114 search hits
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Jahresbericht 2006 - Universität Bayreuth Rechenzentrum
(2007)
- Universität Bayreuth Rechenzentrum Jahresbericht des Rechenzentrums
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Theoretical and Computation Basis for CATNETS - Annual Report Year 3
(2007)
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Daniel Veit
Georg Buss
Björn Schnizler
Dirk Neumann
Werner Streitberger
Torsten Eymann
- In this document the developments in defining the computational and theoretical framework for economical resource allocation are described. Accordingly the formal specification of the market mechanisms, bidding strategies of the involved agents and the integration of the market mechanisms into the simulator were refined.
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Documentation of reference data for the experimental areas of the Bayreuth Centre for Ecology and Environmental Research (BayCEER) at the Waldstein site
(2007)
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Katharina Staudt
Thomas Foken
- no abstract
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COPS experiment - Convective and orographically induced precipitation study, 01 June 2007 – 31 August 2007
(2007)
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Stefan Metzger
Thomas Foken
- no abstract
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The Arctic Turbulence Experiment 2006, Direct measurements of turbulent fluxes in the near surface environment at high latitudes applying the eddy-covariance method, Part 3
(2007)
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Johannes Lüers
Jörg Bareiss
- no abstract
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The Arctic Turbulence Experiment 2006, Direct measurements of turbulent fluxes in the near surface environment at high latitudes applying the eddy-covariance method, Part 2
(2007)
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Johannes Lüers
Jörg Bareiss
- no abstract
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The Arctic Turbulence Experiment 2006, Direct measurements of turbulent fluxes in the near surface environment at high latitudes applying the eddy-covariance method, Part 1
(2007)
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Johannes Lüers
Jörg Bareiss
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Ultraschallanemometer-Überprüfung im Windkanal der TU Dresden
(2007)
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Lukas Siebicke
Andrei Serafimovich
- keine Zusammenfassung
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"Kwa Raha Zangu" - Zu meinem Vergnügen. Modern Taarab: Aufführungspraxis und Bezüge zum Alltag
(2007)
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Stefanie Kolbusa
- In ihrer Dissertation beschäftigt sich Stefanie Kolbusa mit einem Musikgenre, genannt taarab. Taarab, zumeist auf Swahili gesungene Lieder, ist an der ostafrikanischen Küste weit verbreitet und hat eine lange (mindestens hundertjährige) Tradition. Der Fokus dieser Arbeit liegt auf dem modern taarab, einem rezenten Subgenre des taarab. Anliegen dieser Arbeit ist es, die bisher vorherrschende textliche Analyse von taarab-Liedern durch eine kontextuelle, auch Aufführungspraxis und kommunikative Funktion berücksichtigend, zu erweitern, um der breiten Bedeutungsvaribilität der Lieder gerecht zu werden. Vor allem soll damit die Bedeutung, die die Lieder für die Rezipienten haben, erfasst werden. Zudem sind die Texte der taarab-Lieder nie fix und können immer wieder nicht nur interpretiert, sondern auch mit anderer Bedeutung belegt werden. Da die Lieder Kommunikationsmedium sind, können sie nicht losgelöst vom Alltag der Akteure verstanden werden. Aus diesem Grund wird die Aufführungspraxis und der Bezug zum Alltag der Akteure betrachtet. Den theoretischen Hintergrund der Arbeit stellen daher Theorien über Performanz und populäre Kultur dar, die im Kontext dieser Arbeit auch theoretisch erweitert und fortgeführt werden. Diese werden angesichts der Resultate dieser Forschung erweitert.
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Structuring Descriptive Data of Organisms — Requirement Analysis and Information Models
(2007)
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Gregor Hagedorn
- Data that describe organisms in a structured form are indispensable not only for taxonomic and identification purposes, but also many phylogenetic, genetic, or ecological analyses. By analyzing existing information models and performing selected fundamental requirement analyses, the present work contributes to a broadening of the understanding of these forms of data. It falls into an interdisciplinary area between biology and information science. The term “descriptive data” is understood here in a broad sense: As descriptions of individuals, populations, or taxa, intended for various purposes (e. g., genetic, phylogenetic, diagnostic, taxonomic, or ecological), and covering a wide array of observation methods and data types (e. g., morphological, anatomical, genetic, physiological, molecular, or behavioral data). The position of descriptive data in the context of biodiversity framework concepts (covering, e. g., nomenclatural data, specimen collection data, or resource management) is discussed. A number of fundamental problems arise when modeling biological descriptive data. The ways in which existing data exchange formats, information models, and software applications address them are studied and future possible solutions are outlined. One such solution, the information model for the software “DiversityDescriptions (DeltaAccess)” is one of the results of this thesis and fully documented (Ch. 7). This entity relationship model fully supports the concepts of the traditional DELTA data exchange format (Description Language for Taxonomy; TDWG standard since 1986). If further improves on DELTA by introducing “modifiers” as a new terminology class, by introducing a more flexible system of handling statistical measures, by improving the handling of multilingual data sets, by supporting subset and filter features for concurrent collaborative editing (instead of supporting these for report-generation purposes alone), by supporting improved character attributes to create natural language descriptions from structured descriptions, and by adding metadata for a data set to improve the ability of data exchange without external documentation. In preparation of a future improved information model for descriptive data, the results of three requirement analyses are presented: a data-centric analysis of general concepts, a process-centric analysis of identification tools, and a high-level use case analysis. The first analysis (Ch. 4) is a structured inventory of fundamental approaches and problems involved in collecting and summarizing scientific descriptions of organisms. It is informed in part by current practices in information science, comparative data analysis, statistical, descriptive or phylogenetic software applications, and data exchange formats in biodiversity informatics. At the end three topics are discussed in particular detail (“Federation and modularization of terminology”, “Modifiers”, and “Secondary classification resulting in description scopes”). Except for phylogenetic analyses, identification is the most common usage of descriptive data. The second analysis (Ch. 5) therefore studies the processes, data structures, presentational and user interface requirements for printable and computer-aided identification tools (“keys”). Finally, a general use case analysis is performed with the goal of creating a framework of high-level use cases into which present as well as future requirements may be integrated (Ch. 6). All three requirement analyses are explorative and do not fulfill formal criteria of software engineering. They identify many requirements not addressed by the relational DiversityDescriptions model. Some of these could only be explored and await future solutions. For others solutions are proposed (some of which could already be incorporated into the design of SDD, an xml-based TDWG standard since 2005): The traditional data types are changed into an extensible character type model. The importance of data aggregation concepts was recognized to be fundamental. Complementary to data aggregation, the present and potentially future use of data inheritance along the lines of the taxonomic hierarchy is briefly studied. The concept of calculated characters could be addressed only insofar as the mapping between values can potentially be generalized. Character decomposition models are studied, but ultimately the traditional character concept, supplemented with a forest of ontologies for compositional and generalization concept hierarchies, is preferred as a more general concept. Both the traditional character subset and character applicability models can be integrated into concept hierarchies.
