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  • Univ. Hamburg  (35)
  • Göttingen : Universitätsverlag Göttingen
  • English  (41)
  • 2010-2014  (41)
  • 1935-1939
  • 1
    Keywords: geological processes
    Description / Table of Contents: Rock fractures play a major role in many geological processes, such as plate tectonics, earthquakes, volcanic eruptions and fluid transport in the earth’s crust. The present volume contains the abstracts of all presentations of the symposium „Rock Fractures in Geological Processes“, held on 26-27 November 2013 in London honouring the 60th birthday of Agust Gudmundsson, chair in Structural Geology, Royal Holloway University of London, a leading expert in the field and author of a well known text book of the same title. The symposium covered all topics related to fractures in the earth’s crust, e.g., crustal stresses, rock mechanical properties, field analysis of fractures – from joints and faults to mineral veins and dykes -, analytical, analogue and numerical models of fractures and related fluid transport, as well as the activity of faults and volcanoes including calderas, and economic aspects such as exploration and exploitation of hydrocarbons and geothermal energy.
    Pages: Online-Ressource (70 Seiten)
    ISBN: 9783863951412
    Language: English
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  • 2
    Keywords: geobiology ; geology ; palaeontology
    Description / Table of Contents: This volume contains papers presented in part at a symposium held in May 2012 at Göttingen University, to honour Professor Joachim Reitner for his numerous contributions to the fields of geobiology, geology, and palaeontology. Our present volume reflects the breadth of Reitner’s interests and accomplishement with tributes and research or review papers by his students, former students, collaborators, and friends. The symposium was held in conjunction with Joachim Reitner’s 60th birthday. | Contents --- Hansen, B. T.: Preface --- Wiese, F.; Reich, M. & Arp, G.: Introduction --- Keupp, H. & Fuchs, D.: Different regeneration mechanisms in the rostra of aulacocerids (Coleoidea) and their phylogenetic implications --- Fuchs, D.: First evidence of Mastigophora (Cephalopoda: Coleoidea) from the early Callovian of La Voulte-sur- Rhône (France) --- Luo Cui; Schäfer, N.; Duda, J.-P. & Li Li-xia: Preservation of organic matter in sponge fossils: a case study of ‘round sponge fossils’ from the Cambrian Chengjiang Biota with Raman spectroscopy. --- Sánchez-Beristain, F.; Duda, J.-P.; López-Esquivel Kransksith, L. & García-Barrera, P.: A brief synopsis on the history of sponge research in the Upper Triassic St. Cassian Formation (Dolomites, NE Italy) --- Afşar, F.; Duda, J.-P.; Zeller, M.; Verwer, K.; Westphal, H. & Eberli, G. P.: First report of sponge rhaxes in the Picún Leufú Formation (Tithonian–Berriasian), Neuquén Basin, Argentina --- Janussen, D.: The second fossil Hyalonema species (Porifera: Hexactinellida), from the Late Cretaceous Arnager limestone, Bornholm, Denmark --- Riegel, W.; Wiese, F.; Arp, G. & Wilde, V.: Microphytoplankton from the Jena Formation (Lower Muschelkalk Subgroup, Anisian) in the forestry quarry at Herberhausen near Göttingen, Germany --- Arp, G. & Reimer, A.: Hydrochemistry, biofilms and tufa formation in the karstwater stream Lutter (Herberhausen near Göttingen) --- Dreier, A. & Hoppert, M.: Following the traces of symbiont bearing molluscs during earth history --- Heim, C.; Quéric, N.-V.; Ionescu, D.; Simon, K. & Thiel, V.: Chemolithotrophic microbial mats in an open pond in the continental subsurface – implications for microbial biosignatures --- Leefmann, T.; Blumenberg, M.; Schmidt, B. C. & Thiel, V.: Raman spectroscopy of biosignatures in methanerelated microbialites --- Cangemi, M. & Madonia, P.: Mud volcanoes in onshore Sicily: a short overview --- Haude, R.; Corriga, M. G.; Corradini, C. & Walliser, O. H.: Bojen-Seelilien (Scyphocrinitidae, Echinodermata) in neudatierten Schichten vom oberen Silur bis untersten Devon Südost- Marokkos --- Reich, M. & Ansorge, J.: Santonian sea cucumbers (Echinodermata: Holothuroidea) from Sierra del Montsec, Spain --- Reich, M.: Supplement to: ‘How many species of fossil holothurians are there? --- Thuy, B.; Gale, A. S.; Stöhr, S. & Wiese, F.: Shallow- water brittle-star (Echinodermata: Ophiuroidea) assemblages from the Aptian (Early Cretaceous) of the North Atlantic: first insights into bathymetric distribution patterns --- Hornung, J. J.: A new species of the barnacle genus Tesseropora (Crustacea: Cirripedia: Tetraclitidae) from the Early Pliocene of Fuerteventura (Canary Islands, Spain) --- Karl, H.-V.; Arp, G.; Siedersbeck, E. & Reitner, J.: A large ichthyosaur vertebra from the lower Kössen Formation (Upper Norian) of the Lahnewiesgraben near Garmisch-Partenkirchen, Germany
    Pages: Online-Ressource (197 Seiten)
