598 research outputs found
ONTOGENERATION: Reusing Domain and Linguistic Ontologies for Spanish Text Generation
A significant problem facing the reuse of ontologies is to make their content more widely accessible to any potential user. Wording all the information represented in an ontology is the best way to ease the retrieval and understanding of its contents. This article proposes a general approach to reuse domain and linguistic ontologies with natural language generation technology, describing a practical system for the generation of Spanish texts in the domain of chemical substances. For this purpose the following steps have been taken: (a) an ontology in the chemicals domain developed under the METHONTOLOGY framework and the Ontology Design Environment (ODE) has been taken as knowledge source; (b) the linguistic ontology GUM (Generalized Upper Model) used in other languages has been extended and modified for Spanish; (c) a Spanish grammar has been built following the systemic-functional model by using the KPML (Komet-Penman Multilingual) environment. As result, the final system named Ontogeneration permits the user to consult and retrieve all the information of the ontology in Spanish
A new application of reduced Rayleigh equations to electromagnetic wave scattering by two-dimensional randomly rough surfaces
The small perturbations method has been extensively used for waves scattering
by rough surfaces. The standard method developped by Rice is difficult to apply
when we consider second and third order of scattered fields as a function of
the surface height. Calculations can be greatly simplified with the use of
reduced Rayleigh equations, because one of the unknown fields can be
eliminated. We derive a new set of four reduced equations for the scattering
amplitudes, which are applied to the cases of a rough conducting surface, and
to a slab where one of the boundary is a rough surface. As in the
one-dimensional case, numerical simulations show the appearance of enhanced
backscattering for these structures.Comment: RevTeX 4 style, 38 pages, 16 figures, added references and comments
on the satellites peak
Ontogeneration: Arquitectura basada en ontologías para la generación de textos en castellano
En este trabajo se presenta Ontogeneration, una arquitectura para generar textos en castellano utilizando ontologías lingüísticas y de dominio con la tecnología KPML de generación de lenguaje natural. Además se ha construido un sistema que genera textos en castellano en el dominio de las sustancias químicas. Para alcanzar tales resultados, se han seguido los siguientes pasos: a) se ha tomado como fuente de conocimiento una ontología en el dominio químico construida usando la metodología de desarrollo de ontologías llamada METHONTOLOGY y el Entorno de Diseño de Ontologías (Ontology Design Environment: ODE), b) se ha extendido y modificado la ontología lingüística GUM (Generalized Upper Model) para el castellano, c) se ha construido una gramática para el castellano siguiendo el modelo sistémico-funcional usando el entorno KPML (Komet Penman Multilingual). Se consigue, así, que los contenidos almacenados en la ontología de dominio sean accesibles por usuarios legos en la materia
PERSEIA: a biomedical wireless sensor network to support healthcare delivery for the elderly and chronically Ill
Proceeding of: 28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2006. EMBS ´06, New York, Aug. 30 2006-Sept. 3, 2006This paper presents a system based on Ambient Intelligence (AmI) to foster home care monitoring of senior citizens and chronically ill patients. The most important fact addressed in this research is the development of non intrusive and easy to use sensing devices. According to this, medical tests do not need user collaboration to perform them, neither powering on and off the sensor, starting the measure, configuring communications, etc.This work was supported in part by the Spanish Comunidad de Madrid under Grant GR/SAL/0277/2004.Publicad
Temperature-Dependent Anisotropic Refractive Index in β-Ga2O3: Application in Interferometric Thermometers
