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Electronic Computing: Crash Course Computer Science #2

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Electronic Computing: Crash Course Computer Science #2



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.

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33 Comments

33 Comments

  1. @AubreeGames

    October 12, 2024 at 8:09 pm

    Love the history overview! Thanks so much for this fascinating series!

  2. @farikkun1841

    October 12, 2024 at 8:09 pm

    after knowing how computer and transistor, it definittely change how i view the everyday use of computer devices

  3. @amateurastronomer2624

    October 12, 2024 at 8:09 pm

    How to make notes of this video😪

  4. @machiox7617

    October 12, 2024 at 8:09 pm

    Someone, please explain to me from 2:07 to 2:16 part.
    What does she mean can Connect to another circuit?
    Which circuit? What type of circuit? What type of motor is she talking about?
    Which increment a count on gear, what does it mean?

  5. @ebubenwokeoma2176

    October 12, 2024 at 8:09 pm

    I love what you are doing keep it up

  6. @Lemon-ej4pn

    October 12, 2024 at 8:09 pm

    I just keep thinking about what happened after independence 1947 and what before that to remember the timeline of mk1 einac and so on.

  7. @cuddledog142

    October 12, 2024 at 8:09 pm

    Episode 2: Electronic Computing

    The globalisation following the early 1900s resulted in an explosion of complexity and data, driving the increasing need for automation and computation. Electro-mechanic computers grew to room-sized machines, prone to errors and expensive to maintain.

    Mechanical Relays

    The Harvard Mark I was one of the largest electromechanical computers, build in 1944 by IBM. The brains of an electro-mechanical computer where mechanical relays, electronically controlled mechanical switches. These use a control wire containing a coil, producing a magnetic field to control the flow of electricity.

    Limitations: A downside of mechanical relays is that the mechanical arm can’t move instantly between open and closed states (a good relay could flick 45 times per second). Another limitation was wear and tear; over time things get stuck or fail, and with 35000 relays in the Harvard Mark I, maintenance adds up. Also, the warm and dark environments attracted bugs leading to the first computer bug in 1947, a physical moth found in a relay by Grace Hopper.

    Flemings Valve & Vacuum Tubes

    A faster and more reliable alternative to mechanical relays was needed, and it came in the form of the Flemings Valve. The Thermionic Valve contained two electrodes in an air-tight glass bulb, this was the first vacuum tube. One electrode could be heated, causing it to emit electrons, the other electrode could then attract those electrons to create the flow of our electric faucet.

    Any electronic component that permits the one-way flow of current is called a diode. But containing a control electrode, we could permit the flow of electrons. Because of the lack of moving parts, these “vacuum tubes” could switch thousands of times per second. Although they were a huge improvement on mechanical switches, they weren’t perfect. Vacuum tubes were expensive, and still burned out occasionally. This marked the shift from electro-mechanical computing to electronic computing.

    The first large scale use of vacuum tubes for computing was the Colossus Mk 1, designed by Tommy Flowers in 1943. It was used to decrypt Nazi communications. This may sound familiar because two years earlier Alan Turning design and electro-mechanical machine called the Turing machine to break Nazi enigma codes called “The Bombe”. The Colossus used 1600 vacuum tubes and is regarded as the first programmable, electronic computer.
    ENIAC (Electronic Numerical Integrator and Calculator) completed in 1946 was the first first truly general-purpose programmable computer. It is estimated it completed more arithmetic than humanity before it’s operation. Unfortunately, it required a lot of maintenance with about 50% down time. Vacuum-tube computing was reaching its limits.

    Transistors
    To reduce cost and size, and to improve reliability and speed, a new electronic switch was needed. In 1947 the transistor was born. A transistor is just like a relay switch which can be opened and closed by applying electrical power via a control wire. Transistors have two electrodes separated by a material that can sometimes conduct electricity and other times resist it (semi-conductor) , the most common being silicone. The control wire is attached to the gate electrode. By changing the electrical charge of the gate, the conductivity of the semiconducting material can be changed.

