Discover and read the best of Twitter Threads about #physics

Most recents (24)

#CuratedTruth

"#Homoeopathy is a branch of universal #medicine based on the ‘principle of the like’ (Similia Similibus Curentur = Like treats Like) and in #minimum doses." .. I
It means that a #substance in a massive dose generates #pathological #symptomatology; has the possibility to #cure it, if applied in the #minimum doses obtained by #dilution and intense #agitation, in other words, #homoeopathic #succussion. .. II
#Homoeopathy is derived from a #Hippocratic #concept developed by the #German #physician, Samuel Hahnemann (1755–1843), with serially #diluted #medicines (1:9, 1:99, 1:999 and others) in water-ethanol vehicle alternating #dilution with #succussion. .. III
Read 28 tweets
Daily Bookmarks to GAVNet 6/29/2020-2

greeneracresvaluenetwork.wordpress.com/2020/06/29/dai…

How conspiracy theories emerge—and how their storylines fall apart

phys.org/news/2020-06-c…

#conspiracy #theories #fall
Artificial Intelligence Can't Deal With Chaos, But Teaching It Physics Could Help

sciencealert.com/teaching-artif…

#ArtificialIntelligence #physics #DynamicSystems #chaos #unpredictability
Yes, you should still go to the dentist. But be careful.

washingtonpost.com/health/2020/06…

#DentalCare #coronavirus #healthcare
Read 3 tweets
Who wants to see the #Diversity data for @STFC_Matters, that was released by @UKRI_News last week?

The full data release is here, so if you want to see anything for yourself, go ahead: ukri.org/about-us/equal…
@STFC_Matters funds research & training into astronomy, particle physics, space & planetary sciences & nuclear physics. This is important because @ukhesa only report STFC as #physics – it’s so much more!

STFC have a #equality & #diversity statement here: stfc.ukri.org/funding/promot…
So, let’s start with @STFC_Matters #ethnicity data.

Worth noting that @UKRI_News collate three categories; ethnic minority, white, not disclosed.

We can’t separate out different ethnicity, which is a problem in itself. Image
Read 68 tweets
Daily Bookmarks to GAVNet 6/18/2020-2

greeneracresvaluenetwork.wordpress.com/2020/06/18/dai…

Decision-Making in a Time of Crisis – O’Reilly

oreilly.com/radar/decision…

#DecisionMaking #crisis
Impacts of multiple stressors on freshwater biota across spatial scales and ecosystems | Nature Ecology & Evolution

nature.com/articles/s4155…

#impacts #scales #ecology #freshwater #ecosystems
Responsible Investment needs a bigger toolbox - Preventable Surprises

preventablesurprises.com/publications/b…

#investment #toolbox
Read 9 tweets
Daily Bookmarks to GAVNet 6/04/2020-2

greeneracresvaluenetwork.wordpress.com/2020/06/04/dai…

Graduate Student Solves Decades-Old Conway Knot Problem | Quanta Magazine

quantamagazine.org/graduate-stude…

#topology #Knot
What We Lose When We Assume People Are Bad : NPR

npr.org/2020/05/15/857…

#people #bad #SFI
Read 12 tweets
Daily Bookmarks to GAVNet 6/02/2020-2

greeneracresvaluenetwork.wordpress.com/2020/06/02/dai…

What COVID-19 Means For The Future Of Capitalism, Democracy And Sustainability

medium.com/volans/what-co…

#coronavirus #future #capitalism #democracy #Sustainability
U.S. COVID-19 Contact Tracing Programs Designed for Failure, Despite Bloomberg Money; Why Can't the U.S. Copy the Lessons of Hong Kong's Success? | naked capitalism

nakedcapitalism.com/2020/05/u-s-co…

#tracing #failure #contact #Bloomberg
Stretch and flow: Research sheds light on unusual properties of well-known materials

phys.org/news/2020-05-u…

#research #flow #materials #Stretch
Read 12 tweets
Daily Bookmarks to GAVNet 6/01/2020-2

