Operational Gaussian Schmidt-Number Witnesses

The general class of Gaussian Schmidt-number witness operators for bipartite systems is studied. It is shown that any member of this class is reducible to a convex combination of two types of Gaussian operators using local operations and classical communications. This gives rise to a simple operational method, which is solely based on measurable covariance matrices of quantum states. Our method bridges the gap between theory and experiment of entanglement quantification. In particular, we certify lower bounds of the Schmidt number of squeezed thermal and phase-randomized squeezed vacuum states, as examples of Gaussian and non-Gaussian quantum states, respectively.Comment: 9 pages, 4 figure

A Detailed Derivation of the Sticky Price and Sticky Information New Keynesian DSGE Model

This paper aims at providing macroeconomists with a detailed exposition of the New Keynesian DSGE model. Both the sticky price version and the sticky information variant are derived mathematically. Moreover, we simulate the models, also including lagged terms in the sticky price version, and compare the implied impulse response functions. Finally, we present solution methods for DSGE models, and discuss three important theoretical assumptions.New Keynesian Model, Sticky Prices, Sticky Information, Solution Algorithms

Heating, ventilating and air-conditioning in energy-efficient buildings

Tato bakalářská práce se zabývá vytápěním, větráním a klimatizací energeticky úsporných budov. První část je věnována rešerši vhodných způsobů vytápění, větrání a klimatizace pro energeticky úsporné budovy. Druhá část práce je věnována zhodnocení vhodnosti těchto způsobů u rodinných a bytových domů a využití při jejich re-konstrukci.The bachelor’s thesis deals with heating, ventilating and air-conditioning in energy-efficient buildings. The first part of the thesis provides an overview of suitable met-hods of heating, ventilating and air-conditioning for energy-efficient buildings. The second part contains the evaluation of suitability of these methods in newly built fami-ly houses and apartment buildings and also in building energy retrofits.

Quorum Sensing inhibition to battle infectious diseases

Antibiotic crisis – Back to the startA famous quote of Charles Darwin reads: “It is not the strongest of the species that survives, not the most intelligent that survives. It is the one that is the most adaptable to change.” Every living creature is evolving, is adapting to changes of the environment, all the time. With the discovery of antibiotics physicians found, adapted and refined powerful compounds to efficiently kill bacteria. The overuse of antibiotics will eventually render the same useless, as we can observe already right now. Against all logic and warnings antibiotics are still being used carelessly and are expelled to the environment in large quantities. Quorum quenching (QQ) strategies with the acylase PvdQ could be an alternative or addition to conventional antibiotics. The goal of this treatment is to attenuate virulence factors and hinder the formation of biofilms. The clearance of the infection will be performed by the immune system of the host or with the help of antibacterial compounds. Applications of QQ enzymes could be the functionalization of various medical relevant surfaces to mediate anti biofilm properties. We demonstrated in this work that the QQ enzyme PvdQ has indeed the potential to be used against A. baumannii, and P. aeruginosa infections in vitro and in vivo. The potential of QQEs justifies to put more effort in research and refinement of this technique and eventually QQ treatment approaches could offer powerful tools to fight bacterial infections in the future

Prospect Theory and Inflation Perceptions - An Empirical Assessment

Building on the hypotheses of loss aversion with respect to price increases and availability of frequently bought goods, Brachinger (2006,2008) constructs an alternative index of perceived inflation (IPI), which can reproduce the jump in the measure for perceived inflation after the Euro introduction in Germany that was not observable in standard HICP inflation. We test the hypotheses of Prospect Theory with regard to households’ inflation perceptions underlying Brachinger’s IPI in a panel estimation for 12 European countries. There is evidence that perceptions react more strongly to ‘losses’ in inflation than to ‘gains’ before the Euro cash changeover, but not afterwards. Moreover, we find empirical support for the availability hypothesis, stating that frequently bought goods have a stronger influence on inflation perceptions than the overall price index.Inflation Perceptions, Prospect Theory, Dynamic Panel

Velocity enhancement by synchronization of magnetic domain walls

Magnetic domain walls are objects whose dynamics is inseparably connected to their structure. In this work we investigate magnetic bilayers, which are engineered such that a coupled pair of domain walls, one in each layer, is stabilized by a cooperation of Dzyaloshinskii-Moriya interaction and flux-closing mechanism. The dipolar field mediating the interaction between the two domain walls, links not only their position but also their structure. We show that this link has a direct impact on their magnetic field induced dynamics. We demonstrate that in such a system the coupling leads to an increased domain wall velocity with respect to single domain walls. Since the domain wall dynamics is observed in a precessional regime, the dynamics involves the synchronization between the two walls, to preserve the flux closure during motion. Properties of these coupled oscillating walls can be tuned by an additional in-plane magnetic field enabling a rich variety of states, from perfect synchronization to complete detuning