Search results for "Association."
showing 10 items of 1723 documents
Testing for local structure in spatiotemporal point pattern data
2017
The detection of clustering structure in a point pattern is one of the main focuses of attention in spatiotemporal data mining. Indeed, statistical tools for clustering detection and identification of individual events belonging to clusters are welcome in epidemiology and seismology. Local second-order characteristics provide information on how an event relates to nearby events. In this work, we extend local indicators of spatial association (known as LISA functions) to the spatiotemporal context (which will be then called LISTA functions). These functions are then used to build local tests of clustering to analyse differences in local spatiotemporal structures. We present a simulation stud…
Assessing local differences between the spatio-temporal second-order structure of two point patterns occurring on the same linear network
2021
Abstract We introduce Local Indicators of Spatio-Temporal Association (LISTA) functions on linear networks and use them to build a statistical test for local second-order structure. This allows to identify differences in the spatio-temporal clustering behaviour of two point patterns, a point pattern of interest and a background one, both occurring on the same linear network. We assess the performance of the testing procedure for local second-order structure through simulation studies under a variety of scenarios that also account for different generating point processes. We show that the proposed local test is able to correctly identify the spatio-temporal difference in the local second-ord…
Mapping accretion and its variability in the young open cluster NGC 2264: A study based on u-band photometry
2014
We aim at characterizing the accretion properties of several hundred members of the star-forming cluster NGC 2264 (3 Myr). We performed a deep u,g,r,i mapping and a simultaneous u+r monitoring of the region with CFHT/MegaCam in order to directly probe the accretion process from UV excess measurements. Photometric properties and stellar parameters are determined homogeneously for about 750 monitored young objects, spanning the mass range 0.1-2 Mo. About 40% are classical (accreting) T Tauri stars, based on various diagnostics (H_alpha, UV and IR excesses). The remaining non-accreting members define the (photospheric+chromospheric) reference UV emission level over which flux excess is detecte…
The Gaia-ESO survey: Discovery of a spatially extended low-mass population in the Vela OB2 association
2015
The nearby (distance~350-400 pc), rich Vela OB2 association, includes $\gamma^2$ Velorum, one of the most massive binaries in the solar neighbourhood and an excellent laboratory for investigating the formation and early evolution of young clusters. Recent Gaia-ESO survey observations have led to the discovery of two kinematically distinct populations in the young (10-15 Myr) cluster immediately surrounding $\gamma^2$ Velorum. Here we analyse the results of Gaia-ESO survey observations of NGC 2547, a 35 Myr cluster located two degrees south of $\gamma^2$ Velorum. The radial velocity distribution of lithium-rich pre-main sequence stars shows a secondary population that is kinematically distin…
A cladistic approach to testing phylogenomic evolution in Strepsirhines
2010
A Happy Marriage: Academia, Professional and Scientific Associations
2015
This paper advocates for a greater integration between Higher education and Professional and Scientific Associations (PSAs). With the development and adoption of Information and Communication Technologies (ICTs), the costs associated with the collection, storage, processing and transmission of information have been reduced. Eventually, the supply of information has boomed. However, more does not necessarily imply better. Free online resources can enhance the learning process, but the lack of quality controls is still a major concern. Additionally, learning demands some degree of organisation and structure. We argue that Higher education can potentially benefit from a closer relationship wit…
Participación asociativa percibida en contextos socio-educativos: validación de contenido
2019
En las asociaciones del Tercer Sector de acción socioeducativa se han ido estableciendo lógicas, políticas y prácticas para acreditar la calidad de los servicios. Este tipo de orientaciones organizativas son similares a los procedimientos que se han llevado a cabo en los últimos años, en otros contextos educativos, y que han mermado considerablemente la participación real y eficaz de los principales agentes implicados. A ello se suma la falta de estándares para evaluar la participación asociativa percibida. Atendiendo a esta problemática, nos planteamos el objetivo de establecer unos indicadores válidos que permitan registrar la perspectiva de los socios y los profesionales acerca de su par…
Korporācijas Selonijas Palīdzības biedrības Savstarpīgās Apdrošināšanas biedrības statuti
1926
LU Kristīgā studentu biedrība
1927
Saturā: Uzaicinājums. Kādēļ mēs esam šeit? Kas ir Bībele? Kristīgo studentu biedrību vispasaules federācija un Eiropas Ziemeļ-Rietumu valstu kristīgo studentu vadoņu konference. LU Kristīgo studentu biedrības mērķi. LU Kristīgo studentu biedrības 1927./28. mācību gada darbības plāns un budžets. Rakstu krājums "Tagadne un kristietība". Sociālo jautājumu studijas. Bībeles studijas. Biedru-viesu vakari. Pateicības.
Me, an entrepreneur? Entrepreneurial identity, outgroup social identification, attitudes and intentions towards business creation / ¿Yo, un emprended…
2017
This article aims to further investigate the role of social identity processes in the formation of entrepreneurial intentions (EI). We investigate the general hypothesis that social identification with entrepreneurs is positively associated with EI and its antecedents such as attitude, perceived social norm (subjective norm) and perceived behavioural control (self-efficacy), considered as mediators. In particular, the role of three dimensions of social identification (affects, ties and self-typicality) was empirically studied in a sample of students that answered a questionnaire. Results from regression analyses show that the affects dimension is positively linked to attitude and the percei…