1,286 research outputs found
Structure and dimension of global branches of solutions to multiparameter nonlinear equations
No full textA general study of the dimension and connectivity properties of branches of solutions of equations depending on n-parameters are studied using the homotopy properties of 0-epi maps
Spread-ing Uncertainty, Shrinking Birth Rates: A Natural Experiment for Italy
No full textMany previous studies have documented the procyclicality of fertility to business cycles or labour
market indicators in Western countries. However, part of the recent fertility decline witnessed since
the Great Recession has been left unexplained by traditional measures. The present study advances
the notion that birth postponement might have accelerated in response to rising uncertainty, which
fuelled negative expectations and declining levels of confidence about the future. To provide empirical
support for the causal effect of perceived uncertainty on birth rates, we focus on Italy’s sovereign
debt crisis of 2011–2012 as a natural experiment. Perceived uncertainty is measured using Google
trends for the term ‘spread’—which acted as somewhat of a barometer for the crisis both in the media
and everyday conversations—to capture the general public’s degree of concern about the stability of
Italian public finances. A regression discontinuity in time identifies the effect of perceived uncertainty
on birth rates in Italy as a drop between 1.5% and 5%, depending on model specification
Louis-Philippe Dalembert, «vagabond jusqu’au bout de la fatigue»
No full textThe Haitian novelist and poet Louis-Philippe Dalembert (Port-au-Prince, 1962) has developed in his works of fiction the concept of vagabondage as a literary projection of his biographical wandering through multiple spaces. The aim of this essay is to study the presence of vagabondage and its distinctive features in those novels written by Dalembert that reflect the writer’s perpetual motion: Le Crayon du bon Dieu n’a pas de gomme (1996), L’Autre face de la mer (1998), L’Île du bout des rêves (2003), Les dieux voyagent la nuit (2006). The main characters are constantly moving, they are cosmopolitan wanderers who belong to many places at the same time, just like Dalembert himself. By analyzing the representation of movement in these fictions, we will show that the notion of vagabondage is depicted by the author as a positive and meaningful opportunity for the vagabond who travels across countries, languages and cultures
BIRD ASSEMBLAGES IN A STRUCTURALLY SIMPLIFIED MEDITERRANEAN SANDY BEACH: AN ANALYSIS AT SPATIAL AND TEMPORAL LEVEL
No full textStudies on the bird richness and abundance patterning in sandy coastal areas are almost neglected. A better knowledge of bird assemblage structure could permit the developing of appropriate conservation strategies in these key ecosystems. In this study, we aimed to test the hypothesis that a patchy and structurally oversimplified ecosystem, as a Mediterranean sandy beach, may host bird assemblages highly variable in space and time and relatively poor in richness and abundance, whose structure should be therefore affected by chance. In 2007 a transect laid along a sandy beach was carried out, allowing to analyse the data temporally (six 2-month periods) and spatially (three longitudinal habitat types), either at single species or assemblage level. We observed a total of 25 bird species. Bird assemblages showed a taxonomical, phenological and ecological heterogeneity. In late autumn-winter the beach hosted the richest assemblage, in summer-autumn the lowest. Differences in mean values among 2-month periods were significant for species richness. Beaches represent patchy ecosystems with a different availability of resources in space and time. The presence of vegetation and linked trophic resources presumably permits the occurrence of a large variation in resource availability that determines a high turnover for different species along the temporal and spatial niche. Finally, we observed an inverse relationship between human presence and species richness.Assemblages d’oiseaux sur une plage sableuse méditerranéenne structuralement simplifiée : analyse spatio-temporelle.
