Now showing items 281-289 of 289
On the relationship between the Method of Least Squares and Gram-Schmidt orthogonalization
The method of Least Squares is due to Carl Friedrich Gauss. The Gram-Schmidt orthogonalization method is of much younger date. A method for solving Least Squares Problems is developed which automatically results in the appearance of the Gram-Schmidt orthogonalizers. Given these orthogonalizers an induction-proof is available for solving Least Squares Problems.
Adsorption kinetic investigations of phthalocyanine derivatives self assembled monolayers (SAMs) on gold: Temperature influence on the SAM formation process and quality
The ordered nano-structured surfaces, like self-assembled monolayers (SAMs) are of a great scientific interest, due to the low cost, simplicity, and versatility of this method. SAMs found numerous of applications in molecular electronics, biochemistry and optical devices. Phthalocyanine (Pc) complexes are of particular interest for the SAM preparation. These molecules exhibit fascinating physical properties and are chemically and thermally stable. Moreover their complex structure is advantageous for the fabrication ...
Vesicle motion during sustained exocytosis in chromaffin cells
Chromaffin cells release catecholamines by exocytosis, a process that includes vesicle docking, priming and fusion. Although all these steps have been intensively studied, some aspects of their mechanisms, particularly those regarding vesicle transport to the active sites situated at the membrane, are still unclear. In this work, we show that it is possible to extract information on vesicle motion in Chromaffin cells from the combination of Langevin simulations and amperometric measurements. We developed a numerical ...
Exploiting non-Markovianity for quantum control
(Nature Publishing Group, 2015)
Quantum technology, exploiting entanglement and the wave nature of matter, relies on the ability to accurately control quantum systems. Quantum control is often compromised by the interaction of the system with its environment since this causes loss of amplitude and phase. However, when the dynamics of the open quantum system is non-Markovian, amplitude and phase flow not only from the system into the environment but also back. Interaction with the environment is then not necessarily detrimental. We show that the ...
The Navier-Stokes equations with time discretisation and Lagrangian approximation
In the present thesis, we combine the Navier-Stokes equations - which correspond to the so-called Eulerian representation of fluid flow - with the Lagrangian description of fluid flow.
Mechanistic Insights into the intrinsic Kinase Regulation of LRRK2
Obwohl Morbus Parkinson (PD) die zweithäufigste neurodegenerative Erkrankung darstellt, ist der Pathomechanismus kaum verstanden. Es ist jedoch erwiesen, dass PD assoziierte Mutationen die Aktivität der Leucine rich repeat kinase 2 (LRRK2) beeinflussen, sodass diese ein potentielles Drug Target darstellt. Für ein besseres Verständnis wurden daher der intrinsische regulatorische Mechanismus und der Einfluss von Mutationen auf LRRK2 untersucht. Zusätzlich wurde der Einfluss von Nanobodies gegen die ROC Domäne von LRRK2 ...
InP - based quantum dots for telecom wavelengths ranges
Long-distance quantum communication applications require sources of single photons, emitting at telecom wavelengths (around 1550 nm) with minimum attenu-ation losses of silica fiber. Semiconductor self-assembled InAs/InP-based quantum dots (QDs) are possible candidates to reach this spectral region. One of the challenges on the way is a QD asymmetry, which limits the fidelity of entangled photons. Therefore, morphological and optical properties of QDs should be improved in order to achieve the necessary quality and ...
Das Potential von Virtual Reality für das Lernen von Chemie an Schulen und Hochschulen
Das Potential von Virtual Reality für das Lehren und Lernen von Chemie an Schulen und Hochschulen wird dargelegt und diskutiert.
Virtual Reality in chemistry education and research
Description of a research project, which tries to realize a VR-game for learning chemistry on the macroscopic and on the microscopic level.