oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 167 )

2018 ( 325 )

2017 ( 300 )

2016 ( 464 )

Custom range...

Search Results: 1 - 10 of 301151 matches for " Federico J. Soria "
All listed articles are free for downloading (OA Articles)
Page 1 /301151
Display every page Item
Evaluación de los datos del sensor ASTER para estimar la superficie cultivada y los niveles de producción de ca a de azúcar en Tucumán, Argentina An evaluation of ASTER data to estimate sugarcane planted area and production levels in Tucumán, Argentina
Federico J. Soria,Carmina Fandos,Jorge Scandaliaris,Miguel Morandini
Revista Industrial y Agrícola de Tucumán , 2007,
Abstract: En este trabajo se evalúa la capacidad de los datos de las bandas espectrales 2 y 3 del subsistema VNIR (Visible Near Infrared) y la banda espectral 4 del subsistema SWIR (Short Wave Infrared) del sensor ASTER, para estimar la superficie cultivada y los niveles de producción de ca a de azúcar en un área ubicada en el departamento Chicligasta de la provincia de Tucumán, Argentina. Se aplicó la metodología de clasificación multiespectral supervisada. Los resultados obtenidos fueron comparados con los generados con igual metodología utilizando los datos de las bandas 3, 4 y 5 del sensor TM del satélite Landsat 5. El análisis estadístico de la información disponible demostró que los datos del sensor ASTER, en sus bandas 2 y 3 del VNIR, poseen la capacidad de discriminar la superficie y los niveles de producción de ca a de azúcar en el área de estudio. De la comparación estadística de estos resultados con los de la imagen Landsat, resulta que la banda 3 de ASTER y 4 de Landsat poseen una significancia mayor para discriminar niveles de producción, que las bandas 2 y 3 de los respectivos sensores. Ante estos resultados, el sensor ASTER se muestra como una alternativa viable para la discriminación y cuantificación de la ca a de azúcar. In this work, data obtained by Visible Near Infrared (VNIR) bands 2 and 3 and Short Wave Infrared (SWIR) subsystem (band 4) of the ASTER sensor, were evaluated in terms of their potential use in estimating planted surface and production levels of a sugarcane growing area in Chicligasta, province of Tucumán, Argentina. The multiespectral supervised classification methodology was applied. The results were compared with the ones obtained by applying the same methodology to data provided by bands 3, 4 and 5 of Landsat 5 satellite TM sensor. Statistical analysis of the available information demonstrated that data supplied by VNIR bands 2 and 3 of the ASTER sensor allow discriminating sugarcane planted area and production levels in the region under observation. The statistical comparison of these results with the ones obtained with Landsat TM sensor indicated that band 3 of ASTER and band 4 of Landsat have a higher significance than bands 2 and 3 of both sensors for discriminating production levels. Moreover, by comparing them, it was possible to observe that band 3 of ASTER exhibited a better behaviour than band 4 of Landsat. These results show that the ASTER sensor constitutes a feasible alternative to identify and quantify sugarcane production.
Evaluación de los datos del sensor ASTER para estimar la superficie cultivada y los niveles de producción de ca?a de azúcar en Tucumán, Argentina
Soria,Federico J.; Fandos,Carmina; Scandaliaris,Jorge; Morandini,Miguel; Pérez,Daniela R.;
Revista industrial y agr?-cola de Tucum??n , 2007,
Abstract: in this work, data obtained by visible near infrared (vnir) bands 2 and 3 and short wave infrared (swir) subsystem (band 4) of the aster sensor, were evaluated in terms of their potential use in estimating planted surface and production levels of a sugarcane growing area in chicligasta, province of tucumán, argentina. the multiespectral supervised classification methodology was applied. the results were compared with the ones obtained by applying the same methodology to data provided by bands 3, 4 and 5 of landsat 5 satellite tm sensor. statistical analysis of the available information demonstrated that data supplied by vnir bands 2 and 3 of the aster sensor allow discriminating sugarcane planted area and production levels in the region under observation. the statistical comparison of these results with the ones obtained with landsat tm sensor indicated that band 3 of aster and band 4 of landsat have a higher significance than bands 2 and 3 of both sensors for discriminating production levels. moreover, by comparing them, it was possible to observe that band 3 of aster exhibited a better behaviour than band 4 of landsat. these results show that the aster sensor constitutes a feasible alternative to identify and quantify sugarcane production.
