@inproceedings{Kholtygin2007,
  author    = {Kholtygin, A. F.},
  title     = {Wavelets for looking for clumping in the wind of OB stars},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17796},
  year      = {2007},
  abstract  = {Clumping in hot-star winds : proceedings of an international workshop held in Potsdam, Germany, 18. - 22. June 2007},
  language  = {en}
}
@inproceedings{UrbanejaKudritzkiPuls2007,
  author    = {Urbaneja, M. A. and Kudritzki, R.-P. and Puls, Joachim},
  title     = {Clumping in the winds of O-type CSPNs},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17801},
  year      = {2007},
  abstract  = {Recent studies of massive O-type stars present clear evidences of inhomogeneous and clumped winds. O-type (H-rich) central stars of planetary nebulae (CSPNs) are in some ways the low mass-low luminosity analogous of those massive stars. In this contribution, we present preliminary results of our on-going multi-wavelength (FUV, UV and optical) study of the winds of Galactic CSPNs. Particular emphasis will be given to the clumping factors derived by means of optical lines (Hα and Heii 4686) and "classic" FUV (and UV) lines.},
  language  = {en}
}
@inproceedings{deKoterVinkMuijres2007,
  author    = {de Koter, A. and Vink, J. S. and Muijres, L.},
  title     = {Constraints on wind clumping from the empirical mass-loss vs. metallicity relation for early-type stars},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17736},
  year      = {2007},
  abstract  = {We present the latest results on the observational dependence of the mass-loss rate in stellar winds of O and early-B stars on the metal content of their atmospheres, and compare these with predictions. Absolute empirical rates for the mass loss of stars brighter than 10\$^{5.2} L_{\odot}\$, based on H\$\alpha\$ and ultraviolet (UV) wind lines, are found to be about a factor of two higher than predictions. If this difference is attributed to inhomogeneities in the wind this would imply that luminous O and early-B stars have clumping factors in their H\$\alpha\$ and UV line forming regime of about a factor of 3--5. The investigated stars cover a metallicity range \$Z\$ from 0.2 to 1 \$Z_{\odot}\$. We find a hint towards smaller clumping factors for lower \$Z\$. The derived clumping factors, however, presuppose that clumping does not impact the predictions of the mass-loss rate. We discuss this assumption and explain how we intend to investigate its validity in more detail.},
  language  = {en}
}
@inproceedings{ReyesIturbideVelazquezRosado2007,
  author    = {Reyes-Iturbide, J. and Vel{\´a}zquez, P. and Rosado, M.},
  title     = {3D numerical model for an asymmetrical superbubble},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17724},
  year      = {2007},
  abstract  = {Massive stars usually form groups such as OB associations. Their fast stellar winds sweep up collectively the surrounding insterstellar medium (ISM) to generate superbubbles. Observations suggest that superbubble evolution on the surrounding ISM can be very irregular. Numerical simulations considering these conditions could help to understand the evolution of these superbubbles and to clarify the dynamics of these objects as well as the difference between observed X-ray luminosities and the predicted ones by the standard model (Weaver et al. 1977).},
  language  = {en}
}
@inproceedings{GrohHillierDamineli2007,
  author    = {Groh, J. H. and Hillier, D. J. and Damineli, A.},
  title     = {Mass-loss rate and clumping in LBV stars : the impact of time-dependent effects},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17773},
  year      = {2007},
  abstract  = {This paper outlines a newly-developed method to include the effects of time variability in the radiative transfer code CMFGEN. It is shown that the flow timescale is often large compared to the variability timescale of LBVs. Thus, time-dependent effects significantly change the velocity law and density structure of the wind, affecting the derivation of the mass-loss rate, volume filling factor, wind terminal velocity, and luminosity. The results of this work are directly applicable to all active LBVs in the Galaxy and in the LMC, such as AG Car, HR Car, S Dor and R 127, and could result in a revision of stellar and wind parameters. The massloss rate evolution of AG Car during the last 20 years is presented, highlighting the need for time-dependent models to correctly interpret the evolution of LBVs.},
  language  = {en}
}
@inproceedings{Piskorski2008,
  author    = {Piskorski, Jakub},
  title     = {ExPRESS : extraction pattern recognition engine and specification suite},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-27227},
