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392 documents, page 1 of 40

Eine molekulardynamische Studie von amorphem SiO2 im Bulk und unter geometrischen Einschränkungen

Geske, Julian (2017)
Wasser und Silica sind beides Flüssigkeiten, die von hoher Relevanz sowohl in Anwendungen als auch in der Theorie sind. Lebewesen bestehen zu großen Teilen aus Wasser. Nicht nur dort kommt Wasser räumlich eingeschränkt vor, sondern ebenso in Gesteinen. Silica hingegen ist der bekannteste Glasbildner und hat daher vielfache Anwendungsmöglichkeiten in der Herstellung von (optischen) Gläsern. Ferner zeigen Silica und Wasser auf atomarer Ebene einen ähnlichen Aufbau. Beide Flüssigkeiten besitz...

Investigation of a NKG2D-dependent tumor immune escape mechanism of head and neck squamous cell carcinoma and proof of concept of a clinical intervention strategy

Weil, Sandra (2017)
Natural killer cells are large granular lymphocytes of the innate immune system, which play an important role in the recognition and elimination of malignantly transformed and infected cells. The major activating NK cell receptor NKG2D, which is also expressed as co-stimulatory receptor on T cell subsets, is thereby a key modulator for tumor recognition and immune cell cytotoxicity. NKG2D recognizes several structurally related cellular ligands (MICA, MICB and ULBP1-6) commonly overexpressed ...

Synthesis and in-depth analysis of natural and engineered cystine-knot miniproteins

Reinwarth, Michael (2017)
In der hier vorgelgegten Arbeit wurde die Synthese und Analytik bekannter und sequenziell veränderter Varianten offenkettiger, inhibitorischer Miniproteine behandelt. Die Cysteinoxidation und der damit verbundenen Ausbildung sekundärer und tertiärer Strukturelemente von Mikroproteinen ist ein entscheidender Schritt der Synthese. Durch dessen Optimierung konnten mit hoher Ausbeute Cystinknoten verschiedener Aminosäuresequenzen synthetisiert werden. Daraus resultierend konnten neben Oligomerisi...

(Wie) Wollen wir automatisiert fahren?

Abendroth, Bettina; Auerswald, Rico; Bengler, Klaus; Bruder, Ralph; Eckert, Alfred; Enigk, Holger; Flemisch, Frank; Gasser, Tom-Michael; Heuser, Thomas; Kreutzburg-Sütterlin, Christin; Lauxmann, Ralph; Lenz, Barbara; Manstetten, Dietrich; Merkel, Nora; Müller, Andreas;... (2017)

Liquid Crystals Towards Terahertz: Characterisation and Tunable Waveguide Phase Shifters for Millimetre-Wave and Terahertz Beamsteering Antennas

Weickhmann, Christian (2017)
This thesis treats methods of characterisation of the anisotropic complex permittivity tensor of Liquid Crystals (LCs) from the microwave range up to the terahertz range, and the use thereof in a tunable waveguide phase shifter for a Ka band phased array antenna for space application. An overview of the relevant properties of LCs is presented and relevant concepts are introduced. The characterisation is carried out using two methods: a resonant cavity technique at 30 and 60 GHz, and transm...

Cold collisions of metastable neon atoms

Cop, Christian (2017)
In this thesis we investigate theoretically the cold collision properties of metastable neon (Ne*). The collisions of metastable rare gases (Rg*) exhibit a plethora of interesting phenomena: Due to the high internal excitation energies of the metastable atoms ionization processes are very likely. The produced ions can be detected with single-ion efficiency in the experiment. In experiments with atomic Rg* gases at cold temperatures T~1 mK, this allows for in-situ monitoring of the real-time d...

Indentation Size Effect: Analysis of Underlying Mechanisms in (001) oriented Strontium Titanate Single Crystal via Chemical Etching and EBSD

Javaid, Farhan (2017)
Many crystalline materials exhibit an indentation size effect (ISE), i.e., an intrinsic increase in hardness with decreasing indentation depths during indentation with geometrically self-similar indenters such as pyramids and cone. During indentation testing, the material underneath the indenter is heavily deformed, introducing strain gradients in the materials, causing high local dislocation densities. For better understanding the small-scale mechanical properties, in the present work, the 3...

A Multi-Stage Impact Assessment Method for Freight Transport Management Measures – The Example of Vietnamese Rice Production and Logistics

Nguyen Thi, Binh (2017)
The concept of freight transport management (FTM) is perceived as an aspect of traffic management that has a significant influence on freight transport. A review of relevant literature gives descriptions of numerous FTM measures. Multi-dimensional approaches to optimize freight transport, production and logistics processes should be considered when assessing the impacts of FTM measures. The assessment method utilised during the planning process stages for estimating these impacts should be ba...

Entwicklung einer auf Kennzahlen gestützten risikoorientierten Bewertungsmethode zur Rehabilitationsplanung des Verteilungssystems der FWF

Matthé, Maurice Julian (2017)
Zur Sicherstellung der hochwertigen und störungsfreien Trinkwasserversorgung auch für zukünftige Generationen sind Wasserversorgungsunternehmen dazu aufgefordert, den technisch guten Zustand der Versorgungssysteme aufrecht zu erhalten. Um dieser Aufgabe und den zunehmend komplexer werdenden Anforderungen in der Wasserwirtschaft gerecht zu werden, erstellt die Fernwasserversorgung Franken (FWF) die „FWF-Studie 2040“ zur Instandhaltungs- und Investitionsplanung der nächsten 20 Jahre. In diesem ...