@inproceedings{Bischof2005,
author = {Bischof, Ulrike},
title = {Nachlasserschließung im Goethe- und Schiller-Archiv},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-6081},
year = {2005},
abstract = {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}
}
@inproceedings{Wiemers2005,
author = {Wiemers, Gerald},
title = {Der Nachlass des Erziehungswissenschaftlers und Philosophen Theodor Litt in seiner {\"o}ffentlichen Wirkung},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-6113},
year = {2005},
abstract = {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}
}
@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}
}
@inproceedings{Schmid2005,
author = {Schmid, Gerhard},
title = {Archivarische und bibliothekarische Verfahren der Nachlassbearbeitung},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-6228},
year = {2005},
abstract = {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}
}
@inproceedings{Arnold2006,
author = {Arnold, Gabriele},
title = {Beitr{\"a}ge zur spektralen Fernerkundung fester planetarer Oberfl{\"a}chen},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7235},
year = {2006},
abstract = {Dr. Gabriele Arnold ist Leiterin des Bereichs Optische Informationssyteme am Institut f{\"u}r Planetenforschung des Deutschen Zentrums f{\"u}r Luft- und Raumfahrt (DLR) in Berlin-Adlershof
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {de}
}
@inproceedings{DoktorBadeckBondeauetal.2006,
author = {Doktor, Daniel and Badeck, Franz-Werner and Bondeau, Alberte and Koslowsky, Dirk and Schaber, J{\"o}rg and McAllister, Murdock},
title = {Using satellite imagery and ground observations to quantify the effect of intra-annually changing temperature patterns on spring time phenology},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7244},
year = {2006},
abstract = {Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {en}
}
@inproceedings{Domsch2006,
author = {Domsch, Horst},
title = {Pr{\"a}gnante r{\"a}umlich-zeitliche Muster einer landwirtschaftlich genutzten Fl{\"a}che},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7257},
year = {2006},
abstract = {In ihrem Bem{\"u}hen, landwirtschaftliche Fl{\"a}chen standortgerecht zu bewirtschaften, sammelt eine zunehmende Anzahl landwirtschaftlicher Betriebe Informationen {\"u}ber die r{\"a}umlich-zeitliche Verteilung von Boden- und Pflanzenmerkmalen auf ihren Schl{\"a}gen. Diese Informationen dienen unmittelbar (Echtzeitansatz) oder mittelbar (Kartenansatz) zur Dosierung von D{\"u}nge- und Pflanzenschutzmitteln (Pr{\"a}zise Landbewirtschaftung). Zur Datensammlung werden vorrangig fahrzeuggest{\"u}tzte Sensoren und VIS- und NIR-Luftbilder, aufgenommen aus Sportflugzeugen, verwendet. Erste Betriebe erwerben von Dienstleistungsunternehmen aufbereitete Satelliten-Fernerkundungsdaten. Die landwirtschaftliche und agrartechnische Forschung ist bestrebt, die grundlegenden Muster (z.B. des Ertragspotentials) zu erkennen und damit den Aufwand der Betriebe f{\"u}r eine regelm{\"a}ßige Informationserfassung gering zu halten.
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {de}
}
@inproceedings{KuehlingMaerkerZehe2006,
author = {K{\"u}hling, Matthias and M{\"a}rker, Michael and Zehe, Erwin},
title = {Musterdynamik und Fernerkundung in der D{\"o}beritzer Heide : [Poster]},
editor = {Gzik, Axel and Hochschild, Volker and Schneider, Ingo and Schr{\"o}der, Boris},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7277},
year = {2006},
abstract = {Mit der politischen Wende in den Staaten des ehemaligen Ostblockes wurde f{\"u}r viele milit{\"a}risch genutzte Fl{\"a}chen ein tiefgreifender Nutzungswandel eingeleitet. Truppen{\"u}bungspl{\"a}tze als stark gest{\"o}rte Bestandteile unserer Kulturlandschaft weisen auf großen Fl{\"a}chen naturschutzfachlich wertvolle Habitatmosaike mit speziellen Lebensgemeinschaften auf. Der Nutzungswandel ist mit einer Ver{\"a}nderung der Vegetationsstrukturen (Sukzession) und weiteren landschafts{\"o}kologischen Prozessen verbunden. Der ehemalige Truppen{\"u}bungsplatz D{\"o}beritz im Norden der Landeshauptstadt Potsdam kann auf eine lange milit{\"a}rische Nutzungsgeschichte verweisen (erste Man{\"o}ver des Soldatenk{\"o}nigs im Jahr 1713). Nach 1992 wurden das NSG D{\"o}beritzer Heide (3.415 ha) und das NSG Ferbitzer Bruch (1.155 ha) ausgewiesen. Als Schutzgebiete nach der Vogelschutzrichtlinie sind sie Bestandteile des koh{\"a}renten Schutzgebietssystems Natura 2000 der europ{\"a}ischen Gemeinschaft. Trotz des Schutzstatus und der milit{\"a}rischen Altlasten unterliegt das Gebiet als gr{\"o}ßte zusammenh{\"a}ngende Naturfl{\"a}che im engeren Verflechtungsraum des Landes Brandenburg einem hohen Nutzungsdruck.
