<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: koalahedron</title><link>https://news.ycombinator.com/user?id=koalahedron</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Mon, 06 Apr 2026 03:04:48 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=koalahedron" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by koalahedron in "It Can Happen to You"]]></title><description><![CDATA[
<p>Even greater is someone understanding my own sardonic sense of humor and putting it to good use.<p>I did have a nice half round of golf today with my wife. What a beautiful day to spend with such a wonderful person!<p>I'm out.</p>
]]></description><pubDate>Fri, 05 Mar 2021 17:14:03 +0000</pubDate><link>https://news.ycombinator.com/item?id=26359219</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26359219</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26359219</guid></item><item><title><![CDATA[New comment by koalahedron in "The Air Force is having to reverse engineer parts of its own stealth bomber"]]></title><description><![CDATA[
<p>20 years later, looks like they are taking RFPs for re-engining:<p>[PDF]
<a href="https://crsreports.congress.gov/product/pdf/IN/IN11413" rel="nofollow">https://crsreports.congress.gov/product/pdf/IN/IN11413</a><p>I guess he was right about the engines.</p>
]]></description><pubDate>Fri, 05 Mar 2021 03:57:52 +0000</pubDate><link>https://news.ycombinator.com/item?id=26352479</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26352479</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26352479</guid></item><item><title><![CDATA[New comment by koalahedron in "It Can Happen to You"]]></title><description><![CDATA[
<p>> I know that jokes aren't really welcome on HN<p>IMO, while I really don't come to HN to find dial-a-joke, or joke-of-the-day, I think some humor is essential in modern life.<p>Since we're talking about Matt Keeter, you will find he has a great sense of humor if you read his website or interact with him.  Some of his jokes are ROTFL funny, but subtle.</p>
]]></description><pubDate>Thu, 04 Mar 2021 22:03:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=26349064</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26349064</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26349064</guid></item><item><title><![CDATA[New comment by koalahedron in "It Can Happen to You"]]></title><description><![CDATA[
<p>I know Matt too, primarily from him rejecting my Libfive PRs for being "<i>too</i> 1337".<p>But seriously, Matt, I might have a project for an in-person event regarding printing robots.  Stay tuned--to what channel I don't know.</p>
]]></description><pubDate>Thu, 04 Mar 2021 19:23:05 +0000</pubDate><link>https://news.ycombinator.com/item?id=26346909</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26346909</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26346909</guid></item><item><title><![CDATA[New comment by koalahedron in "Don Lancaster's Guru's Lair Home Page"]]></title><description><![CDATA[
<p>Thanks!  I noticed "PAiA" electronics sold kits of these--I remember that name from back then.  Did they sell parts or other kits?  Looks like they are still in business.<p>Also noticed "Scungy Video" :) (Do <i>NOT</i> search for this term in your favorite search engine.)</p>
]]></description><pubDate>Thu, 04 Mar 2021 19:02:24 +0000</pubDate><link>https://news.ycombinator.com/item?id=26346624</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26346624</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26346624</guid></item><item><title><![CDATA[New comment by koalahedron in "The Air Force is having to reverse engineer parts of its own stealth bomber"]]></title><description><![CDATA[
<p>I worked at Boeing Wichita (which is no more), and an engineer told me that the B-52 was getting heavier over time because the old wires weren't removed for avionics upgrades.  Of course, they were always trying to put one over on me as a newbie (I worked on avionics S/W in Ada for the tankers).<p>He also said a big problem was the expense of doing a modern engine upgrade.  Anyone know if they ever re-engined it?  Was he joking again?<p>Having one of these fly over my apartment on Rock Rd. was a dish rattler--I used to see B-2s every once in a while too (fairly loud too, IIRC).</p>
]]></description><pubDate>Thu, 04 Mar 2021 18:28:00 +0000</pubDate><link>https://news.ycombinator.com/item?id=26346150</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26346150</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26346150</guid></item><item><title><![CDATA[New comment by koalahedron in "A Cephalopod Has Passed a Cognitive Test Designed for Human Children"]]></title><description><![CDATA[
<p>My wife sent me these that she has read and recommends:<p>Textbooks:<p>Cephalopod Cognition
by Anne-Sophie Darmaillacq (Editor), Ludovic Dickel (Editor), Jennifer Mather (Editor)<p>Cephalopod Behaviour 2nd Edition
by Roger T. Hanlon (Author), John B. Messenger (Author)<p>Personal anecdotes:<p>The Soul of an Octopus: A Surprising Exploration into the Wonder of Consciousness Paperback
by Sy Montgomery</p>
]]></description><pubDate>Thu, 04 Mar 2021 04:25:19 +0000</pubDate><link>https://news.ycombinator.com/item?id=26338575</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26338575</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26338575</guid></item><item><title><![CDATA[New comment by koalahedron in "A Cephalopod Has Passed a Cognitive Test Designed for Human Children"]]></title><description><![CDATA[
<p>Taken further, you might argue that there might be condemnation eventually of the whole concept of pets and work animals too.  I'm not sure I "condemn" these ideas, but I don't have a pet because I think animals should be wild.  I make my own ethical comprimises, though, don't get me wrong.<p>Harry Harrison wrote a book I read many years ago called West of Eden, where the dinosaur extinction event didn't occur.  An advanced species of lizard used modified lifeforms for their tech.  I have it on my list to read again.
