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Isabelle Dicaire

Scientists Find Bacteria Survive at High Altitudes | Climate Central - 0 views

www.climatecentral.org/...clouds-and-precipitation-15525

shared by Isabelle Dicaire on 29 Jan 13 - No Cached
  • Isabelle Dicaire on 29 Jan 13
     
    Bacteria found at 8-15 km altitude could play a much bigger role in cloud formation and precipitation than previously thought... According to this study bacteria represent around 20 % of the total atmospheric aerosols in their size range! They say it could also have implications for the spread of diseases...
  • LeopoldS on 31 Jan 13
     
    20% ????
LeopoldS

Meteorite Crashes In Russia, Panic Spreads (Updating) - 5 views

gizmodo.com/...rashes-in-russia-panic-spreads

shared by LeopoldS on 15 Feb 13 - No Cached
  • Joris _ on 15 Feb 13
     
    Latest update: the European Space Agency says their experts "confirm there is no link between the meteor incidents in Russia and asteroid 2012DA14 flyby tonight". How did they find this? As they did not see this one coming, how could they come to that conclusion that early!
  • ...5 more comments...
  • johannessimon81 on 15 Feb 13
     
    As you can see from the videos of this meteorite it is coming in from an east to south-east direction (i.e. the direction of the sunrise, more or less). 2012DA14 is coming from due south as you can see here: http://www.wired.com/wiredscience/2013/02/how-to-watch-asteroid-2012-da14/ So the two objects seem to be coming from different directions - at least that would be my explanation.
  • Joris _ on 15 Feb 13
     
    My point is, that if you want to come to such a conclusion (that it is not rubble) you need to be able to construct back the orbits of both objects. 2012DA14 has been observed for one year only, but it is well enough. When the meteor has been observed for the first time, such that we knew its orbit? has it been observed before? if yes, why the impact has not been predicted?
  • johannessimon81 on 15 Feb 13
     
    If you can show that they come from different directions you know that they are not associated, even if you don't reconstruct their orbits.
  • Joris _ on 15 Feb 13
     
    I don't think so. If both objects were part of the same, they would be on different but intersecting orbits anyway, hence different directions. Anyway, I am not knowledgeable in atmospheric entry ... But, with so few information about the object, I am surprised they are 100% certain it is not related to DA14. I think science requires more cautions ... With only the direction they are 100% sure, while the probability of such event is itself extremely small, I am amazed... They can't even predict with 100% certainty where a space debris will fall... plus, nobody consider the object being part of a bigger one that broke up during early entry (which has not been observed) ... so many uncertainties and possible hypothesis... and i am not the only one :) http://www.infowars.com/russian-meteor-linked-to-da14-asteroid/
  • LeopoldS on 17 Feb 13
     
    was not that evident to me also but apparently with the right understanding it was quite clear; was amazed also how quickly NASA has published the likely trajectory of the russian object - have a look at it: quite evident that these are not coming from the same body
  • Joris _ on 17 Feb 13
     
    yes, now i get my 100% certainty with the reconstructed orbits nothing else (http://wiki.nasa.gov/cm/blog/Watch%20the%20Skies/posts/post_1361037562855.html) ... I still think that esa anouncemement was highly premature but with a high probability of being right...
  • Ma Ru on 26 Feb 13
     
    Some more results on the topic (link to an arxiv article inside): http://www.bbc.co.uk/news/science-environment-21579422
jcunha

Corporate culture spreads to Scandinavian universities - 1 views

www.nature.com/...candinavian-institutes-1.21147

universities corporate

shared by jcunha on 15 Dec 16 - No Cached
  • jcunha on 15 Dec 16
     
    "University of Copenhagen fired seismologist Hans Thybo, president of the European Geosciences Union. The official explanation for Thybo's dismissal - his alleged use of private e-mail for work, and telling a postdoc that it is legitimate to openly criticize university management - seems petty in the extreme."
santecarloni

Computer Model Replays Europe's Cultural History  - Technology Review - 2 views

www.technologyreview.com/...27507

computer sociology Science

shared by santecarloni on 19 Jan 12 - No Cached
  • santecarloni on 19 Jan 12
     
    A simple mathematical model of the way cultures spread reproduces some aspects of European history, say complexity scientists
Tom Gheysens

New genes spring, spread from non-coding DNA - 0 views

www.sciencedaily.com/...140123142029.htm

genes spring spread dna science BIO

shared by Tom Gheysens on 24 Jan 14 - No Cached
  • Tom Gheysens on 24 Jan 14
     
    looks like evolution is getting better and better understood
Athanasia Nikolaou

Spray cyanobacteria on the desert to halt its spread - 2 views

www.newscientist.com/...desert-to-halt-its-spread.html

climate BIO

shared by Athanasia Nikolaou on 20 Jan 14 - No Cached
LeopoldS liked it
  • Athanasia Nikolaou on 20 Jan 14
     
