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May 27, 2014 | Thermal simulation of complex circuits a success

Docea Power, which has a joint lab with CEA LIST, recently demonstrated the precision of its thermal simulation modelling software for complex integrated circuits at the 2014 Design Automation Conference in the United States.

Docea Power used the Sthorm 64-processor architecture, which is used to run a people-detection and counting application, for the demonstration. Docea Power compared a Sthorm-based thermal behavior simulation leveraging its own software with actual temperature measurements taken on a chip in operation. The margin of error was under 15%, good enough to validate a proposed thermal management strategy.

The demo marks a major step forward for Docea Power. The company is now that much closer to developing software capable of assessing the thermal behavior of complex circuits in the very early design phases rather than after the fact. The early-stage insights will minimize the impact of heat-related phenomena on performance and reliability and help reduce the costs associated with over-sizing chip packaging, all without affecting time to market. Other uses for the software are already under consideration, like studying the effects of heat-related phenomena on aging.

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May 21, 2014 | Grenad proven effective for distributed energy systems

CEA LIST’s Grenad modelling software came through recent eco-neighborhood simulations with flying colors. The software developed load shedding strategies to reduce peaks in electricity consumption, ensured locally-produced electricity was used first, and reduced the neighborhood’s overall carbon footprint. The simulations were completed in the first half of 2014 under the Oseo-financed Edens project and the EU FP7 Resilient project.

201411 02The simulations entailed developing a detailed model reflecting the actual complexity of an eco-neighborhood, with multiple separate buildings, energy producers, energy grids, and energy storage systems. Grenad’s multi-agent technology, particularly well-suited for modelling complex distributed systems, was able to take into account factors like:

- Multiple agents like producers, consumers, and storers, with varied behaviors

- Several layers of energy flows, with electricity, thermal energy, etc.

- Multiple decision-making criteria like cost reduction, priority to locally-produced energy, etc.

With these successful simulations under its belt, Grenad will now be implemented in real-life conditions at existing sites for validation. Developers will continue tweaking the software to make it more robust and secure.



April 17, 2014 | Version 2 of Civa ultrasonic guided wave inspection module available

CEA LIST’s Civa, the world’s leading non-destructive testing simulation software, has added to its lineup of features with a new version of the guided wave inspection module released in May 2014.

201411 08The new module can process complex geometries like heterogeneous junctions between two waveguides (a pipework weld, for example) and section guides (like railway rails). The models used are based on advanced finite element coupling. The new version can be used in industries like oil and gas, nuclear, metalwork, rail, and aerospace.

Guided wave inspection can be used over long distances or in locations that are difficult to access. The technique is particularly well-suited to inspecting pipework, cables, rails, tanks, and large plates.

Version 1 of the Civa guided wave inspection module, which was released in 2012, featured three sub-modules for calculating propagation modes, calculating fields to assess wave propagation in a guide, and calculating interaction to simulate a test with and without a defect and calculate the signal received. The new version will ensure that the software continues to meet the demands of the industries addressed.

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April 7, 2014 | Frama-C gets high marks for cyber trust in the United States

Standards and Technology, CEA LIST’s Frama-C C-language program analysis software is today the only software in the world capable of finding all weaknesses in the most dangerous classes of weaknesses identified for sensitive software.

201411 10The results were obtained in a far-reaching NIST evaluation of static analysis tools shortly after the discovery of the Heartbleed bug, a severe vulnerability in OpenSSL, that could potentially affect 70% of the global internet. A US-based expert deemed that Coverity, the most commonly-used verification tool, could not detect Heartbleed, but that Frama-C’s formal code-analysis method would be effective at spotting the bug.

TrustInSoft, the CEA LIST spinoff created to commercialize Frama-C, will benefit directly from this situation. The company has developed a certification kit for the PolarSSL communications application, which offers a totally secure alternative to OpenSSL.

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