Friis formula or Friis's formula (sometimes Friis' formula), named after Danish-American electrical engineer Harald T. Friis, is either of two formulas used in telecommunications engineering to calculate the signal-to-noise ratio of a multistage amplifier. One relates to noise factor while the other relates to noise temperature. (Wikipedia).
What is Sound? - Quickly Discover What Sound Really Is
What is Sound? This simple demonstration visually shows how sound waves are produced from a vibrating surface. A frequency generator is hooked up to a power amplifier, and the resultant signal is used to drive a loudspeaker. The signal is also sent to an oscilloscope. After listen
From playlist Physics Demonstrations
Sound vs. Noise: What’s the Actual Difference? (Part 1 of 3)
Noise and sound are not the same thing… really, they aren’t! What exactly is noise? Part 2 of 3 - https://youtu.be/XhFhK97hrdY Part 3 of 3 - https://youtu.be/yTyYZFcxGGQ Read More: Signal-to-Noise Ratio and Why It Matters https://www.lifewire.com/signal-to-noise-ratio-3134701 “You
From playlist Seeker Plus
Physics - Mechanics: Sound and Sound Waves (36 of 47) Intensity of Sound Wave 2
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you how to calculate the intensity of sound wave 2.
From playlist PHYSICS MECHANICS 5: WAVES, SOUND
In this video i demonstrate sound waves interference and standing waves from loudspeaker used sound sensor. The frequency on loudspeaker is about 5500Hz. Enjoy!!!
From playlist WAVES
Physics - Mechanics: Sound and Sound Waves (33 of 47) Maximum Pressure in a Sound Wave
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you how to calculate the maximum pressure in a sound wave.
From playlist PHYSICS MECHANICS 5: WAVES, SOUND
Speakers: Tobias Gruetzmacher, Marcel Klein, Mario Manno Introduction and hacking The Nintendo DS is a mobile gaming console. It was first introduced in 2004. Our talk will give a short introduction of the hardware and available games. The main focus however lies on homebrew software,
From playlist 23C3: Who can you trust
Physics - Mechanics: Sound and Sound Waves (38 of 47) Finding the Maximum Pressure Difference
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you how to calculate the maximum pressure difference of sound waves.
From playlist PHYSICS MECHANICS 5: WAVES, SOUND
Physics - Mechanics: Sound and Sound Waves (34 of 47) Maximum Displacement in a Sound Wave
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you how to calculate the maximum displacement in a sound wave.
From playlist PHYSICS MECHANICS 5: WAVES, SOUND
p-groups - 5 by Heiko Dietrich
DATE & TIME 05 November 2016 to 14 November 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Computational techniques are of great help in dealing with substantial, otherwise intractable examples, possibly leading to further structural insights and the detection of patterns in many abstra
From playlist Group Theory and Computational Methods
Laurent Viennot: Compact representation of distances in a graph: a tour around 2-hop labelings
HYBRID EVENT Recorded during the meeting "Metric Graph Theory and Related Topics " the December 09, 2021 by the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Guillaume Hennenfent Find this video and other talks given by worldwide mathematicians on CIRM
From playlist Mathematical Aspects of Computer Science
HAR 2009: Lightning talks Friday 5/14
Clip 5 Speakers: Don Hopkins, Hoppel, jbe, Melvin Rook, Rene "cavac" Schickbauer, Sébastien Bourdeauducq, tille 7 short lectures in 2 hours This session of lightningtalks includes: •Free Beer https://har2009.org/program/track/Lightningtalks/177.en.html •BlinkenSisters Jump'n'
From playlist Hacking at Random (HAR) 2009
Andrei Linde - Will the Universe Ever End?
What does it mean to ask about the end of the universe? Can the universe even have an end? What would end? In the far, far future, what happens to stars, galaxies, and black holes? What about mass and energy, even space and time? What's the 'Big Crunch' and the 'Big Rip'? And what if there
From playlist Closer To Truth - Andrei Linde Interviews
Thierry COQUAND - Logic and topology
The logic of topos is naturally described using intuitionistic higher-order logic, an intuitionistic version of a simple theory of types, a formal system designed by A. Church (1940). Two important axioms of this formal system are the axiom of extensionality and the axiom of description. R
From playlist Topos à l'IHES
Andrei Linde - What Does A Fine-Tuned Universe Mean?
That the universe is 'fine-tuned' is generally not controversial—the laws of physics have to be 'just so' for anything we know, including ourselves, to exist. But why this is so and what this may mean is highly controversial. Coincidence and wildly good fortune? Multiple universes with ant
From playlist Closer To Truth - Andrei Linde Interviews
Andrei Linde - What Are the Implications of Cosmology?
Cosmologists are making startling discoveries, with real data enabling deep theories about the beginning and end of our universe and informed speculations about various kinds of astonishing multiple universes. Can more be inferred here than the science itself? Can we discern 'purpose' or '
From playlist Closer To Truth - Andrei Linde Interviews
Andrei Linde & Renata Kallosh - Why is Quantum Gravity Key?
Quantum theory explains the microworld. General relativity, discovered by Einstein, explains gravity and the structure of the universe. The problem is that the two are not friends; they do not get along, they are not compatible. But they must. That's the task of quantum gravity. Free acc
From playlist Closer To Truth - Andrei Linde Interviews
Physics - Mechanics: Sound and Sound Waves (37 of 47) Finding the Maximum Displacement
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you how to calculate the maximum displacement of sound waves.
From playlist PHYSICS MECHANICS 5: WAVES, SOUND