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Digital documents are likely to have problems associated with the persistence of links, especially when dealing with references to external resources. People keep track of various webpages of their interest using distributed digital collections and without possession of these documents; the curator cannot control how they change. In the current context, managing these distributed digital collections...
Smart grids have been proposed as a mechanism to modernize energy grids. In a smart grid, sensors, computers and communication networks are integrated into the power generation, transmission, distribution, and load elements. In this paper, we propose a cloud-based brokerage and analytics support system for smart grids, discuss a framework for implementing service level agreements in smart grids, and...
Understanding human behavior is central to many professions in engineering, health and the social sciences, and has typically been measured through surveys, direct observation and interviews. However, these methods are known to have drawbacks, including bias, problems with recall accuracy, and low temporal fidelity. Recently, a new tool has been employed to great effect: the smartphone. Modern mobile...
Sustainable energy sources such as renewable energies are replacing dirty sources of energy in order to address the environmental challenges of the century. In order to operate data centres with renewable energies we have to mitigate their volatile and variable nature. In this paper, we present the Energy Adaptive Software Controller (EASC), a generic software controller and interface that developers...
Future space missions call for innovative computing system architectures, meeting strict requisites of size, weight, power consumption (SWaP), cost, safety and timeliness. To answer the aerospace industry interests, especially the European Space Agency (ESA), the AIR (ARINC 653 in Space Real-Time Operating System) architecture has been defined, following the advanced notion of time and space partitioning...
Aerospace systems have strict dependability and real-time requirements, as well as a need for flexible resource reallocation and reduced size, weight and power consumption. To cope with these issues, while still maintaining safety and fault containment properties, temporal and spatial partitioning (TSP) principles are employed [4]. In a TSP system, the various onboard functions (avionics, payload)...
The emerging computational grid infrastructure consists of widely distributed heterogeneous resources, which makes mapping of increasingly complex applications a very challenging task. Utility Management Systems (UMS) manage large number of workflows with high resource requirements and thereby optimization of resource utilization has to be adapted. In this work we propose the architecture that implements...
This paper designs the ScGridBroker as an scheduler of ScGrid that uses grid technology for managing large-scale distributed resources based on Economic Scheduling Algorithms. It discusses a layered and component-oriented modular architecture for the broker design and development. The architecture is generic enough to leverage services provided by various Grid middleware systems such as Globus, Legion,...
We consider the case of sparse mobile sensors deployed to implement missions in challenging environments. This paper explores a notion of tour networks that is well suited to circumstances in which autonomous sensing agents cannot rely on standard networking abstractions and must create their own opportunities for communication and interaction. Tours are high-level building blocks that combine motion,...
Cryptographic devices are recently implemented with different countermeasures against side channel attacks and fault analysis. Moreover, some usual testing techniques, such as scan chains, are not allowed or restricted for security requirements. In this paper, we analyze the impact that error detecting schemes have on the testability of an implementation of the advanced encryption standard, in particular...
Multi-core SoC created great opportunities to increase overall system performance while keeping the power in check but also created many design challenges that designers must now overcome. The challenge of doubling performance every two years used to drive superscalar design with more functional units running concurrently or deeper pipeline racing for highest frequency at the cost of higher power...
A generic test process should support all approaches "formal to informal" and mixed approaches within, and across, all test levels. But widely-accepted formal approaches, from current standards, certification syllabi and tools, have explicitly-defined test cases as the key underlying entity: not all real-life approaches use explicit test cases. Also, testing is maturing beyond merely "finding...
Due to the continuously growing possibilities provided by technology and its wider application, today's IT products are becoming more and more complex both from technical and managerial standpoints. Very often, multiple parties are involved in their development. Consequently, the organization of the integration and testing of these products gets increasingly complex. Organisations already encounter...
A process is an important concept in modern software development. Only when the activities are organized in process descriptions, can these be communicated, followed, observed, and improved. The basis for understanding what testing is, is therefore the understanding of the testing process. This paper presents the general concept of a process, and expands on this to present a suggestion for a generic...
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