Paris-based satellite company Eutelsat is investigating "unidentified interference" with its satellite broadcast services that temporarily knocked out several television and radio stations. The company declined to say whether it thought the interference was accidental or deliberate.
The problem began Tuesday afternoon, blocking several European, Middle East and northeast African radio and television stations, as well as Agence France-Presse's news service. All transferred their satellite transmissions to another frequency to resume operations.
Science & Technology
UK researchers from University College London (UCL), along with colleagues from Boston University, have found that the hotter than expected temperature of Saturn's upper atmosphere -- and that of the other giant planets -- is not due to the same mechanism that heats the atmosphere around the Earth's Northern Lights. Reporting in Nature (25th January) the researchers findings thus rule out a long held theory.
A simple calculation to give the expected temperature of a planet's upper atmosphere balances the amount of sunlight absorbed by the energy lost to the lower atmosphere. But the calculated values don't tally with the actual observations of the Gas Giants: they are consistently much hotter.
It has long been thought that the culprit behind the heating process was the ionosphere, being driven by the planet's magnetic field, or magnetosphere. By using numerical models of Saturn's atmosphere the researchers found that the net effects of the winds driven by polar energy inputs is not to heat the atmosphere but to actually cool it.
A simple calculation to give the expected temperature of a planet's upper atmosphere balances the amount of sunlight absorbed by the energy lost to the lower atmosphere. But the calculated values don't tally with the actual observations of the Gas Giants: they are consistently much hotter.
It has long been thought that the culprit behind the heating process was the ionosphere, being driven by the planet's magnetic field, or magnetosphere. By using numerical models of Saturn's atmosphere the researchers found that the net effects of the winds driven by polar energy inputs is not to heat the atmosphere but to actually cool it.
The origins and earliest branches of primate evolution are clearer and more ancient by 10 million years than previous studies estimated, according to a study featured on the cover of the Jan. 23 print edition of the Proceedings of the National Academy of Sciences.
Humans continued to evolve significantly long after they were established in Europe, and interbred with Neandertals as they settled across the continent, according to new research published this week in the Proceedings of the National Academy of Sciences (PNAS) USA.
Beijing-- NASA astronaut Edward Lu believes America's space agency should design and build a small space tractor that would snuggle up to a planet-threatening astroid and give it a gravitational nudge to change its path to avoid a collision with Earth.
Lu told an audience at the University of Hawaii-Manoa Monday evening the 200 million U.S. dollar to 300 million dollar spacecraft would exert enough gravitational pull to alter an astroid's orbit.
"We're only trying to get a really tiny change in the velocity of the asteroid to prevent an impact," said Lu, a former University of Hawaii solar physicist.
Lu told an audience at the University of Hawaii-Manoa Monday evening the 200 million U.S. dollar to 300 million dollar spacecraft would exert enough gravitational pull to alter an astroid's orbit.
"We're only trying to get a really tiny change in the velocity of the asteroid to prevent an impact," said Lu, a former University of Hawaii solar physicist.
Beijing -- A non-lethal ray gun, useful in particular encounter by servicemen, is the new weapon developed by the U.S. military, media reports said Thursday.
The new weapon had its first media demonstration Wednesday.
The new weapon had its first media demonstration Wednesday.
THE US Defence Department today unveiled what it called a revolutionary heat-beaming weapon that could be used to control mobs or repel foes in conflicts like Iraq and Afghanistan.
The so-called Active Denial System creates an intense burning sensation causing people to run for cover, but no lasting harm, officials said.
The so-called Active Denial System creates an intense burning sensation causing people to run for cover, but no lasting harm, officials said.
A Washington University physicist, it was reported last week, is in the process of making potentially revolutionary discoveries about the shape of the universe.
By measuring gravitational forces as tiny as the weight of a bit of grain salt cut into 60 billion pieces, Ramanath Cowsik hopes to unlock what a colleague has said could "change our understanding of how everything in the universe works."
By measuring gravitational forces as tiny as the weight of a bit of grain salt cut into 60 billion pieces, Ramanath Cowsik hopes to unlock what a colleague has said could "change our understanding of how everything in the universe works."
The US military has given the first public display of what it says is a revolutionary heat-ray weapon to repel enemies or disperse hostile crowds.
The weapon - called the Active Denial System - projects an invisible high energy beam that produces a sudden burning feeling, but is harmless.
Military officials believe the gun could be used as a non-lethal way of making enemies surrender their weapons.
The weapon - called the Active Denial System - projects an invisible high energy beam that produces a sudden burning feeling, but is harmless.
Military officials believe the gun could be used as a non-lethal way of making enemies surrender their weapons.
The US military has given the first public display of what it says is a revolutionary heat-ray weapon to repel enemies or disperse hostile crowds.
The gun - called Silent Guardian - projects an invisible high energy beam that produces a sudden burning feeling, but is actually harmless.
The beam can be fired as far as 500m (550 yards), much further than existing non-lethal weapons like rubber bullets.
The gun should be in use by the US military within three years.
The gun - called Silent Guardian - projects an invisible high energy beam that produces a sudden burning feeling, but is actually harmless.
The beam can be fired as far as 500m (550 yards), much further than existing non-lethal weapons like rubber bullets.
The gun should be in use by the US military within three years.
Comment: Might be handy for Texans 'herding cattle' too. Good job its "harmless", one wouldn't want to damage the livestock.
Comment: Weapons like these are being built to be used against dissidents at home. You can take that to the bank.