1,721,283 research outputs found
Nuove tecnologie per il monitoraggio della vegetazione. Indici di vegetazione a confronto per un sensore a bassa risoluzione spaziale
No full textPrediction markets
No full textNella difficile arte di prevedere il futuro, o meglio di attribuire probabilità agli eventi futuri, si cimentano i prediction markets, il cui archetipo è rappresentato dall’IEM, l’Iowa Electronic Market, un mercato sperimentale citato da Vernon Smith nella sua Nobel lecture del 2002.
Per decenni chi si occupa di intelligenza artificiale ha cercato di costruire sistemi intelligenti scrivendo software che replica i processi del pensiero umano. Più recentemente - e l’IEM lo dimostra - i ricercatori hanno tentato di risolvere problemi complessi costruendo reti di agenti autonomi che interagiscono tra di loro. L’idea-chiave per costruire sistemi intelligenti sembra essere quella di “far leva” sui singoli individui - collegati tra loro da sistemi informatici - e utilizzare in modi innovativi le loro capacità intellettive.
Questioni di pubblico interesse possono essere risolte attraverso meccanismi simili a quelli dei mercati in cui si negoziano titoli. La soluzione proposta è quella di creare mercati in cui le risposte, giuste e sbagliate, hanno conseguenze economiche. L’ipotesi è che questi mercati tenderanno ad amplificare la voce di chi è nella migliore posizione per conoscere la risposta esatta. È anche possibile che la stessa esistenza di questi mercati stimoli i partecipanti a cercare infor-mazioni che possano migliorare le loro risposte.
Il motivo per cui quest’idea dovrebbe funzionare è che i “meno informati” perderanno denaro e presto saranno esclusi mentre i “più informati” guadagneranno e tenderanno a “guidare” il mercato, determinandone i prezzi
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
Galleria Civica d'Arte Contemporanea. Termoli . Catalogo Generale
No full textRiordino ,analisi critica e schedatura delle 450 opere di artisti italiani dal secondo dopoguerra ad oggi presenti nella collezione della Galleria Civica d'arte contemporanea di Termoli. Analisi della storia del "Premio Termoli", origine della collezione; presentazione e riodrino dei dati d'archivio e a stampa riguardanti il Premi
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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