  year      = {2008},
  abstract  = {The emergence of information extraction (IE) oriented pattern engines has been observed during the last decade. Most of them exploit heavily finite-state devices. This paper introduces ExPRESS - a new extraction pattern engine, whose rules are regular expressions over flat feature structures. The underlying pattern language is a blend of two previously introduced IE oriented pattern formalisms, namely, JAPE, used in the widely known GATE system, and the unificationbased XTDL formalism used in SProUT. A brief and technical overview of ExPRESS, its pattern language and the pool of its native linguistic components is given. Furthermore, the implementation of the grammar interpreter is addressed too.},
  language  = {en}
}
@inproceedings{OPUS4-1412,
  title     = {The 3rd international IEEE scientific conference on physics and control (PhysCon 2007) : September 3rd-7th 2007 at the University of Potsdam},
  editor    = {Kurths, J{\"u}rgen and Fradkov, Alexander and Chen, Guanrong},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-15228},
  pages     = {345},
  year      = {2007},
  abstract  = {During the last few years there was a tremendous growth of scientific activities in the fields related to both Physics and Control theory: nonlinear dynamics, micro- and nanotechnologies, self-organization and complexity, etc. New horizons were opened and new exciting applications emerged. Experts with different backgrounds starting to work together need more opportunities for information exchange to improve mutual understanding and cooperation. The Conference "Physics and Control 2007" is the third international conference focusing on the borderland between Physics and Control with emphasis on both theory and applications. With its 2007 address at Potsdam, Germany, the conference is located for the first time outside of Russia. The major goal of the Conference is to bring together researchers from different scientific communities and to gain some general and unified perspectives in the studies of controlled systems in physics, engineering, chemistry, biology and other natural sciences. We hope that the Conference helps experts in control theory to get acquainted with new interesting problems, and helps experts in physics and related fields to know more about ideas and tools from the modern control theory.},
  language  = {en}
}
@inproceedings{Watson2008,
  author    = {Watson, Bruce W.},
  title     = {Advances in automata implementation techniques (Abstract)},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-27094},
  year      = {2008},
  language  = {en}
}
@inproceedings{Barthelemy2008,
  author    = {Barth{\´e}lemy, Fran{\c{c}}ois},
  title     = {Finite-state compilation of feature structures for two-level morphology},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-27120},
  year      = {2008},
  abstract  = {This paper describes a two-level formalism where feature structures are used in contextual rules. Whereas usual two-level grammars describe rational sets over symbol pairs, this new formalism uses tree structured regular expressions. They allow an explicit and precise definition of the scope of feature structures. A given surface form may be described using several feature structures. Feature unification is expressed in contextual rules using variables, like in a unification grammar. Grammars are compiled in finite state multi-tape transducers.},
  language  = {en}
}
@inproceedings{BlancConstantWatrin2008,
  author    = {Blanc, Olivier and Constant, Matthieu and Watrin, Patrick},
  title     = {Segmentation in super-chunks with a finite-state approach},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-27133},
  year      = {2008},
  abstract  = {Since Harris' parser in the late 50s, multiword units have been progressively integrated in parsers. Nevertheless, in the most part, they are still restricted to compound words, that are more stable and less numerous. Actually, language is full of semi-fixed expressions that also form basic semantic units: semi-fixed adverbial expressions (e.g. time), collocations. Like compounds, the identification of these structures limits the combinatorial complexity induced by lexical ambiguity. In this paper, we detail an experiment that largely integrates these notions in a finite-state procedure of segmentation into super-chunks, preliminary to a parser.We show that the chunker, developped for French, reaches 92.9\% precision and 98.7\% recall. Moreover, multiword units realize 36.6\% of the attachments within nominal and prepositional phrases.},
  language  = {en}
}