Amtrak back on track after server breakdown forces dozens of cancellations
Amtrak trains across the US are back on schedule after a server breakdown forced the rail service to cancel dozens of routes across the American Midwest and parts of California.over the weekend, Amtrak attributed the sudden spike in cancellations to"intermittent communications issues" with a rail-industry control system.
"Amtrak is among most railroads, including five largest freight carriers, terminal railroads, commuters/regionals and some short-lines who are clients of a system operated by Wabtec Corporation," the transport biz told. System design and architecture questions are best answere by them." We'll update if we hear back from Wabtec.is what allows Amtrak's passenger lines to safely use railroads built for and operated by freight rail lines.
A rough count of cancellations posted to Amtrak's alert account on Twitter indicates that more than 70 routes were either canceled or delayed as a result of the system's breakdown. "We worked around-the-clock with our partners to continue troubleshooting and addressing these issues, which were resolved early Sunday," an Amtrak spokesperson told us. Customers whose routes were canceled have had their fees waived.
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Frontiers | Living in a box: Understanding acoustic parameters in the NICU environmentBackground In the last years, a significant body of scientific literature was dedicated to the noisy environment preterm-born infants experience during their admission to Neonatal Intensive Care Units (NICUs). Nonetheless, specific data on sound characteristics within and outside the incubator are missing. Therefore, this study aimed to shed light on noise level and sound characteristics within the incubator, considering the following domain: environmental noise, incubator handling, and respiratory support. Methods The study was performed at the Pediatric Simulation Center at the Medical University of Vienna. Evaluation of noise levels inside and outside the incubator was performed using current signal analysis libraries and toolboxes, and differences between dBA and dBSPL values for the same acoustic noises were investigated. Noise level results were furthermore classed within previously reported sound levels derived from a literature survey. In addition, sound characteristics were evaluated by means of more than 70 temporal, spectral, and modulatory timbre features. Results Our results show high noise levels related to various real-life situations within the NICU environment. Differences have been observed between A weighted (dBA) and unweighted (dBSPL) values for the same acoustic stimulus. Sonically, the incubator showed a dampening effect on sounds (less high frequency components, less brightness/sharpness, less roughness, and noisiness). However, a strong tonal booming component was noticeable, caused by the resonance inside the incubator cavity. Measurements and a numerical model identified a resonance of the incubator at 97 Hz and a reinforcement of the sound components in this range of up to 28 dB. Conclusion Sound characteristics, the strong low-frequency incubator resonance, and levels in dBSPL should be at the forefront of both the development and promotion of incubators when helping to preserve the hearing of premature infants.
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