Search results for "EDAS"
showing 10 items of 90 documents
Top-of-Atmosphere Retrieval of Multiple Crop Traits Using Variational Heteroscedastic Gaussian Processes within a Hybrid Workflow.
2021
In support of cropland monitoring, operational Copernicus Sentinel-2 (S2) data became available globally and can be explored for the retrieval of important crop traits. Based on a hybrid workflow, retrieval models for six essential biochemical and biophysical crop traits were developed for both S2 bottom-of-atmosphere (BOA) L2A and S2 top-of-atmosphere (TOA) L1C data. A variational heteroscedastic Gaussian process regression (VHGPR) algorithm was trained with simulations generated by the combined leaf-canopy reflectance model PROSAILat the BOA scale and further combined with the Second Simulation of a Satellite Signal in the Solar Spectrum (6SV) atmosphere model at the TOA scale. Establishe…
Forecasting the volatility of biofuel feedstock prices: the US evidence
2019
Given that, nowadays, 40% of the US corn crop is used for biofuel production, there is a growing concern that the rise in biofuel production might lead to an increase in food prices. However, it is also obvious that significant growth in biofuel use has minimized the demand for fossil fuel and has hence reduced the volume of carbon emissions. It is therefore crucial to model corn market volatility precisely because such an estimate could play a vital role in stabilizing food and biofuel market prices. For this purpose, we consider using the information content of the corn implied volatility (CIV) index to predict the corn futures market return volatility. Using symmetric and asymmetric GARC…
Modeling Conditional Skewness in Stock Returns
2007
Abstract In this paper, we propose a new GARCH-in-Mean (GARCH-M) model allowing for conditional skewness. The model is based on the so-called z distribution capable of modeling skewness and kurtosis of the size typically encountered in stock return series. The need to allow for skewness can also be readily tested. The model is consistent with the volatility feedback effect in that conditional skewness is dependent on conditional variance. Compared to previously presented GARCH models allowing for conditional skewness, the model is analytically tractable, parsimonious and facilitates straightforward interpretation.Our empirical results indicate the presence of conditional skewness in the mon…
Mujer y representación política institucional en la Comunidad Valenciana. 1977-1995. Diputadas, ministras y cargos institucionales
2014
“Mujer y representación política institucional en la Comunidad Valenciana. 1977-1995. Diputadas, ministras y cargos institucionales” es la primera parte de un trabajo de documentación para un capítulo de “La democracia en la Comunidad Valenciana. Partidos, elites políticas, elecciones y programas políticos”. “Mujer, poder político y democracia paritaria”. Se recoge el papel de la mujer en la vida política de la Comunidad Valenciana en la democracia actual, desde 1977. Es documentación sin elaborar, pero que aporta datos de la presencia de la mujer en las instituciones, partidos y sindicatos. Cuando este completa será una parte de la investigación referida, y de la que ya hay dos publicacion…
An alternative conception of PM10 concentration changes after short-term precipitation in urban environment
2018
Abstract In the article, a linear model is presented which describes a reduction of PM10 mass concentration in relation to the type of precipitation and water vapour content in the air. The model was built using covariance analysis. In studies of PM10 concentration changes, the results of 247 observations were used, which were carried out in the urban area. Concentration changes were archived during short-term (30 min) convection and large-scale rainfalls. For the determination of PM10 mass concentration, the reference method was used. To describe changes in PM10 concentration in the air after precipitation, a series of linear models were created, in which the explanatory variables were: th…
Dosage individualization of erythropoietin using a profile-dependent support vector regression
2003
The external administration of recombinant human erythropoietin is the chosen treatment for those patients with secondary anemia due to chronic renal failure in periodic hemodialysis. The objective of this paper is to carry out an individualized prediction of the EPO dosage to be administered to those patients. The high cost of this medication, its side-effects and the phenomenon of potential resistance which some individuals suffer all justify the need for a model which is capable of optimizing dosage individualization. A group of 110 patients and several patient factors were used to develop the models. The support vector regressor (SVR) is benchmarked with the classical multilayer percept…
Five times sit-to-stand test in subjects with total knee replacement: Reliability and relationship with functional mobility tests
2017
The objective was to determine the inter-observer and test/retest reliability of the "Five-repetition sit-to-stand" (5STS) test in patients with total knee replacement (TKR). To explore correlation between 5STS and two mobility tests. A reliability study was conducted among 24 (mean age 72.13, S.D. 10.67; 50% were women) outpatients with TKR. They were recruited from a traumatology unit of a public hospital via convenience sampling. A physiotherapist and trauma physician assessed each patient at the same time. The same physiotherapist realized a 5STS second measurement 45-60min after the first one. Reliability was assessed with intraclass correlation coefficients (ICCs) and Bland-Altman plo…
Mujer, poder político y democracia paritaria. “Mujer y representación política institucional en la Comunidad Valenciana. 1977-1995. 2 parte.
2014
Mujer, poder político y democracia paritaria. “Mujer y representación política institucional en la Comunidad Valenciana. 1977-1995. 2 parte. En esta segunda parte se recogen las mujeres que han formado parte de la Administración Local (alcaldesas, diputadas provinciales y FVMP), en los sindicatos, asi como en otras instituciones: Consell Valencià de Cultura, Consejo de Radiotelevisión Valenciana, Sindicatura de Agravios, Academia Valenciana de la Lengua, universidades, direcciones de partidos políticos, y otras organizaciones de la Comunidad Valenciana. “Mujer y representación política institucional en la Comunidad Valenciana. 1977-1995. Diputadas, ministras y cargos institucionales” es la …
Producción, comunicación, comercio y moneda en la Lusitania romana: el caso de la villa romana de Clavellinas (Torremejía, Badajoz)
2015
Las obras de la A-66 (Autovía de Extremadura) descubrieron un gran número de yacimientos arqueológicos que fueron excavados y documentados en su totalidad. La Villa Romana de Clavellinas es uno de estos ejemplos. Excavada entre junio del 2001 y enero de 2002, aportó gran número de estructuras y de restos materiales, suficientes para considerarla como un centro productivo rural romano. A su vez, también se documentaron un gran número de monedas con una cronología del siglo I d.C. al IV d.C. La catalogación de estas monedas y la valoración conjunta de todos los elementos exhumados nos permiten aproximarnos a la economía rural de la Lusitania Romana. When the A- 66 (Silver highway) was build, …
Zvaigžņotā Debess: 2009, Rudens (205)
2009
Contents: I.Daube. Jānis Ikaunieks ; A.Balklavs. Mountains on the Venus ; TASS and “Pravda” materials. Soviet Automatic Stations “Venera-5” and “Venera-6” Reach Venus ; A.Alksnis. Gathering of Astronomers at the University ; A.Alksnis, M.Ābele, I.Eglītis, B.Rjabovs, K.Salmiņš, I.Pundure. Directions of Scientific Research of the UL Institute of Astronomy Assessed ; D.Docenko. Meteorite Fallen in Sudan Recovered ; A.Alksnis. How Asteroids Will Disturb Observation with Extremely Large Telescopes ; M.Gills. Daily in Network with Astronomy ; I.Pundure. Arturs Balklavs and Astronomy of Latvia (continued) ; M.Sudārs. IXV – Step towards Reusable Space Vehicles ; V.Kalniņš. Hyperdrive and Heim’s Qua…