Posts by albertcardona@qoto.org
(DIR) Post #APADTqFFCzseMTkhiC by albertcardona@qoto.org
2022-11-01T15:20:11Z
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Is there any setting to switch on seeing posts in all federated servers? If I visit the profile of some people in other servers, their posts often don't show. It says e.g., "23 Posts" but only 1 post is listed in their timeline.I also see different behaviour between the website and the iOS app. For example, the website at qoto.org lets me write 65535 characters per post, whereas the app limits me to 250 or so, even if it displays longer posts just fine. Is this a setting that can be adjusted somewhere? The app seems to have few visible settings.#mastodon @freemo
(DIR) Post #APADyeCS2eXDyv8RX6 by albertcardona@qoto.org
2022-11-01T15:29:01Z
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@freemo Thanks very much–how interesting, to learn about the approach a distributed network takes to establish trust and manage limited resources.
(DIR) Post #APAF79hmtBlxxsPgiu by albertcardona@qoto.org
2022-11-01T15:30:08Z
1 likes, 0 repeats
@freemo Any recommended app to connect to mastodon?
(DIR) Post #APE5eHKpJyn2H5fXAe by albertcardona@qoto.org
2022-11-03T10:41:35Z
0 likes, 1 repeats
"Post-embryonic remodeling of the C. elegans motor circuit" by Ben Mulcahy et al. 2022 (Mei Zhen's lab https://zhenlab.com/)... in which the authors show, using #vEM and #connectomics, that while the nematode #celegans nervous system grows from ~200 neurons in the hatchling to ~300 in the adult, the addition of new neurons doesn't disrupt existing motor function, but new circuits are formed that endow the animal with new behaviors such as bending.Interestingly, in the course of larval maturation one neuron type inverts its polarity: what was the dendrite becomes the axon, and viceversa. And this is accomplished not with retraction and regrowth of the arbor, but rather, by flipping the synapses in situ.URL: https://doi.org/10.1016/j.cub.2022.09.065#readingpapers #science #neuroscience #development
(DIR) Post #APH1rMtK9o66vhfdyK by albertcardona@qoto.org
2022-11-04T21:08:40Z
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@freemo, is there perhaps something about the scholar.social server that prevents the #qoto server from reading it? Can't seem to reach people there.
(DIR) Post #APHCiLpRpyGIWXlDJQ by albertcardona@qoto.org
2022-11-05T00:17:48Z
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@freemo Oh my. Thank you for taking the time to share this piece of history. And thank you for generously hosting us all and maintaining such a good, supportive, constructive environment. It is not easy and it is very appreciated.
(DIR) Post #APL4AloracChzOcd3w by albertcardona@qoto.org
2022-11-06T21:00:58Z
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@freemo @zleap @meeper @nova @sarvo @waifu Same here, as far as I can tell, having browsed #QOTO https://qoto.org in depth and breath, I have only found good vibes, an excellent atmosphere, lots of academics recently joined (I happen to be one), and great features too not available elsewhere (here is to hoping these aren't too hard to rebase on top of the new mastodon release). Thanks so much for running this instance!
(DIR) Post #APMbLpu4ElXdUCtt6e by albertcardona@qoto.org
2022-11-07T14:13:01Z
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@skepteis I see potential for replacing whatsapp groups within e.g., students or institutions.
(DIR) Post #APRU2xJ29cC0oEl3S4 by albertcardona@qoto.org
2022-11-09T23:19:08Z
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@freemo @General So many excellent reasons why I handed over my Terry Pratchett books to my son.
