1,720,978 research outputs found
Toward an audio digital library 2.0: Smash, a social music archive of shellac phonographic discs
No full textA New Actor-Based Structure for Distributed Systems
No full textIn this paper we propose a formal analytic graph- based description of zz-structures, an unusual, graphic-centric way of linking and organizing information. Starting from this formalized model, we make active and operative all the enti- ties of the system, obtaining an actor-based model, called AZ. The actors are organized in different hierarchical levels and cooperate in order to achieve common goals and solve prob- lems. In particular, the use of actor-based technology is helpful in enhancing distributed computing capabilities, and interop- erability in grid systems. The combination of zz-structures and of cooperation activities of different actor classes allows us to define dynamic virtual organizations and to analyze some of issues related to system topological evolutions
A State of Art Survey on ZigZag Structures
No full textZz-structures are particular data structures capable of rep- resenting both hypertextual information and contextual in- terconnections among different information.
The focus of this paper is to stimulate new research on this topic, by providing, in a state of the art survey, a short de- scription and comparison of all the material that, to the best of our knowledge, is related to zz-structures: infor- mal and formal descriptions, implementations, languages, demonstrations, projects and applitudes of zz-structures; in fact, despite their large use in different fields, the literature lacks of an exhaustive and up-to-date description of them
Active distributed framework for adaptive hypermedia
No full textNavigation through large hypermedia information spaces is complex and is an important application area for adaptive hypermedia systems. User navigation can be best supported when the design of the hypermedia system is embedded in an evolutionary process model that takes into account the decentralization of data sources and the variety of users. The paper deals with distributed frameworks for open hypermedia systems; it focuses on the design work done to make adaptive an existing actor-based architecture for hypermedia. The approach follows the initial design approach used in the definition of the hypermedia platform, i.e. the actor-based computational model. We present in detail the new actor classes and the cooperative schemes which allow adaptation within the resulting architecture
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
Visualizing Personalized Views in Virtual Museum Tours
Get PDFWe propose a multi-agent adaptive system to support tours of virtual museums. The system stores userspsila personalized views in zz-structures, particular data structures capable of representing both hypertext information and contextual interconnections among different information. We present an extension of the standard zz-structure model in terms of computational agents. These agents cooperate and collaborate in order to help users visualizing their personalized views. The power of this new model resides in the (partially limited) level of freedom users have for the dynamical choice, based on some present interest or necessity, of their navigational path inside the virtual museum
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