iuculano, to internet
@iuculano@masto.ai avatar
bibliolater, to nauka
@bibliolater@qoto.org avatar

"A radical theory that consistently unifies gravity and quantum mechanics while preserving Einstein’s classical concept of spacetime is announced today in two papers published simultaneously by UCL physicists." https://www.ucl.ac.uk/news/2023/dec/new-theory-seeks-unite-einsteins-gravity-quantum-mechanics @physics @science

bibliolater, to nauka
@bibliolater@qoto.org avatar

"We consider two interacting systems when one is treated classically while the other system remains quantum. Consistent dynamics of this coupling has been shown to exist, and explored in the context of treating space-time classically. Here, we prove that any such hybrid dynamics necessarily results in decoherence of the quantum system, and a breakdown in predictability in the classical phase space."

Oppenheim, J., Sparaciari, C., Šoda, B. et al. Gravitationally induced decoherence vs space-time diffusion: testing the quantum nature of gravity. Nat Commun 14, 7910 (2023). https://doi.org/10.1038/s41467-023-43348-2 @physics @science

bibliolater, to nauka
@bibliolater@qoto.org avatar

"But a new theory, developed by Professor Jonathan Oppenheim (UCL Physics & Astronomy) and laid out in a new paper in Physical Review X (PRX), challenges that consensus and takes an alternative approach by suggesting that spacetime may be classical – that is, not governed by quantum theory at all.

Instead of modifying spacetime, the theory – dubbed a “postquantum theory of classical gravity” – modifies quantum theory and predicts an intrinsic breakdown in predictability that is mediated by spacetime itself. This results in random and violent fluctuations in spacetime that are larger than envisaged under quantum theory, rendering the apparent weight of objects unpredictable if measured precisely enough." https://www.ucl.ac.uk/news/2023/dec/new-theory-seeks-unite-einsteins-gravity-quantum-mechanics @physics @science

bibliolater, to nauka
@bibliolater@qoto.org avatar

"But a new theory, developed by Professor Jonathan Oppenheim (UCL Physics & Astronomy) and laid out in a new paper in Physical Review X (PRX), challenges that consensus and takes an alternative approach by suggesting that spacetime may be classical – that is, not governed by quantum theory at all.
Instead of modifying spacetime, the theory – dubbed a “postquantum theory of classical gravity” – modifies quantum theory and predicts an intrinsic breakdown in predictability that is mediated by spacetime itself. This results in random and violent fluctuations in spacetime that are larger than envisaged under quantum theory, rendering the apparent weight of objects unpredictable if measured precisely enough." https://www.ucl.ac.uk/news/2023/dec/new-theory-seeks-unite-einsteins-gravity-quantum-mechanics @physics @science

bibliolater, to nauka
@bibliolater@qoto.org avatar

"Our results show that forcing by warm ocean water can cause the rapid onset of dynamic imbalance and increased ice discharge from glaciers on the Antarctic Peninsula, highlighting the region’s sensitivity to future climate variability."

Wallis, B.J., Hogg, A.E., Meredith, M.P. et al. Ocean warming drives rapid dynamic activation of marine-terminating glacier on the west Antarctic Peninsula. Nat Commun 14, 7535 (2023). https://doi.org/10.1038/s41467-023-42970-4 @science

bibliolater, to literatura
@bibliolater@qoto.org avatar
owgf.org, to nauka
@owgf.org@owgf.org avatar

WOW What an inspiring video!

Permaculture instructor Andrew Millison journeys to Senegal to see a forest garden movement which is contributing to Africa’s Great Green Wall. Andrew accompanies the organization Planet Wild to visit the excellent work of Trees for the Future. This remarkable project holds the promise of combating desertification, providing livelihoods, and nurturing the environment. At its core, this initiative revolves around the creation of lush food forests that transform land into thriving ecosystems.

A Green Oasis, on a Quarter-Acre Plot

At the heart of this initiative lies small quarter-acre plots that encapsulates the project’s essence. These tiny pieces of land can provide everything a family needs, from building materials to food production, habitat, and temperature regulation. It is a microcosm of what is known as a permaculture multi-layered food forest.







