1,419 research outputs found
Spatio-temporal log-Gaussian Cox processes on earthquake events
This work presents an application of spatio-temporal log-Gaussian Cox processes for the
description of earthquake events. To explain the overall spatial trend, spatial geological information
in the study area such as faults and volcanoes are introduced in the model. Moreover, an anisotropic
specification of the covariance matrix of the Gaussian process is used to improve the explanation of the
phenomenon. We apply and compare different models to explain the seismic events occurred in Alaska
over the last decades
Hadronic aspects of exotic baryons
In this talk I look into three different topics, addressing first the
possibility that the is a bound state of , exploiting the
results of this study to find out the contribution of two meson and one baryon
components in the baryon antidecuplet and in the third place I present results
on a new resonant exotic baryonic state which appears as dynamically generated
by the Weinberg Tomozawa interaction.Comment: Talk at the International Workshop PENTAQUARK0
On the determination of quantum numbers and other topics of exotic baryons
In this talk I look into three different topics, addressing first a method to
determine the quantum numbers of the , then exploiting the
possibility that the is a bound state of and in the third
place I present results on a new resonant exotic baryonic state which appears
as dynamically generated by the Weinberg Tomozawa interaction.Comment: 9 pags. Talk in the NSTAR04 Workshop, Grenoble, march 200
Sustainable rural development through vocational education: Sot River landscape restoration workshop
[EN] Most of the small towns in the inner area of Spain have problems with the loss of population, low economic
development, and unemployment. This is a widespread phenomenon in many areas, such as the Valencia
region, where significant differences exist between the periphery coastal zone and the interior.
Some of these towns have natural resources like highlands, rivers, and vegetation as significant tourist
attractions. Vocational education programs are oriented to increase the employment of the residents
while keeping the characteristics of its population and its territory in the different municipalities.
Sot de Chera, located in the region of the Serranía (70 km from Valencia), is one of these municipalities.
This paper presents the educational experience using one of these programs and workshops for the
recovery of an area of outstanding landscape and environmental value.
During the last decade, some efforts have been made to combine these natural resources with other
activities to increase the area¿s population and economic activity.
The case presented uses a combination of teaching methodologies and practical training connected
with the daily life and activities of the people in the town. It has also involved all the inhabitants, including
their different opinions and participation.
The results obtained during the training and occupational project demonstrate the great potential of
these interventions. These types of activities and programs have become a substantial improvement for
the sustainable development of these areas.This project was carried out thanks to the funding received from the Servicio Valenciano de Empleo y
Formación (SERVEF), with the project Taller de Empleo restauración paisajística del Rio Sot 2014
(ETCOTE file FOTAE 2014/47/46), with the collaboration of the Sot de Chera Town hall.
The authors thank the staff of SERVEF and the Sot de Chera town hall for providing the support and
resources needed to carry out the activities.López-Mateu, V.; Pellicer, TM.; Blanch Vanacloig, J. (2022). Sustainable rural development through vocational education: Sot River landscape restoration workshop. IATED. 9951-9959. https://doi.org/10.21125/edulearn.2022.24009951995
Some properties of local weighted second-order statistics for spatio-temporal point processes
Diagnostics of goodness-of-fit in the theory of point processes are often considered through the transformation of data into residuals as a result of a thinning or a rescaling procedure. We alternatively consider here second-order statistics coming from weighted measures. Motivated by Adelfio and Schoenberg (2009) for the temporal and spatial cases, we consider an extension to the spatio-temporal context in addition to focussing on local characteristics. In particular, our proposed method assesses goodness-of-fit of spatio-temporal models by using local weighted secondorder statistics, computed after weighting the contribution of each observed point by the inverse of the conditional intensity function that identifies the process. Weighted second-order statistics directly apply to data without assuming homogeneity nor transforming the data into residuals, eliminating thus the sampling variability due to the use of a transforming procedure. We provide some characterisations and show a number of simulation studies
Datos imprecisos y mapas de distribución: el ejemplo de Phylan semicostatus Mulsant y Rey, 1854 (Coleoptera, Tenebrionidae) en la Serra de Tramuntana (Mallorca, Mediterráneo occidental)
Distribution maps are key tools for environmental management and biogeographic analyses. However, success in predicting spatial distribution is limited when using noisy presence/absence data sets. Both false absences and presences can be related with local departures from equilibrium (for example, temporary extinctions or unsuccessful colonisations). Moreover, false absences can arise from limited sampling effort. Here we explore an analytical strategy to get additional information on the presence/absence pattern of one target species from the presence/absence of all other species in the community. The logic is simple: the target species should display higher probability of presence at a site if a sample from this site is faunistically very close to the samples from other sites where the species occurs. Therefore, we first model presence/absence of the target species as a function of between-sample faunistic similarity. Second, the observed data for the target species are readjusted as a function of the expected probability of presence: current presences at sites with extreme low probability of presence are interpreted as unstable presences, and are recoded as absences. Seemingly, absences at sites with high probability of presence are interpreted as false absences, and are recoded as presences. In the experimental case presented herein, the recoding procedure is based on the presence/absence of 174 species, covering a broad taxonomic scope (snails, beetles, spiders and isopods). 1 km2 distribution maps of presence/absence of the endemic beetle Phylan semicostatus were modelled from these recoded data. Mapping is done using GARP based on four environmental explanatory variables. These maps seem to be more stable and less prone to fail in predicting presence than those derived directly from the observed data.Los mapas de distribución son herramientas clave para la gestión medioambiental y los análisis biogeográficos. Pero el éxito en las predicciones de distribución espacial es limitado cuando se dispone de datos imprecisos de la presencia/ausencia. Tanto falsas ausencias como falsas presencias pueden estar relacionadas con desviaciones locales del equilibrio (por ejemplo, extinciones temporales o colonizaciones no exitosas). Además, las falsas ausencias pueden surgir de un esfuerzo de muestreo limitado. Aquí se explora una estrategia analítica para obtener información adicional sobre el patron de presencia/ausencia de una especie diana a partir de la presencia/ausencia de otras especies en la comunidad. La logica es simple: la especie diana debería tener una mayor probabilidad de presencia en un punto si una muestra de este punto es faunísticamente muy similar a las muestras de otros puntos donde la especie ha sido detectada. Por tanto, primeros se modela la presencia/ausencia de la especie diana en función de la similaridad faunística entre puntos. En segundo lugar, los datos observados para la especie diana son reajustados en función de la probabilidad esperada de presencia: las presencias observadas en puntos con probabilidad de presencia muy baja son interpretadas como presencias inestables, y recodificadas como ausencias. De manera similar, las ausencias en puntos con probabilidad de presencia muy elevada son interpretadas como falsas ausencias, y recodificadas como presencias. En el caso experimental estudiado, el procedimiento de recodificación esta basado en los datos de presencia/ausencia de 174 especies, abarcando un abanico taxonómico muy amplio (caracoles terrestres, coleópteros, arañas e isópodos). El mapa de distribución de celdas de 1 km2 del coleóptero endémico Phylan semicostatus es modelado a partir de estos datos. El mapa de distribución es elaborado a partir de cuatro variables medioambientales, usando una estrategia analítica basada en algoritmos genéticos (GARP). Los mapas obtenidos con los datos recodificados parecen ser mas estables y menos susceptibles de fallar en sus predicciones que los mapas elaborados directamente con los datos originales
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