In Computer science, a funnel is a synchronization primitive used in kernel development to protect system resources. First used on Digital UNIX as a way to "funnel" device driver execution onto a single processor, funnels are now used in the Mac OS X kernel to serialize access to the BSD portion of XNU. A funnel is a mutual exclusion (mutex) mechanism that prevents more than one thread from accessing certain kernel resources at the same time. Each thread acquires a funnel when it enters a synchronized portion of the kernel, and releases it when it leaves. If a thread blocks (sleeps) while holding a funnel, the kernel forces the thread to automatically drop the funnel, thereby allowing other threads to enter the synchronized portion of the kernel. Because a funnel is automatically dropped when a thread blocks, care must be taken to ensure that synchronized resources are acquired again after any blocking operation. Specifically, acquiring a funnel can be a blocking operation, so if multiple funnels are needed, they must be acquired at once. This limits the utility of funnels because it increases the granularity of locking when multiple funnels need to be held at once. (Wikipedia).
Solving and Graphing an inequality when the solution point is a decimal
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis
Solving and graphing a multi-step inequality
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis
Solving and graphing an inequality
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis
Solving a multi-step inequality and then graphing
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis
Solving and graphing an inequality with infinite many solutions
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis
Data structures: Introduction to graphs
See complete series on data structures here: http://www.youtube.com/playlist?list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P In this lesson, we have described Graph data structure as a mathematical model. We have briefly described the concept of Graph and some of its applications. For practice
From playlist Data structures
Ruby Midwest 2013 Computer, Program Theyself! by Zee Spencer
Robots. Unthinking. Unfeeling. Cold. Incapable of surprising us. Or are they? In this demonstration I'll be walking through how I use ruby to teach computers to surprise me with answers to problems I don't know how to solve. It draws heavily on testing to model behavior, stats, and rubies
From playlist Ruby Midwest 2013
Graphing an inequality with variables and parenthesis on both sides
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis
Ruby Conf 2011 Threading versus Evented by Dr Nic Williams
I wanted to know, "Do I need to learn about EventMachine or node.js? Can I use threads? What is so good or bad about threading in Ruby 1.8, Ruby 1.9, JRuby and Rubinius 2.0?" What was important to me was the the choice was abstracted away. I wanted to write normal, step-by-step Ruby code.
From playlist Ruby Conference 2011
Lecture 17 | Programming Paradigms (Stanford)
Lecture by Professor Jerry Cain for Programming Paradigms (CS107) in the Stanford University Computer Science department. In this lecture, Prof. Cain continues discussing semaphores, and moves on to more practical applications of threading in relation to C and C++ programming. Programm
From playlist Lecture Collection | Programming Paradigms
DjangoCon 2019 - Keynote: The Natural State of Computers by Amber Brown
DjangoCon 2019 - Keynote: The Natural State of Computers by Amber Brown TBD This talk was presented at: https://2019.djangocon.us/talk/keynote-amber-brown/ LINKS: Follow Amber Brown π On Twitter: https://twitter.com/hawkieowl Follow DjangCon US π https://twitter.com/djangocon Follow
From playlist DjangoCon US 2019
The Anti-Ergonomy of Instruments of Interaction
(January 29, 2010) Adrian Freed, from UC Berkeley Center for New Music and Audio Techniques, discusses music, technology and computing and his research on intriguing new interactions within these systems. Stanford University: http://www.stanford.edu/ Stanford Engineering Everywhere: http
From playlist Lecture Collection | Human-Computer Interaction Seminar (2009-2010)
Apollo 14 Mission To Fra Mauro (1971)
Courtesy: NASA/JSC Click to subscribe! http://bit.ly/subAIRBOYD #AIRBOYD #AvGeek
From playlist Earth Rock on the Moon
Determining the solution point of a system of equations by graphing
πTo solve a system of equations means to obtain a common x-value and a common y-value that makes the each of the equation in the system true. To solve a system of equations by graphing means to obtain the point of intersection (if any) of the graphs of each of the equation that make up th
From playlist Solve a System of Equations by Graphing
Threads/Multiple cores: Parallelism in C++ #2/3 (also hyperthreading)
Computer programs can be made faster by making them do many things simultaneously. Letβs study three categorical ways to accomplish that in GCC. In the second episode, we explore various alternative approaches to threads. The first episode can be found at: https://www.youtube.com/watch?v=
From playlist Programming
Solving a multi step inequality
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis
RailsConf 2015 - Processes and Threads - Resque vs. Sidekiq
By, James Dabbs Background job processing is an important component of most large Rails applications. Two of the most common solutions - Resque and Sidekiq - are largely differentiated by one underlying architectural decision: processes or threads? Is this talk, we'll provide a gentle int
From playlist RailsConf 2015
Parallelism in C++ :: Part 2/3: Threads [redacted]
REPLACED BY: https://www.youtube.com/watch?v=MfEkOcMILDo Computer programs can be made faster by making them do many things simultaneously. Letβs study three categorical ways to accomplish that in GCC. In the second episode, we explore various alternative approaches to threads. As a plot
From playlist Recommended picks
MIT 16.412J Cognitive Robotics, Spring 2016 View the complete course: https://ocw.mit.edu/16-412JS16 Instructor: MIT students This is the sixth advanced lecture in the MIT 16.412 Cognitive Robotics of Spring 2016, led by MIT students. Students presented the research in reachability and it
From playlist MIT 16.412J Cognitive Robotics, Spring 2016
Solving and graphing an inequality by multiplying by a fraction on one side ex 12
π Learn how to solve multi-step linear inequalities having parenthesis. An inequality is a statement in which one value is not equal to the other value. An inequality is linear when the highest exponent in its variable(s) is 1. (i.e. there is no exponent in its variable(s)). A multi-step l
From playlist Solve and Graph Inequalities | Multi-Step With Parenthesis