Rocas volcanoclasticas submarinas de edad Burdigaliense inferior en el sector del Mencal (Zona Subbetica, Cordillera Bética central). Contexto sedimentario y tectónico
Soria, J. M.
Estudios Geologicos , 1994, DOI: 10.3989/egeol.94503-4315
Abstract: This paper discuss the petrologic features of volcaniclastic rocks and its geodynamic implications. This rocks are included in the pelagic marine sediments of lower Burdigalian from the Río Fardes region (Subbetic Zone, Betic Cordillera). There are two different kinds of volcaniclastic rocks: vitric and feldspathic sandstones, and vitric siltstones, both of them from fragmental volcanic emissions of a calc-alkaline rhyodacitic magma. In these rocks there are planktonic Foraminifera that indicate volcanism occurring in a submarine environment. The emission focus is placed close to the present-day location of these rocks, due to low dispersion of the pyroclastic fragments into the pelagic marine deposits. During lower Burdigalian several N70 oE strike-slip faults was working simultanously with the pelagic marine sedimentation. In this paper it is assumed that these faults are connected with the volcanic activity. During the lower Miocene the orogenic deformation of the Sudiberian PaJeomargin (External Betic Zones) are related to fracturarion and volcanism, in coincidence with a major tectonic event, best known as Burdigalian Paroxysm (Hermes, 1985). El presente trabajo se centra en la caracterización petrológica y significado geodinámico de las rocas volcanoclásticas que aparecen en los materiales marinos pelágicos del Burdigaliense inferior que afloran en el sector del Mencal (Zona Subbética del tercio central de la Cordillera Bética). Se diferencian dos tipos de rocas volcanoclásticas: areniscas vítricas y feldespáticas y limolitas vítricas, ambas procedentes de emisiones volcánicas fragmentales de un magma calcoalcalino-riodacítico. En los dos tipos se encuentran foraminíferos planctónicos, hecho que indica que el volcanismo se produjo en condiciones submarinas. La escasa dispersión de los piroclastos dentro de los depósitos marinos pelágicos permite deducir que el foco de emisión volcánica se localizó muy próximo al lugar de emplazamiento de estas rocas. Uno de los rasgos más característicos del área estudiada es la existencia de fracturas de desgarre N70 oE que actuaron durante el Burdigaliense inferior. Estas fracturas son contemporáneas a la sedimentación marina pelágica en la que se registran las emisiones volcánicas. Se plantea como hipótesis una relación del volcanismo con la actuación de tales fracturas. Ambos procesos, volcanismo y fracturación, se interpretan en el contexto de deformación orogénica del Paleomargen Sudibérico durante el Mioceno inferior, en coincidencia con el climax de una fase tectónica mayor definido como Paroxismo Burdigal
Evolución sedimentaria y paleogeográfica durante el Mioceno superior en el borde Norte de la Cuenca de Guadix, Cordillera Bética Central
Soria Mingorance, J. M.
Estudios Geologicos , 1994, DOI: 10.3989/egeol.94501-2308
Abstract: The sequence stratigraphy of the upper Miocene in the northern border of the Guadix basin allows to separate four depositional sequences. These records succesive sedimentary and paleogeographic episodes in the evolution of the studied area. The first depositional sequence (lower and upper Tortonian. pro parte) represent the shelf and slope marine sedimentation on the southern edge of the North-betic Strait. The two following sequences (upper Tortonian). with plattform and pelagic basin environments. are deposited within the marine Guadix basin. The last sequence (upper Turolian-Ventian) is recorded by alluvial deposits after the continentalization of the Guadix basin. La aplicación de la estratigrafía secuencial al registro estratigráfico del Mioceno superior en el borde Norte de la Cuenca de Guadix ha permitido separar cuatro secuencias deposicionales. Estas representan sucesivos momentos en la evolución sedimentaria y paleogeográfica del área estudiada. La primera secuencia deposicional (Tortoniense inferior y superior pro parte) representa la sedimentación en el margen meridional del Estrecho Norbético. en condiciones de plataforma marina y de talud. Las dos siguientes (Tortoniense superior) se depositaron en el ámbito de la Cuenca de Guadix. con ambientes marinos de plataforma somera y de cuenca pelágica. La cuarta y última (Turoliense superior-Ventiense) se depositó tras la retirada del mar de la Cuenca de Guadix. con depósitos continentales aluviales s./.
