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  • A

    Consonants: /θ/ & /ð/

    English pronunciation
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    15 Views
    A
    Visualization of English sounds here. https://soundsofspeech.uiowa.edu/ https://soundsofspeech.uiowa.edu/assets/images/sos-video.mp4
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    Vowels /æ/, /ʌ/, /a:/

    English pronunciation
    2
    0 Votes
    2 Posts
    14 Views
    A
    Visualization of English sounds here. https://soundsofspeech.uiowa.edu/ https://soundsofspeech.uiowa.edu/assets/images/sos-video.mp4
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    Study English by doing Programming

    Study English by doing Programming
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    1 Posts
    19 Views
    No one has replied
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    Lesson 1

    Algorithms and Assembly, C++ programming languages
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    A
    Hello World in assembly language Assembly-hello Hello World in C++ C++ hello
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    Lesson 1

    Raspberry Pi and ESP32 Programming
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    Open esp32simulator. Create the folder "blinky" in the directory "esp32projects". Create "main.py", "diagram.json" inside the folder "blinky". Connect all components with wires in the same way, as in the picture. You can rotate a component by pressing Ctrl+R. The resistor must be connect to D15. Pay attention to LED, since it emits light only if it's connected correctly. The current must go from an anode to a cathode (LED will not emit light if you connect it in the opposite direction). [image: 1743493140012-blinky.png] Paste the next code to main.py. from machine import Pin from utime import sleep led = Pin(15, Pin.OUT) #makes Pin 15 an output while True: led.on() #turns on LED sleep(2) #time delay 2 seconds led.off() #turns off LED sleep(2) Click the green button to run the project. You should see a blinking LED. Save your project to the local folder "blinky". Copy-paste the code from the files "main.py", "diagram.json" in the simulator to your local files. Make a screenshot of the circuit and save the screenshot to the folder "blinky". Whenever you want to continue programming you can copy-paste the code from the local files to your simulator (Note. The circuit is stored in the file "diagram.json", you don't need to make a new circuit all the time).
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    Lesson 1

    AVR Microcontroller and Arduino Programming
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    You can make a real circuit and use blinking LED for a Christmas tree or put it in a toy police car and give it as a gift to children.
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    Lesson 2

    JavaScript programming
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    The output of the program is a flying ball. Ballistic
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    Lesson 1

    JavaScript programming
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    <!DOCTYPE html> <html> <head> <script language="JavaScript"> document.write('<br>'); document.write("hello"); </script> </head> <body> </body> </html>
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    Numerical analysis

    Information technology
    2
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    2 Posts
    14 Views
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    https://projecteuler.net/archives
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    Egyptian pyramids

    History
    1
    0 Votes
    1 Posts
    13 Views
    No one has replied
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    Chip manufacturing

    Engineering
    2
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    2 Posts
    13 Views
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    https://www.youtube.com/watch?v=bor0qLifjz4 https://www.youtube.com/watch?v=Q5paWn7bFg4
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    Gene editing tools-artTALEs

    Biology
    1
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    1 Posts
    10 Views
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    Honey bee dance communication system

    Biology
    1
    0 Votes
    1 Posts
    6 Views
    No one has replied
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    Ant language

    Biology
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    3 Posts
    14 Views
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    Another version of the maze, which was used by scientists, is a comb of 15 end points. The further the bait is from the entrance, the more time the scout needs to describe the path to the foragers. But if you place a bait on any branch more often, then the ants begin to use this branch as a new point of reference. If branch number 10 is often used, then a little more than 10 times are spent to describe the path to 11 branches — that is, ants describe the path as “10 + 1”. And exactly the same result in time shows a twig 9 - that is, "10-1". This is reminiscent of the Roman system of calculus - X, XI, IX. So scientists have proven that ants are able to add and subtract.
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    Encyclopedia of Molecular Biology

    Biology
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    Nucleic acids are macromolecules made up of smaller molecules called nucleotides. There are two types of nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleotides are linked together by means of links forming a chain. The nucleotides of DNA are called thymine (T), adenine (A), cytosine (C), and guanine (G). DNA differs from RNA in that it contains a T, while RNA includes a uracil (U) in its place. Although each organism’s DNA is unique, all DNA is composed of the same nitrogen-based molecules. But then, how does DNA differ from one organism to another? it depends on how these molecules are arranged and this differs among individuals. https://www.nature.com/scitable/topicpage/dna-is-a-structure-that-encodes-biological-6493050/ Clark, David P. (2019). Molecular Biology || Nucleic Acids and Proteins https://archive.org/details/molecularbiology00clar_0
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    Foldit

    Biology
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    1 Posts
    6 Views
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    What is a real number?

    Math
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    2 Posts
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    Axioms for the Real numbers The algebraic axioms a+b=b+a a·b=b·a (a+b)+c=a+(b+c) (a·b)·c=a·(b·c) a+0=a a·1=a ∀ a ∃ (−a) : a + (−a) = 0 ∀ a ≠ 0 ∃ aˉ¹ : a · aˉ¹ = 1 We can rewrite algebraic axioms as one mathematics statement: a · (b + c) = a · b + a · c The order axioms a > b , b > c ⇒ a > c a > b ⇒ ∀ c, a + c > b + c a > 0, b > 0 ⇒ a · b > 0
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    Climate Change Simulator

    Physics
    2
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    2 Posts
    13 Views
    A
    Try to describe solutions which you got.
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    How Far Radio Signals Traveled From Earth

    Physics
    1
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    1 Posts
    7 Views
    No one has replied
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    Astronomy

    Physics
    3
    0 Votes
    3 Posts
    16 Views
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    Try to post in English what do you see through telescopes right now.
Shoutbox
Learning English Broadcasts (use a limited vocabulary)

1 - 2025-02-26

2 - 2025-02-25

3 - 2025-02-24

Radio Voice of America
News in the USA and world
The Brooklyn Bridge: A Symbol of New York City

The U.S. Bullion Depository at Fort Knox Holds America’s Gold

Researchers: South Korea’s Birth Rate Increase Last Year Unclear

In 2024, the number of babies born in South Korea increased for the first time in nine years. The change is welcome news for a country that is dealing with serious population problems.