greeneracresvaluenetwork.wordpress.com/2020/06/01/dai…

Daring Fireball: A Spectacularly Bad Washington Post Story on Apple and Google’s Exposure Notification Project

daringfireball.net/2020/05/washin…

#apple #notification #exposure #google #tracking
Girl, 12, survives heart failure tied to Kawasaki-like syndrome believed caused by coronavirus - The Washington Post

washingtonpost.com/health/2020/05…

#failure #coronavirus #syndrome #heart
Investigating neural mechanisms underlying individual differences in perception

medicalxpress.com/news/2020-05-n…

#neural #perception
Read 12 tweets
Daily Bookmarks to GAVNet 5/16/2020-2

Technique could enable cheaper fertilizer production

phys.org/news/2020-05-t…
#production #fertilizer
Four years of calculations lead to new insights into muon anomaly

phys.org/news/2020-05-y…
#anomaly #insights #calculations #physics
Researchers identify potential pathway to make opioids safer, more effective

medicalxpress.com/news/2020-05-p…
#opioids
Read 8 tweets
This is the color violet.

...actually it isn’t. In fact, it’s impossible to make this color appear on your screen.

And that’s just the tip of the iceberg. If you want to have your mind blown, keep reading. #physics #violet #colors #color #mindblown #tricks
Colors are the result of electromagnetic waves occurring in a specific “wavyness” as this image shows
Seen another way, the visible spectrum is the range of wavyness (wavelengths) that human eyes can see. Notice how violet is way off on the edge.
Read 22 tweets
1/12

Great talk by @stephen_wolfram introducing his Physics Project (wolframphysics.org)

Important work here; goes well-beyond physics. I hope upcoming generations of scientists pay close attention.

Some of my quick thoughts:
2/12

What is the qualifier for unification under this framework? How will QM and GR demonstrably work together enough to say they are unified"?
3/12

It would be great to have some distance metric between the shapes you create with this approach and known shapes in nature (some connection between the isomorphic classes of nature's shapes and those generated here).
Read 13 tweets
1/ Here is a proposal of how to distinguish between different, supposedly "equivalent," #orthogonal mixtures of photons. In this case, it is R + L mix of circular, to be distinguished from mixtures of linear #polarization.
#Physics #QuantumMechanics #ThoughtExperiment
I am leaving aside right here whether it could lead to #FTL communication (#SuperluminalSignalling), and focusing on the bare being able to make the distinction. Impractical - but of major theoretical importance.
#ProperMixtures #MeasurementProblem
We use a compound detector D for this purpose. Its first element is a quarter-wave plate with horizontal fast axis, that is rotationally free within a small angle (to allow measurement of changes in #angularmomentum of roughly a few hundred ħ, which is still very tiny.)
Read 14 tweets
aei.org/articles/the-2…

Extravagant success of Ashkenazi #Jews in wide range of intellectual domains serves as solid refutation to already exhausted #woke narrative of oppression, victimhood, & intersectionality. Why?/1

#IQ #psychology #intelligenceresearch #groupdifferences
"In the first half of the 20th century, despite pervasive and continuing social discrimination against Jews throughout the Western world, despite the retraction of legal rights, and despite the Holocaust, Jews won 14 % of Nobel Prizes in literature, chemistry, physics..."/2
"..., and medicine/physiology. In the second half of the 20th century, when Nobel Prizes began to be awarded to people from all over the world, that figure rose to 29 %. So far, in the 21st century, it has been 32 %. Jews constitute ~0.2 % of the world’s population."/3
Read 55 tweets
Fact: Laser warning systems/active protection is becoming common.

Question: should/can we move away from using laser range finders to generate ballistic solutions?

I have some ideas (below).

Seeking thoughts and or a sanity check from #TankTwitter and or #Physics legends.
We know Laser Range Finders work.

They probably also aren’t obsolete yet. But the days of being able to fire the laser without fear of being detected are potentially coming to a close.

