Computer

Negative Binary Numbers – you may have heard of ‘signed’ numbers, but do you know how they work? Professor Brailsford explains not just how, but why we use the systems we do. Binary Addition: http://youtu.be/WN8i5cwjkSE Most Difficult Program to Compute?: http://youtu.be/i7sm9dzFtEI Floating Point Numbers: http://youtu.be/PZRI1IfStY0 http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited
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Deleting files may not mean they’re gone. Even overwriting them isn’t safe. Professor Derek McAuley explains. EXTRA BITS – more on Flash/SSD: http://youtu.be/HQWFCDN9VZI Punch Card Programming: http://youtu.be/KG2M4ttzBnY http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Thanks to Richard Faulkner for the photo
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Machine Learning where you put in a fraction of the effort? What’s not to like? – Dr Michel Valstar explains Active & Cooperative Learning. https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran’s Numberphile. More
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Email is part of the daily routine for many people, but how does a computer deal with email messages? Professor Tom Rodden explains how email is processed so quickly. http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project
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The back door that may not be a back door… The suspicion about Dual_EC_DRBG – The Dual Elliptic Curve Deterministic Random Bit Generator – with Dr Mike Pound. EXTRA BITS: https://youtu.be/XEmoD06_mZ0 Nothing up my sleeve Numbers: https://youtu.be/oJWwaQm-Exs Elliptic Curves: https://youtu.be/NF1pwjL9-DE https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science
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Hear Brian Kernighan on how he got into programming, the successors of C and the biggest challenges… Watch Part 2 before it’s live!: https://youtu.be/VVpRj3Po6K4 https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran’s Numberphile. More
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ISPs don’t always get it right – they gamble that all of their subscribers won’t use all of their bandwidth all of the time. Dr Richard Mortier explains Statistical Multiplexing. Routing & YouTube Offline: http://youtu.be/AkxqkoxErRk Network Stacks & The Internet: http://youtu.be/PG9oKZdFb7w Punch Card Programming: http://youtu.be/KG2M4ttzBnY Undecidability Series: http://www.youtube.com/playlist?list=PLzH6n4zXuckpIQPv8hiHpJkSyv0fmXEYr http://www.facebook.com/computerphile Tweets by computer_phile This video was
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Why can’t we just disconnect a malevolent AI? Rob Miles on some of the simplistic solutions to AI safety. Out of focus shots caused by faulty camera and “slow to realise” operator – it has been sent for repair – the camera, not the operator…. (Sean, June 2017) More from Rob Miles on his channel:
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When a Bitcoin Miner Mines, what is happening? Dr Mike Pound exposes the process.. note: at 3:39 Mike mentions a Bitcoin is mined every ten minutes when it is actually a block that is mined every ten minutes, at time of recording a successful block generates 12.5 new Bitcoins. Password Cracking: https://youtu.be/7U-RbOKanYs Onion Routing (TOR):
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Byte ordering, or boiled egg orientation, endianness is important! Dr Steve Bagley on the computer science topic named after something from an 18th century novel…. The copy of Gulliver’s Travels used in the graphics was found at archive.org and can be viewed here: http://bit.ly/C_Gulliver The animations of the hex to binary have a classic ‘out
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Password1 is a terrible password, but how can I remember different secure passwords for each login? Use a password manager. Dr Mike Pound explains how they work. How to Choose a Password: https://www.youtube.com/watch?v=3NjQ9b3pgIg Password Cracking on a 4x Titan X Beast: https://youtu.be/7U-RbOKanYs Securing Stream Ciphers (HMAC): https://www.youtube.com/watch?v=wlSG3pEiQdc https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed
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How can a file take up no space on disk? Dr Steve Bagley explains how ‘0’ size files can exist. Magnetic Media (Floppies & Tapes) https://youtu.be/cWKo_dMUw7M Password Cracking: https://youtu.be/7U-RbOKanYs Google Deep Dream: https://youtu.be/BsSmBPmPeYQ Air Traffic Control: https://youtu.be/QK4wwxTRoAY EXTRA BITS: https://youtu.be/oC7UwnZlYR8 http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science
