2,756 research outputs found
European Integration and Knowledge Flows across European Regions
No full textCappelli R. and Montobbio F. European integration and knowledge flows across European regions, Regional Studies. Using data on inventor citations and inventor collaborations, changes in geographical patterns of knowledge flows between European regions during the period 1981–2000 are analysed. It is shown that inventor collaborations become less geographically localized, while inventor citations become more localized. The European integration process has a significant effect on reducing barriers to knowledge flows between new and old European Union members. For inventor citations, this effect relates only to the European Union enlargement of 1995 and is confined to knowledge flows from Austria, Finland and Sweden to old European Union members
F. Doveil, “Oltre lo stupore tecnologico”
No full textL'articolo recensisce l'opera di Patrizia Ranzo e Sergio Cappelli
The STP algorithm as Overfitting Avoidance Tool in Tree Based Methodologies
No full textNell’ambito dei metodi di classificazione e regressione ad albero si mostrerà come l’algoritmo STP (Cappelli et al, 2001) costituisca un utile strumento di overfitting avoidance. Il problema dell’ overfitting si sostanzia nella presenza di “false” suddivisioni che riflettono peculiarità dei dati piuttosto che relazioni realmente esistenti tra la variabile di risposta ed i predittori. I metodi classici utilizzati per far fronte a tale problema essendo basati sulla valutazione dell’overfitting in termini di errore appaiono non del tutto appropriati all’uopo. Per contro, la procedura STP, essendo impostata sulla valutazione della relazione di dipendenza tra la variabile di risposta e le variabili di split, è in grado di valutare la presenza di sovradattamento e conservare le sole suddivisoni realmente esplicative
Multiple Structural-Change Model Analysis via Theoretical Regression Trees
No full textThe analysis of structural-change models is nowadays a
popular subject of research both in econometric and
statistical literature. The most challenging task is to identify
multiple breaks occurring at unknown dates. In case of multiple shifts in mean Cappelli et al (2008) have proposed a method based on regression trees. In this paper we propose an extension of this method to address the problem of estimating the break dates and their number in the general framework of the linear model with multiple structural changes. We present simulation results pertaining to the behavior of the proposed approach
Clío. Musa I (con un'appendice tratta dalla Musa Melpómene) a cura di A. Martinengo, F. Cappelli e B. Garzelli
No full textAn Analysis of Water Security under Climate Change
No full textWater is a multidimensional issue, involving water availability, access to freshwater, spatial and temporal distribution of resources, competition among its uses, ecosystems conservation, climate-related disasters and risks and several other aspects. The water security approach manages such complexity and proposes a comprehensive view of human security in relation to the water-related issues. Consequently, the solutions developed in order to face this multi-faceted concept should reflect its thorough vision. The aim of the present work is to investigate the relationship between climate change and water security. Exploring such a relationship is truly important in order to help policy-makers in the development of adaptation and mitigation strategies. In the water context, this challenge is further complicated by the possible conflicts arising between climate and water policies. In order to carry out such an analysis, an indicator measuring water security, namely the Water Security Index, is created. In the present work, climate change is considered from four different perspectives but, as revealed by the econometric results, it always has a predominant (negative) effect on water security
Al margen de la historia: "Pobreza no es vileza" de Lope de Vega entre amor y heroísmo
No full textLa presente contribución explora la relación entre el teatro español del Siglo de Oro y la historia contemporánea a partir del estudio de la comedia de Lope de Vega Pobreza no es vileza (1620-22). Perteneciente al ciclo teatral dedicado a la Guerra de Flandes, Pobreza no puede catalogarse como comedia “soldadesca” ni de “hechos famosos”, estando más bien centrada en las vicisitudes en temas de honor, amor y heroísmo del protagonista Mendoza, caballero disfrazado de soldado pobre. Sin embargo, reducir el conflicto hispano-holandés, en la obra, a un mero ‘telón de fondo’, como suele hacer la mayoría de los críticos, parece demasiado simplista y limitante. Por ello, pretendemos demostrar cómo, a pesar de su tono brioso y su trama hábilmente tejida en torno a la historia personal del protagonista, Pobreza no es vileza evidencia la misma intención elogiosa dirigida a realzar las grandes hazañas de España y sus héroes nacionales en Flandes que las restantes piezas de la serie, con la única diferencia que aquí Lope logra un perfecto equilibrio entre el drama histórico y la comedia ‘novelesca’
Rec. a F. Delle Donne – G. Cappelli, Nel Regno delle lettere. Umanesimo e politica nel Mezzogiorno aragonese, Roma, Carocci, 2021
No full textRecensione del volume di F. Delle Donne e G. Cappelli, "Nel Regno delle lettere. Umanesimo e politica nel Mezzogiorno aragonese", Roma, Carocci, 202
Verosimiglianza storica vs memoria creativa in "El prodigioso príncipe transilvano"
No full textReinventing the past is one of the assumptions of literature, which can shape and improve memories according to the circumstances and conditioning – being them conscious or not – of the act of writing. In the Spanish theatre of the Golden Age, political propaganda and the consequent need to propose heroes conforming to the prevailing political-religious ideology to the public of corrales de comedia were almost always conditioning the creative process. This is also the case of El prodigioso príncipe transilvano (1596), a historical comedy set at the time of the long Spanish-Turkish conflict (1526-1606) and dedicated to exalting the figure of Sigismund Báthory, in truth one of the most controversial figures in the history of Romanian principalities. In the text, the fanciful positive representation of the prince as a model of miles Christi contrasts with the negative one of the bloodthirsty Ottoman sultan, Muhammad III, in a continuous mixture of respect for history and opportunistic manipulation of documentary sources. This contribution aims at investigating the extent and mechanisms that, in the text, regulate this intersection of historical reliability and creative reworking of a recent past for pro-Spanish and pro-catholic propaganda purposes
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