BC SCIENCE
Saved by @Alex1Powell

All Biological life on earth is possible because of a discrete digital mechanism of preservation and replication.

 The mechanism of signaling between the superorganism we know of as bacteria and its ongoing war against viruses is through a digital mechanism.
The source of innovation in biology is in this milieu of microbiome and viromes that are ubiquitous in every complex multicellular organism on earth. Humans are walking ecologies and cannot survive stripped of these ecologies.
We can picture this as a cloud of digital interaction that surrounds all of us.
The cells of multicellular creatures however do not communicate in the same way as bacteria. The DNA of mammals are sequestered from daily activity so as to prevent wear and tear.
The lifespan of mammals are related to their metabolism. The faster a mammal's heart beats the less time it has to live. A multicellular creature degrades like an analog system with each iteration error is accumulated.
Death is inevitable for multicellular creatures because our bodies have similar dynamics as non-linear systems found in chaos theory. The attractors that lead to our existence can lead to chaos and thus death.
Fortunately, evolution has gifted us with some of the digital mechanisms that bacteria have. The immune system is digital in nature. The same system that protects us from bacteria and viruses is also the same system that corrects for errors in our bodies.
At higher scales, evolution creates species that are more analog. But there is a constant tension between the drive to become analog and the need for preservation and replication.
All biological creatures balance these opposing forces by leveraging what is known as code duality. Every system has both an analog part that meets with the world and a digital part that preserves itself against the world.
In biology, the stuff that interprets the digital code of RNA are analog devices. More specifically, mechanical and electrical nano-machines.
The molecular machinery that converts energy into motion and energy into sensing are a consequence of biological innovation happening at bacteria and viral level.
But what meets the reality of physics and chemistry are analog machines. Living things require analog machinery to interpret and act within the world. The language of reality at higher scales is an analog language.
But to scale in size any organism requires digital mechanisms. Therefore this code duality must exist at many scales in a complex organism.
A common idea about the brain is that it is a dynamical system. A dynamical system is unlike a digital system like a computer. Brains have evolved to make sense of and move within their environments. They can only do so if they meet with the analog environment.
This idea however is an incomplete picture in the framing of code duality. The brain should have a digital component as predicted by this hypothesis of code duality. That digital component shares the same origin as our immune system.
Our immune system has the fascinating capability of recalling all the pathogens that have attempted to infect the body. What is the mechanism of this incredible memory system?
I've mentioned earlier that the human cognitive system consists of 3 'brains'. The nervous system, the endocrine system and the immune system. It's a very different triune brain that people conventionally think of.
The difference with biology and things that we design is that the latter has a designer that organizes things. So in a computer, the common currency is electrons. In biology, there is no common currency but a bureaucracy of transactions between different incompatible coins.
RNA has a surprisingly common currency (i.e. nucleotides). It is universal across earth originating living things. The power of digital systems come from a multitude of possible combinations. This only comes from standardization that leads to compatibility.
So evolution despite not having a designer with a mind, it has arrived at a strategy that acts like it has a mind!
@threadreaderapp unroll

More from Carlos E. Perez

Carlos E. Perez
Carlos E. Perez
@IntuitMachine
Damasio in his book 'The Strange Order of Things' argues that the core of condition lies in homeostasis. I agree with this generalization. But let me work out in a tweet storm how consciousness relates to homeostasis.

Human consciousness is related to awareness of surprising or threatening observations. It's an error-correcting mechanism that lends attention to discrepancies of our expectations of the world.

The mind is composed of many layers of cognition. Also, its massive parallelism implies reducing the conditional checks required for error correction.

To do this, consciousness is engaged only in a time-sliced manner in a periodic manner. The majority of time spent is in unconscious activity with only periodic activation of the conscious error-correcting process.

The system 1 unconscious intuitive mechanism minimizes the effort of performing error correction. It is automated and driven by habit. It is like a river flowing without obstructions.
CULTURE
Carlos E. Perez
Carlos E. Perez
@IntuitMachine
In physics, energy is that which is causally invariant or symmetric with respect to time. Said differently, energy is never created or destroyed, it is conserved in the universe.

Now there is a question about information. Is information causally invariant? Does information remain the same with respect to time? To understand this, let's first understand what energy is, then attempt to understand what information is.

The strange thing about energy is that it is this universal currency that seems to be interchangeable between the different forces in nature (i.e. electromagnetic, strong, weak and gravity). It is that thing that makes change possible.

Now let's assume that the universe is computational in nature. That is, anything we see in nature is a consequence of computation. That is, there is computation underneath the physics that is driving the universe to change.

