306,249 research outputs found
[Recensione a] Alessandro Barbone, Musica e filosofia nel pitagorismo
No full textALESSANDRO BARBONE,Musica e filosofia nel pitagorismo, prefazione di B. Centrane, Napoli, La scuola di Pitagora editrice, 2009 (Pythagorea, 1), 168 pp
[Recensione a] Alessandro Barbone, Musica e filosofia nel pitagorismo
No full textALESSANDRO BARBONE, Musica e filosofia nel pitagorismo, prefazione di B. Centrane, Napoli, La scuola di Pitagora editrice, 2009 (Pythagorea, 1), 168 pp
Hydrological constraints to macrobenthic fauna biodiversity in transitional waters ecosystems
No full textLagoons are habitat islands in the coastal landscapes characterised by heterogeneity among ecosystems, due to the different terrestrial-freshwater- marine interfaces, as well as by heterogeneity within an ecosystem, due to an intrinsic patchy spatial distribution of abiotic and biotic components. Here, we investigated the influence of nine hydrological forcing factors of the patchiness of a lagoon benthic macroinvertebrates, described through macroinvertebrate diversity. This study is based on the analysis of two databases built, respectively, upon (1) a literature survey (ITA-DB) carried out considering a 25-year period and (2) a series of sampling campaigns during 2004-2005 in ten Mediterranean and Black sea lagoons (CaD-DB). Both databases showed a patchy distribution of macroinvertebrate taxa among lagoons with most taxa found in one or two lagoons only. Average similarity in taxa composition among lagoons revealed to be low for both ITA-DB (10%) and CaD-DB (11%), showing that macroinvertebrate taxonomic diversity is strictly linked to large-scale phenomena. Regression trees models indicate that 60.0% (ITA-DB) and 42.3% (CaD-DB), respectively, of total deviance of the macroinvertebrates diversity are explained by physiographical and hydrological factors, being openness and tidal range the two most relevant components. Therefore, hydrological constraints in the connection between lagoon and marine ecosystems seem to have a relevant role in the organisation and maintenance of benthic macroinvertebrate fauna of coastal lagoons. In order to design strategies of biodiversity conservation in Mediterranean transitional waters one suggested direction is a coordinated, inter-country governance, rather than a purely local management. © 2010 Springer-Verlag
Conoscenze e comportamenti rispetto alla prevenzione e controllo del rischio biologico nelle attività ambulatoriali sanitarie ed estetiche in ambito distrettuale
No full textEffetto di sostanze ad azione psicotropa (farmaci e droghe di abuso) sulla capacita' di guida.
No full textStrumenti e tecniche dell’epidemiologia
No full textTra le discipline della sanità pubblica, l’epidemiologia ha il ruolo di misurare con metodo osservazionale quantitativo l’insorgenza delle malattie e il verificarsi degli infortuni fornendo contemporaneamente la chiave di interpretazione rispetto a possibili relazioni causa-effetto. I primi strumenti di lavoro dell’epidemiologo sono le misure di frequenza, di associazione e di impatto. Queste possono derivare da disegni di studio anche molto diversi a seconda delle caratteristiche della storia naturale degli eventi sanitari e della capacità di valutare l’esposizione, le modificazioni dello stato di salute e gli esiti nei momenti in cui questi si verificano oppure retrospettivamente. Strumenti e tecniche diverse sono utilizzate nel caso le informazioni relative a esposizione e condizione di salute siano acquisite a livello di individuo piuttosto che di gruppo determinando la scelta del metodo tra l’epidemiologia analitica e quella di valenza ecologica. In particolare nell’epidemiologia occupazionale, sostanziali differenze di approccio sono necessarie in funzione della lunghezza del periodo che intercorre tra inizio dell’esposizione, insorgenza biologica della malattia o infortunio, diagnosi e esito
Umberto Barbaro e il "realismo" della letteratura
No full textCon "L'essenza del can barbone" Umberto Barbaro dà corso a quella forma di realismo di tipo sperimentale che costituì negli anni Trenta la più vera matrice del neorealismo, parola, quest'ultima usata fra i primi proprio dall?autore e critico siciliano in ambito cinematografico. La raccolta di novelle è un importante esempio di impegno letterario di tipo anti rondista, ma debitore alla tradizione di una ricerca linguistica e formale molto accorta
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
"La nostra esperienza nel trattamento delle complicanze polmonari nel paziente ustionato"
No full textTwo error bounds for dynamic condensation methods
No full textThe dynamic response of large structural systems is often approximated by condensing the systems into smaller subspaces. Among condensation methods, modal condensation and Krylov projection methods have the capability of generating excellent approximations of the response in a selected frequency band. Here are presented error bounds on the response in the band to complement these and other Galerkin Rayleigh–Ritz condensation methods. The bounds guarantee that the magnitude of the error is below the computed threshold. They are based on the expansion of exact expressions of the error using interior and exterior eigenpairs. The interior error is bounded by using existing error bounds on the interior eigenpairs. Sylvester’s theorem allows one to determine if all interior eigenvalues are approximated. The exterior error is bounded by using the Cauchy–Schwarz inequality and matrices that bound the restriction of the system matrix to the exterior eigenpairs. Two general algorithms are presented as a general framework to compute bounds on the eigenpairs and bounds on the error and the response. They can be specialized to particular implementations of Rayleigh–Ritz and/or Krylov methods. The application of the bounds is illustrated on a variety of condensation methods and problems
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