Questioni valutative in relazione alla definizione di "povert\ue0"

Questo contributo cerca di chiarire quali giudizi di valore siano alla base dei principali criteri di valutazione quantitativa della povert\ue0, e quali conseguenze pratiche abbia la scelta di un indicatore piuttosto di un altro quando si desideri valutare come la povert\ue0 stia mutando nel tempo o tra paesi, o quali siano gli effetti sulla povert\ue0 di una certa scelta di policy. Seguendo la tradizione di vari studi su questo tema, dividiamo l\u2019esposizione in tre parti, tenendo conto che per quantificare la povert\ue0 dobbiamo scegliere 1) lo spazio di valutazione, 2) la soglia che separa i poveri dagli altri e infine 3) l\u2019indice numerico che misura il fenomeno

Pressure induced magnetic phase separation in La0.75_{0.75}Ca0.25_{0.25}MnO3_{3} manganite

The pressure dependence of the Curie temperature T$_{C}(P)$ in La$_{0.75}$Ca$_{0.25}$MnO$_{3}$ was determined by neutron diffraction up to 8 GPa, and compared with the metallization temperature T$_{IM}(P)$ \cite{irprl}. The behavior of the two temperatures appears similar over the whole pressure range suggesting a key role of magnetic double exchange also in the pressure regime where the superexchange interaction is dominant. Coexistence of antiferromagnetic and ferromagnetic peaks at high pressure and low temperature indicates a phase separated regime which is well reproduced with a dynamical mean-field calculation for a simplified model. A new P-T phase diagram has been proposed on the basis of the whole set of experimental data.Comment: 5 pages, 4 figure

Karyological Observations on Two Crocus Species (Iridaceae) from Tuscany (Italy)

SUMMARYKaryotypical analysis of Crocus vernus (L.) Hill subsp. vernus (2n = 16 + 2B) and of Crocus etruscus Pari. (2n = 8) is reported. B-chromosomes in Crocus vernus (L.) Hill subsp. vemus are found for the first time. The karyological comparative analysis points out a true micromorphic differentiation between the two species considered

Surnames in local newspapers and social mobility

This paper exploits an innovative data source, the surnames contained in local newspapers during almost a century in the Italian Province of Modena (NUTS-3 level), to study the phenomenon of social mobility over time. Based on the hypothesis that the surnames that appear in the newspapers have a particular social relevance, the study of changes in the frequency distribution of the set of surnames over time allows to identify periods of greater or lower social mobility. The results show that the periods of greatest change have been the years of transition between democracy and the fascist regime and vice versa, and the 1980s. A strong regression towards the mean in the relative importance of surnames is also observed