1,720,977 research outputs found
Il Finanziamento dell'innovazione nell'economia della conoscenza
Full text linkIl passaggio da un’economia basata sulla produzione industriale ad una orientata all’informazione e successivamente alla conoscenza ha accresciuto il peso dell’innovazione quale fattore di sviluppo sociale, industriale ed economico e le ha riconosciuto un ruolo determinante nei processi di affermazione dei modelli di sviluppo dei singoli Paesi in scenari sempre più complessi ed integrati. Il paradigma operativo che può agevolare questo processo evolutivo comporta l’individuazione di un approccio capace di mettere a sistema i produttori di tecnologie innovative, i consumatori di tali tecnologie e le risorse disponibili verso settori knowledge based.
Nel processo di strutturazione di tale modello di sviluppo il sistema finanziario riveste un ruolo centrale, come lasciano sottintendere numerose evidenze empiriche relative al legame tra il livello di sviluppo del sistema finanziario e la capacità di crescita dell’economia reale.
Il presente lavoro intende affrontare il tema del finanziamento all’innovazione, con particolare riferimento alla connessione esistente tra la variabile finanziaria, quale main driver della crescita economica, e l’innovazione stessa, seguendo un approccio olistico attraverso il quale cogliere le numerose sfaccettature di cui si compone un problema tanto complesso.
In particolare, l’obiettivo principale del presente lavoro consiste nell’analisi del ruolo della variabile finanziaria nei processi di sviluppo, a partire dalla relazione tra innovazione ed investimenti in ricerca, e nella valutazione dell'efficacia delle diverse fonti di approvvigionamento delle risorse
Camera trapping the European wildcat (Felis silvestris silvestris) in Sicily (Southern Italy): preliminary results
Full text linkThe wildcat is an elusive species that is threatened with extinction in many parts of its range. In Sicily it still lives in a wide range of habitats. During 2006, camera traps were used to investigate the distribution of the wildcat over a 660 ha wide area on the south-western slope of Mount Etna (NE Sicily). Twelve out of 18 trapping stations provided a total of 24 photographs. Nine different individuals were identified using morphological criteria. Our work confirms the suitability of camera trapping for monitoring elusive carnivores
Effect of concrete properties on cyclic behavior of poorly engineered RC beam-column wall joint
Full text linkPost-earthquake observations have shown the reinforced concrete beam-column joints of dated structures may result in premature brittle failure during earthquakes. These critical zones transfer complex combination of forces between beams and columns and their premature failure may cause the catastrophic collapse of structures even in areas from low to moderate seismic risk. External beam-column joints (i.e., "wall" and "corner" joints) of buildings constructed without or with insufficient transverse reinforcement are often involved in this types of collapses. The aim of this study is to investigate how the structural response of RC beam-column joints is affected by several mechanical parameters of the concrete, including: compressive strength, tensile strength, Young's modulus, Poisson ratio and fracture energy in tension of the concrete. Both experimental tests and numerical models have been carried out. In particular, four RC beam-column sub-assemblies with no shear reinforcement in the joint have been designed, constructed and tested un- der cyclic loads. In particular, to reproduce the worst possible condition for the beam-column joints, no axial load was applied to the column the tests were performed with no axial load in the column. Experimental results were then compared with those predicted through numerical simulation carried out with a 3D FEM model, able to describe crack propagation in concrete. Experimental structural ductility of the tested RC frames were found surprisingly high and force-displacement numerical curves were found to match experimental ones both in terms of initial stiffness and maximum strength capacity. Sensitivities analysis carried out with respect of various concrete properties showed: (i) the frame strength capacity and ductility to increase with fc; (ii) in case of low concrete strength classes, the collapse of RC frames is expected to be in shear mode; (iii) for high concrete strength classes the collapse of RC frames may be reached in the beam column joint in pressure-bending mode; (iiii) both the maximum strength capacity and the ductility of the RC frames increase as the concrete fracture energy increases; (iiiii) Poisson ratio and concrete tensile strength seem not to have much influence on the mechanical behavior of the RC frame
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Highly Processable ester-functionalized polythiophenes as valuable multifunctional and post-functionalizable conjugated polymers
No full textA series of newly ester-substituted polyalkylthiophenes (PATEs) was prepared. All polymers were fully soluble in common
organic solvents, which allowed for a wide range of physico-chemical measurements, including solvato- and thermochromic,
thermal, microstructural and electrical (in neutral and doped state) analyses. Marked differences were observed in
the material characteristics of these polyalkylthiophene derivatives. It was thus possible to identify and describe the different
properties ascribable not only to the different esteric groups in side chain but also to the different average degrees of
functionalization of the thiophenic repeating units. In neutral state the PATEs of this study proved to be thermostable and
soluble, while at the same time exhibiting high ordered molecular assemblies leading to high average conjugation lengths,
electrical conductivities and stabilities. These polymers can also be easily and quantitatively transformed in other PAT
derivatives using simple nucleophilic reactions either in solution or in solid (film) state. In view of the above and given that
these polymers can be profitably and inexpensively synthesized, their future use for innovative applications in the field of
synthetic metals appears feasible as from now
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