130,322 research outputs found
Collezioni della Dotazione Basile
No full textLa Dotazione Basile è costituita dal materiale documentario delle attività professionali e scientifiche degli architetti Giovan Battista Filippo Basile (Palermo 1825 – 1891) ed Ernesto Basile (Palermo 1857 – 1932), padre e figlio; tale materiale è stato donato all’inizio degli anni Cinquanta dalla famiglia Basile alla Facoltà di Architettura dell’Università degli Studi di Palermo. Ad esso successivamente sono stati aggregati altri due fondi: nel 1971 l’Archivio Ducrot, relativo prevalentemente alla documentazione fotografica e grafica dell’attività produttiva del celebre mobilificio palermitano; nel 1992 le trentaquattro Tavole Didattiche, fatte realizzare negli anni Ottanta del XIX secolo da G. B. F. Basile su suoi studi e schizzi (eseguite da Michelangelo Giarrizzo su supporti di tela di m. 2,40 x 1,96) e collocate originariamente nell’Aula Magna della Regia Scuola per Ingegneri e Architetti di Palermo (restaurate nel 1992 con finanziamento della Provincia Regionale di Palermo)
Numerical modeling of current-voltage characteristics to extract transport properties of organic semiconductors
No full textThe current vs. voltage (I-V) characteristics of single crystal rubrene Organic Field-Effect Transistors (OFETs) and polycrystalline poly(p-phenylenevinylene) (PPV) films are modeled using the polaron transport theory presented in a previous work [A. F. Basile et al., J. Appl. Phys. 115, 244505 (2014)]. The model is first applied to rubrene OFETs, where transport is two-dimensional
and is confined near the interface between the insulator and the organic semiconductor. By considering the effect of image charges in the insulator and by assuming a constant intrinsic mobility, we reproduce both the positive and the negative temperature dependences of the channel mobilities
measured on OFETs having a gate dielectric and an air-gap insulator, respectively. In addition, we adapt this model to the three-dimensional transport in PPV films, characterized by effective mobilities which depend on temperature, charge density, and electric field. We show that the I-V
characteristics of these materials can be matched by the numerical solution of the Poisson and drift-diffusion equations assuming a constant intrinsic mobility. The polaron binding energy can account for the thermally activated behavior of the I-V characteristics and for the increase of the effective mobility at high applied voltages. Therefore, this model enables to extract the intrinsic transport parameters of organic semiconductors, independent of the device structure, and of the measurement conditions. VC 2014 AIP Publishing LLC
How do dwarfing rootstocks control fruit tree vigor? (Is it about hormones, nutrients, carbohydrates or water?)
No full textMost commercial temperate fruit trees are compound trees made up of two different genotypes; a scion and a rootstock. Increasingly, rootstock genotypes are chosen for their ability to reduce or control the growth of the scion. Although modern fruit production is becoming increasingly dependent on “size-controlling” rootstocks, there is still not unanimous agreement or clear understanding of the mechanisms involved in the size-controlling effects that specific rootstocks have on scion growth. There are several theories about the mechanisms involved in causing the size-controlling behavior of scions on dwarfing rootstocks. These theories were presented in a recent review by Basile and DeJong (2019), and the objective of this talk will be to review these theories and provide some clarity about which theories appear to be most likely to be involved. The most common theories fall into the following categories: semi-incompatibility, hormone/signaling, nutritional, water relations, carbohydrate storage/mobilization/transport, and competition/architecture. Most of these theories are not mutually exclusive, and several mechanisms may be active in a given rootstock/scion combination to a greater or lesser extent. The nutritional theory appears a bit weak because, if it is in play, it should be able to be overcome by increasing the supply of nutrients preferentially to either the rootstock or the scion to overcome the relative dwarfing effect. Although the hormone/signaling theory is probably the most widely accepted among horticulturists, it is fairly weak because most evidence for it comes from associative experiments in which hormone or growth regulator concentrations are associated with growth activity. However, it is not known whether the hormone concentrations cause the observed growth effects or are a result of them. A theory that has substantial empirical evidence to support it is based on differences in xylem anatomy that affect tree water relations
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
Tracce d’autore: Giovan Battista Basile e il narratore di tradizione orale
No full textIl saggio prende le mosse dalla figura di B. B. Basile e del suo contributo alla fortuna letteraria della fiaba, alimentata dalla lettura crociana da un lato, e dal primato della letteratura, centrata sulal figura dell'Autore, sulla tradizione orale, vivificata dalla figura del narratore. Ricollocata la materia prima della rielaborazione artistica di G. B. Basile nel suo contesto primario, di circolazione orale, emerge come la tradizione di studio del racconto sia stata orientata da parametri propri della letteratura, a privilegiare lo studio del testo - con il gap prodotto dall'assenza dell'autore- mentre una corretta comprensione della pratica narrativa, delle sue funzioni sociali e delle sue connotazioni indubbiamente artistiche, avrebbe dovuto concentrarsi sull'evento racconto, mettere a fuoco gli stili e le figure del narratore, nel suo ruolo di interprete/attore di competenze di natura artistica che solo con il paradigma dell'antropologia del racconto e del racconto come arte verbale, sarebbero venute ad arricchire lo strumentario antropologico per lo studio della narrazione.
Sviluppando alcuni nodi di natura teorico-metodologica (comparazione, trascrizione, tecniche di documentazione), il saggio propone in un contesto di analisi storico-letteraria, il contributo dell'antropologia della narrazione come risorsa per un ampliamento delle concezioni estetiche ed un allargamento degli orizzonti conoscitivi in merito alle molteplici opportunità di vita delle forme d'arte verbale
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Per il Basile italiano: "La Venere addolorata"
No full textNel saggio si analizza un "libretto" melodrammatico di G.B. Basile, piuttosto ignorato dalla critica, nei suoi rapporti con la corte Gonzaghesca e con i poeti contemporanei, particolarmente Marino.The essay concerns an operatic libretto by G. B. Basile, a very interesting text that critics have almost been ignoring. The point of view is oriented towards the relationship with Gonzaga's Court and the other coeval poets
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