Showing posts with label natural vs artificial. Show all posts
Showing posts with label natural vs artificial. Show all posts

Tuesday, April 19, 2022

Characterization of Memetic Propagation via Digital Media and Algorithmic Amplification


AKA The Semibotic Socialization Machine

Ludwig Fleck already detailed much of this behavior in his 1935 book Genesis and Development of a Scientific Fact, a staggeringly prescient work when read in the zeitgeist of today. 

Controversy elicits engagement, and engagement facilitates polarization, since humans polarize themselves naturally. Or maybe it's the information polarizing itself, through us. Nonetheless, digital media enables algorithms to accelerate this natural dynamic. Now let's spread those two sentences over the next two pages:


Disagreement may be a way to make online content spread faster, further
Jul 2021, phys.org

Computational Simulation of Online Social Behavior (SocialSim) program of the U.S. Defense Advanced Research Projects Agency: exists

23,000 "controversial" posts about cybersecurity were seen by nearly twice the number of people and traveled nearly twice as fast when compared to 24,000 posts not labeled controversial (the Reddit definition of controversial is to have increasing numbers of both likes and dislikes). The controversial posts had 60,000 total comments, vs 25,000 for the non-controversial posts.

via University of Central Florida's Department of Computer Science: Jasser Jasser et al, Controversial information spreads faster and further than non-controversial information in Reddit, Journal of Computational Social Science (2021). DOI: 10.1007/s42001-021-00121-z

Here's a good example of what happens when we automate socialization with revenue prioritized over the public good:

"In a recent video, @jameslxke asks his followers why TikTok’s algorithm puts trans users in harm’s way by promoting their content on conservative For You pages. If the algorithm is smart enough to know each user’s identity and is intent on keeping users on its platform, @jameslxke reasons, then why does it put vulnerable users at risk for what he calls a “digital lynching”? In the comment section of @jameslxke’s video, users speculate that creating conflict serves the platform’s bottom line: “tiktok does it on purpose bc arguing/dialogue keeps people on the app & the shock value of sending videos to ppl who wont enjoy it boost their app.” By sharing experiences, asking questions, and crowdsourcing answers, teens are developing an algorithmic folklore while discerning the potential motivations behind TikTok’s software engineering.
-Strategic Knowledge: Teens use “algorithmic folklore” to crack TikTok’s black box, by Iretiolu Akinrinade for the Data & Society Institute on Jul, 2021 [link]


Viral true tweets spread just as far as viral untrue tweets
Nov 2021, phys.org

Correction -- in self-similar and metalogical form, the viral meme that fake viral memes spread farther and faster than the truth is actually not true. (If you're ever trying to make shit up that's crazier than what's really happening in the world, then you will fail.)

The problem is that we all know "a lie has spread halfway around the world before the truth has put its pants on". So when we hear that fake news is more fit, as in survival-of-the-fit, it makes perfect sense, and it sticks. Kind of like accidentally eating spiders in your sleep?

In this study, they looked at a part of network dynamics called "cascades", which follow the path a tweet takes as it spreads through the network. In this case, the cascade takes the form of retweets. It turns out that the cascade of true and fake tweets are indistinguishable. Now let's see how long it takes to correct this one. 

via Cornell University: Jonas L. Juul et al, Comparing information diffusion mechanisms by matching on cascade size, Proceedings of the National Academy of Sciences (2021). DOI: 10.1073/pnas.2100786118


People unknowingly group themselves together online, fueling political polarization across the US
Dec 2021, phys.org

They found that when people are less reactive to news, their online environment remains politically mixed. However, when users constantly react to and share articles of their preferred news sources, they are more likely to foster a politically isolated network, or what the researchers call "epistemic bubbles."

Once users are in these bubbles, they actually miss out on more news articles, including those from their preferred media outlets. Users seem to avoid what they deem as "unimportant" news at the expense of missing out on subjectively important news, the model shows.

Polarization of online social networks emerges naturally as people curate their feeds.

People who consume and share fake news might be inadvertently isolating themselves from everyone else who follows mainstream sources.
via Princeton: Polarized information ecosystems can reorganize social networks via information cascades, Proceedings of the National Academy of Sciences (2021). DOI: 10.1073/pnas.2102147118.


