Archive for the ‘physics’ category: Page 217

Oct 12, 2018

World’s fastest camera freezes time at 10 trillion frames per second

Posted by in categories: biological, physics

What happens when a new technology is so precise that it operates on a scale beyond our characterization capabilities? For example, the lasers used at INRS produce ultrashort pulses in the femtosecond range (10-15 s), which is far too short to visualize. Although some measurements are possible, nothing beats a clear image, says INRS professor and ultrafast imaging specialist Jinyang Liang. He and his colleagues, led by Caltech’s Lihong Wang, have developed what they call T-CUP: the world’s fastest camera, capable of capturing 10 trillion (1013) frames per second (Fig. 1). This new camera literally makes it possible to freeze time to see phenomena—and even light—in extremely slow motion.

In recent years, the junction between innovations in non-linear optics and imaging has opened the door for new and highly efficient methods for microscopic analysis of dynamic phenomena in biology and physics. But harnessing the potential of these methods requires a way to record in at a very short temporal resolution—in a single exposure.

Using current imaging techniques, measurements taken with must be repeated many times, which is appropriate for some types of inert samples, but impossible for other more fragile ones. For example, laser-engraved glass can tolerate only a single laser pulse, leaving less than a picosecond to capture the results. In such a case, the imaging technique must be able to capture the entire process in real time.

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Oct 11, 2018

Some Physicists Think Time May Be Slowing Down

Posted by in categories: physics, space

The universe is expanding at an ever-accelerating rate. At least, that’s what the vast majority of scientists would have you believe. But according to a team of Spanish physicists, it may not be the expansion of the universe that’s changing rate, but time itself. Time might be slowing down, and that means that it could eventually stop altogether.

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Oct 6, 2018

The Insane Physics of Airbags

Posted by in categories: physics, transportation

I can imagine the meeting: A dozen engineers are gathered around a conference table to discuss automobile safety. How can we protect people during a car crash? We have already added seat belts and crumple zones to cars. Is there anything else we can include? One attendee reluctantly raises their hand with a suggestion: “How about we add an explosive in the steering wheel?”

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Oct 6, 2018

Meghnad Saha the physicist also known for Planning Commission and providing national calendar

Posted by in categories: government, physics

New Delhi, Oct 6: There are many unsung and forgotten heroes that India has in abundance. One such man whose 125th birth anniversary falls today is Meghnad Saha who was not only nominated for the Nobel Prize in Physics more than once but was also elected to the first Lok Sabha in 1952 as an independent candidate defeating the Congress nominee Prabhu Dayal Himatsingka. But more interestingly he was the chairperson of Calender Reforms Committee set up in 1952.

No one can forget the role of Planning Commission of India in the growth trajectory of the country which was actually conceived by Subhash Chandra Bose at the Haripura Congress in 1938. Bose as a president proposed it as National Planning Committee in which Saha had shown very keen interest.

Also Read Denis Mukwege, Nadia Murad awarded 2018 Nobel Peace Prize.

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Oct 4, 2018

A new brain-inspired architecture could improve how computers handle data and advance AI

Posted by in categories: physics, robotics/AI

General interest.

IBM researchers are developing a new computer architecture, better equipped to handle increased data loads from artificial intelligence. Their designs draw on concepts from the human brain and significantly outperform conventional computers in comparative studies. They report on their recent findings in the Journal of Applied Physics.

Today’s computers are built on the von Neumann architecture, developed in the 1940s. Von Neumann computing systems feature a central processer that executes logic and arithmetic, a memory unit, storage, and input and output devices. Unlike the stovepipe components in conventional computers, the authors propose that brain-inspired computers could have coexisting processing and memory units.

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Oct 3, 2018

The Next Social Networks Could Be Brain-to-Brain

Posted by in categories: neuroscience, physics, space

It might already feel like social media is taking up too much of our mental space, but just wait until it’s literally inside of our brains.

Physicists and neuroscientists have developed the world’s first “brain-to-brain” network, using electroencephalograms (EEGs), which record electrical activity in the brain, and transcranial magnetic stimulation (TMS), which can transmit information into the brain, to allow people to communicate directly with each other’s brains — a new and thrilling (and a little terrifying?) example of science fiction brought to life.

Researchers at the University of Washington in Seattle announced last week that they successfully used their interface, which they call BrainNet, to have a small group of people play a collaborative “Tetris-like” game — with their minds.

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Oct 2, 2018

First woman Physics Nobel winner in 55 years

Posted by in category: physics

Only the third woman to win Nobel in Physics.

The 2018 Nobel Prize in Physics is awarded to a woman for only the third time since the award began.

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Oct 2, 2018

University of Michigan professor wins Nobel Prize in Physics

Posted by in category: physics

University of Michigan professor and Frenchman Gerard Mourou won a Nobel Prize in Physics on Tuesday for work with lasers. (Photo: Getty Images)

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Oct 2, 2018

Figuring out How Fast the Universe Is Expanding Might Require a New Type of Physics

Posted by in categories: physics, space

Two new studies contradict each other. Under our current model, they can’t both be right.

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Sep 27, 2018

Illuminating Science

Posted by in categories: biological, computing, physics, science

Illuminating mathematics, physics, biology and computer science research through public service journalism.

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