What does it mean then that information is conserved in this computational universe? Also, how is energy conservation related to information conservation?
SOCIETY , SCIENCE
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Carlos E. Perez
Carlos E. Perez
@IntuitMachine
My attempt to map the research *doctrines* of various groups working on Artificial General Intelligence.


Although one might see names of individuals here as well as organizations, take it just as identification of the organization behind the person and a very narrow slice of their overall research portfolio.

Here is a @swardley map that captures the relationship of doctrine with other individual and organizational processes.


We can capture a party's doctrine by either an explicitly stated agenda or an aggregation of the kind of approach that is pursued. A doctrine is an invariant property of the overall behavior of a party.

In this map one can see the conflict between different parties (compare @garymarcus with the deep learning folks).
ARTIFICIAL INTELLIGENCE
Carlos E. Perez
Carlos E. Perez
@IntuitMachine
Abduction is that thought process where we renew our past, question our present, and reimagine our future.

It was C.S. Peirce, a century ago, that coined the use of this term to describe a thought process that would convey hypothesis making.

A little over 50 years ago, proponents of Artificial Intelligence, proposed that deduction would be the core feature of human intelligence. This idea was driven by the bias towards formal logical systems and the emergence of computers.

This approach was in stark contrast to cybernetics (introduced a decade early) that proposed that dynamical systems were a model for intelligence. The descendant of this approach was coined as artificial neural networks.

This dynamical systems approach was later understood as being similar to an induction based thought process. Deep Learning leads to what can be characterized as Artificial Intuition.
LIFE
Carlos E. Perez
Carlos E. Perez
@IntuitMachine
It is astonishing that most of cognitive science ignores an obvious reality. That there are two kinds of humans.

Tomasello has a very credible hypothesis that what distinguishes humans from the great apes is the inclination towards shared intentional behavior. What is innate is the disposition and like personalities, it is what defines our cognition as we grow.

If cognitive preference is so critical in cognitive development then why is it that we seem to have completely ignored the difference in cognitive preferences between men and women?

Humans are that species of primates that wandered out into the savannah. The savannah is different enough from a dense jungle to exert the evolutionary pressures that encourage the development of planning and forecasting skills.

Furthermore, human infants required a disproportional amount of effort to rear. This meant the specialization of roles between women who were responsible for rearing offspring and men who were responsible for bringing home the bacon. Failure in either implied death.
SCIENCE

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Jason Hickel
Jason Hickel
@jasonhickel
Here's more on the new mitigation scenario for 1.5C. How does it work? What would society look like? Are we willing to do what's required to stop climate breakdown? See thread.


1. Most models assume we need to keep growing the economy indefinitely. The problem is this makes it impossible to transition to zero emissions quickly enough; so they speculate on geoengineering and negative-emissions technologies to save us. Scientists reject this as too risky.

2. By contrast, this scenario proposes that high-income countries don't *need* more growth, and can scale down unnecessary production and consumption. This reduces energy demand (from 140 EJ in 2020 to 40 EJ in 2050), and enables a rapid transition to renewable energy.

3. What does it require? In the global North (Annex 1 countries)
•a shift from private cars to public transportation
•reduction in flights
•smaller average house size

Meanwhile, consumption in the global South (non-Annex 1 countries) rises to converge.


4. Significant reduction of aggregate material use. How? Longer product lifespans; regionalization of production and consumption; ban on advertising; a shift in taxes from labour to resources. All of this allows us to reduce ground freight, which cuts energy use.
SCIENCE
Michael Adebayo \U0001f1f3\U0001f1ec\U0001f1eb\U0001f1f7
Michael Adebayo 🇳🇬🇫🇷...
@MichAdebayo
Wonder why your Ph.D./Master's application is being rejected?

Here are some insider reasons (from a committee member) that result in such "Love Letters" 👇

- A Short Thread

1) First, you should know that sometimes, an independent reviewer is required (especially in the US) to review applications even after PIs must have selected their candidates. So, even if any bias slips through the PI, the independent reviewer will pick it up.

2) Having said this, there are three major issues that application reviewers/committees often find with your application. These three components make your applications almost challenging to assess.

3) NUMBER ONE - Incomplete Applications

This occurs when you do not upload the requested documents needed to evaluate your file. Think of a candidate that did not send a GRE score when the institution clearly requires it for admission.