    Even the first transistors could change states 10,000 times per second. Also, because the transistors are made of solid material, a “solid state component”, they were much more reliable and could be made much smaller than vacuum tubes. Today’s computers use transistors that are smaller than 50 nanometres and can switch states millions of times per second. Most of the semiconductor development happened in the San Jose / San Francisco area leading to the area being nicknamed “Silicone Valley”.

  8. @MangaBottle

    October 12, 2024 at 8:09 pm

    Dumb question — who else learned about ENIAC thanks to Digimon? 😅

  9. @bhuvanesh1

    October 12, 2024 at 8:09 pm

    So to understand computers, I need to learn about, electrons and diodes. COOL. I don't why, If I want to learn something, I will go so deep in to that I forget the topic I should be studying. Anway I will learn about electrons and come back here.

  10. @Ren_AmamiyaP5

    October 12, 2024 at 8:09 pm

    Thanks for Tutorial its help me create Cpu for Minecraft

  11. @SirMika9

    October 12, 2024 at 8:09 pm

    This course is so cool.

  12. @bikdigdaddy

    October 12, 2024 at 8:09 pm

    one of the best series i'm binge watchin and totally worth it!!

  13. @D0J0P

    October 12, 2024 at 8:09 pm

    Is it okay that I don't quite understand every single thing about all the old technologies? I'm thinking of Googling some of the things(like what's a diode), but should I not go too crazy with it and move on?

  14. @ajackgames5380

    October 12, 2024 at 8:09 pm

    Yeah, these videos rock!!!!!!!

  15. @scuti7073

    October 12, 2024 at 8:09 pm

    Harvard MK2 electromechanical relays
    Colossus Mk1 used vacuum tube (thermionic electron émission)
    Plugboard program vs telephone switchboard
    Eniac

  16. @jangmanbnb

    October 12, 2024 at 8:09 pm

    Thanks. Always good to come back and watch it again. It's my 3rd time! Thank you so much for the great work.

  17. @oddsmith5872

    October 12, 2024 at 8:09 pm

    Yeah baby yeah

  18. @DN-sl9qb

    October 12, 2024 at 8:09 pm

    That’s Jeff Bezos at 0:52

  19. @ldpenrose

    October 12, 2024 at 8:09 pm

    Still a good watch

  20. @himangeetandan

    October 12, 2024 at 8:09 pm

    This channel is really the best to start the basics on upskilling yourself. May be 3 years ago these people got me interested in Psychology and now in Computer Science, even after having Commerce and Accountancy as my major currently in High School!
    Thanks, Crashcourse!🥰

  21. @TheOriginalGN

    October 12, 2024 at 8:09 pm

    I’m a senior computer science student, and although I’ve been taught a good amount on the history, this channel blows those classes out the water. Thank you for your hard work!

  22. @aloky247

    October 12, 2024 at 8:09 pm

    Cramming so much valuable information in ten minutes? Not a good idea.

  23. @13thravenpurple94

    October 12, 2024 at 8:09 pm

    Great video THank you

  24. @zerriep19

    October 12, 2024 at 8:09 pm

    whoever is the writer of this presentation and the presenter herself, I salute you. Its so engaging.

  25. @jeffreyohler2599

    October 12, 2024 at 8:09 pm

    1:07 Wow listen to those stats. 500 miles of wire!! 😳😅😂🤣😳

  26. @afettene

    October 12, 2024 at 8:09 pm

    This is super cool!

  27. @pil3driverwaltz164

    October 12, 2024 at 8:09 pm

    Best explanation of how a transistor works 👏

  28. @peterthorne3728

    October 12, 2024 at 8:09 pm

    Colossus ! ?

  29. @peterthorne3728

    October 12, 2024 at 8:09 pm

    Colossus the heat from all those vales tubes

  30. @anissaprameswari

    October 12, 2024 at 8:09 pm

    Did I just saw oppenheimer on 0:53 ?

