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Early Computing: Crash Course Computer Science #1Early Computing: Crash Course Computer Science #1
00:11:53February 22, 2017, 2:00 pm
Early Computing: Crash Course Computer Science #1

Channel: CrashCourse & Total View: 940066


Add Date: February 22, 2017, 2:00 pm & Duration: 00:11:53


Likes: 24275 | Dislike: 410


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computers, computation, computer science, electronic age, history, Mesopotamia, Astrolabe, abacus, Hollerith machine, step reckoner, tabulating machine, Charles Babbage, ada Lovelace, Katherine Johnson, international business machines, ibm, range tables, difference engine, analytical engine, census, Herman Hollerith, punch cards

Hello, world! Welcome to Crash Course Computer Science! So today, we’re going to take a look at computing’s origins, because even though our digital computers are relatively new, the need for computation is not. Since the start of civilization itself, humans have had an increasing need for special devices to help manage laborious tasks, and as the scale of society continued to grow, these computational devices began to play a crucial role in amplifying our mental abilities. From the abacus and astrolabe to the difference engine and tabulating machine, we’ve come a long way to satisfying this increasing need, and in the process completely transformed commerce, government, and daily life.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Robots: Crash Course Computer Science #37Robots: Crash Course Computer Science #37
00:12:26November 29, 2017, 3:36 pm
Robots: Crash Course Computer Science #37

Channel: CrashCourse & Total View: 71268


Add Date: November 29, 2017, 3:36 pm & Duration: 00:12:26


Likes: 2376 | Dislike: 49


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, computation, robots, robot, automaton, computer numerical control, cnc, industrial robot, unite, control loop, negative feedback loop, pid controller, proportional integrative derivative controller, autonomous cars, android, Isaac Asimov, terminator, robocop, ex machinima, data, ultron, astroboy, c-3po

Today we're going to talk about robots! Robots are often thought as a technology of the future, but they're already here by the millions in the workplace, our homes, and pretty soon on the roads. We'll discuss the origins of robotics to its proliferation, and even look at some common control designs that were implemented to make them more useful in the workplace. Robots are often thought of as a menace or danger to society, and although there definitely is the propensity for malicious uses, robots also have the potential to drastically improve the world.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Boolean Logic & Logic Gates: Crash Course Computer Science #3

Channel: CrashCourse & Total View: 563602


Add Date: March 8, 2017, 3:27 pm & Duration: 00:10:07


Likes: 13785 | Dislike: 175


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, binary, logic, logic gates, and, not, circuits, computers, computer science, computation, computing, comp sci, boolean algebra, operations, true, false, logic table

Today, Carrie Anne is going to take a look at how those transistors we talked about last episode can be used to perform complex actions. With the just two states, on and off, the flow of electricity can be used to perform a number of logical operations, which are guided by a branch of mathematics called Boolean Algebra. We’re going to focus on three fundamental operations - NOT, AND, and OR - and show how they were created in a series of really useful circuits. And its these simple electrical circuits that lay the groundwork for our much more complex machines.

*CORRECTION* AT 1:27 the graph says "Quinary System" but then the graph shows 10 possible states - which is actually decimal. Technically, there should be only 5 possible values there, but the overall concept is still the same.


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Computer Vision: Crash Course Computer Science #35Computer Vision: Crash Course Computer Science #35
00:11:10November 15, 2017, 3:11 pm
Computer Vision: Crash Course Computer Science #35

Channel: CrashCourse & Total View: 76345


Add Date: November 15, 2017, 3:11 pm & Duration: 00:11:10


Likes: 2670 | Dislike: 37


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, computation, computer vision, fei-fei li, kernel, filter, viola-jones, face detection, convolutional neural networks, convolution, image processing, facial recognition, deep learning, biometrics, autonomous cars, snapchat filters, barcodes, prewitt operators

Today we’re going to talk about how computers see. We’ve long known that our digital cameras and smartphones can take incredibly detailed images, but taking pictures is not quite the same thing. For the past half-century, computer scientists have been working to help our computing devices understand the imagery they capture, leading to advancements everywhere, from tracking hands and whole bodies, biometrics to unlock our phones, and eventually giving autonomous cars the ability to understand their surroundings.

