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- Gerd Sauermann, Klaus Kroy, Hans J. Herrmann
- Physical review. E, Statistical, nonlinear, and…
- 2001
We derive a phenomenological continuum saltation model for aeolian sand transport that can serve as an efficient tool for geomorphological applications. The coupled differential equations for the… (More)
- Klaus Kroy, Gerd Sauermann, Hans J. Herrmann
- Physical review. E, Statistical, nonlinear, and…
- 2002
We present a minimal model for the formation and migration of aeolian sand dunes in unidirectional winds. It combines a perturbative description of the turbulent wind velocity field above the dune… (More)
- Christian M. Schneider, André A. Moreira, José S. Andrade, Shlomo Havlin, Hans J. Herrmann
- Proceedings of the National Academy of Sciences…
- 2011
Terrorist attacks on transportation networks have traumatized modern societies. With a single blast, it has become possible to paralyze airline traffic, electric power supply, ground transportation… (More)
- José S. Andrade, Hans J. Herrmann, R. F. S. Andrade, Luciano R da Silva
- Physical review letters
- 2005
We introduce a new family of networks, the Apollonian networks, that are simultaneously scale-free, small-world, Euclidean, space filling, and with matching graphs. These networks describe force… (More)
- Orencio Durán, Veit Schwämmle, Hans J. Herrmann
- Physical review. E, Statistical, nonlinear, and…
- 2005
Beautiful dune patterns can be found in deserts and along coasts due to the instability of a plain sheet of sand under the action of the wind. Barchan dunes are highly mobile aeolian dunes found in… (More)
- Klaus Kroy, Gerd Sauermann, Hans J. Herrmann
- Physical review letters
- 2002
We propose a minimal model for aeolian sand dunes. It combines an analytical description of the turbulent wind velocity field above the dune with a continuum saltation model that allows for… (More)
- Christian M. Schneider, Nuri Yazdani, Nuno A M Araújo, Shlomo Havlin, Hans J. Herrmann
- Scientific reports
- 2013
Natural and technological interdependent systems have been shown to be highly vulnerable due to cascading failures and an abrupt collapse of global connectivity under initial failure. Mitigating the… (More)
- Orencio Durán, Hans J. Herrmann
- Physical review letters
- 2006
Vegetation is the most common and most reliable stabilizer of loose soil or sand. This ancient technique is for the first time cast into a set of equations of motion describing the competition… (More)
[1] We investigate the relevance of induration as an explanation for the occurrence of dunes of unusual morphology in the Martian north polar region. The evidence for induration of aeolian deposits… (More)
We present detailed shape measurements of several barchan dunes in southern Morocco, near Laayoune. Using these ˆ data, we disprove the concept of shape invariance of barchan dunes of different… (More)