Abstract: We study the optimal age policy with imperfect preventive maintenance. The preventive maintenance is imperfect in the sense that it can cause failure of a non-failed system.

A comprehensive guide on spraying POR-15, demonstrating proper techniques and safety tips for applying this powerful rust-preventative coating to ensure long-lasting protection. Maddow Blog ...

Commuters found themselves stranded at train stations across the Bay Area during the peak hours of Friday’s morning commute after a computer issue ... region’s train system for more than ...

The Doppler weather radar will be temporarily offline for a few days this month so maintenance can be done which is “crucial for enhancing the radar system’s resilience and ensuring its ...