730 research outputs found
Derecho a la educación: conocer para defender
En el marco del proyecto de investigación se administró una entrevista voluntaria y anónima a estudiantes de segundo año de las carreras licenciatura en Trabajo Social y Tecnicatura en Acompañamiento Terapéutico con el propósito de conocer y comprender las experiencias educativas transitadas en la universidad en tiempos de educación remota y la educación presencial en este período pos pandemia en el que la universidad habilitó las actividades presenciales.Tales experiencias se interpretaron en clave de garantización o vulneración del derecho a la educación.Universidad Nacional de La Plat
Energy Spectrum of Bloch Electrons Under Checkerboard Field Modulations
Two-dimensional Bloch electrons in a uniform magnetic field exhibit complex
energy spectrum. When static electric and magnetic modulations with a
checkerboard pattern are superimposed on the uniform magnetic field, more
structures and symmetries of the spectra are found, due to the additional
adjustable parameters from the modulations. We give a comprehensive report on
these new symmetries. We have also found an electric-modulation induced energy
gap, whose magnitude is independent of the strength of either the uniform or
the modulated magnetic field. This study is applicable to experimentally
accessible systems and is related to the investigations on frustrated
antiferromagnetism.Comment: 8 pages, 6 figures (reduced in sizes), submitted to Phys. Rev.
Transverse depinning in strongly driven vortex lattices with disorder
Using numerical simulations we investigate the transverse depinning of moving
vortex lattices interacting with random disorder. We observe a finite
transverse depinning barrier for vortex lattices that are driven with high
longitudinal drives, when the vortex lattice is defect free and moving in
correlated 1D channels. The transverse barrier is reduced as the longitudinal
drive is decreased and defects appear in the vortex lattice, and the barrier
disappears in the plastic flow regime. At the transverse depinning transition,
the vortex lattice moves in a staircase pattern with a clear transverse
narrow-band voltage noise signature.Comment: 4 pages, 4 figure
SIOSE Andalucía, experiencia de integración y actualización de bases cartográficas multiescala
El objetivo de SIOSE en Andalucía ha sido la obtención de una base cartográfica de referencia a escala de detalle
1:10.000, escalable a 1:25.000, donde se sintetizan e integran tanto la información geométrica como la temática de
cartografías ya existentes (usos del territorio, SIGPAC, coberturas del suelo, información de comunidades fitosociológicas,
redes de comunicación, superficies húmedas, red hidrográfica, zonas de extracción, balsas, entramado urbano,
etc.) siguiendo un protocolo establecido para, posteriormente, actualizarla al año de referencia mediante fotointerpretación.
La integración de las diferentes cartografías se fundamentó en la definición de unos valores mínimos de
tolerancia, tanto de distancia entre líneas como de tamaño mínimo de superficie en función del uso asignado al polígono.
La generación de la cartografía a escala 1:25.000 se llevó a cabo a través de procesos automáticos de cambio
de modelo de datos, cambio de escala y eliminación de pasillos.
La inquietud de abordar la experiencia de SIOSE-Andalucía nace de la necesidad detectada desde hace tiempo de
tener una base de referencia que combine parámetros bióticos con elementos administrativos y el parcelario de la
propiedad.The aim of SIOSE in Andalucía has been obtaining a detailed scale 1:10.000 cartographic database of reference,
scalable to 1:25.000, where geometry and also thematic information of existing cartographies have been combined
and joined (land uses, SIGPAC, land covers, phytosociological plant communities, communication network, humid
areas, hydrographic network, extraction zones, irrigation pools, urban network, etc.) following an established protocol
for, afterwards, updating the cartography to the referred year using photo-interpretation. The integration of different
cartographies is based on the definition of minimum values of tolerance for the distance between lines as well as
minimum sizes of area, depending on the assigned land use to each polygon. The production of cartography
1:25.000 was carried out through automatic processes of data model converter, scale change and elimination of
narrowing polygons. The interest of tackling the experience of SIOSE-Andalucia is sprung from the detected necessity of having a resource
which combines biotic parameters with administrative elements and property divisions
Análisis de los componentes de rendimiento de Zeas mays consociado con Mucuna pruriens y Canavalia ensiformes en el noreste de la provincia de Corrientes
PosterEn el Noreste de Argentina, los cultivos tradicionales de renta, como el maíz (Zea mays), utilizan prácticas de manejo que generan impactos negativos sobre el recurso suelo. La labranza tadicional, la quema de rastrojo, barbechos cortos, contribuyen a la pérdida de nutrientes como procesos erosivos y aumento de la incidencia de malezas. Observando los impactos negativos de las prácticas citadas se plantea el objetivo de analizar los componentes de rendimiento del cultivo de maíz consociado con dos leguminosas.EEA Cerro AzulFil: Bubillo, Rosana Elizabeth. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cerro Azul; ArgentinaFil: Feltan, Rafael.Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cerro Azul; ArgentinaFil: Dominguez Muñóz, Martín Ceferino. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cerro Azul; ArgentinaFil: Guerrero, D.R. Universidad del Salvador; ArgentinaFil: Leo, M. Universidad del Salvador; Argentin
Actualización SIOSE en Andalucía 2009
Tras la finalización a finales de 2009 del proyecto SIOSE 2005 en Andalucía, se denota un alto grado de desactualización
de la cartografía, en especial para las funciones de apoyo a la gestión a las que en principio estaba destinada.
