180,773 research outputs found
Indianer-Rassen und vergangene Kulturen, R. N. Wegner.
No full textLanglois L. Indianer-Rassen und vergangene Kulturen, R. N. Wegner. In: Journal de la Société des Américanistes. Tome 26 n°1, 1934. pp. 192-193
Indianer-Rassen und vergangene Kulturen, R. N. Wegner.
No full textLanglois L. Indianer-Rassen und vergangene Kulturen, R. N. Wegner. In: Journal de la Société des Américanistes. Tome 26 n°1, 1934. pp. 192-193
Spatially resolved spectroscopy of Coma Cluster early‐type galaxies. IV. Completing the data set
No full textThe long-slit spectra obtained along the minor axis, offset major axis, and diagonal axis are presented for 12 E and S0 galaxies of the Coma Cluster drawn from a magnitude-limited sample studied before. The rotation curves, velocity dispersion profiles, and the H_3 and H_4 coefficients of the Hermite decomposition of the line-of-sight velocity distribution are derived. The radial profiles of the Hβ, Mg, and Fe line strength indices are measured too. In addition, the surface photometry of the central regions of a subsample of four galaxies recently obtained with the Hubble Space Telescope is presented. The data will be used to construct dynamical models of the galaxies and study their stellar populations
Are there new models of computation? Reply to Wegner and Eberbach
No full textWegner and Eberbach[Weg04b] have argued that there are fundamental limitations
to Turing Machines as a foundation of computability and that these can be overcome
by so-called superTuring models such as interaction machines, the [pi]calculus and the
$-calculus. In this paper we contest Weger and Eberbach claims
Chronicles of a switch hunt: gcm genes in development
No full textCo-conservation of sequence and function is an important principle during evolution. As a consequence, sequence-related genes often have similar functions in evolutionarily distant species. Enter the 'glial cells missing' (gcm) genes. They code for a small family of novel transcription factors that share DNA-binding properties and domain structure. However, no evolutionarily conserved function is apparent as yet. The prototypical gcm from Drosophila dominates nervous system development as a fate switch and master regulator of gliogenesis, whereas mammalian gcm genes have roles in placental morphogenesis and development of the parathyroid gland. Apparently, structure and function sometimes can go separate ways
R. F. Roth : Hauptmann im eidg. General-Stab. Brigade Adjutant der Brigade I
No full textSitzendes Kniestück in Dreiviertelansicht nach links mit beiden Händen auf den KnienL Wegner lith ; Stabslieut. Julius Sulzer Einsiedeln 1847Es handelt sich beim Blatt um eine Lithographie von Wegner nach einer Vorlage von Sulzer aus dem Jahr 1847Vermutlich aus der Sammlung Leonhard Ziegler zum Egli (1782-1854) Exemplar der Zentralbibliothek Zürich, Graphische Sammlung und Fotoarchi
Wegner estimate for Gaussian random magnetic fields
No full textFor the Schrödinger operator on L^2(R^2) with the magnetic field which is a sample path of a stationary Gaussian random field, a Wegner type estimate applicable for the proof of the Anderson localization is proven by referring a recent method by Erdős and Hasler, and the theory of the Malliavin calculus
The flattening and the orbital structure of early-type galaxies and collisionless N-body binary disc mergers
No full textWe use oblate axisymmetric dynamical models including dark haloes to determine the orbital structure of intermediate mass to massive early-type galaxies in the Coma galaxy cluster. We find a large variety of orbital compositions. Averaged over all sample galaxies the unordered stellar kinetic energy in the azimuthal and the radial direction are of the same order, but they can differ by up to 40 per cent in individual systems. In contrast, both for rotating and non-rotating galaxies the vertical kinetic energy is on average smaller than in the other two directions. This implies that even most of the rotating ellipticals are flattened by an anisotropy in the stellar velocity dispersions. Using three-integral axisymmetric toy models, we show that flattening by stellar anisotropy maximizes the entropy for a given density distribution. Collisionless disc merger remnants are radially anisotropic. The apparent lack of strong radial anisotropy in observed early-type galaxies implies that they may not have formed from mergers of discs unless the influence of dissipational processes was significant. © 2009 RAS
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