Hyperbolic metamaterials as an analog of a black body in the near-field
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Exploring the thermal expansion of fluorides and oxyfluorides with ReO3-type structures: from negative to positive thermal expansion
This thesis explores the thermal expansion and high pressure behavior of some materials with the ReO₃ structure type. This structure is simple and has, in principle, all of the features necessary for negative thermal expansion (NTE) arising from the transverse thermal motion of the bridging anions and the coupled rota…
Average path length for Sierpinski pentagon
In this paper,we investigate diameter and average path length(APL) of Sierpinski pentagon based on its recursive construction and self-similar structure.We find that the diameter of Sierpinski pentagon is just the shortest path lengths between two nodes of generation 0. Deriving and solving the linear homogenous recur…
Modellierung des thermo-mechanischen Verbundverhaltens von Asphalt in Straßenaufbauten
In der vorliegenden Arbeit wird ein Verbundmodell zur Beschreibung des thermo-mechanischen Verhaltens von Asphaltmischungen entwickelt und validiert. Das Modell beschreibt das Materialverhalten von Asphalt als Verbundwerkstoff auf Basis der Mischungstheorie. Hierfür ist das Verformungsverhalten der Bindemittelkomponen…
Charge Transfer and Support Effects in Heterogeneous Catalysis
The kinetic, electronic and spectroscopic properties of two-dimensional oxide-supported catalysts were investigated in order to understand the role of charge transfer in catalysis. Pt/TiO2 nanodiodes were fabricated and used as catalysts for hydrogen oxidation. During the reaction, the current through the diode, as we…
Reverse Monte Carlo study of apical Cu-O bond distortions in YBa2Cu3O6.93
A combination of neutron total scattering measurement and reverse Monte Carlo (RMC) refinement is applied to the study of apical Cu-O bond distortions in the high-Tc superconductor YBa2Cu3O6.93. We show that the average structure is not consistent with a split-site model for the corresponding Cu and O positions, but t…
Corrosion resistance of austenitic stainless steel in acetic acid solution containing bromide ions
In this research, the corrosion performance of two austenitic stainless steels,namely 316L and 254SMO, in concentrated acetic acid solutions containing bromide ions has been investigated. In this research, the influence of two different electrochemical surface treatments (electropolishing and nitric acid passivation)…
Modeling and control of Shape Memory Alloy Actuator.
This thesis propose a black box approach for the modeling and the control of SMA actuators, as an alternative to the usual phenomenological and physic models. Models using Laguerre functions are used due to their simplicity of implementation, their good convergence properties and the small amount of a prior knowledge…
Characterization of mass transfer by condensation on a horizontal plate
La réussite du développement de vols spatiaux de longue durée, ainsi que de l’établissement de stations permanentes nécessite des systèmes fermés autonomes bien contrôlés. L’optimisation d’une boucle fermée d’un système support vie bio-régénératif, impose le contrôle de l’hydrodynamique et des transferts de chaleur et…
Erratum: A life cycle framework for the investigation of environmentally benign nanoparticles and products [Phys. Status Solidi RRL 5, No. 9, 312–317 (2011)]
Abstract The name of a further author and contributor to this work, Roland Clift, has been added to the author list of the article in agreement with all co‐authors. It had been inadvertently omitted from the original version of the paper (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Anisotropic conductance at improper ferroelectric domain walls
Transition metal oxides hold great potential for the development of new device paradigms because of the field-tunable functionalities driven by their strong electronic correlations, combined with their earth abundance and environmental friendliness. Recently, the interfaces between transition-metal oxides have reveale…
Optimierung des Schneidprozesses und Prognose der relevanten Arbeitsgrößen bei der Gesteinszerstörung unter Berücksichtigung des Meißelverschleißes
Die Dissertation befasst sich mit der Optimierung des Schneidprozesses bei der Gesteinsgewinnung und der Erarbeitung eines Modells zur Prognose der relevanten Arbeitsgrößen unter Berücksichtigung der Abnutzung der Schneidwerkzeuge. Die Untersuchungen wurden mit Rundschaftmeißeln unterschiedlicher Verschleißzustände du…
RERTR-7 Irradiation Summary Report
The Reduced Enrichment for Research and Test Reactor (RERTR) experiment RERTR-7A, was designed to test several modified fuel designs to target fission densities representative of a peak low enriched uranium (LEU) burnup in excess of 90% U-235 at peak experiment power sufficient to generate a peak surface heat flux of…
Ductile damage characterization in Dual-Phase steels using X-ray tomography
As part of the current context of requiring ever more efficient grades of steels in terms of resistance to stress and to damage, the Dual-Phase steels (DP) present an acceptable strength/ductility compromise. It is nevertheless necessary to have a better understanding of the mechanisms leading to the fracture of such…
Materials Science of DNA
The field of materials science and technology has undergone revolutionary advances due to the development of novel analytical tools, functional materials, and multidisciplinary approaches to engineering. Additionally, theoretical predictions combined with increasingly improved models and computational capabilities are…
RERTR-8 Irradiation Summary Report
The Reduced Enrichment for Research and Test Reactor (RERTR) experiment RERTR-8, was designed to test monolithic mini-fuel plates fabricated via hot isostatic pressing (HIP), the effect of molybdenum (Mo) content on the monolithic fuel behavior, and the efficiency of ternary additions to dispersion fuel particles on t…
Marine Cosmeceuticals
Marine Cosmeceuticals: Trends and Prospects is a consolidated overview of the marine environment as a productive source of novel cosmeceuticals. It accumulates the latest research in this field from around the globe, highlighting the potential of marine micro and macro flora and fauna as effective agents for the devel…
Thermal properties of materials from ab-initio quasi-harmonic phonons
This paper gives a short overview of the calculation of thermal properties of materials from first principles, using the Quasi-Harmonic Approximation (QHA). We first introduce some of the thermal properties of interest and describe how they can be calculated in the framework of the QHA; then we briefly recall Density-…
Nanostructures and Nanomaterials via DNA-Based Self-Assembly
Nature builds biological materials and develops their functional pathways on nano (biomacromolecular) or micro (cellular) levels with superne spatial (structural) and temporal (process) controls, securing their roles in a living system. Humans often nd it hard to duplicate the structures and functions of such biomat…
DNA and Carbon-Based Nanomaterials: Preparation and Properties of Their Composites
One of the most inspiring confronts in modern science are fundamental studies and applications in association with those of molecular, inorganic, and biological material components in interdisciplinary research involving chemistry, physics, biology, materials science, and medicine. Biomolecules are of interest to a wi…