crash course.computer science - New Videos

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: 1067644


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


Likes: 26033 | Dislike: 453


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.

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Operating Systems: Crash Course Computer Science #18

Channel: CrashCourse & Total View: 272935


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


Likes: 5818 | Dislike: 172


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.

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Hackers & Cyber Attacks: Crash Course Computer Science #32

Channel: CrashCourse & Total View: 148533


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


Likes: 3788 | Dislike: 85


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

Channel: CrashCourse & Total View: 667122


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


Likes: 15334 | Dislike: 213


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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Medieval China: Crash Course History of Science #8

Channel: CrashCourse & Total View: 137759


Add Date: May 21, 2018, 3:30 pm & Duration: 00:12:22


Likes: 4492 | Dislike: 83


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, china, chinese history, chinese science, medieval china, the grand canal, history of science

Like Egypt, Sumer, and Mesoamerica, ancient China represents a hydraulic civilization—one that maintained its population by diverting rivers to aid in irrigation—and one that developed writing thousands of years ago. Today, we’re going to focus on the time of the Northern and Southern Song Dynasties, a time of great technical innovation. But, before we get to the Song, let’s take a tour through the ages and explore key elements of Chinese scientific culture.

***

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Registers and RAM: Crash Course Computer Science #6

Channel: CrashCourse & Total View: 446466


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


Likes: 10732 | Dislike: 134


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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Programming Basics: Statements & Functions: Crash Course Computer Science #12

Channel: CrashCourse & Total View: 206052


Add Date: May 17, 2017, 1:59 pm & Duration: 00:11:57


Likes: 4713 | Dislike: 65


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, programming, programming languages, conditional, statements, functions, control flow statements, if statement, else statement, while loop, for loop, modularizing, libraries, variables, grace hopper, harvard mark 1

Today, Carrie Anne is going to start our overview of the fundamental building blocks of programming languages. We’ll start by creating small programs for our very own video game to show how statements and functions work. We aren’t going to code in a specific language, but we’ll show you how conditional statements like IF and ELSE statements, WHILE loops, and FOR loops control the flow of programs in nearly all languages, and then we’ll finish by packaging up these instructions into functions that can be called by our game to perform more and more complex actions.

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Educational Technology: Crash Course Computer Science #39

Channel: CrashCourse & Total View: 61931


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


Likes: 1991 | Dislike: 52


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.

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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: 140657


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


Likes: 4776 | Dislike: 50


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.

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

Channel: CrashCourse & Total View: 169687


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


Likes: 4456 | Dislike: 68


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.

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Software Engineering: Crash Course Computer Science #16

Channel: CrashCourse & Total View: 299835


Add Date: June 14, 2017, 4:00 pm & Duration: 00:10:35


Likes: 6716 | Dislike: 127


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, software engineering, object oriented programming, computes, computer science, compsci, programming, software, alpha, beta, quality assurance, source control, repository, readme, integrated development environment, eclipse, microsoft visual studio, notepad, C++, python, Java, Margaret Hamilton, objects, application programming interface, microsoft office

Today, we’re going to talk about how HUGE programs with millions of lines of code like Microsoft Office are built. Programs like these are way too complicated for a single person, but instead require teams of programmers using the tools and best practices that form the discipline of Software Engineering. We'll talk about how large programs are typically broken up into into function units that are nested into objects known as Object Oriented Programming, as well as how programmers write and debug their code efficiently, document and share their code with others, and also how code repositories are used to allow programmers to make changes while mitigating risk.

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/

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Data Structures: Crash Course Computer Science #14

Channel: CrashCourse & Total View: 258128


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


Likes: 5314 | Dislike: 93


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

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How Computers Calculate - the ALU: Crash Course Computer Science #5

Channel: CrashCourse & Total View: 456748


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


Likes: 10095 | Dislike: 126


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...

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: 173655


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


Likes: 4202 | Dislike: 55


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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Early Programming Crash Course Computer Science #10

Channel: Royal Institute of Technology and Science & Total View: 3


Add Date: May 3, 2017, 10:05 pm & Duration: 00:09:27


Likes: 0 | Dislike: 0


Tags:

Computer Science

Video Credits: CrashCourse

Science Journalism: Crash Course Statistics #11Science Journalism: Crash Course Statistics #11
00:10:42April 11, 2018, 2:00 pm
Science Journalism: Crash Course Statistics #11

Channel: CrashCourse & Total View: 29601


Add Date: April 11, 2018, 2:00 pm & Duration: 00:10:42


Likes: 1458 | Dislike: 20


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, statistics, stats, ap stats, ap statistics, science, journalism, reporting, click bait, sensationalism, miracle, food, drug, weight loss, statistical test, bad science, peer review, control trial

We’ve talked a lot in this series about how often you see data and statistics in the news and on social media - which is ALL THE TIME! But how do you know who and what you can trust? Today, we’re going to talk about how we, as consumers, can spot flawed studies, sensationalized articles, and just plain poor reporting. And this isn’t to say that all science articles you read on facebook or in magazines are wrong, but that it's valuable to read those catchy headlines with some skepticism.

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Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

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

Channel: CrashCourse & Total View: 390166


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


Likes: 8459 | Dislike: 105


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

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The First Programming Languages: Crash Course Computer Science #11

Channel: CrashCourse & Total View: 300218


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


Likes: 6965 | Dislike: 124


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

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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...