An accurate knowledge of the optical properties of β-Ga2O3 is key to developing the full potential of this oxide for photonics applications. In particular, the dependence of these properties on temperature is still being studied. Optical micro- and nanocavities are promising for a wide range of applications. They can be created within microwires and nanowires via distributed Bragg reflectors (DBR), i.e., periodic patterns of the refractive index in dielectric materials, acting as tunable mirrors. In this work, the effect of temperature on the anisotropic refractive index of β-Ga2O3 n(λ,T) was analyzed with ellipsometry in a bulk crystal, and temperature-dependent dispersion relations were obtained, with them being fitted to Sellmeier formalism in the visible range. Micro-photoluminescence (μ-PL) spectroscopy of microcavities that developed within Cr-doped β-Ga2O3 nanowires shows the characteristic thermal shift of red–infrared Fabry–Perot optical resonances when excited with different laser powers. The origin of this shift is mainly related to the variation in the temperature of the refractive index. A comparison of these two experimental results was performed by finite-difference time-domain (FDTD) simulations, considering the exact morphology of the wires and the temperature-dependent, anisotropic refractive index. The shifts caused by temperature variations observed by μ-PL are similar, though slightly larger than those obtained with FDTD when implementing the n(λ,T) obtained with ellipsometry. The thermo-optic coefficient was calculated.This work was supported by MICINN projects (RTI2018-097195-B-I00, RTI2018-096918-B-C41, PID2021-122562NB-I00 and PID2021-123190OB-I00/AEI/10.13039/501100011033/FEDER, UE). The authors acknowledge the financial support of the excellence research network RED2018-102609-T by MINECO. The authors acknowledge the support from the Air Force Office of Scientific Research under Award No. FA8655-20-1-7013 (Program Manager: Ali Sayir). M.A.-O. acknowledges financial support from MICINN (FPU contract No. FPU15/01982) and thanks the Central Research Development Fund (CRDF) of the University of Bremen for funding (ZF04/2021). J.S.M. and J.J. were supported by the Air Force Office of Scientific Research under award number FA9550–21–1–0507, monitored by Dr. Ali Sayir. Any opinions, finding, and conclusions or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the United States Air Force
MANEJO DEL RIEGO Y ABONADO EN EL CULTIVO DE LA PATATA EN LA COSTA NOROESTE DE CÁDIZ
[ES] Desde el Sistema de Asistencia al Regante del Instituto de Investigación y Formación
Agraria y Pesquera de Andalucía (IFAPA) en el Centro de Chipiona (Cádiz), se está
desarrollando una labor de experimentación de cultivos hortícolas al aire libre. En esta línea
se están ensayando cultivos para evaluar la eficiencia del riego y abonado nitrogenado. El
objetivo final de estos ensayos es generar unas recomendaciones de riego y fertirrigación
útiles para el sector. El cultivo de la patata es un cultivo muy extendido en la zona de Costa
Noroeste de Andalucía, por su precocidad en la comarca. El objetivo general del ensayo es
determinar de todos los posibles manejos de riego y abonado, cual es la opción más
eficiente y más productiva. Para ello se ha utilizado tres dosis de riego, una sobre las
necesidades potenciales de agua, otra por encima y otra por debajo, la primera de ellas con
manejo dos métodos de riego: aspersión y goteo. Además cada una de estas estrategias
con dos dosis distintas de abonado. Y todo ello replicado en dos parcelas de distintos
suelos. El resultado general de todo el abanico de posibilidades ha sido que está muy
influenciado del tipo de suelo. Para un suelo más equilibrado el abonado determina mucho
más los buenos resultados y con dosis de riego más justas el del abonado es muy
determinante. Sin embargo en parcelas de suelo arenoso la dosis de riego en el rendimiento
es determinante, pero la variable abonado influye en menor medida en el rendimiento y
menos cuando la dosis de riego es más alta, induciéndose a regar con riegos con una mayor
frecuencia a la diaria.Salvatierra Bellido, B.; Márquez Ruiz, A.; Luque Sánchez, S.; Nieto Martínez, A.; Acosta Galán, J. (2015). MANEJO DEL RIEGO Y ABONADO EN EL CULTIVO DE LA PATATA EN LA COSTA NOROESTE DE CÁDIZ. En XXXIII CONGRESO NACIONAL DE RIEGOS. Valencia 16-18 junio de 2015. Editorial Universitat Politècnica de València. https://doi.org/10.4995/CNRiegos.2015.1506OC