Check out Origin of Everything here!
https://www.youtube.com/channel/UCiB8h9jD2Mlxx96ZFnGDSJw

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Hackers & Cyber Attacks: Crash Course Computer Science #32

Channel: CrashCourse & Total View: 125973


Add Date: October 18, 2017, 2:13 pm & Duration: 00:11:53


Likes: 3453 | Dislike: 79


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computers, computing, compsci, hackers, hacking, white hat, black hat, cyber attack, cybercrime, social engineering, phishing, trojan horse, malware, ransomware, exploit, bug, buffer overflow, botnet, worms, ddos, distributed denial of service, cyberwarfare

Today we're going to talk about hackers and their strategies for breaking into computer systems. Now, not all hackers are are malicious cybercriminals intent on stealing your data (these people are known as Black Hats). There are also White Hats who hunt for bugs, close security holes, and perform security evaluations for companies. And there are a lot of different motivations for hackers—sometimes just amusement or curiosity, sometimes for money, and sometimes to promote social or political goals. Regardless, we're not going to teach you how to become a hacker in this episode but we are going to walk you through some of the strategies hackers use to gain access to your devices, so you can be better prepared to keep your data safe.

*CORRECTION*
AT 7:40 "whatever" should not have a leading '
The correct username field should be:
whatever’; DROP TABLE users;


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Registers and RAM: Crash Course Computer Science #6

Channel: CrashCourse & Total View: 371283


Add Date: March 29, 2017, 3:00 pm & Duration: 00:12:17


Likes: 9512 | Dislike: 112


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, Ram, memory, registers, addresses, dram, sram, flash memory, nvram, random access memory, latches, bits, abstraction, logic, computer engineering, computers, electronics, gates, and-or latch, gated latch, write enable, read enable

Take the 2017 PBS Digital Studios Survey: http://surveymonkey.com/r/pbsds2017. Today we’re going to create memory! Using the basic logic gates we discussed in episode 3 we can build a circuit that stores a single bit of information, and then through some clever scaling (and of course many new levels of abstraction) we’ll show you how we can construct the modern random-access memory, or RAM, found in our computers today. RAM is the working memory of a computer. It holds the information that is being executed by the computer and as such is a crucial component for a computer to operate. Next week we’ll use this RAM, and the ALU we made last episode, to help us construct our CPU - the heart of a computer.

*CORRECTION*

In our 16x16 Latch Matrix graphic, we inadvertently left off the horizontal row access line above the top row of latches. As a result, the highlighted line for the row at address 12 should actually be one line higher.


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The First Programming Languages: Crash Course Computer Science #11

Channel: CrashCourse & Total View: 260285


Add Date: May 10, 2017, 2:30 pm & Duration: 00:11:52


Likes: 6423 | Dislike: 105


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer science, compsci, programming, computer programming, coding, software, machine code, assembly code, pseudo-code, assembly, punch card, grace hopper, harvard mark i, A-0, compiler, fortran, cobol, python, pascal, c++, ruby, java, swift

Get your first two months of CuriosityStream free by going to http://curiositystream.com/crashcourse and using the promo code “crashcourse”.

So we ended last episode with programming at the hardware level with things like plugboards and huge panels of switches, but what was really needed was a more versatile way to program computers - software! For much of this series we’ve been talking about machine code, or the 1’s and 0’s our computers read to perform operations, but giving our computers instructions in 1’s and 0’s is incredibly inefficient, and a “higher-level” language was needed. This led to the development of assembly code and assemblers that allow us to use operands and mnemonics to more easily write programs, but assembly language is still tied to underlying hardware. So by 1952 Navy officer Grace Hopper had helped created the first high-level programming language A-0 and compiler to translate that code to our machines. This would eventually lead to IBM’s Fortran and then a golden age of computing languages over the coming decades. Most importantly, these new languages utilized new abstractions to make programming easier and more powerful giving more and more people the ability to create new and amazing things.


Produced...

Integrated Circuits & Moore’s Law: Crash Course Computer Science #17

Channel: CrashCourse & Total View: 146596


Add Date: June 21, 2017, 2:49 pm & Duration: 00:13:50


Likes: 4099 | Dislike: 60


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, moore's law, integrated circuits, computers, computer science, compsci, comp sci, transistors, printed circuit boards, pcbs, ics, photolithography, photoresist, photomask, silicon, wafer, intel, microprocessor, vlsi, quantum tunneling

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So you may have heard of Moore's Law and while it isn't truly a law it has pretty closely estimated a trend we've seen in the advancement of computing technologies. Moore's Law states that we'll see approximately a 2x increase in transistors in the same space every two years, and while this may not be true for much longer, it has dictated the advancements we've seen since the introduction of transistors in the mid 1950s. So today we're going to talk about those improvements in hardware that made this possible - starting with the third generation of computing and integrated circuits (or ICs) and printed circuit boards (or PCBs). But as these technologies advanced a newer manufacturing process would bring us to the nanoscale manufacturing we have today - photolithography.

