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  </channel><item rdf:about="https://www.scientificamerican.com/article/dark-matter-black-holes-could-fly-through-the-solar-system-once-a-decade/">
    <title>Dark Matter Black Holes Could Fly through the Solar System Once a Decade | Scientific American</title>
    <dc:date>2024-09-27T23:07:58+00:00</dc:date>
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    <title>New material looks like frosted glass but lets in more light than a window | Popular Science</title>
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<item rdf:about="https://3.basecamp.com/3671212/buckets/7351439/messages/5453215373#__recording_5453217631">
    <title>• 😢 Nearby LED lights flickering?</title>
    <dc:date>2024-03-02T17:59:44+00:00</dc:date>
    <link>https://3.basecamp.com/3671212/buckets/7351439/messages/5453215373#__recording_5453217631</link>
    <dc:creator>WimLeers</dc:creator><description><![CDATA[Let me give everyone the best information I can.

The DE1 turns on the heaters on individual cycles, but is extremely careful to only turn on or off the heater when the AC sinusoid is crossing the "zero" point. This is the best possible way to turn on a heater, from an electrical interference perspective:
 A heater is turned on as the AC cycles passes through zero, meaning the voltage across the heater is zero. 
With a completely resistive load, the voltage and current are perfectly in phase, so the current across the heater is also zero. A heater such as ours is almost completely a resistive load, as the low resistance of the heater swamps any other effects.
As the voltage across the load increases, so does the current. This means that the voltage and current both smoothly increase over time.
If, for example, the heater was turned on at the peak of the AC voltage, the current would increase to the peak value in a fraction of a cycle. This would imply a very sudden and high current draw on the AC supply. This would cause sudden voltage drops or switching noise on the AC supply.

BUT, there are LED lights now that don't work the same way as incandescent bulbs:
In the "old" days, dimming was achieved by chopping up the AC sinusoid being fed to incandescent bulbs, so that they received less power on average, and thus decreased the light output of the bulbs. The resulting waveforms looked like this:
Zoom image.png
image.png 120 KB View full-size Download
LED lights tend to fire erratically in the presence of modified AC waveforms, unless they have specific compensation circuitry, and there are many approaches out there for compensation. See, for example https://www.edn.com/how-to-make-led-bulbs-dimmable/
LED light circuits are extremely cost optimized. They will make a change to scrape a penny off the bill of materials. They only test against standard dimming circuits in somewhat ideal conditions. "Dimmable" is a word marketing like to throw around, and it gets variable amounts of lip service.
LED lights are often actually flickering at twice the AC frequency (so, 120 or 100 Hz), and are not on constantly. Anything that disrupts this constant stream of on/off/on/off is immediately noticed by the eye.
Looking at the EDN link above, the LED loads are quite capacitive, meaning that the voltage and current loads are no longer in phase.

Indeed, LED lights often have a very bad power factor. See https://blog.1000bulbs.com/home/power-factor-explained

Put another way, LED lights do not consume their power such that the voltage is in phase with the current.

If you have a bunch of capacitive lights hooked up to your power, then the current and voltage are probably not in phase.

(Screenshots snaffled from https://www.electronics-tutorials.ws/accircuits/ac-resistance.html)

Here is what the voltage and current look like on an AC circuit, with a resistive load (like a heater).

 Zoom image.png
image.png 89.5 KB View full-size Download

Here is an inductive load, like a vacuum motor:
 Zoom image.png
image.png 101 KB View full-size Download

And here is a capacitive load, like a large number of LED lights:
 Zoom image.png
image.png 103 KB View full-size Download

My theory:
Note that it is just a theory. I'm not asserting this as the final answer.

Imagine you have a house with LED lighting. The lights are heavily cost optimized and have a power factor of 0.5 to 1, and they thus show up as a capacitive load. So, while the lights are on, and nothing else is happening, the current wants to lead the voltage.

