1,721,075 research outputs found
Informatica. Tecnologia e cultura per il futuro dell'uomo.
No full textDopo un breve excursus sulla storia dell'informatica, si mostrano le acquisizioni recenti sul piano tecnologico e le influenze culturali, delineando per il futuro le prospettive di un "umanesimo tecnologico
Architettura dei Sistemi di Elaborazione - Vol. 2: Sistemi operativi, multiprocessori, sistemi distribuiti
No full textDocument Management for Collaborative e-Business: Integrating EBXML Environment and Legacy DMS
No full textIt is widely known that e-business capabilities are a key requirement for a large number of modern enterprises. New B2B technologies can enable companies all around the world to collaborate in more effective and efficient ways, better satisfying the needs of their customers. The ebXML specifications are the standard solution to achieve this kind of interoperability, but they are not as widespread as traditional legacy systems yet. Enterprises typically store their knowledge inside Document Management Systems (DMS), which come in different technologies and handle system-specific metadata models. In this paper, we propose an architecture that enables enterprises to take advantage of the power and flexibility of the ebXML approach to metadata management; this is achieved without affecting in-place working systems, and with no need for a complete repository reconstruction
Architettura dei Sistemi di Elaborazione - Vol.1: Fondamenti, Firmware, Architetture Parallele
No full text
Il progetto Ecumene
No full textThe article describes the project Ecumene, aimed to developing integrated tools for the representation and for the distribution of different sources of information on cultural heritage, particularly related to artistic obiects, to architectures, to librarian and archival units. The main results of the project are: firstly a conceptual model able to guarantee the integrated approach to the four types of mentioned descriptions and finally a web information system framework for the proper management of the metadata based on the model
MIPSD (Mobility-oriented IPSec Daemon): a Tool for Integrated Mobility and Security Support in the Ecumene Network
No full textThe IP protocol is stateless and connectionless, hence cannot guarantee a secure delivery of the information. IPSec offers stateful security introducing logical connections between couples of peers. The management of these IPSec Security Associations is often delegated to dynamic protocols, such as ISAKMP and IKE, because of the obvious scalability problem of a manual configuration approach. However, the address of each peer must be known in advance to the other one in order for the ISAKMP exchange to be completed successfully. This assumption cannot be always guaranteed, especially when mobility is taken into consideration. In such cases, a proper mechanism to retrieve the correspondent peer IPv6 address must be taken into account. The demo consists of an overview of the functionalities of the Ecumene Web Information System, developed in the groundwork of the Ecumene Project, focusing mainly on the enhancements developed (in the form of the MIPSD daemon) to allow automatic IPSec SA insaturation between hosts which wants to access the network and the appropriate Site Gateway
The Ecumene Experience to Data Integration in Cultural Heritage Web Information Systems
No full textA number of diverse data sources on cultural/artistic heritage, hosted by local institutions, may provide a rich collection of study material for experts in this field. Anyway, a wide exploitation of such a huge amount of information is hampered by the heterogeneity and the physical distribution of data sources. The experience presented here relates to problems and solutions found in making use of this kind of data sources within a single Web Information System that offers a framework for accessing the artistic/cultural information. In particular, design issues in dealing with metadata are discussed, as well as architectural aspects from the metadata harvesting to the presentation tier. All the system leverages the web infrastructure to cope with both organizational and technological diversity among the composing modules
An Experience in IPv6 Networking supporting Ecumene Web Information System for Cultural Heritage
No full textPeople interested in Cultural Heritage constitute a community of users characterized by a high degree of mobility. Users visiting cultural sites hosted by local institutions expect to access information pertaining to cultural/artistic heritage from anywhere at anytime, as they can through the desk at their own homes or offices. The Ecumene Web Information System, developed in the groundwork of the Ecumene Project, offers a framework for accessing the artistic and cultural information through a Web application. In this paper, we expose the underlying communication network architecture, based on the IPv6 protocol and investigate the benefits of its adoption, in terms of mobility and security support. Indeed, the need of granting different access rights to different user classes enforces the security requirements of the system. Lastly, the open issues related to the practical integration of an experimental testbed with Mobile IPv6 and IPSec support are detailed and possible solutions are presented
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