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This paper discusses SEE effects in an architecture based on commercial-off-the-shelf multicore processors for consolidating mixed criticalities applications in single board computers for space applications. This paper builds on previously proposed system-level architectures for mixed-criticality applications, describing them both for convenience together with the previous validation results. The...
There are a variety of ways to ensure the security of data in the cloud depending on the set of anticipated concerns. Many cloud storage secure data either by encrypting data on transfer, or by encrypting data at rest. These security protections seem very different, and currently there are no common goalbased security components for comparing them. In this paper we investigate the security components...
Due to the rapid urbanization, rising travel needs and accessibility, Metro Rail becomes one of the preferred modes of transport for commuters. A safe and reliable Metro System with specified reliability, availability, maintainability and safety (RAMS) requirements are of prime concern. RAMS requirements can be clubbed together to derive service punctuality which can be seen as the core KPI (Key Performance...
This paper demonstrates a mathematical model based on Markov Modeling of a complex multi-state repairable bubble gum production system with an attempt to improve its availability. The preemptive resume priority repair discipline is followed to carry out repairs of sub-units of the system. The failure rates of all the different subcomponents of the system are taken as constant whereas their repair...
Safety instrumented functions (SIFs) of process technology engineering (PCE) in the process industry are subject to regulations stated by international standards such as IEC 61508 and 61511. To be compliant with these standards a safety integrity level (SIL) assessment has to be carried out. The main goals are numerical measures for the amount of reliability that the SIF offers. One of these is the...
PMF series (a contiguous family of probability mass functions) is a new method for probabilistic assessment of availability and reliability of both repairable and non- repairable systems. The same general methodology is applied to both availability and reliability. This allows availability assessment of complex systems with both repairable and non- repairable subsystems. Binominal and Weibull can...
We present a practical, systematical method for the evaluation of the soft error rate (SER) of microelectronic devices. Existing methodologies, practices and tools are integrated in a common approach while highlighting the need for specific data or tools. The showcased method is particularly adapted for evaluating the SER of very complex microelectronic devices by engineers confronted to increasingly...
In this paper a BISR architecture for embedded memories is presented. The proposed scheme utilises a multiple bank cache-like memory for repairs. Statistical analysis is used for minimisation of the total resources required to achieve a very high fault coverage. Simulation results show that the proposed BISR scheme is characterised by high efficiency and low area overhead, even for high defect densities...
In 2006 when the European Unionpsilas RoHS Regulation went into effect, a number of global firms who produce high-reliability products such as servers and telecommunication equipment had decided to take the exemption allowed for Pb containing solders in these applications. As a result they had not completed the tests necessary to prove the reliability of Tin Silver Copper (SAC) alloys in these applications...
This paper describes a methodology for building a reliable internet core router that considers the vulnerability of its electronic components to single event upset (SEU). It begins with a set of meaningful system level metrics that can be related to product reliability requirements. A specification is then defined that can be effectively used during the system architecture, silicon and software design...
This is an introduction to the proceedings of the MWS 2007 workshop held at EDOC 2007. It first explains the motivation for and background of the workshop. Then, it contains a short description of the keynote, each long and short peer-reviewed paper, and the discussion session "impact of various execution environments on middleware for web services". After the closing statements, MWS 2007...
Especially in the classical chemical industry are typically "unique". Compared with more reproducible processes there is little experience or models about the real behavior. These industries especially those who run continuous productions involving potentially hazardous materials and process conditions are faced with a historical dilemma: availability of the production and plant safety without...
The paper presents the history of Variable Speed Drives ( VSDs ) for high power compressors of steam crackers (20 to 40 MW) in operation for the last twenty years in a branch of major French company. The paper addresses issues such as experiences, performances and availability, maintenance and upgrades, debottlenecking, modernization. The paper covers the solutions implemented in terms of technology,...
Most electric motor failures in the petroleum and chemical industries are due to bearing problems. Considering the high cost of downtime in these continuous process plants, the need to increase motor reliability is pressing. The various factors affecting bearing life and the forces at work on them are discussed. Sample calculations to predict bearing life are given. Classes of bearings and factors...
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