  31. @MoyuGuy

    October 12, 2024 at 8:09 pm

    im not very interested in the history i kinda just want the info. that start on ep3?

  32. @zahuyyentertainment3548

    October 12, 2024 at 8:09 pm

    she speaks freaking fast. seems lile she has to put everything in 10 minute at any cost

  33. @daniel87117

    October 12, 2024 at 8:09 pm

    Love this video , subscribed and hit the bell!

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Servers computers

New Home Backup Server (Dell T640 with 18 20TB Disks)

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New Home Backup Server (Dell T640 with 18 20TB Disks)



In this video I create a new backup server from a Dell EMC PowerEdge T640 with 18x 20TB Seagate Exos refurbished drives. Also there’s some more ranting about backups in general. But idk, there are chapters so you can skip to whatever. And it’s not technically a server, in that it doesn’t serve files. It’s really more of a client that takes files from other servers and holds onto them. But I call it a backup server because hardware-wise it’s a server. Anywho, that’s the description. It’s probably not optimal for the YouTube algorithm, but hey, I’m not an influencer even though I have a TikTok account that I don’t use.

Update: https://www.youtube.com/watch?v=Secv5P01k2M&t=5195

00:00 Intro
02:08 The Drives
03:30 The Data & Other Backups
05:40 RAID & Data Loss
10:00 IcyDock ExpressCage
13:23 Fan Noise
18:30 Caddies, Trays, or Sleds.. Whatever
28:27 Booting & Array Creation
33:50 Array Build Status and Drive Stats
36:43 OS SSDs and T640 Internals
58:20 Lengthy Conclusion (Backups Rant.. again)
1:10:20 Outro .

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How to Configure iDRAC9 at Initial Setup of Your Dell PowerEdge Server

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How to Configure iDRAC9 at Initial Setup of Your Dell PowerEdge Server



For more information on the configuration of an iDRAC 9 please visit our knowledge base: http://www.dell.com/support/article/SLN306877

During the initial startup of your new Dell Server, you have to configure the iDRAC to be able to manage your Dell PowerEdge server remotely. In this video you will learn how to configure the iDRAC9 of your Server for the first time.
The iDRAC 9 is configured with a default IP which you can change during the initial setup.
You can access the iDRAC via a dedicated Network Card or the LAN on Motherboard after it is configured.

🔴 For more helpful tutorials, tips and tricks for Dell EMC Products, subscribe to our channel: http://www.youtube.com/DellEnterpriseSupport?sub_confirmation=1

Want to know more about iDRAC, check out this Playlist:

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Now Available in Lenovo ThinkSystem SR645 Rack Servers

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Now Available in Lenovo ThinkSystem SR645 Rack Servers



Lenovo is excited to deliver AMD EPYC™ processors with AMD 3D V-Cache™ technology in its ThinkSystem SR645 rack servers. These new systems feature expanded L3 cache designed for technical computing workloads—helping customers get new products to market faster than ever before.  

Discover more: https://www.amd.com/en/events/epyc

*See claims information in video endnotes.

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Best Public Bedrock SMP Server to Join!

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Best Public Bedrock SMP Server to Join!



Best Public Bedrock SMP Server to Join!
Come join this Minecraft Valatic SMP on Java or Bedrock on any device! Join this active server with your friends or by yourself for completely free!

Server IP ➤ play.valatic.net
Bedrock PORT ➤ 19132
SMP Store (HUGE SALE) ➤ https://store.valatic.net
Use code BLUEJAY to save on your purchase! Purchase crate-keys, ranks, and more on the Valatic store.
SMP Discord Server ► https://discord.gg/valatic

To join the Public Minecraft Valatic SMP, watch the ENTIRE VIDEO for the server ip and port. Also, leave all your questions in the comments and I’ll do my best to answer!

