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mncharity

3,427 karma · joined September 18, 2016

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mncharity··on I used Claude Code to get a second opinion on my MRI
I once worked on a medical hackathon concept for computer-assisted population screening for cervical cancer in a developing nation. Community health workers take photos. The AI would look at the images, and make a call of "clearly negative" vs "clearly positive" vs "needs (scarce) expert review". But taking good photos is hard, so it's also "photos insufficient" and "worker needs additional mentorship on taking photos". Only by computes reducing all three costs - expert workload, exam success, and quality-control/training - might successful deployment be financially and logistically plausible for that nation.
mncharity··on I used Claude Code to get a second opinion on my MRI
With direct discussion, the same tendency to harmonize towards groupthink applies.

Aside from the statelessness GP mentioned, one can insert anti-conciliatory intermediation. "I saw a random claim go by, but something about it seems not quite right. What am I missing? They said: [...]." Weaponizing the bias, and orchestrating the discourse from the harness.

mncharity··on Microbubbles in Medicine
While diffusion from joint space is perfusion limited, some work suggests ultrasound might increase that perfusion? By vasodilation and microvascular recruitment, from heating and shear stress on endothelial cells. With bubble vibration and cavitation as one source of stress.

Also, though perhaps not rate limiting, ultrasound might be able to mess with the N2 bubble boundary diffusion rate.

Caveats: Very not my field; no clinical practice; mostly animal studies; mostly musculature and not joint; and under-validated AI.

Meta: But I so very much enjoy surfing literature with AI. Even with AI's rich collection of interesting failure modes. They serve as fun added encouragement to keep you on your toes, and keep clear on the gradients of your confidence.

mncharity··on For Most of the World, Open-Source AI Is the Only Way Forward
> Open weights/source doesn't necessarily mean running on local hardware, though.

And we've barely started to scratch the surface on helping open-weight models "be the best they can be", with cloud burst parallel sampling and prompt mutation. Looking for best probabilistic results for a prompt, and looking for best prompt variants for a task. Adaptively scaling computes at generation, not just training.

And speculatively, if agentic coding is naturally a multiplicity, what UX might enable human devs to dance with that quantum superposition? Rather than quickly collapsing to one monkey and its keyboard.

mncharity··on Genuinely, my all-time favourite image: Mamenchisaurus hochuanensis
Hmm. Wouldn't a long neck permit amortizing the body lift across a lot of foliage?
mncharity··on Genuinely, my all-time favourite image: Mamenchisaurus hochuanensis
Apparently there's a population of African elephants which rear up and balance to feed higher.[1]

[1] nature video starts with example: https://www.youtube.com/watch?v=3XzQ4BQe4fM short clip: https://www.reddit.com/r/NatureIsFuckingLit/comments/19bge4y... longer clip with two: https://www.youtube.com/watch?v=Jpxgqu_Cfkg

mncharity··on Help I accidentally a wigglegram
Includes repo for finding pictures taken from slightly different perspectives in a photo archive, and making wigglegrams from them.
mncharity··on The Cold War's Accidental Whale Observatory
The existence of SOSUS wasn't all upside for whale data. Startup goes to patent a hydrophone improvement for marine research. Is told it's already secretly patented, and being classified, they can't make them - thank you for playing, good bye.
mncharity··on The discovery that changed how scientists think about memory
Another flatworms-are-fun story: If you irradiate a flatworm using a nuclear reactor, to kill off its stem-cell equivalents, it sort of "rots" as other cells eventually die and aren't being replaced. If after zap, you insert donor stems, its life can instead proceed normally, and the entire body is eventually refreshed. So ship of Theseus like, you have an individual flatworm, swimming through its life, which ends up being genetically unrelated to its earlier self.
mncharity··on Google Can't Math Parsecs
Neat. Years ago I did a spike with order-of-magnitude measure sliders. So mosquito mass, with imaginary handcrank force, quickly goes relativistic. And low order 10 kg gives a picture of cat, with high order 100 bpm heart rate beeping (metabolic rate scaling with mass - whale hearts are massive and slooooow). Now with AI, perhaps one might flesh out such a space, with measures and landmarks and media and links, and survive the nightmare barrier of copyright permissions, with a more plausible level of effort. It might be fun to be able to surf an oom measure space, to develop a feel for measures and reasonable quantities.

