<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: mk_stjames</title><link>https://news.ycombinator.com/user?id=mk_stjames</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Tue, 28 Apr 2026 23:38:25 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=mk_stjames" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by mk_stjames in "It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]"]]></title><description><![CDATA[
<p>In case anyone wanted technical details of the NN, I dug into the repo:<p>Its a transformer, with a CNN refiner after. Specifically, a ViT using the Hiera architecture (<a href="https://github.com/facebookresearch/hiera" rel="nofollow">https://github.com/facebookresearch/hiera</a>)<p>The Hiera ViT has dual decoder heads, one for the alpha and one for the RGD foreground, and then a small CNN refiner network to solve some artifacting in the output from the Hiera model.<p>I'd be very interested to see a long form tech talk of Niko explaining his process of learning ML ropes and building this model.</p>
]]></description><pubDate>Wed, 18 Mar 2026 10:51:00 +0000</pubDate><link>https://news.ycombinator.com/item?id=47423987</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=47423987</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47423987</guid></item><item><title><![CDATA[New comment by mk_stjames in "Raspberry Pi Pico as AM Radio Transmitter"]]></title><description><![CDATA[
<p>I want to point out that what keeps this 'OK' is that the little wire is so 'electrically short' compared to the actual wavelength at 1000khz (a real quarter wave antenna at that freq is like 75 meters)... and thus this limits the power of this 'transmitter' to probably nanowatts.<p>If the PIO pin could drive a fair amount of current at 3.3v into a long enough wire at that frequency you'd start to get into milliwatts, and AM radio is NOT a band that even amateur license operators can broadcast over a a certain power on.  FCC part 15 dictates no more than a 3 meter antenna for personal devices at AM frequencies which is what does the power limiting essentially.<p>The harmonics fall off quick enough on such a setup that it wouldn't really be a problem - but the only way to really KNOW that is to have a real solid understanding of how this 'radio' you've just made is working, meaning how that square carrier wave is really being driven off the PIO pin, and thus you need the requisite EE knowledge  and/or ham radio test equipment and experience.<p>I've seen more and more of these 'ChatGPT coded up a radio transmitter' posts and it kinda rubs me the wrong way.  I'd like to see more calculations and disclaimers for people showing some responsibility with radio, and if it drives people to studying and taking an amateur radio license test that would be for the better...</p>
]]></description><pubDate>Wed, 04 Mar 2026 19:12:57 +0000</pubDate><link>https://news.ycombinator.com/item?id=47252352</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=47252352</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47252352</guid></item><item><title><![CDATA[New comment by mk_stjames in "The TSA's New $45 Fee to Fly Without ID Is Illegal"]]></title><description><![CDATA[
<p>I fly between various countries in western Europe a dozen times a year and have done so for a decade and every single time I've boarded a plane I have had to shown a photo ID with my name on it that matches my name on the plane ticket.  Most of the time the gate agent barely looks at the ID/name, but it is required to hand it to them.  I have never once just walked on a plane without showing ID with my name on it, and I have never seen anyone in line in front of me do so, ever, and I'm talking hundreds of flights at this point.  It doesn't have to be a passport, I see older Spanish people showing their driver's license only all the time, but it has to have a photo and a name (to match the name on the ticket in some way) and be a state issued ID.  Again, they seem very lenient with that whole name matching thing and checking the authenticity of the ID (it isn't scanned, just visually inspected), but I've never seen anyone just say 'no' and get on a plane.<p>So what the hell part of the EU are you talking about where they don't ask for any ID at the point where you are boarding, whatsoever?<p>For reference, here is Iberia's page for required ID when flying, and I've seen that this is absolutely enforced every time when checking in and boarding.<p><a href="https://www.iberia.com/es/fly-with-iberia/documents/spain/" rel="nofollow">https://www.iberia.com/es/fly-with-iberia/documents/spain/</a></p>
]]></description><pubDate>Tue, 03 Feb 2026 13:36:59 +0000</pubDate><link>https://news.ycombinator.com/item?id=46870804</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46870804</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46870804</guid></item><item><title><![CDATA[New comment by mk_stjames in "The five orders of ignorance (2000)"]]></title><description><![CDATA[
<p>... And here's the first three orders mentioned in a famously quoted press conference from 2002:<p><a href="https://www.youtube.com/watch?v=REWeBzGuzCc" rel="nofollow">https://www.youtube.com/watch?v=REWeBzGuzCc</a></p>
]]></description><pubDate>Sat, 17 Jan 2026 08:13:18 +0000</pubDate><link>https://news.ycombinator.com/item?id=46656211</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46656211</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46656211</guid></item><item><title><![CDATA[New comment by mk_stjames in "Found: Medieval Cargo Ship – Largest Vessel of Its Kind Ever"]]></title><description><![CDATA[
<p>Astute observation; no canal, but there is a river outflow to a bay, whereby a ship could have carried stones from the quarry, albeit a long way around a peninsula;  it is possible that was a more effective way to get them close, and then use horse and cart to get them the last bit of distance.<p>Thinking about the logistics of such a feat at that time is wild to me for just the construction of a private residence.</p>