Check out Veritasium's video: How Does a Transistor Work?
https://www.youtube.com/watch?v=IcrBqCFLHIY

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Want to know more about Carrie Anne?
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How Computers Calculate - the ALU: Crash Course Computer Science #5

Channel: CrashCourse & Total View: 385861


Add Date: March 22, 2017, 2:16 pm & Duration: 00:11:10


Likes: 9146 | Dislike: 105


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, alu, arithmetic and logic unit, computers, computing, computer science, overflow, pacman, adder, ripple carry adder, computation, intel 74181, abstraction, binary, how computers calculate

Take the 2017 PBS Digital Studios Survey: http://surveymonkey.com/r/pbsds2017. Today we're going to talk about a fundamental part of all modern computers. The thing that basically everything else uses - the Arithmetic and Logic Unit (or the ALU). The ALU may not have to most exciting name, but it is the mathematical brain of a computer and is responsible for all the calculations your computer does! And it's actually not that complicated. So today we're going to use the binary and logic gates we learned in previous episodes to build one from scratch, and then we'll use our newly minted ALU when we construct the heart of a computer, the CPU, in episode 7.

*CORRECTION*

We got our wires crossed with the Intel 4004, which we discuss later. The 74181 was introduced by Texas Instruments in 1970 but appeared in technical manuals around 1969. The design of the 74181, like most of the 74xx/74xxx series, was an open design which was manufactured by many other companies - Fairchild was one such manufacturer. They produced a chip, the Fairchild 9341, which was pin-for-pin compatible with the 74181.

Fairchild was the first to prototype an ALU, building the Fairchild 4711 in 1968 - a one-off device not optimized for scale manufacturing. In 1969, Signetics came...

Cryptography: Crash Course Computer Science #33Cryptography: Crash Course Computer Science #33
00:12:33October 25, 2017, 3:11 pm
Cryptography: Crash Course Computer Science #33

Channel: CrashCourse & Total View: 104454


Add Date: October 25, 2017, 3:11 pm & Duration: 00:12:33


Likes: 3464 | Dislike: 61


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, cryptography, codebreaking, enigma, allan turing, encryption, decryption, cipher, des, res, key exchange, https, diffie-hellman, private key, rsa, public key

Today we’re going to talk about how to keep information secret, and this isn’t a new goal. From as early as Julius Caesar’s Caesar cipher to Mary, Queen of Scots, encrypted messages to kill Queen Elizabeth in 1587, theres has long been a need to encrypt and decrypt private correspondence. This proved especially critical during World War II as Allan Turing and his team at Bletchley Park attempted to decrypt messages from Nazi Enigma machines, and this need has only grown as more and more information sensitive tasks are completed on our computers. So today, we’re going to walk you through some common encryption techniques such as the Advanced Encryption Standard (AES), Diffie-Hellman Key Exchange, and RSA which are employed to keep your information safe, private, and secure.

Note: In October of 2017, researchers released a viable hack against WPA2, known as KRACK Attack, which uses AES to ensure secure communication between computers and network routers. The problem isn't with AES, which is provably secure, but with the communication protocol between router and computer. In order to set up secure communication, the computer and router have to agree through what's called a "handshake". If this handshake is interrupted in just the right way, an attacker can...

Alan Turing: Crash Course Computer Science #15Alan Turing: Crash Course Computer Science #15
00:13:04June 7, 2017, 2:20 pm
Alan Turing: Crash Course Computer Science #15

Channel: CrashCourse & Total View: 194473


Add Date: June 7, 2017, 2:20 pm & Duration: 00:13:04


Likes: 5136 | Dislike: 101


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer science, computations, computers, alan turing, turing, turing test, turing machine, artificial intelligence, the bombe, nazi, enigma, world war II, halting problem, Bletchley park, captcha, turing award

Today we’re going to take a step back from programming and discuss the person who formulated many of the theoretical concepts that underlie modern computation - the father of computer science himself: Alan Turing. Now normally we try to avoid “Great Man" history in Crash Course because truthfully all milestones in humanity are much more complex than just an individual or through a single lens - but for Turing we are going to make an exception. From his theoretical Turing Machine and work on the Bombe to break Nazi Enigma codes during World War II, to his contributions in the field of Artificial Intelligence (before it was even called that), Alan Turing helped inspire the first generation of computer scientists - despite a life tragically cut short.

