4,965 research outputs found
Dynamic simulations in SixTrack
The DYNK module allows element settings in SixTrack to be changed on a
turn-by-turn basis. This document contains a technical description of the DYNK
module in SixTrack. It is mainly intended for a developer or advanced user who
wants to modify the DYNK module, for example by adding more functions that can
be used to calculate new element settings, or to add support for new elements
that can be used with DYNK.Comment: Submission to CERN yellow report / conference proceeding, the 2015
collimation tracking code worksho
Recent results from the canfranc dark matter search with germanium detectors
Two germanium detectors are currently operating in the Canfranc Underground
Laboratory at 2450 m.w.e looking for WIMP dark matter. One is a 2 kg 76Ge IGEX
detector (RG-2) which has an energy threshold of 4 keV and a low-energy
background rate of about 0.3 c/keV/kg/day. The other is a small (234 g) natural
abundance Ge detector (COSME), of low energy threshold (2.5 keV) and an energy
resolution of 0.4 keV at 10 keV which is looking for WIMPs and for solar
axions. The analysis of 73 kg-days of data taken by COSME in a search for solar
axions via their photon Primakoff conversion and Bragg scattering in the Ge
crystal yields a 95% C.L. limit for the axion-photon coupling g < 2.8 10^-9
GeV^-1. These data, analyzed for WIMP searches provide an exclusion plot for
WIMP-nucleon spin-independent interaction which improves previous plots in the
low mass region. On the other hand, the exclusion plot derived from the 60
kg-days of data from the RG-2 IGEX detector improves the exclusion limits
derived from other ionization (non thermal) germanium detector experiments in
the region of WIMP masses from 30 to 100 GeV recently singled out by the
reported DAMA annual modulation effect.Comment: 6 pages, talk given at IDM2000, York, September 200
Testing balanced counseling to improve provider-client interaction in Guatemala\u27s MOH clinics
The job aids–assisted Balanced Counseling Strategy adopted by Guatemala’s Ministry of Health required specific instructions for use by nonprofessional providers and an intervention that assured provider compliance with the behavioral requirements of the new paradigm. Results show that the trained providers outperformed the controls in quality of care at each level of session length, but used nine extra minutes per session on average. Nonprofessional providers can take advantage of the job aids–assisted Balanced Counseling Algorithm and substantially improve their quality of care. Extra time invested in counseling new family planning clients will be easily absorbed insofar as they continue to represent a small portion of the total demand for services at the clinics
Status of IGEX dark matter search at Canfranc Underground Laboratory
One IGEX 76Ge double-beta decay detector is currently operating in the
Canfranc Underground Laboratory in a search for dark matter WIMPs, through the
Ge nuclear recoil produced by the WIMP elastic scattering. In this talk we
report on the on-going efforts to understand and eventually reject the
background at low energy. These efforts have led to the improvement of the
neutron shielding and to partial reduction of the background, but still the
remaining events are not totally identified. A tritium contamination or
muon-induced neutrons are considered as possible sources, simulations and
experimental test being still under progress. According to the success of this
study we comment the prospects of the experiment as well as those of its future
extension, the GEDEON dark matter experiment.Comment: 6 pages, 3 figures, talk given at 4th International Workshop on the
Identification of Dark Matter, York, September 200
The IGEX experiment revisited: a response to the critique of Klapdor-Kleingrothaus,Dietz, and Krivosheina
This paper is a response to the article "Critical View to" the IGEX
neutrinoless double-beta decay experiment..."published in Phys. Rev.D, Volume
65 (2002) 092007," by H.V.Klapdor-Kleingrothaus, A. Dietz, and I.V.Krivosheina,
published as preprint hep-ph/0403056. The criticisms are confronted, and the
questions raised are answered. We demonstrate that the lower limit quoted by
IGEX, for the half life of Ge-76 neutrinoless double beta decay, 1.57x10**25 y,
is correct and that there was no "arithmetical error"-as claimed in the "
Critical Review" article
Antimicrobial Peptides Pom-1 and Pom-2 from Pomacea poeyana Are Active against Candida auris, C. parapsilosis and C. albicans Biofilms
Recently two peptides isolated from the Cuban freshwater snail Pomacea poeyana (Pilsbry, 1927) were described to have antimicrobial activity against bacterial pathogens. Here we show considerable activities of Pom-1 and Pom-2 to reduce the viability of C. albicans, C. parapsilosis and the less common species C. auris measured as the decrease of metabolic activity in the resazurin reduction assay for planktonic cells. Although these activities were low, Pom-1 and Pom-2 turned out to be highly potent inhibitors of biofilm formation for the three Candida species tested. Whereas Pom-1 was slightly more active against C. albicans and C. parapsilosis as representatives of the more common Candida species Pom-2 showed no preference and was fully active also against biofilms of the more uncommon species C. auris. Pom-1 and Pom-2 may represent promising lead structures for the development of a classical peptide optimization strategy with the realistic aim to further increase antibiofilm properties and other pharmacologic parameters and to generate finally the first antifungal drug with a pronounced dedication against Candida biofilms
The Hubble PanCET program: Long-term chromospheric evolution and flaring activity of the M dwarf host GJ 3470
Neptune-size exoplanets seem particularly sensitive to atmospheric
evaporation, making it essential to characterize the stellar high-energy
radiation that drives this mechanism. This is particularly important with M
dwarfs, which emit a large and variable fraction of their luminosity in the UV
and can display strong flaring behavior. The warm Neptune GJ3470b, hosted by an
M2 dwarf, was found to harbor a giant hydrogen exosphere thanks to 3 transits
observed with the HST/STIS. Here we report on 3 additional transit observations
from the PanCET program, obtained with the HST/COS. These data confirm the
absorption signature from GJ3470b's exosphere in the stellar Ly-alpha line and
demonstrate its stability over time. No planetary signatures are detected in
other lines, setting a 3sigma limit on GJ3470b's FUV radius at 1.3x its Roche
lobe radius. We detect 3 flares from GJ3470. They show different spectral
energy distributions but peak consistently in the Si III line, which traces
intermediate-temperature layers in the transition region. These layers appear
to play a particular role in GJ3470's activity as emission lines that form at
lower or higher temperatures than Si III evolved differently over the long
term. Based on the measured emission lines, we derive synthetic XUV spectra for
the 6 observed quiescent phases, covering one year, as well as for the 3
flaring episodes. Our results suggest that most of GJ3470's quiescent
high-energy emission comes from the EUV domain, with flares amplifying the FUV
emission more strongly. The hydrogen photoionization lifetimes and mass loss
derived for GJ3470b show little variation over the epochs, in agreement with
the stability of the exosphere. Simulations informed by our XUV spectra are
required to understand the atmospheric structure and evolution of GJ3470b and
the role played by evaporation in the formation of the hot-Neptune desert.Comment: 21 pages, 18 figures, accepted in A&
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