2026-04-11T23:54:12Z https://yabu.me Fanfan 🐻 🌲 🏔 https://yabu.me/npub13lvnxh64a6gg557ev2tvgghpad0fwdkt2gefamlalgx6500zs4rs65sne5 https://social.sciences.re/system/accounts/avatars/112/145/032/078/806/989/original/d9147e8ea08075d8.png https://social.sciences.re/system/accounts/avatars/112/145/032/078/806/989/original/d9147e8ea08075d8.png https://yabu.me/nevent1qqstqmecymapza48rqh6hskpvy3cglzd3l2085qnrw7nhxa996mepcszyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5waz6f6u #Physics is such an old field it&#39;s a real bitch.<br/><br/>1. Have a nice promising idea all by yourself<br/>2. Find out a well-known guy had it 30 years ago<br/>3. Refine the question so as to go further than the 1st dude.<br/>4. Find out another even better-known guy who looked at this particular question 50 years ago.<br/>5. Look at references in the paper.<br/>6. Find out that Eddington first had a look at this in the early 1930s.<br/>7. Give up and go back to your usual infinitesimally incremental shit or persevere by reading the 200 papers that you discovered along the trail of references, at the risk of facing an even more depressing surprise.<br/><br/>So, after thinking I had an original thought on Monday, here&#39;s me studying papers from a century ago to figure out if idea can be salvaged somehow.<br/><br/>#InfiniteLoop #ResearchIsHard #VisMaVieDeScientifique 2025-10-03T05:46:51Z https://yabu.me/nevent1qqstkt0c7a9t4qp3nxewq2wd3p5vqeel3avlwu85y3yexn293dvq8xszyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wv9udja In reply to <a href='/nevent1qqs8k2hh0r8lk796rhmhyx0hxg8x0jvfx8mymmtjz5mpak3lual29vqnus3kz'>nevent1q…s3kz</a><br/>_________________________<br/><br/>Thank you, I guess it means I&#39;m a considerate person in posting stuff that is not going to be a waste of people&#39;s time 😉 2025-09-03T12:15:12Z https://yabu.me/nevent1qqs9ghxlcuez5s9vul82tpnhmdtasnv5acmv6ug3n6flles0m6rwypczyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wzqf2jx In reply to <a href='/nevent1qqsv5krpztmkf09z9y3gzm57gjvh5635cerkwyh223z3a4qqtumq0dc25cxj0'>nevent1q…cxj0</a><br/>_________________________<br/><br/>ALERTE MARTIN-PÊCHEUR 🚨 #birding 2025-08-15T07:23:31Z https://yabu.me/nevent1qqsv5krpztmkf09z9y3gzm57gjvh5635cerkwyh223z3a4qqtumq0dczyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wy932ze #LeTarnCestMoche<br/> <img src="https://social.sciences.re/system/media_attachments/files/115/031/502/624/835/739/original/1ed15869e0f6e4f3.jpg"> <br/> <img src="https://social.sciences.re/system/media_attachments/files/115/031/502/976/797/913/original/a63ef7c8a78fcd72.jpg"> <br/> 2025-08-15T07:05:44Z https://yabu.me/nevent1qqsr5tzdu9s53e2sl9nlscx4ywtylprxens6kzejwh8c37ujmnlj79czyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wxny7d3 Bonjour, aujourd&#39;hui c&#39;est le jour tantadandu depuis 3 mois, safari photo-vtt avec junior sur les hauts plateaux 🤩 🥰 #levercorscestmoche 2025-07-22T07:18:22Z https://yabu.me/nevent1qqsfj2p5sr0kychjswcmat577ry2ydp64v3yvh65v90z8utn0k3r3aqzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wgjywgc Aujourd&#39;hui une toute autre ambiance avec la visite de Valchevrière. J&#39;ai fait des belles photos, dignes du lieu j&#39;espère, que je partagerai plus tard. 2025-07-18T18:53:15Z https://yabu.me/nevent1qqsq2d4kmcl4d4qyl8k6qnpvvg029mvt0aulrhlsntv68wc2r8x5ghqzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5w8u0a6f Mastoterelle #MacroPhotography #naturephotography<br/> <img src="https://social.sciences.re/system/media_attachments/files/114/852/595/697/184/146/original/e61ced10d1168c28.jpeg"> <br/> 2025-07-14T16:47:59Z https://yabu.me/nevent1qqsvdr5z9kt3ssgtp42vkh872qne8y98emeq3ms6yay3khsz4plpseqzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wmt8l6q Could someone refresh my understanding of why, oh f* why, we need to wait between 6 and 12 months to learn whether our 10% success rate grant proposals are getting funded ? What is the f* bureaucracy doing with them all that time ? Why is it so hard to ask reviewers to send a review within a month and then have a committee that figures out the few outstanding proposals and then randomly draw a few among the remaining good ones, and that&#39;s it ? 