Friday, June 18

Science

Muscle cell secrets
Science

Muscle cell secrets

Muscle cell secretsA muscle fiber consists of just one cell, but many nuclei. A team at the MDC led by Professor Carmen Birchmeier has now shown just how varied these nuclei are. The study, which has been published in Nature Communications, can help us better understand muscle diseases such as Duchenne muscular dystrophy. Usually, each cell has exactly one nucleus. But the cells of our skeletal muscles are different: These long, fibrous cells have a comparatively large cytoplasm that contains hundreds of nuclei. But up to now, we have known very little about the extent to which the nuclei of a single muscle fiber differ from each other in terms of their gene activity, and what effect this has on the function of the muscle. A team led by Professor Carmen Birchmeier, head of the research gro...
DIY – How To Build Tower Bridge Aquarium From Magnetic Balls (Satisfying) | Magnet World Series #212
Science

DIY – How To Build Tower Bridge Aquarium From Magnetic Balls (Satisfying) | Magnet World Series #212

DIY - How To Build Tower Bridge Aquarium From Magnetic Balls (Satisfying) | Magnet World Series #212 DIY - How To Build Tower Bridge Aquarium From Magnetic Balls (Satisfying) | Magnet World Series #212 On the 15th we were under Covid social isolation - 19. Fortunately we have the magic Magnetic Balls, with them we can visit all the sights in the world. We take the idea from the Tower Bridge Aquadium in London, England. Do you recognize this bridge? Thank you for watching - please help us reach 10.000.000 first subscriptions ♥ SUBSCRIBE: https://bit.ly/2WBWUEY ♥ FACEBOOK: fb.com/Magnetballs Magnet World Creative Playlist : https://www.youtube.com/playlist?list=PLu4HYFOGFnpzMwHTdLmE3TbyEVIAlpVdT *** *** #MagneticBalls #MagnetCreative #Satisfying #M...
How Does Gravity Work?
Science

How Does Gravity Work?

How Does Gravity Work? How Does Gravity Work? Subscribe To Life's Biggest Questions: http://bit.ly/2evqECe Ever since the apple fell on Isaac Newton's head that fateful day, scientists have been working hard to understand the mysterious force that is gravity. Lucky for us, they've learned a great deal, and the knowledge is out there for all to see! But as with many such concepts, while most people have a grasp on it, rather few understand completely how it works. Let's remedy that. If you want more Science videos, check out our “Biggest Science Questions” playlist on the channel. Now get ready, it’s time to ask the question: How does Gravity Work? LATEST VIDEOS: BIGGEST WHAT IF's | LifesBiggestQuestions https://www.youtube.com/watch?v=J8EjxZEQxKc&list=PLx4NoY49Y...
Robots learn to get back up after a fall in an unfamiliar environment
Science

Robots learn to get back up after a fall in an unfamiliar environment

Robots learn to get back up after a fall in an unfamiliar environment By Karina Shah Robots can pick themselves up after a fall, even in an unfamiliar environment, thanks to an artificially intelligent controller that can adapt to new scenarios. It could make four-legged robots more useful in responding to natural disasters, such as earthquakes. Zhibin (Alex) Li at the University of Edinburgh, UK and his colleagues used an AI technique called deep reinforcement learning to teach four-legged robots a set of basic skills, such as trotting, steering and fall recovery. This involves the robots experimenting with different ways of moving and being rewarded with a numerical score for achieving a certain goal, such as standing up after a fall, and p...
Engineering magnetics — practical introduction to BH curve
Science

Engineering magnetics — practical introduction to BH curve

Engineering magnetics -- practical introduction to BH curve A practical introduction to understanding magnetic devices such as transformers and motors. This video covers BH curves, reluctance, permeability, DC and AC magnetic circuits, and some applications. CORRECTION: at 13:48, I say that permeability can be negative. This is not true. All permeabilities are positive. Diamagnetic materials have permeabilities that are lower than empty space (eg .95 relative permeability). There is another quantity which is called susceptibility, which describes the ratio between flux carried by a material, and the flux carried by the space which the material occupies. This quantity can be negative. Please put questions in the comments, and I'll do my best to answer them...