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santecarloni

[1106.1470] Evidence for Time-Varying Nuclear Decay Rates: Experimental Results and The... - 2 views

arxiv.org/1106.1470

phy technology

shared by santecarloni on 13 Jun 11 - No Cached
LeopoldS liked it
  • santecarloni on 13 Jun 11
     
    Unexplained annual variations in nuclear decay rates have been reported in recent years by a number of groups. We show that data from these experiments exhibit not only variations in time related to Earth-Sun distance, but also periodicities attributable to solar rotation. Additionally, anomalous decay rates coincident in time with a series of solar flares in December 2006 also point to a solar influence on nuclear decay rates....
  • LeopoldS on 13 Jun 11
     
    can we use space to make a smart experiment to solve this riddle? e.g. sending a decay detecter on a close solar orbit and one to Pluto and then compare decay rates? or a highly elliptical trajectory and compare during peri and apoapsis?
  • santecarloni on 13 Jun 11
     
    I think it could be possible. I need to look into the details. In fact it could probably be done already with the nuclear generators on the Voyager and Pioneer and other nuclear powered probes. That is if the data are precise enough...
Lionel Jacques

Tin hats at the ready: Six-ton satellite will plummet back to Earth… and ther... - 1 views

www.dailymail.co.uk/...llite-plummet-Earth-month.html

space

shared by Lionel Jacques on 12 Sep 11 - No Cached
  • Lionel Jacques on 12 Sep 11
     
    Watch your head
Joris _

$21 Billion Orbiting Solar Array will Beam Electricity to Earth - 0 views

www.physorg.com/news172224356.html

MAD energy

shared by Joris _ on 16 Sep 09 - Cached
  • The project, to be undertaken by a research group from 16 companies including Mitsubishi Heavy Industries Ltd, aims to spend the next four years developing the technology needed to beam the electricity produced to earth
  • not be commercially viable at today's prices
LeopoldS

NASA - Climate Simulation Computer Becomes More Powerful - 0 views

www.nasa.gov/...climate_computing.html

climate modelling Earth System Sciences

shared by LeopoldS on 28 Aug 09 - Cached
  • LeopoldS on 28 Aug 09
     
    just to make Nina and Friederike envious ...
Francesco Biscani

Why is the Earth moving away from the sun? - space - 01 June 2009 - New Scientist - 0 views

www.newscientist.com/...-moving-away-from-the-sun.html

celestial mechanics astronomy

shared by Francesco Biscani on 02 Jun 09 - Cached
  • Francesco Biscani on 02 Jun 09
     
    More fascinating Celestial Mechanics stuff...
LeopoldS

NHESS - Home - 0 views

www.natural-hazards-and-earth-system-sciences.net

Earth System Sciences natural disasters modelling environment systems

shared by LeopoldS on 13 May 09 - Cached
  • LeopoldS on 13 May 09
     
    especially interesting also for the two new girls, Nina and Friedericke joigning us in a few weeks ...
Francesco Biscani

BBC - Earth News - Ant mega-colony takes over world - 0 views

news.bbc.co.uk/...8127519.stm

bio ants

shared by Francesco Biscani on 01 Jul 09 - Cached
  • Francesco Biscani on 01 Jul 09
     
    Amazing!
pacome delva

APOD: 2008 November 25 - Fireball Over Edmonton - 0 views

apod.nasa.gov/ap081125.html

astronomy meteorite

shared by pacome delva on 11 Jun 09 - Cached
pacome delva liked it
  • pacome delva on 11 Jun 09
     
    Around 40 000 tons a year of meteorite falls on Earth. Be lucky !!!
ESA ACT

Energy Imbalance Behind Global Warming | LiveScience - 0 views

www.livescience.com/...050428_solar_energy.html

global_warming energy NASA carbon climate CO2 complex_systems renewables power NRG

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    The measured energy imbalance of Earth
ESA ACT

An astronomical solution to an old quantum problem - 0 views

physics.aps.org/...19

PHY MAD NAN science

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    An atomic physics experiment demonstrates a solution to an eighty-year-old quantum conundrum by mimicking in an atom the astronomical problem of a satellite moving in a sun-earth system. How to stabilize a wave packet?
ESA ACT

Is Earth at the heart of a giant cosmic void? - 0 views

www.newscientist.com/...rt-of-a-giant-cosmic-void.html

PHY theory space

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    For those who think that we already know very much about the universe...
ESA ACT

ACPD - Papers in Open Discussion - 0 views

www.atmos-chem-phys-discuss.net/papers_in_open_discussion.html

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    Useful journal for the upcoming Earth Systems Science. For geoengineering, check out this: http://www.atmos-chem-phys-discuss.net/9/2559/2009/acpd-9-2559-2009.pdf (currently first on the list of this bookmark)
ESA ACT

WikipediaVision (beta) - 0 views

www.lkozma.net/index.html

online social web2.0 Wiki

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    Mash-up application: see on Google Earth who contributes to Wikipedia
nikolas smyrlakis

BBC NEWS | Asia-Pacific | Scientists bring snow to Beijing - 2 views

news.bbc.co.uk/...8337337.stm

china asia Weather Modification Office climate change

shared by nikolas smyrlakis on 02 Nov 09 - Cached
  • nikolas smyrlakis on 02 Nov 09
     
    Did you know about this Weather Modification Office? Promising or dodgy?
  • Friederike Sontag on 03 Nov 09
     