(DIR) Post #APSnfNlsPyfthZiO3s by albertcardona@qoto.org
2022-11-02T15:36:08Z
0 likes, 1 repeats
On theoretical neural circuits for counting, and their biological implementation in the #Drosophila brain:"Our second model uses anti-Hebbian plasticity and only tracks frequencies within four count categories (“1-2-3-many”) ... we show that an implementation of the “1-2-3-many” count sketch exists in the insect mushroom body."From: "A neural theory for counting memories" by Dasgupta et al. 2022 https://www.nature.com/articles/s41467-022-33577-2HT @andrew_c_lin
(DIR) Post #APUj7vnXOEAlt6CnQG by albertcardona@qoto.org
2022-11-11T12:52:12Z
0 likes, 1 repeats
@freemo Agree, #programming in #haskell is exhilarating. One of my favourite papers ever on applying #haskell for fun and profit: "Exploiting vector instructions with generalized stream fusion" by Geoffrey Mainland et al. 2013 https://dl.acm.org/doi/10.1145/2500365.2500601 where the authors "describe a stream representation suited for efficient computation with SSE instructions" which compare favourably to C++ implementations.
(DIR) Post #APZB3LUvz8u3UmwfwW by albertcardona@qoto.org
2022-11-11T19:37:52Z
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Alex Gomez-Marin reviews @PessoaBrain ’s latest book, “The entangled brain”:“…offers a way to construe the brain as a fully integrated organ, a framework that “while not rare, is also not mainstream among neuroscientists.” A “divide-and-conquer strategy” has produced ever more refined brain maps, he argues, and subsequent leaps from structure to function. However, not only are anatomical brain areas far from simply located units of cognition but, as the subtitle of the book makes explicit, perception, cognition, and emotion are also interweaved.”“In turn, proper anatomy calls for embryology. And, as tackled later in the book, evolution also informs brain organization. Disciplines, we learn, are entangled too.”https://www.science.org/doi/10.1126/science.ade8689#neuroscience #science #brainQT: https://mstdn.science/@leafs_s/109323026178500338
(DIR) Post #APZB3MCXN1mVg1LUuG by albertcardona@qoto.org
2022-11-11T19:44:07Z
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@PessoaBrain If the idea of studying brains as a whole appeals to you, apply to my lab or reach out to collaborate. That’s what we do, or at least, aim for.
(DIR) Post #APZB3MvueK4rwkZjdI by albertcardona@qoto.org
2022-11-11T20:47:18Z
0 likes, 1 repeats
@PessoaBrain As an electron microscopist, every time I image a partial volume of the brain, I notice how most inputs and outputs of the neurons within originate in neurons outside the imaged volume. #microscopy As a neuroscientist, when I reconstruct a neuron from #vEM I see that its inputs are collected from one or more brain areas, and its outputs target one or more other areas. There are local neurons but these are the exception. #neuroscienceAs a programmer, I see that a software function can't be studied or understood in isolation, unless it''s a pure function, which is rare. Even functional programming languages such as #clojure or even #haskell require a fair share of non-pure functions in order to interact with the broader world.As a developmental biologist, I see how one neuron is made after another in precise spatio-temporal patterns essential to assembling the correct circuit architecture. The study of any one neuron only makes sense within the context of the other neurons, and glia, and blood vessels, and more. #DevBioAs an evolutionary biologist, I notice how the fitness of an individual depends not on this or that neuron, but rather, on the effect, recursively, of one neuron on many other neurons. Brain modules are not pure, not enclosed, but mere shorthand to refer to broad chunks of an indivisible whole. Crutches for our present inability to grasp a collective so large and complex.Yet the unit of selection is not even the whole brain, or the whole individual organism, but the population with its many relationships across its individuals, and even beyond, the interrelated collective of species that we call an ecosystem. Ecosystems are also under selection pressure, and they change. We are changing ours now. #evolutionWhole brains, whole individuals, whole ecosystems. Ultimately, the whole planet, as eloquently articulated by Lynn Margulis and Dorion Sagain in their 1989 book "Biospheres from Earth to Space". But I am satisfied, in the short term, with the study of the brain as a whole.
(DIR) Post #APu40h6QY3XhCHG6u8 by albertcardona@qoto.org
2022-11-22T09:28:50Z
1 likes, 0 repeats
@entospace Carrion bees, also known as vulture bees, make "meat honey": "a decay-resistant edible glucose product resembling honey". The details of how it's made read gruesome: https://en.wikipedia.org/wiki/Vulture_bee#nativebees #vulturebees #entomology