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Tobias Seidl

A curvy, stretchy future for electronics - PNAS - 0 views

  • Electronics of the future will be soft and rubbery.
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    If electronics are soft and rubbery, would they maybe also tolerate launch- or landing-related vibrations better? Could we pack things more robust? Probably things get too fluffy for space engineers?
santecarloni

Microscope probes living cells at the nanoscale - physicsworld.com - 1 views

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    Researchers in the US and UK say they have invented a new microscopy technique for imaging live tissue with unprecedented speed and resolution. The technique involves using the tiny tip of an atomic force microscope to tap on a living cell and analysing the resulting vibrations to reveal the mechanical properties of cell tissue. The team says that the technique could have widespread applications in medicine. However, another expert in the field suggests that the group has not demonstrated the superiority of the technique to those already available.
Tom Gheysens

First step towards 'programmable materials': Sheet metal that never rattles -- ScienceD... - 2 views

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    Very nice new concept for active vibration damping. I think this has huge potential for space applications
Thijs Versloot

Vibrational free cooling systems for sensors - 1 views

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    The system is based on two liquids which are adsorbed. As the sensor generates heat, the liquids desorb and the pressure builds up, it can then move to an expansion vessel which is held at a cooler temperature and the liquid then adsorb together again. This technique requires no mechanical compression and there are less vibration, leading to less wear and tear of components. It is being developed in a joint collaboration between UTwente and Dutch Space.
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.
dejanpetkow

Polymers with very strong Piezoelectric effect discovered - 0 views

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    Harvesting vibrational energy?
LeopoldS

Shake, rattle and … power up? - MIT News Office - 0 views

  • Instead of taking a cantilever-based approach, the team went a slightly different route, engineering a microchip with a small bridge-like structure that’s anchored to the chip at both ends. The researchers deposited a single layer of PZT to the bridge, placing a small weight in the middle of it. The team then put the device through a series of vibration tests, and found it was able to respond not just at one specific frequency, but also at a wide range of other low frequencies. The researchers calculated that the device was able to generate 45 microwatts of power with just a single layer of PZT — an improvement of two orders of magnitude compared to current designs.
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    should we have another look at this type of technology?
pacome delva

Gizmo Converts Light Into Motion -- Cho 2009 (1020): 1 -- ScienceNOW - 1 views

  • A tiny ladderlike beam of silicon converts light into vibrations and vice versa with extremely high efficiency
ESA ACT

Dynamics of phononic dissipation at the atomic scale: Dependence on internal degrees of... - 0 views

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    Dynamics of dissipation local vibrations to the surrounding substrate is a key issue in friction between sliding surfaces as well as in boundary lubrication.
Daniel Hennes

CubeSat Ambipolar Thruster - 2 views

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    "Cast your name into deep space in style!"
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    Interesting approach, but with 99.9% probability they will miserably fail (at least in terms of their time schedule) simply because the technology is untested. I haven't read the refs (which miss by the way important works of E. Ahedo et al. on magnetic nozzle acceleration by ambipolar effects), but 1. using water means that you produce oxygen radicals which will erode chamber walls (ionisation efficiency is not 100% and experimental tests haven't been performed yet). 2. Electronic excitation (and radiation), rotational excitation, vibrational excitation, and dissociation are all processes which consume energy and reduce ionisation efficiency drastically. 3. It is a miniaturised Helicon thruster. Theoretical analysis probably does not consider near field effects. Far field models are probably not applicable due to the size of the thruster. I expect some surprises during thruster testing. In any case - good luck!
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    Apparently, there is only one qualification constraint regarding CubeSat propulsion which is related to volatile propellant. Since they use water as propellant and are also the owner of the CubeSat it is actually up to them how they qualify their thruster. Given that it is also possible to qualify the thruster within 18 months - since they define what "qualification" means.
Lionel Jacques

