180,928 research outputs found
A gravity model of mortality rates for two related populations
No full textThe mortality rate dynamics between two related but different-sized populations are modeled consistently using a new stochastic mortality model that we call the gravity model. The larger population is modeled independently, and the smaller population is modeled in terms of spreads (or deviations) relative to the evolution of the former, but the spreads in the period and cohort effects between the larger and smaller populations depend on gravity or spread reversion parameters for the two effects. The larger the two gravity parameters, the more strongly the smaller population’s mortality rates move in line with those of the larger population in the long run. This is important where it is believed that the mortality rates between related populations should not diverge over time on grounds of biological reasonableness. The model is illustrated using an extension of the Age-Period-Cohort model and mortality rate data for English and Welsh males representing a large population and the Continuous Mortality Investigation assured male lives representing a smaller related population.Gravity model; mortality rates; related populations
Longevity hedging 101: A framework for longevity basis risk analysis and hedge effectiveness
No full textBasis risk is an important consideration when hedging longevity risk with instruments based on longevity indices, since the longevity experience of the hedged exposure may differ from that of the index. As a result, any decision to execute an index-based hedge requires a framework for (1) developing an informed understanding of the basis risk, (2) appropriately calibrating the hedging instrument, and (3) evaluating hedge effectiveness. We describe such a framework and apply it to a U.K. case study, which compares the population of assured lives from the Continuous Mor- tality Investigation with the England and Wales national population. The framework is founded on an analysis of historical experience data, together with an appreciation of the contextual relationship between the two related populations in social, economic, and demographic terms. Despite the different demographic profiles, the case study provides evidence of stable long-term relationships between the mortality experiences of the two populations. This suggests the important result that high levels of hedge effectiveness should be achievable with appropriately cali- brated, static, index-based longevity hedges. Indeed, this is borne out in detailed calculations of hedge effectiveness for a hypothetical pension portfolio where the basis risk is based on the case study. A robustness check involving populations from the United States yields similar results.Longevity risk; basis risk; hedge effectiveness
Gospatric’s Writ: una nuova interpretazione dell'origine del testo alla luce dell'analisi storico-linguistica
No full textUn progetto di trascrizione ed edizione digitale del codice Napoli, Biblioteca Nazionale, MS XIII.B.29
No full textL’articolo delinea gli obiettivi del progetto di trascrizione ed edizione
digitale del manoscritto Napoli, Biblioteca Nazionale, MS XIII.B.29. Il codice,
preziosissimo in quanto unico esempio di letteratura inglese tardomedievale conservato
in Italia, contiene romanzi cavallereschi e un poema agiografico che conobbero
ampia circolazione nell’Inghilterra del quattordicesimo e quindicesimo secolo,
oltre ad un ricettario medico finora poco conosciuto. A parte la sua rilevanza
filologica e letteraria (la maggior parte dei testimoni delle opere ivi contenute
si differenzia talvolta anche in modo marcato rispetto al resto delle rispettive
tradizioni testuali), la presenza di note in italiano e, soprattutto, di un’illustrazione
che testimonierebbe la sua possibile appartenenza a Tommaso Campanella pongono
il codice in una posizione di sicuro interesse storico e contestualizza in
modo peculiare la sua fruizione nell’ambiente culturale napoletano del sedicesimo
e diciassettesimo secolo. L’obiettivo principale del progetto consiste, dunque,
nel fornire uno strumento che permetta la più ampia fruizione e lo studio di un
manoscritto finora praticamente sconosciuto ma unico nel suo genere. Oltre a dettagliare le modalità di marcatura dei testi e di codifica degli elementi paratestuali,
si fornirà un piano preliminare di edizione, che verrà realizzato attraverso
l’interfaccia open source EVT
Teachers’ and Students' Attitudes Towards Traditional and Computer Assisted Blended Teaching and Learning Processes in Mechanical Engineering Subjects Area
No full textThe effectiveness of traditional teaching-learning process in Computer Aided Design (CAD), Computer Aided Manufacturing CAM and Computer Numerical control CNC (CAD-CAM-CNC) module has been evaluated against recently developed two blended teaching learning models. The blended learning systems have been developed by integrating computer assisted instructions with the traditional teaching learning system. This study in particular reports teachers’ and students’ views about various facets of teaching and learning process under different modes. It has been see that blended learning modes find better acceptance amongst teachers and students as co mpared to traditional teaching mode
Inglese: R. Khalaf, TV poetry is epic success as Arabs return to roots
No full textThis is a piece of a column of a Business English Course which Enrico Reggiani wrote and edited for the Italian economics newspaper Il Sole 24 Ore del Lunedì for more than twenty years (1986-2008). In this case, The Financial Times was its original English source. Between 1996 and 2008, Reggiani’s column became weekly and was organized in three sections: THE complete TRANSLATION of a specialized article on socio-political-economic subjects from The Financial Times; THE SPECIALIZED LEXICON: THE DICTIONARY, a commented glossary of the most important specialized terms recurring in the article; THE SPECIALIZED LEXICON: THE KEYWORDS, where fundamental specialized words and phrases from the same article are commented from various points of view: linguistic, literary, cultural, institutional, et al
Yusef Abd Allah Jibril Abd Allah, 10 ans - "Dessinez-moi la nature": numérisation de dessins d'enfants [travail ethnographique sur la représentation de l'environnement à Siwa, oasis égyptienne du désert libyque, par Vincent Battesti].
No full textYusef Abd Allah Jibril Abd Allah (garçon), 10 ans (Siwa) [fichier Siwa 01-r(b).tif] L'arbre à droite est un pommier, l'autre à gauche un dattier. L'homme en bas tient dans la main une gargoulette d'eau. Sur sa gauche, une source et au-dessus de lui un âne attelé à une charrette contenant des paniers de pommes récoltées. L'homme bleu prend des dattes dans l'arbre. [Ateliers avec les enfants berbérophones de l'oasis de Siwa (Égypte), garçons et fillettes de 8 à 12 ans, réalisés le 21 février 2006 près de l'école du village d'Aghurmi (proche de Siwa) et le 22 février 2006 près du souk Siwa même. Une seule demande leur a été faite (en leur fournissant le matériel de dessin) : dessinez la nature. Objectif : voir ce que représente la nature pour eux et ce qu'ils en représentent.
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