2025-07-10T09:51:39Z https://yabu.me/nevent1qqswte2gfa6azmkaep6c0aanwmyf5wgxvf4esfcgu0mm22yful6j0hgzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5w04fete So, there was quite a lot of talk, in the workshop I just returned from, about the use of machine-learning for nonlinear physics (like astrophysics, atmospheric, or ocean turbulence). <br/><br/>In the end, my take on this problem has not changed much and can be summed up as follows.<br/><br/>- It can do some rather good things (like accelerating things or making things a bit more precise) on *interpolation* problems (i.e. to do inference on problems it was explicitly trained for, in physical regimes it was trained for based on full-physics simulations), and may even help to limit the use of full-scale HPC/numerical resoures in this context IF USED SMARTLY AND REASONABLY (a big if when I look at the way many astronomers are using it).<br/><br/>- It essentially remains untrustable and uncontrolled garbage for *extrapolation* problems, i.e. to provide new results in physical regimes well-beyond those it was trained on, and beyond those that we can explicitly simulate with physics codes. It notably remains utterly terrible when there is no proper separation of scale in the problem, that is for, well, most of the hard key problems we have to deal with in this field.<br/><br/>Most of the hype is about the latter, though. The progress with interpolation/fitting is real, but is much more incremental and much less flamboyant than the hypothetical conceptual breakthroughs promised by the proponents of AI. That ML performs well on interpolation problems is not particularly a surprise or controversial in itself either, as these things are essentially giant fitting factories.<br/><br/>All of this makes it very clear that it is critical to *define* what AI means, and the kind of things one wants to apply ML or other techniques on , before any useful and reasonable conversation on their merits can be had. #AI #physics #machinelearning 2025-06-16T16:53:54Z https://yabu.me/nevent1qqswfj80d9gcnh6vsfxtjspytnv5ef4gyzp9cvz8ds73dws6vu5es7gzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wzseu2l Paper-editing session POV #SilentSunday #Science #vismaviedescientifique<br/> <img src="https://social.sciences.re/system/media_attachments/files/114/568/043/664/982/433/original/0a8d4b00cb16dcbe.jpg"> <br/> 2025-05-25T10:41:39Z https://yabu.me/nevent1qqspxx7npv7ywaxcgwcjndmtutkyq7fgr06dys44zfy40g63k40tv4czyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5whkxgvr La macro manuelle &gt;&gt; Emmanuel Macron <br/><br/>#insectodon #nature #GardenPhotography #macrophotography #FleurisTonFil #BloomScrolling<br/> <img src="https://social.sciences.re/system/media_attachments/files/114/488/695/210/859/001/original/e4d92394378379d6.jpeg"> <br/> 2025-05-11T10:21:45Z https://yabu.me/nevent1qqsrra2hfahggvgm4h7jt3df63xsz2pgxq5q0smtxrlch59rgr4vl2szyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wk9xp94 Philippe Poutou qui devient libraire, beh je suis sincèrement content pour lui, il va surement pouvoir vivre une meilleure vie et c&#39;est tant mieux comme ça. 2025-04-09T21:34:09Z https://yabu.me/nevent1qqsyrl753zp6tn3wcrme80msstctc830t3mjp5tcpvumgjplay3z85gzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wltt5ln In reply to <a href='/nevent1qqsp9fdjncjl7srsv8ez2rkwjwa2qsdqxrx7kyhtn80urqqwxaf3regq8enjy'>nevent1q…enjy</a><br/>_________________________<br/><br/>Singing in the rain #Birding #BirdPhotography<br/> <img src="https://social.sciences.re/system/media_attachments/files/114/213/532/242/516/182/original/55981d237160d6f2.jpeg"> <br/> 2025-03-23T20:04:21Z https://yabu.me/nevent1qqsxqrkcvl8q7u423v4q7pxpv4lvdxvrye5eqvf3hu8v0aq3z8rgp3qzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wlhrcaz 🧵 #Zanimo après manger 😏 #Birding #BirdPhotography<br/> <img src="https://social.sciences.re/system/media_attachments/files/114/213/242/881/715/946/original/98d11c86e15721e5.jpeg"> <br/> 2025-03-23T18:45:45Z https://yabu.me/nevent1qqsz2h4f5gy0pvrp0wtxd9h4dmusrn9svpsxz8md57g8prq4phfee6qzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wq6j49r C&#39;est nul, avec mon filtre anti Musque, tous les pouets qui parlent de trucs au mois de mars sont maintenant masqués. C&#39;est embêtant vu le calendrier. 