Cooperative services are an increasingly popular way to deploy applications. In these services, computers controlled by different entities are supposed to work together to achieve a common goal, such as file-sharing [6, 12], mesh routing [2], and peer-to-peer backup [1, 7]. The resulting systems can be more fault-tolerant, scalable, and less expensive than traditional client-server approaches. ...

When there is no central administrator to control the actions of nodes in a distributed system, the users may deviate for personal gain. The BAR model describes the three types of nodes in these environments: Byzantine nodes deviate arbitrarily, Altruistic nodes follow the protocol, and Rational nodes deviate for gain. Previous attempts at writing BAR-Tolerant protocols have relied on a form of...

We are specifying and developing a flexible Web Service based framework that allows us to interactively combine components in order to meet the situationdependent dynamically changing requirements of blended learning. Our goal is to support instructors and students with customisable e-learning templates that are particularly close to their users and directly meet their needs in effective blende...

Cooperative and peer-to-peer services both seek to provide a way to scale services beyond what can be provided by even a high-end server machine. Cooperative services do this by treating a service as a parallel program and then running the program across a cluster of machines. Key challenges include rearchitecting services not only to provide good performance by balancing parallelism and locali...

Cooperative information systems are characterized by distribution, high heterogeneity and scale. Therefore they require interoperable, dependable services on top of which the development of cooperative application can take place. This paper studies, in the context of the Unitary Network of the Italian Public Administration, the problem of increasing the availability of the services exported by ...

The Digital Era is when all activities become efficient and effective by utilizing the results of technological developments in economy. Cooperatives as an economic-institutions can also take advantage business applications to improve service quality, which impacts in-creasing member satisfaction. This study aims produce information form a more in-depth explanation effect quality on satisfactio...

Current approaches to the development of cooperative information systems are based on services to be offered by cooperating organizations, and on the opportunity of building coordinators and brokers on top of such services. The quality of data exchanged and provided by different services hampers such approaches, as data of low quality can spread all over the cooperative system. At the same time...