Internet Shutdowns

What shutdowns , why and when ?

The Human Resource Implications of Plant Shutdowns

ment Transition Program. She received her Ph. D. in economic history from the University of Michigan. Her recent research addresses early retirement, plant shutdowns, and permanent job loss. Her publications include Plant Closings and Economic Dislocation (1981), with Paul Jarley and Louis A. Ferman, and, for the U. S. Congress’s Joint Economic Committee, Economic Change, Physical Illness, Ment...

Parallel Machines Scheduling with Machine Shutdowns

we study the nonpreemptive parallel machines scheduling problem where some of the machines are planned to be shutdown. We apply LPT algorithm to the problem and analyze its performance. Our analysis shows that the makespan of the LPT schedule is bounded by twice the optimum makespan if no more than half of the machines are allowed to be shutdown simultaneously. We also show that this bound ls t...

Synthesis of schedulers for planned shutdowns of power plants

We describe the synthesis of eecient schedulers for planned shutdowns of power plants for refueling and maintenance (outages), using an automated programming tool, KIDS. Currently, the utility industry has no automated tools to generate schedules that are both safe and resource-eecient. We focused on safety constraints since they are critical in this application. There are several aspects of th...

Scheduling unit time arc shutdowns to maximize network flow over time: Complexity results

We study the problem of scheduling maintenance on arcs of a capacitated network so as to maximize the total flow from a source node to a sink node over a set of time periods. Maintenance on an arc shuts down the arc for the duration of the period in which its maintenance is scheduled, making its capacity zero for that period. A set of arcs is designated to have maintenance during the planning p...