2025-02-25T22:09:13Z https://yabu.me/nevent1qqsdqyd43xrl4azgnyr5sm5k4s5pkydes0clsqzlrx6kftz4at9aqzszyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5weya0m7 In reply to <a href='/nevent1qqs2j7sx7cnlpsqfz5lswwc22lhpxv95v0p276un4vuz5d80vpahjpgnrsyte'>nevent1q…syte</a><br/>_________________________<br/><br/>A truly wonderful flower #macrophotography #Bloomscrolling #FleurisTonFil<br/> <img src="https://social.sciences.re/system/media_attachments/files/114/031/962/751/607/016/original/94e1dfc25befcb9c.jpeg"> <br/> 2025-02-19T18:28:27Z https://yabu.me/nevent1qqs2j7sx7cnlpsqfz5lswwc22lhpxv95v0p276un4vuz5d80vpahjpgzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wa9nxry In reply to <a href='/nevent1qqs95amv6gfu3lvjm5q3z394uq5c39tgxl8vkdgt49hxtyjm6lq9f7gdwueet'>nevent1q…ueet</a><br/>_________________________<br/><br/>#Bloomscrolling 💚 #FleurisTonFil #macrophotography<br/> <img src="https://social.sciences.re/system/media_attachments/files/114/031/945/753/361/201/original/893438ddd9a435d0.jpeg"> <br/> 2025-02-19T18:24:53Z https://yabu.me/nevent1qqsfc25gz8v3kvtt90h47gmjrgayzdmu8xc53qfmhe0u02e4sg6jwvszyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5w4az8yw In reply to <a href='/nevent1qqsqnu3emnq7t3fflwsw6dqhnhpw3q348tc8qdsgpeenm5p6uyagcqgtvu00c'>nevent1q…u00c</a><br/>_________________________<br/><br/>(and it appears marking all media as sensitive by default is inefficient against that too). 2025-01-22T21:51:48Z https://yabu.me/nevent1qqsqnu3emnq7t3fflwsw6dqhnhpw3q348tc8qdsgpeenm5p6uyagcqgzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wapzxvy In reply to <a href='/nevent1qqsw0lc2qyyrrvkraz2wnskrmuq0tm4w5duevuezvknx9jdrg0kl4tga48vmm'>nevent1q…8vmm</a><br/>_________________________<br/><br/>But we may want to read the contents of the toot itself, without seing a brutal visual. So hashtag filtering is not the solution here. 2025-01-22T21:49:38Z https://yabu.me/nevent1qqsgld42pz4peg8vmn53l0djxleu8ahdhae48qjs74aqph8rvdfs97szyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5w2qqmd9 #Mastodon we have a problem with link embedding bypassing control mechanisms for exposure to shit, and showing unsollicited pictures (say, of a real bastard making a nazi gesture), without the possibility to filter that out a priori (unless people who post these links realize by themselves this displays the picture and use a CW -- but they may not be aware of this when they post, as it takes time for the embedding to show up after a post).<br/><br/>Yesterday I had to remove a link from one of my toots after realizing a posteriori what the embedding was showing. 2025-01-22T21:41:07Z https://yabu.me/nevent1qqs9xnkdgdaq9zmfjsg40hq46xvpj5xyjagrs8qzvnlzftgzhfclhpczyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wn5pur4 In reply to <a href='/nevent1qqszvh9r42pc3anpfhexrfu0casxeamx0qwtugcrh625qcvn9wc6tzsx6tzu0'>nevent1q…tzu0</a><br/>_________________________<br/><br/>Un couple plus classique, mais néanmoins choupi<br/> <img src="https://social.sciences.re/system/media_attachments/files/113/850/714/246/115/946/original/9355f8e5c2449ae9.jpeg"> <br/> 2025-01-18T18:14:36Z https://yabu.me/nevent1qqsva8yqrcjylqsst2nlwmyw7wk6twevl8zlzznzv7ktmegrvewfjdczyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5waegal8 In reply to <a href='/nevent1qqs06h2ysayp2c4yv3hsmh5lqj00me6lnmlhmzcu4zpj78rxae2nhkq73v06j'>nevent1q…v06j</a><br/>_________________________<br/><br/>Admittedly my formulation was not very clear either, I kind of fumbled in trying to question Santiago&#39;s argument without sounding harsh. Peace. 