]]></description><pubDate>Fri, 16 Jan 2026 21:15:47 +0000</pubDate><link>https://news.ycombinator.com/item?id=46652319</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46652319</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46652319</guid></item><item><title><![CDATA[New comment by mk_stjames in "Found: Medieval Cargo Ship – Largest Vessel of Its Kind Ever"]]></title><description><![CDATA[
<p>I live in a late 18th-century rowhouse where there is large stonework for window sills/surrounds/doorways all done in a very specific pink granite that was carved from a shoreline quarry a significant distance away.  Massive stones, 100kg+ each, had to be transported by horse-drawn cart, over not-easy-terrain, a distance that would have taken two horses probably 8-9 hours per trip, and enough stones that it was probably 15-20 trips.  Let alone the effort that had to have been required to carve surprisingly square/cuboid shapes from solid granite without power tools.  It's mindblowing to me that someone was able to afford such a home construction, let alone the time taken to do it, in ~ 1790.  It isn't a particularly rare style in this neighborhood either.<p>Fast forward 200 years, and I was sweating at the cost just to hire someone to deliver new hardwood countertops from a place not much further away.  By truck. By a single person. In a single afternoon.  No horses required.</p>
]]></description><pubDate>Fri, 16 Jan 2026 02:00:05 +0000</pubDate><link>https://news.ycombinator.com/item?id=46642127</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46642127</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46642127</guid></item><item><title><![CDATA[New comment by mk_stjames in "Nvidia Kicks Off the Next Generation of AI with Rubin"]]></title><description><![CDATA[
<p>Whenever I see press on these new 'rack scale' systems, the first thing I think is something along the lines of: "man I hope the BIOS and OS's and whatnot supporting these racks are relatively robust and documented/open sourced enough so that 40 years from now when you can buy an entire rack system for $500, some kid in a garage will be able to boot and run code on these".</p>
]]></description><pubDate>Thu, 08 Jan 2026 20:15:14 +0000</pubDate><link>https://news.ycombinator.com/item?id=46545853</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46545853</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46545853</guid></item><item><title><![CDATA[New comment by mk_stjames in "AWS raises GPU prices 15% on a Saturday, hopes you weren't paying attention"]]></title><description><![CDATA[
<p>Paying a subscription for an alarm clock.  I've heard this one before! [1][2]<p>[1] <a href="https://en.wikipedia.org/wiki/Knocker-up" rel="nofollow">https://en.wikipedia.org/wiki/Knocker-up</a>
[2] <a href="https://www.bbc.com/news/uk-england-35840393" rel="nofollow">https://www.bbc.com/news/uk-england-35840393</a></p>
]]></description><pubDate>Tue, 06 Jan 2026 14:26:38 +0000</pubDate><link>https://news.ycombinator.com/item?id=46512653</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46512653</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46512653</guid></item><item><title><![CDATA[New comment by mk_stjames in "Worlds largest electric ship launched by Tasmanian boatbuilder"]]></title><description><![CDATA[
<p>I'd wager they will use what is known as a 'Float-on/float-off' ship for transport... it's rather common actually-<p>It's a ship with a very low deck line that partially submerges itself, with the center of the deck underwater deep enough so the other vessel can 'float on' over the deck.  They they pump the water back out, raising the deck above water and the boat on top it just rests flat.<p>They do this for some oil rigs as well.<p><a href="https://en.wikipedia.org/wiki/Heavy-lift_ship#Semi-submersible_ships" rel="nofollow">https://en.wikipedia.org/wiki/Heavy-lift_ship#Semi-submersib...</a></p>
]]></description><pubDate>Thu, 01 Jan 2026 14:54:03 +0000</pubDate><link>https://news.ycombinator.com/item?id=46454591</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46454591</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46454591</guid></item><item><title><![CDATA[New comment by mk_stjames in "Finding Gene Cernan's Missing Moon Camera"]]></title><description><![CDATA[
<p>Given the reputation for the cost and provenance of the cameras I'm surprised that Hasselblad passed through QC with that solder spooge at the edge that got into the frame of the film.  I mean... it's visible on all the photos.  I'm surprised that someone didn't notice that in testing before the camera left and send it back.  Hell, even if I bought a cheap camera today and every photo has a little unexposed notch in the edge I'd be pissed.  If you told me a camera was going to the moon I'd think I'd want the frame to be flawless....</p>
]]></description><pubDate>Sun, 07 Dec 2025 10:26:38 +0000</pubDate><link>https://news.ycombinator.com/item?id=46180683</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46180683</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46180683</guid></item><item><title><![CDATA[New comment by mk_stjames in "The differences between an IndyCar and a F1 car"]]></title><description><![CDATA[
<p>The table lists F1 cars as having "Carbon fiber brake calipers".<p>This is glaringly incorrect.  All current brake calipers are machined from aluminum, specifically Aluminum-Lithium or Aluminum-Copper alloys.  There is a rule denoting bulk elasticity modulus limit on brake calipers of 80 GPa, which was set just at that to allow the more exotic Lithium Aluminum alloys but to dis-allow Titanium alloys or anything else stiffer (There was experimentation with Titanium calipers in the past.)<p>Absolutely no calipers are made from composites, CF, graphite, or otherwise. 
