This paper presents a new version of critical (feared) scenarios derivation tool ESA PetriNet (extraction scenarios algorithm from Petri net) available from: http://www.laas.fr/ESA. ESA PetriNet allows to derive scenarios leading to critical (feared) situation. In the past version of the tool hybrid aspect (both discrete and continuous dynamic) of system is tacked into account by temporal abstraction. In the version presented in this paper, the system model is given by a hybrid Petri net (differential predicate-transition Petri net) and the hybrid model is directly considered (without temporal abstraction). The algorithm implemented deals with both continuous and discrete dynamics. Furthermore, generated scenarios are minimal (only necessary events). Only necessary information is provided to designer.
Qualitative comparative analysis for WASH research and practice
Qualitative comparative analysis is an established research method that has been underutilized in water, sanitation, and hygiene (WASH) research. It has immense potential for addressing the complexity inherent to WASH projects, and can produce robust and transparent results from intermediate or large numbers of cases. The method enables researchers and practitioners to blend quantitative and qualitative metrics to build more nuanced contextual knowledge, and is able to detect combinations of causal conditions...
Safety Leadership Spotlight | Using Leading Indicators to Drive Organizational Safety Performance
On January 18th, I sat down with EHSQ Community member, and Principal, Larry Coco, of ESH & Quality Consulting, to hear his thoughts on how leading indicators are transforming workplace safety in business. Over the last 30 years, Larry has managed ESHQ teams in the commercial nuclear industry with Westinghouse and on operations contractor teams at Department of Energy weapons production facilities and on nuclear/chemical waste clean-up sites. Site sizes varied from a few acres and plants with hundreds of...
Learnings from Safety Professionals: Issues involved in the gathering of leading indicators
In December, 2016, our EHSQ Community had several Leading Indicator Mastermind sessions with Dr Vince Marchesani and Tamara Parris to discuss the use of leading indicators in our community members industrial workplaces. During our sessions we learned of the 56 participants, currently 34 members are collecting leading indicators as part of their safety data gathering efforts. Interestingly most people, 26 members, are using manual methods to collect their data. When asked, who do you share the data with the...
Automating oil particle analysis
Run up to 25 samples at one time The major issue for premature failure in wind turbine gearboxes is bearing failure, which leads to gearbox failure. A wind turbine gearbox will not survive if the oil is not clean and especially if the hard ferrous particles are not removed from around the bearingsThe LaserNet 230 particle counter and ferrous debris monitor has been shown to be an excellent analytical tool for end users to be able to diagnose wear faults in various machine applications such as gear boxes, engines...
Total solution: Gas and particulate analysis in Cement industry
Cement plants are increasingly required to install continuous emission monitoring systems (CEMS). While these represent a significant financial outlay, a range of other factors also need to be considered when selecting a suitable CEMS. To the inexperienced, selecting a suitable CEM can mistakenly be considered as simply ensuring that the applicable national regulations (eg MACT in the USA, Industrial Emissions Directive in Europe) are adhered to, with the necessary international quality assurances for the...