February, CYCLADES An Open Collaborative Virtual Archive Environment Umberto Straccia IEI-CNR (Italy)

February, Outline Project Overview Project Activities and Responsibility Project Schedule

February, Project Overview

February, (Preliminary: the scenario) DIGITAL ARCHIVE 1 DIGITAL ARCHIVE 2 DIGITAL ARCHIVE n Large, heterogeneous, multidisciplinary digital archives distributed over the Web Information sources User Communities/Groups of users Search & Browse

February, Project Goal Individual users Communities/Groups of users Development of an open collaborative virtual archive environment supporting interacting with Large, heterogeneous, multidisciplinary digital archives distributed over the Web

February, CYCLADES Virtual Archive Environment DIGITAL ARCHIVE 1 DIGITAL ARCHIVE 2 DIGITAL ARCHIVE n... Large, heterogeneous, multidisciplinary digital archives distributed over the Web User Communities/Groups of users Logical View

February, CYCLADES The Digital Archives CYCLADES functionality CYCLADES architecture

February, The Digital Archives CYCLADES will provide access to the Digital Archives compliant with the Open Archive Initiative

February, the Open Archives Initiative Agreement between several Digital Archives in order to provide interoperability The specs give data providers (individual archives) easy-to- implement mechanisms for making the documents metadata in their archives externally available This external availability then makes it possible for service providers to build higher levels of functionality FOR MORE INFO...

February, OAI: list of some compliant data providers ArchiveIDDescription arXiv physics, mathematics, non-linear systems and computer science clinmedClinical Medicine and Health Research Netprints CSTCComputer Science Teaching Center Digital library of peer-reviewed teaching resources for computer science educators HUBerlin Humboldt University at Berlin/Germany Document Server NACANACA Technical Report Server Scanned reports of the National Advisory Committee for Aeronautics ( ); the predecessor organisation to NASA. NCSTRL Networked Computer Science Technical Reference Library NDLTD Networked Digital Library of Theses and Dissertations WCRWeb Characterisation Repository database of meta-information relating to trace files, tools and publications that are relevant to characterisation of the World Wide Web

February, OAI specs: some functionality List Identifiers List Records Get Record –Example c&identifier=oai:arXiv:cond-mat/

February, Header: Identifier : oai:arXiv:cond-mat/ Datestamp : Metadata: oai_dc: title: Charge-ordering phase transition and order-disorder effects in the Raman spectra of NaV2O5 creator: Konstantinovic, M. J. creator: Isobe, M. creator: Ueda, Y. subject: Strongly Correlated Electrons; Disordered Systems and Neural Networks description: In the ac polarized Raman spectra of NaV2O5 we have found anomalous phonon broadening, and an energy shift of the low-frequency mode as a function of the temperature. These effects are related to the breaking of translational symmetry, caused by electrical disorder that originates from the fluctuating nature of the V {4.5+} valence state of vanadium. The structural correlation length, obtained from comparisons between the measured and calculated Raman scattering spectra, diverges at T< 5 K, indicating the existence of the long-range charge order at very low temperatures, probably at T=0 K. date: type: e-print identifier:

February, Large, heterogeneous, multidisciplinary digital archives CYCLADES Virtual Archive Environment... Common Interface Archive 2 Archive N Archive 1 Common Interface OAI Archives data providers service provider CYCLADES: as a service provider

February, DIGITAL ARCHIVE 1 DIGITAL ARCHIVE 2 DIGITAL ARCHIVE n... Large, heterogeneous, multidisciplinary digital archives Communities/Groups of users Functional View CYCLADES Virtual Archive Environment User Virtual Collection Search&BrowsePersonalizationRecommendationCollaboration

February, Virtual Collections (roughly) Virtual Collection: a set of metadata records collected together, according to some criteria, from the archives + set of functionality over records Archive 1 Common Interface Archive 2 Archive N Common Interface OAI Archives VC1 VC2 VC3 Virtual Collection Exported data

February, Search & Browse (roughly) Search: typical Search using the virtual collection s search fields (e.g. author, title, abstract) Query formulation through browsing VirtualCollection = Logic, Author = Straccia, Abstract = Fuzzy Logic Search Browse SchemaAttribute Author Abstract Title...Castelli Straccia Thanos...

February, Personalization (roughly) User topics of interest maybe managed similarly to folders Service learns the user information needs automatically New data is classified into the right topic folder automatically Information Retieval Umbertos folder Digital Libraries Logics for Uncertainity and Imprecision Fuzzy Logic Possibilistic Logic Probabilistic Logic

February, Collaboration (roughly) A shared working space can be created by groups referencing: –user documents –a virtual archive –recommendations, related links, annotations, ratings, … VC Shared working space Very interisting doc To be read Based on BSCW (Basic Support for Cooperative Work)

February, Recommendation (roughly) The user is automatically notified about new data that the system judges relevant User prefs + Group prefs = Recommendation

February, CYCLADES: Architecture (starting point) Modular –Basic functionality are allocated on servers Distributed –Servers maybe over the Web Open –new services can easily be added

February, Recommendation Service Collaborative Work Service Personalization Service Query & Browse Service Cyclades Mediator Service Collection Service Access Service OAI Archives Archive 1 Common Interface Archive 2 Archive N Common Interface US Side EU Side Users

February, Project Activities and Responsibilities

February,

February, Project Schedule

February,