> “atmosphere barn megaparsecs"

So say a pressure vessel, the length of a galactic cluster, with subatomic cross-section... hmm, ok, an exercise in engineering left for the reader. It seems carbon nanotubes, 1 nm^2 (1e10 barns), can do order 10 GPa, plugged with ice.

mncharity··on Millimeter wave technology drills 100 meters into granite
Fwiw, I'll share some surfing:

Nice article on an earlier demo: https://newatlas.com/energy/quaise-energy-millimeter-wave-dr... ; linked from this (nice but lots lots of ads): https://newatlas.com/energy/quaise-energy-millimeter-wave-dr... .

Company https://www.quaise.com/ on YT https://www.youtube.com/@quaise

MS thesis (2024; browsable) on the vitrified wall, for that and its intro: https://www.proquest.com/openview/624989df3cdd8055a6cee9affc...

Search for papers "Millimeter Wave Drilling for Deep Geothermal Energy Production" https://scholar.google.com/scholar?hl=en&as_sdt=0%2C33&q=Mil...

mncharity··on Local Qwen isn't a worse Opus, it's a different tool
> rerunning [...] but differently framed or worded input, and seeing how much they diverged

I'm surprised how little attention this is getting in today's comments. Open-weights means being able to afford multiple runs, space sampling, critique and synthesis.

Last night, sketching some intro biology content emphasizing cross-cutting concerns, Qwen would get sucked into the Next Generation Science Standards attractor. But nudge it by adding just one similar phrase of Chinese, and most runs ran free (outputting English but for headers with parenthesized Chinese). The multi-lingual LLM "no, not *that* region of latent space".

mncharity··on Why thinking out loud with someone beats thinking alone
Has anyone seen a good set of prompts for that disagreement? For the "skeptical eyebrow-raise" or "confused/doubtful head tilt" aspect of rubber ducks?

Agentic uses adversarial expert, steel-man opponent, risk-mitigation and failure-mode analysis. But what about almost brainstorming, but with thought-provoking nudge questions? Or on the other hand, arm-waving fight-club style discussion? Or... It's a big design space. I used to go to lots of research talks at MIT, in assorted departments. The post-talk Q&A question cultures varied a lot. Like encompassing both "leaves the speaker in tears", and "nudge so subtle, you won't quickly get it if you've not already spotted the fatal flaw in the work".

So aside from dialing down the "transformative insight!" silliness, there seems a rich multi-agent multi-persona space to explore.

mncharity··on A jacket that harvests drinking water from the air
That's "passive daytime radiative cooling" for the curious. Supporting sweat, durability, non-toxic, existing textile tech, etc, gets hard. Or perhaps, like radiator-free ships in The Expanse, Dune just didn't want to show Fremen looking like butterflies.
mncharity··on New privacy frontier: Europe eyes crackdown on smart glasses
I like the "service animal" analogy. But it's not that easy to escape the ethical fork/tradeoff, as the breeding of universal companions would be far better resourced than that of service animals. Then it's not "only some people are allowed to have cell phones", it's more "we'll ban cell phones and if someone really really has needs, we'll let them have a milk-carton brick of a radio telephone", with an implicit "and that will be good enough for them".
mncharity··on New privacy frontier: Europe eyes crackdown on smart glasses
I've long since given up on seeing thoughtful policy space discussion, here or anywhere, but I see drdaeman's 'I need assistance in recognizing faces' being downvoted here today, so briefly...

Europe and the US have had different legal perspectives on public photography, and each has had both costs and benefits. Perhaps those contrasts could help inform discussion.

As with any tech in its infancy, thought experiments might illuminate options. I suspect few here would object to a camera feeding only a chip which outputs only hand pose for gestural UI. What if that chip output a facial UID, for help with 'hey, that's someone I know', and that UID was transient and never left the glasses? What if that UID was sent to Meta for arbitrary monitization? If the last two drew different answers, then perhaps the downvoted suggestion to regulate the use, not the camera, might deserve discussion.

