Estimating lock congestion

Estimating Urban Road Congestion Costs

Economists wishing to analyse road congestion and road pricing have usually relied on linkbased speed-flow relationships. These may provide a poor description of urban congestion, which mainly arises from delays at intersections. Using the simulation model SATURN, we investigate the second-best proportional traffic reduction and find that linear speed-flow relations describe network flows quite...

Estimating the Actual Cost of Transmission System Congestion

Abstract In its simplest form determination of the cost of transmission system congestion is rather straightforward. Assuming complete knowledge of the power system inputs, such as the loads at all system buses, and that the generators bid in their actual costs (i.e., they are not taking advantage of localized market power), then the hourly short-term cost of transmission congestion is the diff...

Tackling Early Heart Failure Deaths and Readmissions by Estimating Congestion.

SEE PAGE 886 P atients who are discharged after a hospital admission for heart failure enter a vulnerable phase with a very high risk for early death or heart failure readmission (1). This is a major problem for patients, doctors, and society. The underlying cause for high readmission rates is still incompletely understood, although incomplete decongestion at discharge is frequently suggested t...

Lock Manager Lock Manager Data

RH Lock: A Scalable Hierarchical Spin Lock

Scalable architectures with non-uniform memory access time (NUMAs) have gained increased popularity in recent years. The increased scalability have increased the demand for scalable lock implementations, such as the queue-based locks of Mellor-Crummey and Scott (MCS lock), and of Craig, Landin and Hagersten (CLH lock). This paper demonstrates that the first-come first-served nature of queue-bas...