2025-01-15T22:19:52Z https://yabu.me/nevent1qqs0c7rvv0tzzt9ala47699ts9v4qhn86qpneh0fdet94jjxrwkpxyqzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5w9shv5y In reply to <a href='/nevent1qqsvkzc2dvc9x3dga2a4qf9067ncnxfe3s9cuqq5m83qtnkx7f0h3uchhl542'>nevent1q…l542</a><br/>_________________________<br/><br/>It looks like a very weak effect if the angular resolution limit due to atmospheric turbulence is <br/><br/> λ / r0 <br/><br/>and r0 goes like \lambda^{6/5} ! 2025-01-15T22:07:55Z https://yabu.me/nevent1qqs0ytr06ltg29vxs0uppy50pkpxrhq3cnxp8097zzy4sa37vcqsatgzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wykyrvq In reply to <a href='/nevent1qqs2k7arlvpsts2znddvuuc6q25czvtp0s6quc3wh9mynku38rkdydsxaqqhn'>nevent1q…qqhn</a><br/>_________________________<br/><br/>Yes thank you I know that (I&#39;m a physicist). My point is that the explanation can&#39;t be it&#39;s because of &#34;molecular scattering&#34; being different in different wavelengths if the point is to limit turbulent refraction effects. <br/><br/>The explanation appears to be that refraction effects are also smaller in IR<br/><br/><a href="https://www.astronomik.com/en/infrarot-passfilter-infrared-pass-filters/proplanet-642-bp-ir-passfilter.html">https://www.astronomik.com/en/infrarot-passfilter-infrared-pass-filters/proplanet-642-bp-ir-passfilter.html</a><br/><br/>&#34;Why Infrared? Every observer knows the flickering stars and planetary disks when looking through an eyepiece or at your monitor Slight differences in temperature and preasure result in a different index of refraction for &#34;bubbles&#34; of air. As these bubbles move, the image moves too! This effect is called &#34;Seeing&#34;.<br/>This change in the index of refraction becomes smaller the further you go to the infrared (longer wavlengths), and due to that, the Seeing becomes better too!&#34; 2025-01-15T22:04:43Z https://yabu.me/nevent1qqsrk55jfwnvhmqdmtm80uj80ngwkdrp3m5um47f3xudjar9fzwp3qczyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wda5hwk In reply to <a href='/nevent1qqsgsxcegk4gx8ud94l7aklkhqlgy462lj92f2879mdhlf83dvadghcx8mphv'>nevent1q…mphv</a><br/>_________________________<br/><br/>But turbulent refractive scattering is distinct from Rayleigh scattering ? (I&#39;ve been wondering too). 2025-01-15T21:49:36Z https://yabu.me/nevent1qqszpu99kpszslehhu3a9syemzrv56wylq76gf83g0gjfqwwx9en72czyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wj7vvjz *quote* Naturally *quote*<br/><br/><a href="https://www.theguardian.com/us-news/2025/jan/15/polluter-pay-bill-climate-disasters">https://www.theguardian.com/us-news/2025/jan/15/polluter-pay-bill-climate-disasters</a> 2025-01-15T13:23:37Z https://yabu.me/nevent1qqst6p9l84q5nvtmg9wkssevmpa6zqrlqprc35k6fnhsa7vpdlsum2czyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5w4p9g04 In reply to <a href='/nevent1qqsvthsr7hukgq32k0tuq75y0dchc0jv2wwhlvzy8dp6r86y5asgazg0qzls8'>nevent1q…zls8</a><br/>_________________________<br/><br/>they are categorizing in a thematic way, not in an account/person specific way. People are multidimensional and i don&#39;t like the idea of cataloging them in a one-dimensional way as if they were a product serving an (information) function to be consumed. That&#39;s not my vision of social media at all. 2024-11-17T16:29:23Z https://yabu.me/nevent1qqsrpwdgy89kje2k02tw58mzs70hh4ype206gjlm60usmxj0us7nt0qzyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5wwdgp6e In reply to <a href='/nevent1qqs99ms4m463ya7curtruq5enmgkhlauefzhg76wvzm7qcjmf4d6qdcjm2vaf'>nevent1q…2vaf</a><br/>_________________________<br/><br/>i guess i just dislike categorizing(and mimicking other stuff) 2024-11-17T15:58:03Z https://yabu.me/nevent1qqsv9wkshw3avhz8xyj3tcvvldey87cp3ezsyd2uvcwxsv0mu0t3qaczyz8ajv6l2hhfpzjnm93fd3pzu844a9ekedfr98h0lhaqm23au2z5whf8wt6 Why do people need followpacks, and why imitate other platforms sheepishly ? Mastodon has its own discovery mechanism, it&#39;s called hashtags and you can follow them. 2024-11-17T15:12:30Z