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {de}
}
@inproceedings{MaerkerSchroederEsselbachCapolongoetal.2006,
author = {M{\"a}rker, Michael and Schr{\"o}der-Esselbach, Boris and Capolongo, Domenico and Bentivenga, Mario},
title = {Geomorphological and pedological processes in badland areas of Southern Italy and their interaction with Mediterranean vegetation},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7288},
year = {2006},
abstract = {Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {en}
}
@inproceedings{BergmannKopp2006,
author = {Bergmann, Kirsten and Kopp, Stefan},
title = {Verbal or visual? : How information is distributed across speech and gesture in spatial dialog},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10375},
year = {2006},
abstract = {In spatial dialog like in direction giving humans make frequent use of speechaccompanying gestures. Some gestures convey largely the same information as speech while others complement speech. This paper reports a study on how speakers distribute meaning across speech and gesture, and depending on what factors. Utterance meaning and the wider dialog context were tested by statistically analyzing a corpus of direction-giving dialogs. Problems of speech production (as indicated by discourse markers and disfluencies), the communicative goals, and the information status were found to be influential, while feedback signals by the addressee do not have any influence.},
language = {en}
}
@inproceedings{Diderichsen2006,
author = {Diderichsen, Philip},
title = {Cross recurrence quantification analysis of indefinite anaphora in Swedish dialog : an eye-tracking pilot experiment},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10388},
year = {2006},
abstract = {A new method is used in an eye-tracking pilot experiment which shows that it is possible to detect differences in common ground associated with the use of minimally different types of indefinite anaphora. Following Richardson and Dale (2005), cross recurrence quantification analysis (CRQA) was used to show that the tandem eye movements of two Swedish-speaking interlocutors are slightly more coupled when they are using fully anaphoric indefinite expressions than when they are using less anaphoric indefinites. This shows the potential of CRQA to detect even subtle processing differences in ongoing discourse.},
language = {en}
}
@inproceedings{LueckingRieserStaudacher2006,
author = {L{\"u}cking, Andy and Rieser, Hannes and Staudacher, Marc},
title = {Multi-modal integration for gesture and speech},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10393},
year = {2006},
abstract = {Demonstratives, in particular gestures that "only" accompany speech, are not a big issue in current theories of grammar. If we deal with gestures, fixing their function is one big problem, the other one is how to integrate the representations originating from different channels and, ultimately, how to determine their composite meanings. The growing interest in multi-modal settings, computer simulations, human-machine interfaces and VRapplications increases the need for theories ofmultimodal structures and events. In our workshopcontribution we focus on the integration of multimodal contents and investigate different approaches dealing with this problem such as Johnston et al. (1997) and Johnston (1998), Johnston and Bangalore (2000), Chierchia (1995), Asher (2005), and Rieser (2005).},
language = {en}
}
@inproceedings{SagetGuyomard2006,
author = {Saget, Sylvie and Guyomard, Marc},
title = {Goal-oriented dialog as a collaborative subordinated activity involving collective acceptance},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10420},
year = {2006},
abstract = {Modeling dialog as a collaborative activity consists notably in specifying the contain of the Conversational Common Ground and the kind of social mental state involved. In previous work (Saget, 2006), we claim that Collective Acceptance is the proper social attitude for modeling Conversational Common Ground in the particular case of goal-oriented dialog. We provide a formalization of Collective Acceptance, besides elements in order to integrate this attitude in a rational model of dialog are provided; and finally, a model of referential acts as being part of a collaborative activity is provided. The particular case of reference has been chosen in order to exemplify our claims.},
language = {en}
}
@inproceedings{DeVaultStone2006,
author = {DeVault, David and Stone, Matthew},
title = {Scorekeeping in an uncertain language game},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10448},
year = {2006},
abstract = {Received views of utterance context in pragmatic theory characterize the occurrent subjective states of interlocutors using notions like common knowledge or mutual belief. We argue that these views are not compatible with the uncertainty and robustness of context-dependence in humanhuman dialogue. We present an alternative characterization of utterance context as objective and normative. This view reconciles the need for uncertainty with received intuitions about coordination and meaning in context, and can directly inform computational approaches to dialogue.},
language = {en}
}
@inproceedings{Kaufmann2006,
author = {Kaufmann, Hermann},
title = {Abbildende Spektrometrie},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7104},
year = {2006},
abstract = {Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {de}
}
@inproceedings{Sommer2006,
author = {Sommer, Michael},
title = {Nicht-invasive Methoden in der Bodenlandschaftsforschung},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7117},
year = {2006},
abstract = {Der Referent ist Leiter des Institutes f{\"u}r Bodenlandschaftsforschung am Leibniz-Zentrum f{\"u}r Agrarlandschaftsforschung (ZALF) e. V. in M{\"u}ncheberg.},
language = {de}
}
@inproceedings{KuhnertGuentnerKlannetal.2006,
author = {Kuhnert, Matthias and G{\"u}ntner, Andreas and Klann, Mechthild and Martin Garrido, F. and Zillgens, Birgit},
title = {Methods for spatial pattern comparison in distributed hydrological modelling : [Poster]},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7160},
year = {2006},
