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Tom Gheysens

Vitamin B3 might have been made in space, delivered to Earth by meteorites -- ScienceDaily - 0 views

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    Ancient Earth might have had an extraterrestrial supply of vitamin B3 delivered by carbon-rich meteorites, according to a new analysis. The result supports a theory that the origin of life may have been assisted by a supply of key molecules created in space and brought to Earth by comet and meteor impacts.
jcunha

NASA challenges designers to construct habitat for deep space exploration - 3 views

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    NASA is setting a $2.25 million competition to design and build a 3-D printed habitat for deep space exploration - new task for the future architect of the team?
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    I kind of like Thijs's space mirror ablation method as a way of printing :))
Nina Nadine Ridder

Testing shows using microwaves to propel a craft into space might work - 4 views

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    A team of researchers at Colorado based Escape Dynamics is reporting that initial tests indicate that it might really be possible to launch space-planes into space using microwaves sent from the ground, to allow for a single stage spacecraft. If the idea pans out, the cost savings for sending satellites (or perhaps humans) into orbit could be considerable.
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    Not very new, but a very slick video nonetheless! Will it work? I am not so sure whether "just engineering" applies in this case. The array of antenna's required is quite significant to compensate for beam losses. Wall plug efficiency is not that high therefore, then again.. solar energy is for free almost in the future so who cares.. let's go for it! :)
jcunha

Chemical analysis in Earth and Space via Raman Spectroscopy - 2 views

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    "A new lightweight, energy-efficient tool for analyzing a material's chemical makeup could improve the detection abilities of various technologies, ranging from bomb-detecting drones to space rovers searching for signs of life". Raman Spectroscopy is about measuring vibrational modes in molecules. This vibrational modes are in the meV typically, turning Raman Spectroscopy into a high precision technique. This impressive work shows a new technique based on the use of optical fibers coupled to photomultipliers allowing its use, author's word, in extreme conditions such as unmanned aircraft vehicles (UAVs) and Mars/Moon rovers.
andreiaries

NASA Face in Space - 4 views

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    Even after reading this sentence: "NASA wants to put a photograph of your face on one of the remaining space shuttle missions and launch it into orbit." it's not clear to me what exactly they plan to do... anyone?
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    I guess it is a symbolic way of flying the space shuttle for the last time! as JAXA does it with your name - if you want to - for all their scientific missions. Nice initiative indeed!
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    Wow, they even mentioned it in the news on the Polish radio yesterday... What I am curious is if they really take the physical (or at least digital) photo and name to the orbit, or is this just, as you called it, "symbolic" ...
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    It is usually for real. Sometimes it is on a plate or slab, sometimes on a DVD, ... I will have my name on STS-134 :-)
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.
LeopoldS

World Space Week - 1 views

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    you all probably prefer Juri's Night (http://yurisnight.net/) to the World Space Week .... but still: any suggestions what we could do during that week as an "event"?
duncan barker

Optics InfoBase - Ultrathin, metamaterial-based laser cavities - 0 views

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    I'm not sure if meta materials can be used to enhance lasers in space........Leopold
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    well .... will have to read this more carefully, but it seems, why not, no principal difference in space on this aspect ... any idea on this José? (in case you read this, which I doubt very much) - or maybe Luzi?
nikolas smyrlakis

