Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 2665 for “"Publikationsserver"”.
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Konzeption von Dokumentenservern für Digitale Bibliotheken im Hinblick auf Langzeitarchivierung und Retrieval
Entwickelt wird ein Dokument Management System zur elektronischen, Client-Server-basierten Publikation und Langzeitarchivierung von Hochschulschriften für die Universitätsbibliothek Potsdam. Der zu konzipierende Dokumentenserver muss den bibliothekarischen Anforderungen im Hinblick auf die …
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Teamkomposition und ihr Einfluss auf den Erfolg von Gründerteams
This study examines the relationship between a set of entrepreneurial traits on the team level and venture success by analyzing the composition of task and teamwork-related traits of the team members. The sample consists of 119 student teams that competed in a business simulation. The findings show …
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Einspieluntersuchungen von Verbundwerkstoffen mit periodischer Mikrostruktur
In the present work, the shakedown behaviour of composite materials with periodic microstructure is investigated. For this, a general static shakedown theorem is given and proven taking into account the effects of limited linear kinematical hardening and plastic ductile damage. A general procedure …
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Sputtered tin oxide and titanium oxide thin films as alternative transparent conductive oxides
Alternative transparent conductive oxides to tin doped indium oxide have been investigated. In this work, antimony doped tin oxide and niobium doped titanium oxide have been studied with the aim to prepare transparent and conductive films. Antimony doped tin oxide and niobium doped titanium oxide …
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Thermal shock behaviour of different tungsten grades under varying conditions
Thermonuclear fusion power plants are a promising option to ensure the energy supply for future generations, but in many fields of research enormous challenges have to be faced. A major step on the way to the prototype fusion reactor DEMO will be ITER which is build in Cadarache, southern France. …
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Neuronale Korrelate der Vorhersage hierarchischer Stimulussequenzen
In daily life, we are enclosed by constantly changing structures. We perceive and learn to appreciate these so called stimulus sequences in order to appropriately adapt our behavior. For example, a step onto a moving escalator is exactly planned to avoid stumbling. But in case of an escalator not …
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Risikobewertung von gentechnisch verändertem Mais im Hinblick auf ausgewählte Schmetterlinge der Agarlandschaft
The cultivation of genetically engineered maize expressing lepidopteran-specific Bt proteins poses a potential risk for non-target butterflies. For a comprehensive environmental risk assessment (ERA) both hazard and exposure have to be considered. To assess hazard it is essential to determine the …
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Zum Trag- und Verformungsverhalten der Kopfbolzendübel von Stahlverbundträgern mit Vergussfugen
In many cases, the use of prefabricated concrete elements to establish the concrete boom of composite steel beams offers economic benefits in comparison to the use of cast-in-place concrete. The use of poured joints as composite joints is a simple and safe method to create a shear-resistant …
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Biocatalytic conversion of cellulose towards itaconic acid
Naturally occurring cellulose can be used as a renewable resource for the sustainable production of platform chemicals such as itaconic acid. The biocatalytic conversion of cellulose is a very promising approach due to its high selectivity, mild conditions, and low exergy loss. However, such …
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Sedimentary facies reconstruction and kinematic restoration of an Upper Permian tight gas field, north-western Germany
This study of a tight gas reservoir, located at ~4200 metres depth in the Upper Rotliegend II (Upper Permian) of north-western Germany, includes a geological framework model for the sedimentary facies distribution, which is strongly influenced by the structural grain. Research focused on …
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Uncertainty handling in mobile community information systems
Gegenwärtige mobile Informationssysteme für Praxis-Gemeinschaften (Community of Practice, CoP) verarbeiten gewaltige Mengen an Multimedia, bieten mannigfaltige Kommandos zum Verarbeiten von Multimedia und bedienen diverse Praxis-Gemeinschaften, die unterschiedliche mobile Geräte nutzen. Ungenaue …
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Characterization of an Upper Permian tight aas reservoir : a multidisciplinary, multiscale analysis from the Rotliegend, Northern Germany
This thesis describes a multidisciplinary, multiscale approach to the analysis of tight gas reservoirs. It focused initially on the facies architecture of a Permian tight gas field in the Southern Permian Basin (SPB), East Frisia, Northern Germany. To improve field development, 3D seismic data, …
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Enantioselective ring opening reactions catalysed by heterogenized metal salen complexes
Epoxides are important intermediates for the stereo controlled synthesis of complex organic enantioselective compounds. Their use has increased dramatically with the advent of practical asymmetric catalytic methods for their synthesis. In the early nineties, Jacobsen et al. designed the chiral …
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Charakterisierung von Acyl-CoA-Reduktasen
cDNA sequences encoding fatty acyl-CoA reductases were cloned from the uropygial glands of barn owl (Tyto alba), domestic chicken (Gallus gallus domesticus) and domestic goose (Anser anser domesticus). Heterologous expression studies in Saccharomyces cerevisiae showed that they encode membrane …
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Identifikation und Charakterisierung von Interaktionspartnern des Zystennierenproteins DZIP1L
Polycystic kidney diseases are the most common genetic disorders; the underlying pathomechanisms are incompletely understood so far. One of the involved in the formation of cystic kidneys genes is DZIP1L. DZIP1L has previously been identified in our group as a new gene for polycystic kidney disease …
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Comparative neuroanatomy of Mollusks and Nemerteans in the context of deep metazoan phylogeny
Despite the plenty of molecular phylogenetic studies that emerged in recent years the position of major animal clades within the phylogenetic tree is still controversial. Therefore, the field of neurophylogeny that links the morphology of the nervous system to early evolutionary events emerged as a …
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Polarisierte Photon- und geflavourte Lepton-Quantenboltzmanngleichungen im frühen Universum
Polarisation and Nongaussianity are expected to play a central role in future studies of the cosmic microwave background radiation. Polarisation can be split into a divergence-like E-mode and a curl-like B-mode, of which the later can only be induced by primordial gravitational waves (tensor …
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Denkformen des formalen Denkens : eine qualitative empirische Studie zur spezifischen Kognition von Studienanfängern im Fach Mathematik
The transition from elementary mathematics taught in schools and highschools to mathematics taught in universities is often problematic for first-year students. This is evident from high drop-out rates during the first academic year, for instance (cf. e.g. Dieter, M., Brugger, P., Schnelle, D., …
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Life Cycle Assessment der alterungsbedingten Umweltverträglichkeit biogener Hydraulik-Schmierstoffe
Biogenic hydraulic fluids, based on synthetic esters (categorie: HEES), have an excellent environmental profile in the unused state, so that they are typically classified into water hazard class 1 or as "not hazardous to water". During storage at room temperature and tribological application, …
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Exploiting wireless link dynamics
Efficient and reliable communication is the key to enable multihop wireless networks such as sensornets, meshnets and MANETs. Unlike wired networks, communication links in wireless networks are highly dynamic and pose additional challenges. Network protocols, besides establishing routing paths …
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