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-- The Awesome Science Thread
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Posted by Trance-M on Sep-19-2013 20:06:

I like studies like these:

Bumblebee flight inspires 'bad weather robot' design

http://www.bbc.co.uk/news/science-environment-24149440


Posted by Halcyon+On+On on Oct-08-2013 15:28:

http://www.bbc.co.uk/news/science-environment-24429621

:0


Posted by Halcyon+On+On on Dec-02-2013 18:40:

http://www.cracked.com/article_2070...e-are-real.html

SCIENCE!


Posted by Acton on Dec-02-2013 19:26:

quote:
Separating Mixed Liquids by Stirring the Other Way


In this forum we obey the laws of thermodynamics!


Posted by Trance-M on Dec-19-2013 18:32:


Posted by Desiderata on Jan-26-2014 05:50:

http://www.nature.com/news/stephen-...k-holes-1.14583

quote:
Now Hawking proposes a third, tantalizingly simple, option. Quantum mechanics and general relativity remain intact, but black holes simply do not have an event horizon to catch fire. The key to his claim is that quantum effects around the black hole cause space-time to fluctuate too wildly for a sharp boundary surface to exist.

In place of the event horizon, Hawking invokes an �apparent horizon�, a surface along which light rays attempting to rush away from the black hole�s core will be suspended. In general relativity, for an unchanging black hole, these two horizons are identical, because light trying to escape from inside a black hole can reach only as far as the event horizon and will be held there, as though stuck on a treadmill. However, the two horizons can, in principle, be distinguished. If more matter gets swallowed by the black hole, its event horizon will swell and grow larger than the apparent horizon.


Posted by Halcyon+On+On on Apr-10-2014 16:51:

nbd

http://blogs.discovermagazine.com/d...l/#.U0bLzflSa3J


Posted by Joss Weatherby on Apr-10-2014 18:01:

Uh, I am disturbed that the gene is called FOXN1.

SNAAAAAKE!!!!!!


Posted by Sushipunk on Apr-10-2014 23:01:

quote:
Originally posted by Halcyon+On+On
nbd

http://blogs.discovermagazine.com/d...l/#.U0bLzflSa3J


Sweet.


Posted by Acton on Apr-23-2014 18:42:

Oh hello, what's going down in Science Town?


Posted by Halcyon+On+On on Apr-23-2014 20:05:

I read about these sorts of things all the time, and they make sense to me on paper. But even a single thought as to just what the actual fuck is going on is complete madness:

http://sci.esa.int/xmm-newton/53980...-by-xmm-newton/



This is two unimaginably dense black holes eating a star, as if they were a pack of wolves.


Posted by rdevito on Apr-23-2014 20:51:

quote:
Originally posted by Acton
Oh hello, what's going down in Science Town?


A Mathematical Proof That The Universe Could Have Formed Spontaneously From Nothing


Posted by Lagrangian on Jun-04-2014 10:19:

http://m.us.wsj.com/articles/new-ch...hones-140175293

quote:
Emissive quantum photonic imagers comprised of a spatial array of digitally addressable multicolor pixels. Each pixel is a vertical stack of multiple semiconductor laser diodes, each of which can generate laser light of a different color. Within each multicolor pixel, the light generated from the stack of diodes is emitted perpendicular to the plane of the imager device via a plurality of vertical waveguides that are coupled to the optical confinement regions of each of the multiple laser diodes comprising the imager device. Each of the laser diodes comprising a single pixel is individually addressable, enabling each pixel to simultaneously emit any combination of the colors associated with the laser diodes at any required on/off duty cycle for each color. Each individual multicolor pixel can simultaneously emit the required colors and brightness values by controlling the on/off duty cycles of their respective laser diodes.


https://www.google.com/patents/US7623560


Posted by Trance-M on Jun-17-2014 14:34:

Indeed, Snowpiecer:

http://interestingengineering.com/c...ain-to-the-u-s/


Posted by Halcyon+On+On on Jun-17-2014 14:44:

It will probably never happen, but that is really intense. I cannot even fathom the logistics of such a project. Really makes me want to get dry suit certification for diving...


Posted by Halcyon+On+On on Aug-01-2014 20:33:

UHHH

http://sploid.gizmodo.com/nasa-reve...ce-t-1614549987


Posted by Sushipunk on Aug-01-2014 22:31:

quote:
Originally posted by Halcyon+On+On
UHHH

http://sploid.gizmodo.com/nasa-reve...ce-t-1614549987


Sweet!


Posted by Lagrangian on Aug-05-2014 12:24:

An Article about Stem Cells Biomimetic Memristors and that fucking second floor mexican Ted Cruz.


