In parallel computing, a barrier is a type of synchronization method. A barrier for a group of threads or processes in the source code means any thread/process must stop at this point and cannot proceed until all other threads/processes reach this barrier. Many collective routines and directive-based parallel languages impose implicit barriers. For example, a parallel do loop in Fortran with OpenMP will not be allowed to continue on any thread until the last iteration is completed. This is in case the program relies on the result of the loop immediately after its completion. In message passing, any global communication (such as reduction or scatter) may imply a barrier. In concurrent computing, a barrier may be in a raised or lowered state. The term latch is sometimes used to refer to a barrier that starts in the raised state and cannot be re-raised once it is in the lowered state. The term count-down latch is sometimes used to refer to a latch that is automatically lowered once a pre-determined number of threads/processes have arrived. (Wikipedia).
Computer Literacy - (unit 4) - the internet - 1 of 4
Forth unit of a series for newbie computer users. See http://proglit.com/computer-skills/ for additional information and material.
From playlist Computer Literacy - (unit 4) - the internet
Computer Literacy - (unit 4) - the internet - 2 of 4
Forth unit of a series for newbie computer users. See http://proglit.com/computer-skills/ for additional information and material.
From playlist Computer Literacy - (unit 4) - the internet
Computer Literacy - (unit 3) - hardware - 1 of 3
Third unit of a series for newbie computer users. See http://proglit.com/computer-skills/ for additional information and material.
From playlist Computer Literacy - (unit 3) - hardware
Quantum Supremacy: What is it and what does it mean?
Support me on Patreon: https://www.patreon.com/Sabine Google is working on its first demonstration of quantum supremacy, in which a quantum computer outperforms a conventional computer. In this video I explain what quantum computers are good for, what quantum supremacy is and what it will
From playlist Physics
Describing the common laws of limits. Knowing these will greatly simplify your calculations of limits.
From playlist Life Science Math: Limits in calculus
A tongue-in-cheek look at the use of limits in the life sciences.
From playlist Life Science Math: Limits in calculus
The Quantum Barrier Potential Part 1: Quantum Tunneling
Now that we've covered the particle in a box, we are familiar with the concept of a quantum problem. Let's move on to our second quantum problem, that of the quantum barrier potential. With this one, we don't have an infinite square well containing a particle, we have a free particle that
From playlist Modern Physics
Computer Basics: What Is a Computer?
Computers are all around us, and they play an important role in our lives. But what exactly is a computer? We're going to answer that question and give you an overview of some of the different types of computers you might use. 0:00 Intro 0:22 Ones and zeros 0:39 Hardware and software 1:0
From playlist Starting out with Technology
Turing Machines and The Halting Problem (Part 2)
The Halting Problem has fascinated thousands of computer scientists from around the world. A major part of Computing Logic, the proof of the halting problem proves that computers can't do everything. Check out the video to learn more about why computers work the way they do! For Turing Ma
From playlist Math
Pamela Fox: "Lowering the Barrier to Programming" - Velocity Europe 2014
A keynote address from Velocity Europe 2014 in Barcelona. Watch more from Velocity Europe 2014: http://goo.gl/Hl7fvj Visit the Velocity website to learn more: http://velocityconf.com/velocityeu2014/ Subscribe for more from the conference! http://goo.gl/szEauh I’ll show how we try to make
From playlist Velocity Europe 2014
Pamela Fox: "Lowering the Barrier to Programming" Keynote - Velocity Santa Clara 2014
Pamela Fox's keynote from the 2014 O'Reilly Velocity conference in Santa Clara, CA. "I'll show how we try to make programming newbie-friendly online and what I've learned about making newbie-friendly programming workshops." About Pamela Fox (Khan Academy): Pamela Fox loves to learn, teac
From playlist Velocity Conference 2014 (Santa Clara, CA)
Ivan Oleynik - Materials at Extremes: Discovery Science with Exascale Computers and Experiment
Recorded 31 March 2023. Ivan Oleynik of the University of South Florida presents "Materials at Extremes: Discovery Science with Exascale Computers and Experiment" at IPAM's Increasing the Length, Time, and Accuracy of Materials Modeling Using Exascale Computing workshop. Abstract: The beha
From playlist 2023 Increasing the Length, Time, and Accuracy of Materials Modeling Using Exascale Computing
Science & Technology Q&A for Kids (and others) [Part 17]
Stephen Wolfram hosts a live and unscripted Ask Me Anything about science and technology for all ages. Find the playlist of Q&A's here: https://wolfr.am/youtube-sw-qa Originally livestreamed at: https://twitch.tv/stephen_wolfram Outline of Question & Answer 0:00 Stream starting 1:12 Step
From playlist Stephen Wolfram Ask Me Anything About Science & Technology
Dr. Thomas Sterling - 2009 Inaugural Peebles Memorial Lecture Series
The 2009 Inaugural Peebles Memorial Lecture, "HPC in Phase Change: Towards a New Parallel Execution Model" presented by Dr. Thomas Sterling, renowned professor of computer science at Louisiana State University. Thomas Sterling is best known as the father of the Beowulf cluster and for hi
From playlist Peebles Memorial Lectures in Information Technology
Herbert Edelsbrunner interviewed by Dmitriy Morozov (September 30, 2020)
Herbert Edelsbrunner interviewed by Dmitriy Morozov (September 30, 2020) For more on the interview series, along with the advertisement posters, please see https://sites.google.com/view/aatrn/interviews
From playlist AATRN Interviews
ElixirConf 2016 - Edgelixir: Distributed Graph Processing in Elixir by Nathan Lapierre
Edgelixir: Distributed Graph Processing in Elixir by Nathan Lapierre Distributed graph processing systems are an important part of the modern data toolkit. Graph structures are a great way to solve a lot of problems, and distributed systems let us scale our problem size. This talk walks th
From playlist ElixirConf 2016
Collaborative Healthcare NLP: Customisable NLP platforms for health and related research
For many years, the NLP healthcare application development has been driven by NLP engineers. The engineers-centred healthcare NLP unintentionally creates barriers among healthcare workers and slows the deployment of NLP in health and related research. These barriers include 1) barrier to a
From playlist Healthcare NLP Summit 2022
Limit Theorems in Pseudorandomness - Raghu Meka
Raghu Meka The University of Texas at Austin; Member, School of Mathematics October 3, 2011 For more videos, visit http://video.ias.edu
From playlist Mathematics
Barriers for rank methods in arithmetic complexity - Rafael Oliveira
Computer Science/Discrete Mathematics Seminar I Topic:Barriers for rank methods in arithmetic complexity Speaker: Rafael Oliveira Affiliation: University of Toronto Date: October 9, 2017 For more videos, please visit http://video.ias.edu
From playlist Mathematics