Discs are Carbon-carbon.</p>
]]></description><pubDate>Thu, 04 Dec 2025 08:11:21 +0000</pubDate><link>https://news.ycombinator.com/item?id=46145030</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46145030</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46145030</guid></item><item><title><![CDATA[New comment by mk_stjames in "Modern cars are spying on you. Here's what you can do about it"]]></title><description><![CDATA[
<p>So you're telling me that simply walking out to the car and hitting a button inside the car is just too much of an "inconvenient experience"?<p>You know we used to have to drive the car... sometimes many miles... to a station, get out, and fill it up with a liquid fuel that costs many times more, and then drive home...<p>Seriously now- The perceived 'inconvenience' you have is the reason that so many of these connected features are being pushed and then the because the ability is there the business types can't resist the data gathering that became possible because of all the antennas, etc.</p>
]]></description><pubDate>Mon, 01 Dec 2025 00:04:31 +0000</pubDate><link>https://news.ycombinator.com/item?id=46101822</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46101822</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46101822</guid></item><item><title><![CDATA[New comment by mk_stjames in "A new bridge links the math of infinity to computer science"]]></title><description><![CDATA[
<p>7, if the Extremely Strong Goldbach Conjecture holds. [1]<p>[1] <a href="https://xkcd.com/1310/" rel="nofollow">https://xkcd.com/1310/</a></p>
]]></description><pubDate>Wed, 26 Nov 2025 01:59:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=46053335</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=46053335</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46053335</guid></item><item><title><![CDATA[New comment by mk_stjames in "FPGA Based IBM-PC-XT"]]></title><description><![CDATA[
<p>Really cool, I figured that was the case and I'd be in the same boat.<p>I have an ice40UP5k board but I quickly ran out of block ram and LUTS whenever trying to use it for anything substantial, but seeing this project has me itching to start something around one of these icesugar pro boards.  yosys & nextpnr support made things really damn easy when I was working with the ice40.</p>
]]></description><pubDate>Mon, 17 Nov 2025 01:52:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=45950208</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=45950208</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45950208</guid></item><item><title><![CDATA[New comment by mk_stjames in "FPGA Based IBM-PC-XT"]]></title><description><![CDATA[
<p>There is 32MB of SDRAM on the FPGA board.... I wonder exactly what using 1MB of that as the system memory would have entailed instead of the separate 1MB SRAM chip that had to be soldered.  Was using the extra SRAM chip just done just to do it, or is there a specific reason there that I'm not seeing/understanding...</p>
]]></description><pubDate>Sun, 16 Nov 2025 22:03:28 +0000</pubDate><link>https://news.ycombinator.com/item?id=45948835</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=45948835</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45948835</guid></item><item><title><![CDATA[New comment by mk_stjames in "OpenMANET Wi-Fi HaLow open-source project for Raspberry Pi–based MANET radios"]]></title><description><![CDATA[
<p>Ever since 802.11ah devices started appearing I've thought it would be perfect for partnering inside wireless IP cameras... and hell, make them mesh together with something like this so each one configured on your network extends the range of the others in it's area.  Streaming 720P H265 is easily doable at the speeds the networks achieve for a few cameras, and the range would be perfect for perimeter monitoring most properties ala farms & industrial parks.<p>This device however - an entire Raspberry Pi + hat for a router to do..? ... seems like a solution in search of a problem to solve.</p>
]]></description><pubDate>Fri, 14 Nov 2025 12:53:47 +0000</pubDate><link>https://news.ycombinator.com/item?id=45926278</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=45926278</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45926278</guid></item><item><title><![CDATA[New comment by mk_stjames in "Reverse-engineered CUPS driver for Phomemo receipt/label printers"]]></title><description><![CDATA[
<p>So, after seeing how cheap and available these Phomemo printers are and with this CUPS driver looking like a good option, my instinct as someone who also wants one of these sitting permanently on my home network as to appear all the time on all my machines' available printer options, is to get one and tether it permanently to a tiny linux SBC that has bluetooth and running the driver and print sharing.  Like the OrangePi Zero 2w I have sitting unused in a drawer somewhere collecting dust.</p>
