511 research outputs found
Brexit or Bremain? : evidence from bubble analysis
We applied the Johansen-Ledoit-Sornette (JLS) model to detect possible bubbles and crashes related to the Brexit/Bremain referendum scheduled for 23rd June 2016. Our implementation includes an enhanced model calibration using Genetic Algorithms. We selected a few historical financial series sensitive to the Brexit/Bremain scenario, representative of multiple asset classes. We found that equity and currency asset classes show no bubble signals, while rates, credit and real estate show super-exponential behaviour and instabilities typical of bubble regime. Our study suggests that, under the JLS model, equity and currency markets do not expect crashes or sharp rises following the referendum results. Instead, rates and credit markets consider the referendum a risky event, expecting either a Bremain scenario or a Brexit scenario edulcorated by central banks intervention. In the case of real estate, a crash is expected, but its relationship with the referendum results is unclear
An alternative search for the electron capture of Te-123
A search for the electron capture of Te-123 has been performed using CdZnTe
detectors. After a measuring time of 195 h no signal could be found resulting
in a lower half-life limt of yrs (95 % CL) for
this process. This clearly discriminates between existing experimental results
which differ by six orders of magnitude and our data are in strong favour of
the result with longer half-lifes.Comment: 2 pages, 2 eps-figures, reanalysis of data set
Changes in antimicrobial resistance of Escherichia coli causing urinary tract infections in hospitalized children
Conditions currently associated with erythema nodosum in Swiss children
A review was made of the 36 paediatric patients in whom the diagnosis of erythema nodosum had been established between 1977 and 1996 at the Department of Paediatrics, University of Bern, Switzerland. Infectious diseases were associated with erythema nodosum in 20 (including 10 streptococcal infections) and non-infectious inflammatory diseases in 8 patients. None of the 36 patients had tuberculosis or had been exposed to sulphonamides, phenytoin or hormonal contraceptives. There were eight patients in whom either the associated disease was not diagnosed, or there was no other disease. Conclusion Most cases of erythema nodosum are nowadays caused by non-mycobacterial infectious diseases or by non-infectious inflammatory disease
Quantum-to-Classical Transition in Cavity Quantum Electrodynamics
The quantum properties of electromagnetic, mechanical or other harmonic
oscillators can be revealed by investigating their strong coherent coupling to
a single quantum two level system in an approach known as cavity quantum
electrodynamics (QED). At temperatures much lower than the characteristic
energy level spacing the observation of vacuum Rabi oscillations or mode
splittings with one or a few quanta asserts the quantum nature of the
oscillator. Here, we study how the classical response of a cavity QED system
emerges from the quantum one when its thermal occupation -- or effective
temperature -- is raised gradually over 5 orders of magnitude. In this way we
explore in detail the continuous quantum-to-classical crossover and demonstrate
how to extract effective cavity field temperatures from both spectroscopic and
time-resolved vacuum Rabi measurements.Comment: revised version: improved analysis, 4 pages, 4 figures, hi-res
version available at http://qudev.ethz.ch/content/science/PubsPapers.htm
Sistema de produção da bandarra (Schizolobium amazonicum [Hub] Ducke) no Estado de Rondônia.
Produção de sementes; Produção de mudas; Plantio homogêneo; Regimes de manejo florestal para a bandarra; Pragas da bandarra.bitstream/item/96207/1/CPAF-AP-1998-Producao-Bandarra.pd
Measurements of the Correlation Function of a Microwave Frequency Single Photon Source
At optical frequencies the radiation produced by a source, such as a laser, a
black body or a single photon source, is frequently characterized by analyzing
the temporal correlations of emitted photons using single photon counters. At
microwave frequencies, however, there are no efficient single photon counters
yet. Instead, well developed linear amplifiers allow for efficient measurement
of the amplitude of an electromagnetic field. Here, we demonstrate how the
properties of a microwave single photon source can be characterized using
correlation measurements of the emitted radiation with such detectors. We also
demonstrate the cooling of a thermal field stored in a cavity, an effect which
we detect using a cross-correlation measurement of the radiation emitted at the
two ends of the cavity.Comment: 5 pages, 4 figure
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