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In this study we analyzed the curricula of 65 university students to investigate the impact of activities progression on student performances. Clustering curricula based on activity order and type we discovered a significant incidence on performance, validating the predictive power of curricula. Nevertheless, we discovered that the characterization of clusters is mainly due to non mandatory activities,...
This work adresses the problem estimating correlations between process observables and KPI/SLA violation metrics. This analysis is aimed at providing business process owners with a suggestion of potential causality between groups of process parameters and violations. Obviously, static regression analysis cannot establish causality. We introduce a notion of Behavioral Analysis of business process instances...
Accurate and lightweight evaluation of web service security properties is a key problem, especially when business processes are dynamically built by composing atomic services provided by different suppliers at runtime. In this paper, we tackle this problem by proposing a security certification approach that virtually certifies a composite service for a set of security properties, starting from certificates...
Bringing sensor- and context-awareness to the Web promises to open new, tremendous business opportunities. However, context-awareness involves difficult problems such as modeling social / human affairs (e.g. law, personal preferences, etc.), handling incomplete information, and managing uncertainty of sensor data. We argue that fully-fledged, Semantic-Web-style reasoning in presence of uncertainty...
Security certification schemes for Service-Oriented Architecture~(SOA) extend service specifications with the evidence that a service supports a set of security properties and provides a given level of assurance. However, services are subject to continuous refinements, and uncontrolled changes can easily invalidate existing certification results and require re-certification from scratch, with high...
We present a solution for test-based security certification of services that models the service under certification using a Symbolic Transition System (STS). The STS-based model is readily derivable from the Web Service Description Language (WSDL) and Web Service Conversation Language (WSCL) of the service, and can be enriched with details about test-based conditions on inputs and outputs, implementation...
Business intelligence platforms enable users to build applications that help organizations in their decisional processes. This segment of ICT market is extremely dynamic and see a strong competition between different vendors of commercial products, both pure-play vendors as Business Objects and Cognos and large application and software infra-structure vendors as Microsoft and Oracle. In the last few...
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