4) NUMBER TWO - Error laden Essays

This is particularly interesting because based on reports from this resource person, it is not particularly about how little your experience is but how you communicate it error-free or at least extensively minimized. This gives headache!
SCIENCE
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Lior Pachter
Lior Pachter
@lpachter
"The new answer to a 77-year-old problem"

😭


https://t.co/hm9NoaU4nr


https://t.co/8fKDiKjSWc


https://t.co/jkaicC1F2x


https://t.co/PpxWT4Jef4
SCIENCE
Navin Kabra
Navin Kabra
@NGKabra
Did you know that all the nuclear bombs we exploded in the '40s-50s-60s have permanently contaminated all the steel the world has produced since then? All steel in the world is divided into two categories: pre-1945 non-contaminated steel, and post-1945 contaminated steel.

How?

Nuclear bombs (including the tests) create a lot of radioisotopes that are not found in nature. For example Cobalt-60 (a radioactive version of Cobalt-59). And since the 1945 Trinity test, these have all dispersed in the atmosphere.

What does this have to do with steel?

The process of manufacturing steel uses atmospheric air (or atmospheric oxygen). Some of the radioisotopes like Cobalt-60 get pulled in too, and as a result, any steel produced after 1945 has embedded in it some of these radioisotopes, sitting there emitting gamma rays.

Why do we care about traces of radioisotopes in steel? When making Geiger counters, or medical devices to check for radioactive contamination, or astronomical instruments, the emissions from the contaminated steel would interfere with the measurements.

So we need pre-1945 steel

Pre-1945 non-contaminated steel is called "low background steel". And when we need it, where do we get it from?

We go, find pre-World-War-II sunken shipwrecks, and then salvage the steel (and lead) from those to build our instruments which need heavy radiation shielding.
SCIENCE
Trespassers William
Trespassers William
@Mammoth_Spotter
Read this thread from @lilithsaintcrow. I really mean it. Just read it. Because if what she is saying is true (and I happen to think it is) it explains *so much*

An example using the Flat Earthers: A thread of many parts:


I'm firmly convinced that the flat Earth thing was started by some adolescent trolls with nothing more productive to do. They didn't believe it, but they thought it was entertaining to keep pretending that they did.

You can't engage with them, because they *are playing a game*. They think it's fun to see if they can get anybody to engage with something completely stupid as though it's true.

If you challenge them, the rules of the game state that they have to argue as hard and a spuriously as they like, but *never* to admit that the Earth is not in fact flat. I suppose you have to make up your own entertainment on 4chan or whatever hole this was conceived in.

It's annoying as hell, but I suppose it doesn't do much harm.. except to folks like this:
SCIENCE

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Anshul Pandey
Anshul Pandey
@Anshulspiritual
LING PURANA: IMPORTANCE AND CHARACTERISTICS

Reading Ling Purana provides bhog and moksha to the reader and listeners. It is about Shiva's sermon to Brahma when Shiva entered the Agni Ling and preached about Dharma sidhhi through the stories of Agni Kalp.


Vyasji divided this into two parts. This book is different from others and has eleven thousand shlokas which depict the glory of Shiva. This Puran is the summary about importance of Tridev.
It starts first with a questions. Then it describes the Shrishti in brief.

Then there is description of Yog and Kalp. Next is the evolution of Ling and its puja Vidhi. It consists of dialogue between Sanat Kumar and Shail etc. It also mentions the character of Dadhichi, the dharma representation of that yug, Bhuvan kosh description,

Chandravansh and Surya vansh. Next there is elaborate description of Shrishti, story of Tripur, Ling and Pashu Paash vimoksha, Vrats for Shiva, Discipline, Repentance, Arisht, description of Shri Shail. Next is the story of Andhakasur, Varah, Narsingh,

k¡lling of Jalandhar, Shiv sahastra naam, story of Daksha's yagya and its destruction, killing of Madan and marriage of Parvati.

Next is Vinayak katha, Shiv tandav, Ambrish katha and Upmanyu .
RELIGION
Julien \U0001f332
Julien 🌲
@julien
1/ there is this sense when you are young that your accomplishments need to be a list of things that seem impressive to others. A list of several items you did.

This isn't actually right, so here is another suggestion.

2/ I remember being 26 and writing about reading 52 books a year. I wrote blog posts about it. They got copied. It became "a thing." Now it's in Twitter bios. It looks impressive but it's insanely useless and I shouldn't have done it.

3/ what I should have known at that time is that only young idiots like myself, with no accomplishments, find list of tiny achievements impressive. Anyone who has actually done anything of substance doesn't gaf

4/ what is actually difficult, and worthwhile, instead is to do ONE single thing for a very, very long time. It's much harder and much rarer and results in outlier outcomes much more often.