abstract = {The rigorous development, application and validation of distributed hydrological models obligates to evaluate data in a spatially distributed way. In particular, spatial model predictions such as the distribution of soil moisture, runoff generating areas or nutrient-contributing areas or erosion rates, are to be assessed against spatially distributed observations. Also model inputs, such as the distribution of modelling units derived by GIS and remote sensing analyses, should be evaluated against groundbased observations of landscape characteristics. So far, however, quantitative methods of spatial field comparison have rarely been used in hydrology. In this paper, we present algorithms that allow to compare observed and simulated spatial hydrological data. The methods can be applied for binary and categorical data on regular grids. They comprise cell-by-cell algorithms, cell-neighbourhood approaches that account for fuzziness of location, and multi-scale algorithms that evaluate the similarity of spatial fields with changing resolution. All methods provide a quantitative measure of the similarity of two maps. The comparison methods are applied in two mountainous catchments in southern Germany (Brugga, 40 km2) and Austria (L{\"o}hnersbach, 16 km2). As an example of binary hydrological data, the distribution of saturated areas is analyzed in both catchments. For categorical data, vegetation zones that are associated with different runoff generation mechanisms are analyzed in the L{\"o}hnersbach. Mapped spatial patterns are compared to simulated patterns from terrain index calculations and from satellite image analysis. It is discussed how particular features of visual similarity between the spatial fields are captured by the quantitative measures, leading to recommendations on suitable algorithms in the context of evaluating distributed hydrological models.},
language = {en}
}
@inproceedings{Wegehenkel2006,
author = {Wegehenkel, Martin},
title = {Die Nutzung von Fernerkundungsdaten in der Wasserhaushaltsmodellierung},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7050},
year = {2006},
abstract = {Die Pr{\"a}sentation gibt zuerst einen {\"U}berblick {\"u}ber m{\"o}gliche Parameter f{\"u}r die Wasserhaushaltsmodellierung, die aus Fernerkundungs(FE)-daten generell abgeleitet werden k{\"o}nnen. Bei der Beschreibung der Ableitungsverfahren dieser Parameter aus (FE)-Daten wird auf die Landnutzung, Vegetationsindices und die reale Evapotranspiration (ETr) fokussiert. Die Verfahren zur Bestimmung der ETr aus optischen FE-Daten lassen grob wie folgt gliedern : • Direkte Ableitung der Evapotranspiration aus radiometrisch bestimmten Oberfl{\"a}chen-temperaturen • Ableitung von Modellinputdaten wie z.B. Globalstrahlung, Albedo, Blattfl{\"a}cheniondex LAI und NDVI aus FE-Daten zur Anwendung von SoilVegetation-AtmosphereTransfer- und Energiebilanzmodellen wie z.B. SEBAL (Bastiaansen et al . 1998) • Kombinierte Anwendung verschiedenster Sensoren wie SAR-ERS1, LANDSAT-TM, NOAA-AHVRR mit SVAT-Modellen und hydrologischen Einzugsgebietsmodellen Die Validierung dieser Methoden wurde in verschiedenen Messkampagnen wie z.B. Lo-trex10E-HIBE, FIFE oder HAPEX-Sahel durchgef{\"u}hrt. Dabei wurde die aus dem entspre-chenden Sensor abgeleitete ETr mit gemessenen ETr-Raten von Ankerstationen innerhalb eines definierten Gebietes verglichen. Diese Ankerstationen leiteten die ETr aus Profil-, Ed-dy-Flux-, oder Szintillometermessungen ab. Durchg{\"a}ngige l{\"a}ngere Zeitreihen der ETr sind nur mit FE-Daten mit hoher Wiederholungsrate wie z.B. NOAA-AVHRR, MODIS hoher Zeitaufl{\"o}sung m{\"o}glich Mit Landsat-TM z.B. ergeben sich dagegen nur „Snap Shots" der ETr von einzelnen Tagen. Daher wurden oftmals Multisensorverfahren d.h. Kombination von z.B. Landsat-TM mit NOAA-AVHRR eingesetzt oder die FE-Daten nur f{\"u}r die Erhebung zeitin-varianter Eingangsdaten (z.B. Landnutzung) und zur raumbezogenen Validierung der ETr-Berechnungen von hydrologischen Modellen verwendet. Im zweiten Teil des Vortrags wird ein Anwendungsbeispiel f{\"u}r den Versuch einer r{\"a}umliche Validierung eines Wasserhaus-haltsmodells {\"u}ber NDVI-ETr-Datenprodukte aus Landsat-TM5-Daten f{\"u}r das Stobbergebiet. Ein weiteres Anwendungsbeispiel f{\"u}r die Einbindung von Landnutzungsdatenprodukten aus Landsat-TM5-Daten in die Wasserhaushaltmodellierung f{\"u}r das Ucker-Einzugsgebiet schliesst den Vortrag ab.
Dokument 1: Foliensatz | Dokument 2: Abstract
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {de}
}
@inproceedings{Schulz2006,
author = {Schulz, Karsten},
title = {Die Bedeutung r{\"a}umlicher Strukturen und Muster f{\"u}r das hydrologische Prozessgeschehen},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7087},
year = {2006},
abstract = {Der Referent ist stellvertretender Leiter des Departments Angewandte Landschafts{\"o}kologie des UFZ - Umweltforschungszentrum Leipzig-Halle am Fachbereich Umweltsystemmodellierung
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 20066},
language = {de}
}
@inproceedings{WolskaKruijffKorbayova2006,
author = {Wolska, Magdalena and Kruijff-Korbayov{\´a}, Ivana},
title = {Modeling anaphora in informal mathematical dialogue},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10455},
year = {2006},
abstract = {We analyze anaphoric phenomena in the context of building an input understanding component for a conversational system for tutoring mathematics. In this paper, we report the results of data analysis of two sets of corpora of dialogs on mathematical theorem proving. We exemplify anaphoric phenomena, identify factors relevant to anaphora resolution in our domain and extensions to the input interpretation component to support it.},
language = {en}
}
@inproceedings{KempsonCann2006,
author = {Kempson, Ruth and Cann, Ronnie},
title = {Dialogue pressures and syntactic change},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10469},
year = {2006},
abstract = {On the basis of the Dynamic Syntax framework, this paper argues that the production pressures in dialogue determining alignment effects and given versus new informational effects also drive the shift from case-rich free word order systems without clitic pronouns into systems with clitic pronouns with rigid relative ordering. The paper introduces assumptions of Dynamic Syntax, in particular the building up of interpretation through structural underspecification and update, sketches the attendant account of production with close coordination of parsing and production strategies, and shows how what was at the Latin stage a purely pragmatic, production-driven decision about linear ordering becomes encoded in the clitics in theMedieval Spanish system which then through successive steps of routinization yield the modern systems with immediately pre-verbal fixed clitic templates.},
language = {en}
}
@inproceedings{VlugterKnott2006,
author = {Vlugter, Peter and Knott, Alistair},
title = {A multi-speaker dialogue system for computer-aided language learning},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10208},
year = {2006},
abstract = {The main topic of this paper is how to configure a dialogue system to support computer-aided language learning. The paper also serves to introduce our new multi-speaker dialogue system, and highlight some of its novel features.},
language = {en}
}
@inproceedings{Karagjosova2006,
author = {Karagjosova, Elena},
title = {Correction and acceptance by contrastive focus},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10258},
year = {2006},
abstract = {An account is presented of the focus properties, common ground effect and dialogue behaviour of the accented German discourse marker "doch" and the accented sentence negation "nicht". It is argued that "doch" and "nicht" evoke as a focus alternative the logical complement of the proposition expressed by the sentence in which they occur, and that an analysis in terms of contrastive focus accounts for their effect on the common ground and their function in dialogue.},