Long-term immune response accompanies clinical outcomes in severe asthmatics treated with anti-IL-5/IL-5R biologics
This work was supported by ISCIII - Instituto de Salud Carlos III,
FIS (Fondo de Investigación Sanitaria - Spanish Health Research
Fund) grants PI21/00896 and FI19/00067; Ciber de Enfermedades
Respiratorias (CIBERES); SEAIC grants 22A07; BASEAS STUDY
(Basophils in EosinophilicAsthma) Study Code ESR-20-20764
AstraZeneca International; Comunidad de Madrid grant PEJ2021-AI_BMD-22320 and FEDER funds (Fondo Europeo de
Desarrollo Regiona
Radially extended kinematics and stellar populations of the massive ellipticals NGC1600, NGC4125 and NGC7619. Constraints on the outer dark halo density profile
We present high quality long slit spectra along the major and minor axes out
to 1.5-2 Re (14-22 kpc) of three bright elliptical galaxies (NGC1600, NGC4125,
NGC7619) obtained at the Hobby-Eberly Telescope (HET). We derive stellar
kinematic profiles and Lick/IDS indices (Hbeta, Mgb, Fe5015, Fe5270, Fe5335,
Fe5406). Moreover, for NGC4125 we derive gas kinematics and emission line
strengths. We model the absorption line strengths using Simple Stellar
Populations models that take into account the variation of [\alpha/Fe] and
derive ages, total metallicity and element abundances. Overall, we find that
the three galaxies have old and [\alpha/Fe] overabundant stellar populations
with no significant gradients. The metallicity is supersolar at the center with
a strong negative radial gradient. For NGC4125, several pieces of evidence
point to a recent dissipational merger event. We calculate the broad band color
profiles with the help of SSP models. All of the colors show sharp peaks at the
center of the galaxies, mainly caused by the metallicity gradients, and agree
well with the measured colors. Using the Schwarzschild's axisymmetric orbit
superposition technique, we model the stellar kinematics to constrain the dark
halos of the galaxies. We use the tight correlation between the Mgb strength
and local escape velocity to set limits on the extent of the halos by testing
different halo sizes. Logarithmic halos - cut at 60 kpc -minimize the overall
scatter of the Mgb-Vesc relation. Larger cutoff radii are found if the dark
matter density profile is decreasing more steeply at large radii.Comment: Accepted for publication in Astronomy and Astrophysic
Wigner function for twisted photons
A comprehensive theory of the Weyl-Wigner formalism for the canonical pair
angle-angular momentum is presented, with special emphasis in the implications
of rotational periodicity and angular-momentum discreteness.Comment: 6 pages, 4 figure
Sigma-1 Receptor Agonism Promotes Mechanical Allodynia After Priming the Nociceptive System with Capsaicin.
Sigma-1 receptor antagonists promote antinociception in several models of pain, but the effects of sigma-1 agonists on nociception (particularly when the nociceptive system is primed) are not so well characterized; therefore we evaluated the effects of sigma-1 agonists on pain under different experimental conditions. The systemic administration of the selective sigma-1 agonists (+)-pentazocine and PRE-084, as well as the nonselective sigma-1 agonist carbetapentane (used clinically as an antitussive drug), did not alter sensitivity to mechanical stimulation under baseline conditions. However, they greatly promoted secondary mechanical allodynia after priming the nociceptive system with capsaicin. These effects of sigma-1 agonists were consistent in terms potency with the affinities of these drugs for sigma-1 receptors, were reversed by sigma-1 antagonists, and were not observed in sigma-1 knockout mice, indicating that they are sigma-1-mediated. Repeated systemic treatment with PRE-084 induced proallodynic effects even 24 h after treatment completion, but only after the nociceptive system was primed. However, neither the presence of this drug in the organism nor changes in sigma-1 receptor expression in areas involved in pain processing explains its long-term effects, suggesting that sustained sigma-1 agonism induces plastic changes in the nociceptive system that promote nociception
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