Notable elephants in the room include: Trust - with societal lying normalized, and misrepresentation pervasive in policy discourse, it's not unreasonable to suggest that we're societally incapable of regulating use, so broad prohibitions are the only policy tool available. Imperial conservative stagnation - as with drone's "yes it could be an economically transformative technology, and a militarily critical industry, but at every stage of its exploration, it must be perfectly safe(tm)!" (the emph bit heard here on HN) - turning your back on modernization and reform has consequences when you have rival states. Privilege - having done dementia caregiving, there are lots of people whose lives would be profoundly improved by having ride-along see-what-they-see AI companions - "Did I have dinner? Yes, 10 minutes ago. You had X. Maybe you'd like a snack of Y to get more protein?" - even a valid claim of "this tech would hurt me" deserves a pause for "but how might it help others?".

I wish we had some social tech to facilitate doing better at this kind of discussion.

mncharity··on A dumpster arrived behind my university's library
Years ago I did an exploratory UX spike, an attempt to make history more tangible, by giving each day a dot (so a couple of centuries fit on a screen), with the dots providing, among other things, scans of that day's newspapers and magazines. Nice for browsing/surfing history. Part of not pursuing it further, was newspapers - and historically there were many many more newspapers per region, let alone per person - newspapers were already mostly paywalled, and becoming less available with time. Even libraries which did their own scanning of archived local papers, would grow tired of support, and turn them over for paywalling. My understanding was there was little money in it, but all it takes is enough to scatter moats everywhere, to make a terrain inaccessible to broad access.
mncharity··on Mouseless – keyboard-driven control of macOS/Linux/Windows
> They stopped selling them

Ouch. Thanks for the catch.

On ebay just now, there's someone claiming they have "more than 10 available".

mncharity··on Mouseless – keyboard-driven control of macOS/Linux/Windows
> To the point of making it harder to find a job

Fwiw... (1) Lenovo sells compact keyboards with trackpoint. USB and bluetooth. There are mouse buttons below Space, but it cuts off there, with no pad. I once taped a kludgy bare usb pad to one, which was ok, but the extra couple of cm separation was annoying. I considered grinding out some of the case, but don't recall if that turned out plausible. (2) Lenovo has tablets with detachable keyboards, with both trackpoint and touchpad. People have DIYed such (from an old X1) into a USB kbd - the pogo pins did USB. Lenovo currently sells a replacement kbd for the X12, but I don't know if its similarly DIYable. (3) Assorted other manufacturers make, or have made, kbds with devices resembling touchpoint, more or less. (4) Some note ancient Lenovo IBM SK-8840 PS/2 Wired Keyboard With TrackPoint still show up on ebay, fwiw.

mncharity··on A Man Who Reads Books for a Living (One Every Two Days)
"I read books [...] I've read a couple of books a week for [...] 50 [years]"[1] - Jim Keller (CPU designer) with Lex Fridman.

[1] https://www.youtube.com/watch?v=Nb2tebYAaOA&t=5039s

mncharity··on What appear to be biochemical processes may be a natural feature of geology
"There's strikingly little agricultural innovation in this corner of France" they mused... as the ground shook from tanks and shrapnel bursts.

A glass of sea water seems so peaceful... with its turbulent combat hellscape of voracious protists and viral shrapnel, where you're lucky to make it through a day without being eaten or lysed.

mncharity··on What appear to be biochemical processes may be a natural feature of geology
> stacking "search accelerators" ([...])

On my long-term todo list, is making a didactic simplified tree-of-life, compressed reflecting highly conserved microRNA families (perhaps also Hox clusters and TF transcription factor families) as a regulatory complexity budget, expanding and refining. Traditional presentations obscure the stacking, for example making primates seem just another mammal, instead of a "WTF happened there".

mncharity··on United Airlines 767 returns to Newark after Bluetooth name sparks alert
> To be clear no one actually thought it was a problem

[1] Susan Kare https://kare.com/ at EG8 (2014) https://www.youtube.com/watch?v=Jlb77dDHIXQ&t=273s

"I designed this image [unhappy Macintosh] and this bomb because I was told they would never be seen by anyone! So I thought I could be a little irreverent. But unfortunately, that was not the case."