language = {en}
}
@inproceedings{MacuraGinzburg2006,
author = {Macura, Zoran and Ginzburg, Jonathan},
title = {Acquiring words across generations : introspectively or interactively?},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10408},
year = {2006},
abstract = {How does a shared lexicon arise in population of agents with differing lexicons, and how can this shared lexicon be maintained over multiple generations? In order to get some insight into these questions we present an ALife model in which the lexicon dynamics of populations that possess and lack metacommunicative interaction (MCI) capabilities are compared. We ran a series of experiments on multi-generational populations whose initial state involved agents possessing distinct lexicons. These experiments reveal some clear differences in the lexicon dynamics of populations that acquire words solely by introspection contrasted with populations that learn using MCI or using a mixed strategy of introspection and MCI. The lexicon diverges at a faster rate for an introspective population, eventually collapsing to one single form which is associated with all meanings. This contrasts sharply with MCI capable populations in which a lexicon is maintained, where every meaning is associated with a unique word. We also investigated the effect of increasing the meaning space and showed that it speeds up the lexicon divergence for all populations irrespective of their acquisition method.},
language = {en}
}
@inproceedings{Thomas2006,
author = {Thomas, Kavita E.},
title = {Modelling Correction Signalled by "But" in Dialogue},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10308},
year = {2006},
abstract = {Claiming that cross-speaker "but" can signal correction in dialogue, we start by describing the types of corrections "but" can communicate by focusing on the Speech Act (SA) communicated in the previous turn and address the ways in which "but" can correct what is communicated. We address whether "but" corrects the proposition, the direct SA or the discourse relation communicated in the previous turn. We will also briefly address other relations signalled by cross-turn "but". After presenting a typology of the situations "but" can correct, we will address how these corrections can be modelled in the Information State model of dialogue, motivating this work by showing how it can be used to potentially avoid misunderstandings. We wrap up by showing how the model presented here updates beliefs in the Information State representation of the dialogue and can be used to facilitate response deliberation.},
language = {en}
}
@inproceedings{BeyssadeMarandin2006,
author = {Beyssade, Claire and Marandin, Jean-Marie},
title = {From complex to simple speech acts : a bidimensional analysis of illocutionary},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10319},
year = {2006},
abstract = {We present a new analysis of illocutionary forces in dialogue. We analyze them as complex conversational moves involving two dimensions: what Speaker commits herself to and what she calls on Addressee to perform. We start from the analysis of speech acts such as confirmation requests or whimperatives, and extend the analysis to seemingly simple speech acts, such as statements and queries. Then, we show how to integrate our proposal in the framework of the Grammar for Conversation (Ginzburg, to app.), which is adequate for modelling agents' information states and how they get updated.},
language = {en}
}
@inproceedings{Hara2006,
author = {Hara, Yurie},
title = {Question intonation and lexicalized bias expression},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10323},
year = {2006},
abstract = {This paper examines the interaction between different utterance types and the Japanese modal particle darou, and proposes that the decision-theoretic semantics accounts for the interaction among darou, sentence types and intonation.},
language = {en}
}
@inproceedings{ArtsteinPoesio2006,
author = {Artstein, Ron and Poesio, Massimo},
title = {Identifying reference to abstract objects in dialogue},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10357},
year = {2006},
abstract = {In two experiments, many annotators marked antecedents for discourse deixis as unconstrained regions of text. The experiments show that annotators do converge on the identity of these text regions, though much of what they do can be captured by a simple model. Demonstrative pronouns are more likely than definite descriptions to be marked with discourse antecedents. We suggest that our methodology is suitable for the systematic study of discourse deixis.},
language = {en}
}
@inproceedings{LascaridesStone2006,
author = {Lascarides, Alex and Stone, Matthew},
title = {Formal semantics for iconic gesture},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10330},
year = {2006},
abstract = {We present a formal analysis of iconic coverbal gesture. Our model describes the incomplete meaning of gesture that's derivable from its form, and the pragmatic reasoning that yields a more specific interpretation. Our formalism builds on established models of discourse interpretation to capture key insights from the descriptive literature on gesture: synchronous speech and gesture express a single thought, but while the form of iconic gesture is an important clue to its interpretation, the content of gesture can be resolved only by linking it to its context.},
language = {en}
}
@inproceedings{LueckingRieserStaudacher2006,
author = {L{\"u}cking, Andy and Rieser, Hannes and Staudacher, Marc},
title = {SDRT and multi-modal situated communication},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10348},
year = {2006},
abstract = {Classical SDRT (Asher and Lascarides, 2003) discussed essential features of dialogue like adjacency pairs or corrections and up-dating. Recent work in SDRT (Asher, 2002, 2005) aims at the description of natural dialogue. We use this work to model situated communication, i.e. dialogue, in which sub-sentential utterances and gestures (pointing and grasping) are used as conventional modes of communication. We show that in addition to cognitive modelling in SDRT, capturing mental states and speech-act related goals, special postulates are needed to extract meaning out of contexts. Gestural meaning anchors Discourse Referents in contextually given domains. Both sorts of meaning are fused with the meaning of fragments to get at fully developed dialogue moves. This task accomplished, the standard SDRT machinery, tagged SDRSs, rhetorical relations, the up-date mechanism, and the Maximize Discourse Coherence constraint generate coherent structures. In sum, meanings from different verbal and non-verbal sources are assembled using extended SDRT to form coherent wholes.},
language = {en}
}
@inproceedings{KranstedtLueckingPfeifferetal.2006,
author = {Kranstedt, Alfred and L{\"u}cking, Andy and Pfeiffer, Thies and Rieser, Hannes and Staudacher, Marc},
title = {Measuring and reconstructing pointing in visual contexts},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10362},
year = {2006},
