust instruments, a novel dust telescope is being
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c882e721ddfb9a3da465376849d6842
https://doi.org/10.1007/s11038-005-9040-z
https://doi.org/10.1007/s11038-005-9040-z
Autor:
Harald Krüger, Stefan Helfert, Ralf Srama, Sascha Kempf, Georg Moragas-Klostermeyer, Valeri Dikarev, Eberhard Grün
Publikováno v:
Icarus. 174:1-14
Dust particles, like photons, carry information from remote sites in space and time. From knowledge of the dust particles ' birthplace and their bulk properties, we can learn about the remote environment Out of which the particles were formed. This a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::856dbd4dc0031cd64a404c6ce8bbc8dc
https://doi.org/10.1016/j.icarus.2004.09.010
https://doi.org/10.1016/j.icarus.2004.09.010
Autor:
Harald Krüger, V. Tschernjawski, Nicolas Altobelli, Sascha Kempf, M. Burton, J. Bradley, Georg Moragas-Klostermeyer, Stefan Helfert, Eberhard Grün, S. Auer, Ralf Srama, T. V. Johnson
Publikováno v:
Icarus. 171:317-335
Dust particles in interplanetary space are expected to charge up to an electrostatic potential of about +5 V mostly by the solar UV (Horanyi, 1996, Annu. Rev. Astrophys. 34, 383). Since the dynamics of charged grains may be quite different from neutr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46d142a5068ef9625de1117756ec45c0
https://doi.org/10.1016/j.icarus.2004.05.017
https://doi.org/10.1016/j.icarus.2004.05.017
Autor:
Jürgen Jahns, Stefan Helfert
This first textbook on both micro- and nanooptics introduces readers to the technological development, physical background and key areas. The opening chapters on the physics of light are complemented by chapters on refractive and diffractive optical
Autor:
Neil McBride, M. E. Burton, Sascha Kempf, Simon F. Green, Georg Moragas-Klostermeyer, Ralf Srama, M. Roy, Frank Postberg, Eberhard Grün, Jon K. Hillier, J. Anthony M. McDonnell, Stefan Helfert
Publikováno v:
Science. 307:1274-1276
During Cassini's approach to Saturn, the Cosmic Dust Analyser (CDA) discovered streams of tiny (less than 20 nanometers) high-velocity (∼100 kilometers per second) dust particles escaping from the saturnian system. A fraction of these impactors ori
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78220a754a75598d0a44837acbd52545
https://doi.org/10.1126/science.1106218
https://doi.org/10.1126/science.1106218
Autor:
Zoltan Sternovsky, K. Drake, Andrew Colette, Frieder Heckmann, G. Matt, Sascha Kempf, S. Bugiel, Anna Mocker, Eberhard Grün, Günter Baust, Stefan Helfert, Jonathan Hillier, Ralf Srama, S. Auer, Frank Postberg, Hans-Peter Röser, K. Fiege, Tobin Munsat, Tobias Mellert, Anthony Shu, K. Otto
Publikováno v:
The Review of scientific instruments. 82(9)
Investigating the dynamical and physical properties of cosmic dust can reveal a great deal of information about both the dust and its many sources. Over recent years, several spacecraft (e.g., Cassini, Stardust, Galileo, and Ulysses) have successfull
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd624f1843707f763bca8b8254683fc6
https://pubmed.ncbi.nlm.nih.gov/21974623
https://pubmed.ncbi.nlm.nih.gov/21974623