    ISBN: 9783863951658
    Language: English
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  • 3
    Keywords: palaeobiology ; geobiology ; Earth history
    Description / Table of Contents: Exceptionally preserved fossils from Fossil Lagerstätten contribute greatly to resolving details on the history of life on Earth. For the first time, the “Paläontologische Gesellschaft” (PalGes) and the “Palaeontological Society of China” (PSC) combined forces to jointly present an international conference aimed to highlight and encourage the study of exceptionally well-preserved fossil sites worldwide. The conference focused on all aspects of palaeontology and geobiology, also incorporating related fields like biogeochemistry, biology, sedimentology and stratigraphy. The present volume contains the abstracts of more than 275 lectures and posters presented during the joint international conference “Palaeobiology & Geobiology of Fossil Lagerstätten through Earth History”. This year’s conference was held at the northern campus of the Georg-August University in Göttingen, Germany, from September 23-27, 2013. More than three hundred palaeontologists, biologists, geologists and other scientists and researchers from sixteen countries, mainly from Germany and the P. R. of China, participated.
    Pages: Online-Ressource (217 Seiten)
    ISBN: 9783863951351
    Language: English
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  • 4
    Keywords: land management ; Amazonia ; global change
    Description / Table of Contents: The Carbiocial Project investigates viable carbon-optimized land management strategies for maintaining tropical ecosystem services under land use change and changing climate conditions in Southern Amazonia – a hotspot of global change. The project aims at understanding the vital natural processes and socio-economic driving forces in the region and develops strategies to enhance and protect carbon stocks in the recently deforested agroscapes of Central/Northern Mato Grosso and South Pará. That is why Carbiocial analyzes and models soil, water and climate as well as agro-economics, social and political transformations. Based on detailed storylines, the project aims at identifying possible entry-points for a necessary change in local and regional production patterns, considering local livelihoods as well as the present national and global economic, legal and political situation. This book gives an overview of the first results of the multi-disciplinary Carbiocial Project by publishing the main presentations, held on the Carbiocial Status Conference, on October 7-8, 2013, in Cuiabá. In sixteen chapters the authors elucidate the project‘s current state of knowledge, illustrating adapted methods for regional modeling and promising strategies for the Amazon development. | Contents --- Stefan Hohnwald & Gerhard Gerold: Carbon-Optimized Land Management Research for the Southern Amazon-Geographical and Organizational Settings of the Carbiocial-Carbioma Project Consortium --- Philip M. Fearnside, Aurora M. Yanai & Claudia S. M. N. Vitel: Modeling Baselines for REDD Projects in Amazonia: Is the Carbon Real? --- Jens Boy, Charlotte Schumann, Simone Strey, Robert Strey, Georg Guggenberger & Regine Schönenberg: Digging Deeper – Biographic Interviews as a Promising Tool for the Joint Dissemination of Natural- and Social Science Results in REDD Contexts --- Carlos E. P. Cerri, Thalita F. Abbruzzini, Carolina B. Brandani, Mariana R. Durigan & Denise Signor: Soil Carbon Stocks and Greenhouse Gas Emissions from Agrosystems in Brazil --- Karl M. Wantzen, Malte Unger, Eduardo G. Couto, Ricardo S. S. Amorim, Karina P. Peña & Ulrich Irmler: Carbon Farming: Enriching Tropical Farm Soils with Organic Matter --- Alphonce C. Guzha, Ricardo S. S. Amorim, Rodolfo Nóbrega, Gabriele Lamparter, Kristof Kovacs, Norma Bertão & Gerhard Gerold: Impacts of Land Cover and Climate Change on Hydrology and Hydrochemistry in Selected Catchments in Southern Amazonia: Preliminary Analysis and Results --- Marcus Schindewolf, Daniela Schönke, Ricardo S. S. Amorim & Jürgen Schmidt: Effects of Contour Banks and No-Till Measures on Run-Off and Sediment Yield in Campo Verde Region, Mato Grosso --- Alessandra R. Gomes, César G. Diniz & Cláudio A. Almeida: Amazon Regional Center (INPE/CRA) Actions for Brazilian Amazon Forest: TerraClass and Capacity Building Projects --- Patrick Hostert, Tobia Lakes, Hannes Müller, Florian Gollnow & Letícia B. V. Hissa: Land-Use Monitoring and Change Detection --- Jürgen Böhner, Helge Dietrich, Klaus Fraedrich, Tobias Kawohl, Markus Kilian, Valerio Lucarini & Frank Lunkeit: Development and Implementation of a Hierarchical Model Chain for Modelling Regional Climate Variability and Climate Change Over Southern Amazonia --- Claas Nendel, Hermann Jungkunst & Adriano M. R. Figueiredo: Intercol and Steps Towards a Simplified DSS --- Neli A. de Mello-Théry & Paulo R. Cunha: Environmental Policies and Forest Code: Changes and Repercussions on the Agriculture in Mato Grosso --- Regine Schönenberg, Korbinian Hartberger & Charlotte Schumann: Challenges and Chances of Social Transformation for GHG-Optimized Land- and Natural Resource Management Strategies: Stakeholder-Dialogues as Prerequisite for the Elaboration of Applicable Results --- José H. Benatti & Luly R. da Cunha Fischer: Land Use Regulations in the State of Pará: An Introductory Approach of Its Guidelines --- Martin Coy, Michael Klingler, Matthias Siebold & Thomas Berger: Socio-Economic Regional Change and Agro-Economic Development Along the BR-163 --- Edna Castro: Deforestation Along the BR-163: Socio-Environmental Conflicts and Ignored Governmental Politics
    Pages: Online-Ressource (174 Seiten)
    ISBN: 9783863951382
    Language: English
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  • 5
    Description / Table of Contents: Echinoderms are a vast group of spiny-skinned animals including starfish, brittle-stars, sea urchins, sand dollars, feather stars, sea lilies and sea cucumbers. These relatives of chordates and hemichordates have inhabited the world’s oceans for more than 500 million years. Modern members of the Echinodermata are, with over 7 000 species, an integral part of marine communities from the intertidal to the deep sea. Echinoderms play a major ecological role in marine habitats and are of economic importance in fisheries, aquaculture and biomedicine. The present volume contains the abstracts of lectures and posters presented during the 7th European Conference on Echinoderms (ECE) as well as excursion guides. This year’s conference was held at the northern campus of the Georg-August University in Göttingen, Germany, from October 2-9, 2010. More than 100 biologists, palaeontologists and other scientists from 25 countries participated.
    Pages: Online-Ressource (145 Seiten)
    ISBN: 9783941875685
    Language: English
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  • 6
    Keywords: research data ; data ; information theory
    Description / Table of Contents: This study addresses the most important legal issues when implementing an open access e-infrastructure for research data. It examines the legal requirements for different kinds of usage of research data in an open access infrastructure, such as OpenAIREplus, which links them to publications. The existing legal framework regarding potentially relevant intellectual property (IP) rights is analysed from the general European perspective as well as from that of selected EU Member States. Various examples and usage scenarios are used to explain the scope of protection of the potentially relevant IP rights. In addition different licence models are analysed in order to identify the licence that is best suited to the aim of open access, especially in the context of the infrastructure of OpenAIREplus. Based on the outcomes of these analyses, some recommendations to the European legislator as well as data- and e-infrastructure providers are given on improving the rights situation in relation to research data.
    Pages: Online-Ressource (165 Seiten)
    ISBN: 9783863951474
    Language: English
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  • 7
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    Univ. Hamburg
    Publication Date: 2020-10-07
    Description: The main topic of this work is the introduction of time dependence into PHOENIX. This has been achieved for both the radiation field and the matter in the SN Ia model atmosphere. First, time dependence in the radiative transfer equation has been implemented. Two discretization schemes have been used for the implementation of the time derivative. Test calculations have been performed to confirm the correctness of the implementations. The radiation time scale computed with the time dependent radiative transfer is comparable to a simple analytic approach. Perturbations of the inner boundary condition of the atmosphere move through the whole atmosphere. For instance, an atmosphere with a sinusoidally varying inner light bulb leads to an atmosphere where the luminosity varies sinusoidally everywhere. For the next extension of time dependence for the matter, a simple hydrodynamical solver has been implemented. It computes the changes in the energy of an SN Ia atmosphere by considering the homologous expansion, energy transport and the deposition of energy by g -ray emission due to the radioactive decay of 56Ni and 56Co. Test calculations verified that each part of the solver works correctly. The energy deposition heats the atmosphere and increases the observed luminosity, whereas the adiabatic e expansion cools the atmosphere. The energy transport always pushes the temperature structure of the atmosphere towards the radiative equilibrium state ...
