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Currently, Business Process Model and Notation (BPMN) has becoming one of the main languages for creating a description of processes and developing executable frameworks for the management of the process itself. In this context, one important aspect of process management is the possibility of process analysis and optimization, which many times relies on real data collected during the process execution...
Commercial cloud systems allow massively parallel execution of a computing task for little money. We want to exploit this economic opportunity by solving classical problems in Operations Research through complete enumeration, especially if these problems can be expressed as integer programming problems. We propose and evaluate here a data structure, Scalable Virtual Distributed Hashing, that autonomously...
Generator Circuit Breakers (GCBs) are commonly used in electrical power generation systems to protect key equipment such as transformers and generators from damage due to overload or short-circuit. However the interruption and feeding of high currents lead to the ablation of the electrical contact system of the breaker. This deterioration process needs to be monitored in order to guarantee the healthy...
Natural scientists use large scale sensor networks for gathering and analyzing environmental data. However, the implementation work requires expert programmers. The problem is complicated by limited battery lifetime, processing power and memory capacity of the nodes, because this requires a low-level programming language. Since scientists are used to analyzing data with spreadsheets, researchers have...
The paper describes a joint university-industry project aimed at defining hardware and software requirements for the development of a prototypical microgrid platform on existing sites able to manage generation resources and load. The paper describes an architecture developed for integrating existing software tools for on-line load monitoring and control and for management of in-site generation. The...
It is anticipated that by 2015 more than 75% of Information Technology infrastructure will be purchased as a service from service providers. Services will be hosted in virtualized shared resource pools referred to as Clouds. Service providers will need to ensure that customer performance requirements are satisfied while consuming an acceptable quantity of resources. This paper describes a Virtualization-aware...
Present and future semiconductor technologies are characterized by increasing parameters variations as well as an increasing susceptibility to external disturbances. Transient errors during system operation are no longer restricted to memories but also affect random logic, and a robust design becomes mandatory to ensure a reliable system operation. Self-checking circuits rely on redundancy to detect...
Error correction is an effective way to mitigate fault attacks in cryptographic hardware. It is also an effective solution to soft errors in deep sub-micron technologies. To this end, we present a systematic method for designing single error correcting (SEC) and double error detecting (DED) finite field (Galoisfield) multipliers over GF(2m). The detection and correction are done on-line. We use multiple...
A high bandwidth critical path monitor (1 sample/ cycle at 4-5 GHz) capable of providing real-time timing margin information to a variable voltage/frequency scaling control loop is described. The critical path monitor tracks the critical path delay to within 1 FO2 inverter delay with a standard deviation less than 3 FO2 delays over process, voltage, temperature, and workload. The CPM is sensitive...
According to the specified standard of airborne Photogrammetry, digital airborne cameras must have higher performance than ordinary civil cameras, which must shoot with shorter time interval and will generate huge data stream. In this paper, a digital airborne camera is designed and implemented in a single FPGA chip as a SOPC approach. The functions of image acquisition, storage and display are implemented...
The maintenance strategy for marine generators is a key factor that affects ship safety and economic benefits. In this paper, on the basis of marine maintenance system theories, by analyzing maintenance after a failure event, preventive maintenance, and condition based maintenance, and so on, a ship maintenance strategy and the corresponding processes are constructed. A risk assessment is made using...
In this study, we fabricated in-plane thermoelectric micro-generators (4 mm times 4 mm) based on bismuth telluride thin films by using flash evaporation method. The thermoelectric properties of as-grown thin films are lower than those of bulk materials. Therefore the as-grown thin films were annealed in hydrogen at atmospheric pressure for 1 hour in a temperature range of 200 degC. to 400degC. By...
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