Special thanks to Contributing Writer Robert Xiao whom we should have (and forgot) to include in the credits. His help with this episode was invaluable.

Ps. Have you had the chance to play the Grace Hopper game we made in episode 12. Check it out here! http://thoughtcafe.ca/hopper/

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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The Central Processing Unit (CPU): Crash Course Computer Science #7

Channel: CrashCourse & Total View: 332051


Add Date: April 5, 2017, 2:56 pm & Duration: 00:11:38


Likes: 7674 | Dislike: 91


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, cpu, central processing unit, clock, instructions, microarchitecture, instruction register, opcode, register, RAM, ALU, clock clock cycle, overclocking, underclocking, dynamic frequency scaling, intel 4004, processor

Take the 2017 PBS Digital Studios Survey: http://surveymonkey.com/r/pbsds2017. Today we’re going to build the ticking heart of every computer - the Central Processing Unit or CPU. The CPU’s job is to execute the programs we know and love - you know like GTA V, Slack... and Power Point. To make our CPU we’ll bring in our ALU and RAM we made in the previous two episodes and then with the help of Carrie Anne’s wonderful dictation (slowly) step through some clock cycles. WARNING: this is probably the most complicated episode in this series, we watched this a few times over ourselves, but don't worry at about .03Hz we think you can keep up.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

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The World Wide Web: Crash Course Computer Science #30

Channel: CrashCourse & Total View: 95596


Add Date: October 4, 2017, 2:43 pm & Duration: 00:11:37


Likes: 2705 | Dislike: 53


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, world wide web, web, internet, computer science, compsci, hyperlinks, webpage, html, vannevar bush, web browser, hypertext, http, 404 error, css, javascript, tim berbers-lee, url, cern, mosaic, internet explorer, mozilla, netscape, amazon, eBay, google, yahoo, web crawler, net neutrality

Today we’re going to discuss the World Wide Web - not to be confused with the Internet, which is the underlying plumbing for the web as well as other networks. The World Wide Web is built on the foundation of simply linking pages to other pages with hyperlinks, but it is this massive interconnectedness that makes it so powerful. But before the web could become a thing, Tim Berners-Lee would need to invent the web browser at CERN, and search engines would need to be created to navigate these massive directories of information. By the mid 1990’s we will see the rise of Yahoo and Google and monolithic websites like Ebay and Amazon, forming the web we know today. But before we end our unit on the Internet we want to take a moment to discuss the implications of Net Neutrality, and its potential to shape the Internet's future.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Want to know more about Carrie Anne?
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Data Structures: Crash Course Computer Science #14

Channel: CrashCourse & Total View: 209223


Add Date: May 31, 2017, 3:00 pm & Duration: 00:10:07


Likes: 4637 | Dislike: 75


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer science, computers, compsci, data structures, arrays, vectors, index, variables, strings, characters, matrix, struct, pointer, node, fifo, queue, stacks, trees, lifo, root, children node, parent node, red-black trees, heaps

Today we’re going to talk about on how we organize the data we use on our devices. You might remember last episode we walked through some sorting algorithms, but skipped over how the information actually got there in the first place! And it is this ability to store and access information in a structured and meaningful way that is crucial to programming. From strings, pointers, and nodes, to heaps, trees, and stacks get ready for an ARRAY of new terminology and concepts.

Ps. Have you had the chance to play the Grace Hopper game we made in episode 12. Check it out here! http://thoughtcafe.ca/hopper/

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Want to know more about Carrie Anne?
https://about.me/carrieannephilbin

The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

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Crash Course Computer Science OuttakesCrash Course Computer Science Outtakes
00:05:09April 19, 2017, 1:59 pm
Crash Course Computer Science Outtakes

Channel: CrashCourse & Total View: 53426


Add Date: April 19, 2017, 1:59 pm & Duration: 00:05:09


Likes: 1663 | Dislike: 81


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer science, compsci, computers, carrie anne philbin

In which Carrie Anne presents a new sing-a-long format and faces her greatest challenge yet - signing off an episode.

