Group items tagged Power - Advanced Concepts Team

China plans to launch a constellation of AI-powered satellites - 6 views

www.artificialintelligence-news.com/...ch-constellation-ai-satellites

AI constellations

shared by darioizzo2 on 09 Jul 19 - No Cached

darioizzo2 on 09 Jul 19

MEGA CONSTELLATION and AI ... China again :)

<div class="cArrow"> </div><div class="cContentInner">MEGA CONSTELLATION and AI ... China again :)</div>

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LeopoldS on 09 Aug 19

and we did not even propose it ...

<div class="cArrow"> </div><div class="cContentInner">and we did not even propose it ...</div>

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Power generation from ambient humidity using protein nanowires | Nature - 0 views

www.nature.com/...s41586-020-2010-9

NRG technology bio

shared by Marcus Maertens on 19 Feb 20 - No Cached

Marcus Maertens on 19 Feb 20

Sounds juicy...

<div class="cArrow"> </div><div class="cContentInner">Sounds juicy...</div>

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The Whorfian Time Warp: Representing Duration Through the Language Hourglass. - 0 views

psycnet.apa.org/?&fa=main.doiLanding&doi=10.1037/xge0000314

shared by Alexander Wittig on 04 May 17 - No Cached

Alexander Wittig on 04 May 17

How do humans construct their mental representations of the passage of time? The universalist account claims that abstract concepts like time are universal across humans. In contrast, the linguistic relativity hypothesis holds that speakers of different languages represent duration differently. The precise impact of language on duration representation is, however, unknown. Here, we show that language can have a powerful role in transforming humans' psychophysical experience of time. Contrary to the universalist account, we found language-specific interference in a duration reproduction task, where stimulus duration conflicted with its physical growth. When reproducing duration, Swedish speakers were misled by stimulus length, and Spanish speakers were misled by stimulus size/quantity. These patterns conform to preferred expressions of duration magnitude in these languages (Swedish: long/short time; Spanish: much/small time). Critically, Spanish-Swedish bilinguals performing the task in both languages showed different interference depending on language context. Such shifting behavior within the same individual reveals hitherto undocumented levels of flexibility in time representation. Finally, contrary to the linguistic relativity hypothesis, language interference was confined to difficult discriminations (i.e., when stimuli varied only subtly in duration and growth), and was eliminated when linguistic cues were removed from the task. These results reveal the malleable nature of human time representation as part of a highly adaptive information processing system.

<div class="cArrow"> </div><div class="cContentInner">How do humans construct their mental representations of the passage of time? The universalist account claims that abstract concepts like time are universal across humans. In contrast, the linguistic relativity hypothesis holds that speakers of different languages represent duration differently. The precise impact of language on duration representation is, however, unknown. Here, we show that language can have a powerful role in transforming humans' psychophysical experience of time. Contrary to the universalist account, we found language-specific interference in a duration reproduction task, where stimulus duration conflicted with its physical growth. When reproducing duration, Swedish speakers were misled by stimulus length, and Spanish speakers were misled by stimulus size/quantity. These patterns conform to preferred expressions of duration magnitude in these languages (Swedish: long/short time; Spanish: much/small time). Critically, Spanish-Swedish bilinguals performing the task in both languages showed different interference depending on language context. Such shifting behavior within the same individual reveals hitherto undocumented levels of flexibility in time representation. Finally, contrary to the linguistic relativity hypothesis, language interference was confined to difficult discriminations (i.e., when stimuli varied only subtly in duration and growth), and was eliminated when linguistic cues were removed from the task. These results reveal the malleable nature of human time representation as part of a highly adaptive information processing system.</div>

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[1107.0167] Nonlinear transformation optics and engineering of the Kerr effect - 9 views

arxiv.org/1107.0167

PHY nan optics metamaterials

shared by Luzi Bergamin on 04 Jul 11 - No Cached

LeopoldS liked it

Luzi Bergamin on 04 Jul 11

The best paper on transformation optics written ever :-)

<div class="cArrow"> </div><div class="cContentInner">The best paper on transformation optics written ever :-)</div>

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...2 more comments...
jmlloren on 05 Jul 11

Finally something worth to read in the MM field!. The idea is excellent, congratullations. However, I think there is a typo or mistake in the definition of l=3x10-13 m, the "waist" of the laser beam. Seems clear that 0.3 pm is too small for being a waist of any laser beam.

