748 research outputs found
Determining neutralino parameters in Left-Right Supersymmetric Models
We report exact analytical expressions relating the fundamental parameters
describing the neutralino sector in the context of the left-right
supersymmetric model. The method used for such a effects is the projector
formalism deduced without take into account the Jarlskog's projector formulae.
Also, expressions for the neutralino masses and the neutralino mixing matrix
are determined . The results are compared with numerical and analytical ones
obtained in similar scenarios in the context of the minimal supersymmetric
standard model.Comment: 34 pages, 23 figure
Observations of Very High Energy Gamma-Rays during Moonlight and Twilight with the MAGIC Telescope
We study the capability of the MAGIC telescope to observe under moderate
moonlight. TeV gamma-ray signals from the Crab nebula were detected with the
MAGIC telescope during periods when the Moon was above the horizon and during
twilight. This was accomplished by increasing the trigger discriminator
thresholds. No change is necessary in the high voltage settings since the
camera PMTs were especially designed to avoid high currents. We characterize
the telescope performance by studying the effect of the moonlight on the
gamma-ray detection efficiency and sensitivity, as well as on the energy
threshold.Comment: Contribution to the 30th ICRC, Merida Mexico, July 2007 on behalf of
the MAGIC Collaboratio
Gamma-ray upper limits on magnetars with 6 years of Fermi-LAT observations
We report on the search for gamma-ray emission from 20 magnetars using 6
years of Fermi, Large Area Telescope (LAT) observations. No significant
evidence for gamma-ray emission from any of the currently-known magnetars is
found. We derived the most stringent upper limits to date on the 0.1--10 GeV
emission of Galactic magnetars, which are estimated between
erg s cm. Gamma-ray pulsations were
searched for the four magnetars having reliable ephemerides over the observing
period, but none were detected. On the other hand, we also studied the
gamma-ray morphology and spectra of seven Supernova Remnants associated or
adjacent to the magnetars.Comment: 22 pages, 4 figures, 2 tables, submitted to Ap
Digital Resilience: Harnessing the Power of the Collective for Language Preservation. A Success Story for Catalan
El creixement generalitzat de la intel·ligència artificial (IA) ha fet que les tecnologies de la llengua siguin més accessibles que mai i ha portat aquesta tecnologia a la nostra vida dià ria. Tanmateix, el desenvolupament accelerat de la tecnologia lingüÃstica comporta intrÃnsecament un biaix cap a una perspectiva anglocèntrica i eurocèntrica, que té com a resultat una representació i un reconeixement limitats de les llengües minoritzades. És ben sabut que la presència d’una llengua en lÃnia en garanteix la supervivència. En aquest article explorem la història d’èxit del català , una llengua minoritzada amb una comunitat activa en lÃnia, que ha establert les bases per al desenvolupament de les tecnologies de la llengua. La història d’èxit de la comunitat catalanoparlant demostra que les comunitats poden tenir un paper important en la supervivència i en l’evolució de les llengües minoritzades en l’era digital.The widespread growth of Artificial Intelligence (AI) has made language technology more accessible than ever before, bringing language technology into our daily lives. Nevertheless, the rapid development of language technology intrinsically carries a bias towards Anglo-centric and Euro-centric perspectives, leading to limited representation and recognition for minoritized languages. It is a fact that the online presence of a language ensures its survival. This article explores the success story of Catalan, a minoritized language with an active online community, which has laid the foundations for language technology development. The Catalan-speaking community’s success story demonstrates how communities can play a significant role in the survival and evolution of minoritized languages in the digital age
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