131,493 research outputs found
Improved holder protects crystal during high acceleration and impact
A plastic holder, which retains a crystal blank with standard silvered contacts sandwiched between two copper contacts, protects the crystal against vibration during high acceleration and impact
Micro-fabricated electromagnetic filters for millikelvin experiments
In this article we report on the design, fabrication and tests of
micro-fabricated broadband filters suitable for proper electromagnetic
thermalization of electrical lines connected to sensitive quantum electronics
experiments performed at dilution fridge temperatures. Compared to previous
such miniature filters, the new design improves on performance and reliability.
These filters can be packed in space-saving cases with either single or
multi-contact connectors. Measured performance in the accessible range compares
well to simulations. We use these simulations to discuss the effectiveness of
these filters for electromagnetic thermalization at 30 mK.Comment: Available at http://www-spht.cea.fr/articles/s06/03
Generalized Taylor and Generalized Calvo price and wage-setting: micro evidence with macro implications
The Generalized Calvo and the Generalized Taylor model of price and wage-setting are, unlike the standard Calvo and Taylor counterparts, exactly consistent with the distribution of durations observed in the data. Using price and wage micro-data from a major euro-area economy (France), we develop calibrated versions of these models. We assess the consequences for monetary policy transmission by embedding these calibrated models in a standard DSGE model. The Generalized Taylor model is found to help rationalizing the hump-shaped response of inflation, without resorting to the counterfactual assumption of systematic wage and price indexation.Contract length, steady state, hazard rate, Calvo, Taylor, wage-setting, price-setting.
Supercooled and glassy water: Metastable liquid(s), amorphous solid(s), and a no-man's land
We review the recent research on supercooled and glassy water, focusing
on the possible origins of its complex behavior. We stress the central
role played by the strong directionality of the water-water interaction
and by the competition between local energy, local entropy, and local
density. In this context we discuss the phenomenon of polyamorphism
(i.e., the existence of more than one disordered solid state),
emphasizing both the role of the preparation protocols and the
transformation between the different disordered ices. Finally, we
present the ongoing debate on the possibility of linking polyamorphism
with a liquid-liquid transition that could take place in the no-man's
land, the temperature-pressure window in which homogeneous nucleation
prevents the investigation of water in its metastable liquid form
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