So what other options are there?
Passive Radar (pt 1/3)

These systems will *likely* become more common. Ranging is literally part of the ‘radar’ acronym so that part is solved.

BUT. Passive radar needs the target to be transmitting/something else to transmit to enable the passive radar to receive.
Read 9 tweets
1. “The Death of a Universe” -- Terrific talk this evening by Dr. Katie Mack (@AstroKatie) at @yorkuniversity. Here are a few highlights. This of course is the CMB, the faint microwave “echo” of the big bang. (cont’d) #physics #astronomy #cosmology (@YorkUScience)
@AstroKatie @yorkuniversity @YorkUScience 2. The big bang happened ~13.8 billion years ago. So what lies ahead? Could the universe collapse in a big crunch? Maybe – but as Prof. Mack explained, it's more likely that it will keep expanding. In fact, the universe is currently not only expanding but also accelerating...
@AstroKatie @yorkuniversity @YorkUScience 3. We seem to live in a universe with a non-zero cosmological constant. Right now, the CC appears small – but in the far future, the CC could come to dominate. That won’t end well! At best, in that scenario, we’re going to freeze to death in the dark...
Read 8 tweets
TO SEE A WORLD IN A GRAIN OF SAND
AND A HEAVEN IN A WILD FLOWER
HOLD INFINITY IN THE PALM OF YOUR HAND
AND ETERNITY IN AN HOUR
-WILLIAM BLAKE
In the beginning was the logos, the Big Bang, the primordial OM. Image
Big Bang Theory says that the physical universe spiralled out of an unimaginably hot and dense single point called a ‘singularity’ billions of times smaller than the head of a pin.

It does not say why? Or how? Image
Read 68 tweets
#Disclosure

Jack Sarfatti, world-renowned theoretical physicist, has published a paper theorizing some tech to manipulate gravity, pointing to the construction of an anti-gravity-driven vehicle.

VERY important. This goes in the direction of those recently revealed… (cont. >)
(< follows) … U.S. Navy patents with the same objects.

It looks like a pattern of disclosure.

Thanks to @svalvolatovalvo

#Disclosure #DarkToLight
#UFO #SpaceForce #physics
Read 3 tweets
Controlling the speed and trajectory of evolution with counterdiabatic driving -- a TWEETORIAL 0/n #evolution #mathonco #mathevo #physics #quantumcomputing biorxiv.org/content/10.110…
#Evolution is the most fundamental biological *mechanism - and drives change over time across all the kingdoms of life. We are getting better and better at *predicting* its outcomes, and *harnessing it* (directed evolution), but we haven't previously had any *control* over it 1/n
in work w\ @D4N__ we took advantage of sequential application of selective pressures in a math model to *steer evolution* & relied on taking limits (as time -> infinity) to understand where populations equilibrated in genotype space 2/n journals.plos.org/ploscompbiol/a… @PLOSCompBiol
Read 13 tweets
The #phyphox app from @rwth_phyphox gives you direct access to the output of many #sensors in your smartphone. Next time you have a long ✈️flight, quantify turbulence or just check on your phone when the toilet rush is over. (Warning: #scicomm #physics thread ahead!👇) 1/n
Your #phone is full of #sensors (microphone, camera, temperature, GPS, light sensors, magnetometers,…), including air pressure sensors and accelerometers. The pressure at cruising altitude is about 80% of the pressure at sea level. 2/n
That’s why your crisps package expands after take-off and the empty plastic bottle appears auto-crushed after landing. The pressure sensor can be used to estimate elevation when being on earth. But it is so sensitive it feels when airplane toilets are flushed. 3/n
Read 9 tweets
Today's Applied Complexity Symposium begins with a panel on Computation and Complex Economies, feat. Rob Axtell, Joshua Epstein, @C4COMPUTATION, Blake LeBaron, John Miller, & @MelMitchell1

(Follow this thread for live coverage all day...)

