Zobrazeno 1 - 10
of 804
pro vyhledávání: '"Welling, M."'
We study the magnetic flux landscape in YBa$_2$Cu$_3$O$_{7-x}$ thin films as a two dimensional rough surface. The vortex density in the superconductor forms a self-affine structure in both space and time. This is characterized by a roughness exponent
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411260
We present an experimental study of the influence of quenched disorder on the distribution of flux avalanches in type-II superconductors. In the presence of much quenched disorder, the avalanche sizes are power-law distributed and show finite size sc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410369
The penetration of magnetic flux into a thin film of YBa$_2$Cu$_3$O$_{7-x}$ is studied when the external field is ramped slowly. In this case the flux penetrates in bursts or avalanches. The size of these avalanches is distributed according to a powe
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305591
Autor:
Pantazis, P, Yaganoglu, S, Konstantinos, K, Vagena-Pantoula, C, Jülich, D, Gaub, B, Welling, M, Lopes, T, Lachowski, D, Tang, SS, Del Rio Hernandez, A, Salem, V, Müller, D, Holley, S, Vermot, J, Shi, J, Helassa, N, Török, K
Mechanosensing is a ubiquitous process to translate external mechanical stimuli into biological responses. Piezo1 ion channels are directly gated by mechanical forces and play an essential role in cellular mechanotransduction. However, readouts of Pi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______1032::71913b431f6b64cb8ba35a283bed1683
http://hdl.handle.net/10044/1/105402
http://hdl.handle.net/10044/1/105402
Autor:
Welling, M.
Publikováno v:
Nucl.Phys. B515 (1998) 436-452
In this paper we consider space-times containing matter expanding or contracting according to a time-dependent scale factor. Cosmologies with vanishing, positive or negative cosmological constant are considered. In the case of vanishing or negative c
Externí odkaz:
http://arxiv.org/abs/hep-th/9706021
Autor:
Welling, M.
Publikováno v:
Class.Quant.Grav. 15 (1998) 613-626
Using a PASCAL program to follow the evolution of two gravitating particles in 2+1 dimensions we find solutions in which the particles wind around one another indefinitely. As their center of mass moves `tachyonic' they form a Gott-pair. To avoid unp
Externí odkaz:
http://arxiv.org/abs/gr-qc/9704067
Autor:
Welling, M.
Publikováno v:
Nucl.Phys.Proc.Suppl. 57 (1997) 346-349
After a review of multi particle solutions in classical 2+1 dimensional gravity we will construct a one particle Hilbert space. As we will use a curved momentum space, the coordinates $x^\mu$ are represented as non commuting Hermitian operators on th
Externí odkaz:
http://arxiv.org/abs/gr-qc/9703057
Autor:
Welling, M.
Publikováno v:
Class.Quant.Grav. 14 (1997) 3313-3326
We find that the momentum conjugate to the relative distance between two gravitating particles in their center of mass frame is a hyperbolic angle. This fact strongly suggests that momentum space should be taken to be a hyperboloid. We investigate th
Externí odkaz:
http://arxiv.org/abs/gr-qc/9703058
Autor:
Welling, M.
Publikováno v:
Class.Quant.Grav. 14 (1997) 929-943
In this paper we describe the matter-free toroidal spacetime in 't Hooft's polygon approach to 2+1-dimensional gravity (i.e. we consider the case without any particles present). Contrary to earlier results in the literature we find that it is not pos
Externí odkaz:
http://arxiv.org/abs/gr-qc/9606011
Autor:
Welling, M., Bijlsma, M.
Publikováno v:
Class.Quant.Grav. 13 (1996) 1769-1774
In this paper we derive an expression for the conserved Pauli-Lubanski scalar in 't Hooft's polygon approach to 2+1-dimensional gravity coupled to point particles. We find that it is represented by an extra spatial shift $\Delta$ in addition to the u
Externí odkaz:
http://arxiv.org/abs/gr-qc/9601025