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Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Psychology of Computing: Crash Course Computer Science #38

Channel: CrashCourse & Total View: 71427


Add Date: December 6, 2017, 2:07 pm & Duration: 00:12:39


Likes: 2374 | Dislike: 51


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, psychology, usability, chunking, affordances, knurling, user interface, affective computing, emotional computing, Rosalind Picard, computer-mediated communications, augmented gaze, uncanny valley

We’ve spent most of this series talking about computers. Which makes sense - this is Crash Course COMPUTER SCIENCE after all. But at their core computers are tools employed by humans and humans are pretty complicated. So today, we’re going to discuss some psychological considerations in building computers like how to make them easier for humans to use, the uncanny valley problem when humanoid robots gets more and more humanlike, and strategies to make our devices work better with us by incorporating our emotions and even altering our gaze. Oh, and we'll talk about Carrie Anne's all time favorite user interface design principle - knurling.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Want to know more about Carrie Anne?
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The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

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Cybersecurity: Crash Course Computer Science #31Cybersecurity: Crash Course Computer Science #31
00:12:30October 11, 2017, 2:37 pm
Cybersecurity: Crash Course Computer Science #31

Channel: CrashCourse & Total View: 142034


Add Date: October 11, 2017, 2:37 pm & Duration: 00:12:30


Likes: 3516 | Dislike: 86


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, computation, cybersecurity, choosing good passwords, passwords. hacking, def con, denial of service attack, ddos, threat model, attack vector, bieber, brute force attack, bonnet, biometrics, finger print scanner, iris scanner, access control, read permission, write permission, malware, security kernel, virtual machines

Cybersecurity is a set of techniques to protect the secrecy, integrity, and availability of computer systems and data against threats. In today’s episode, we’re going to unpack these three goals and talk through some strategies we use like passwords, biometrics, and access privileges to keep our information as secure, but also as accessible as possible. From massive Denial of Service, or DDos attacks, to malware and brute force password cracking there are a lot of ways for hackers to gain access to your data, so we’ll also discuss some strategies like creating strong passwords, and using 2-factor authentication, to keep your information safe.

Check out Computerphile’s wonderful video on how to choose a password!
https://www.youtube.com/watch?v=3NjQ9b3pgIg

Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here!
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Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Want to know more about Carrie Anne?
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The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

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Operating Systems: Crash Course Computer Science #18

Channel: CrashCourse & Total View: 213047


Add Date: June 28, 2017, 2:13 pm & Duration: 00:13:36


Likes: 5010 | Dislike: 136


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer science, computers, compsci, comp ski, operating systems, unix, linux, windows, microsoft, ms-dos, android, iOS, macOS, multics, atlas supervisor, bsod, peripherals, i/o, drivers, multitasking, virtual memory, protected memory, time-sharing, terminal, kernel panic, bell labs, personal computers

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So as you may have noticed from last episode, computers keep getting faster and faster, and by the start of the 1950s they had gotten so fast that it often took longer to manually load programs via punch cards than to actually run them! The solution was the operating system (or OS), which is just a program with special privileges that allows it to run and manage other programs. So today, we’re going to trace the development of operating systems from the Multics and Atlas Supervisor to Unix and MS-DOS, and take at look at how these systems heavily influenced popular OSes like Linux, Windows, MacOS, and Android that we use today.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Educational Technology: Crash Course Computer Science #39

Channel: CrashCourse & Total View: 52222


Add Date: December 13, 2017, 3:12 pm & Duration: 00:11:52


Likes: 1828 | Dislike: 48


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, computation, technology, MOOC, virtual reality, augmented reality, tutoring, artificial intelligence, algorithms, domain model, bayesian knowledge tracing, classroom, data mining, virtual agents, direct brain learning, online video, online education, saint paul

Today we’re going to go a little meta and talk about how computer science can support learning with educational technology. We here at Crash Course are big fans of interactive in-class learning and hands-on experiences, but we also believe in the additive power of educational technology inside and outside the classroom from the Internet itself and Massive Open Online Courses, or MOOCs to AI driven intelligent tutoring systems and virtual reality.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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The Internet: Crash Course Computer Science #29The Internet: Crash Course Computer Science #29
00:11:58September 20, 2017, 2:47 pm
The Internet: Crash Course Computer Science #29

Channel: CrashCourse & Total View: 129063


Add Date: September 20, 2017, 2:47 pm & Duration: 00:11:58


Likes: 3367 | Dislike: 63


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, computer science, compsci, LAN, WAN, Internet, packet, TCP, TCP/IP, UDP, IP address, ISP, Internet Service Provider, checksum, domains, domain name, DNS, domain name system, subdomains, open system interconnection model, OSI model, world wide web, transmission control protocol, internet protocol, user datagram protocol, port number

