commit 1c2e43628497135bbcc2f635ba00744928851b33 Author: dm1sh Date: Sat Nov 11 03:45:57 2023 +0300 Added files diff --git a/Antenna_connection.md b/Antenna_connection.md new file mode 100644 index 0000000..7dd5c56 --- /dev/null +++ b/Antenna_connection.md @@ -0,0 +1,4 @@ +# Antenna connection +Directly attachment is not an option if we need to do a long distance transmission. +Double-wire or coaxial. Wave resistance either square root of inductivity divided by conductivity. +Or thickness, distance and dielectric permittivity. 30 to 600 ohm. \ No newline at end of file diff --git a/Cellular_automata/Cellular automata English.pdf b/Cellular_automata/Cellular automata English.pdf new file mode 100644 index 0000000..a2c6984 Binary files /dev/null and b/Cellular_automata/Cellular automata English.pdf differ diff --git a/Cellular_automata/README.md b/Cellular_automata/README.md new file mode 100644 index 0000000..2c09423 --- /dev/null +++ b/Cellular_automata/README.md @@ -0,0 +1,51 @@ +## Cellular automata (CA) and their application Produced by a “LETI” studentDmitriy Shishkov gr. 1181 + + +![](media/cellular-automata-ca-and-their-application-0.gif) +![](media/cellular-automata-ca-and-their-application-produced-by-a-leti-studentdmitriy-shishkov-gr-1181-1.png) + +## Conway’s game of life + + +![](media/conways-game-of-life-0.gif) + +## Elementary cellular automaton + + +![](media/elementary-cellular-automaton-0.gif) + +## Rule 30 + + +![](media/rule-30-0.png) +![](media/rule-30-1.png) +![](media/rule-30-2.png) + +## Pseudo-fractal generationRule 22 + + +![](media/pseudo-fractal-generation-0.png) +![](media/pseudo-fractal-generationrule-22-1.png) + +## Rule 110Turing complete + + +![](media/rule-110-0.png) +![](media/rule-110-1.png) + +## Rule 184 + + +![](media/rule-184-0.png) +![](media/rule-184-1.png) + +## + + +![](media/slide-7-image-0.png) + +## Thanks for your attentionProduced by a “LETI” studentDmitriy Shishkov gr. 1181 + + +![](media/thanks-for-your-attention-0.png) +![](media/thanks-for-your-attention-1.png) diff --git a/Cellular_automata/media/cellular-automata-ca-and-their-application-0.gif b/Cellular_automata/media/cellular-automata-ca-and-their-application-0.gif new file mode 100644 index 0000000..aa50237 Binary files /dev/null and b/Cellular_automata/media/cellular-automata-ca-and-their-application-0.gif differ diff --git 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+Strong: separate images or Einstein rings, weak: small distorsions, microlensing: brightness or size shifts, caused buy planets or small stars + +Einstein predicted in 1930 + +celestial body + +Spacetime curving + +Galaxy clusters + +Distorts and magnifies the light + +giant magnifying glass + +Doppler effect \ No newline at end of file diff --git a/Microphones.md b/Microphones.md new file mode 100644 index 0000000..ba7eb13 --- /dev/null +++ b/Microphones.md @@ -0,0 +1,13 @@ +# Microphones + +Edison carbon microphone, western electronics condenser microphone, coil and then ribbon microphone. Coil — electric resistance changes in carbon in the gap between electrodes. Condenser — capacity changes. Dynamic — electromagnetic induction, coil oscillations. Ribbon - light-weighted metallic ribbon, bidirectional. + +Directions — locus: omnidirectional, cardioid, bi-directional, short-gun. + +Connection: jack (1/4), xlr, 3.5 jack + +1) What is the first type of microphone? Carbon + +2) What shape does condenser microphone have? Bidirectional + +3) how many channels can be transmited over xlr connector? Two \ No newline at end of file diff --git a/On_rheology_of_cats.pdf b/On_rheology_of_cats.pdf new file mode 100644 index 0000000..1e81db6 Binary files /dev/null and b/On_rheology_of_cats.pdf differ diff --git a/README.md b/README.md new file mode 100644 index 0000000..03b5f88 --- /dev/null +++ b/README.md @@ -0,0 +1,27 @@ +# English lessons presentations + +First semester: + +- On rheology of cats: [Letter](./On_rheology_of_cats.pdf) + +Second semester: + +... + +Third semester: + +- [Gravitational lensing](./Gravitational_lensing.md) + +- Methods of dark matter searching + +- [Microphones](./Microphones.md) + +- [Thermonuclear fusion](./Thermonuclear_fusion.md) + +Fourth semester: + +- [Radar and sonar](./Radar_and_sonar.md) + +- [Antenna connection](./Antenna_connection.md) + +- [Callural automata](./Cellular_automata) \ No newline at end of file diff --git a/Radar_and_sonar.md b/Radar_and_sonar.md new file mode 100644 index 0000000..819d578 --- /dev/null +++ b/Radar_and_sonar.md @@ -0,0 +1,49 @@ +# Radar and sonar + +- What is the main difference between active and passive sonar? + +a) Active sonar uses lower frequencies than passive sonar + +b) Passive sonar emits no energy while active sonar does + +c) Passive sonar has a maximum operating range of 10 to 100 kilometers while active sonar can detect objects at longer ranges + +d) Active sonar listens to underwater sounds, while passive sonar transmits sound pulses. + +Answer: b) Passive sonar emits no energy while active sonar does. + +- 2. What is the main challenge facing radar systems? + +a) The ability to accurately determine an object's direction + +b) The conflict between the ability to detect objects at a long range and the ability to accurately determine an object's distance + +c) The noise level of the radio receiver + +d) The difficulty in selecting and generating different pulse shapes and lengths. + +Answer: b) The conflict between the ability to detect objects at a long range and the ability to accurately determine an object's distance. + +- 3. What is the advantage of using lower frequencies in passive sonar? + +a) They propagate through the water with less absorption + +b) They allow for better distance determination without reducing the operating range + +c) They increase the range without degrading the distance determination + +d) They enable the rapid selection and generation of different pulse shapes and lengths. + +Answer: a) They propagate through the water with less absorption. + +- 4. What is the main advantage of using DSP in radar systems? + +a) To increase the operating range of the radar system + +b) To accurately determine an object's direction + +c) To provide better distance determination without reducing the operating range + +d) To decrease the noise level of the radio receiver. + +Answer: c) To provide better distance determination without reducing the operating range. \ No newline at end of file diff --git a/Thermonuclear_fusion.md b/Thermonuclear_fusion.md new file mode 100644 index 0000000..f56ff4a --- /dev/null +++ b/Thermonuclear_fusion.md @@ -0,0 +1,25 @@ +# Thermonuclear fusion + +- Where is nuclear energy used? + +Electricity generation, icebreakers, submarines + +- What elements are used as a fuel in nuclear fushion? + +uranium-235, Uranium-233 or plutonium-239 + +- How to control chain reaction? + +Using control rods or water + +- Why termonuclear fusion is better for ecology? + +It produces less radiation and nuclear waste + +- What is the heaviest atom that is useful for TF? + +Ferrum + +- How ITER is expands? + +International Thermonuclear Experimental Reactor \ No newline at end of file