    Description: thesis
    Keywords: 523 ; THI 000 ; THU 162 ; Helligkeit von Sternen {Astronomie} ; Supernovae {Astronomie}
    Language: English
    Type: monograph , publishedVersion
    Format: 107 S.
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  • 8
    Publication Date: 2021-03-29
    Description: Spectro-astrometry is a technique to obtain information about the structure of an astronomical source on sub-diffraction limited spatial scales down to milli- or micro-arcseconds. The method exploits the shift of the photocentre of a structured source over emission/absorption lines in its spectral energy distribution. Sub-diffraction limited resolution can be achieved because the method only uses wavelength-differential information of longslit spectra. Although spectro-astrometry has already been devised by Bailey (1998) and some studies have been performed to date on different astronomic targets, so far, no systematic analysis of the potential of this technique has been undertaken. The aim of this work was to analyse the potential of the method, develop the tools to exploit this potential and write the software which is needed to perform the analysis procedure. To verify the practical feasibility, observations were done with the VLT/CRIRES facility to demonstrate the capabilities of the method with respect to detecting structures on giant star surfaces. All steps of data reduction were analysed with respect to their influence on the spectro-astrometric quantities and a new method for bad pixel detection was devised and implemented ...
    Description: thesis
    Keywords: 523 ; THT 600 ; THK 000 ; THT 400 ; Riesensterne {Astronomie} ; Spektren und Spektroskopie von Sternen {Astronomie} ; Kalte Sterne {Astronomie}
    Language: English
    Type: monograph , publishedVersion
    Format: 109 S.
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  • 9
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    Univ. Hamburg
    Publication Date: 2021-03-29
    Description: This thesis deals with the high-energy emission from young stellar objects, which are on the one hand still actively accreting from their disk, and on the other hand are no longer deeply obscured by their natal cloud. Stars of spectral type B and A are called Herbig Ae/Be (HAeBe) stars in this stage, all stars of later spectral type are termed classical T Tauri stars (CTTS); strictly speaking both types are defined by spectroscopic signatures, which are equivalent to the evolutionary stage described above. In this thesis CTTS and HAeBes are studied through high-resolution X-ray and UV spectroscopy and through detailed physical simulations. Spectroscopic X-ray data is reduced and presented for two targets: The CTTS V4046 Sgr was observed with Chandra for 100 ks, using a high-resolution grating spectrometer. The lightcurve contains one flare and the He-like triplets of Si XIII, Ne IX and O VII indicate high densities in the X-ray emitting regions. The second target is the HAeBe HD 163296, which was observed with XMM-Newton for 130 ks. The lightcurve shows only moderate variability, the elemental abundance follows a pattern, that is usual for active stars. The He-like triplet of O VII exhibits line ratios similar to coronal sources, indicating that neither a high density nor a strong UV-field is present in the region of the X-ray emission ...
    Description: thesis
    Keywords: 523 ; THP 000 ; Thermodynamische Vorgänge in Sternen {Astronomie}
    Language: English
    Type: monograph , publishedVersion
    Format: 84 S.
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  • 10
    Publication Date: 2021-03-29
    Description: Many stars evolve not alone but along one or more companions. While the evolution of single isolated stars is well predicted by theoretical calculations, close binary systems with their interactions are on the one hand far more difficult to handle, but on the other hand well constrained in their masses and sizes. One mechanism thought to produce such close binaries is the Common Envelope Evolution (CEE). Especially young post CEE binaries show great temperature differences between both components of about a factor 10 at a separation of just a few solar radii. This work focuses on close binary systems with a hot primary component (e.g. a subdwarf O-type star (sdO)) and a much cooler secondary component (e.g. a main-sequence star), which is heavily influenced by external radiation originating from the first. The technique to include external radiation into the stellar atmosphere code PHOENIX, i.e., the deviation of the outer boundary condition and the change in the temperature correction method, is described in detail. To concentrate on the irradiation effect, other difficulties such as asymmetric effects due to tear-drop shaped stars, ongoing mass accretion or shadows of a circumbinary disc, are avoided by selecting pre-cataclysmic variables (pre CVs) out of the class of close binaries as laboratory. The total eclipsing binary system UU~Sagittae is used as an example for massive irradiation and observed spectral features in the optical are fitted ...
    Description: thesis
    Keywords: 523 ; THK 000 ; THT 900 ; Spektren und Spektroskopie von Sternen {Astronomie} ; Doppelsterne {Astronomie}
    Language: English
    Type: monograph , publishedVersion
    Format: 100 S.
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