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Nov 28, 2022

Higher speeds in free-space optical communications in the midinfrared band

Posted by in categories: energy, engineering, internet

Telecommunications have reshaped many aspects of our lives over the past few decades by providing incredibly convenient ways to share and access information. One of the most important enablers for this transformation has been the adoption and improvement of broadband technologies, which cram enormous amounts of data over wide frequency bands to achieve unprecedented transfer speeds. Today, most large cities have fiber optics-based networks that distribute high-speed internet directly to every home.

Unfortunately, it is not always feasible to deploy fiber optic links to and , due to the associated costs and civil engineering work required. Such places could benefit from a different approach to optical broadband communications: free-space optics. The main idea in free-space optical (FSO) communications is to set up aligned transmitter–receiver pairs where needed and use air as the medium to carry the signals.

While there are still many challenges to address in FSO systems (such as low energy efficiency, impact of weather, and high background noise), scientists worldwide are continuously trying out new ways of solving these issues and achieving higher data rates.

Nov 28, 2022

Wrinkles left over from the Big Bang may have magnetized the universe

Posted by in category: cosmology

Researchers have proposed what’s perhaps the most exotic explanation to date for the source of the universe’s seed magnetic field: cosmic strings.

Nov 28, 2022

You can explore the entire observable universe, thanks to a new interactive map

Posted by in category: cosmology

Start at the Big Bang…


“The map of the observable Universe” takes viewers on a 13.7-billion-year-old tour of the cosmos from the present to the moments after the Big Bang.

Nov 28, 2022

Transfer RNA

Posted by in category: futurism

This Video Explains Transfer RNA.

Thank You For Watching.

Continue reading “Transfer RNA” »

Nov 28, 2022

The Friedmann equations, and how they are related to protests in China

Posted by in categories: biotech/medical, government, information science

NEW DELHI: Among all the protests that have erupted across China following the strict quarantine measures enforced by the government for Covid-19, one form that has stood out is the display of a physics equation.

In images widely being circulated on social media, students of Beijing’s Tsinghua University can be seen holding sheets on which is written one of the Friedmann equations.

What these equations have to do with the subject of the protests is open to speculation. Many on social media have suggested that it is a play on the words “free man”. Another view is that it symbolises a free and “open” China, because the Friedmann equations describe an “open” (expanding) universe.

Nov 28, 2022

Unique Features of Octopus Create an Entirely New Way of Designing a Nervous System

Posted by in category: neuroscience

Summary: Researchers discovered a structure within the octopus nervous system by which the intramuscular nerve cords, which help the cephalopod to sense its arm movements, connect arms on the opposite side of the animal.

Source: University of Chicago.

Octopuses are not much like humans — they are invertebrates with eight arms, and more closely related to clams and snails. Still, they have evolved complex nervous systems with as many neurons as in the brains of dogs, and are capable of a wide array of complicated behaviors.

Nov 28, 2022

Amazon has a new drone for 30-minute urban deliveries

Posted by in category: drones

As Amazon prepares to debut its long-delayed Prime Air drone delivery service, it’s also showing off a smaller, quieter drone that will be ready in 2024 and could be making regular deliveries in major cities by the end of the decade.

Why it matters: Consumers want their stuff fast, and under Amazon founder Jeff Bezos’ vision, they could get it delivered in as little as 30 minutes while helping the environment by taking CO2-emitting trucks off the street.

Nov 28, 2022

Wow! Artemis 1 Orion spacecraft captures live view of Earth and moon from deep space (video)

Posted by in category: space travel

There’s an epic livestream running on the Artemis 1 moon mission, showcasing live views of the Orion spacecraft as it flies in a distant retrograde lunar orbit.

Nov 28, 2022

Novel method automates the growth of brain tissue organoids on a chip

Posted by in categories: biotech/medical, internet, robotics/AI

A team of engineers at UC Santa Cruz has developed a new method for remote automation of the growth of cerebral organoids—miniature, three-dimensional models of brain tissue grown from stem cells. Cerebral organoids allow researchers to study and engineer key functions of the human brain with a level of accuracy not possible with other models. This has implications for understanding brain development and the effects of pharmaceutical drugs for treating cancer or other diseases.

In a new study published in the journal Scientific Reports, researchers from the UCSC Braingeneers group detail their automated, internet-connected microfluidics system, called “Autoculture.” The system precisely delivers feeding liquid to individual in order to optimize their growth without the need for human interference with the .

Cerebral organoids require a high level of expertise and consistency to maintain the precise conditions for cell growth over weeks or months. Using an , as demonstrated in this study, can eliminate disturbance to cell culture growth caused by human interference or error, provide more robust results, and allow more scientists access to opportunities to conduct research with human brain models.

Nov 28, 2022

CRISPR is so popular even viruses may use it

Posted by in category: biotech/medical

Thousands of viruses appear to have stolen the gene-cutting mechanism from bacteria.