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- Steffen Fröhlich, Sven Winklmann
- 2008

up to dimension n ≤ 5, where |A| denotes the length of the second fundamental form, BR ⊂ Rm is a closed ball of radius R centered at some point p ∈ Σ, and C is a constant depending on natural… (More)

- Wolfgang R. Bauer, F Roder, +5 authors Georg Ertl
- Magnetic resonance in medicine
- 1997

Many NMR measurements of cardiac microcirculation (perfusion, intramyocardial blood volume) depend on some kind of assumption of intracapillary-extravascular water exchange rate, e.g., fast exchange.… (More)

- Anna Dall’Acqua, Steffen Fröhlich, Hans-Christoph Grunau, Friedhelm Schieweck
- 2008

We consider the Willmore boundary value problem for surfaces of revolution where, as Dirichlet boundary conditions, any symmetric set of position and angle may be prescribed. Using direct methods of… (More)

We study orthonormal normal sections of two-dimensional immersions in R, n ≥ 2, at which these sections are critical for a functional of total torsion. In particular, we establish upper bounds for… (More)

- Steffen Fröhlich, Martin Lotz, Thomas Korte, Andreas Luebbert, Karl Schügerl, M Seekamp
- Biotechnology and bioengineering
- 1991

Saccharomyces cerevisiae was cultivated in a 4-m(3) pilot plant airlift tower loop reactor with a draft tube in batch and continuous operations and for comparison in a laboratory airlift tower loop… (More)

In this paper we consider the existence and regularity problem for Coulomb frames in the normal bundle of two-dimensional surfaces with higher codimension in Euclidean spaces. While the case of two… (More)

For orthonormal normal sections of two-dimensional immersions in R we define torsion coefficients and a functional for the total torsion. We discuss normal sections which are critical for this… (More)

- Steffen Fröhlich
- 2005

In this overview report we generalize Erhard Heinz’ curvature estimate for minimal graphs in R to graphs in Rn of prescribed mean curvature. Secondly, we analyse these problems in the frame of the… (More)

- Timothy W Shimwell, Huub J A Röttgering, +69 authors Jonathan Zwart
- 2017

The LOFAR Two-metre Sky Survey (LoTSS) is a deep 120–168 MHz imaging survey that will eventually cover the entire northern sky. Each of the 3170 pointings will be observed for 8 h, which, at most… (More)

- Steffen Fröhlich, Martin Lotz, Bert Larson, Andreas Luebbert, Karl Schügerl, M Seekamp
- Biotechnology and bioengineering
- 1991

The local properties of the dispersed gas phase (gasholdup, bubble diamater, and bubble velocity) were measured and evaluated at different positions in the riser and downcomer of a pilot plant… (More)