abstract = {We describe an experiment to gather original data on geometrical aspects of pointing. In particular, we are focusing upon the concept of the pointing cone, a geometrical model of a pointing's extension. In our setting we employed methodological and technical procedures of a new type to integrate data from annotations as well as from tracker recordings. We combined exact information on position and orientation with rater's classifications. Our first results seem to challenge classical linguistic and philosophical theories of demonstration in that they advise to separate pointings from reference.},
language = {en}
}
@inproceedings{MillsHealey2006,
author = {Mills, Gregory J. and Healey, Patrick G. T.},
title = {Clarifying spatial descriptions : local and global effects on semantic co-ordination},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10414},
year = {2006},
abstract = {A key problem for models of dialogue is to explain the mechanisms involved in generating and responding to clarification requests. We report a 'Maze task' experiment that investigates the effect of 'spoof' clarification requests on the development of semantic co-ordination. The results provide evidence of both local and global semantic co-ordination phenomena that are not captured by existing dialogue co-ordination models.},
language = {en}
}
@inproceedings{DzikovskaCallawayStoneetal.2006,
author = {Dzikovska, Myroslava O. and Callaway, Charles B. and Stone, Matthew and Moore, Johanna D.},
title = {Understanding student input for tutorial dialogue in procedural domains},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10193},
year = {2006},
abstract = {We present an analysis of student language input in a corpus of tutoring dialogue in the domain of symbolic differentiation. Our focus on procedural tutoring makes the dialogue comparable to collaborative problem-solving (CPS). Existing CPS models describe the process of negotiating plans and goals, which also fits procedural tutoring. However, we provide a classification of student utterances and corpus annotation which shows that approximately 28\% of non-trivial student language in this corpus is not accounted for by existing models, and addresses other functions, such as evaluating past actions or correcting mistakes. Our analysis can be used as a foundation for improving models of tutoring dialogue.},
language = {en}
}
@inproceedings{ZeilingerMuttiStreckeretal.2006,
author = {Zeilinger, Gerold and Mutti, Maria and Strecker, Manfred and Rehak, Katrin and Bookhagen, Bodo and Schwab, Marco},
title = {Integration of digital elevation models and satellite images to investigate geological processes.},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7063},
year = {2006},
abstract = {In order to better understand the geological boundary conditions for ongoing or past surface processes geologists face two important questions: 1) How can we gain additional knowledge about geological processes by analyzing digital elevation models (DEM) and satellite images and 2) Do these efforts present a viable approach for more efficient research. Here, we will present case studies at a variety of scales and levels of resolution to illustrate how we can substantially complement and enhance classical geological approaches with remote sensing techniques. Commonly, satellite and DEM based studies are being used in a first step of assessing areas of geologic interest. While in the past the analysis of satellite imagery (e.g. Landsat TM) and aerial photographs was carried out to characterize the regional geologic characteristics, particularly structure and lithology, geologists have increasingly ventured into a process-oriented approach. This entails assessing structures and geomorphic features with a concept that includes active tectonics or tectonic activity on time scales relevant to humans. In addition, these efforts involve analyzing and quantifying the processes acting at the surface by integrating different remote sensing and topographic data (e.g. SRTM-DEM, SSM/I, GPS, Landsat 7 ETM, Aster, Ikonos…). A combined structural and geomorphic study in the hyperarid Atacama desert demonstrates the use of satellite and digital elevation data for assessing geological structures formed by long-term (millions of years) feedback mechanisms between erosion and crustal bending (Zeilinger et al., 2005). The medium-term change of landscapes during hundred thousands to millions years in a more humid setting is shown in an example from southern Chile. Based on an analysis of rivers/watersheds combined with landscapes parameterization by using digital elevation models, the geomorphic evolution and change in drainage pattern in the coastal Cordillera can be quantified and put into the context of seismotectonic segmentation of a tectonically active region. This has far-reaching implications for earthquake rupture scenarios and hazard mitigation (K. Rehak, see poster on IMAF Workshop). Two examples illustrate short-term processes on decadal, centennial and millennial time scales: One study uses orogen scale precipitation gradients derived from remotely sensed passive microwave data (Bookhagen et al., 2005a). They demonstrate how debris flows were triggered as a response of slopes to abnormally strong rainfall in the interior parts of the Himalaya during intensified monsoons. The area of the orogen that receives high amounts of precipitation during intensified monsoons also constitutes numerous landslide deposits of up to 1km3 volume that were generated during intensified monsoon phase at about 27 and 9 ka (Bookhagen et al., 2005b). Another project in the Swiss Alps compared sets of aerial photographs recorded in different years. By calculating high resolution surfaces the mass transport in a landslide could be reconstructed (M. Schwab, Universit{\"a}t Bern). All these examples, although representing only a short and limited selection of projects using remote sense data in geology, have as a common approach the goal to quantify geological processes. With increasing data resolution and new sensors future projects will even enable us to recognize more patterns and / or structures indicative of geological processes in tectonically active areas. This is crucial for the analysis of natural hazards like earthquakes, tsunamis and landslides, as well as those hazards that are related to climatic variability. The integration of remotely sensed data at different spatial and temporal scales with field observations becomes increasingly important. Many of presently highly populated places and increasingly utilized regions are subject to significant environmental pressure and often constitute areas of concentrated economic value. Combined remote sensing and ground-truthing in these regions is particularly important as geologic, seismicity and hydrologic data may be limited here due to the recency of infrastructural development. Monitoring ongoing processes and evaluating the remotely sensed data in terms of recurrence of events will greatly enhance our ability to assess and mitigate natural hazards.