The Great Green Wall of Africa

Andrew talks about the the ambitious vision of the Great Green Wall of Africa, a colossal project aimed at planting a barrier of trees across the width of the continent, from Senegal to Djibouti. The primary goal is to halt the encroachment of the Sahara Desert. This project has failed in many places because the trees could not be looked after properly, due to the sheer size and scope of the project. These permaculture food forests offer a complementary solution to the problem.

https://owgf.files.wordpress.com/2023/12/the-great-green-wall-of-africa.png?w=1024A Four-Year Plan for Transformation

The heart of this initiative lies in a four-year plan that guides the transformation process. It involves stages such as protection, diversification, and optimization, gradually establishing forest gardens that bear fruit.

https://owgf.files.wordpress.com/2023/12/senegal-food-forest-plan.png?w=1024Abundance and Nutrition

The article emphasizes the substantial impact of these forest gardens on nutrition and economic stability. These ecosystems provide diverse and stable sources of food, reducing the vulnerability of families to crop failures. The success of this project has led to ambitious plans for expansion. The aim is to replicate this methodology in every district of Senegal and other African countries, turning the tide against desertification.

https://owgf.files.wordpress.com/2023/12/senegal-food-forest-girl.png?w=1024Collaborative Conservation

Andrew concludes by highlighting the collaboration with Planet Wild, a global community dedicated to environmental restoration. They join hands with Trees for the Future to support tree planting in Senegal and elsewhere, showcasing the power of collective action.

In essence, this initiative in Senegal stands as a beacon of hope in the fight against desertification and climate change. Through the creation of forest gardens and collaborative efforts, it not only restores the land but also provides sustainable livelihoods for communities. It’s a testament to the transformative power of nature-based solutions in an ever-changing world.

Watch he full video here

💬 🔜 🌳 Comment on the video to plant a tree! – Planet Wild will plant one extra tree for everyone who leaves a comment on the video before the end of 2023.

Planet Wild is an amazing community that is restoring the Earth through the power of Youtube! I highly recommend to checkout their channel. Their rewilding videos are truly fascinating. They have done a video on this exact same subject here: https://www.youtube.com/watch?v=m_SzuUHXP1M

Trees for the Future: https://trees.org/ Learn more about Food Forests with the online course with Oregon State University: https://workspace.oregonstate.edu/course/permaculture-food-forests-online-course

Andrew Millison’s links:


Join the Conversation over on Mastodon: https://mastodon.world/F



bibliolater, to nauka
@bibliolater@qoto.org avatar

"Y-chromosome results highlight a significant genetic differentiation between the North-Western and South-Eastern part of the Mediterranean, the Italian Peninsula occupying an intermediate position therein. In particular, Sicily and Southern Italy reveal a shared paternal genetic background with the Balkan Peninsula and the time estimates of main Y-chromosome lineages signal paternal genetic traces of Neolithic and post-Neolithic migration events."

Sarno S, Boattini A, Carta M, Ferri G, Alù M, et al. (2014) An Ancient Mediterranean Melting Pot: Investigating the Uniparental Genetic Structure and Population History of Sicily and Southern Italy. PLOS ONE 9(4): e96074. https://doi.org/10.1371/journal.pone.0096074 @science @biology @anthropology

bibliolater, to nauka
@bibliolater@qoto.org avatar

"Decades after the scientific debate about the anthropogenic causes of climate change was settled, climate disinformation still challenges the scientific evidence in public discourse. Here we present a comprehensive theoretical framework of (anti)science belief formation and updating to account for the psychological factors that influence the acceptance or rejection of scientific messages."

Spampatti, T., Hahnel, U.J.J., Trutnevyte, E. et al. Psychological inoculation strategies to fight climate disinformation across 12 countries. Nat Hum Behav (2023). https://doi.org/10.1038/s41562-023-01736-0 @science @psychology

bibliolater, to historia
@bibliolater@qoto.org avatar

"Christian Doppler was an Austrian mathematician who is best known for the Doppler effect in wave theory." https://mathshistory.st-andrews.ac.uk/Biographies/Doppler/ @science

bibliolater, to nauka
@bibliolater@qoto.org avatar

"Our findings demonstrate a dampening effect on perceptual, emotional, and evaluative processing of presumed deepfake smiles, but not angry expressions, adding new specificity to the debate on the societal impact of AI-generated content."