UN 'to appoint space ambassador to greet alien visitors' - Telegraph - 2 views

Dario Izzo

Probabilistic Logic Allows Computer Chip to Run Faster - 3 views

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    Francesco pointed out this research one year ago, we dropped it as noone was really considering it ... but in space a low CPU power consumption is crucial!! Maybe we should look back into this?
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    Q1: For the time being, for what purposes computers are mainly used on-board?
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    for navigation, control, data handling and so on .... why?
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    Well, because the point is to identify an application in which such computers would do the job... That could be either an existing application which can be done sufficiently well by such computers or a completely new application which is not already there for instance because of some power consumption constraints... Q2 would be then: for which of these purposes strict determinism of the results is not crucial? As the answer to this may not be obvious, a potential study could address this very issue. For instance one can consider on-board navigation systems with limited accuracy... I may be talking bullshit now, but perhaps in some applications it doesn't matter whether a satellite flies on the exact route but +/-10km to the left/right? ...and so on for the other systems. Another thing is understanding what exactly this probabilistic computing is, and what can be achieved using it (like the result is probabilistic but falls within a defined range of precision), etc. Did they build a complete chip or at least a sub-circiut, or still only logic gates...
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    Satellites use old CPUs also because with the trend of going for higher power modern CPUs are not very convenient from a system design point of view (TBC)... as a consequence the constraints put on on-board algorithms can be demanding. I agree with you that double precision might just not be necessary for a number of applications (navigation also), but I guess we are not talking about 10km as an absolute value, rather to a relative error that can be tolerated at level of (say) 10^-6. All in all you are right a first study should assess what application this would be useful at all.. and at what precision / power levels
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    The interest of this can be a high fault tolerance for some math operations, ... which would have for effect to simplify the job of coders! I don't think this is a good idea regarding power consumption for CPU (strictly speaking). The reason we use old chip is just a matter of qualification for space, not power. For instance a LEON Sparc (e.g. use on some platform for ESA) consumes something like 5mW/MHz so it is definitely not were an engineer will look for some power saving considering a usual 10-15kW spacecraft
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    What about speed then? Seven time faster could allow some real time navigation at higher speed (e.g. velocity of a terminal guidance for an asteroid impactor is limited to 10 km/s ... would a higher velocity be possible with faster processors?) Another issue is the radiation tolerance of the technology ... if the PCMOS are more tolerant to radiation they could get more easily space qualified.....
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    I don't remember what is the speed factor, but I guess this might do it! Although, I remember when using an IMU that you cannot have the data above a given rate (e.g. 20Hz even though the ADC samples the sensor at a little faster rate), so somehow it is not just the CPU that must be re-thought. When I say qualification I also imply the "hardened" phase.
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    I don't know if the (promised) one-order-of-magnitude improvements in power efficiency and performance are enough to justify looking into this. For once, it is not clear to me what embracing this technology would mean from an engineering point of view: does this technology need an entirely new software/hardware stack? If that were the case, in my opinion any potential benefit would be nullified. Also, is it realistic to build an entire self-sufficient chip on this technology? While the precision of floating point computations may be degraded and still be useful, how does all this play with integer arithmetic? Keep in mind that, e.g., in the Linux kernel code floating-point calculations are not even allowed/available... It is probably possible to integrate an "accelerated" low-accuracy floating-point unit together with a traditional CPU, but then again you have more implementation overhead creeping in. Finally, recent processors by Intel (e.g., the Atom) and especially ARM boast really low power-consumption levels, at the same time offering performance-boosting features such as multi-core and vectorization capabilities. Don't such efforts have more potential, if anything because of economical/industrial inertia?
LeopoldS

IISC - International Institute of Space Commerce - 5 views

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    interesting collection / source of reports linked to space ...
pacome delva

TeamParis-SynthEthics - 5 views

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    This is an interesting report from a student in sociology, who worked with a group of scientists on a synthetic biology project for the competition IGEM (http://2009.igem.org/Main_Page). This is what happen when you mix hard and soft sciences. For this project they won the special prize for "Best Human Practices Advance". You can read the part on self or exploded governance (p.34). When reading parts of this reports, I thought that it could be good to have a stagiaire or a YGT in human science to see if we can raise interesting question about ethics for the space sector. There are many questions I'm sure, about the governance, the legitimacy of spending millions to go in space, etc...
Joris _

Earth's atmosphere came from outer space, find scientists - 3 views

  • From that we now know that the volcanic gases could not have contributed in any significant way to the Earth's atmosphere
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    tried to find the original science paper but could not .... the only one I found was this one: http://sciencenow.sciencemag.org/cgi/content/full/2009/1210/2
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    "Plan 9 from outer space" quote confirmed : atmospheric conditions in outer space stall communications! Wonder how many more facts of the movie will prove right in the end...
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    very interesting study. Although it is not so much a surprise, they cite many papers on planetary formation that predicted this, and the only paper on degassing they cite is from our rather unpopular french ex-minister of research c. allegre, who refuses the fact that humans have an impact on climate...
Juxi Leitner

Grappling With Space Debris - 1 views

  • Fortunately, as we speak, the very best space engineers are tackling the problem of how to tackle space debris and get it out of the way.
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    another of those articles...
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    i guess when it says about the very best engineers tackling the problem as we speak, it refers to our brainstorms. How did they find out?
Ma Ru

Space shuttle for sale - 1 views

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    Sort of a follow-up to the story Joris posted a while ago...
Luís F. Simões

Abandoned Remains of the Russian Space Shuttle Project Buran - 0 views

LeopoldS

Mega space storm would kill satellites for a decade - space - 13 September 2011 - New S... - 0 views

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    this is the new scientist version of ithe story ...
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