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| bio | website | migdal.wikidot.com/en |
|---|---|---|
| location | Castelldefels, Spain | |
| age | 27 | |
| visits | member for | 1 year, 5 months |
| seen | yesterday | |
| stats | profile views | 297 |
A PhD student in Theoretical Quantum Optics at ICFO. Alumnus of Physics and Mathematics at the University of Warsaw. Interested in quantum optics & quantum information, applied optics and mathematical modeling in psychology. Dedicated to education of gifted schoolchildren (as both tutor and organizer). In free time enjoys photography, hiking and psychology (esp. cognitive science).
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May 6 |
comment |
Chiral (a)symmetry of curly hair (and fur) I know that microscopic chirality is not needed to explain curly hair. The question is whether it plays any role, e.g. in shifting the ratio of clockwise and counter-clockwise curly hair from 1:1. (Thanks for the link, anyway; too bad for me that it is under a paywall). |
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Apr 23 |
awarded | Notable Question |
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Apr 13 |
awarded | Benefactor |
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Apr 13 |
accepted | Below which temperature human muscles don't work? |
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Apr 10 |
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Below which temperature human muscles don't work? Thanks, especially for the last link. (I thought also about possibility that capillaries contract to much at lower temperatures, to support demand of muscles.) |
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Apr 10 |
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Chiral (a)symmetry of curly hair (and fur) Orders of magnitude difference of scale is not itself and argument against (see edit of my question). |
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Apr 10 |
revised |
Chiral (a)symmetry of curly hair (and fur) added 363 characters in body |
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Apr 8 |
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Chiral (a)symmetry of curly hair (and fur) @WYSIWYG Here keratin was only a guess. Chirality of intermediate fibers equally interesting to me. However the main question is: is proportion of left- and right-handed curly hair 1:1 in humans? |
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Apr 8 |
revised |
Chiral (a)symmetry of curly hair (and fur) added 1 characters in body |
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Apr 8 |
awarded | Promoter |
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Apr 8 |
revised |
Below which temperature human muscles don't work? added 147 characters in body |
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Apr 8 |
asked | Chiral (a)symmetry of curly hair (and fur) |
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Dec 17 |
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Is warmth/temperature sensed linearly or on a different scale? Could you precise 'linearly'? In general, it is not a well-defined thing, when it comes to perception, see cogsci.stackexchange.com/questions/1751/… |
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Dec 15 |
awarded | Yearling |
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Dec 11 |
awarded | Quorum |
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Oct 30 |
awarded | Popular Question |
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Aug 21 |
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Why did life not evolve to use radio? See electrocommunication, weakly electric fish and Mormyridae. They use 500 Hz electric sine signals (however, AFAIK using conductance of water, not - electromagnetic waves). |
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Aug 17 |
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Why did life not evolve to use radio? A good point with amplification. For radio you want sine-wave amplifiers, not cascade amplifiers, so here there may be a problem as well. However, the first step is to have good wires... |
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Aug 16 |
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Why did life not evolve to use radio? Thermal noise is devastating for molecular devices, as detectors/emitters (two-level systems) are all the time saturated (so e.g. a photon has the same probability of being absorber and to steal excitation). For macroscopic currents there is no such mechanism and one can easily go beyond the thermal noise (so for animals its only a technical problem of getting good enough conductors and generators of high frequencies). Moreover, AFAIK water absorbs most of radio waves (it's why submarines use sonars, not - radars), so radio communication would work only for land animals. |
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Aug 15 |
awarded | Nice Answer |
