1,668 research outputs found
Il Carcer nella produzione di Cardano
No full textAlongside a larger analysis of Cardano's moral philosophy since the De consolatione (1542), the essay focuses on the dialogue Carcer, and suggests a relationship between the difficulties encountered by the author in the Duchy of Milan in 1560-61, and the trial of 1570 in Bologna. Special attention is devoted to the philosophical reasons that support in the Carcer the Plutarchean sera numinis vindicta, one of Cardano's favorites topics
Comparing three possible hypoelliptic Laplacians on the 5-dimensional Cartan group via div-curl type estimates
No full textOn general Carnot groups, the definition of a possible hypoelliptic Hodge-Laplacian on forms using
the Rumin complex has been considered in (M. Rumin, “Differential geometry on C-C spaces and application
to the Novikov-Shubin numbers of nilpotent Lie groups,” C. R. Acad. Sci., Paris Sér. I Math., vol. 329, no. 11, pp.
985–990, 1999, M. Rumin, “Sub-Riemannian limit of the differential form spectrum of contactmanifolds,” Geom.
Funct. Anal., vol. 10, no. 2, pp. 407–452, 2000), where the author introduced a 0-order pseudodifferential operator
on forms. However, for questions regarding regularity for example, where one needs sharp estimates, this
0-order operator is not suitable. Up to now, there have only been very few attempts to define hypoelliptic Hodge-
Laplacians on forms that would allow for such sharp estimates. Indeed, this question is rather difficult to address
in full generality, the main issue being that the Rumin exterior differential dc is not homogeneous on arbitrary
Carnot groups. In this note, we consider the specific example of the free Carnot group of step 3 with 2 generators,
and we introduce three possible definitions of hypoelliptic Hodge-Laplacians.We compare how these three possible
Laplacians can be used to obtain sharp div-curl type inequalities akin to those considered by Bourgain &
Brezis and Lanzani & Stein for the de Rham complex, or their subelliptic counterparts obtained by Baldi, Franchi
& Pansu for the Rumin complex on Heisenberg groups
Laboratorio di statistica e probabilita' - problemi svolti
No full textEserciziario. Mc Graw-Hill Libri Italia. ISBN 88-386-0706-
The impact of energy and agriculture prices on the stock performance of the water industry
No full textWater issues are receiving increasing attention from policy-makers and international organizations due to water scarcity and global rising demand. Given that the demand for water is mainly driven by agriculture and energy, we use a multifactor market model to analyze the impact of agriculture and energy price trends on the price of listed companies operating in the water industry. Evidence highlights a sensitivity of water stocks returns to agriculture and energy price changes. Additionally, when using state space model to estimate dynamic beta coefficients, factor sensitivities show a time-varying behavior, especially during the 2008 economic and financial crisis
Possession
No full textThis chapter of the Historical Latin Syntax traces the evolution and use of predicative possessive constructions from Archaic to Late Latin. We demonstrate that, far from being merely a so-called “be-language”, Latin is a language where the major possessive type is based on a transitive verb (habeo) since the archaic stage. A textual, contrastive analysis of the habeo x and mihi est x types proves that between these two constructions there is a functional differentiation (i.e. syntactic and pragmatic, while the semantic level is relevant only to a minor extent). This, thus, explains: their different occurrence in the Latin corpus; their division-of-labour and, therefore, their coexistence through the history of Latin; and, finally, the diahronic evolution towards the transitive type. A comparison between the mihi est x and the genitive predicative type, which are fully differentiated on a functional plane, completes the picture of the whole architecture of predicative possession in Latin. Consequences can be drawn on the general plane, as “mixted” types (i.e. languages that are both have- and be-), such as Latin, must be taken into consideration when we approach the typology of predicative possession.
An analysis of attributive constructions is then offered, at the light of parameters such as: the order of the elements in the sequence, the definite status of the possessor/possessum constituents of the phrase, the semantic profile of the relation expressed, and the different morphological markers, etc.. Conclusions partly confirm previous hypotheses about the relation between the Latin stage and the Indoeuropean stage, while several generalizations from the typological point of view have to be adjusted (e.g. external possessor constructions).
The part on predicative possession is mainly due to Andrea Nuti; the part on attributive possession mainly to Philip Baldi. However, as the whole chapter is the result of a deep, mutual work carried on in full cooperation, the authors have agreed not to state explicitly and neatly an author-to-pages correspondence
Analisi dei brevetti nell'agricoltura italiana durante il periodo 1970-2003
No full textLo strumento brevettuale riveste un ruolo fondamentale nelle analisi economiche dei paesi industrializzati. I brevetti difatti, pur con alcuni limiti, possono costituire dei veri e propri indicatori della valutazione dell’attività tecnologica.
In questo lavoro viene svolta un’analisi dei brevetti destinati al settore agricolo nel periodo compreso tra il 1970 ed il 2003.
Dopo una breve descrizione del quadro normativo di riferimento e delle principali fonti di informazione ufficiali, il lavoro prosegue con un’analisi degli aspetti quantitativi relativi ai brevetti legati al mondo agricolo, approfondendo lo studio ai diversi sottosettori. Infine viene applicata una particolare metodologia, la Yale Technology Concordance, che consente di stimare l’incidenza dei brevetti depositati in altri settori (chimico, meccanico, ecc.) che hanno ricadute sul settore in esame
IOHEXOL CLEARANCE: A METHOD TO ESTIMATE GLOMERULAR FILTRATION RATE IN CLINICALLY NORMAL ADULT HORSES
No full textThe Effects of Agricultural Price Instability on Vertical Price Transmission: A Study of the Wheat Chain in Italy
No full textIn this paper we analyse vertical price transmission in two typical Italian wheat chains, the pasta and bread chains, that were particularly affected by strong market fluctuations during the last years. After having split the chains into two sides, upstream (farm⁻wholesale) and downstream (wholesale⁻retail), we apply a cointegration methodology allowing for the presence of potentially unknown structural breaks. Then, for the different subperiods detected by the break dates, we investigate the evolving price transmission elasticities finding evidence of asymmetric price transmission. In the pasta chain, farmers seem to be price-takers, while in the bread chain price transmission is related to market structure and to the coexistence of small and large retailers
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