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johannessimon81

Giant rogue planet, without a home star, may roam nearby heavens - 3 views

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    Great work from my former colleagues in Montreal. For more information (in french, sorry) please click on: http://www.nouvelles.umontreal.ca/recherche/sciences-technologies/20121114-perdue-dans-lespace-des-astronomes-lont-enfin-trouvee.html
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    Nice! How much dark matter still left to find?
Joris _

Prezi - Ideas matter. - 2 views

shared by Joris _ on 27 Mar 13 - Cached
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    Prezi is a cloud-based presentation software that opens up a new world between whiteboards and slides. The zoomable canvas makes it fun to explore ideas and the connections between them. The result: visually captivating presentations that lead your audience down a path of discovery.
johannessimon81

New type of matter discovered..? - 3 views

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    Scientists may have discovered a 4-quark particle...
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    A combination of two quark-antiquark pairs could be possible, maybe strongly interacting if they are all of similar types (charm and anti-charm in this case) or it may be via gluon exchange by the strong force.. Intriguing...
LeopoldS

How Apple Killed the Linux Desktop and Why That Doesn't Matter | Wired Enterprise | Wir... - 2 views

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    nice read ... let's hope since Apple got anyway already too powerful
Lionel Jacques

Radio-wave excess could point to dark matter - 1 views

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    Sante? Luzi?
santecarloni

Getting to the froth of the matter - physicsworld.com - 1 views

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    Whether it is the frothy milk on your cappuccino, the soapy suds in your bath or the large-scale structure of the universe, foams have intrigued physicists for many years. Now, for the first time in a lab, an international group of scientists has made the Weaire-Phelan foam - which physicists believe is the lowest-energy structure for a foam formed of equal-volume bubbles.
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    Does this mean that there is foam that is non regular that can have even less energy structure? "which physicists believe is the lowest-energy structure for a foam formed of equal-volume bubbles."
pandomilla

Experience teaches plants to learn faster and forget slower in environments where it ma... - 4 views

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    The work of our team on the Mimosa Pudica has been publish! It proves for the first time the ability of plants to learn. After a countless number of rejections, Oecologia had the courage of publishing it. Now the road is open to demonstrations that learning capability exists not only in sensitive plants, but also in normal plants. This can change the entire biology. A bit rhetorical, but real.
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    very nice!!! congratulations! what are you working on now - also on this?
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    I work on some aspects of plant to plant communication! I hope to publish soon something equally exciting!! and of course I will let you know!!
johannessimon81

Cosmological model without accelerated expansion proposed - 1 views

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    Redshift in this model is partially produced by a change in the masses of elementary particles (and atoms)
  • ...3 more comments...
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    It seems to solve the problem of infinite energy density at the singularity in any case. I would love to see a way of experimentally verifying this, although most people seem to believe it is wrong. I read the following quote though by Dirac to Pauli "we all agree your idea is crazy, but the real question is it crazy enough to be correct?"
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    As far as I can see, this is not untestable per se, rather an explanation to the redshift that is equivalent to accelerating expansion. It is not that the theory is untestable, rather just another way of looking at it. Kind of like that its sometimes convenient to consider light a particle, sometimes a wave. In the same way it could sometime convenient to view the universe as static with increasing mass instead.
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    Well the premiss "matter getting heavier" may be up to falsification in some way or another. Currently, there is no absolute method to determine mass so it might even be plausible that this is actually the case. I don't think it is related but there is a problem with the 1kg-standards (1 official and 6 copies) where the masses seem to deviate.
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    It should not be impossible to verify a change in mass(es) over time. For example the electron cyclotron frequency scales ~e/m while the Hydrogen emission frequencies scale with ~m*e^4. Using multiple relationships like that which can be easily and accurately measured an increase in the mass of fundamental particles should - in principle - be detectable (even if the mass of the earth increases at the same time changing the relativistic reference frame).
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    The Watt balance and a definition using the Planck's constant seems to do the trick and is currently being discussed. Would the electron charge not be problematic as it is related to Coulombs which depends on Amperes which is defined by Newtons which hence depends back on the mass again?
Aurelie Heritier

Have Harvard Scientists Created A Real Lightsaber? Kind Of. - 0 views

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    A joint Harvard-MIT research program led by Harvard Professor of Physics Mikhail Lukin and MIT Professor of Physics Vladan Vuletic has created a new state of matter the two describe as extremely similar to the lightsabers seen in "Star Wars."
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    "Photonic molecules"? Intriguing..
Athanasia Nikolaou

Science on Mars and Mars on Science - 0 views

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    Some sort of organic carbon has been detected by the sampling of Curiosity; the contamination source was isolated and the signal persists. The scientists suggest as a source meteorites transporting interstellar matter, or maybe some sort of ancient life whose biomass production only survived cosmic radiation as it was buried underground. a big deal: six relevant articles were published simultaneously online: http://www.sciencemag.org/site/extra/curiosity/index.xhtml?utm_content=&utm_medium=Facebook&utm_campaign=Science&utm_source=shortener
Thijs Versloot

