9 research outputs found

    ETCS On-board Unit Safety Testing: Saboteurs, Testing Strategy and Results

    Get PDF
    It is necessary to verify the faults tolerance of the European Train Control System (ETCS) on-board unit even if these faults are uncommon. Traditional test methods defined and used in ETCS do not allow to check this, so it is necessary to develop a new mechanism of tests. This paper presents the design and implementation of a saboteur applied to the railway sector. The main purpose of the saboteur is the fault injection in the communication interfaces. By means of a virtual laboratory it is possible to simulate actual train journeys to test the ETCS on-board unit. Making use of the saboteurs and the virtual laboratory it is possible to analyse the behaviour of the train in the presence of unexpected faults, and to verify that the decisions taken are correct to ensure the required safety level. Therefore, this work shows a testing strategy based on different kinds of train journeys when faults are injected, and the analysis of the results.</p

    A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic.

    Get PDF
    The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about a situation. Participants from 87 countries and regions (n = 21,644) were randomly assigned to one of two brief reappraisal interventions (reconstrual or repurposing) or one of two control conditions (active or passive). Results revealed that both reappraisal interventions (vesus both control conditions) consistently reduced negative emotions and increased positive emotions across different measures. Reconstrual and repurposing interventions had similar effects. Importantly, planned exploratory analyses indicated that reappraisal interventions did not reduce intentions to practice preventive health behaviours. The findings demonstrate the viability of creating scalable, low-cost interventions for use around the world

    Low-fat frankfurters formulated with a healthier lipid combination as functional ingredient: Microstructure, lipid oxidation, nitrite content, microbiological changes and biogenic amine formation

    Get PDF
    Oil (healthier lipid combination of olive, linseed and fish oils)-in-water emulsions stabilized with different protein systems (prepared with sodium caseinate (SC), soy protein isolate (SPI), and microbial transglutaminase (MTG)) were used as pork backfat replacers in low-fat frankfurters. Microstructure, lipid oxidation, nitrite content, microbiological changes and biogenic amine formation of frankfurters were analyzed and found to be affected by the type of oil-in-water emulsion and by chilling storage (2 °C, 41 days). Although the lipid oxidation levels attained were low, replacement of animal fat by healthier oil combinations in frankfurter formulation did promote a slight increase in lipid oxidation. Residual nitrite was affected (P<0.05) by formulation and storage. Only 51-61% of the added nitrite was detectable in the product after processing and 17-46% at the end of storage. The microbial population was low in all formulations during chilling storage. Spermine was the most abundant amine (19-20 mg/kg), but similar in level to all samples. © 2011 Elsevier Ltd.This research was supported by projects AGL2007-61038/ALI and AGL2008-04892-CO3-01 under the Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica (I+D+I) and the Consolider-Ingenio 2010:CARNISENUSA (CSD2007-00016), Ministerio de Ciencia y Tecnología.Peer Reviewe

    Healthier lipid combination oil-in-water emulsions prepared with various protein systems: An approach for development of functional meat products

    No full text
    Five protein-stabilized oil-in-water emulsions were prepared using sodium caseinate (O/SC), soy protein isolate (O/SPI), sodium caseinate and microbial transglutaminase (O/SC + MTG), sodium caseinate, microbial transglutaminase and meat slurry (O/SC + MTG + MS) and SPI, sodium caseinate and microbial transglutaminase (O/IPS + SC + MTG); their composition (proximate analysis and fatty acid profile) and physicochemical characteristics were examined. The lipid phase was a combination of healthy fatty acids from olive, linseed and fish oils, containing low proportions (15%) of saturated fatty acids (SFA) and high proportions of monounsaturated fatty acids (MUFA, 47%) and polyunsaturated fatty acids (PUFA, 36%), with a PUFA/SFA ratio >2, and a n-6/n-3 PUFA ratio of 0.4. All the oil-inwater emulsions showed high thermal and creamy stability. Results of penetration test and dynamic rheological properties showed la existencia de different types of oil-in-water emulsion structures according to stabilizing system of emulsion. Those structures ranged from concentrate solution-like (stabilized only with SC) (gel strength 0.06 mJ) to gel-like (samples containing MTG) behaviours (gel strength ranged between 3.4 and 6.2 mJ). Morphological differences in the organization of the network structure were observed (by scanning electron microscopy) as functions of the protein system used to stabilize the oil-in-water emulsions. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.The authors gratefully acknowledge funding from projects Consolider-Ingenio 2010:CARNISENUSA (CSD2007- 00016), AGL2008-04892-CO3-01 and AGL2007-61038/ALIPeer Reviewe

    Development of an Advanced Laboratory for ETCS Applications

    Get PDF
    AbstractThe current process of putting ETCS equipment in service is affected by the testing process and laboratory procedures. This paper deals with two novel laboratory tools that the EATS project (FP7-TRANSPORT-314219) has produced in order to overcome some of the problems those processes show and advance towards the “Zero On-Site Testing” paradigm. On the one hand, saboteurs for the internal interfaces of the ETCS on-board system have been created. These saboteurs integrate seamlessly with the rest of the elements of the testing laboratory and allow to gather evidences regarding the safety functions of the equipment under test. On the other hand, the Wireless Communication Emulators have been also developed. These tools allow to put the wireless interfaces of the ETCS on-board equipment in the worst cases it will find in a real environment, by reproducing and injecting noise and interferer signals, and measuring the effect in the equipment under test

    C. Literaturwissenschaft.

    No full text
    corecore