1,720,984 research outputs found
Borello, M. E.— Evolutionary restraints. The contentious history of group selection. The University of Chicago Press, Chicago & London, 2012
No full textErard Christian. Borello, M. E.— Evolutionary restraints. The contentious history of group selection. The University of Chicago Press, Chicago & London, 2012. In: Revue d'Écologie (La Terre et La Vie), tome 67, n°4, 2012. pp. 460-461
L’eclettismo di un ingegnere civile tra ’800 e ’900. Giacinto Tosi e i portici della piazza di Moncucco
No full textSmall Strong Blocking Sets by Concatenation
No full textStrong blocking sets and their counterparts, minimal codes, have attracted much attention in the past few years. Combining the concatenating construction of codes with a geometric insight into the minimality condition, we explicitly provide infinite families of small strong blocking sets, whose size is linear in the dimension of the ambient projective spaces. As a byproduct, small saturating sets are obtained
On ideals in group algebras: An uncertainty principle and the Schur product
Full text linkIn this paper, we investigate some properties of ideals in group algebras of finite groups over fields. First, we highlight an important link between their dimension, their minimal Hamming distance and the group order. This is a generalized version of an uncertainty principle shown in 1992 by Meshulam. Secondly, we introduce the notion of the Schur product of ideals in group algebras and investigate the module structure and the dimension of the Schur square. We give a structural result on ideals that coincide with their Schur square, and we provide conditions for an ideal to be such that its Schur square has the projective cover of the trivial module as a direct summand. This has particularly interesting consequences for group algebras of p-groups over fields of characteristic p
The Mobius function of PSL (3, 2 p) for any prime p
No full textLet G be the simple group PSL(3, 2p), where p is a prime number. For any subgroup H of G, we compute the Mobius function μ(H) of H in the subgroup lattice of G. To this aim, we describe the intersections of maximal subgroups of G. We point out some connections of the Mobius function with other combinatorial objects, and, in this context, we compute the reduced Euler characteristic of the order complex of the subposet of r-subgroups of PGL(3,q), for any prime r and any prime power q
Il consumo di italiano per stranieri
No full textIl saggio è inserito in un volume collettaneo che intende fare il punto su domanda e offerta di consumo linguistico in Italia, per poi concentrarsi sull’ambito che oggi meglio può non solo rispondere a una richiesta culturale e sociale, ma anche, dal punto di vista della didattica della lingua, può aumentare la qualità dell’insegnamento delle lingue: l’applicazione diffusa della formazione a distanza.
Il contributo occupa tutta la seconda parte del volume e si articola in due capitoli: “Il pubblico dell’italiano L2” e “L’offerta di italiano L2” che analizzano le principali caratteristiche del pubblico che necessita e chiede formazione linguistica in italiano e le principali risposte che sono state date e che si sono sviluppate in modo significativo negli ultimi quindici anni.
I numerosi dati raccolti dimostrano che i cambiamenti del pubblico negli ultimi quindici anni sono sia quantitativi, sia qualitativi, e l’offerta di formazione si sta adattando a questa nuova situazione: la massa di immigrati sempre più stabili in Italia richiede strumenti di integrazione anche linguistici, che li portino oltre una competenza comunicativa legata alla soluzione estemporanea di problemi comunicativi quotidiani, per poter utilizzare le proprie competenze linguistiche per l’autorealizzazione; gli stranieri che vengono a studiare nel nostro paese sono una realtà significativa, grazie anche ai programmi di scambio europei, e i loro bisogni linguistici non possono essere interpretati solo come necessità di lingua per comunicare in situazioni di vita quotidiana ma anche come necessità di linguaggi specialistici e di competenze in specifiche abilità; in un paese che è da sempre visto come la culla dell’arte e della cultura, il turismo per studio deve uscire dall’indeterminatezza per ricevere un riconoscimento ufficiale anche quando sono strutture istituzionali a rispondere ai loro bisogni linguistici; il mondo del lavoro globalizzato richiede sempre più spesso competenze linguistiche e microlinguistiche specifiche costruite attraverso percorsi originali di formazione, certificate e documentate
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
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