This is what happens:
The DE1 turns on a heater. 
Suddenly there is a very low impedance RESISTIVE load on the network. The capacitive load of the LEDs is swamped by comparison.
The current draw on the house supply is immediately forced into phase with the voltage.
The DE1 turns off a heater.
The LED lights can reassert themselves and the current starts leading the voltage again.
The low-cost input circuits on the LED lights were designed on the assumption that the current and voltage phase difference to be somewhat constant. This isn't the case, and they fire erratically.
So, why doesn't this happen in all houses, assuming all houses had bad LED lights? Well, it's a function of the power supply to the house. Just because the current draw is not in phase with the voltage draw in your lights, doesn't mean that other devices in the house should be affected. If another device requests power, it should get it with the current and voltage in phase. This assumes a perfect supply.

But, if, at the breaker box, or in the transformer feeding power to your house, or the cable to your house, you have enough resistance and inductance, the actual feed to the house can be affected. Changing the phase relationship between the current and voltage downstream of enough inductance and resistance, will actually change the voltage and current available to all devices on that supply. It won't just droop. It will bounce around.

It's not just a potential voltage droop as the heater draws more power. That would be the result of a resistance in the house supply. It could be a voltage spike or dip caused by the current phase changing, because the house supply is almost always somewhat inductive. This could happen even if the house is wired "correctly".

So, there isn't a quick and easy fix, necessarily. 

In summary, problems are exacerbated by any of the following, and only some might be fixable.
House wiring is just flat out incorrect (eg. Swapped live and neutral somewhere. Bad ground. Bad connection on live or neutral. Etc.)
House wiring is resistive. For example, a bad connection on the input of the breaker box. All downstream connections to that breaker box experience a voltage drop on high load.
House supply is resistive. High loads cause a voltage droop. Voltage recovers to correct voltage when draw is removed.
House supply is inductive. High loads cause a voltage droop initially that quickly recovers. Voltage often spikes far above the correct voltage when draw is removed.
House wiring is inductive. This could be the result of long wires, or even weird things like transformers that are technically off, but have large primary coils connected on one side, with the other side disconnected.
LED lights with a poor power factor.
Concurrent inductive and capacitive loads powered at the same time in a house that doesn't have a perfect supply. Switching one on/off will affect the other. Switching on a resistive load will affect both.
LED lights with drive circuits that fire erratically when the voltage fluctuates, rather than just providing smooth output the matches the average amount of power provided to the light.
I think, assuming that there isn't a terrible bad connection in the power supply somewhere, your best bet is to find very high quality LED lights. But, we have no way of judging which lights would be high quality. They are either untested, or barely good enough to deal with some current dimmers. The amount of effort put in by the design engineer isn't necessarily reflected in the price or the marketing.

Surprisingly, "dimmable" LED lights might actually be the best bet to prevent flicker, as they have at least some attempt in their circuitry to deal with non-ideal input waveforms. But, we're in a grey area, and I have no idea what circuits are actually being used in retail LED lights.

Also, having some good quality LED lights isn't guaranteed to help you if another batch in the house are messing with the power factor.

It seems to me that there might be a market out there for a box that you wire in series or parallel with a circuit that exclusively has lights on it, specifically to smooth their supply.

Finally, electricians tend to think in terms of resistance only. They think in terms of "high draw = drop in voltage". But that's less than half the story. I doubt you could find an electrician who would be able to measure the inductance of your house supply.

I'm actually quite impressed by  Michael Sojka Michael 's electrician friend. He is right that you could get magnetic coupling into an adjacent low power circuit. This would occur in any place where wires are run next to each other, so probably in the walls. I have actually seen cases of LED lights that won't turn off, because they are being powered purely by power being coupled into them from adjacent circuits. I doubt most electricians would consider this. 

