1,720,997 research outputs found
b-Generalized Skew Derivations on Multilinear Polynomials in Prime Rings
No full textLet R be a prime ring of characteristic different from 2, Qr be its right Martindale quotient ring and C be its extended centroid. In this paper we define b-generalized skew derivations of prime rings. Then we describe all possible forms of two b-generalized skew derivations F and G satisfying the condition F(x)x − xG(x) = 0, for all x ∈ S, where S is the set of the evaluations of a multilinear polynomial f(x1, ..., xn) over C with n non-commuting variables. Several potential research topics related to our current work are also presented. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG
Certain functional identities involving a pair of generalized skew derivations with nilpotent values on Lie ideals
No full textLet R be a prime ring of characteristic different from 2, Q(r) its right Martindale quotient ring, L a non-central Lie ideal of R (i.e., L,R not equal 0), n >= 1 a fixed integer, F and G two generalized skew derivations of R, associated with the same automorphism alpha of R. If (F(xy)-G(x)y)(n) = 0, for any x,y is an element of L, then there exists a is an element of Q(r) such that , for any x is an element of R, unless when R satisfies the standard polynomial identity s(4)(x(1), ..., x(4))
Progettazione ecocompatibile dell'architettura
No full textIl volume si pone come principale obiettivo quello di fornire concetti, strumenti, metodi e criteri di scelta nella progettazione per diffondere, nella prassi progettuale, la cultura dell'approccio ecocompatibile integrato nelle diverse fasi di progetto e alle diverse scale . E' fondamentale, oggi, che l'ottimizzazione delle scelte funzionali, tecnologiche e morfologiche che fa riferimento alle fasi di concezione-metaprogetto, progetto preliminare, definitivo ed esecutivo debba essere finalizzata oltre che alla coerente integrazione con il clima, anche all'uso razionale di tutte le altre risorse ambientali e alla loro salvaguardia. Tale approccio ha portato quindi, a considerare nel testo anche oltre al clima tutte le risorse ambientali quali l'acqua, il verde, il suolo nochè tutti i flussi di materia ed energia nell'intero ciclo di vita dell'edificio.
Il testo riporta in alcuni capitoli gli esiti di ricerche svolte sia di tipo teorico che sperimentale sul campo.
The book aim is to disseminate sustainability design approach describing principles, tools and methods, choose criteria related to the design phases and different scales. To day the optimization of technological, functional and morphological design choices in the preliminary, definitive and executive project must be related not only to climate, but also to the others environmental resources as water, vegetation and soil, materials into the whole life cicle.
The volume into some parts makes reference to theoretical and experimental research results
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
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
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