814 reputation
521
bio website migdal.wikidot.com/en
location Castelldefels, Spain
age 28
visits member for 2 years, 4 months
seen Mar 29 at 18:11

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).


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).
Apr
10
comment 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.)
Apr
10
comment 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).
Apr
8
comment 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?
Dec
17
comment 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/…
Aug
21
comment 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).
Aug
17
comment 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...
Aug
16
comment 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.
Aug
15
comment Why did life not evolve to use radio?
You don't need a lot of energy to communicate anything. Anyway, radio and wifi works, so it's not a good argument.
Jul
20
comment How does the brain's energy consumption depend on mental activity?
I found Does Thinking Really Hard Burn More Calories? - Scientific American going in the same way - "Unlike physical exercise, mental workouts probably do not demand significantly more energy than usual. Believing we have drained our brains, however, may be enough to induce weariness".
Jun
28
comment Epilepsy explained by computational neuroscience
@ArtemKaznatcheev Yes, as long as one does not need to read one's life story before the actual question. Personally I am irritated by 'questions' in which I need to search for the actual question.
May
28
comment What is the similarity between how cells organize themselves to form a human and how humans organize themselves to form a society?
There are lot of similarities at different scales (say, from molecules to the whole ecosystem). However, making a "dictionary" based on one's common sense may be very misleading, unless one can support it with numerical or experimental data. Moreover, people like "telling stories" and while some analogies (or metaphors) can be good for the purpose of didactics, not necessary they go further. Compare with: trees are humans, forests are cities, ... - while it can make a good talk (e.g. comparing complex ecosystems), most of the corollaries don't work.
May
26
comment Below which temperature human muscles don't work?
I am not talking about anything damaging, rather about a common experience for anyone doing winter sports, or even hiking in the rain.
May
26
comment Below which temperature human muscles don't work?
Nice, but a quick skim says that they showed only small deviations. I am the most interested when muscles strength is only fraction (say, <25%) of the maximal one, or they are not working at all.
May
23
comment Does becoming martyr have an evolutionary advantage?
If it does not pay on genetic level (as they die, perhaps without offsprings), it may be beneficial on memetic level - i.e. spread (or defend) the idea of country, religion, ideology etc. I does not even need to give any (genetical) advantage to others.
May
22
comment Epilepsy explained by computational neuroscience
To meet the standards of SE please consider concentrating on asking a well-pointed question (not on personal story, urgency, ...).
May
17
comment What are the positive and negative effects of insulin on cognitive function?
And the question is?
May
6
comment How much does a human brain's metabolic rate vary?
Related: biology.stackexchange.com/questions/839/…
Mar
20
comment What is the evolutionary advantage of death?
Cancer does hurt human's reproductive success; and evolution does fight with it.
Mar
9
comment Do white Australians have a distinct look?
@SonnyOrdell Yes, it is a general case and here is nothing special about Australians. Perhaps there is something special about Caucasian Australians but I doubt.