نتایج جستجو برای: cosmo
تعداد نتایج: 1153 فیلتر نتایج به سال:
We consider the most general form for eleven dimensional supersymmetry compatible with on-shell superfields. This allows for the introduction of a conformal Spin(1, 10) connection. In eleven dimensional Minkowski space this modification is trivial and can be removed by a field redefinition, however, upon compactifica-tion on S 1 it is possible to introduce a non-trivial 'Wilson line'. The resul...
The excess numbers of blue galaxies at faint magnitudes are a long-standing cosmo-logical puzzle. We present new number-magnitude counts as a function of galactic morphology from the rst deep elds of the Cycle 4 Hubble Space Telescope Medium Deep Survey project. From a sample of 301 galaxies we deene counts for elliptical, spiral and irregular/peculiar galaxies to I = 22. We nd two principal re...
On 13 January 2012, the Italian vessel, Costa Concordia, wrecked offshore Giglio Island, along the coast of Tuscany (Italy). The ship partially sunk, lying on the starboard side on a 22° steep rocky seabed, making the stability conditions of the ship critically in danger of sliding, shifting and settling. The tilted position of the ship created also pernicious conditions for the divers involved...
Automated earthquake damage assessment from post-event only remotely sensed data is highly desirable, especially when new generation, Very High Resolution (VHR) spaceborne data is concerned, lacking extensive pre-event archives. Though, most damage assessment method either rely on human interpretation or on pre-post-event comparison. In this paper we illustrate some possible tracks for investig...
We establish a formal relationship between stationary axisymmet-ric spacetimes and T 3 Gowdy cosmological models which allows us to derive several preliminary results about the generation of exact cosmo-logical solutions and their possible behavior near the initial singularity. In particular, we argue that it is possible to generate a Gowdy model from its values at the singularity and that this...
This paper is focused on the urban edge detection topic, i.e. the identification of building and man made structures edges. An approach able to exploit jointly both the amplitudes and the interferometric phase of two complex SAR images is considered. This work is mainly focused on the application of this technique to real data sets. In particular, first experiments on COSMO-SkyMed data over the...
In the last years a new feature extraction approach from a single amplitude SAR image of urban areas has been introduced by the authors. In this paper they discuss the feasibility of this approach to detect changes in urban areas when natural hazards occur, with the aim to identify damaged or collapsed buildings by monitoring changes in the radiometric content of relevant SAR images. The test i...
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