Eiserbeck, A., Maier, M., Baum, J. et al. Deepfake smiles matter less—the psychological and neural impact of presumed AI-generated faces. Sci Rep 13, 16111 (2023). https://doi.org/10.1038/s41598-023-42802-x @psychology

bibliolater, to historia
@bibliolater@qoto.org avatar

"Abraham de Moivre (born May 26, 1667, Vitry, Fr.—died Nov. 27, 1754, London) French mathematician who was a pioneer in the development of analytic trigonometry and in the theory of probability"

Britannica, The Editors of Encyclopaedia. "Abraham de Moivre". Encyclopedia Britannica, 23 Nov. 2023, https://www.britannica.com/biography/Abraham-de-Moivre. Accessed 27 November 2023. @science

kmic, to natura
@kmic@qoto.org avatar
bibliolater, to nauka
@bibliolater@qoto.org avatar

"Just 300,000 years ago – a blink in evolutionary time – at least nine species of humans wandered the planet. Today, only our own, Homo sapiens, remains. And this raises one of the biggest questions in the story of human evolution: where did everyone else go?" https://www.theguardian.com/science/2023/nov/18/where-did-other-human-species-go-vanished-ancestors-homo-sapiens-neanderthals-denisovans @science

Sheril, to nauka
@Sheril@mastodon.social avatar

About 250M years ago, 90% of species on Earth died during the Permian extinction. All of that loss created a lot of vacant niches to fill. And not long after, the first mammals, our ancestors, appeared.

Life on this pale blue dot will continue to be resilient - whether or not we’re part of it.

bibliolater, to nauka
@bibliolater@qoto.org avatar

"The Y-chromosomal variation in South Kazakh clans indicates their common origin in 13th–14th centuries AD, in agreement with the traditional genealogy. Though genetically there were at least three ancestral lineages instead of the traditional single ancestor."

Zhabagin, M., Sabitov, Z., Tarlykov, P. et al. The medieval Mongolian roots of Y-chromosomal lineages from South Kazakhstan. BMC Genet 21 (Suppl 1), 87 (2020). https://doi.org/10.1186/s12863-020-00897-5 @science

bibliolater, to nauka
@bibliolater@qoto.org avatar

"The primary objectives of this study were to assess the paternal genetic variation in Altaian Kazakh populations and their population histories, to understand the paternal origins of Kazakhs, and to elucidate the process by which this ethnic group formed."

Dulik MC, Osipova LP, Schurr TG (2011) Y-Chromosome Variation in Altaian Kazakhs Reveals a Common Paternal Gene Pool for Kazakhs and the Influence of Mongolian Expansions. PLOS ONE 6(3): e17548. https://doi.org/10.1371/journal.pone.0017548 @science

to3k, to nauka
@to3k@tomaszdunia.pl avatar

Maybe something will finally change in the subject of meteorological forecasts! I’ve already written about it, but I’ll say it again. The scandal for me is that humanity is really developed, and we are not able to predict what the weather will be tomorrow...
Learning skillful medium-range |

erinnacland, to nauka
@erinnacland@fediscience.org avatar

The "top" postdocs in Canadian are awarded 40,000 CAD/year by the government. It costs 45% of that salary to rent a 1-bedroom in Toronto.

The government announced yesterday that it's not increasing our funding.

"For over two decades, these critical contributors to research and innovation have received no funding increase from the federal government and now face significant financial challenges." -

@academicchatter @academicsunite

philo, to astronomia
@philo@astronomy.city avatar

The M1 Crab Nebula.

This is a supernova remnant. The Chinese recorded the supernova event in 1060AD, and even saw it during daylight hours for several days. It lies around 6,500 light years away.

About 3 hours of 4-minute exposures. Celestron C8 SCT, ZWO183MC camera and Celestron F6.3 focal reducer.

One version is starless to better show off the nebula.

The M1 Crab Nebula. An explosive-looking nebula in a starfield, showing off white and red ripples and shockwaves. Stars removed.

admin, to psychology
@admin@mastodon.clinicians-exchange.org avatar

I'm copying a public post below from an interesting Assistant Professor of Philosophy and Data Science at UNCC (not a medical doctor or psychologist).

Everything he is discussing is TENTATIVE but very interesting. I'm sending this out now because there is so little in the popular press about what can actually be done to help people with brain fog and other Long COVID symptoms. The research is still very early, and of course medical professionals should be consulted.