Posted by Lagrangian on Aug-26-2014 20:06:

Neato

http://www.nytimes.com/2014/08/24/f...ss&emc=rss&_r=0


Posted by Lagrangian on Sep-01-2014 13:51:

Troll

http://www.google.com/patents/US20110278559


Posted by OrangestO on Sep-07-2014 14:06:


Posted by Guest on Sep-07-2014 15:16:

^ So fucking awesome. Reposted on my FB


Posted by Trance-M on Sep-08-2014 17:25:

quote:
Originally posted by chris1011
^ So fucking awesome. Reposted on my FB


Indeed and worth sharing, I read about it last week, but this vid makes it much more interesting.


Posted by Lagrangian on Sep-09-2014 10:02:

quote:
The unique ability of geckos to scale walls and suspend from ceilings has attracted the interest of naturalists for ages, dating back to Aristotle�s observations in his History of Animals of the creature�s ability to �run up and down a tree in any way.�[1] It is only recently that scientists have unlocked the secret behind the lizards� perplexing mobility and begun engineering synthetic materials mimicking their abilities.

Gecko Feet Structure and Intermolecular Forces

A gecko�s foot has toepads consisting of about half a million setae made of keratin. Each of these fine hairs has hundreds of even smaller projections of nanoscale diameters called spatulae protruding from their ends.[2] While many interactions had been hypothesized as the origin of the adhesion, such as suction, friction, and electrostatic forces, it was not until 2000 that Robert Full of the University of California, Berkeley, discovered that the adhesion was due to van der Waals forces created between the spatulae and the surface.[2] Van der Waals forces are intermolecular forces created by induced polarizations of molecules. Though weak and negligible in most considerations, van der Waals forces become significant on the micro and nanoscale. In the case of gecko feet, the spatulae are so small and get so close to the surface that an attractive van der Waals force of around 0.4 �N develops between a single spatula and a surface.[2] While a seemingly insignificant number, the combined force of the millions of spatulae on a single gecko foot produce an adhesion force of around 10 N, or around 2.25 lbs.[2] Considering a gecko foot has an area around only 100 mm2, it was inevitable that scientists would attempt to mimic the power and efficiency of such a material.



Animation adapted from Shah[4]

It was later discovered that van der Waals forces are not the only forces responsible for a gecko�s ability. Andre Geim, who is responsible for synthesizing gecko setae, discovered that capillary forces also contribute to the adhesion. Capillary forces are attractive forces created by the surface tension of a molecular layer of absorbed water that forms between two surfaces.[2] When a gecko is climbing on a hydrophilic surface, capillary forces combine with van der Waals forces to keep the gecko in place. On hydrophobic surfaces, however, van der Waals forces play the primary role.

Fabricating Nature

In 2003, Andre Geim and fellow researchers at the University of Manchester succeeded in creating a synthetic material that mimics gecko feet called gecko tape. While composed of a different material, gecko tape has a similar structure to the toepads of the lizards. The fabrication process of the tape involves many cutting edge nanotechnology methods. First, a polyimide film substrate is prepared on a silicon wafer. Then an aluminum mask is created through electron beam lithography, a process where a beam of electrons is used to create nanoscale patterns on a surface.[3] This mask is then transferred to the polyimide film through dry etching, a procedure where ions are bombarded against the metal to remove the mask, leaving only the substrate and the projecting polyimide hairs. The material is then removed from the silicon wafer and attached to a flexible base, which allows the material to adhere better to surface, which is usually not flat due to microscopic imperfections.[3] In order to test the adhesive force of the resulting array of polyimide hairs, Geim used an atomic force microscope (AFM) with a cantilever tip and measured the deflection of the tip. As hypothesized, each hair had around the same adhesive force as a single gecko seta.[3]

The Future of Biomimetic Adhesives

While many problems still obstruct immediate commercial applications of gecko tape, such as poor durability and high fabrication costs, the prospects of the technology are still generating excitement in a variety of fields. An adhesive material that exploits intermolecular forces could be crucial in certain environments where conventional adhesion tools such as suctions and glues cannot function; for instance, a descendent of gecko tape might enable astronauts to perform spacewalks with the tape affixing the astronaut�s boots to the spacecraft, eliminating the need for complex harnesses. In more typical circumstances, the incredible strength of gecko tape could be used in a myriad of applications, such as increased mobility for humans in construction, inspection, and military situations. The fact remains that as we progress in our understanding and utilization of the most fundamental forces of nature, we will be able to approach problems once though unsolved from a new direction, specifically, from the bottom-up.



[1] Aristotle
[2] Autumn, K., Liang, Y., Hsieh, S., Zesch, W., Chan, W., Kenny, T., Fearing, R., Full, R.
[3] Grigorieva, I., Geim, A., Dubonos, S., Novoselov, K., Zhukov A., Shapoval, S.
[4] Shah,G.


Posted by JEO on Sep-09-2014 11:50:


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