Today, we're going to talk about how the Internet works. Specifically, how that stream of characters you punch into your browser's address bar, like "youtube.com", return this very website. Just to clarify we're talking in a broader sense about that massive network of networks connecting millions of computers together, not just the World Wide Web, which is a portion of the Internet, and our topic for next week. Today, we're going to focus on how data is passed back and forth - how a domain name is registered by the Domain Name System, and of course how the data requested or sent gets to the right person in little packets following standard Internet Protocol, or IP. We'll also discuss two different approaches to transferring this data: Transmission Control Protocol, or TCP, when we need to be certain no information is lost, and User Datagram Protocol, or UDP, for those time sensitive applications - because nobody wants an email with missing text, but they also don't want to get lag-fragged in their favorite first person shooter.

Want to run traceroute on your computer? See directions below. Remember you can replace "dftba.com" with whatever website you want!

Traceroute on Windows
1. Press the Start Button
2. Type "CMD" and press "Enter"
3....

Natural Language Processing: Crash Course Computer Science #36

Channel: CrashCourse & Total View: 83085


Add Date: November 22, 2017, 2:01 pm & Duration: 00:11:50


Likes: 2691 | Dislike: 45


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, computation, natural language processing, nlp, speech synthesis, speech, parse tree, parts-of-speech, knowledge graph, siri, google home, alexa, bixby, cortana, speech recognition, phonemes, language model, voice user interface

Today we’re going to talk about how computers understand speech and speak themselves. As computers play an increasing role in our daily lives there has been an growing demand for voice user interfaces, but speech is also terribly complicated. Vocabularies are diverse, sentence structures can often dictate the meaning of certain words, and computers also have to deal with accents, mispronunciations, and many common linguistic faux pas. The field of Natural Language Processing, or NLP, attempts to solve these problems, with a number of techniques we’ll discuss today. And even though our virtual assistants like Siri, Alexa, Google Home, Bixby, and Cortana have come a long way from the first speech processing and synthesis models, there is still much room for improvement.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Machine Learning & Artificial Intelligence: Crash Course Computer Science #34

Channel: CrashCourse & Total View: 171389


Add Date: November 1, 2017, 2:50 pm & Duration: 00:11:51


Likes: 5009 | Dislike: 71


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computers, computing, computer science, compsci, machine learning, artificial intelligence, deep learning, neural networks, ibm, watson, google, alpha go, siri, alexa, google assistant, self-driving cars, autonomous cars

So we've talked a lot in this series about how computers fetch and display data, but how do they make decisions on this data? From spam filters and self-driving cars, to cutting edge medical diagnosis and real-time language translation, there has been an increasing need for our computers to learn from data and apply that knowledge to make predictions and decisions. This is the heart of machine learning which sits inside the more ambitious goal of artificial intelligence. We may be a long way from self-aware computers that think just like us, but with advancements in deep learning and artificial neural networks our computers are becoming more powerful than ever.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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The Singularity, Skynet, and the Future of Computing: Crash Course Computer Science #40

Channel: CrashCourse & Total View: 136836


Add Date: December 21, 2017, 9:01 am & Duration: 00:12:30


Likes: 5002 | Dislike: 103


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, skynet, singularity, ubiquitous computing, terminator, artificial intelligence, autonomous cars, self-driving cars, superintelligence, John von Neumann, Paul Allen, technological unemployment, Ray Kurzweil, wearable computers, Jaron Lanier, digital ascension, robots, drones, 3d printing, bioninformatics, quantum computing, cryptocurrency, Carl Sagan

In our SERIES FINALE of Crash Course Computer Science we take a look towards the future! In the past 70 years electronic computing has fundamentally changed how we live our lives, and we believe it’s just getting started. From ubiquitous computing, artificial intelligence, and self-driving cars to brain computer interfaces, wearable computers, and maybe even the singularity there is so much amazing potential on the horizon. Of course there is also room for peril with the rise of artificial intelligence and more immediate displacement of much of the workforce through automation. It’s tough to predict how it will all shake out, but it’s our hope that this series has inspired you to take part in shaping that future. Thank you so much for watching.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Computer Networks: Crash Course Computer Science #28Computer Networks: Crash Course Computer Science #28
00:12:20September 13, 2017, 1:55 pm
Computer Networks: Crash Course Computer Science #28