]]></description><pubDate>Tue, 04 Nov 2025 17:43:54 +0000</pubDate><link>https://news.ycombinator.com/item?id=45813729</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=45813729</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45813729</guid></item><item><title><![CDATA[New comment by mk_stjames in "42,600 ton ship to break the world record for the deepest drill at 7 miles"]]></title><description><![CDATA[
<p>I was recently thinking about super deep drilling after coming across a very neat mini-documetary [0] self-filmed by a geophysicist around the work at the Kola superdeep borehole [1] in 1992.<p>It is project I had heard about before but only in bullshit-passing articles and scrolling past brain rot youtube videos (seriously, search 'Kola superdeep borehole' on youtube and take note of how absolutely trash every other thumbnail appears concerning what in reality is just a normal scientific endeavour). So this video by David Smythe of the actual work there was wonderful and also a nice little nostalgic look at science and research as filmed by a VHS camcorder in that era.  The computer equipment stuggles, etc...<p>It left me wondering about new research in this area and surprised I had not heard of any other such projects recently, so this news in interesting.<p>[0] <a href="https://www.youtube.com/watch?v=P4mzEGeMNAI" rel="nofollow">https://www.youtube.com/watch?v=P4mzEGeMNAI</a>
[1] <a href="https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole" rel="nofollow">https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole</a></p>
]]></description><pubDate>Wed, 22 Oct 2025 18:39:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=45673357</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=45673357</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45673357</guid></item><item><title><![CDATA[New comment by mk_stjames in "Space Elevator"]]></title><description><![CDATA[
<p>That didn't sound right to me, and so I checked it as follows:<p>Estimate for a standard classroom globe at 13" in diameter (I'm seeing a rnage of 12-14 inches as typical).  I'm reporting in inches because that is what came up first and most of the globes are for sale in the US.  Mixing units here, but, it works out.<p>But, in meters, the diameter of the Earth is 12,742,000 m on average.  if we use the 'Karman line' as defining the edge of what the atmosphere is, that is 100,000 meters.  Solving for X ... (13" / 12742000 m)=(X / 100,000 m). gives us an atmosphere thickness of approximately 0.1". -----<p>Paper glued to the globe would have a thickness of maybe, 0.004" (thin paper) to 0.012" (like a card stock paper).... so that analogy is off by an order of magnitude or more.<p>Even if you use the mesosphere as the definition for the top of the atmosphere, that is still 85,000 meters and thus similar.<p>People can check the numbers I used.<p>* Perhaps the analogy should go more like: the thickness of the cardboard sphere the globe is made out of is about the thickness of the atmosphere.  Because, having completely destroyed a globe once in my youth, I remember the cardboard shell being approximately a tenth of an inch thick.  But, that's maybe not a great reference for the analogy because not everyone has cut apart a classroom globe....</p>
]]></description><pubDate>Mon, 20 Oct 2025 19:06:56 +0000</pubDate><link>https://news.ycombinator.com/item?id=45647864</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=45647864</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45647864</guid></item><item><title><![CDATA[New comment by mk_stjames in "Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site"]]></title><description><![CDATA[
<p>The System on Module board is an Inforce 6601 SOM. [0]<p>It uses a Qualcomm Snapdragon 820 and they provide prebuilt Ubuntu Linaro distros for it, preconfigured for the board.<p>The camera manufacturer likely just tossed it straight in as configured and thus didn't know how the full disk encryption was setup.<p>This whole camera design looks like one of those 'we gave this project to some undergrad engineering students who've never designed a commercial product before and had no price target and thus it has a whole damn embedded linux system inside it for merely taking some HD video and stills triggered by some external wiring and saving them to an SD card'.<p>See also: almost any specialty medical electronic device ever manufactured.<p>[0] <a href="https://linuxgizmos.com/tiny-rugged-com-runs-linux-or-android-on-snapdragon-820/" rel="nofollow">https://linuxgizmos.com/tiny-rugged-com-runs-linux-or-androi...</a></p>
]]></description><pubDate>Sat, 18 Oct 2025 23:06:26 +0000</pubDate><link>https://news.ycombinator.com/item?id=45631008</link><dc:creator>mk_stjames</dc:creator><comments>https://news.ycombinator.com/item?id=45631008</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45631008</guid></item></channel></rss>