The Public Minecraft Valatic SMP is just like the Dream smp and Lifesteal smp and you can join on Minecraft java, bedrock, or pocket edition. You can join anytime for completely free with your friends, or make some on the SMP! The server has an active, growing player base, exciting events, awesome server features, professional staff, and the world map is always expanding so you can explore! You can make friends with other players on the server at the spawn, or smp clubhouse too! There is even a server shop to get awesome items that support the Valatic SMP so it can keep the server running! On the Valatic SMP you can travel to many server locations, build cities, explore land, and even start governments or massive server wars! There are even different game modes on the server like Minecraft Lifesteal SMP, Earth SMP, and One Block! The possibilities on the Public Minecraft Valatic SMP are endless so join now and get started!

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Computer Security | Types of Computer Security | Cybersecurity Course | Edureka

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Computer Security | Types of Computer Security | Cybersecurity Course | Edureka



🔵Edureka Cyber Security Masters Program: https://bit.ly/3pfHHIN
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This Edureka video gives an introduction to Computer Security and the types of computer security. Also, it teaches you various ways to secure your computer devices. Topics covered in this video includes:

1. What is Computer security?
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4. Potential losses due to cyber attacks
5. How to secure?

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Cybersecurity is the combination of processes, practices, and technologies designed to protect networks, computers, programs, data and information from attack, damage or unauthorized access.

Edureka’s Cybersecurity Certification Course will help you in learning about the basic concepts of Cybersecurity along with the methodologies that must be practiced ensuring information security of an organization. Starting from the Ground level Security Essentials, this course will lead you through Cryptography, Computer Networks & Security, Application Security, Data & Endpoint Security, idAM (Identity & Access Management), Cloud Security, Cyber-Attacks and various security practices for businesses.

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Cybersecurity is the gathering of advances that procedures and practices expected to ensure systems, PCs, projects and information from assault, harm or unapproved get to. In a processing setting, security incorporates both cybersecurity and physical security, it is imperative since cyberattackers can without much of a stretch take and obliterate the profoundly grouped data of governments, defense offices and banks for which the results are huge so it is essential to have an appropriate innovation which an avoid digital wrongdoings.

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Objectives of Edureka Cyber Security Course

This course is designed to cover a holistic & a wide variety of foundational topics of the cybersecurity domain which will be helpful to lead freshers as well as IT professional having 1 to 2 years of experience, into the next level of choice such as ethical hacking/ audit & compliance / GRC/ Security Architecture and so on
This course focuses mainly on the basics concepts of Cyber Security
In this course, we are going to deal with Ground level security essentials cryptography, computer networks & security, application security, data & endpoint security, idAM (identity & access management), cloud security, cyber-attacks and various security practices for businesses
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The Man Who Revolutionized Computer Science With Math

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The Man Who Revolutionized Computer Science With Math



Leslie Lamport revolutionized how computers talk to each other. The Turing Award-winning computer scientist pioneered the field of distributed systems, where multiple components on different networks coordinate to achieve a common objective. (Internet searches, cloud computing and artificial intelligence all involve orchestrating legions of powerful computing machines to work together.) In the early 1980s, Lamport also created LaTeX, a document preparation system that provides sophisticated ways to typeset complex formulas and format scientific documents. In 1989, Lamport invented Paxos, a “consensus algorithm” that allows multiple computers to execute complex tasks; without it, modern computing could not exist. He’s also brought more attention to a handful of problems, giving them distinctive names like the bakery algorithm and the Byzantine Generals Problem. Lamport’s work since the 1990s has focused on “formal verification,” the use of mathematical proofs to verify the correctness of software and hardware systems. Notably, he created a “specification language” called TLA+ (for Temporal Logic of Actions), which employs the precise language of mathematics to prevent bugs and avoid design flaws.

Read more at Quanta Magazine: https://www.quantamagazine.org/bringing-mathematical-perfection-to-software-20220516/

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