(Also, please don't get confused between EMI from LED lights getting into the GHC, and LED lights flickering in general. They are completely different and unrelated effects.)]]></description>
<dc:subject>led electricity coffee energy physics</dc:subject>
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    <title>A Room-Temperature Superconductor? New Developments | Science | AAAS</title>
    <dc:date>2023-08-06T09:42:28+00:00</dc:date>
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    <title>Science girl on Twitter</title>
    <dc:date>2021-10-08T10:35:24+00:00</dc:date>
    <link>https://twitter.com/gunsnrosesgirl3/status/1442883403704057863</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>science physics nature</dc:subject>
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    <title>‘We kunnen het probleem van kernafval oplossen’ | De Tijd</title>
    <dc:date>2021-01-14T14:29:07+00:00</dc:date>
    <link>https://www.tijd.be/ondernemen/chemie/We-kunnen-het-probleem-van-kernafval-oplossen/10274678</link>
    <dc:creator>WimLeers</dc:creator><description><![CDATA[RT @italbers: Met een onderzoeksreactor die 1,6 miljard euro zal kosten, wil Hamid Aït Abderrahim in Mol nieuwe kankerbehandelingen ontwikkelen en kernafval ‘kapotschieten’. Fascinerend #vooruitgangsoptimisme  door @TobeSteel]]></description>
<dc:subject>belgium physics 2021 energy history science nuclear climatechange</dc:subject>
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    <title>1301607466220818435</title>
    <dc:date>2020-09-04T18:28:37+00:00</dc:date>
    <link>https://twitter.com/Myrmecos/status/1301607466220818435</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics covid19</dc:subject>
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    <title>Science Ambassador op Twitter: &quot;Sala is a high school senior from Virginia who will study engineering tuition-free at Stanford this fall. Sala was selected as the scholarship winner for her outstanding application video on angular momentum, which you can </title>
    <dc:date>2020-04-28T08:38:47+00:00</dc:date>
    <link>https://twitter.com/CAH_Science/status/1254812071839043584</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics funny</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:f9ce3d737c9c/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:funny"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://writings.stephenwolfram.com/2020/04/finally-we-may-have-a-path-to-the-fundamental-theory-of-physics-and-its-beautiful/">
    <title>Finally We May Have a Path to the Fundamental Theory of Physics… and It’s Beautiful—Stephen Wolfram Writings</title>
    <dc:date>2020-04-15T21:08:19+00:00</dc:date>
    <link>https://writings.stephenwolfram.com/2020/04/finally-we-may-have-a-path-to-the-fundamental-theory-of-physics-and-its-beautiful/</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>stephenwolfram physics</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:8e7e2098bf4d/</dc:identifier>
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	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://www.wetenschapuitgedokterd.be/zonnepanelen-ramen">
    <title>Zonnepanelen in ramen | Wetenschap uitgedokterd</title>
    <dc:date>2020-03-21T20:50:11+00:00</dc:date>
    <link>https://www.wetenschapuitgedokterd.be/zonnepanelen-ramen</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>solar energy electricity physics research 2020 imec</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:370f3976fd65/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:solar"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:energy"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:electricity"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:research"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:2020"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:imec"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://www.wetenschapuitgedokterd.be/kan-je-een-smartphone-bouwen-van-bacterien">
    <title>Kan je een smartphone bouwen van bacteriën? | Wetenschap uitgedokterd</title>
    <dc:date>2020-03-21T20:47:47+00:00</dc:date>
    <link>https://www.wetenschapuitgedokterd.be/kan-je-een-smartphone-bouwen-van-bacterien</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>robinbonne bacteria biology electronics physics 2020 science research uhasselt</dc:subject>
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	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:biology"/>
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	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:2020"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:science"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:research"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:uhasselt"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://arstechnica.com/science/2020/03/long-narrow-wires-carry-heat-without-little-resistance/">
    <title>Long narrow wires carry heat with little resistance | Ars Technica</title>
    <dc:date>2020-03-21T19:26:15+00:00</dc:date>
    <link>https://arstechnica.com/science/2020/03/long-narrow-wires-carry-heat-without-little-resistance/</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:51ee2c86a9a5/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/neiltyson/status/1233808998647898113">
    <title>Neil deGrasse Tyson op Twitter: &quot;The Leap Day alone overcorrects the calendar, requiring we remove a Leap Day every century year. But that under-corrects the calendar, requiring we put a Leap Day back in, every four centuries. Behold the Gregorian Calen</title>
    <dc:date>2020-03-06T09:36:20+00:00</dc:date>
    <link>https://twitter.com/neiltyson/status/1233808998647898113</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>time calendar physics astronomy neildegrassetyson quotes</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:034d9797ff22/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:time"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:calendar"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:astronomy"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:neildegrassetyson"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:quotes"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://phys.org/news/2019-11-spiders-ants-metal-wont.html">
    <title>Spiders and ants inspire metal that won't sink</title>
    <dc:date>2019-11-08T14:23:21+00:00</dc:date>
    <link>https://phys.org/news/2019-11-spiders-ants-metal-wont.html</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:52286d570e74/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/jaredhead/status/1177737536040390657">
    <title>Bring back 90’s Big Beat music you COWARDS on Twitter</title>
    <dc:date>2019-10-05T09:25:46+00:00</dc:date>
    <link>https://twitter.com/jaredhead/status/1177737536040390657</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:42a6d87dc666/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/41Strange/status/1178764929735639040">
    <title>41 Strange on Twitter</title>
    <dc:date>2019-10-01T07:55:52+00:00</dc:date>
