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This work presents a single molecular motor driven by the current in an STM. Its chiral functional group is supposed to perform a rotation in a preferred direction, proven by Binomial tests to be statistically significant.
The rotation is proposedly driven by the chiral-induced spin selectivity effect (CISS). However, the studies of the rotation on the dependence on the lateral tip position, voltage and current indicate that he CISS is unlikely to cause the preferred rotation direction.
Umfang: II, 148 S.
Preis: 49.00 €
Buchdetails
Construction industry is suffering from low productivity rate in various projects such as excavation. Although this issue is discussed in literature and several approaches are proposed to address it, productivity rate is still low in construction industry compared to other domains like manufacturing.
A gamified platform in which different operators from different organizations can share their achievements, or can get scored and ranked in a leader-board will potentially address this issue.
Umfang: XXIII, 229 S.
Preis: 46.00 €
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This work considers dampers that do not solely focus on a single strategy but instead combine them. The capabilities of conventional dry friction dampers are expanded by taking into account piecewise defined contact geometries. This leads to friction dampers that change their behavior depending on the amplitude of the oscillations. The vibration damping device in this work, introduces damping at high oscillation amplitudes and takes advantage of absorption at low oscillation amplitudes.
Umfang: X, 155 S.
Preis: 45.00 €
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The transport of bacteria in turbulent river-like environments is addressed, where bacterial populations are frequently encountered attached to solids. This transport mode is investigated by studying the transient settling of heavy particles in turbulent channel flows featuring sediment beds. A numerical method is used to fully resolve turbulence and finite-size particles, which enables the assessment of the complex interplay between flow structures, suspended solids and river sediment.
Umfang: XV, 258 S.
Preis: 51.00 €
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In the last decades, superconducting devices have emerged as a promising platform for quantum technologies, including quantum sensing and quantum computing. Their key elements are Josephson junctions, which allow for coherent supercurrent tunneling between two weakly linked superconductors. If such a junction is extended in one direction to a long junction, the superconducting phase difference can vary in space and time and may allow for quantized phase windings that drive supercurrent vortices.
Umfang: II, 145 S.
Preis: 45.00 €
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Hohe Spröd-duktil-Übergangstemperaturen schließen den Einsatz von konventionell gefertigtem Wolfram (W) als Strukturwerkstoff aus. Ultrafeinkörnige (UFG) W-Werkstoffe zeigen jedoch den Spröd-duktil-Übergang bereits bei sehr tiefen Temperaturen und weisen folglich Raumtemperaturduktilität auf. Die korrelative Mikrostrukturanalyse offenbarte einen starken Zusammenhang zwischen der Übergangstemperatur und dem mittleren Korngrenzenabstand entlang der Rissfront.
High brittle-ductile transition temperatures preclude the use of conventionally manufactured tungsten (W) as a structural material. Ultrafine grained (UFG) W materials, however, exhibit the brittle-ductile transition at very low temperatures and consequently exhibit room-temperature ductility. The correlative microstructure analysis revealed a strong correlation between the transition temperature and the mean grain boundary spacing along the crack front.
Umfang: XV, 355 S.
Preis: 45.00 €
Buchdetails
We investigate deep material networks (DMN). We lay the mathematical foundation of DMNs and present a novel DMN formulation, which is characterized by a reduced number of degrees of freedom. We present a efficient solution technique for nonlinear DMNs to accelerate complex two-scale simulations with minimal computational effort. A new interpolation technique is presented enabling the consideration of fluctuating microstructure characteristics in macroscopic simulations.
Umfang: XI, 297 S.
Preis: 42.00 €
Buchdetails
Radar target simulators (RTSs) deceive a radar under test (RuT) by creating an artificial environment consisting of virtual radar targets. In this work, new techniques are presented that overcome the rasterization deficiency of current RTS systems and enable the generation of virtual targets at arbitrary high-precision positions. This allows for continuous movement of the targets and thus a more credible simulation environment.
Umfang: XIX, 153 S.
Preis: 41.00 €
Buchdetails
The advantages offered by the flexible electronics and control systems technologies were utilized for tackling the challenges facing two crucial Magnetic Resonance (MR) applications. The first application is in the field of interventional Magnetic Resonance Imaging (MRI), and the other application is in the field of Nuclear Magnetic Resonance spectroscopy (NMR).
Umfang: XV, 244 S.
Preis: 47.00 €
Buchdetails
Mit der Einführung hoch automatisierter Assistenzsysteme in Personenkraftwagen nehmen die Anforderungen an die Zuverlässigkeit der elektrischen Energieversorgung deutlich zu. In dieser Arbeit wird eine Methode zur Bewertung der Zuverlässigkeit der elektrischen Energieversorgung in der automobilen Vorentwicklung vorgestellt und angewendet. Als Ergebnis konnte gezeigt werden, dass die klassische elektrische Energieversorgung nicht zur Versorgung hoch automatisierter Assistenzsysteme geeignet ist.
With the introduction of highly automated assistance systems in passenger cars, the requirements for the reliability of the electrical power supply increase significantly. In this thesis, a method for evaluating the reliability of the electrical power supply in automotive pre-development is presented and applied. As a result, it could be shown that the classical electrical power supply is not suitable for supplying highly automated assistance systems.
Umfang: XIX, 299 S.
Preis: 46.00 €
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