Search results for "Cold"
showing 10 items of 660 documents
The 1-way on-line coupled atmospheric chemistry model system MECO(n) – Part 3: Meteorological evaluation of the on-line coupled system
2012
Abstract. Three detailed meteorological case studies are conducted with the global and regional atmospheric chemistry model system ECHAM5/MESSy(→COSMO/MESSy)n, shortly named MECO(n), in order to assess the general performance of the on-line coupling of the regional model COSMO to the global model ECHAM5. The cases are characterised by intense weather systems in Central Europe: an intense cold frontal passage in March 2010, a convective frontal event in July 2007, and the high impact winter storm "Kyrill" in January 2007. Simulations are performed with the new on-line-coupled model system and compared to classical, off-line COSMO hindcast simulations driven by ECMWF analyses. Precipitation o…
Preparation and characterization of brass-based coatings
2018
Cold Spray (CS) has been widely investigated owing to its high deposition efficiency and retention of the properties of starting materials. Thus, this process has shown obvious advantages over the fabrication of different copper-based deposits and its alloys over other techniques, such as electroplating, Laser Cladding or thermal spraying. As one of the main copper alloys, brass is implanted in the fields of architecture or industry. Nevertheless, nowadays it is clear that there is very little work on brass coatings, and they were mainly made by electroplating and any other deposition methods, which has severely limits their uses in many applications.This study was applied to develop the br…
Real- and redshift-space halo clustering in $f(R)$ cosmologies
2016
We present two-point correlation function statistics of the mass and the halos in the chameleon $f(R)$ modified gravity scenario using a series of large volume N-body simulations. Three distinct variations of $f(R)$ are considered (F4, F5 and F6) and compared to a fiducial $\Lambda$CDM model in the redshift range $z \in [0,1]$. We find that the matter clustering is indistinguishable for all models except for F4, which shows a significantly steeper slope. The ratio of the redshift- to real-space correlation function at scales $> 20 h^{-1} \mathrm{Mpc}$ agrees with the linear General Relativity (GR) Kaiser formula for the viable $f(R)$ models considered. We consider three halo populations cha…
Cold dark matter plus not-so-clumpy dark relics
2017
Various particle physics models suggest that, besides the (nearly) cold dark matter that accounts for current observations, additional but sub-dominant dark relics might exist. These could be warm, hot, or even contribute as dark radiation. We present here a comprehensive study of two-component dark matter scenarios, where the first component is assumed to be cold, and the second is a non-cold thermal relic. Considering the cases where the non-cold dark matter species could be either a fermion or a boson, we derive consistent upper limits on the non-cold dark relic energy density for a very large range of velocity dispersions, covering the entire range from dark radiation to cold dark matte…
Wavelet analysis of baryon acoustic structures in the galaxy distribution
2011
Baryon Acoustic Oscillations (BAO) are a feature imprinted in the density field by acoustic waves travelling in the plasma of the early universe. Their fixed scale can be used as a standard ruler to study the geometry of the universe. BAO have been previously detected using correlation functions and power spectra of the galaxy distribution. In this work, we present a new method for the detection of the real-space structures associated with this feature. These baryon acoustic structures are spherical shells with a relatively small density contrast, surrounding high density central regions. We design a specific wavelet adapted to the search for shells, and exploit the physics of the process b…
Cold-atom thermoelectrics
2013
Two coupled reservoirs of cold atoms can be used as a model system to study the thermoelectric effect. [Also see Report by Brantut et al. ]
Optomechanical Rydberg-atom excitation via dynamic Casimir-Polder coupling
2014
We study the optomechanical coupling of a oscillating effective mirror with a Rydberg atomic gas, mediated by the dynamical atom-mirror Casimir-Polder force. This coupling may produce a near-field resonant atomic excitation whose probability scales as $\propto (d^2\;a\;n^4\;t)^2/z_0^8$, where $z_0$ is the average atom-surface distance, $d$ the atomic dipole moment, $a$ the mirror's effective oscillation amplitude, $n$ the initial principal quantum number, and $t$ the time. We propose an experimental configuration to realize this system with a cold atom gas trapped at a distance $\sim 2\cdot10 \, \mu$m from a semiconductor substrate, whose dielectric constant is periodically driven by an ext…
Propaganda ‘Worth an Army’ : The Norwegian Labour Party, Haakon Lie and the transnational dissemination of Cold War propaganda, 1945–55
2019
Author's accepted manuscript (post-print). This is an Accepted Manuscript of an article published by Taylor & Francis in The International History Review on 02/06/2019, available online: http://www.tandfonline.com/10.1080/07075332.2019.1622586.
Conspiracy theories in Republican Italy: the Pellegrino Report to the Parliamentary Commission on Terrorism
2015
This article analyses the draft of the final report prepared by Senator Giovanni Pellegrino, who from 1994 to 2001 chaired the ‘Parliamentary Commission of Inquiry on terrorism in Italy and on the causes of the failure to identify those responsible for the massacres’. The document was completed in 1995 and attempted a general interpretation of the causes of the political violence that had been a major feature of the history of the Italian Republic up to that point. The report was closely connected with what is often described as the moment of the transition between Italy's ‘first’ and ‘second’ Republic and, in keeping with revisionist theories current at the time, attributed responsibility …
Caviar con Ron: 'Sdelano na Kube'
2015
En Caviar con Ron : ' Sdelano na Kube', Jacqueline Loss y Jose Manuel Prieto analizan la gama vasta de actitudes hacia lo sovietico -desde una minimizacion del impacto sovietico en Cuba a una expresion exagerada de gratitud hacia los “rusos”- que se han encontrado desde que comenzaron su colaboracion investigativa en 2004. Notan que las transformaciones en la memorializacion, de una negacion rotunda a una aceptacion actual que no dudarian de llamar entusiasta, fueron algo que no pudieron anticipar del todo cuando decidieron organizar el que puede considerarse el primer simposio internacional (2007) dedicado a estudiar el impacto del vinculo sovietico en Cuba y publicar el libro Caviar wit…