@inproceedings{KrausKubatKrtička2007,
  author    = {Kraus, M. and Kub{\´a}t, Jiř{\´i} and Krtička, Jiri},
  title     = {Wind emission of OB supergiants and the influence of clumping},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17757},
  year      = {2007},
  abstract  = {The influence of the wind to the total continuum of OB supergiants is discussed. For wind velocity distributions with β > 1.0, the wind can have strong influence to the total continuum emission, even at optical wavelengths. Comparing the continuum emission of clumped and unclumped winds, especially for stars with high β values, delivers flux differences of up to 30\% with maximum in the near-IR. Continuum observations at these wavelengths are therefore an ideal tool to discriminate between clumped and unclumped winds of OB supergiants.},
  language  = {en}
}
@inproceedings{Marchenko2007,
  author    = {Marchenko, S. V.},
  title     = {Wind inhomogeneities in low-Z environment : observations},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17769},
  year      = {2007},
  abstract  = {We discuss the results of time-resolved spectroscopy of three presumably single Population I Wolf-Rayet stars in the Small Magellanic Cloud, where the ambient metallicity is \$\sim 1/5 Z_\odot\$. We were able to detect and follow numerous small-scale wind-embedded inhomogeneities in all observed stars. The general properties of the moving features, such as their velocity dispersions, emissivities and average accelerations, closely match the corresponding characteristics of small-scale inhomogeneities in the winds of Galactic Wolf-Rayet stars.},
  language  = {en}
}
@inproceedings{Weis2007,
  author    = {Weis, K.},
  title     = {Wind relics : clumps, inhomogeneities and outflows in LBV nebulae},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18235},
  year      = {2007},
  abstract  = {The most massive stars are those with the shortest but most active life. One group of massive stars, the Luminous Blue Variables (LBVs), of which only a few objects are known, are in particular of interest concerning the stability of stars. They have a high mass loss rate and are close to being instable. This is even more likely as rotation becomes an important factor in stellar evolution of these stars. Through massive stellar winds and sometimes giant eruptions, LBV nebulae are formed. Various aspects in the evolution in the LBV phase lead, beside the large scale morphological and kinematical differences, to a diversity of small structures like clumps, rims, and outflows in these nebulae.},
  language  = {en}
}
@inproceedings{Szeifert2007,
  author    = {Szeifert, T.},
  title     = {Wind variabilities and asymmetries in Luminous Blue Variables},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18146},
  year      = {2007},
  abstract  = {Luminous Blue Variables show strong changes in their stellar wind on time scales of typically years to decades when they expand and contract radially at approximately constant luminosity. Micro-variability on shorter time scales and amplitudes can be observed superimposed to the larger scale radial changes. I will show long-term time series of high resolution spectra which we have collected in the past 20 years for many of the well known LBVs together with a few time series of weekly sampling (HR Car, R40, R71, R110, R127, S Dor) covering a time windows of up to a few months. Wind variability is seen on short and intermediate time scales with the line profiles changing from P Cygni to inverse P Cygni and double peeked profiles sometimes for the same star and spectral line. On longer time scales the ionisation levels for all chemical elements change drastically due to the strong change of the temperature on the stellar surface. While on the long term the characteristic radial changes may have impact on the over all mass loss rates, the variabilities and asymmetries on short and intermediate time scales may cause false estimates of the mass loss rates when confronting models with the observed line profiles},
  language  = {en}
}
@inproceedings{CassinelliIgnaceWaldronetal.2007,
  author    = {Cassinelli, Joseph P. and Ignace, R. and Waldron, W. and Cho, J. and Murphy, N. and Lazarian, A.},