"The programmers truly thought at the time that they would be deeply hidden. I know that right after the Mac shipped we were in our software area and a call came in fielded through Apple and it was a woman who was using MacWrite, and it had crashed, and she was afraid her computer was going to blow up! So, I felt kinda bad!"

Transcript from http://jimrattray.net/blog/2014/7/1/on-designing-an-iconic-b... .

mncharity··on All of human cooking compressed into 2 megabytes
Preview[1] available on Google Books.

[1] https://www.google.com/books/edition/Ratio/yXwYoXmYTD4C

mncharity··on Project Glasswing: An Initial Update
> write trivial to avoid memory corruption bugs because they were thinking about [something else] [...] defects [...] written by people that know better, but the bug introduced was orthogonal to [their focus]

For whatever reason, hadn't associated the inattentional blindness of bug writing with the invisible gorilla experiment and car crashes - selective attention fails. People looking right at the gorilla strolling into production while chest thumping, but not seeing it, for a focus on passing basketballs. That's quite an image. Tnx.

mncharity··on The History of ThinkPad: From IBM’s Bento Box to Lenovo’s AI Workstations
A laptop to be carefully padded for protection... of people's walls and floors.

Getting a bit geriatric now, but we've had fun.[1]

[1] https://imgur.com/a/keyboard-cam-Z1VipaL

mncharity··on Ratty – A terminal emulator with inline 3D graphics
> I use it to render entire GitHub repos in one go

Nifty.

Some scattered thoughts...

First-time visitors easily bounce away if there's friction. My experience was: After reloading the page to reread the "load a repo" message, it took a search to find it. Two-fingers unexpectedly panned not zoomed. I consulted the keyboard shortcuts found earlier. My scroll panned. Keys zoomed, but speed was limited by key autorepeat. No response when clicking on shortcuts, suggesting they can't be changed. I eventually noticed shift-two-finger zoomed.

So perhaps add an initial popup, as with browser games, giving basic orientation/keys? And perhaps have some default repo already loaded?

Is antialiasing turned off? The text is less readable than I'd expect, and there's flicker during zoom.

I didn't find the usual github-icon link to the repo. Add it?

Perhaps try google/bing maps-like zooming towards cursor location, rather than always towards center?

Perhaps clamp zoom-out and scroll so one can't reach no-text-visible blank black screen? Perhaps clamp zoom-in earlier, so "slam inward" stops short of the current one-line-high screen?

Clicking README.md brings up a 3 column render, which is too small to read on my screen without further zooming. I'm unclear on what I'd like instead.

A big picture observation. Early phone apps did skeuomorphic UIs - a calendar app might render a wire binder spine, and animate paper page turning, with sound effects. It helped onboard a user population unfamiliar with phones. We don't do that anymore. It'd be silly. Most VR UIs seem to me skeuomorphic transients. Why hobble ourselves by unnecessarily importing the severe constraints of a Euclidean physical world?

So for example, file presentation might combine content-aware and location based scaling. A README might show up with the header lines enlarged, as in some md editors, and perhaps with fisheye-like distortion (when at the top, the top is rendered normally, but with increasing shrink below). Or mix in outliner-like expand/collapse. And so on. Whatever dynamic geometries are task helpful for the human. Once text colorization is working, it might be fun to work little exercises (make videos?) - with files X and task Y, how might they be most helpfully presented? When skimming agentic markdown as it scrolls by, I keep wishing for a couple of cloud-fast small models that watch it with me, and adjust the text size/color/annotation/etc to guide my attention to notable bits.

In the vein of making functionality easy to explore, perhaps give diff a default pr?

It's neat to see a repo slurped into something like this. Thanks for sharing.

mncharity··on Ratty – A terminal emulator with inline 3D graphics
A couple of comments here mention using this in VR. Fwiw, years back I played a bit with shallow-3D UIs for software dev. Shallow like within a few cm of a laptop display, to minimize VAC eye strain for all-day use. Think more being able to layer and draw in color, but in 3D, rather than waving arms in a room.