    A wide scale 8 year experiment in China on combating desertification seems to have been successful. Instead of using cyanobacteria blooms in the sea, the tested method proposes to spray them on the boundaries of desert/farmland every few days, so that the carbon they capture stays on the ground. It is useful in fixing the organic material against wind erosion only complementary to planting hardy grasses. Very fast result, nevertheless. Could be classified as a geoengineering activity.
  • LeopoldS on 22 Jan 14
     
    130 km2 as next step will be quite an area
LeopoldS

ACT - Opportunities - 3 views

www.esa.int/...openRF.htm

vacancy act opportunities

shared by LeopoldS on 02 Apr 10 - Cached
  • LeopoldS on 02 Apr 10
     
    spread the news - we have re-opened the RF position in innovation dynamics and computational economics ...
darioizzo2

ESA - Telescope-peering AI challenged to spot mystery space objects - 0 views

www.esa.int/..._to_spot_mystery_space_objects

shared by darioizzo2 on 28 May 20 - No Cached
  • darioizzo2 on 28 May 20
     
    spotGEO competition ... spread the news!
santecarloni

Light bends itself round corners - physicsworld.com - 1 views

physicsworld.com/...ght-bends-itself-round-corners

technology PHY science

shared by santecarloni on 07 Dec 12 - No Cached
LeopoldS liked it
  • santecarloni on 07 Dec 12
     
    The Florida team generated a specially shaped laser beam that could self-accelerate, or bend, sideways.
  • LeopoldS on 08 Dec 12
     
    very nice!!! read this e.g. "In addition to this self-bending, the beam's intensity pattern also has a couple of other intriguing characteristics. One is that it is non-diffracting, which means that the width of each intensity region does not appreciably increase as the beam travels forwards. This is unlike a normal beam - even a tightly collimated laser beam - which spreads as it propagates. The other unusual property is that of self-healing. This means that if part of the beam is blocked by opaque objects, then any disruptions to the beam's intensity pattern could gradually recover as the beam travels forward."
Luís F. Simões

The Amazing Trajectories of Life-Bearing Meteorites from Earth - Technology Review - 0 views

www.technologyreview.com/...27720

BIO life meteorite microbes

shared by Luís F. Simões on 11 Apr 12 - No Cached
  • That raises another interesting question: how quickly could life-bearing ejecta from Earth (or anywhere else) seed the entire galaxy? Hara and co calculate that it would take some 10^12 years for ejecta to spread through a volume of space the size of the Milky Way. But since our galaxy is only 10^10 years old, a single ejection event could not have done the trick. However, they say that if life evolved at 25 different sites in the galaxy 10^10 years ago, then the combined ejecta from these places would now fill the Milky Way.
  • Ref: arxiv.org/abs/1204.1719: Transfer of Life-Bearing Meteorites from Earth to Other Planets
LeopoldS

Home | International Space Apps Challenge - 0 views

spaceappschallenge.org

apps

shared by LeopoldS on 11 Mar 12 - No Cached
Joris _ liked it
  • LeopoldS on 11 Mar 12
     
    Why didn't we come up with this :-(
  • Ma Ru on 13 Mar 12
     
    You can still contribute by proposing an interesting challenge, as 90% of those present at the moment revolve around "here in NASA we have tons of data and no clue what to do with it" (booooooriiiiiiiinggg)
Athanasia Nikolaou

Why mental illness is on the rise in academia - 2 views

www.theguardian.com/...ng-problem-pressure-university

Social

shared by Athanasia Nikolaou on 06 Mar 14 - No Cached
  • Athanasia Nikolaou on 06 Mar 14
     
    Interesting discussion is going about, on how work anxiety is spreading in academia, with possible mental consequences. And with robust links to the "Doing What You Love" motto of life/work. Could be proven an unsustainable model though. Recalling of Higgs' recent declaration, that today's Academia productivity demands would be hectic for him, could point to the direction of the problem and the solution...?
pacome delva

Enter the 'thermopower wave' - 0 views

physicsworld.com/...41978

carbon_nanotubes nan power_sources nrg

shared by pacome delva on 16 Mar 10 - Cached
  • Researchers in the US and Korea have discovered that igniting a carbon nanotube, coated in chemically flammable material, can trigger a high-speed wave to race along the tube at 10,000× the speed of the spreading chemical reaction. The new phenomenon, dubbed a "thermopower wave", could lead to a new way of generating electricity and may enable micro power sources to drive nanoscale devices.
Loretta Latronico Poulain