Prognostic significance of heart rate in hospitalized patients presenting with myocardial infarction
Lorenzo Fácila,Pedro Morillas,Juan Quiles,Federico Soria
World Journal of Cardiology , 2012, DOI: 10.4330/wjc.v4.i1.15
Abstract: AIM: To investigate the prognostic significance of resting heart rate in patients with acute coronary syndrome (ACS), independent of other known factors. METHODS: Patients 40 years of age or older who had been admitted with acute coronary syndrome (ACS) to one of the 94 hospitals participating in the Prevalence of Peripheral Arterial Disease in Patients with Acute Coronary Syndrome (PAMISCA) study were included. Patients were divided into two groups based on their resting heart rate (HR ≥ or < 70 bpm). Complications were recording during a follow-up period of 1 year. RESULTS: There were 1054 ACS patients analyzed (43.5% with ST segment elevation and 56.5% without elevation). Mean age was 66.6 ± 11.7 years, 70.6% were male and 29.4% of subjects were female. During follow-up, more patients in the HR ≥ 70 bpm group were hospitalized for heart failure and they also had a higher mortality rate. In the multivariate analysis, a heart rate of ≥ 70 bpm was independently related to overall mortality during the follow-up period (hazard ratio 2.5; 95% confidence interval, 1.26-4.97, P = 0.009). CONCLUSION: A resting heart rate ≥ 70 bpm in patients who survive an ACS is an indicator of a high risk of suffering cardiovascular events during follow-up.
DE ACROBATAS Y OTRA MALA GENTE
Ramón J. Soria Bre?a
Nómadas , 2000,
Abstract:
GARBEO POR NEW YORK
Ramón J. Soria Bre?a
Nómadas , 2002,
Abstract:
La sociedad transideológica
Ramón J. Soria Bre?a
Nómadas , 2004,
Abstract:
Les ruminantia (Artiodactyla, Mammalia) du miocene des bugti (Balouchistan, Pakistan)
Ginsburg, L.,Morales, J.,Soria, D.
Estudios Geologicos , 2001, DOI: 10.3989/egeol.01573-4133
Abstract: The revision of the old material studied by Pilgrim (1908, 191 1, 1912, Forster Cooper, 1915) added to the study of the fossils recently yielded in the synclinal of Dera Bugti (Southem Pakistan) by Welcome and its team (Welcomme et al., 1997) leads to consider the existence of five ruminats genera (Siarnotragulus, Dorcahune, Progiraffa, Bugtimeryx, Eotragus), belonging to eigth species. La revisión de los materiales descritos por Pilgrim (1908, 1911, 1912, Forster Cooper, 1915) junto al estudio de los hallazgos recientes realizados en el sinclinal de Dera Bugti (Sur de Paquistán) por Welcomme et al. (1997), nos permite reconocer en esta área cinco géneros de ruminantes (Siamotragulus, Dorcahune, Progiraffa, Bugtimeryx, Eotragus) con un total de ocho especies.
Dark halo microphysics and massive black hole scaling relations in galaxies
Curtis J. Saxton,Roberto Soria,Kinwah Wu
Physics , 2014, DOI: 10.1093/mnras/stu1984
Abstract: We investigate the black hole (BH) scaling relation in galaxies using a model in which the galaxy halo and central BH are a self-gravitating sphere of dark matter (DM) with an isotropic, adiabatic equation of state. The equipotential where the escape velocity approaches the speed of light defines the horizon of the BH. We find that the BH mass ($m_\bullet$) depends on the DM entropy, when the effective thermal degrees of freedom ($F$) are specified. Relations between BH and galaxy properties arise naturally, with the BH mass and DM velocity dispersion following $m_\bullet\propto\sigma^{F/2}$ (for global mean density set by external cosmogony). Imposing observationally derived constraints on $F$ provides insight into the microphysics of DM. Given that DM velocities and stellar velocities are comparable, the empirical correlation between $m_\bullet$ and stellar velocity dispersions $\sigma_\star$ implies that $76$ the dense dark envelope surrounding the BH approaches the mean density of the BH itself, while the outer halo can show a nearly uniform kpc-scale core resembling those observed in galaxies.
Page 1 /301151
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.