1,721,117 research outputs found
A graph-dynamical interpretation of Kiselman’s semigroups
No full textA sequential dynamical system is a quadruple (Γ,Si,fi,w) consisting of a (directed) graph Γ=(V,E), each of whose vertices i∈V is endowed with a finite set state Si and an update function fi:∏j,i→jSj→Si—we call this structure an update system—and a word w in the free monoid over V, specifying the order in which update functions are to be performed. Each word induces an evolution of the system and in this paper we are interested in the dynamics monoid, whose elements are all possible evolutions. When Γ is a directed acyclic graph, the dynamics monoid of every update system supported on Γ naturally arises as a quotient of the Hecke–Kiselman monoid associated with Γ. In the special case where Γ=Γn is the complete oriented acyclic graph on n vertices, we exhibit an update system whose dynamics monoid coincides with Kiselman’s semigroup Kn, thus showing that the defining Hecke–Kiselman relations are optimal in this situation. We then speculate on how these results may be extended to the general acyclic case
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
Strategie di sviluppo di aziende da latte in collina e montagna
No full textL’obiettivo di questo studio consiste nell’analisi dei costi, dei ricavi, dei punti di forza e di debolezza di differenti tipologie di aziende zootecniche bovine da latte di collina e montagna, caratterizzate da differenti tecniche di allevamenti e differenziati canali di vendita del prodotto. Lo studio permette di valutare quanto i cambiamenti tecnici e commerciali adottati da queste aziende possano ricondursi alle modificazioni in corso anche in altri contesti ambientali e di mercato
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
La cultura letteraria tra classicismo e avanguardia
No full textAll'indomani dell'Unità d'Italia la tradizione classicistica delle antiche Legazioni di Romagna viene idealmente a integrarsi con la chiamata di Carducci all'Università di Bologna. Il suo magistero poetico non è però né miope né pedante, perché anzi la sua partrecipazione attiva alla vita politica della città favorisce, nella sua scuola, il sorgere di una generazione di critici e giornalisti che animano i circoli culturali della città e l'editoria bolognese, contrassegnata dalle fortune di Zanichelli e Cappelli. Mentre in Romagna si vengono a distinguere due tipi di autori, quelli che celebrano un ideale di vita semplice e modesta (Panzini, Moretti) e quelli che esaltano il carattere ardente e ribelle (Oriani, Beltramelli), a Bologna, più che il romanzo, osteggiato da Carducci, attecchiscono il genere del racconto breve (con Albertazzi, Panzacchi e Valgimigli) e la poesia (con Guerrini e Ferrari), mentre Pascoli, tornato a Bologna, si sforza di diventare l'erede di Carducci cimentandosi nelle Odi e negli Inni di intonazione civile e patriottica, ma senza eroismi. Il quadro della letteratura di primo Novecento si chiude con l'analisi della critica letteraria di Renato Serra, con i caratteri della lirica del ferrarese Govoni e con le prime avvisaglie regionali del movimento futurista
La cultura dello spettacolo a Bologna
No full textAnalisi della situazione dal 1859 al 1911 riscontrata su documenti di archivio circa la vita dei teatri, le feste pubbliche, civili e religiose, i carnevali e la tradizione Wagneriana a Bologna
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