277 research outputs found
Minimal 3-loop neutrino mass models and charged lepton flavor violation
We study charged lepton flavor violation for the three most popular 3-loop
Majorana neutrino mass models. We call these models "minimal" since their
particle content correspond to the minimal sets for which genuine 3-loop models
can be constructed. In all the three minimal models the neutrino mass matrix is
proportional to some powers of Standard Model lepton masses, providing
additional suppression factors on top of the expected loop suppression. To
correctly explain neutrino masses, therefore large Yukawa couplings are needed
in these models. We calculate charged lepton flavor violating observables and
find that the three minimal models survive the current constraints only in very
narrow regions of their parameter spaces.Comment: 32+7 pages, 23 figures, 7 table
Escaping the Poverty Trap in Latin America: The Role of Family Factors
Much like an inherited trait, poverty trends to pass from parent to child. How prevalent is this "curse of the poor," why do some escape it, and how can we help improve the odds? This study sets out to gauge the extent of this "Intergenerational transmissHousehold behavior and family economics, education, welfare and poverty, urban, rural and regional economics, household analysis
Barbo cabecicorto – Luciobarbus microcephalus (Almaça, 1967)
Peces - Orden Cypriniformes - Familia Cyprinidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/.-- Versiones anteriores: 05-10-2010 (v1).A comprehensive review of the natural history
of the small-headed barbel Luciobarbus microcephalus in
Spain.Peer reviewe
A Concurrent Programming Language for Arduino and Educational Robotics
Arduino is currently one of the most popular platforms for educational robotics due to its low cost and large amount of available resources online. The Arduino software library provides an abstraction layer over the hardware details, making it possible for novices to build interesting projects. However, its lack of support for concurrency makes some educational robotics projects difficult. In this paper, we explore different approaches to solve this problem and we propose the implementation of a concurrent programming language supported by a virtual machine running on the Arduino board.XVI Workshop TecnologÃa Informática Aplicada en Educación (WTIAE).Red de Universidades con Carreras en Informática (RedUNCI
A Concurrent Programming Language for Arduino and Educational Robotics
Arduino is currently one of the most popular platforms for educational robotics due to its low cost and large amount of available resources online. The Arduino software library provides an abstraction layer over the hardware details, making it possible for novices to build interesting projects. However, its lack of support for concurrency makes some educational robotics projects difficult. In this paper, we explore different approaches to solve this problem and we propose the implementation of a concurrent programming language supported by a virtual machine running on the Arduino board.XVI Workshop TecnologÃa Informática Aplicada en Educación (WTIAE).Red de Universidades con Carreras en Informática (RedUNCI
Ingesta de gomas elásticas en Garcillas Bueyeras (Bubulcus ibis)
L'anà lisi de nombroses egagròpiles recollides en un dormider d'esplugabous proper a l'abocador de Badajoz i diverses observacions directes d'individus menjant en aquesta zona indiquen que l'espècie ingireix gran quantitat de gomes. Això s'interpreta per la similaritat entre les gomes i els cucs de terra
From Giant H II regions and H II galaxies to globular clusters and compact dwarf ellipticals
Massive starforming regions like Giant HII Regions (GHIIR) and HII Galaxies
(HIIG) are emission line systems ionized by compact young massive star clusters
(YMC) with masses ranging from M to M. We model the
photometric and dynamical evolution over a Hubble time of the massive
gravitationally bound systems that populate the tight relation between absolute
blue magnitude and velocity dispersion () of GHIIR and HIIG and
compare the resulting relation with that one of old stellar systems: globular
clusters, elliptical galaxies, bulges of spirals. After 12~Gyr of evolution
their position on the vs. M plane coincides -- depending on the
initial mass -- either with the globular clusters for systems with initial mass
M or with a continuation of the ellipticals, bulges of
spirals and ultracompact dwarfs for YMC with M. The slope
change in the and -size relations at cluster masses around
M is due to the larger impact of the dynamical evolution on the
lower mass clusters. We interpret our result as an indication that the YMC that
ionize GHIIR and HIIG can evolve to form globular clusters and ultra compact
dwarf ellipticals in about 12 Gyr so that present day globular clusters and
ultra compact dwarf ellipticals may have formed in conditions similar to those
observed in today GHIIR and HIIG.Comment: 11 pages, 6 figures, accepted for publication in MNRA
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