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Wu dahai
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Wu dahai
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设计、度假、生活  - 
 
 
Just three weeks until we announce the #CommunityImpact Awards on July 18! Stay tuned for more details and updates.
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Wu dahai
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纳米技术、自然探索、宇宙航天  - 
 
 
"It's dangerous to go alone! Take this"

ESA's Material and Electrical Components Laboratory was tasked with investigating a 'beta cloth' fibre for thermal blankets that could better withstand 'atomic oxygen' - a highly reactive form of #oxygen found at the top of the Earth's #atmosphere. It is particularly damaging to low-orbiting space missions, such as ESA's #Aeolus wind mapping mission.  
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Wu dahai
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纳米技术、自然探索、宇宙航天  - 
 
 
Fired up! Did you miss today's booster test for our Space Launch System, the world’s most powerful rocket? Watch it now!

During the SLS flight the boosters will provide more than 75 percent of the thrust needed to escape the gravitational pull of the Earth, the first step on our journey to Mars. More: http://www.nasa.gov/sls
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Wu dahai
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纳米技术、自然探索、宇宙航天  - 
 
 
Researchers discover new reverse chemical reaction at nanoscale that enables efficient carbon capture
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新闻资讯  - 
 
Chinese anger at Lady Gaga-Dalai Lama meeting - http://www.bbc.co.uk/news/world-asia-china-36641851
Chinese fans are reacting with outrage to Lady Gaga's meeting with the Dalai Lama over the weekend.
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Wu dahai
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青春激情,创业梦想  - 
 
 
Engineers create a soft motor that could power versatile soft robots
A small, squishy vehicle equipped with soft wheels rolls over rough terrain and runs under water.
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Wu dahai
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纳米技术、自然探索、宇宙航天  - 
 
 
Seeing Gravitational Waves With Atomic Clocks

Now that gravitational waves have been observed, the race is on to design better and more sensitive gravitational telescopes. The LIGO telescope measures gravitational waves by precisely measuring the distance between reflectors. As gravitational waves pass through LIGO the distance changes very slightly. One way to improve over LIGO is to create a more sensitive telescope in space following similar designs, such as the proposed eLISA mission. But there are other ideas that are also worth considering, such as designs using atomic clocks.

While atomic clocks can measure time very precisely, they can also measure the frequency of laser light very precisely. If two satellites containing atomic clocks were put into a common orbit, laser signals from each satellite could be measured by the atomic clock in the other. If a gravitational wave passed by, it would cause a small oscillation between the satellites, which could be seen an a periodic Doppler shift of the laser signals.

One advantage of such an experiment is that it could be tuned to gravitational waves of a particular frequency, rather than having a range of frequencies such as LIGO. Such a narrow band sensitivity would make it a poor detector of black hole mergers, but it could detect gravitational waves from periodic sources such as binary neutron stars. In a recent paper outlining the idea, the authors propose such atomic clocks could be included in an eventual eLISA mission.

Right now this is just an idea, but in the new world of gravitational wave astronomy, a lot of ideas could soon become reality.

Paper: S. Kolkowitz, et al. Gravitational wave detection with optical lattice atomic clocks. arXiv:1606.01859v1. (2016)

Atomic clocks could be used to observe gravitational waves in a new way.
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Wu dahai
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纳米技术、自然探索、宇宙航天  - 
 
 
CR7 is not alone—A team of super bright galaxies in the early universe
Astronomers have identified a family of incredible galaxies that could shed further light on the transformation of the early Universe known as the 'epoch of reionisation'. Dr David Sobral of Lancaster University will present their results on Monday 27 June at the National Astronomy Meeting in Nottingham.
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Wu dahai
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考古、历史、宗教、文学、教育  - 
 
Known as “Flagellum Dei,” or “scourge of God,” Attila the Hun was one of the most fearsome enemies the Romans ever faced.
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Wu dahai
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设计、度假、生活  - 
 
Google's SpotMini robot loads the dishwasher - http://www.bbc.co.uk/news/technology-36644047
A new dog-themed robot is shown loading a dishwasher with dirty glassware.
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Wu dahai
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纳米技术、自然探索、宇宙航天  - 
 
 
Cancer-causing virus mimics host signal to drive cell growth, protein production
As scientists identify ways that viruses exploit their host cells to make more copies of themselves, they are also uncovering clues to how these viral invaders can trigger cancerous cell growth.
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