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jcunha

NASA proposes a magnetic shield to protect Mars' atmosphere - 2 views

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    In the Planetary Science Vision 2050 Workshop a cool concept for a magnetic dipole sitting at Mars L1 with an estimated field of 1-2 Tesla was proposed to shield Mars from Solar Winds and provide an elementary magnetic shielding to Mars.
Marcus Maertens

Mars Mission May Use 'Poop Shield' to Block Cosmic Rays | News & Opinion | PCMag.com - 1 views

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    Quote: "It's a little queasy sounding, but there's no place for that material to go, and it makes great radiation shielding"
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    Judging by the color it probably contains a lot of melanin. ;-)
santecarloni

New Kind of Metal in the Earth | Geophysical Laboratory - 0 views

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    New experiments and supercomputer computations discovered that iron oxide undergoes a new kind of transition under deep Earth conditions. Iron oxide, FeO, is a component of the second most abundant mineral at Earth's lower mantle, ferropericlase. The finding, published in an upcoming issue of Physical Review Letters, could alter our understanding of deep Earth dynamics and the behavior of the protective magnetic field, which shields our planet from harmful cosmic rays.
santecarloni

Invisibility cloak gives sound performance - physicsworld.com - 2 views

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    "...scientists in Germany have built a device that can effectively make objects invisible to sound waves. The performance of the acoustic "invisibility cloak" exceeds that of existing electromagnetic devices and could open up new ways of manipulating waves, including the development of shields against seismic waves."
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    shit.... they are a few months ahead of us it seems ... :-( what is the impact on our ariadna??
dejanpetkow

[1202.5708] The Alcubierre Warp Drive: On the Matter of Matter - 1 views

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    News about the warp drive based on the original Alcubierre metric but with modified shape function. Focus of the reserach was on the interaction between warp bubble and cosmic particles. Result: People on board need shielding. People at the journey's destination might get roasted (by Gamma rays if you want to know).
Isabelle Dicaire

Nature's designs inspire research into new light-based technologies - 2 views

shared by Isabelle Dicaire on 19 Sep 14 - No Cached
LeopoldS liked it
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    Several recent papers on biomimetics and photonics, including works on structural colours, radiation shielding, spiders and more.
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    including one for Tom: Structural color and its interaction with other color-producing elements: perspectives from spiders Bor-Kai Hsiung ; Todd A. Blackledge ; Matthew D. Shawkey [+] Author Affiliations Proc. SPIE 9187, The Nature of Light: Light in Nature V, 91870B (September 8, 2014); doi:10.1117/12.2060831
Juxi Leitner

Lotus Plant-Inspired Dust-Busting Shield To Protect Space Gear - 3 views

  • replicate to prevent dirt from accumulating on the surfaces of spacesuits, scientific instruments, robotic rovers, solar array panels and other hardware used to gather scientific data or carry out exploratory activities on other objects in the solar system
  • The team also is trying to partner with Northrop Grumman to add a biocide to the coating, which would kill bacteria that thrive and produce foul odors wherever people are confined to a small space for long periods, like the space station.
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    We had some discussion about the Lotus-effect roughly two years ago. Zoe said that NASA surely worked on it. Well, she was right.
Luís F. Simões

heat shields: NASA's Orion capsule vs. SpaceX's Dragon capsule - 0 views

  • NASA has 50 years of experience with reentry capsules, but is fearful of trying something new. SpaceX has no reentry experience and chooses the most efficient engineering approach. Guess whose capsule is overweight and still sitting on the ground? Guess whose capsule completed a successful first flight yesterday?
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    Powerful contrast between the two pictures!!
pacome delva

Invisibility cloaks shield the large and visible - physicsworld.com - 1 views

  • Two independent groups of physicists have built invisibility cloaks that can shield large objects lying on a plane. These "carpet cloaks" are far closer to the intuitive idea of an invisibility cloak than devices previously built, they argue, because they hide objects that can be seen with the naked eye and do so at visible wavelengths. The cloaks are also relatively cheap and easy to make, being constructed from the natural material calcite.
  • The team used a technique known as transformation optics to design their cloak.
  • Tomas Tyc of Masaryk University in the Czech Republic, who was not a member of either group, thinks that the papers "describe important achievements in the area of experimental cloaking." But he maintains that a carpet cloak is quite different to a fully fledged Harry Potter-style invisibility cloak. He points out that a carpet cloak only really works when viewing an object – be it a rucksack or a sword on someone's back, for example – side on. Otherwise the object will appear flat but still be visible.
Luís F. Simões

Lockheed Martin buys first D-Wave quantum computing system - 1 views

  • D-Wave develops computing systems that leverage the physics of quantum mechanics in order to address problems that are hard for traditional methods to solve in a cost-effective amount of time. Examples of such problems include software verification and validation, financial risk analysis, affinity mapping and sentiment analysis, object recognition in images, medical imaging classification, compressed sensing and bioinformatics.
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    According to the company's wikipedia page, the computer costs $ 10 million. Can we then declare Quantum Computing has officially arrived?! quotes from elsewhere in the site: "first commercial quantum computing system on the market"; "our current superconducting 128-qubit processor chip is housed inside a cryogenics system within a 10 square meter shielded room" Link to the company's scientific publications. Interestingly, this company seems to have been running a BOINC project, AQUA@home, to "predict the performance of superconducting adiabatic quantum computers on a variety of hard problems arising in fields ranging from materials science to machine learning. AQUA@home uses Internet-connected computers to help design and analyze quantum computing algorithms, using Quantum Monte Carlo techniques". List of papers coming out of it.
pacome delva