Why false news snowballs on social media
Dec 2021, phys.org

When a network is highly connected or the views of its members are sharply polarized, news that is likely to be false will spread more widely and travel deeper into the network than news with higher credibility. Even if people are rational in how they decide to share the news, this could still lead to the amplification of information with low credibility.

Important to understand the idea of "cost" in sharing information (and thus in the greater idea of memetic propagation) - "Nominal cost, for instance, taking some action, if you are scrolling on social media, you have to stop to do that. Think of that as a cost. Reputation cost might come if I share something that is embarrassing. Everyone has this cost, so the more extreme and the more interesting the news is, the more you want to share it." If the news affirms the agent's perspective and has persuasive power that outweighs the nominal cost, the agent will always share the news. But if an agent thinks the news item is something others may have already seen, the agent is disincentivized to share it.

Talking about information cascades, or news cascades, they say the credibility threshold is lower the more connected the network is and the more surprising the news is. But also, in a polarized network, where many of the nodes are likely to spread extreme views, the credibility threshold is also very low. 

"For any piece of news, there is a natural network speed limit, a range of connectivity, that facilitates good transmission of information where the size of the cascade is maximized by true news. But if you exceed that speed limit, you will get into situations where inaccurate news or news with low credibility has a larger cascade size," Jadbabaie says.

If the views of users in the network become more diverse, it is less likely that a poorly credible piece of news will spread more widely than the truth.

via Massachusetts Institute of Technology: Chin-Chia Hsu et al, Persuasion, News Sharing, and Cascades on Social Networks, SSRN Electronic Journal (2021). DOI: 10.2139/ssrn.3934010

Post Script:
Adaptive Metamemetics, Infectious Disease Networks, and Ludwig Fleck's Thought Collectives, 2020

Genesis and Development of a Scientific Fact. Ludwig Fleck, 1935 (Switzerland). Edited by Thaddeus J. Trenn and Robert K. Merton. Translated by Fred Bradley and Thaddeus J. Trenn. Foreword by Thomas S. Kuhn. Published by University of Chicago, 1979.

What Even Is 'Coordinated Inauthentic Behavior' on Platforms?
Wired Opinion. Sep 17, 2020. [soft paywall]

What Is ‘Coordinated Inauthentic Behavior’?
Snopes, Sep 4, 2021. [link]

Monday, March 28, 2022

Out To Lunch


Synthetic biology moves into the realm of the unnatural
Oct 2021, phys.org

Keeping up with the synthetic biobots.

"It's a completely new way of doing chemical synthesis. The idea of creating an organism [it's E. coli btw] that makes such an unnatural product [cyclopropanated chemicals in this case], that combines laboratory synthesis with synthetic biology within a living organism — it is just a futuristic way to make organic molecules from two separate fields of science in a way nobody's done before," said John Hartwig, UC Berkeley professor of chemistry and one of four senior authors of the study.

via University of California Berkeley: ing Huang et al, Unnatural biosynthesis by an engineered microorganism with heterologously expressed natural enzymes and an artificial metalloenzyme, Nature Chemistry (2021). DOI: 10.1038/s41557-021-00801-3

Designing microbe factories for sustainable chemicals
Nov 2021, phys.org

The guide for how synthbio takes over the world.

In this case, it's only for one thing, called itaconic acid, which is considered one of the "top value added chemicals from biomass" in a 2004 report by the Department of Energy.

They're using what's called the Design-Build-Test-Learn strategy, where they first use AI to assist in identifying genes that can be either removed or added from the yeast Yarrowia lipolytica. Once the genes of interest are identified, the yeast is modified, "designed" if you will. Then they run it and see what kinds of products it generates via its metabolism. Eventually there will be all kinds of chemicals, from toxic dyes for clothing, to toxic catalysts for rubberized flooring, to rare chemicals, to chemicals that destroy the planet in their creation process, that will be created instead by re-engineered bacteria.

Like, imagine if you wanted some adhesive to hang a sign on the door that said Out to Lunch, so you swallowed a capsule of some magic human engineering dust, and within a couple minutes, your spit is now sticky enough to tack a sign on your door. That's quite a stretch, but that's the idea. (Granted we are not as simple to re-engineer as a bacterium, but it's the analogy that counts.)

via Pacific Northwest National Laboratory: Andrew D. McNaughton et al, Bayesian Inference for Integrating Yarrowia lipolytica Multiomics Datasets with Metabolic Modeling, ACS Synthetic Biology (2021). DOI: 10.1021/acssynbio.1c00267


Novel artificial genomic DNA can replicate and evolve outside the cell
Nov 2021, phys.org

Sorry I didn't get that, could you repeat?