LED converts heat into light - 0 views

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    "A light-emitting diode (LED) that emits more light energy than it consumes in electrical energy has been unveiled by researchers in the US. The device - which has a conventional efficiency of greater than 200% - behaves as a kind of optical heat pump that converts lattice vibrations into infrared photons, cooling its surroundings in the process."
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    Sorry, did not see that you have already posted this one ...
Luke O'Connor

MIT Creates Amazing UI From Levitating Orbs - 1 views

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    See 1:13 in the video: could be useful for GTOC!
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    hyper cool!!!! but I am not convinced it will ever be able to overcome the intrinsic instabilities created by manipulating a magnetic field ..... you can actually see in the video the undamped vibrations in the motion ....
Athanasia Nikolaou

Another theory for the sense of smell - 1 views

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    Luca Turin presents a theory according to which the sense of smell is aroused by molecular vibrations instead of the shape-based compatibility with receivers on the proteins.
pacome delva

Algae Show a Knack for Quantum Mechanics -- Berardelli 2010 (203): 3 -- ScienceNOW - 1 views

  • the discovery will open up a new field of research, and it could lead to a new generation of superefficient light-sensitive devices.
  • the experiments showed that the electron vibrations resulting from the photons striking the antennas persisted at full strength four times longer than expected. The reason, the researchers report this week in Nature, is that quantum mechanics controls the energy. "It was an utter surprise," says physical chemist and co-author Gregory Scholes of the University of Toronto in Canada. For the results to have occurred, he explains, a property called quantum coherence must have been operating.
  • the research "will open an entirely new area of biophysics." And that effort should have "huge implications," he says, "not only for how we think about biophysics, but also light harvesting and light-sensitive devices."
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    Very interesting work, showing that apparently algae mastered quantum coherence a few years before us... Inspiring for a new type of light-sensitive devices, and perhaps other applications...
jcunha

Missing link in metal physics explains Earth's magnetic field - 0 views

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    In a work published on Nature (http://www.nature.com/nature/journal/v517/n7536/full/nature14090.html#affil-auth) a new DFT based simulation of convection in Earth's Core iron shows that electron-electron scattering has a similar contribution to electron's thermal vibration. The outcome is that using the old dynamo theory the simulation matches the Earth magnetic field experimental results, solving an 80 years old puzzle.
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    Yay to science! I'm always intrigued by related experiments that try to measure material properties at the GPa range. Especially, the efforts of reaching 'metallic hydrogen' (http://en.wikipedia.org/wiki/Metallic_hydrogen), requiring pressures above 25GPa at which hydrogen becomes conductive. It is thought that gas giant planets could have such a core, but no-one has been able to produce/verify this theory as off yet.
Paul N

Have We Been Interpreting Quantum Mechanics Wrong This Whole Time? - 6 views

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    "The experiments involve an oil droplet that bounces along the surface of a liquid. The droplet gently sloshes the liquid with every bounce. At the same time, ripples from past bounces affect its course. The droplet's interaction with its own ripples, which form what's known as a pilot wave, causes it to exhibit behaviors previously thought to be peculiar to elementary particles - including behaviors seen as evidence that these particles are spread through space like waves, without any specific location, until they are measured." Pilot-wave theory reresurrected. Maybe something for the next "fundamental" :P physics RF?
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    And for the next 'Experimental Physics Stagiaire' position why not try to do "Unpredictable Tunneling of a Classical Wave-Particle Association" http://stilton.tnw.utwente.nl/people/eddi/Papers/PhysRevLett_TUNNEL.pdf, there are some rumors online that the results of Yves Couder Experiments can be reproduced with simple DIY vibrating tables! It is very funny to see the videos of the MIT's replication of this experiment (with lightening legends for those who are uncomfortable with the concepts involved https://www.youtube.com/watch?v=YF5iHQMjcsM)
LeopoldS

Extracting audio from visual information | MIT News Office - 3 views

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    nice video and nice story, no revolution in physics and somehow surprising that not done/tried earlier (maybe just again good MIT public relations work?)
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    CSI writers will have to up the ante now.
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    it was probably already done... by the NSA
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