    <link>https://twitter.com/41Strange/status/1178764929735639040</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>russia nature physics climatechange</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:aed3c6ea7c21/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:russia"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:nature"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:climatechange"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://www.theatlantic.com/science/archive/2018/07/the-electric-flight-of-spiders/564437/">
    <title>Spiders Can Fly Hundreds of Miles Using Electricity</title>
    <dc:date>2019-10-01T05:53:35+00:00</dc:date>
    <link>https://www.theatlantic.com/science/archive/2018/07/the-electric-flight-of-spiders/564437/</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>nature spiders physics</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:1e360cb09ddd/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:nature"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:spiders"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/detly/status/1172292736008876033">
    <title>Jason Heeris &amp; 1247 others on Twitter</title>
    <dc:date>2019-09-13T22:06:09+00:00</dc:date>
    <link>https://twitter.com/detly/status/1172292736008876033</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>education parenting physics aw</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:77cae254f89d/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:education"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:parenting"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:aw"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/fermatslibrary/status/1161614701656252417">
    <title>Fermat's Library op Twitter: &quot;Here's why the sun turns red near the sunset on Earth… &quot;</title>
    <dc:date>2019-08-16T06:43:37+00:00</dc:date>
    <link>https://twitter.com/fermatslibrary/status/1161614701656252417</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics aw</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:2f207ba3f0eb/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:aw"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/Rainmaker1973/status/1156157574531751938">
    <title>Massimo op Twitter: &quot;This cotton candy guy's wizardry is actually a brilliant application of the dynamics of vortices in fluids https://t.co/16o3stIhe3… https://t.co/zQNMEeEBuk&quot;</title>
    <dc:date>2019-07-31T08:31:44+00:00</dc:date>
    <link>https://twitter.com/Rainmaker1973/status/1156157574531751938</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics funny video aw</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:4bf92ed2e981/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:funny"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:video"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:aw"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/ZonePhysics/status/1138501609997131776">
    <title>Physics &amp; Astronomy Zone op Twitter: &quot;Best Demonstration inertia ever ....… &quot;</title>
    <dc:date>2019-06-16T17:20:58+00:00</dc:date>
    <link>https://twitter.com/ZonePhysics/status/1138501609997131776</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics gif</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:3c8b3eeb186a/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:gif"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://blogs.sciencemag.org/pipeline/archives/2019/06/11/google-investigates-cold-fusion">
    <title>Google Investigates Cold Fusion</title>
    <dc:date>2019-06-16T16:37:22+00:00</dc:date>
    <link>https://blogs.sciencemag.org/pipeline/archives/2019/06/11/google-investigates-cold-fusion</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics nuclear energy fusion google science 2019</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:3a563be0da9b/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:nuclear"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:energy"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:fusion"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:google"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:science"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:2019"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/housetrotter/status/1131315615313141765">
    <title>ben on Twitter</title>
    <dc:date>2019-05-25T05:21:58+00:00</dc:date>
    <link>https://twitter.com/housetrotter/status/1131315615313141765</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>wireless weather forecast algorithms physics water epicfail 2019</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:8887adb3f944/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:wireless"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:weather"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:forecast"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:algorithms"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:water"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:epicfail"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:2019"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://mobile.twitter.com/TProphet/status/1127258067261952000">
    <title>(5) TProphet on Twitter: &quot;1/ We use GPS every day but most of us only have a vague idea of how it works. Turns out it's really complicated. I met the engineer who maintains one small piece of the global network here in The Seychelles.&quot; / Twitter</title>
    <dc:date>2019-05-20T22:35:42+00:00</dc:date>
    <link>https://mobile.twitter.com/TProphet/status/1127258067261952000</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>gps algorithms physics</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:3d3c59f85c66/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:gps"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:algorithms"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://medium.com/s/story/the-future-of-computing-is-analog-e758471fbfe1">
    <title>The Future of Computing Is Analog – Member Feature Stories – Medium</title>
    <dc:date>2019-02-23T07:58:41+00:00</dc:date>
    <link>https://medium.com/s/story/the-future-of-computing-is-analog-e758471fbfe1</link>
    <dc:creator>WimLeers</dc:creator><description><![CDATA[<blockquote>
Nature uses digital coding for the storage, replication, and recombination of sequences of nucleotides but relies on analog computing, running on nervous systems, for intelligence and control. The genetic system in every living cell is a stored-program computer. Brains aren’t.
Digital computers execute transformations between two species of bits: bits representing differences in space and bits representing differences in time. The transformations between these two forms of information, sequence and structure, are governed by the computer’s programming, and as long as computers require human programmers, we retain control.
Analog computers also mediate transformations between two forms of information: structure in space and behavior in time. There is no code and no programming. Somehow — and we don’t fully understand how — nature evolved analog computers known as nervous systems, which embody information absorbed from the world. They learn. One of the things they learn is control. They learn to control their own behavior, and they learn to control their environment to the extent that they can.
</blockquote>

