With the popularization of multi-variety and small-batch production patterns, flexible job shop scheduling problem (FJSSP) has been widely studied. The sharing processing resources by multiple machines frequently occurs due to space constraints in a shop, which results resource preemption for workpieces. Resource complicates problems that are otherwise difficult solve. In this paper, under proc...

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In the United States, state and local public health policies play a fundamental role in innovation and progress. Preemption, by which Congress or the state legislatures limit the authority of lower jurisdictions, can eliminate the benefits of state and local policy initiatives. Preemption can also have a negative impact on enforcement, civic engagement, and grassroots movement building.In June ...

A Traffic Signal Preemption system is an automated system that allows normal operation of traffic lights at automated signalized intersections to be preempted. Preemption of signals is generally done to assist emergency vehicles, such as ambulances, so that response times are reduced and right-of-way is provided in a smooth and controlled manner. This paper proposes an innovative and cost-effec...

In July 2009, the Obama Administration proposed legislation that would create a Consumer Financial Protection Agency (“CFPA”). Among other items, the proposed legislation would eliminate federal preemption of state consumer protection laws, which would encourage states to reintroduce a scattering of local rules and regulations. Federal rules promulgated by the newly created Consumer Financial P...

In order to solve the problem of inopportune preemption in multiprogrammed multiprocessor synchronization, two strategies which are applicable to real-time systems have been investigated: preemption-safe locking and wait-free synchronization. Either of them, however, has a problem for use in the implementation of a real-time kernel. Preemption-safe locking has the drawback that the preemption o...

Traditional worst-case execution time (WCET) analysis must make very pessimistic assumptions regarding the cost of preemptions for a real-time job. For every potential preemption point, the analysis must add to the WCET of a job the cache-related preemption delay (CRPD) incurred due to the contention for memory resources with other jobs in the system. However, recent work has shown that CRPD ca...

extensive research has been devoted to resource constrained project scheduling problem. however, little attention has been paid to problems where a certain time penalty must be incurred if activity preemption is allowed. in this paper, we consider the project scheduling problem of minimizing the total cost subject to resource constraints, earliness-tardiness penalties and preemption penalties, ...