Zobrazeno 1 - 10
of 356
pro vyhledávání: '"F.-J. Becker"'
Autor:
Larissa Alexandra Cardoso Moraes, F. J. Becker, Adônis Moreira, José Marcos Gontijo Mandarino, Götz Schroth
Publikováno v:
Agronomy Journal. 109:629-635
The response of soybean [Glycine max (L.) Merr.] to foliar N application during pod formation has been inconsistent. The objective of this study over three growing seasons was to evaluate the effects of foliar N sources and rates of application on yi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::550fd6b98e3cd8564c308504446f6aa5
https://doi.org/10.2134/agronj2016.04.0199
https://doi.org/10.2134/agronj2016.04.0199
Autor:
F. J. Becker, Holger Hewener, Christian Degel, Heinrich Fonfara, Steffen Tretbar, Leonora Peter, Marc Fournelle, M. Ehrhardt
Publikováno v:
OCEANS 2017 - Aberdeen.
In recent years, the ultrasound division of the Fraunhofer IBMT has developed and manufactured several imaging sonar systems for different visualization purposes. For short-range high-resolution imaging, three different concepts of sonar systems have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db485c41f95d30d376753e19268a3ef9
https://doi.org/10.1109/oceanse.2017.8084758
https://doi.org/10.1109/oceanse.2017.8084758
Autor:
Daniel Speicher, Heinrich Fonfara, Marc Fournelle, Steffen Tretbar, F. J. Becker, Christian Degel, M. Ehrhardt, Holger Hewener
Publikováno v:
OCEANS 2016 MTS/IEEE Monterey.
In this work we present the evaluation results of our 3D sonar camera system. The system consists of a matrix antenna array with 1024 single transducer elements and our in house developed DiPhAS sonar beamformer - a 128 channel FPGA-based beamforming
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7eeff64206bd5e53e26aafdca5029d71
https://doi.org/10.1109/oceans.2016.7761232
https://doi.org/10.1109/oceans.2016.7761232
Autor:
Rosamunde F. J. Becker
Publikováno v:
World Studies in Education. 7:5-24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14d35385f5c5f013830ddd4b3a6d95f8
https://doi.org/10.7459/wse/07.2.02
https://doi.org/10.7459/wse/07.2.02
Autor:
Steffen Tretbar, Holger Hewener, F. J. Becker, Marc Fournelle, Christian Degel, Heinrich Fonfara, H. J. Welsch
Publikováno v:
2014 Oceans - St. John's.
A special aperture for a 3D sonar system is the so called Mills Cross antenna configuration. The Mills Cross arrangement looks like a “T” in which both antennas have a special function. In our work one antenna, consisting of 128 piezoelectric tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7149a2769947a75fb480a4f7fc4bb204
https://doi.org/10.1109/oceans.2014.7003133
https://doi.org/10.1109/oceans.2014.7003133
Autor:
Holger Hewener, Heinrich Fonfara, H. J. Welsch, F. J. Becker, Steffen Tretbar, Christian Degel, Marc Fournelle
Publikováno v:
2012 Oceans.
In this work we present an optimized multibeam echosounder (MBES) antenna and system design for high resolution sonar imaging. Furthermore the reconstruction concept based and delay-and-sum beamforming is presented. The antenna is based on high frequ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9598d179fa44ac60e80fd69cd2c01fc0
https://doi.org/10.1109/oceans.2012.6404968
https://doi.org/10.1109/oceans.2012.6404968
Autor:
Holger Hewener, M. Schmieger, M. Molitor, R. Lemor, P. Weber, D. Schmitt, Christian Degel, F. J. Becker, M. Heinz, M. Moses
Publikováno v:
OCEANS 2011 IEEE - Spain.
Sea and deep sea investigations depend on the availability of efficient and affordable technologies. Especially subsea surveys with underwater vehicles are very cost intensive. In this work we present the concept and the development of a modular unde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d95331fb5e6a89ee24a0b345dfad399c
https://doi.org/10.1109/oceans-spain.2011.6003547
https://doi.org/10.1109/oceans-spain.2011.6003547
Autor:
F. J. Becker, Holger Hewener, Marc Fournelle, Hj. Welsch, Steffen Tretbar, Christian Degel, Robert Lemor, Heinrich Fonfara
Publikováno v:
OCEANS'10 IEEE SYDNEY.
In this work, we present the design and performance assessment of a Multi Beam Echo Sounder (MBES) antenna for fast high resolution sonar imaging as a follow up to a previously presented concept based on high bandwidth transducers and frequency compo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::173b2601584fabd4a5f0c78447809550
https://doi.org/10.1109/oceanssyd.2010.5603837
https://doi.org/10.1109/oceanssyd.2010.5603837
Akademický článek
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Publikováno v:
OCEANS 2009-EUROPE.
In this work, we present a concept and the theoretical evaluation of a high resolution 3D imaging sonar system based on high bandwidth transducers and frequency compound imaging.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0833bebd6d2fcfa26c621b38219ffa6
https://doi.org/10.1109/oceanse.2009.5278106
https://doi.org/10.1109/oceanse.2009.5278106