Dokument 1: Foliensatz | Dokument 2: Abstract
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {en}
}
@inproceedings{OhrnbergerWassermannRichter2006,
author = {Ohrnberger, Matthias and Wassermann, Joachim and Richter, Gudrun},
title = {Automatic detection and classification of seismic signals for monitoring purposes},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7294},
year = {2006},
abstract = {Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {en}
}
@inproceedings{RehakStreckerEchtler2006,
author = {Rehak, Katrin and Strecker, Manfred and Echtler, Helmut Peter},
title = {DEM supported tectonic geomorphology : the Coastal Cordillera of the South-Central Chilean active margin ; [Poster]},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7224},
year = {2006},
abstract = {Fluvial systems are one of the major features shaping a landscape. They adjust to the prevailing tectonic and climatic setting and therefore are very sensitive markers of changes in these systems. If their response to tectonic and climatic forcing is quantified and if the climatic signal is excluded, it is possible to derive a local deformation history. Here, we investigate fluvial terraces and erosional surfaces in the southern Chilean forearc to assess a long-term geomorphic and hence tectonic evolution. Remote sensing and field studies of the Nahuelbuta Range show that the long-term deformation of the Chilean forearc is manifested by breaks in topography, sequences of differentially uplifted marine, alluvial and strath terraces as well as tectonically modified river courses and drainage basins. We used SRTM-90-data as basic elevation information for extracting and delineating drainage networks. We calculated hypsometric curves as an indicator for basin uplift, stream-length gradient indices to identify stream segments with anomalous slopes, and longitudinal river profiles as well as DS-plots to identify knickpoints and other anomalies. In addition, we investigated topography with elevation-slope graphs, profiles, and DEMs to reveal erosional surfaces. During the first field trip we already measured palaeoflow directions, performed pebble counting and sampled the fluvial terraces in order to apply cosmogenic nuclide dating (10Be, 26Al) as well as provenance analyses. Our preliminary analysis of the Coastal Cordillera indicates a clear segmentation between the northern and southern parts of the Nahuelbuta Range. The Lanalhue Fault, a NW-SE striking fault zone oblique to the plate boundary, defines the segment boundary. Furthermore, we find a complex drainage re-organisation including a drainage reversal and wind gap on the divide between the Tir{\´u}a and Pellahu{\´e}n basins east of the town Tir{\´u}a. The coastal basins lost most of their Andean sediment supply areas that existed in Tertiary and in part during early Pleistocene time. Between the B{\´i}o-B{\´i}o and Imperial rivers no Andean river is recently capable to traverse the Coastal Cordillera, suggesting ongoing Quaternary uplift of the entire range. From the spatial distribution of geomorphic surfaces in this region two uplift signals may be derived: (1) a long-term differential uplift process, active since the Miocene and possibly caused by underplating of subducted trench sediments, (2) a younger, local uplift affecting only the northern part of the Nahuelbuta Range that may be caused by the interaction of the forearc with the subduction of the Mocha Fracture Zone at the latitude of the Arauco peninsula. Our approach thus provides results in our attempt to decipher the characteristics of forearc development of active convergent margins using long-term geomorphic indicators. Furthermore, it is expected that our ongoing assessment will constrain repeatedly active zones of deformation.
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {en}
}
@inproceedings{ZeheBronstertItzerottetal.2006,
author = {Zehe, Erwin and Bronstert, Axel and Itzerott, Sibylle and B{\´a}rdossy, Andr{\´a}s and Ihringer, J{\"u}rgen},
title = {Hochwasservorhersage, Großhangbewegungen, Schadstofftransport},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7128},
year = {2006},
abstract = {Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006},
language = {de}
}
@inproceedings{PoppBlaumDomptailetal.2006,
author = {Popp, Alexander and Blaum, Niels and Domptail, Stephanie and Herpel, Nicole and Gr{\"o}ngr{\"o}ft, Alexander and Hoffman, T. T. and J{\"u}rgens, Norbert and Milton, Sue and Nuppenau, Ernst-August and Rossmanith, Eva and Schmidt, Michael and Vogel, Melanie and Vohland, Katrin and Jeltsch, Florian},
title = {From satellite imagery to soil-plant interactions},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7302},
year = {2006},
abstract = {Decisions for the conservation of biodiversity and sustainable management of natural resources are typically related to large scales, i.e. the landscape level. However, understanding and predicting the effects of land use and climate change on scales relevant for decision-making requires to include both, large scale vegetation dynamics and small scale processes, such as soil-plant interactions. Integrating the results of multiple BIOTA subprojects enabled us to include necessary data of soil science, botany, socio-economics and remote sensing into a high resolution, process-based and spatially-explicit model. Using an example from a sustainably-used research farm and a communally used and degraded farming area in semiarid southern Namibia we show the power of simulation models as a tool to integrate processes across disciplines and scales.},
language = {en}
}
@inproceedings{RossmanithBlaumKeiletal.2006,
author = {Rossmanith, Eva and Blaum, Niels and Keil, Manfred and Langerwisch, F. and Meyer, Jork and Popp, Alexander and Schmidt, Michael and Schultz, Christoph and Schwager, Monika and Vogel, Melanie and Wasiolka, Bernd and Jeltsch, Florian},
title = {Scaling up local population dynamics to regional scales},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7320},
year = {2006},
abstract = {In semi-arid savannas, unsustainable land use can lead to degradation of entire landscapes, e.g. in the form of shrub encroachment. This leads to habitat loss and is assumed to reduce species diversity. In BIOTA phase 1, we investigated the effects of land use on population dynamics on farm scale. In phase 2 we scale up to consider the whole regional landscape consisting of a diverse mosaic of farms with different historic and present land use intensities. This mosaic creates a heterogeneous, dynamic pattern of structural diversity at a large spatial scale. Understanding how the region-wide dynamic land use pattern affects the abundance of animal and plant species requires the integration of processes on large as well as on small spatial scales. In our multidisciplinary approach, we integrate information from remote sensing, genetic and ecological field studies as well as small scale process models in a dynamic region-wide simulation tool.
