Welchen Umfang haben Schattenwirtschaft und Schwarzarbeit? Ein Versuch zur Lösung des Rätsels

In der November-Ausgabe 2005 des WIRTSCHAFTSDIENST hat Walter A. S. Koch die Schätzungen von Dominik H. Enste und Friedrich Schneider zur Größe der Schattenwirtschaft kritisch bewertet. Dr. Enste und Prof. Schneider stellen hier noch einmal ihre Schätzmethoden dar. Im Anschluss daran eine Erwiderung von Prof. Koch und eine Antwort von Dr. Enste und Prof. Schneider. --

Hypergeometric Series and Harmonic Number Identities

The classical hypergeometric summation theorems are exploited to derive several striking identities on harmonic numbers including those discovered recently by Paule and Schneider (2003).Comment: 10 page

Spectral analysis of the sdO K 648, the exciting star of the planetary nebula Ps 1 in the globular cluster M 15 (NGC 7078)

We present a spectral analysis of the sdO central star K 648 based on medium-resolution optical and high-resolution UV spectra. The photospheric parameters are determined by means of state-of-the-art NLTE model atmosphere techniques. We found Teff = 39 +/- 2 kK and log g = 3.9 +/- 0.2. The helium (He/H=0.08) and oxygen (O/H=0.001) abundances are about solar while carbon is enriched by a factor of 2.5 (C/H=0.001). Nitrogen (N/H = 10**(-6), [N/H] = -2.0) appears at a sub-solar value. However, these metal abundances are much higher than the cluster's metallicity M 15: [Fe/H] = -2.25). The surface composition appears to be a mixture of the original hydrogen-rich material and products of helium burning (3 alpha process) which have been mixed up to the surface. The abundances of He, C, and N are consistent with the nebular abundance, while O is considerably more abundant in the photosphere than in the nebula. From a comparison of its position in the log Teff - log g plane with evolutionary calculations a mass of 0.57 (+0.02, -0.01) Msun and a luminosity of 3810 +/- 1200 Lsun are deduced. Our spectroscopic distance d = 11.1 (+2.4, -2.9) kpc is in agreement with the distance of M 15 as determined by Alves et al. (2000). From the GHRS spectra we measure a radial velocity of vrad = -130 km/sec.Comment: 8 pages, 13 figure

Alejandro Schneider (comp.), Trabajadores. Un análisis sobre el accionar de la clase obrera argentina en la segunda mitad del siglo XX

Alejandro Schneider (comp.), Trabajadores. Un análisis sobre el accionar de la clase obrera argentina en la segunda mitad del siglo XX, Buenos Aires, Herramienta, 2009, ISBN 978-987-1505-12-8 (192 págs.

Kajian Budidaya Pohon Eboni

Pohon pohon eboni yang tumbuh di daerah Asia dan Afrika berasal dari keluarga Diospyros, suku Ebenaceae. Jenis-jenis pohon eboni yang berasal dari Afrika terutama Afrika Barat antara lain Diospyros ebenum dan D. melanoxylon.Pohon-pohon eboni yang tumbuh di daerah Asia relatif lebih banyak yang didokumentasikan, antara lain yang berasal dari India dan Ceylon Diospyros philippinensis, D. ebenum dan D. graciliflora; dari Filipina Diospyros pilosanthera, D. plicata, D.valascoi; dari Malaysia Diospyros buxifolia, D. scortechinii, D. clavigera, D. graciliflora dan D. lucida (Cox, 1939; Burkill,1935; Schneider, 1916)

John W. Barriger III: Railroad Legend

Review of: John W. Barriger III: Railroad Legend, by H. Roger Grant

Monsters and men : the life and works of Sascha Schneider

Sascha Schneider was an artist that was incredibly popular, but only for a short time during his life in the late nineteenth and early twentieth- century. This thesis will discuss the life and work of Schneider, with special attention on the significance of the interpersonal relationships he developed, and the importance of these relationships to his artistic career. By tracing his early life in St. Petersburg, Russia and his transition to an established life in Dresden, Germany, one can obtain a sense of his early influences. In Dresden he received an Education from the Dresden Art Academy, and it was there that he made on of his most important friendships with artist Max Klinger. Klinger helped Schneider establish himself as a Symbolist painter, and introduced him to other artists who proved to be paramount to his success later in life. Schneider eventually teamed up with novelist Karl May, and was commissioned to created the covers for over twenty-five of May’s adventure stories. Through his work is May, Schneider’s art was placed in the hands of many young Germans. Later in life, Schneider created a school for boys, Kraft-Kunst, with friends Richard Müller and Hans Unger. This school focused on physical fitness and the creation of the perfect male form, while fostering the artistic talents of the young students

The Galaxy Proximity Effect in the Lyman-alpha Forest

Hydrodynamic cosmological simulations predict that the average opacity of the Ly-alpha forest should increase in the neighborhood of galaxies because galaxies form in dense environments. Recent observations (Adelberger et al. 2002) confirm this expectation at large scales, but they show a decrease of absorption at comoving separations Delta_r <~ 1 Mpc/h. We show that this discrepancy is statistically significant, especially for the innermost data point at Delta_r <= 0.5 Mpc/h, even though this data point rests on three galaxy-quasar pairs. Galaxy redshift errors of the expected magnitude are insufficient to resolve the conflict. Peculiar velocities allow gas at comoving distances >~ 1 Mpc/h to produce saturated absorption at the galaxy redshift, putting stringent requirements on any ``feedback'' solution. Local photoionization is insufficient, even if we allow for recurrent AGN activity that keeps the neutral hydrogen fraction below its equilibrium value. A simple ``wind'' model that eliminates all neutral hydrogen in spheres around the observed galaxies can marginally explain the data, but only if the winds extend to comoving radii ~1.5 Mpc/h.Comment: 4 pages, 1 figure; To appear in proceedings of the 13th Annual Astrophysics Conference in College Park, Maryland, The Emergence of Cosmic Structure, eds. S.Holt and C. Reynolds, (AIP