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

Channel: CrashCourse & Total View: 153213


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


Likes: 5387 | Dislike: 112


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

Channel: CrashCourse & Total View: 256749


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


Likes: 6578 | Dislike: 98


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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Psychology of Computing: Crash Course Computer Science #38

Channel: CrashCourse & Total View: 82292


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


Likes: 2562 | Dislike: 55


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.

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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: 82305


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


Likes: 2569 | Dislike: 50


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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Crash Course Computer Science 1серия (перевод)

Channel: Nadezhda Sorokina & Total View: 61


Add Date: August 1, 2017, 11:53 pm & Duration: 00:11:54


Likes: 1 | Dislike: 1


Пилотный выпуск
Оригинальное видео: https://www.youtube.com/watch?v=O5nskjZ_GoI

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: 91028


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


Likes: 2949 | Dislike: 45


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

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

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Files & File Systems: Crash Course Computer Science #20

Channel: CrashCourse & Total View: 163422


Add Date: July 12, 2017, 3:07 pm & Duration: 00:12:03


Likes: 4136 | Dislike: 75


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer, computer science, compsci, file formats, file systems, txt, wave, wav, bitmap, bmp, root directory, file path, defrag, defragmentation, magnetic tape, fragmentation

Today we’re going to look at how our computers read and interpret computer files. We’ll talk about how some popular file formats like txt, wave, and bitmap are encoded and decoded giving us pretty pictures and lifelike recordings from just strings of 1’s and 0’s, and we’ll discuss how our computers are able to keep all this data organized and readily accessible to users. You’ll notice in this episode that we’re starting to talk more about computer users, not programmers, foreshadowing where the series will be going in a few episodes.

Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here!
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Crash Course Physics episode on sound:
https://www.youtube.com/watch?v=qV4lR9EWGlY

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

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Representing Numbers and Letters with Binary: Crash Course Computer Science #4

Channel: CrashCourse & Total View: 500229


Add Date: March 15, 2017, 2:23 pm & Duration: 00:10:46


Likes: 11685 | Dislike: 162


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, binary, unicode, ascii, boolean, computers, computing, 8-bit, 32-bit, 64-bit, byte, megabyte, gigabyte, kilobyte, emoji, memory, interoperability, mojibake, true, false, computer science, adding binary, encoding schemes

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Today, we’re going to take a look at how computers use a stream of 1s and 0s to represent all of our data - from our text messages and photos to music and webpages. We’re going to focus on how these binary values are used to represent numbers and letters, and discuss how our need to perform operations on larger and more complex values brought us from our 8-bit video games to beautiful Instagram photos, and from unreadable garbled text in our emails to a universal language encoding scheme.


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Screens & 2D Graphics: Crash Course Computer Science #23

Channel: CrashCourse & Total View: 112789


Add Date: August 9, 2017, 3:15 pm & Duration: 00:11:32


Likes: 3038 | Dislike: 46


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computing, computers, crash course computer science, compsci, computation, graphics, monitor, screens, sketchpad, ivan sutherland, cad, spacewar!, crt, cathode ray tubes, raster scanning, pixels, vector scanning, liquid crystal displays, lcd, rom, character generator, ascii art, ibm cp437, vectrex, light pen, gui

Today we begin our discussion of computer graphics. So we ended last episode with the proliferation of command line (or text) interfaces, which sometimes used screens, but typically electronic typewriters or teletypes onto paper. But by the early 1960s a number of technologies were introduced to make screens much more useful from cathode ray tubes and graphics cards to ASCII art and light pens. This era would mark a turning point in computing - computers were no longer just number crunching machines, but potential assistants interactively augmenting human tasks. This was the dawn of graphical user interfaces which we’ll cover more in a few episodes.

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

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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: 219357


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


Likes: 5517 | Dislike: 113


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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Natural Language Processing: Crash Course Computer Science #36

Channel: CrashCourse & Total View: 106945


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


Likes: 3111 | Dislike: 51


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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Crash Course Computer Science - Второй выпуск (перевод)

Channel: Nadezhda Sorokina & Total View: 25


Add Date: August 22, 2017, 12:36 am & Duration: 00:10:17


Likes: 2 | Dislike: 0


Electronic Computing - электронные вычисления.
Переведено с канала Crash Course Computer Science
Ссылка : https://www.youtube.com/watch?v=LN0ucKNX0hc&t=532s

PS: надеюсь, вы мне простите ужасный звук. Над ним уже ведутся работы.
Спасибо, приятного просмотра!

The Cold War and Consumerism: Crash Course Computer Science #24

Channel: CrashCourse & Total View: 116181


Add Date: August 16, 2017, 2:54 pm & Duration: 00:11:19


Likes: 2868 | Dislike: 66


Tags:

John Green, Hank Green, vlogbrothers, Crash Course, crashcourse, education, computer science, crash course computer science, compsci, cold war, consumerism, eniac, univac, member, vannevar bush, national science foundation, nsf, japan, transistor radio, sputnik, space race, nasa, apollo, apollo guidance computer, integrated circuits, minuteman, polaris, supercomputers, cdc, cray, ibm, sharp, casio, sony, busicom, pong, altair, atari

Today we’re going to step back from hardware and software, and take a closer look at how the backdrop of the cold war and space race and the rise of consumerism and globalization brought us from huge, expensive codebreaking machines in the 1940s to affordable handhelds and personal computers in the 1970s. This is an era that saw huge government funded projects - like the race to the moon. And afterward, a shift towards the individual consumer, commoditization of components, and the rise of the Japanese electronics industry.

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

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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: 214680


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


Likes: 4470 | Dislike: 115


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

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

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