WET-CAG2021: An international comparison of absolute gravimeters for the realization of the International Gravity Reference System

Autor: Axel Rülke, Reinhard Falk, Andreas Engfeldt, Julian Glässel, Andreas Hellerschmied, Domenico Iacovone, Jakub Kostelecký, Vojtech Pálinkáš, Marvin Reich, Ludger Timmen, Christian Ullrich, Alessandro Valluzzi, Hartmut Wziontek, Barbara Zehetmaier

Geodetic observations on Earth accurate to better than a part per billion require a common reference for the same precision as described in the goals of the Global Geodetic Observing System. The International Gravity Reference System (IGRS) is propos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::297655c24108c419fc77e212a26f95de
https://doi.org/10.5194/egusphere-egu22-2964

Simulating spray series of pesticides in agricultural practice reveals evidence for accumulation of environmental risk in soil

Autor: Alexandra Sybertz, Benjamin Daniels, Andreas Schäffer, Richard Ottermanns, Christian Ullrich, Martina Roß-Nickoll, Tobias Frische, Susanne Bär, Björn Scholz-Starke

Publikováno v: The Science of the total environment. 710

Multiple pesticide residues in the environment originate from combination products with two or more active substances, from tank mixtures prepared by the farmers and from subsequent applications of pesticides in spray series. Consequently, mixtures o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::626aa8c1a10671ade94d3a826429e8b6
https://pubmed.ncbi.nlm.nih.gov/31911253

Thermophysikalische Stoffwerte von Metallen und Metalllegierungen

Autor: Christian Ullrich, Thomas Bodmer

Publikováno v: Springer Reference Technik ISBN: 9783658134037

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c2802563801275330b00aaa8255a7d6c
https://doi.org/10.1007/978-3-662-52991-1_28-1

Valuation of IT Investments Using Real Options Theory

Autor: Christian Ullrich

Publikováno v: Business & Information Systems Engineering. 5:331-341

Real Options Theory is often applied to the valuation of IT investments. The application of Real Options Theory is generally accompanied by a monetary valuation of real options through option pricing models which in turn are based on restrictive assu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3754e3dcddee17c4d3ba701fe14ab064
https://doi.org/10.1007/s12599-013-0286-0

The European Comparison of Absolute Gravimeters 2011 (ECAG-2011) in Walferdange, Luxembourg: results and recommendations

Autor: Tristan Farah, Tim Wilkins, Xuan Songbo, Jaakko Mäkinen, Derek van Westrum, Geoff Shannon, Cédric Champollion, René Reudink, Marc Eckl, Hu Hua, Christine Guerlin, Christian Rothleitner, Jan Krynski, H. Wilmes, Francesco Baccaro, Nicolas Dando, Franck Pereira Dos Santos, Ray Tracey, Ryan M. Billson, Jonas Ågren, Daniel McLaughlin, Marcin Sękowski, H. Baumann, Jakub Kostelecký, Christian Ullrich, Li Zhengyuan, Pedro Inacio, Stefaan Castelein, Gilbert Klein, Vojtech Pálinkáš, Tomasz Olszak, Wu Kang, Tan Hongbo, Nicolas Le Moigne, Alessandro Germak, Sébastien Merlet, E. Biolcati, Shen Chongyang, Domenico Iacovone, Reinhard Falk, Ludger Timmen, Andreas Engfeldt, Olivier Francis, A. Pachuta, Jyri Näränen, Tomas Volarik, Marc Seil, Sabrina Deville

Publikováno v: Metrologia
Metrologia, IOP Publishing, 2013, 50 (3), pp.257-268. ⟨10.1088/0026-1394/50/3/257⟩
Metrologia, 2013, 50 (3), pp.257-268. ⟨10.1088/0026-1394/50/3/257⟩

We present the results of the third European Comparison of Absolute Gravimeters held in Walferdange, Grand Duchy of Luxembourg, in November 2011. Twenty-two gravimeters from both metrological and non-metrological institutes are compared. For the firs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9885d4c29c955bd67a7715ef1bf1cbf
https://doi.org/10.1088/0026-1394/50/3/257