<div class="cArrow"> </div><div class="cContentInner">Finally something worth to read in the MM field!. The idea is excellent, congratullations. However, I think there is a typo or mistake in the definition of l=3x10-13 m, the "waist" of the laser beam. Seems clear that 0.3 pm is too small for being a waist of any laser beam.</div>

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Luzi Bergamin on 05 Jul 11

Thanks for your commendation. Of course, the problem with nonlinear transformation optics is the same as with linear: it's very easy to come up with theoretical descriptions of devices that have the most absurd properties, but it will be extremely hard to fabricate them. But if you have any good suggestion, please shoot! About the laser beam: Pekka made the simulations, since I am not a "Comsolist", but still I think the numbers are correct. You are right that we should not call this a laser beam. Our problem was the following: we need to have a very simple model that can be simulated exactly (full Maxwell equations) but naturally exhibits self focusing. The Gaussian beam was the simplest solution. Since our model is purely classical and moreover we do not take into account diffraction effects, the parameter "l" is of minor importance. Taking "l" much larger gives almost the same picture but requires much more computer power to simulate. I guess that's why Pekka chose an unnaturally small number.

<div class="cArrow"> </div><div class="cContentInner">Thanks for your commendation. Of course, the problem with nonlinear transformation optics is the same as with linear: it's very easy to come up with theoretical descriptions of devices that have the most absurd properties, but it will be extremely hard to fabricate them. But if you have any good suggestion, please shoot! About the laser beam: Pekka made the simulations, since I am not a "Comsolist", but still I think the numbers are correct. You are right that we should not call this a laser beam. Our problem was the following: we need to have a very simple model that can be simulated exactly (full Maxwell equations) but naturally exhibits self focusing. The Gaussian beam was the simplest solution. Since our model is purely classical and moreover we do not take into account diffraction effects, the parameter "l" is of minor importance. Taking "l" much larger gives almost the same picture but requires much more computer power to simulate. I guess that's why Pekka chose an unnaturally small number.</div>

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jmlloren on 05 Jul 11

Concerning the fabrication... as usual, no idea. I agree that this is the main drawback of MM, and certainly difficult to overcome. I would double check that number, because its value is related with the beam shape of Fig. 1 A. I believe that the simulations are correct, it's just a detail.

<div class="cArrow"> </div><div class="cContentInner">Concerning the fabrication... as usual, no idea. I agree that this is the main drawback of MM, and certainly difficult to overcome. I would double check that number, because its value is related with the beam shape of Fig. 1 A. I believe that the simulations are correct, it's just a detail.</div>

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LeopoldS on 06 Jul 11

wow ... still publishing despite babysitting and new job!!

<div class="cArrow"> </div><div class="cContentInner">wow ... still publishing despite babysitting and new job!!</div>

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DARPA Advanced Plant Technologies project - 2 views

events.sa-meetings.com/...632471

technology BIO plants?

shared by jaihobah on 22 Nov 17 - No Cached

jaihobah on 22 Nov 17

" The goal of the APT program is to control and direct plant physiology to detect chemical, biological, radiological, and/or nuclear threats, as well as electromagnetic signals. " Now that is an advanced concept...

<div class="cArrow"> </div><div class="cContentInner">" The goal of the APT program is to control and direct plant physiology to detect chemical, biological, radiological, and/or nuclear threats, as well as electromagnetic signals. " Now that is an advanced concept...</div>

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LeopoldS on 04 Jan 18

and look at this exceptional insight: "plants are easily deployed, self-powering, and ubiquitous in the environment, and the combination of these native abilities with specifically engineered sense-and-report traits will produce sensors occupying new and unique operational spaces" :-)

<div class="cArrow"> </div><div class="cContentInner">and look at this exceptional insight: "plants are easily deployed, self-powering, and ubiquitous in the environment, and the combination of these native abilities with specifically engineered sense-and-report traits will produce sensors occupying new and unique operational spaces" :-)</div>

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Russia reveals a formidable nuclear-powered space tug - 0 views

russianspaceweb.com/tem.html

NPS

shared by LeopoldS on 23 Sep 20 - No Cached

LeopoldS on 23 Sep 20

after many announcements, now some first design drawings ...

<div class="cArrow"> </div><div class="cContentInner">after many announcements, now some first design drawings ...</div>

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Light-induced reversal of ion segregation in mixed-halide perovskites | Nature Materials - 0 views

www.nature.com/...s41563-020-00826-y

SPS solar power PV

shared by LeopoldS on 21 Oct 20 - No Cached

LeopoldS on 21 Oct 20

Light-induced reversal of ion segregation in mixed-halide perovskites

<div class="cArrow"> </div><div class="cContentInner">Light-induced reversal of ion segregation in mixed-halide perovskites</div>

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