44 research outputs found
First sequence-confirmed case of infection with the new influenza A(H1N1) strain in Germany
Here, we report on the first sequence-confirmed case of infection with the new influenza A(H1N1) virus in Germany. Two direct contacts of the patient were laboratory-confirmed as cases and demonstrate a chain of direct human-to-human transmission
Design and realization of a sputter deposition system for the \textit{in situ-} and \textit{in operando-}use in polarized neutron reflectometry experiments
We report on the realization of a sputter deposition system for the in situ-
and in operando-use in polarized neutron reflectometry experiments. Starting
with the scientific requirements, which define the general design
considerations, the external limitations and boundaries imposed by the
available space at a neutron beamline and by the neutron and vacuum
compatibility of the used materials, are assessed. The relevant aspects are
then accounted for in the realization of our highly mobile deposition system,
which was designed with a focus on a quick and simple installation and
removability at the beamline. Apart from the general design, the in-vacuum
components, the auxiliary equipment and the remote control via a computer, as
well as relevant safety aspects are presented in detail.Comment: Submitted for publication in Nuclear Inst. and Methods in Physics
Research, A. (1st revised version
Electronic Correlations in Vanadium Revealed by Electron-Positron Annihilation Measurements
The electronic structure of vanadium measured by Angular Correlation of
electron-positron Annihilation Radiation (ACAR) is compared with the
predictions of the combined Density Functional and Dynamical Mean-Field Theory
(DMFT). Reconstructing the momentum density from five 2D projections we were
able to determine the full Fermi surface and found excellent agreement with the
DMFT calculations. In particular, we show that the local, dynamic self-energy
corrections contribute to the anisotropy of the momentum density and need to be
included to explain the experimental results
The semi-presidential system of Cape Verde: the relationship between the executive and the legislative powers = O sistema semi-presidencialista caboverdiano: a relação entre os poderes executivo e legislativo
e article analyses the relationship established between the executive
and legislative powers in the Cape Verdean government system
where researchers seek to understand it, taking into account their theoretical
and constitutional setting practice. It should be noted the prominence
of the debate and studies undertaken to understand how the scienti c
academy seeks to eradicate this problem. Two issues are relevant in this
debate: the rst reporting to the theoretical and constitutional con guration
of Cape Verdean government system and the other to its policy and
legislative practice.
Keywords: Cape Verde. Semi-presidential System. Systems of Government.
Legislative and Executive Powers.O artigo procura analisar a relação que se estabelece entre o poder
executivo e legislativo no sistema de governo cabo-verdiano, onde Investigadores
buscam compreendê-lo, tendo em conta a sua con guração
prática, teórica e constitucional. Há que realçar a proeminência do debate
e dos estudos realizados no sentido de compreender como Ă© que a academia
cientà ca procura debelar esta problemática. Duas questões são
pertinentes neste debate: a primeira refere-se à con guração teórico-constitucional
do sistema de governo cabo-verdiano e a outra Ă prática polĂtica
e legislativa.
Palavras-chave: Cabo Verde. Sistema Semi-presidencialista. Sistemas de Governo.
Poder legislativo e Poder Executivo
Spin-resolved fermi surface of the localized ferromagnetic Heusler compound Cu2MnAl measured with spin-polarized positron annihilation
We determined the bulk electronic structure in the prototypical Heusler
compound CuMnAl by measuring the Angular Correlation of Annihilation
Radiation (2D-ACAR) using spin-polarized positrons. To this end, a new
algorithm for reconstructing 3D densities from projections is introduced that
allows us to corroborate the excellent agreement between our electronic
structure calculations and the experimental data. The contribution of each
individual Fermi surface sheet to the magnetization was identified, and summed
to a total spin magnetic moment of
Texturgenerierung aus Punktrastern für 3D-Gebäudemodelle
Die vorliegende Bachelorarbeit beschäftigt sich mit der Texturgenerierung eines 3D-Stadtmodelles.
Dabei soll das Modell mit einem Punktraster angereichert werden, welches Informationen
einer im Vorfeld durchgeführten Sonneneinstrahlungsanalyse enthält. Ziel dieser Arbeit ist
die Erstellung eines Workflows, der aus dem bestehenden Punktraster durch Interpolationen
Rasterbilder mit einer höheren Auflösung erzeugt. Das Stadtmodell wird um diese erzeugten
Raster, in Form von Texturen, angereichert, wodurch der volle Informationsgehalt der Simulation
erhalten bleibt. Das gegebene Punktraster hat eine räumliche Auflösung von ein bis zwei
Meter. Durch die Reduktion der Flächeninformationen auf einzelne Punkte, kommt es zu einem
Informationsverlust auf der Gebäudeoberfläche, welcher durch die Erzeugung von Texturen
verhindert werden kann.
Für die Erzeugung dieses Workflows werden im Rahmen dieser Arbeit ausgewählte Interpolationsmethoden
in Hinblick auf ihre Funktionsweise und ihre Ergebnisse miteinander verglichen.
Zur Erzeugung des Rasterbildes wird schlieĂźlich jene Interpolationsart verwendet, die
sich durch die Gegenüberstellung als geeignet erwiesen hat. Des Weiteren ist zu klären, ob
die Interpolation in mehreren Teilschritten durchgefĂĽhrt werden soll, um Aliasingeffekte zu verhindern.
Abschließend soll zudem erörtert werden, wie sich die interpolierten Rasterbilder auf
die Gebäudeflächen in dem 3D-Stadtmodell aggregieren lassen