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Just who chose Computer Science before it existed as an academic subject? Emeritus Professor David Brailsford talks about how he started as a computer scientist. To be continued in further videos…. http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a
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Years of work down the drain, the convolutional neural network is a step change in image classification accuracy. Image Analyst Dr Mike Pound explains what it does. Kernel Convolutions: https://youtu.be/C_zFhWdM4ic Deep Learning: https://youtu.be/l42lr8AlrHk Botnets: https://youtu.be/UVFmC178_Vs AI’s Game Playing Challenge: https://youtu.be/5oXyibEgJr0 Space Carving: https://youtu.be/cGs90KF4oTc http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean
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Whether you are a Mac-o-phile or a Mac-o-phobe it is hard to deny the impact of the original Mac. As Mac turns 30, Professor David Brailsford takes us through what the original Mac was like and how it helped people learn to love computers. EXTRA BITS: http://youtu.be/rbeYwh2CstQ How YouTube Works: http://www.youtube.com/watch?v=OqQk7kLuaK4 Note: please excuse the
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Abstraction is at the heart of everything to do with computing. James Clewett takes us through the layers abstracting the pixels forming this text on screen from the electrons in the computer. http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computerphile is a sister project to Brady Haran’s Numberphile. See
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How do image processing apps and realtime applications apply effects so quickly? Dr Mike Pound decides to blur his Christmas Tree… Mike’s code: http://GitHub.com/mikepound/convolve EXTRA BITS: https://youtu.be/MHIS59Se66k https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady
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Where are we at with Quantum computing? Robert Smith (of Rigetti Computing) explains that we’re in the EDSAC/ENIAC era…. see follow up video for more technical information: Watch the next one in the series: https://youtu.be/ZN0lhYU1f5Q https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham:
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SGML ‘theologians’ were at war with Internet browser ‘pragmatists’ after Sir Tim Berners-Lee released HTML on the world. Professor Brailsford watched it happen Part one of this series: https://youtu.be/RH0o-QjnwDg The Professor’s Notes: http://www.eprg.org/computerphile/newsgml.pdf http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile
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Connecting via SSH to a remote machine is second nature to some, but how does it work? Dr Steve Bagley. Dr Mike Pound on Hashing (mentions padding but full video on padding is planned to follow): https://youtu.be/DMtFhACPnTY https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University
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Diffie Hellman has a flaw. Dr Mike Pound explains how a man in the middle could be a big problem, unless we factor it in… Public Key Cryptography: https://youtu.be/GSIDS_lvRv4 Elliptic Curve Cryptography: Coming Soon! https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer
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For the past year, we’ve been asking this as a sound-check question. Here are the results! Professor Graham Hutton (Haskell) Joseph Best (BBC Basic) David CX (Java / Python) Lorraine Underwood (PHP) Rob Miles (Python) Charles Arthur (Python) Sarah Spencer (Javascript) Matt Denton (C) Matt Lloyd (C/Python/PHP) Ian Dickinson (C) Tom Sheridan (Python) Spencer Owen
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Main video is at: http://youtu.be/LHSSY8QNvew This is extra footage from Tom Rodden on tracking cookies and some of the controversy surrounding digital data. Video filmed and edited by Sean Riley. Computerphile is a project by Brady Haran. See the full list of Brady’s video projects at: http://periodicvideos.blogspot.co.uk/2012/06/here-are-my-channels.html Computer Science at the University of Nottingham: http://bit.ly/nottscomputer
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Audible free book: http://www.audible.com/computerphile Why can’t artificial intelligence do what humans can? Rob Miles talks about generality in intelligence. Sean Comments/Questions (For those who can’t hear him clearly) 11secs: “This was the hill climbing algorithm?” 2min 40sec: “recently with Professor Brailsford we did the idea of The Turing Test, so that strikes me from what
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