Es por ello que el lanzamiento de un nuevo proyecto de actualización de SIOSE a nivel estatal por parte de la
Dirección General del Instituto Geográfico Nacional es percibido como una oportunidad para actualizar asimismo la
base de referencia SIOSE Andalucía 1:10.000. Valiéndonos de la experiencia adquirida, se propone acometer una
actualización metodológica que participe de la hoja de ruta trazada en la primera versión en muchos aspectos (colaboración
entre Administraciones, uso de procedimientos técnicos desarrollados ex profeso, fotointerpretación descentralizada…),
mejorándola en otros. Además, para poder dotar a las bases de esta dimensión gerenciales imprescindible
que los plazos de ejecución no provoquen una brecha temporal que haga que las bases nazcan desactualizadas.
Por tanto, además de la optimización de los recursos económicos, tan escasos en estos momentos, hay que
procurar la maximización de la productividad, sin olvidar un elevado nivel de calidad de los productos finales, que
garantice la compleción y la veracidad de los datos ofrecidos.On accomplishing the Andalusian project SIOSE 2005 in late 2009, the cartography is perceived highly outdated,
especially regarding its suitability for management support, for which it was initially conceived. This is why the release
of an update project for SIOSE at national level, supported by Directorate General of the National Geographic
Institute, is seen as an opportunity for also updating de Andalusia’s SIOSE reference database on a 1:10.000 scale.
Leaning on the experience acquired to this point, we propose to tackle a methodological update that could be integrated
within the first release’s roadmap in many aspects (cooperation between administrations, use of specifically
developed technical procedures, decentralized photo interpretation…), but also improving it in many others. Moreover,
to be able to provide the databases with this managerial scope, it is essential that the implementation schedule
avoid time gaps causing them to be outdated on their very release. Therefore, as well as optimizing economic resources,
so limited for the time being, we have to focus on maximizing productivity, without neglecting a high-end
product quality guaranteeing comprehensiveness and veracity of the offered data
Functional bold MRI: advantages of the 3 T vs. the 1.5 T
We quantitatively evaluate the benefits of a higher field strength for functional
brain MRI (fMRI) based on the blood oxygenation level-dependent contrast. The 3-T
fMRI shows a higher sensitivity for the motor and somatosensory stimulation and
more specific localization in the grey substance. The 3-T fMRI detects additional
areas of activation with the motor paradigm
Dynamic Ordering and Transverse Depinning of a Driven Elastic String in a Disordered Media
We examine the dynamics of an elastic string interacting with quenched
disorder driven perpendicular and parallel to the string. We show that the
string is the most disordered at the depinning transition but with increasing
drive partial ordering is regained. For low drives the noise power is high and
we observe a 1/f^2 noise signature crossing over to a white noise character
with low power at higher drives. For the parallel driven moving string there is
a finite transverse critical depinning force with the depinning transition
occuring by the formation of running kinks.Comment: 4 pages, 4 postscript figure
Recommended from our members
EMBEDDING TEMPERATURE SENSORS WITH THE USE OF LASER-FOILPRINTING ADDITIVE MANUFACTURING
Laser foil printing (LFP) is a metal additive manufacturing (AM) process using laser-based
melting of metal foil technique. Using metal foils in AM has advantages over laser powder-feed
processes, allowing for efficient heat transfer and resolving the drawbacks of powder-based AM
such as potential powder inhalation health hazards, balling, spattering, and high powder costs. In
this study, we demonstrate the advantage of LFP for embedding sensors into structures using 304L
stainless-steel foil as the feed material and two different types of temperature sensors. The first
type is a resistance temperature detector (RTD) platinum sensor (Pt 100), and the second type is a
k-type thermocouple probe. A detailed study of the sensor embedment through LFP revealed that
the spot-welding scanning strategy significantly improves the product quality than conventional
line-welding scanning strategy. As a result of this study, the feasibility of fabricating functional
parts with embedded sensors using the LFP process is demonstrated.Mechanical Engineerin
Electromagnetic Probes
A review is presented of dilepton and real photon measurements in
relativistic heavy ion collisions over a very broad energy range from the low
energies of the BEVALAC up to the highest energies available at RHIC. The
dileptons cover the invariant mass range \mll = 0 - 2.5 GeV/c, i.e. the
continuum at low and intermediate masses and the light vector mesons, . The review includes also measurements of the light vector mesons
in elementary reactions.Comment: To be published in Landolt-Boernstein Volume 1-23A; 40 pages, 24
figures. Final version updated with small changes to the text, updated
references and updated figure
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