Dependability of software, a major concern in many computer applications, can be improved through several means. But systematic approaches for its evaluation do not exist, which is the prerequisite for dependability control and improvement. Software dependability evaluation is an urgent problem to be solved. There is some subjectivity about weighting coefficient when applying fuzzy comprehensiv...

The ascendance of networked information in our economy and daily lives has increased the awareness of the importance of dependability features. OLTP (On-Line Transaction Processing) systems constitute the kernel of the information systems used today to support the daily operations of most of the business. Although these systems comprise the best examples of complex business-critical systems, no...

A paper to submit for International Workshop on Object-Oriented Real-Time Dependable Systems. This article discusses the extension of a distributed object-based paradigm the ANSA Architecture and its example implementation ANSAware for real-time applications. It reviews some of early experiences in the design, implementation and performance evaluation of two ANSA-based real-time system environm...

Analytical and simulative modeling for dependability and performance evaluation has been proven to be a useful and versatile approach in all the phases of the system life cycle. Indeed, a widely used approach in performability modeling is to describe the system by state space models (like Markov models). However, for large systems, the state space of the system model may result extremely large,...

Curriculum-based measurement of reading (CBM-R) is used to estimate oral reading fluency. Unlike many traditional published tests, CBM-R materials are often comprised of 20 to 30 alternate forms/ passages. Historically, CBM-R assessment materials were sampled from curricular materials. Recent research has documented the potentially deleterious effects of poorly controlled alternate forms on CBM...

This work presents an integrated solution composed of a methodology, methods, representation models, optimization models and a tool, for the planning of private cloud infrastructures, considering aspects of performance, dependability, performability and cost. The proposed optimization models are based on the GRASP metaheuristic for generating private clouds infrastructure scenarios. The model f...

Grid computing presents a new trend to distributed and Internet computing to coordinate large scale resources sharing and problem solving in dynamic, multi-institutional virtual organizations. Due to the diverse failures and error conditions in the grid environments, developing, deploying, and executing applications over the grid is a challenge, thus dependability is a key factor for grid compu...

Systems of Systems (SoS) present challenging features and existing tools result often inadequate for their analysis, especially for heteregeneous networked infrastructures. Most accident scenarios in networked systems cannot be addressed by a simplistic black or white (i.e. functioning or failed) approach. Slow deviations from nominal operation conditions may cause degraded behaviours that sudd...