To date, it has been impossible to create a reaction system in which the genes necessary for DNA replication are expressed while those genes simultaneously carry out their function.

They added the genes necessary for transcription and translation to the artificial genomic DNA, which I think means that once a yeast has been re-engineered (see above), it can then reproduce itself, instead of us re-engineering it over and over?

via Japan Science and Technology Agency: Hiroki Okauchi et al, Continuous Cell-Free Replication and Evolution of Artificial Genomic DNA in a Compartmentalized Gene Expression System, ACS Synthetic Biology (2021). DOI: 10.1021/acssynbio.1c00430


Algorithms mimic the process of biological evolution to learn efficiently
Nov 2021, phys.org

And just another synth bio advance in synthetic biology.

They're using synaptic plasticity as a model for understanding biological information processing, i.e., computers that learn. But their model uses an algorithm based on the process of biological evolution, i.e., natural selection. It's called "evolving-to-learn" (E2L).

via European Human Brain Project, Institute of Physiology, University of Bern, the RIKEN Center for Brain Science in Tokyo, and others: Jakob Jordan et al, Evolving interpretable plasticity for spiking networks, eLife (2021). DOI: 10.7554/eLife.66273


Scientists develop the 'evotype' to unlock power of evolution for better engineering biology
June 2021, phys.org

They're making sure that engineered biosystems aren't static, but evolve, like if you made a watch that kept changing itself to adapt to your lifestyle, "they design living populations that continue to mutate, grow and undergo natural selection." I think the keyword is "self-improving" biotechnologies

via University of Bristol: Simeon D. Castle et al, Towards an engineering theory of evolution, Nature Communications (2021). DOI: 10.1038/s41467-021-23573-3

Image credit: It's just a close-up of an enterococcus

Thursday, July 8, 2021

The Eigenmeme

 Lactose Resistance, The Royal Society
Milk has humans written all over it. We're the only mammals that drink milk into adulthood. And that's because we genetically re-engineered ourselves to do it. 

For other mammals, and for lots of humans still, our body stops producing the enzyme that breaks lactose into usable nutrients once we're no longer kids. Without the enzyme (lactase), lactose stays a big glob of gunk that gives us indigestion. 

Apparently, we liked milk so much that we just kept drinking it, and eventually we kept producing lactase for longer and longer into adulthood. We genetically modified ourselves through dairying practices, and it's the first example, or at least the best-documented, of cultural evolution. (Although the cultural evolution of seeing colors might be more interesting.)

Here's some more news on cultural transmission:

Study reveals lactose tolerance happened quickly in Europe
Sep 2020, phys.org

Some 3,000-year-old bones were found to NOT have the milk-drinking mutation. Medieval remains had the mutation in 60%, and modern people (from Northern and Central Europe) have it in 70-90%. This mutation happened way faster than anyone thought. 

via Stony Brook University: Current Biology (2020). dx.doi.org/10.1016/j.cub.2020.08.033

Why some humans developed a taste for milk and some didn't
Sep 2020, phys.org

The trait of lactase persistence actually emerged independently at least three times; in northern Europeans, emanating from what is now Denmark, and in two geographically distinct African populations...involved different genetic changes, but to the same gene, lactose dehydrogenase, required for metabolising lactose into glucose.

via the University Of Cambridge: Yuval Itan et al. The Origins of Lactase Persistence in Europe, PLoS Computational Biology (2009). DOI: 10.1371/journal.pcbi.1000491

Ancient proteins help track early milk drinking in Africa
Jan 2021, phys.org
In Europeans, there is one main mutation linked to lactase persistence, but in different populations across Africa, there are as many as four. How did this come to be? The question has fascinated researchers for decades. How dairying and human biology co-evolved has remained largely mysterious despite decades of research.
via the Max Planck Society: Madeleine Bleasdale et al. Ancient proteins provide evidence of dairy consumption in eastern Africa, Nature Communications (2021). DOI: 10.1038/s41467-020-20682-3

Also:

Post Script:
Greater than the sum of our parts: The evolution of collective intelligence
Jun 2021, phys.org

All Brains Equal:
Dr. Taylor continued: "For example, a form of cognition currently viewed as a disorder, dyslexia, is shown to be a neurocognitive specialization whose nature in turn predicts that our species evolved in a highly variable environment. This concurs with the conclusions of many other disciplines including palaeoarchaeological evidence confirming that the crucible of our species' evolution was highly variable." -link

Monday, January 29, 2018

Neuromorphs


NIST's superconducting synapse may be missing piece for 'artificial brains'
Jan 2018, phys.org

image source

Neuromorphic computers eh? Better than the real thing eh?