Behavioural Economics? Try Biological Economics - 2 views

ipezone.blogspot.com/...-economics-try-biological.html

science fun

shared by Loretta Latronico Poulain on 08 Mar 11 - No Cached
  • Luís F. Simões on 08 Mar 11
     
    The "Biological Economics" thing is a hyping (or misunderstanding) of the BBC article. The work it refers to seems to be an application of Complex Networks theory to financial networks. I found what appear to be some of the related publications: Andrew G. Haldane (April 2009) Rethinking the financial network (further references in the footnote to page 10) Erlend Nier, Jing Yang, Tanju Yorulmazer and Amadeo Alentorn (April 2008) Network models and financial stability Funny how these issues have been repeatedly popping up at the ACT in recent weeks. This connects both with the discussions on information spreading in networks, and with roadmaps' robustness.
Luís F. Simões

Why Randomly-Selected Politicians Would Improve Democracy - Technology Review - 4 views

www.technologyreview.com/...26488

CMS politics Ig Nobel

shared by Luís F. Simões on 10 Mar 11 - No Cached
LeopoldS liked it
  • If Pluchino sounds familiar, it's because we've talked about him and his pals before in relation to the Peter Principle that incompetence always spreads through big organisations. Back in 2009, he and his buddies created a model that showed how promoting people at random always improves the efficiency of the organisation. These guys went on to win a well-deserved IgNobel prize for this work.
  • Ref: arxiv.org/abs/1103.1224: Accidental Politicians: How Randomly Selected Legislators Can Improve Parliament Efficiency
  • Luzi Bergamin on 10 Mar 11
     
    I think I start to understand why Italian politics does so horribly bad...
  • LeopoldS on 10 Mar 11
     
    ... because they don't follow this rule!
  • Dario Izzo on 11 Mar 11
     
    According to the authors we have four types of people in the parlement: 1) intelligent people whose actions produce a gain for both themselves and for other people. 2) helpless/naive people in the top left quadrant whose actions produce a loss for themselves but a gain for others; 3) bandits whose actions produce a gain for themselves but a loss for other people. 4) stupid people in the bottom left quadrant produce a loss for themselves and also for other people. According to the above definition it is clear that their model does not apply to the italian parlament where we only have stupid people and bandits.
pacome delva

Grandma Plays Favorites -- Balter 2009 (1028): 1 -- ScienceNOW - 1 views

sciencenow.sciencemag.org/...1

bio evolutionary_biology

shared by pacome delva on 29 Oct 09 - Cached
  • A new study finds support for the "grandmother hypothesis," the idea that older women spread their genes most effectively by helping their daughters take care of their children.
  • Thus paternal grandmothers were most beneficial to the survival of their granddaughters and least beneficial to the survival of their grandsons, while maternal grandmothers showed an intermediate effectiveness. Experts are thrilled by the findings. "Wow, very interesting," says Hawkes. "The consistent results across seven populations ... seem to clarify previously inconsistent results." Lorena Madrigal, an anthropologist at the University of South Florida in Tampa, calls the study "an important contribution to a topic of great interest to evolutionary biologists."
ESA ACT

Dynamic spread of happiness in a large social network: longitudinal analysis over 20 ye... - 0 views

www.bmj.com/...a2338

social network INF

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    be happy and infect your neighbors with it :-) ....
ESA ACT

Greece-Related Riots Spread In Europe, Violence Sparked By Greek Teen's Shooting Erupts... - 0 views

www.cbsnews.com/...main4662086.shtml

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    another consequence of globalization? Are our times a-changing?
ESA ACT

TED: Ideas worth spreading - 0 views

www.ted.com/index.php

education technology inspiration innovation

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    Inspired talks by the world's greatest thinkers and doers
pacome delva

Ants Take a Cue From Facebook - ScienceNOW - 2 views

news.sciencemag.org/...-take-a-cue-from-facebook.html

bio ant social_network

shared by pacome delva on 13 Apr 11 - No Cached
  • This pattern of interactions matches how humans share information on social networking sites like Facebook, says the study's lead author, biologist Noa Pinter-Wollman. Most Facebook users are connected to a relatively small number of friends. A handful of users, however, have thousands of friends and act as information hubs.
  • computer simulations of the ants' social networks showed that information flows fastest when a small number of individuals act as information hubs. Fast-flowing information allows ant colonies to respond faster to threats such as predators and weather hazards, Pinter-Wollman says.
  • These well-connected ants might have an advantage in responding to threats, but they are also more vulnerable to infectious diseases, which can spread quickly through the colony.
  • pacome delva on 13 Apr 11
     
    for Tobi! nice analogy between the threat and the fast responding in human network
  • Ma Ru on 13 Apr 11
     
    Yet another example of "because scientifically accurate title would sound sooo boring".
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