#complexsystems #economics
4 Principles of Collective #Computation:

1 Ground truth (objective reality)
2 Effective ground truth (what we agree on, whether or not it is accurate)
3 #Information can be collectively encoded in #networks
4 Outputs are a product of collective dynamics

@C4COMPUTATION right now
"I think #economics really needs to adopt a generative framework with agent-based models of cognitively plausible software people...[and] we don't choose to fear."

- SFI'S Joshua Epstein (@GeorgeMasonU) on modeling emotions at today's ACtioN symposium:
Santafe.edu/action
Read 44 tweets
A running thread of things that @Twitter could do to unlock value for users. Will add to overtime. Please feel free to retweet and reply with your own, most of these below I have just taken and summarized from others. In no particular order. 1/♾ #JustKidding 🤔 or am I?
@Twitter I drafted a tweet on my phone but of course, can't access "draft's" on the desktop. So lets maybe start there. The desktop and @Tweetdeck version should be MORE robust than the mobile app not less. Tweetdeck, for example, has no bookmarks, emoji's, live video, polls, gif's, etc
@Twitter @TweetDeck There are SO MANY great meaningful quotes, threads, replies, and conversations that vanish into the Twitter ether, drowned out by hot takes, snark, and 280 character riffs on what some influencer or politician just did. Find a way to collect and resurface this treasure trove.
Read 80 tweets
1/ The Einstein Energy-Momentum Relation can be straightforwardly turned into the `Klein-Gordon Equation.` ✍🏽

Why’s that important?

The KG-Equation describes spinless particles of any charge! †
2/ If you use natural units (author’s note: ❤️) where ℏ = c = 1, and replace `E` and `p` for their quantum operators... ➡️
3/ You’ll find that the equation reduces to below.

Very serendipitiously, the *d’Alembertian* pops up and we can get a Lorentz-Invariant relativistic equation...
Read 10 tweets
So I'm at a physics conference this week in Lecce, Italy. Some of you wonder how that works given that I'm Deaf and probably don't know Italian Sign Language. Well... 1/N #deaf #interpreters #asl #access #physics
In most cases, I can just request ASL interpreters (yes, American Sign Language interpreters) months in advance. Who pays for it? Good question. That's something I've fortunately been mostly kept out of the loop on, rather than the discussions that happen at the conference! 2/N
But so we get terps set up months in advance, great. They're ASL, because I've barely had the chance to pick up any other language and it's my secondary mode of communication. ASL terps are hard to find in non-English speaking countries... UK too! UK uses BSL primarily. 3/N
Read 18 tweets
Modular, hierarchical, and information-processing:

Right now at SFI, biologists, physicists, neuroscientists, and computer scientists convene for a three-day workshop on Biological #Computation, organized by David Wolpert, @C4COMPUTATION, & @albert_kao.

santafe.edu/news-center/ne…
"A circular definition isn't worthless if the circle is big enough."

- @livcomp of @UNM at today's #biocomp workshop
"#Physics produces order through the minimization of #energy. Adaptive systems produce order through the addition of #information processing."

By why do biological systems compute, whereas classical physical systems apparently don't? @C4COMPUTATION on #function at #biocomp now:
Read 4 tweets
(Thread)

So frustrating to #know the answer to the question of how to formulate that #TheoryOfEverything #scientists say is the biggest unsolved problem in #physics, yet they don't even want to look at it:

tuks.nl/wiki/index.php…

Wave-particle duality a #mystery?
What I've found is rather astonishing:

The #mathematics used by #Maxwell are inconsistent.

He left the magnetic vector potential field [A] undefined and decoupled from the #medium thus creating #MaxwellsHole, which introduced an unwarrented #gauge #freedom in the model...
It is this #gauge #freedom thst led to the #hack known as #Quantum #Madness.

Really, it doesn't take a PhD to figure out that when you believe particles can exist at two places at the same time, you have a mental problem.

steemit.com/funny/@lamare/…
Read 20 tweets

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