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Circa 2007
When intense positron bursts are implanted into a thin film of porous silica, di-positronium (Ps2) is created on the internal pore surfaces, providing experimental proof of the existence of the molecule. Using a more intense positron source, it may be possible to form a Bose–Einstein condensate of Psf2 molecules, which would be of significant fundamental interest and a milestone on the path to produce an annihilation gamma-ray laser.
This was the voyage of the RSS First Step today. Its mission: encounter Earth from incredible views at apogee.
The term, “casualty risk” doesn’t literally mean humans will be smashed by falling satellites, but there is an increasing risk of satellite collisions, which could hinder or even spell disaster for future orbital missions. And, satellites de-orbited without control could pose a danger to property or the well-being of some on the surface.
In other words, it’s time to rethink the way we dispose of satellites.
Full Story:
What goes up, must come down.
Or at least, for satellites, it should.
Exclusive: UK scientist says giving booster jabs rather than sharing doses equitably will cause hundreds of thousands of avoidable deaths.
The U.S. Preventive Services Task Force’s proposed changes to recommendations for using low-dose aspirin to prevent a first heart attack or stroke closely align with guidelines from the American College of Cardiology and the American Heart Association.
In a paper published in Scientific Reports, academics at the University of Surrey have discovered that biological cells generate an electric field voltage that appears outside and not just within, meaning each cell acts as a tiny electrode. Since this voltage impacts how cells interact with their environment, including the way cells stick to one another, this has significant potential implications for future medical treatments.
Since the 1790s, scientists have known that electricity plays a role in the function of life, with the discovery in the 1940s that every cell contains a voltage that controls many of its functions. This is particularly the case in muscle and nerve cells but has also been shown to play an important role in diseases such as cancer.
However, until now, this voltage has always been understood to be contained within the cell. Through intricate experiments with red blood cells, the Surrey-led research team has shown that the voltage appears outside the cell as well. This means that cells effectively act as tiny transmitters, electrically changing the environment around them. Similar results in other types of biological cells could play a significant role in determining new types of medical treatment.
Imperial researchers have found that variability between brain cells might speed up learning and improve the performance of the brain and future artificial intelligence (AI).
The new study found that by tweaking the electrical properties of individual cells in simulations of brain networks, the networks learned faster than simulations with identical cells.
They also found that the networks needed fewer of the tweaked cells to get the same results and that the method is less energy-intensive than models with identical cells.
Full Story:
The research is published in Nature Communications.
Why is a neuron like a snowflake?
