🎓 Doc Freemo 🇳🇱 @freemo@qoto.org

My mom spent the whole day with me while I cleaned the Organic Chemistry lab. Also some important chemicals came in.

I know I keep promising this but I'm getting very close to being able to demonstrate to everyone the semisynthesis of CBD to THC!

#Science #Chemistry #OChem #OrganicChemistry

Science Riddle of the Day:

What is the primary functional purpose of divots / dimples in a golf ball.

#Science #Physics

Do you guys know the story about Eurisko, one of the earliest Evolutionary Algorithms attempted, done back in the 80's by Lenat. An interesting bug had arisen that is both insightful and amusing.

The purpose of the problem is that it evolved new heuristics for some problem it is given and then try them to solve the problem. Heuristics that work would get a higher score and ones that dont get a lower score. Eventually it would learn which a re best and would try the heuristics in order on new problems to find solutions.

One day after a night of solving problems Lenat came in and noticed there was heuristic that scored 999 out of 1000, the highest score ever seen. Excited he tried to figure out what the heuristic was doing.

As it turns out the heuristic basically said "whenever a problem is solved add this heuristic to the list of heuristics used to generate the solution"

You can read about this bug, and the project in general in this book. See page 90 for specific reference to the bug:

https://users.cs.northwestern.edu/~mek802/papers/not-mine/Lenat_EURISKO.pdf

#Science #MachineLearning #AI #AGI #EvolutionaryComputing #Evolution #Programming #CS #ComputerScience #QotoJournal

"There is a very large number of stars in the galaxy, there's so many if you tried to name them, one a second, naming all the stars in our galaxy, I dont mean all the stars in the universe, just this galaxy here, it takes 3,000 years. Yet that isnt a very big number because if those stars were to drop one dollar bill on the earth during a year, each star dropping one dollar, they might take care of the deficit that is suggested for the United States" --Feynman

#science #Physics #Uspol #Astronomy

The full "Fun to Imagine" session done by the late great Dr. Feynman.

Please everyone watch this, even if your not a scientist or if you are. Its really easy to follow and this guy has a beautiful way of explaining things and gives a lot of important insights.

Everyone, please, take the time you wont regret this one:

https://youtu.be/P1ww1IXRfTA

#Science #Physics #QotoJournal #Feynman

If you never watched the clip about Dr. Feynman explaining the nature of a "why" question please watch this. It is probably one of the most important things a critical thinker could ever know if they dont already:

https://youtu.be/36GT2zI8lVA

#Science #Physics #Feynman #QOTOJournal

This video started a good discussion over on my friends feed. So far no one has answered it and I dont want to give away the answer to anyone else (please CW your answers) but the question is this:

Why is it when you burn a piece of steel wool it gets heavier, but if you burn a log it gets lighter.

#science #chemisty #physics

lawl

#Science #biology

I saw the following question on FB where I answered it Thought I'd share teh question and answer here:

How long it takes to absorb and re-emit a photon when an electron's trajectory gets changed?

----------------------

After a free electron in space is effected by a photon it will, as you suggested, accelerate. But after taht point it is no different than any other electron with a constant velocity moving through space.

Now for starters there is a fundemental mistake in your thinking. Free electrons can not absord a photon, not in the usual sense. The only way an electron can be effected by a photon is through compton scattering, in which case the electron will absorb part of a photon, change its wave length and the energy absorbed will cause some degree of recoil, so the electron will accelerate. After that point, as I said the electron will be no different than any other electron moving at constant velocity through space.

To answer your question as to when they will emmit a photon, well, just as they can not absorb photons in the free space, they also can not spontaniously emit them. What can happen however is inverse compton scattering. This is where a very fast (usually relativistic) electron interacts with a low energy photon and imparts some of its energy to the photon increasing the energy of the photon and ultimately slowing down the speed of the electron.

So the answer to your question is, never, or whenever the right photon comes by, whichever applies to the circumstances.

#Science #QED #QM #Quantum #QuantumMechanics #Physics

Someone hacked the security chip on a credit card in order to make a crystal radio out of it...

https://youtu.be/_z3KmFqtPXQ

#Science #QOTOJournal #ElectricalEngineering #HamRadio #Radio #RF #EE

The hexane just arrived for the CBD to THC synthesis lan ill be showing sometime later this week!

#Science #Chemistry #OrganicChemistry

When I read things like this my first thought is "Post hoc ergo propter hoc"?

While I do think cannabis may induce anxiety it could very well be that those prone to anxiety are the ones more likely to consume cannabis in the first place. there is no way of knowing from this set of data which direction the association goes.

this is why double-blind studies are always critical and any conclusions drawn from data that is not double-blind in nature should be considered highly suspect.

#science #cannabis #anxiety

Clarke's Three laws (#2 is my favorite):

1. When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.

2. The only way of discovering the limits of the possible is to venture a little way past them into the impossible.

3. Any sufficiently advanced technology is indistinguishable from magic.

#science #scifi

Jurassic park here we come!

https://www.earthlymission.com/28000-year-old-woolly-mammoth-cells-brought-back-to-life-by-scientists/

#Science #Biology

Everyone, share with me your favorite STEM Textbooks! Bonus points if it has a sexy formatting/typesetting :)

#Science #Stem

Which STEM Professional organizations do you all belong to that publish a peer-reviewed journal, and share if you have published or contributed to the peer review journal before...

I'll start.

I am a member of the following:

IEEE
ACM
ASIS&T

I have collaborated on papers and contributed to the peer review process before.

#Science #STEM

What a cool demonstration of the differences!

#Science #medical #medicine #physics

I think I want to refresh my Quantum Mechanics skills.I have a text book "The mathematics of Quantum Mechanics" that I am tempted to go over. Its been a few years since I did any QM seriously and I think I lost some of my understanding.

#Math #maths #mathematics #physics #science #QM #QuantumMechanics

Sometimes it helps to get a little perspective

#Science #space #astronomy #mars

If I do a demonstration on how to convert CBD into THC (semisynthesis) what would be the most interesting way for me to present that?

#Chemistry #science