1,720,971 research outputs found
On Brolin’s Theorem Over the Quaternions
Get PDFIn this paper we investigate Brolin's theorem over H, the skew field of quaternions. Moreover, considering a quaternionic polynomial p with real coefficients, we focus on the properties of its equilibrium measure: among others, the mixing property and the Lyapunov exponents of the measure. We prove a central limit theorem and we compute the topological entropy and measurable entropy with respect to the quaternionic equilibrium measure. We prove that they are equal considering both a quaternionic polynomial with real coefficients and a polynomial with coefficients in a slice but not all real. Brolin's theorems for the one-slice-preserving polynomials and for generic polynomials are also proved
On proper polynomial maps of C 2
Get PDFTwo proper polynomial maps f 1,f 2 :C 2→C 2 are said to be equivalent if there exist Φ 1,∈Φ 2 Aut(C 2) such that f 2=Φ 2 o f 1 o Φ 1. We investigate proper polynomial maps of topological degree d ≥2 up to equivalence. Under the further assumption that the maps are Galois coverings, we also provide the complete description of equivalence classes. This widely extends previous results obtained by Lamy in the case d=2. © 2009 Mathematica Josephina, Inc
Le misure tecnologiche di protezione del diritto d’autore
No full textIl contributo esamina in modo dettagliato e in chiave comparata la normativa in materia di tutela delle misure tecnologiche di protezione, con particolare riferimento alla legislazione internazionale, statunitense, comunitaria e italiana
Sul marginalismo della legge e gli equilibri del sistema: riflessioni in tema di autonomia privata e digital copyright
No full textIl contributo esamina criticamente la tendenza al ricorso a forme di private ordering nell'ambito della tutela delle opere dell'ingegno che va progressivamente affermandosi a livello transnazionale. A questo fine, vengono presi in esame, per un verso, il crescente ricorso a licenze di carattere permissivo volte a garantire all'utente una maggiore fruibilità delle opere (e.g. licenze Creative Commons, licenza GPL) e, per altro verso, il ricorso a misure tecnologiche di protezione da parte dei titolari dei diritti esclusivi sulle opere. In conclusione si propone un ripensamento del ruolo del public ordering secondo una "prospettiva antitrust"
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
DRM, contrattazione telematica e contrattazione mediante agenti software nella distribuzione B2C
No full textL'opera, che espone i contributi della ricerca svolta presso l'Università di Bolgna - CIRSFID, nell'ambito della ricerca PRIN 2003-2005, affronta le criticità legate all'uso negoziale dei Digital Rights Management (DRM), anche con tecnologie ad agenti software, per la conclusione del contratto e per la gestione dell'esecuzione delle prestazioni contrattuali aventi ad oggetto opere dell'ingegno distribuite in forma digitale tramite Internet
Mutual Belief Inferences in a Multi-Agent Setting
No full textStarting from the view that it is convenient to look to Artificial Agents (AA) as institutionally defined entities, and to AA communities as institutionally organised social collectivities, this paper develops a conceptual apparatus for reasoning with and about the sort of beliefs that AA’s have to entertain in order to guarantee appropriate mutual acknowledgment of their institutional attributes
- …
