New research shows that sunspots and other active regions can change the overall solar emissions. The sunspots cause some emissions to dim and others to brighten; the timing of the changes also varies between different types of emissions. This knowledge will help astronomers characterize the conditions of stars, which has important implications for finding exoplanets around those stars.
An international research team led by Shin Toriumi at the Japan Aerospace Exploration Agency added up the different types of emissions observed by a fleet of satellites including “Hinode” and the “Solar Dynamics Observatory” to see what the Sun would look like if observed from far away as a single dot of light like other stars.
The team investigated how features like sunspots change the overall picture. They found that when a sunspot is near the middle of the side of the Sun facing us, it causes the total amount of visible
This article appeared in the November 2020 issue of Discover magazine as “Where the Wild Things Crow.” Subscribe for more stories like these.
If you’ve ever hit the beaches of Key West, Bermuda or Hawaii looking for a tranquil vacation, you may have experienced a rude awakening. By a rooster, that is.
These tourist-laden seaside towns are full of feral chickens. They roam the graveyards. They strut the beaches. They peck at leftovers beneath busy tables on restaurant patios. Legends about the birds abound, including that one flock arrived on the wings of a Pan Am jet and that some were bred to have extra toes. But are they good for anything besides waking us up?
Eben Gering thinks so. He’s been chasing free-roaming fowl around beaches across the globe for almost a decade. An assistant professor of biology at Nova Southeastern University in south Florida, Gering is convinced that
SINGAPORE: The Land Transport Authority (LTA) is studying whether data from the new on-board unit (OBU) in vehicles can be pushed to smartphones, allowing them to be used as an alternative display screen for electronic road pricing (ERP) information.
This is a “possible future upgrade” for the OBU, said Senior Minister of State for Transport Amy Khor in Parliament on Monday (Oct 5).
It was announced last month that installation of the OBU – replacing the current in-vehicle units (IU) – will start in the second half of 2021. These will be used when Singapore switches to the satellite-based next-generation ERP system in mid-2023.
Dr Khor said authorities are consulting workshops and authorised motor vehicle agents on how best to install the OBUs.
“For example, the OBU display unit can be installed in cars such that the blockage of the windscreen is very minimal, and can be folded
The latent reservoir is the last bastion of HIV’s resistance to a cure. But it is difficult to destroy because it is invisible: the cells in the reservoir harbor virus that is dormant, so they don’t have any viral proteins on their surface that would give them away.
As a result, scientists have struggled to learn what the reservoir looks like in individuals with HIV. And without this knowledge, they harbor little hope of being able to target the reservoir with therapies that could eliminate or reduce it, thus ridding people of HIV infection for good.
To fish out reservoir cells, scientists have to reawaken the virus by activating cells they collect from infected individuals. Once awake, the virus produces proteins that mark the surface of its host cells, which gives researchers a handle to find and study these cells. However, the very process of reactivating the virus leads to