The 3D can be wiggle 3D, or perspective from webcam head/eye tracking, or stereo from shutter glasses, or XR HMDs. Wiggle is easiest - just move the object orientation back and forth. Cute but distracting. Well, cross/parallel-eye gaze is easier, but limited - ok for little UI test swatches. Perspective is more subtle, less intrusive. Can be simple with a head tracker driving a single orientation, or go all in with eye pose (for distance) and window locations, to do an accurate 3D render. App stereo pairs can be "I give you two windows Left/Right-eye", or "alternating L/R view, labeled/synced/polled". Other possibilities. Many of these need window system/manager/desktop support. I found a lot of leverage in using a stack of electron and X.

It's fun to displace text in 3D. Like colorization, but more so. And if you don't mind a cluttered appearance, you can add secondary information layers segregated by depth. And... etc. Emacs with characters-have-a-depth finally gets you something LispMs didn't have. Fun aside, to explore possibilities with code text, with anything not inherently 3D, far easier to prototype UX with fg/bg colors, fonts, unicode, and animation. Or in browser, overlaid divs and transparent 2D/3D canvases.

mncharity··on Biology is a Burrito: A text- and visual-based journey through a living cell
Thanks for the sys bio robustness papers.

Regards such cross-cutting insights, I'm tempted to see what an LLM, given a order-100 author tome, where the expertise is applied mostly silo-wise, might make of something vaguely like "Edit this to emphasize modularity (see doc). And weave that story across chapters. And...". But I suspect a good breath-wise pass would require similar order massed expertise.

Hmm... just now doing a quick and sloppy spot check, suggests current AIs might be coaxed to draft a "simplified tree of life" using the regulatory miRNA family ratchet (and Hox clusters, TF families) as a lineage regulatory/complexity budget. That's potentially much easier to do than it's been in years past. So maybe the blocker of "massive expertise resources required, but there's little incentive", might be destabilized by AI?

> Later, [...] connecting, and biology becomes lots more interesting and actually easier to study

So my question is, can this be done much much earlier? A kindergarten sci ed person suggested their kids have a human right to understand their world now, not a lifetime (for them) later. Seems an intriguingly audacious goal. Riffing on above, might one create a K-accessible/empowering fun little tree of life?

Our collective focus seems elsewhere. From MCAT to early primary, I've heard "Yes, <that> would be a nice way to explain <concept>, providing better understanding. But my students are soon taking <next high-stakes exam>, and that's not on the exam. Our time together is limited, so I'd be doing them a disservice if I <didn't teach to the test>."

Perhaps the texts are fine and something extra is needed. A formative AI tutor? Or perhaps texts and tests could use a massive refresh. Or perhaps something non-textual is needed. Tens of hours living in novel AR cell sims? Or some combo. But I find the status quo rather piteous.

Viewing science education as disaster triage chain of care, there's a distinction between stabilization and patient packaging, just surviving handoff vs not having to redo. If intro genetics is burning time on something which could have been taught in primary but wasn't, and was taught unsuccessfully in middle school, again in HS, and again in intro bio... maybe change is needed and available? Order-of-magnitude size is a part of most every physical sciences intro class, and there was a NSF "nanotech" push to primary, so how many times and years might a first-tier med student have been "taught" it, 10-ish?, before having little clue how big a red blood cell is?

One teaches with the students, outcomes, and material at hand. So material which pervasively leverages scaling doesn't exist; and outcomes don't require/permit it; and students have no sense of scale; so such material would be undeployable; and sci ed research doesn't deal with the undepoyable; so we've no idea what it might look like or gain; so there's little research funding; and thus little progress over time. I think of us as being wedged, or in a local optimum with search temperature dialed unhelpfully low.

Sorry for my latency. Thank you again for the comments.

mncharity··on Using “underdrawings” for accurate text and numbers
> deterministically

But won't it be fun when we can cloud burst-parallel a grid/tiled sampling of multiple code implementations/architectures, and interactively explore navigate/blend-points-in the latent design space. Multiples embodying different trade-offs, styles, clarity vs performance, etc. Code as generative art. What might the software engineering equivalent of designer moodboards be?

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