An instance of the pinwheel scheduling problem: tasks A, B, and C have maximum repeat times 2, 4, and 5 respectively. The repeating schedule ABACABAC... solves this instance.A pinwheel in a Lorenz SZ42 cipher machine with its pins (the small lugs near the center of the image) set to different positions
In mathematics and computer science, the pinwheel scheduling problem is a problem in real-time scheduling with repeating tasks of unit length and hard constraints on the time between repetitions.
When a pinwheel scheduling problem has a solution, it has one in which the schedule repeats periodically. This repeating pattern resembles the repeating pattern of set and unset pins on the gears of a pinwheel cipher machine, justifying the name.[1] If the fraction of time that is required by each task totals less than 3/4 of the total time, a solution always exists, but some pinwheel scheduling problems whose tasks use a total of slightly more than 5/6 of the total time do not have solutions.
Certain formulations of the pinwheel scheduling problem are NP-hard.
^Cite error: The named reference hmrtv was invoked but never defined (see the help page).
and 19 Related for: Pinwheel scheduling information
In mathematics and computer science, the pinwheelscheduling problem is a problem in real-time scheduling with repeating tasks of unit length and hard...
also known as pinwheel flower Pinwheelscheduling, problem of devising a rotating sequence of tasks with given frequencies Pinwheel tilings, aperiodic...
for more general bin packing methods. Another involves a form of pinwheelscheduling, in which a collection of messages of equal length must each be repeatedly...
Nickelodeon, launched to a new nationwide audience on April 1, 1979, with Pinwheel as its inaugural program. The network was initially commercial-free and...
network named Nickelodeon. The first program broadcast on Nickelodeon was Pinwheel, a preschool series created by Dr. Vivian Horner, who also conceived the...
M101 or M-101 most often refers to: Messier 101, or the Pinwheel Galaxy, a spiral galaxy M101 howitzer, a 105 mm light howitzer M101 or M-101 may also...
The Electric Company. She created the first Nickelodeon series, Pinwheel. The Pinwheel show premiered on December 1, 1977, as part of QUBE, an early local...
Reynolds in the comedy film What a Girl Wants (2003), and voiced Piper Pinwheeler in the animated film Robots (2005). As an adult, she starred as Viola...
children's channel on QUBE. She created the first program on Nickelodeon, Pinwheel, and conceived the idea for the Nickelodeon channel itself. As the role...
by $2.0 to $5.1 billion (11 May), mailed HPV self-collection kits with scheduling assistance can lead to greater uptake of cervical cancer screening (11...
Semifinals. In May 2017, the team revealed their new logo, an update of the pinwheel design with a new wordmark. According to Chris McGowan, president and CEO...
Bosnia". The cartoon was also shown in the United States in the 1980s on Pinwheel as well as on ABC in Australia and on CCTV in China.[citation needed] The...
disruption of the central mass. This problem auditorium reconciled by using a pinwheel effect so that in the finally executed design, the two halves meet at a...
"secret". Among the structures photographed prior to the opening were a large pinwheel by Banksy, Horse Scaffolding Sculpture by Ben Long, and a twisted truck...
typically encoded in the Baudot code or something similar. The T52 had ten pinwheels, which were stepped in a complex nonlinear[disambiguation needed] way...
Pavilion's form is based on a pinwheel plan spreading the building's program away from its center while truly mimicking a pinwheel with equally sweeping curvilinear...
Global Information