Les études des patterns de richesse et d’abondance spécifique sur les côtes sableuses sont quasi négligées. Une meilleure connaissance de la structure des assemblages d’oiseaux pourrait permettre le développement de stratégies de conservation appropriées dans ces écosystèmes-clés. Dans la présente étude, nous nous proposons de tester l’hypothèse qu’un écosystème aussi morcelé et structuralement aussi simplifié qu’une plage sableuse méditerranéenne pourrait abriter des assemblages d’oiseaux hautement variables dans le temps et dans l’espace et relativement pauvres en richesse et abondance, dont la structure serait donc affecté par le hasard. En 2007 un transect a été établi le long d’une plage sableuse afin d’analyser les données temporelles (six périodes de deux mois) et spatiales (trois types d’habitats longitudinaux) au niveau d’une espèce ou d’un assemblage. Nous avons observé un total de 25 espèces. Les assemblages d’oiseaux ont montré une hétérogénéité taxinomique, phénologique et écologique. La plage hébergeait l’assemblage le plus riche en fin d’automne-hiver, le plus pauvre en été-automne. Les valeurs moyennes de la richesse spécifique se sont avérées significativement différentes selon la période de deux mois. Les plages représentent des écosystèmes morcelés avec des disponibilités en ressources différentes dans le temps et dans l’espace. La présence de végétation et des ressources trophiques associées permet vraisemblablement une grande variation de la disponibilité des ressources qui détermine un fort renouvellement des diverses espèces le long de la niche spatio-temporelle. Enfin, nous avons observé une relation inverse entre la présence humaine et la richesse spécifique.Battisti Corrado, Luiselli Luca, Vignoli Leonardo. Bird assemblages in a structurally simplified Mediterranean sandy beach: an analysis at spatial and temporal level. In: Revue d'Écologie (La Terre et La Vie), tome 67, n°1, 2012. pp. 63-70
Things change: Women’s and men’s marital disruption dynamics in Italy during a time of social transformations, 1970-2003
No full textWe study women’s and men’s marital disruption in Italy between 1970 and 2003. By applying an event-history analysis to the 2003 Italian variant of the Generations and Gender Survey we found that the spread of marital disruption started among middle-highly educated women. Then in recent years it appears that less educated women have also been able to dissolve their unhappy unions. Overall we can see the beginning of a reversed educational gradient from positive to negative. In contrast the trend in men’s marital disruption risk appears as a change over time common to all educational groups, although with persisting educational differentials.determinants, educational differences, event history analysis, gender difference, Italy, marital disruption
Raddoppio dei termini tra pasticci contingenti e questioni di fondo: dalla decadenza alla prescrizione? - Ancora sull’opportunità di passare «dalla decadenza alla prescrizione»
No full textNell’autotassazione, indotta dalla tassazione attraverso le aziende, i valori ed i principi sottostanti
al termine di decadenza per l’esercizio dei poteri di accertamento devono essere
profondamente ripensati; si è indebolita l’esigenza di una precisa linea di confine per una potestà
amministrativa d’imposizione ormai divenuta meramente potenziale; lo confermano i richiami,
ribaditi anche su Dialoghi, all’accertamento delle annualità «recenti». In modo complementare,
c’è un interesse a poter approfondire possibili frodi e occultamenti senza intralci
dall’imminente scadenza dei termini di accertamento. In questa logica di flessibilità si collocava
la nota questione del raddoppio dei termini di accertamento in caso di denuncia penale;
l’obiettivo era di consentire il proseguimento delle indagini quando a ridosso della scadenza
del termine ordinario per l’accertamento i verificatori trovavano indizi di reato che legittimavano
un approfondimento dei controlli. Al di là delle tante confuse contingenze, emerge l’inadeguatezza
teorica dell’istituto della decadenza, come limite temporale all’attività di imposizione
tributaria
Zes: tra credito d'imposta e assenza di agevolazioni fiscali di carattere sistematico.
No full textNel contributo vengono descritte le caratteristiche delle ZES essenziali ai fini dell'individuazione dello speciale regime fiscale al quale le stesse sono assoggettate. Ne merge un quadro normativo fin troppo specifico e legato a contingenze legislative. Viene ipotizzata la tutela ambientale come possibile filo conduttore unificante
D’une édition à l’autre. Le premier roman d’Anthony Phelps quarante ans après
No full textMoins l’infini, the first novel written by the Haitian writer and poet Anthony Phelps, has recently been republished, with some quite remarkable changes between the two editions. With a different title, a new dedication and some lexical and morphosyntactic variations, this reissue may be interpreted as a rewriting of the novel which was first published in 1972. This rewriting made by the author may be conscious or not but it results in a more universal atmosphere, less linked to a
strictly Haitian milieu. These variations are probably due to the historical and cultural gap between the two editions: forty years have passed and this love story which takes place under François Duvalier’s dictatorship has a different meaning now. The time has come to mourn the death of Duvalier’s opponents, the heroes never rewarded by justice that are mentioned in the new version of the title, Des fleurs pour les héros
Mesobuthus eupeus
No full textMesobuthus eupeus (C. L. Koch, 1839) Specimens. 1 adult ♂, No. 13 (FKCP), Aziz Abad, 10 August 2000; leg. V. Vignoli & P. Crucitti. Comments. This species of Buthidae has an enormous geographic range in the arid zone of Asia (Kovařík, 1997; Gromov, 2001), and is considered as one of the most common species in the entire Iran (Farzanpay & Pretzmann, 1974; Tirgari & Zargan, 2002).Published as part of Vignoli, Valerio, Kovařík, František & Crucitti, Pierangelo, 2003, Scorpiofauna of Kashan (Esfahan Province, Iran) (Arachnida: Scorpiones), pp. 1-7 in Euscorpius 9 on page 3, DOI: 10.18590/euscorpius.2003.vol2003.iss9.1, http://zenodo.org/record/464906
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