  title     = {X-ray line emission produced in clump bow shocks},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18057},
  year      = {2007},
  abstract  = {We summarize Chandra observations of the emission line profiles from 17 OB stars. The lines tend to be broad and unshifted. The forbidden/intercombination line ratios arising from Helium-like ions provide radial distance information for the X-ray emission sources, while the H-like to He-like line ratios provide X-ray temperatures, and thus also source temperature versus radius distributions. OB stars usually show power law differential emission measure distributions versus temperature. In models of bow shocks, we find a power law differential emission measure, a wide range of ion stages, and the bow shock flow around the clumps provides transverse velocities comparable to HWHM values. We find that the bow shock results for the line profile properties, consistent with the observations of X-ray line emission for a broad range of OB star properties.},
  language  = {en}
}
@inproceedings{RaassenHuchtMilleretal.2007,
  author    = {Raassen, A. J. J. and Hucht, K. A. van der and Miller, N. A. and Cassinelli, Joseph P.},
  title     = {XMM-Newton observations of zeta Orionis (O9.7 Ib) : a collisional ionization equilibrium model},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17747},
  year      = {2007},
  abstract  = {We present the analysis of XMM-Newton observations of ζ Orionis. The analysis is based on fitting to the total spectrum as well as diagnostics of individual line.},
  language  = {en}
}
@inproceedings{GebserHinrichsSchaubetal.2010,
  author    = {Gebser, Martin and Hinrichs, Henrik and Schaub, Torsten H. and Thiele, Sven},
  title     = {xpanda: a (simple) preprocessor for adding multi-valued propositions to ASP},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41466},
  year      = {2010},
  abstract  = {We introduce a simple approach extending the input language of Answer Set Programming (ASP) systems by multi-valued propositions. Our approach is implemented as a (prototypical) preprocessor translating logic programs with multi-valued propositions into logic programs with Boolean propositions only. Our translation is modular and heavily benefits from the expressive input language of ASP. The resulting approach, along with its implementation, allows for solving interesting constraint satisfaction problems in ASP, showing a good performance.},
  language  = {en}
}
@inproceedings{Schultze2005,
  author    = {Schultze, Winfried},
  title     = {Zufall - Wunsch - Planung : die Erwerbung von Nachl{\"a}ssen zur Bestandserg{\"a}nzung},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-6098},
  year      = {2005},
  abstract  = {Nachl{\"a}sse sind pers{\"o}nliches Eigentum und unterliegen deshalb keiner Abgabepflicht. Der Wunsch des Nachlassers bez{\"u}glich der weiteren Aufbewahrung seines schriftlichen Erbes ist demzufolge prim{\"a}r gegen{\"u}ber allen unseren W{\"u}nschen. Wir k{\"o}nnen nicht fordern, sondern nur bitten, uns durch eigene Leistungen anbieten und die zuk{\"u}nftigen Nachlassenden oder deren Erben {\"u}berzeugen. Die nicht vorhandene institutionelle Zust{\"a}ndigkeit f{\"u}r die {\"U}bernahme von Nachl{\"a}ssen erzeugt die Reibungspunkte zwischen den Einrichtungen, die sich um den Erwerb von Nachl{\"a}ssen bem{\"u}hen: Archive - Bibliotheken - Museen - Sammlungen. Die W{\"u}nsche zum Erwerb des Nachlasses einer bestimmten Person - egal ob Wissenschaftler, K{\"u}nstler oder Politiker - sind demzufolge immer an verschiedenen Orten gleichzeitig vorhanden. Der Zufall entscheidet dann leider meist dar{\"u}ber, an welcher Stelle der Nachlass zuk{\"u}nftig verwahrt und wissenschaftlich genutzt wird. Es stellt sich die Frage, ob wir auf solche Zuf{\"a}lle hoffen und warten sollen, oder ob wir nicht eher eine engagierte - gemeinsam zwischen den Archiven abgestimmte - Erwerbspolitik betrieben sollten. ------------ Beitr{\"a}ge zum Thema "Nachl{\"a}sse an Universit{\"a}ts- und Hochschularchiven sowie Archiven wissenschaftlicher Institutionen" im Rahmen der Fr{\"u}hjahrstagung der Fachgruppe 8: "Archivare an Hochschularchiven und Archiven wissenschaftlicher Institutionen" am 16./17. Juni an der Universit{\"a}t Potsdam.},
  subject      = {Archiv},
  language  = {de}
}