A Physics Paradox: Holes That Block Light -- Fox 2009 (1113): 3 -- ScienceNOW - 0 views

  • Make holes in a film of gold so thin that it's already semitransparent, and less light gets through.
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    A good example of "Can we use it for space.com"... For shielding of course !
Dario Izzo

Space4Life - Lab2Moon - 3 views

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    Cyano bacteria to shield from radiation. An idea from italians flying to the Moon via Team Indus
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    Nice idea, but is it really new: resistance of cyanob. to UV radiation has been known but studies have been inconclusive as to under what resource limitations it works, but according to what we see from evolution: on Earth it works, since they survived pre-ozone atmosphere! some papers from a quick google search: 1999 http://www.tandfonline.com/doi/pdf/10.1080/09670269910001736392 2014 https://www.ncbi.nlm.nih.gov/pubmed/25463663
Thijs Versloot

Minimagnetospheres - towards magnetic deflector shields - 1 views

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    The study gave insight that already weak magnetic fields can deflect energetic particles due to charge separation and the formation of strong electric fields
Luís F. Simões

Zeitgeist 2012 - Google - 2 views

  • 1.2 trillion searches. 146 languages. What did the world search for in 2012?
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    this is a gold mine :D Portugal, a bankrupt country in crisis where the Most Searched How to... is "Como emagrecer" (how to lose weight?). Netherlands, where the Most Searched How to... is "Hoe overleef ik" (how do I survive?) UK where the most Trending What is... is "What is love?" and Italians... please explain how come the top Trending How to... are 1. Come fare Sesso 2. Come fare un Clistere !?!? Respect for Austria though, where the top trending What is... are: 1. Was ist ACTA 2. Was ist SOPA any other interesting finds?
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    From Ghana "What is...?": What is a Constitution What is Government [edit] Some top Science searches in the US: Hemorrhoid, Pregnancy Syndroms. Any potential for Ariadna? [edit] ... and finally, for the sake of my shield, top search from Poland in the Music category
Lionel Jacques

Nissan announces world's first self-healing iPhone case - 1 views

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    Just over six years ago, we reported that Nissan had developed a "Scratch Guard Coat" paint designed to repair scratches on not only cars, but on painted surfaces in general. ... The Scratch Shield paint is made from polyrotaxane, which has a chemical structure that is able to react and change back to its original shape and fill the gap that results from a fine scratch.
Thijs Versloot

Fission powered pulsed Z-pinch fusion propulsion concept - 1 views

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    Pulsed device providing an Isp=20.000 with thrust of 40kN. There is an onboard fission reactor including shielding. Roundtrip to Mars in 30 days requires 350Mt of propellant, equivalent to delta_v=93200m/s
Joris _

ATK Proposes Satellite To Fight Space Debris | SpaceNews.com - 0 views

  • The goal is to turn large debris particles that pose a threat to spacecraft into much smaller pieces that can be deflected by exterior shielding.
Joris _

Obama's dream of Mars at risk from radiation - physicsworld.com - 0 views

  • Schwabe cycle
  • Schwabe cycle, where sunspot numbers reach a peak roughly once every 11 years
  • the intensity of each solar maximum is also thought to oscillate over a period, called the Gleissberg cycle
  • ...3 more annotations...
  • The worse-case scenario is that if you radiate a crew sufficiently, they'd all succumb to radiation sickness within a few days and essentially vomit and diarrhoea themselves to death within an enclosed capsule
  • The Moon missions were just blind lucky,” explains Lewis Dartnell, an astrobiologist at University College, London. “The astronauts would have experienced radiation sickness and a higher risk of future cancer if they'd been hit,” he adds.
  • Hapgood and colleagues are currently working on an alternative technique that involves surrounding the spacecraft with a plasma shield to deflect incoming protons without creating secondary radiation
LeopoldS

Roman ingots to shield particle detector : Nature News - 1 views

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    nice story from Andrés: my only concern: "At Gran Sasso, the ingots will be melted into a 3-centimetre-thick lead lining that will surround the cubic CUORE detector. Before the ingots are melted down, the inscriptions on each one will be removed and sent back to Cagliari for preservation. "They are trademarks, bearing the names of various firms that extracted and traded lead," explains Donatella Salvi, an archaeologist at the Cagliari museum.
santecarloni

Synthesis and characterization of a nanocrystalline diamond aerogel - 2 views

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    "we report the high-pressure, high-temperature synthesis of a diamond aerogel from an amorphous carbon aerogel precursor using a laser-heated diamond anvil cell"
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    so what ...?
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    Depending on its properties it might be interesting as an ablative heat shield material.
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