National Institute of Standards and Technology (NIST) have built a superconducting switch that "learns" like a biological system and could connect processors and store memories in future computers operating like the human brain. ...

Even better than the real thing, the NIST synapse can fire much faster than the human brain—1 billion times per second, compared to a brain cell's 50 times per second—using just a whiff of energy, about one ten-thousandth as much as a human synapse. -phys.org

Saturday, May 20, 2017

Buildings On Ice

No it's real though.

If there is one thing I learned in architecture school, it's that water is the building's number one enemy. (Insects are number two, by the way.)

High winds turned this New York home into an ice house
the internet, 2017

Wednesday, January 4, 2017

Are Clothes Modern

Are Clothes Modern? An Essay on Contemporary Apparel, Bernard Rudofsky, 1947

Neanderthals' failure to make parkas may have sealed their demise
Aug 2016, phys.org

Tuesday, January 3, 2017

Nature Nature Everywhere


Van Gogh's starry swirls are generally known to be formed according to Levy distributions, which are mathematical formulae, and can be found in turbulent water and other natural phenomena

Musical melodies obey same laws as foraging animals
phys.org, Jan 2016

"The researchers found that the distribution of melodic intervals in two classical concertos and two folk songs can be modeled by a Lévy distribution... [which] describes many other diverse scenarios, such as the turbulent motion of a particle in a liquid or gas, the changes in the price of a stock, earthquake activity, and the foraging paths of wild animals."

It really makes you wonder natural vs artificial, and free will etc.

Did Van Gogh really put those lines there, or was he just following his animal instinct. Debussy?

POST SCRIPT

Music, the Arts and Ideas
Leonard B. Meyer, U. of Chicago, 1967

“It is impossible to stand outside of culture, for the models and categories we use on conceptualizing and ordering the world are necessarily limited to, if not determined by, those which are provided by our particular culture.” (viii)

“A culture, like a musical style, is a learned probability system.” (p17, footnote 21)

Culture as Learned Probability System
Network Address, 2012

Saturday, November 26, 2016

Biobots


This image is an illustration by John Tenniel for Alice in Wonderland, and is noted for its ambiguous central figure, whose head can be viewed as being a human male's face with a pointed nose and protruding chin or being the head end of an actual caterpillar, with two "true" legs visible. It has nothing to do with this post really, I was just thinking "cool ass caterpillar picture."
source

Graphene is the world's first two-dimensional material (is it the universe's first...?), because it is one-atom thick, and which sucks because I can't tell my art students that there is no such thing as two dimenional things like circles and squares. I mean technically, graphene is still 3-D, because it's third dimension is as thick as a carbon atom (about 0.3 nanometers), but because no-thing is smaller than the atom-scale, then we can get away with calling it 2-D.

Graphene is a wonder material, and it will change the world "in the same way plastics did," says the guy in this article below. Thing is, it's hard to make. Like quantum computing is great and all, but a qubit is really hard to make. Anyway, that's a bit different now with this headline:

For super-strong silk threads, feed graphene to silkworms

Researchers at Tsinghua University in Beijing fed the one-atom-thick, tremendously tough material to silkworms in one of the first applications of graphene that could become mainstream.

Christian Science Monitor, Oct 2016
http://csmonitor.com/Science/2016/1011/Want-super-strong-silk-threads-Just-feed-the-silkworms-some-graphene

The Poison Is In the Dose


"Every time we turn on a light, we are inadvertently taking a drug that affects how we sleep." (p.304)
-Chronobiologist Charles A. Czeisler

(I forgot to note this, but I think it's written circa 1800?)

At Day's Close: Night in Times Past. A. Roger Ekirch. Norton, New York: 2005.