Search results for "G1"
showing 10 items of 717 documents
Introducción de nuevos equipos e implementación de técnicas especiales aplicadas al tratamiento de lesiones de piel en radioterapia
2017
En el presente trabajo se ha realizado un análisis de riesgo de dos modalidades de tratamiento radioterápico de piel, la braquiterapia electrónica (eBT) y la irradiación total de la piel con electrones (TSEI). Paralelamente, se ha hecho un estudio de blindajes para la unidad de tratamiento de eBT. El trabajo se ha dividido en 4 capítulos. El capítulo 1 resume las principales ventajas de las técnicas de tratamiento del cáncer de piel no melanoma que se utilizan actualmente en radioterapia, contextualizando la implantación de la eBT. También se expone el tratamiento de la micosis fungoide en radioterapia, enfermedad que afecta a toda la superficie corporal del paciente, para la cual, la TSEI …
Futures pricing in electricity markets based on stable CARMA spot models
2012
We present a new model for the electricity spot price dynamics, which is able to capture seasonality, low-frequency dynamics and the extreme spikes in the market. Instead of the usual purely deterministic trend we introduce a non-stationary independent increments process for the low-frequency dynamics, and model the large uctuations by a non-Gaussian stable CARMA process. The model allows for analytic futures prices, and we apply these to model and estimate the whole market consistently. Besides standard parameter estimation, an estimation procedure is suggested, where we t the non-stationary trend using futures data with long time until delivery, and a robust L 1 -lter to nd the states of …
General framework for testing Poisson-Voronoi assumption for real microstructures
2020
Modeling microstructures is an interesting problem not just in Materials Science but also in Mathematics and Statistics. The most basic model for steel microstructure is the Poisson-Voronoi diagram. It has mathematically attractive properties and it has been used in the approximation of single phase steel microstructures. The aim of this paper is to develop methods that can be used to test whether a real steel microstructure can be approximated by such a model. Therefore, a general framework for testing the Poisson-Voronoi assumption based on images of 2D sections of real metals is set out. Following two different approaches, according to the use or not of periodic boundary conditions, thre…
Using the Scaling Analysis to Characterize Financial Markets
2003
We empirically analyze the scaling properties of daily Foreign Exchange rates, Stock Market indices and Bond futures across different financial markets. We study the scaling behaviour of the time series by using a generalized Hurst exponent approach. We verify the robustness of this approach and we compare the results with the scaling properties in the frequency-domain. We find evidence of deviations from the pure Brownian motion behavior. We show that these deviations are associated with characteristics of the specific markets and they can be, therefore, used to distinguish the different degrees of development of the markets.
Remote sensing and climate data as a key for understanding fasciolosis transmission in the Andes: review and update of an ongoing interdisciplinary p…
2006
Fasciolosis caused by Fasciola hepatica in various South American countries located on the slopes of the Andes has been recognized as an important public health problem. However, the importance of this zoonotic hepatic parasite was neglected until the last decade. Countries such as Peru and Bolivia are considered to be hyperendemic areas for human and animal fasciolosis, and other countries such as Chile, Ecuador, Colombia and Venezuela are also affected. At the beginning of the 1990s a multidisciplinary project was launched with the aim to shed light on the problems related to this parasitic disease in the Northern Bolivian Altiplano. A few years later, a geographic information system (GIS…
Low-altitude outbreaks of human fascioliasis related with summer rainfall in Gilan province, Iran
2011
Following human fascioliasis outbreaks in 1988 and 1999 in Gilan province, northern Iran, efforts are now made to shed light on the seasonal pattern of fascioliasis transmission in this endemic area, taking into account snail host populations, climatic conditions and human cases. Populations of the intermediate host snail (Lymnaea spp.) peak in May and November, while there is a fourfold increase in the rate of human fascioliasis in February compared to that of September. Transmission is likely to occur mainly in late autumn and sporadically in late spring. Rainfall, seasonally analysed in periods of 3 years, indicates that accumulated summer rainfall may be related with the 1988 and 1999 h…
Impact of climate change and man-made irrigation systems on the transmission risk, long-term trend and seasonality of human and animal fascioliasis i…
2014
Large areas of the province of Punjab, Pakistan are endemic for fascioliasis, resulting in high economic losses due to livestock infection but also affecting humans directly. The prevalence in livestock varies pronouncedly in space and time (1-70%). Climatic factors influencing fascioliasis presence and potential spread were analysed based on data from five mete- orological stations during 1990-2010. Variables such as wet days (Mt), water-budget-based system (Wb-bs) indices and the normalized difference vegetation index (NDVI), were obtained and correlated with geographical distribution, seasonality patterns and the two-decade evolution of fascioliasis in livestock throughout the province. …
'Entrepreneurial, institutional and financial strategies for FinTech profitability'
2022
The authors acknowledge the financial support from the FUNCAS Foundation, PGC2018 -099415 -B -100 MICINN/FEDER/UE, and Junta de Andalucia P18-RT-3571 Project.
Indigent consumers’ protection at the financial services market
2016
Opracowanie stanowi próbę odpowiedzi na pytanie, czy ochrona osób niezamożnych na rynku usług finansowych powinna być realizowana odrębnie w stosunku do powszechnie obowiązujących zasad oraz jakie elementy powinna obejmować ta ochrona? Ponadto – jakie podmioty powinny jej udzielać – czy te, które już istnieją na rynku, czy inne, nowe? Problem ochrony osób niezamożnych wynika stąd, że w dużej mierze osoby te są wykluczone z rynku podstawowego (mainstream market), objętego ochroną prawną. Część osób korzysta z oferty rynku alternatywnego, czy wręcz nieformalnego. Wydaje się więc, że dodatkowa ochrona osób niezamożnych powinna być ukierunkowana na te właśnie obszary rynku usług finansowych. Th…
Trading Nokia: The roles of the Helsinki vs the New York stock exchanges
2004
We use the Autoregressive Conditional Duration (ACD) framework of Engle and Russell (1998) to study the effect of trading volume on price duration (ie the time lapse between consecutive price changes) of a stock listed both in the domestic and the foreign market. As a case study we use the example of Nokia's share, which is actively traded both in the Helsinki Stock Exchange and the New York Stock Exchange (NYSE). We find asymmetry in the volume-price duration relationship between the two markets. In the NYSE the negative relationship is much stronger and exists both during and outside common trading hours. Outside common trading hours no such relationship is significant in Helsinki. Based …