<blockquote>
here are three laws of artificial intelligence. The first, known as Ashby’s law, after cybernetician W. Ross Ashby, author of Design for a Brain, states that any effective control system must be as complex as the system it controls.
The second law, articulated by John von Neumann, states that the defining characteristic of a complex system is that it constitutes its own simplest behavioral description. The simplest complete model of an organism is the organism itself. Trying to reduce the system’s behavior to any formal description makes things more complicated, not less.
The third law states that any system simple enough to be understandable will not be complicated enough to behave intelligently, while any system complicated enough to behave intelligently will be too complicated to understand.
</blockquote>]]></description>
<dc:subject>computing history computerscience nature biology physics intelligence ai socialnetworking</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:664a75821324/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:computing"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:history"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:computerscience"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:nature"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:biology"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:intelligence"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:ai"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:socialnetworking"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/drewthaler/status/1097759293070237697">
    <title>Drew Thaler on Twitter</title>
    <dc:date>2019-02-19T08:01:52+00:00</dc:date>
    <link>https://twitter.com/drewthaler/status/1097759293070237697</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:0e422b296a3c/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://m.phys.org/news/2019-02-reverse-cool-future.html">
    <title>Running an LED in reverse could cool future computers</title>
    <dc:date>2019-02-18T22:44:19+00:00</dc:date>
    <link>https://m.phys.org/news/2019-02-reverse-cool-future.html</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics light led</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:34946673b085/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:light"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:led"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/MonicaBeletsky/status/1095164903839522816">
    <title>Monica Beletsky on Twitter</title>
    <dc:date>2019-02-12T21:19:52+00:00</dc:date>
    <link>https://twitter.com/MonicaBeletsky/status/1095164903839522816</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>einstein physics sexism</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:3ca36304036a/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:einstein"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:sexism"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="https://twitter.com/kinkybambou/status/1088408966923780096">
    <title>Dr Xanax la Guerrière on Twitter</title>
    <dc:date>2019-01-30T21:27:30+00:00</dc:date>
    <link>https://twitter.com/kinkybambou/status/1088408966923780096</link>
    <dc:creator>WimLeers</dc:creator><dc:subject>physics funny</dc:subject>
<dc:identifier>https://pinboard.in/u:WimLeers/b:e7136dc3a8a7/</dc:identifier>
<taxo:topics><rdf:Bag>	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:physics"/>
	<rdf:li rdf:resource="https://pinboard.in/u:WimLeers/t:funny"/>
</rdf:Bag></taxo:topics>
</item>
<item rdf:about="http://m.esa.int/Our_Activities/Space_Science/Mars_Express/Mars_Express_gets_festive_A_winter_wonderland_on_Mars">
    <title>Mars Express gets festive: A winter wonderland on Mars</title>
    <dc:date>2018-12-21T08:03:56+00:00</dc:date>
    <link>http://m.esa.int/Our_Activities/Space_Science/Mars_Express/Mars_Express_gets_festive_A_winter_wonderland_on_Mars</link>
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