The SEIQS stochastic epidemic model with external source of infection

This paper deals with a stochastic epidemic model for computer viruses with latent and quarantine periods, and two sources of infection: internal and external. All sojourn times are considered random variables which are assumed to be independent and exponentially distributed. For this model extinction and hazard times are analyzed, giving results for their Laplace transforms and moments. The transient behavior is considered by studying the number of times that computers are susceptible, exposed, infectious and quarantined during a period of time (0, t] and results for their joint and marginal distributions, moments and cross moments are presented. In order to give light this analysis, some numerical examples are showed.

(Table S1) Age determination of sediment core RAPiD-21-03K

A decadal resolution time series of sea surface temperature (SST) spanning the last two millennia is reconstructed by combining a proxy record from a new sediment sequence with previously published data from core MD99-2275, north of Iceland. The alkenone based SST reconstruction is validated with historic observational data and compared to a new similar temporal resolution reconstruction obtained from sediment core RAPiD21-3K, in the subpolar North Atlantic. The two SST paleorecords show consistent multidecadal scale coolings throughout the interval and similar expressions during the contrasted climatic periods 'colloquially known' as the Medieval Climatic Anomaly (MCA) and Little Ice Age (LIA). In order to further understand the temporal and spatial SST variations and investigate the influence of natural forcings on the observed SST changes during the last millennium, we compare our time series to simulations using the Institut Pierre-Simon Laplace IPSLCM4-v2 climate model. This comparison highlights the potential importance of volcanism as a natural forcing driving coherent abrupt cooling events captured in the subpolar North Atlantic records.

Oeuvres complètes de Beaumarchais.: Nouv. éd., augmentée de quatre pièces de théatre et documents divers inédits, avec une introduction par Édouard Fournier; ornée de vingt portraits en pied coloriés, dessinés par Émile Bayard.

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Paris sous Louis XIV : monuments et vues /

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Théorie analytique des probabilités /

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Théorie analytique des probabilités /

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Précis de l'histoire de l'astronomie /

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Exposition du systême du monde /

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Exposition du systême du monde /

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Exposition du systême du monde /

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Le nouveau sobrino ou Grammaire de la langue espagnole : réduite a XXIII leçons /

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Los secretos de la generacion ó Arte de engendrar niños ó niñas segun se quiera, y de obtener hijos dotados de talento ... /

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Théorie analytique des probabilités.

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Anatomie philosophique et raisonnee, pour servir d'introduction a l'histoire naturelle /

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De voto paupertatis in religione : quod est abdicatio propietatis in proprium non habendo /

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