589 research outputs found
Combatting intimate partner violence: representations of social and healthcare personnel working with gender-based violence interventions
Intimate partner violence (IPV) has been declared a global epidemic by the World Health Organization. Although the attention paid to both the perpetrators and victims of gender-based violence has increased, scientific research is still lacking in regard to the representations of operators involved in interventions and management. Therefore, the following study explores how the representations of operators affect how gender violence can be managed and combatted through an ecological approach to this phenomenon, in addition to highlighting the roles of organizationallevel services and their cultural and symbolic substrates. In total, 35 health and social professionals were interviewed and textual materials were analyzed by thematic analysis. The evidence suggests that services contrasting gender-based violence utilize different representations and management approaches. The authors hope that these differences can become a resource, rather than a limitation, when combatting gender-based violence through the construction of more integrated networks and a greater dialogue among different services, in order to make interventions designed to combat gender-based violence more effective
Testing whether muon neutrino flavor mixing is maximal
The small difference between the survival probabilities of muon neutrino and
antineutrino beams, traveling through earth matter in a long baseline
experiment such as MINOS, is shown to be an important measure of any possible
deviation from maximality in the flavor mixing of those states.Comment: Some revision has been made in the experimental discussions with two
new figures replacing the old ones and a clarification of the accuracy of the
perturbative result has been included. This version will be published in
Physical Review Letters. Title changed as asked by the editors of Physical
Review Letter
Measurement of the two-photon absorption cross-section of liquid argon with a time projection chamber
This paper reports on laser-induced multiphoton ionization at 266 nm of
liquid argon in a time projection chamber (LAr TPC) detector. The electron
signal produced by the laser beam is a formidable tool for the calibration and
monitoring of next-generation large-mass LAr TPCs. The detector that we
designed and tested allowed us to measure the two-photon absorption
cross-section of LAr with unprecedented accuracy and precision:
sigma_ex=(1.24\pm 0.10stat \pm 0.30syst) 10^{-56} cm^4s{-1}.Comment: 15 pages, 9 figure
Background studies and shielding effects for the TPC detector of the CAST experiment
Sunset solar axions traversing the intense magnetic field of the CERN Axion
Solar Telescope (CAST) experiment may be detected in a Time Projection Chamber
(TPC) detector, as X-rays signals. These signals could be masked, however, by
the inhomogeneous background of materials in the experimental site. A detailed
analysis, based on the detector characteristics, the background radiation at
the CAST site, simulations and experimental results, has allowed us to design a
shielding which reduces the background level by a factor of ~4 compared to the
detector without shielding, depending on its position, in the energy range
between 1 and 10 keV. Moreover, this shielding has improved the homogeneity of
background measured by the TPC.Comment: 14 pages, 5 figures, accepted in New Journal of Physic
A prototype liquid Argon Time Projection Chamber for the study of UV laser multi-photonic ionization
This paper describes the design, realization and operation of a prototype
liquid Argon Time Projection Chamber (LAr TPC) detector dedicated to the
development of a novel online monitoring and calibration system exploiting UV
laser beams. In particular, the system is intended to measure the lifetime of
the primary ionization in LAr, in turn related to the LAr purity level. This
technique could be exploited by present and next generation large mass LAr TPCs
for which monitoring of the performance and calibration plays an important
role. Results from the first measurements are presented together with some
considerations and outlook.Comment: 26 pages, 27 figure
Low energy neutrino scattering measurements at future Spallation Source facilities
In the future several Spallation Source facilities will be available
worldwide. Spallation Sources produce large amount of neutrinos from
decay-at-rest muons and thus can be well adapted to accommodate
state-of-the-art neutrino experiments. In this paper low energy neutrino
scattering experiments that can be performed at such facilities are reviewed.
Estimation of expected event rates are given for several nuclei, electrons and
protons at a detector located close to the source. A neutrino program at
Spallation Sources comprises neutrino-nucleus cross section measurements
relevant for neutrino and core-collapse supernova physics, electroweak tests
and lepton-flavor violation searches.Comment: 12 pages, 4 figures, 5 table
First Year Physics at CNGS, presented at PAC09, Vancouver, Canada, 4-8 May 2009
The CNGS facility (CERN Neutrinos to Gran Sasso) aims at directly detecting νμ→ντ neutrino oscillations [1]. An intense νμ beam (1017 νμ per day) is generated at CERN and directed over 732 km towards the Gran Sasso National Laboratory, LNGS, in Italy, where two large and complex detectors, OPERA and ICARUS, are located. Having resolved successfully some initial issues that occurred since its commissioning in 2006, that will be briefly summarized here, the facility had its first complete year of physics with 1.78×10^19 protons extracted towards CNGS. The experiences gained in operating this 500 kW neutrino beam facility along with highlights of the beamperformance in 2008 are discussed
First Year of Physics at CNGS
The CNGS facility (CERN Neutrinos to Gran Sasso) aims at directly detecting νμ→ντ neutrino oscillations [1]. An intense νμ beam (1017 νμ per day) is generated at CERN and directed over 732 km towards the Gran Sasso National Laboratory, LNGS, in Italy, where two large and complex detectors, OPERA and ICARUS, are located. Having resolved successfully some initial issues that occurred since its commissioning in 2006, that will be briefly summarized here, the facility had its first complete year of physics with 1.78×1019 protons extracted towards CNGS. The experiences gained in operating this 500 kW neutrino beam facility along with highlights of the beam performance in 2008 are discussed
The Micromegas detector of the CAST experiment
A low background Micromegas detector has been operating in the CAST
experiment at CERN for the search of solar axions during the first phase of the
experiment (2002-2004). The detector, made out of low radioactivity materials,
operated efficiently and achieved a very low level of background rejection (5 x
10^-5 counts/keV/cm^2/s) without shielding.Comment: 13 pages, 12 figures and images, submitted to New Journal o
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