Channel: CrashCourse & Total View: 126700


Add Date: September 13, 2017, 1:55 pm & Duration: 00:12:20


Likes: 3482 | Dislike: 41


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, networks, networking, telecommunications, world wide web, internet, LAN, ethernet, MAC address, WiFi, CSMA, bandwidth, switch, collision domain, message switching, router, packet switching, IP address, arpanet, TCP/IP, intent of things, iot

Today we start a three episode arc on the rise of a global telecommunications network that changed the world forever. We’re going to begin with computer networks, and how they grew from small groups of connected computers on LAN networks to eventually larger worldwide networks like the ARPANET and even the Internet we know today. We'll also discuss how many technologies like Ethernet, MAC addresses, IP Addresses, packet switching, network switches, and TCP/IP were implemented to new problems as our computers became ever-increasingly connected. Next week we’ll talk about the Internet, and the week after the World Wide Web!

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Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Crash Course Computer Science full episodeCrash Course Computer Science full episode
00:01:46February 9, 2018, 9:10 pm
Crash Course Computer Science full episode

Channel: atudha taigsaj & Total View: 0


Add Date: February 9, 2018, 9:10 pm & Duration: 00:01:46


Likes: 0 | Dislike: 0


Crash Course Computer Science full episode

Early Programming: Crash Course Computer Science #10

Channel: CrashCourse & Total View: 211372


Add Date: May 3, 2017, 2:00 pm & Duration: 00:09:26


Likes: 5048 | Dislike: 56


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, Programming, plugboards, punch cards, punched paper tape, Neumann architecture, panel programming, switches, jacquard, loom, computers, computing, computer science, programming languages, history

Since Joseph Marie Jacquard’s textile loom in 1801, there has been a demonstrated need to give our machines instructions. In the last few episodes, our instructions were already in our computer’s memory, but we need to talk about how they got there - this is the heart of programming. Today, we’re going to look at the history of programming and the innovations that brought us from punch cards and punch paper tape to plugboards and consoles of switches. These technologies will bring us to the mid 1970s and the start of home computing, but they had limitations, and what was really needed was an easier and more accessible way to write programs - programming languages. Which we’ll get to next week.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Want more Crash Course in person? We'll be at NerdCon: Nerdfighteria in Boston on February 25th and 26th! For more information, go to http://www.nerdconnerdfighteria.com/

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Advanced CPU Designs: Crash Course Computer Science #9

Channel: CrashCourse & Total View: 237126


Add Date: April 26, 2017, 5:39 pm & Duration: 00:12:23


Likes: 6769 | Dislike: 90


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, cpu, dual core, quad core, multi-core, flops, processor, dirty bit, superscalar, instruction pipelining, bus, branch prediction, supercomputer, cluster, cache hit, cache miss, intel, amd, crisis, sunway taihulight

So now that we’ve built and programmed our very own CPU, we’re going to take a step back and look at how CPU speeds have rapidly increased from just a few cycles per second to gigahertz! Some of that improvement, of course, has come from faster and more efficient transistors, but a number hardware designs have been implemented to boost performance. And you’ve probably heard or read about a lot of these - they’re the buzz words attached to just about every new CPU release - terms like instruction pipelining, cache, FLOPS, superscalar, branch prediction, multi-core processors, and even super computers! These designs are pretty complicated, but the fundamental concepts behind them are not. So bear with us as we introduce a lot of new terminology including what might just be the best computer science term of all time: the dirty bit. Let us explain.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

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3D Graphics: Crash Course Computer Science #273D Graphics: Crash Course Computer Science #27
00:12:41September 6, 2017, 3:19 pm
3D Graphics: Crash Course Computer Science #27

Channel: CrashCourse & Total View: 122548


Add Date: September 6, 2017, 3:19 pm & Duration: 00:12:41


Likes: 4453 | Dislike: 46


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, computation, graphics, 3d graphics, wireframe, rendering, projection, polygons, mesh, polygon count, scanline rendering, antialiasing, painter’s algorithm, z-buffer, z-fighting, glitches, back-face culling, shading, lighting, texture, teapot, texture mapping, gpu, graphics card

Today we’re going to discuss how 3D graphics are created and then rendered for a 2D screen. From polygon count and meshes, to lighting and texturing, there are a lot of considerations in building the 3D objects we see in our movies and video games, but then displaying these 3D objects of a 2D surface adds an additional number of challenges. So we’ll talk about some of the reasons you see occasional glitches in your video games as well as the reason a dedicated graphics processing unit, or GPU, was needed to meet the increasing demand for more and more complex graphics.

Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here!
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Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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The Personal Computer Revolution: Crash Course Computer Science #25

Channel: CrashCourse & Total View: 88037


Add Date: August 23, 2017, 2:08 pm & Duration: 00:10:15


Likes: 2545 | Dislike: 32


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, personal computers, computing, computers, altair, ibm, apple, tandy, basic, steve jobs, steve wozniak, bill gates, commodore, DOS, open architecture, close architecture, ibm compatible, macintosh, paul allen, microcomputer, kenback-1, mcm/70

Today we're going to talk about the birth of personal computing. Up until the early 1970s components were just too expensive, or underpowered, for making a useful computer for an individual, but this would begin to change with the introduction of the Altair 8800 in 1975. In the years that follow, we'll see the founding of Microsoft and Apple and the creation of the 1977 Trinity: The Apple II, Tandy TRS-80, and Commodore PET 2001. These new consumer oriented computers would become a huge hit, but arguably the biggest success of the era came with the release of the IBM PC in 1981. IBM completely changed the industry as its "IBM compatible" open architecture consolidated most of the industry except for, notably, Apple. Apple chose a closed architecture forming the basis of the Mac Vs PC debate that rages today. But in 1984, when Apple was losing marketshare fast it looked for a way to offer a new user experience like none other - which we'll discuss next week.

Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here!
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Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Graphical User Interfaces: Crash Course Computer Science #26

Channel: CrashCourse & Total View: 98972


Add Date: August 30, 2017, 2:09 pm & Duration: 00:12:59


Likes: 2908 | Dislike: 36


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computers, computer science, graphical user interface, macintosh, apple, xerox, alto, douglas englebart, mother of all demos, xerox parc, wimp, interface, gui, wysiwyg, ibm pc, apple lisa, windows, microsoft, windows 95, microsoft bob

Today, we're going to discuss the critical role graphical user interfaces, or GUIs played in the adoption of computers. Before the mid 1980's the most common way people could interact with their devices was through command line interfaces, which though efficient, aren't really designed for casual users. This all changed with the introduction of the Macintosh by Apple in 1984. It was the first mainstream computer to use a GUI, standing on the shoulder of nearly two decades of innovation including work from the father of the GUI himself, Douglas Englebart, and some amazing breakthroughs at Xerox Parc.


Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here!
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Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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Crash Course Computer Science PreviewCrash Course Computer Science Preview
00:02:45February 15, 2017, 12:00 pm
Crash Course Computer Science Preview

Channel: CrashCourse & Total View: 834813


Add Date: February 15, 2017, 12:00 pm & Duration: 00:02:45


Likes: 21134 | Dislike: 378


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer science, computers, computing, programming, computation, computer engineering, electrical engineering, software, hardware, pbs digital studios, pbs, raspberry pi, arduino, bsod, internet, youtube, smart cars, artificial intelligence, geek gurl diaries, Carrie Anne Philbin

Starting February 22nd, Carrie Anne Philbin will be hosting Crash Course Computer Science! In this series, we're going to trace the origins of our modern computers, take a closer look at the ideas that gave us our current hardware and software, discuss how and why our smart devices just keep getting smarter, and even look towards the future! Computers fill a crucial role in the function of our society, and it's our hope that over the course of this series you will gain a better understanding of how far computers have taken us and how far they may carry us into the future.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Want to know more about Carrie Anne?
https://about.me/carrieannephilbin

Want more Crash Course in person? We'll be at NerdCon: Nerdfighteria in Boston on February 25th and 26th! For more information, go to http://www.nerdconnerdfighteria.com/

The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

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Electronic Computing: Crash Course Computer Science #2

Channel: CrashCourse & Total View: 535769


Add Date: March 1, 2017, 3:28 pm & Duration: 00:10:44


Likes: 12656 | Dislike: 159


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computers, computation, computer science, electronic computers, eniac, colossus, history, hollerith machine, carrie anne philbin, tommy flowers, harvard mark 1, relay, triode, vacuum tube, transistor, grace hopper, Bletchley park, alan turing, bombe, enigma codes, sage, bell labs, silicon valley, intel, fairchild semiconductors

So we ended last episode at the start of the 20th century with special purpose computing devices such as Herman Hollerith’s tabulating machines. But as the scale of human civilization continued to grow as did the demand for more sophisticated and powerful devices. Soon these cabinet-sized electro-mechanical computers would grow into room-sized behemoths that were prone to errors. But is was these computers that would help usher in a new era of computation - electronic computing.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list...

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