Search results for " sistema."
showing 10 items of 1920 documents
Sistema dei partiti, legislazione elettorale e disciplina dei gruppi parlamentari: è possibile governare la frammentazione politica in Italia?
2019
Fragmented party system in Italy: nightmare or advantage for democracy? by Laura Lorello In building the newly-established democracy, the Authors of the Italian Constitution attributed a fundamental role to political parties. Therefore, the Italian political system comprises numerous political parties, often small in size, which have to coalesce to form a government majority. The resulting fragmented party system in Italy is generally considered a negative characteristic. Historically, it has been very difficult to reduce the number of political parties. Many attempts were made to modify the electoral system, from proportional representation to majority rule during the last thirty years. Mo…
Modeling the probability distribution of peak discharge for infiltrating hillslopes
2017
Hillslope response plays a fundamental role in the prediction of peak discharge at the basin outlet. The peak discharge for the critical duration of rainfall and its probability distribution are needed for designing urban infrastructure facilities. This study derives the probability distribution, denoted as GABS model, by coupling three models: (1) the Green-Ampt model for computing infiltration, (2) the kinematic wave model for computing discharge hydrograph from the hillslope, and (3) the intensity-duration-frequency (IDF) model for computing design rainfall intensity. The Hortonian mechanism for runoff generation is employed for computing the surface runoff hydrograph. Since the antecede…
Runoff coefficients to predict peak discharge at hillslope scale: A small contribution to theoretical hydrology
2018
The science of hydrology holds a central role in the field of environmental Earth science, being intimately connected to meteorology, climatology, hydrogeology and ecology. In particular, the knowledge of hillslope hydrology is fundamental for understanding the flood phenomenon, for predicting the peak discharge and its probability distribution, which is necessary in many practical applications (design of hydraulic structures, urban, extra-urban planning, etc.). Using different approaches, there have been a multitude of studies on the hydrologic response at hillslope scale. One approach for deriving the hillslope response utilizes, in a distributed form, the differential equations of unstea…
Didáctica facilitadora. Un libro de aprendizaje
2021
Los hallazgos del aprendizaje de la psicología y la neurociencia han dejado claro en las últimas décadas que el aprendizaje es un proceso controlado por el individuo y sigue más una lógica de apropiación que una de transmisión (véase Arnold, 2017a). La didáctica facilitadora quiere separarse conscientemente de las demandas del input y enfocarse en el movimiento de aprendizaje del objeto, así como en las competencias y el resultado. El presente libro, titulado deliberadamente como un libro de aprendizaje en lugar de un libro de enseñanza, tiene la intención de ser un pequeño compendio que resume de manera compacta los elementos centrales y las ideas de la didáctica facilitadora de una amplia…
Un criterio per la determinazione della tolleranza della perdita di suolo
2014
Polyester microplastic fibers in soil increase nitrogen loss via leaching and decrease plant biomass production and N uptake
2022
Abstract Microplastic contamination, like other global change factors, can induce effects on ecosystem functions and processes, affecting various soil biophysical properties. However, effects of such contaminants on nutrient cycles in agroecosystems are still poorly understood. We here performed two pot experiments to investigate the effect of polyester microplastic fibers (PMFs) on soil physical properties, nitrogen cycle, and plant performance in a maize-based agroecosystem. Moreover, we followed the N loss via leaching in soil contaminated or not with PMFs by simulating heavy rainfall events that mimic a future scenario of climate change. Our results show that soil contaminated with PMFs…
Orobanche centaurina Bertol. the correct name for O. kochii F.W. Schultz (Orobanchaceae)
2019
After the studying the original material of Orobanche centaurina Bertol. (Orobanchaceae) deposited in BOLO, a forgotten species described from Massa (Central Italy) parasitizing Centaurea paniculata L., and compared it with the type of O. kochii F.W. Schultz and with the types of others taxa actually considered synonyms of this, we concluded that the name of Bertoloni is the correct one for this species. Orobanche centaurina Bertol., nombre correcto para O. kochii F.W. Schultz (Orobanchaceae). Después de estudiar el material original de Orobanche centaurina Bertol. (Orobanchaceae) depo sitado en BOLO, una olvidada especie descrita de Massa (Italia central) parásita de Centaurea paniculata L…
Testing assumptions and procedures to empirically predict bare plot soil loss in a Mediterranean environment
2015
Empirical prediction of soil erosion has both scientific and practical importance. This investigation tested USLE and USLE-based procedures to predict bare plot soil loss at the Sparacia area, in Sicily. Event soil loss per unit area, Ae, did not vary appreciably with plot length, l, because the decrease in runoff with l was offset by an increase in sediment concentration. Slope steepness, s, had a positive effective on Ae and this result was associated with a runoff coefficient that did not vary appreciably with s and a sediment concentration generally increasing with s. Plot steepness did not have a statistically detectable effect on the calculations of the soil erodibility factor of both…
Are Red Lists really useful for plant conservation? The New Red List of the Italian Flora in the perspective of national conservation policies
2013
La nuova Lista Rossa della flora Italiana comprende tutte le "policy" specie italiane e altre specie di nota conservazione e comprende 400 taxa di cui il 65% sono minacciate di estinzione. La Lista Rossa si basa su un enorme data-set georeferenziato utile per gli scopi di conservazione. - The New Red List of the Italian Flora includes all the Italian policy species and other species of known conservation concerns for a total of 400 taxa, 65% of which are threatened with extinction. The Red List is based on a huge georeferenced data-set useful for conservation purposes. -
Buona fede, ragionevolezza e «efficacia immediata» dei principi
2017
Il volume affronta il tema del ruolo assolto dalla buona fede in seno allʼinterpretazione del contratto, la questione, particolarmente controversa, delle caratteristiche e della funzione della ragionevolezza in materia contrattuale e, infine, il connesso e prevalente problema dellʼefficacia diretta dei principî, specie nellʼambito dei rapporti contrattuali. La prospettiva consente di allargare lo sguardo alla fisionomia attuale dellʼordinamento giuridico italiano, anche alla luce del processo di integrazione europea e dellʼinfluenza di ordinamenti internazionali. Sullo sfondo si stagliano le questioni del rapporto tra legislazione e giurisdizione, dellʼindividuazione delle fonti del diritto…