Interdisziplin{\"a}res Zentrum f{\"u}r Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006.},
language = {en}
}
@inproceedings{ReimerAharonianHintonetal.2007,
author = {Reimer, O. and Aharonian, Felix A. and Hinton, J. and Hofmann, W. and Hoppe, S. and Raue, M. and Reimer, A.},
title = {VHE gamma-rays from Westerlund 2 and implications for the inferred energetics},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18172},
year = {2007},
abstract = {The H.E.S.S. collaboration recently reported the discovery of VHE γ-ray emission coincident with the young stellar cluster Westerlund 2. This system is known to host a population of hot, massive stars, and, most particularly, the WR binary WR 20a. Particle acceleration to TeV energies in Westerlund 2 can be accomplished in several alternative scenarios, therefore we only discuss energetic constraints based on the total available kinetic energy in the system, the actual mass loss rates of respective cluster members, and implied gamma-ray production from processes such as inverse Compton scattering or neutral pion decay. From the inferred gammaray luminosity of the order of 1035erg/s, implications for the efficiency of converting available kinetic energy into non-thermal radiation associated with stellar winds in the Westerlund 2 cluster are discussed under consideration of either the presence or absence of wind clumping.},
language = {en}
}
@inproceedings{Hirschi2007,
author = {Hirschi, Raphael},
title = {The impact of reduced mass loss rates on the evolution of massive stars},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17616},
year = {2007},
abstract = {Mass loss is a very important aspect of the life of massive stars. After briefly reviewing its importance, we discuss the impact of the recently proposed downward revision of mass loss rates due to clumping (difficulty to form Wolf-Rayet stars and production of critically rotating stars). Although a small reduction might be allowed, large reduction factors around ten are disfavoured. We then discuss the possibility of significant mass loss at very low metallicity due to stars reaching break-up velocities and especially due to the metal enrichment of the surface of the star via rotational and convective mixing. This significant mass loss may help the first very massive stars avoid the fate of pair-creation supernova, the chemical signature of which is not observed in extremely metal poor stars. The chemical composition of the very low metallicity winds is very similar to that of the most metal poor star known to date, HE1327-2326 and offer an interesting explanation for the origin of the metals in this star. We also discuss the importance of mass loss in the context of long and soft gamma-ray bursts and pair-creation supernovae. Finally, we would like to stress that mass loss in cooler parts of the HR-diagram (luminous blue variable and yellow and red supergiant stages) are much more uncertain than in the hot part. More work needs to be done in these areas to better constrain the evolution of the most massive stars.},
language = {en}
}
@inproceedings{FullertonMassaPrinja2007,
author = {Fullerton, A. W. and Massa, D. L. and Prinja, R. K.},
title = {Revised mass-loss rates for O stars from the Pv resonance line},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17647},
year = {2007},
abstract = {The P v λλ1118, 1128 resonance doublet is an extraordinarily useful diagnostic of O-star winds, because it bypasses the traditional problems associated with determining mass-loss rates from UV resonance lines. We discuss critically the assumptions and uncertainties involved with using P v to diagnose mass-loss rates, and conclude that the large discrepancies between massloss rates determined from P v and the rates determined from "density squared" emission processes pose a significant challenge to the "standard model" of hot-star winds. The disparate measurements can be reconciled if the winds of O-type stars are strongly clumped on small spatial scales, which in turn implies that mass-loss rates based on Hα or radio emission are too large by up to an order of magnitude.},
language = {en}
}
@inproceedings{BouretLanzHillieretal.2007,
author = {Bouret, J.-C. and Lanz, T. and Hillier, D. J. and Foellmi, C.},
title = {Clumping in O-type Supergiants},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17662},
year = {2007},
abstract = {We have analyzed the spectra of seven Galactic O4 supergiants, with the NLTE wind code CMFGEN. For all stars, we have found that clumped wind models match well lines from different species spanning a wavelength range from FUV to optical, and remain consistent with Hα data. We have achieved an excellent match of the P V λλ1118, 1128 resonance doublet and N IV λ1718, as well as He II λ4686 suggesting that our physical description of clumping is adequate. We find very small volume filling factors and that clumping starts deep in the wind, near the sonic point. The most crucial consequence of our analysis is that the mass loss rates of O stars need to be revised downward significantly, by a factor of 3 and more compared to those obtained from smooth-wind models.},
language = {en}
}
@inproceedings{Gull2007,
author = {Gull, T. R.},
title = {Eta Carinae viewed from different vantages},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18200},
year = {2007},
abstract = {The spatially-resolved winds of the massive binary, Eta Carinae, extend an arcsecond on the sky, well beyond the 10 to 20 milliarcsecond binary orbital dimension. Stellar wind line profiles, observed at very different angular resolutions of VLTI/AMBER, HST/STIS and VLT/UVES, provide spatial information on the extended wind interaction structure as it changes with orbital phase. These same wind lines, observable in the starlight scattered off the foreground lobe of the dusty Homunculus, provide time-variant line profiles viewed from significantly different angles. Comparisons of direct and scattered wind profiles observed in the same epoch and at different orbital phases provide insight on the extended wind structure and promise the potential for three-dimensional imaging of the outer wind structures. Massive, long-lasting clumps, including the nebularWeigelt blobs, originated during the two historical ejection events. Wind interactions with these clumps are quite noticeable in spatially-resolved spectroscopy. As the 2009.0 minimum approaches, analysis of existing spectra and 3-D modeling are providing bases for key observations to gain further understanding of this complex massive binary.},