Of course you can find this out too late if you are chasing the dragon of Ted talks etc

5/ if I had only worked on a startup for a year, I would've gotten nowhere, the same way that if you lift for 3 months, it achieves nothing. Everything good in life comes from perseverance, but at the beginning, you're just like "I need to be somebody!!!"
LIFE
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Billy Bostickson \U0001f3f4\U0001f441&\U0001f441 \U0001f193
Billy Bostickson 🏴👁&👁 ...
@BillyBostickson
1. Project 1742 (EcoHealth/DTRA)
Risks of bat-borne zoonotic diseases in Western Asia

Duration: 24/10/2018-23 /10/2019

Funding: $71,500
@dgaytandzhieva
https://t.co/680CdD8uug


2. Bat Virus Database
Access to the database is limited only to those scientists participating in our ‘Bats and Coronaviruses’ project
Our intention is to eventually open up this database to the larger scientific community
https://t.co/mPn7b9HM48


3. EcoHealth Alliance & DTRA Asking for Trouble
One Health research project focused on characterizing bat diversity, bat coronavirus diversity and the risk of bat-borne zoonotic disease emergence in the region.
https://t.co/u6aUeWBGEN


4. Phelps, Olival, Epstein, Karesh - EcoHealth/DTRA


5, Methods and Expected Outcomes
(Unexpected Outcome = New Coronavirus Pandemic)
ALL
Nicolas Cole
Nicolas Cole
@Nicolascole77
🚢 Atomic Essays Republishing Framework 🚢

1. Write Atomic Essay
2. Post image on Twitter
3. (Bonus) Copy/paste text as thread
4. Find relevant Question on Quora. Copy/paste Atomic Essay + image.
5. Copy/paste again on Medium.
6. Again on LinkedIn
7. Win

Guide below ✍️🚢👇

Step 1: Write Atomic Essay

I really enjoy writing right inside the Figma template. It helps give me a good sense of exactly how much "real estate" I have/have left before my time us up and I'm out of space.

Once finished, I export the image and send to my phone on Slack.


Step 2: Post image on Twitter

Before I publish my Atomic Essay on Twitter, I use the Edit/Photo Markup function on the iPhone to highlight standout sentences.

These are usually power-phrases: things the reader skims and thinks, "That's interesting," prompting them to read more.


Step 3: For the Ship 30 for 30 challenge, I only turn Atomic Essays into threads if...

1. The piece is SUPER actionable and lends itself well to the thread format (lots of bullets, quick points, lists, etc.)

or...

2. I'm referencing research and want to link to the pieces.

Step 4: Find relevant Question on Quora. Copy/paste Atomic Essay + image.

Search on Quora around the topic you wrote about. Find a related Question. Copy/paste the whole Atomic Essay as your "answer" (& fix formatting). Then include image so it appears in the thumbnail.
WRITING
SK
SK
@sk_diary1
Kolaru Pathigam-Thevaram hymn composed by ThiruGnana Sambandar- #Thread

In Tamil Kol means planets,Aru means cut- set of songs in Kolaru Pathigam addresses all Navagrahas& last 2 lines of every song with end a plea to Bhagwan Shiva to reduce/erase the ill effects of Navagrahas


கோளறு பதிகம் - This pathigam was sung by Thirugnana Sambandar at Thirumaraikadu Kshetram -Vedaranyam,Tamilnadu

Thirugnana Sambandar & Appar(Thirunavukkarasar) travelled together to various Shiva Alayam to spread shivam & bhakti among people.They both reached Thirumaraikadu.


Thirumaraikadu(Vedaranyam) -
Appar & Sambandar were asked to enter the temple through side entrance.The main door was locked by Vedas many years ago.Appar&Sambandar sang devotional hymns praising Shiva, after which the gates opened & closed.After which main door opened for all.


After darshan of Bhagwan Shiva at Thirumaraikkadu,Sambandar received a message to travel to Madurai.
During that time, Samanam was on the rise in the Pandya Kingdom.The Pandya King converted to Samanam.The Queen Mangaiyarkkarasi was a staunch Shiva devotee and was upset.

Kularchirai Nayanar ,Chief Minister of Pandya kingdom was in agony by the turn of events.Queen requested Kulachirai Nayanar to escort Thiru gnana Sambandar to Madurai.Kularchirai Nayanar met Thiru gnana Sambandar at Thirumaraikkadu & requested him to visit Madurai.
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