  1. The article link from Nature Magazine describes brain damage caused by SARS-CoV-2 related to cell death and especially to synapse loss, leading to cognitive impairment.

  2. The study in Bioelectric Medicine is extremely small, yet shows the potential of nicotine patches in the treatment of Long COVID symptoms including brain fog. (Another paper from the same publication also goes into why nicotine might help with Long COVID: https://bioelecmed.biomedcentral.com/articles/10.1186/s42234-023-00104-7 )

  3. He then points to a study on the NIH PubMed site reporting the encouragement of synapse growth from psilocybin.

  4. A comment in the discussion thread also links to a British Medical Journal article on Metformin improving Long COVID symptoms ( https://www.bmj.com/content/381/bmj.p1306 )

There's further speculation in the discussion thread that other psychoactive substances might be helpful. There are perhaps AI bots in the discussion thread discussing psilocybin microdosing, so be aware of that and maybe not get excited that so many "people" are discussing it.

From: <https://ourislandgeorgia.net/@Wolven/111412769611401616>

Dr. Damien P. Williams  

…HUH. Long-COVID destroys synapses, and is a major contributor to the brainfog. <https://www.nature.com/articles/s41380-022-01786-2>

This goes some way to shining a light on the promising results they've been seeing in testing nicotine patches as treatment for long covid: nicotine effects synapse formation and receptivity (tests using patches because they don't habit-form and aren't, y'know, SMOKE [<https://bioelecmed.biomedcentral.com/articles/10.1186/s42234-023-00104-7>]).

But what's super interesting to me is that another thing that's also been shown to encourage synapse growth? Is psilocybin.  
From: <https://ourislandgeorgia.net/@Wolven/111412769611401616>

#psychology #counseling #socialwork #psychotherapy #research @psychotherapist@a.gup.pe @psychology@a.gup.pe @socialpsych@a.gup.pe @socialwork@a.gup.pe #Vaccines #COVID #longcovid #science #medicine #hospital #brainfog #sarscov2 #metformin #nicotine #nicotinepatch #psilocybin
8petros, to polska

Prof Rzeszutek mentions that globally, PTSD is recorded on average in about 5-10 per cent of the population, in Central Europe in 1-4 per cent, in the USA in 4-8 per cent and in Africa in more than 10 per cent.

The new study included a representative group of Poles (almost 1 600 people). It turned out that the percentage of people with PTSD in Poland is surprisingly high: it amounts to as much as 19 per cent (it is mentioned in a publication in PLOS One) "And this means that Poland is - as far as we know - the most traumatised country in the world". - assesses Prof. Rzeszutek.

Long-lasting effects of World War II trauma on PTSD symptoms and embodiment levels in a national sample of Poles - Scientific Reports

xtaldave, to nauka
@xtaldave@xtaldave.net avatar

Remind me to tell y'all about this ~700kDa monstrosity in the morning...

EDIT: Now with explainer thread ⬇️

Houghton, F.M., Adams, S.E., Ríos, A.S. et al. Architecture and regulation of a GDNF-GFRα1 synaptic adhesion assembly. Nat Commun 14, 7551 (2023). https://doi.org/10.1038/s41467-023-43148-8



bibliolater, to nauka
@bibliolater@qoto.org avatar

"Our approach consists of a pipeline with two components: a sign detector and a wedge detector. The sign detector uses a RepPoints model with a ResNet18 backbone to locate individual cuneiform characters in the tablet segment image. The signs are then cropped based on the sign locations and fed into the wedge detector. The wedge detector is based on the idea of Point RCNN approach. It uses a Feature Pyramid Network (FPN) and RoI Align to predict the positions and classes of the wedges. The method is evaluated using different hyperparameters, and post-processing techniques such as Non-Maximum Suppression (NMS) are applied for refinement."

Stötzner E., Homburg T., Bullenkamp J.P. & Mara H. R-CNN based Polygonal Wedge Detection Learned from Annotated 3D Renderings and Mapped Photographs of Open Data Cuneiform Tablets. GCH 2023 - Eurographics Workshop on Graphics and Cultural Heritage. doi: http://dx.doi.org/10.2312/gch.20231157 @science @archaeodons

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