language = {en}
}
@inproceedings{Reimer2007,
author = {Reimer, A.},
title = {Clumping effects on non-thermal particle spectra in massive star systems},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18246},
year = {2007},
abstract = {Observational evidence exists that winds of massive stars are clumped. Many massive star systems are known as non-thermal particle production sites, as indicated by their synchrotron emission in the radio band. As a consequence they are also considered as candidate sites for non-thermal high-energy photon production up to gamma-ray energies. The present work considers the effects of wind clumpiness expected on the emitting relativistic particle spectrum in colliding wind systems, built up from the pool of thermal wind particles through diffusive particle acceleration, and taking into account inverse Compton and synchrotron losses. In comparison to a homogeneous wind, a clumpy wind causes flux variations of the emitting particle spectrum when the clump enters the wind collision region. It is found that the spectral features associated with this variability moves temporally from low to high energy bands with the time shift between any two spectral bands being dependent on clump size, filling factor, and the energy-dependence of particle energy gains and losses.},
language = {en}
}
@inproceedings{SchnurrCrowther2007,
author = {Schnurr, O. and Crowther, P. A.},
title = {Mid-IR observations of WC stars, and the connection to wind clumping},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17884},
year = {2007},
abstract = {We present preliminary results of a tailored atmosphere analysis of six Galactic WC stars using UV, optical, and mid-infrared Spitzer IRS data. With these data, we are able to sample regions from 10 to 10³ stellar radii, thus to determine wind clumping in different parts of the wind. Ultimately, derived wind parameters will be used to accuratelymeasure neon abundances, and to so test predicted nuclear-reaction rates.},
language = {en}
}
@inproceedings{VinkBenagliaDaviesetal.2007,
author = {Vink, J. S. and Benaglia, P. and Davies, B. and de Koter, A. and Oudmaijer, R. D.},
title = {Advances in mass-loss predictions},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17948},
year = {2007},
abstract = {We present the results of Monte Carlo mass-loss predictions for massive stars covering a wide range of stellar parameters. We critically test our predictions against a range of observed massloss rates - in light of the recent discussions on wind clumping. We also present a model to compute the clumping-induced polarimetric variability of hot stars and we compare this with observations of Luminous Blue Variables, for which polarimetric variability is larger than for O and Wolf-Rayet stars. Luminous Blue Variables comprise an ideal testbed for studies of wind clumping and wind geometry, as well as for wind strength calculations, and we propose they may be direct supernova progenitors.},
language = {en}
}
@inproceedings{MoffatHillierHamannetal.2007,
author = {Moffat, Anthony F. J. and Hillier, D. J. and Hamann, Wolf-Rainer and Owocki, S. P.},
title = {General Discussion},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17953},
year = {2007},
abstract = {Clumping in hot-star winds : proceedings of an international workshop held in Potsdam, Germany, 18. - 22. June 2007},
language = {en}
}
@inproceedings{Sonneborn2007,
author = {Sonneborn, G.},
title = {Imaging and spectroscopy with the James Webb Space Telescope},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17983},
year = {2007},
abstract = {The James Webb Space Telescope (JWST) is a large, infrared-optimized space telescope scheduled for launch in 2013. JWST will find the first stars and galaxies that formed in the early universe, connecting the Big Bang to our own Milky Way galaxy. JWST will peer through dusty clouds to see stars forming planetary systems, connecting the MilkyWay to our own Solar System. JWST's instruments are designed to work primarily in the infrared range of 1 - 28 μm, with some capability in the visible range. JWST will have a large mirror, 6.5 m in diameter, and will be diffraction-limited at 2 μm (0.1 arcsec resolution). JWST will be placed in an L2 orbit about 1.5 million km from the Earth. The instruments will provide imaging, coronography, and multi-object and integral-field spectroscopy across the 1 - 28 μm wavelength range. The breakthrough capabilities of JWST will enable new studies of massive star winds from the Milky Way to the early universe.},
language = {en}
}
@inproceedings{Owocki2007,
author = {Owocki, S. P.},
title = {Dynamical simulation of the "velocity-porosity" reduction in observed strength of stellar wind lines},
url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17992},
year = {2007},
abstract = {I use dynamical simulations of the line-driven instability to examine the potential role of the resulting flow structure in reducing the observed strength of wind absorption lines. Instead of the porosity length formalism used to model effects on continuum absorption, I suggest reductions in line strength can be better characterized in terms of a velocity clumping factor that is insensitive to spatial scales. Examples of dynamic spectra computed directly from instability simulations do exhibit a net reduction in absorption, but only at a modest 10-20\% level that is well short of the ca. factor 10 required by recent analyses of PV lines.},
language = {en}
}