Does your iPhone have free will? #arXiv - 3 views

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    If you've ever found your iPhone taking control of your life, there may be a good reason. It may think it has free will. That may not be quite as far-fetched as it sounds. Today, one leading scientist outlines a 'Turing Test' for free will and says that while simple devices such as thermostats cannot pass, more complex ones like iPhones might.
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    An interesting paper about how you should *NOT* think about free will...
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    I must say that the fact that the outcome of a thought process is not evident to myself in advance sounds like a more plausible explanation than 'free will' being the product of quantum mechanics. The later would not only produce unpredictable decisions but probably also irrational ones...
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    Even if it were the product of quantum mechanics, it's still the result of external interference and not the result of 'free' will. It doesn't matter if the external input is deterministic or random, it's still external and it's not "YOU" that decided stuff.
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    I don't know the inventor of that nonsense that the free will should be the result of QM. It's about the only point I agree with the author of the paper: QM is not necessary and doesn't help. What I meant: all these thought experiments done by typical ultra-naive realists (or ultra-naive physicalists, if you prefer) that cultivate the university departments of physics, computer science etc. are put the cart before the horse. First one has to clarify the role of physical theories and its concepts (e.g. causality) and then one can start to ask how "free will" could perhaps be seen in these theories. More than 200 years ago there existed a famous philosopher named Kant who had some interesting thoughts about this. But authors like Lloyd behave as if he never existed, in fact is view of the world is even pre-Platonic!
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    Henry Kissinger How I'm missing yer And wishing you were here
Thijs Versloot

Dwarf planet could illuminate the dark sector - 1 views

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    A dwarf-planet candidate called UX25 and its tiny satellite could provide the first evidence of a new cosmological model that includes antigravity, say Alberto Vecchiato and Mario Gai of the Astrophysical Observatory of Turin in Italy.
Nina Nadine Ridder

Is Hawking any closer to solving the puzzle of black holes? - 2 views

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    After this lunch lecture probably not as ground breaking as I thought earlier but still an interesting read... "The new solution involves supertranslations, something that I have yet to get my head properly around. But it seems to rely on the well known fact that an "image" of infalling matter seems to get imprinted onto the "surface" of a black hole."
Nina Nadine Ridder

Sentinel-2 catches eye of algal storm - 0 views

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    The Sentinel-2A satellite has been in orbit for only a matter of weeks, but new images of an algal bloom in the Baltic Sea show that it is already exceeding expectations. Built essentially as a land monitoring mission, Sentinel-2 will also certainly find its way into marine applications.
Thijs Versloot

New theory to lead to radiationless revolution - 3 views

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    Physicists have found a radical new way to confine electromagnetic energy without it leaking away, akin to throwing a pebble into a pond with no splash. The theory could have broad ranging applications from explaining dark matter to combating energy losses in future technologies.
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    I think (but am not sure) that is related to a topic that Dirk Bouwmeester's group at Leiden University works on for a while now: "Linked and knotted beams of light" http://irvinelab.uchicago.edu/papers/nphys1056.pdf
LeopoldS

Short-term meditation induces white matter changes in the anterior cingulate - PNAS - 3 views

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    one more try to get you interested in this ... seems that it is slowly but surely moving into the domain of serious science ...
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    Why don't you try this out? 10 minutes group meditation before every ACT meeting... Should be fun!
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    Great, just great!! The conclusion seems to be "Thus IBMT could provide a means for improving self-regulation and perhaps reducing or preventing various mental disorders." Why all this neuro-bio-nonsense?? Wasn't this conclusion known before just using good old classic psychology and similar? Again one of these studies that thinks to provide new evidence just because they made a boring brain scan...
Francesco Biscani

BBC News - Study hints at dark matter action - 0 views

shared by Francesco Biscani on 16 Feb 10 - Cached
Ma Ru liked it
  • "We can't rule them out as being a signal but we can't conclude that they are a signal."
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    Gotta love the scientific method :)
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    Have to remember this very useful sentence...
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    haha
Francesco Biscani

Hot And Heavy Matter Runs A 4 Trillion Degree Fever - Science News - 1 views

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    Saturday night fever.
pacome delva

Supernovae put dark matter in the right place - 3 views

  • “one of the best papers I have ever seen”
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    Well, with these huge numerical simulation you're never sure of anything... Anyway the idea sounds quite convincing and simple.
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    Whops, sorry for the duplicate bookmark above :)
pacome delva

The Quasar That Built a Galaxy - 0 views

  • One of the quasar's jets is aimed directly at the galaxy, and the team thinks it's likely that the jet is driving the star-making process by blasting matter into the galaxy.
  • The discovery creates a new picture of galaxy formation
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