    Yes. In China it happens apparently quite often that weather is regionally modified, e.g. in order to have good weather conditions during certain events (like olympics in Beijing). But also in other countries weather modification is applied, for reasons of agriculture, pollution, skiing, etc. Obviously, one wonders on the environmental impact of such an artificial cloud feeding process with silver iodide. I just googled, stumbling upon this report http://www.weathermodification.org/AGI_toxicity.pdf which published the result: no environmentally harmful effects...
  • Friederike Sontag on 03 Nov 09
     
    and w.r.t. ur question: I mean different weather conditions which we experience locally (like droughts or other extreme weather events) are (often) due to large-scale/global climatic changes. Hence, cloud seeding just describes a local, short-term mitigation of these events. However, there is a geoengineering proposal (so climate modification) which also suggests to seed clouds above the sea (i.e. increase cloud coverage, e.g. by using seaspray as cloud condesation nuclei), thereby increasing the planetary albedo (Earth reflectance) and reducing the energy reaching the Earth surface. If this idea is promising or not, I couldn't judge upon, but for sure it is worthwhile to take a closer look at.
Juxi Leitner

Launch Debris Could Be Tracked Like Vultures | Wired Science | Wired.com - 2 views

www.wired.com/...space-junk-tracking

debris technology

shared by Juxi Leitner on 20 Nov 09 - Cached
  • Juxi Leitner on 20 Nov 09
     
    also interesting (for the Earth Science girls): Nilton Renno of the University of Michigan, who studies how rocket plumes from Mars landers affect the Martian surface.
Ma Ru

Dark Matter or Black Hole Propulsion? - 1 views

www.newscientist.com/...s-for-interstellar-travel.html

NRG propulsion star travel space PHY

shared by Ma Ru on 25 Nov 09 - Cached
  • Ma Ru on 25 Nov 09
     
    Anyone out there still doing propulsion stuff? Two more papers just waiting to get busted... http://arxiv.org/abs/0908.1429v1 http://arxiv.org/abs/0908.1803
  • ...5 more comments...
  • Luzi Bergamin on 26 Nov 09
     
    What an awful bunch of complete nonsense!!! But I don't think anybody wants to hear MY opinion on this...
  • pacome delva on 26 Nov 09
     
    wow, is this serious at all...!?
  • Luzi Bergamin on 26 Nov 09
     
    Are you joking?? The BH drive propses a BH with a lifetime of about an year, just 10^7 tons, peanuts!! Then you have to produce it, better not on Earth, so you do this in space, with a laser that produces an equivalent of 10^9 tons highly foucussed, even more peanuts!! Reasonable losses in the production process (probably 99,999%) are not yet taken into account. Engineering problems... :-) The DM drive is even better, they want to collect DM and compress it in a propulsion chamber. Very easy to collect and compress a gas of particles that traverse the Earth without any interaction. Perhaps if the walls of the chamber are made of artificial BHs?? Who knows??
  • LeopoldS on 26 Nov 09
     
    WRONG!!! we are all just WAITING for your opinion on this ....!!!
  • pacome delva on 27 Nov 09
     
    well, yes my remark was ironic... I'm surprised they did a magazine on these concepts...! But the press is always waiting for sensational. They do not even wait for the work to be peer-reviewed now to make an article on it ! This is one of the bad sides of arxiv in my opinion. It's like a journalist that make an article with a copy-paste in wikipedia ! Anyway, this is of course complete bullsh..., and I would have laughed if I had read this in a sci-fi book... but in a "serious" article i'm crying... For the DM i do not agree with your remark Luzi. It's not dark energy they want to use. The DM is baryonic, it's dark just because it's cold so we don't see it by usual means. If you believe the in the standard model of cosmology, then the DM should be somewhere around the galaxies. But it's of course not uniformly distributed, so a DM engine would work (if at all...) only in the periphery of galaxies. It's already impossible to get there...
  • Luzi Bergamin on 27 Nov 09
     
    One reply to Pacome, though the discussion exceeds by far the relevance of the topic already. Baryonic DM is strictly limited by cosomology, if one believes in these models, of course. Anyway, even though most DM is cold, we are constantly bombarded by some DM particles that come together with cosmic radiation, solar wind etc. etc. If DM easily interacted with normal matter, we would have found it long ago. In the paper they consider DM as neutralinos, which are neither baryonic nor strongly or electromagnetically interacting.
  • pacome delva on 27 Nov 09
     
    well then I agree, how the fu.. they want to collect them !!!
LeopoldS

Spaceflight Now | Breaking News | Soyuz rocket lifts off with Russian spy satellite - 1 views

www.spaceflightnow.com/...27soyuz

shared by LeopoldS on 02 Jul 11 - No Cached
  • LeopoldS on 02 Jul 11
     
    I am quite amazed that they apparently still use the capsules to return the pictures??? Hard to believe .... "Kobalt spacecraft reportedly carry canisters to return film to Earth during the satellite's mission, which will last at least several months."
Thijs Versloot

GPS satellites suggest Earth is heavy with dark matter @NewScientist - 0 views

www.newscientist.com/...is-heavy-with-dark-matter.html

GPS darkmatter

shared by Thijs Versloot on 03 Jan 14 - No Cached
  • Thijs Versloot on 03 Jan 14
     
    At a meeting of the American Geophysical Union in San Francisco in December, he reported an average figure that was between 0.005 and 0.008 per cent greater than the value for Earth's mass established by the International Astronomical Union. A disc of dark matter around the equator 191 kilometres thick and 70,000 km across can explain this, he says. Harris has yet to account for perturbations to the satellites' orbits due to relativity, and the gravitational pull of the sun and moon. Maybe relativistic GPS could improve this even further? As a side note however, the Juno spacecraft flyby showed an gravity acceleration which matched the calculations, casting doubts on the earlier calculations.
Daniel Hennes

Earth - visualization of global weather conditions - 2 views

earth.nullschool.net

science

shared by Daniel Hennes on 03 Jan 14 - No Cached
  • Daniel Hennes on 03 Jan 14
     
    A visualization of global weather conditions forecast by supercomputers updated every three hours.
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