It does make you think people might be more symbiotic towards the world rather than what we have now.</p>
]]></description><pubDate>Wed, 03 Mar 2021 19:06:38 +0000</pubDate><link>https://news.ycombinator.com/item?id=26332905</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26332905</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26332905</guid></item><item><title><![CDATA[New comment by koalahedron in "A Cephalopod Has Passed a Cognitive Test Designed for Human Children"]]></title><description><![CDATA[
<p>Thanks all, for these references!  My wife is into cephalopod intelligence.  I'll forward this to her and ask if she has any other recommendations.<p>I do know there are a couple of websites for cephalopod enthusiasts:<p><a href="https://zapatopi.net/cephnews/" rel="nofollow">https://zapatopi.net/cephnews/</a>
<a href="https://tonmo.com/" rel="nofollow">https://tonmo.com/</a></p>
]]></description><pubDate>Wed, 03 Mar 2021 17:11:12 +0000</pubDate><link>https://news.ycombinator.com/item?id=26331335</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26331335</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26331335</guid></item><item><title><![CDATA[New comment by koalahedron in "A Cephalopod Has Passed a Cognitive Test Designed for Human Children"]]></title><description><![CDATA[
<p>I've never heard of Rick and Morty, but take my advice, don't try to shop your screenplay to VCs.  They took a dim view of my "Adult Stewie" concept last year (think "Young Sheldon" backwards).  Try Hollywood.<p>Anyway, I think a fun cartoon would be the Flintstones with ceph, for example their screen could be a smaller ceph whose chromataphores are pixels.<p>[edit]<p>Old drawing, back of a napkin (apologies to MIT AI Memo 554):<p><a href="https://github.com/koalahedron/ideas-for-models/blob/main/README.md#ceph" rel="nofollow">https://github.com/koalahedron/ideas-for-models/blob/main/RE...</a></p>
]]></description><pubDate>Wed, 03 Mar 2021 16:47:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=26330925</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26330925</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26330925</guid></item><item><title><![CDATA[New comment by koalahedron in "Don Lancaster's Guru's Lair Home Page"]]></title><description><![CDATA[
<p>> Nevertheless simultaneous invention happens all the time.<p>Try telling that to Isaac Newton. :)<p>Or better yet Edison or the USPTO.</p>
]]></description><pubDate>Wed, 03 Mar 2021 14:28:43 +0000</pubDate><link>https://news.ycombinator.com/item?id=26328703</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26328703</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26328703</guid></item><item><title><![CDATA[New comment by koalahedron in "Don Lancaster's Guru's Lair Home Page"]]></title><description><![CDATA[
<p>I had that book too, I just recognized it when I looked it up.  I don't remember it as well, but apparently it was the display circuitry only.</p>
]]></description><pubDate>Wed, 03 Mar 2021 01:00:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=26323400</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26323400</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26323400</guid></item><item><title><![CDATA[New comment by koalahedron in "Don Lancaster's Guru's Lair Home Page"]]></title><description><![CDATA[
<p>> delicious recipes<p>Ha ha<p>He also did the TV typewriter:<p><a href="https://en.wikipedia.org/wiki/TV_Typewriter" rel="nofollow">https://en.wikipedia.org/wiki/TV_Typewriter</a><p>which allowed people to have something to hook their bare board micro to.<p>I had money to buy his green book, but not the computer or the TV. :)</p>
]]></description><pubDate>Wed, 03 Mar 2021 00:48:21 +0000</pubDate><link>https://news.ycombinator.com/item?id=26323320</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26323320</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26323320</guid></item><item><title><![CDATA[New comment by koalahedron in "Updating “101 Basic Computer Games” for 2021"]]></title><description><![CDATA[
<p>I think I even discovered "intentional O(random)" complexity with this gem from Acey-Deucy:<p><pre><code>  270 A=INT(14\*RND(1))+2
  280 IF A<2 THEN 270
  290 IF A>14 THEN 270</code></pre></p>
]]></description><pubDate>Tue, 02 Mar 2021 17:16:40 +0000</pubDate><link>https://news.ycombinator.com/item?id=26317638</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26317638</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26317638</guid></item><item><title><![CDATA[New comment by koalahedron in "The KimKlone Microcomputer"]]></title><description><![CDATA[
<p>By the way, back to the original topic, a bare-bones machine like the KIM-1 also required a lot of hand assembly.<p>I guess everybody is gone from this post too, but I wonder if there is a fixed point corollary to Godwin's law--if you post enough off topic comments, you reach the original topic again. :)</p>
]]></description><pubDate>Tue, 02 Mar 2021 16:56:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=26317357</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26317357</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26317357</guid></item><item><title><![CDATA[New comment by koalahedron in "The KimKlone Microcomputer"]]></title><description><![CDATA[
<p>Thanks again.  Like you said it is fun to dream (ask the "Scheme Machine" guys sometime about how they would go about it now), but practically with technology like Julia's Zygote:<p><a href="https://github.com/FluxML/Zygote.jl" rel="nofollow">https://github.com/FluxML/Zygote.jl</a><p>the efficiency of autodiff might be similar to that of an opcode anyway.<p>So, how did DEC do on the Alpha processor?  I always heard good things about it--IIRC (I didn't) it was ~~based~~ to replace the VAX, but 64 bit.  I learned PDP-11 assembler at RPI, during their college program for high school students in about 1984.  We hand assembled code and really got to know the architecture.</p>
]]></description><pubDate>Tue, 02 Mar 2021 03:12:56 +0000</pubDate><link>https://news.ycombinator.com/item?id=26311494</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26311494</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26311494</guid></item><item><title><![CDATA[New comment by koalahedron in "Updating “101 Basic Computer Games” for 2021"]]></title><description><![CDATA[
<p>Everyone's probably way past reading this by now, but for the record I ported the first example to Common Lisp:<p><a href="https://github.com/koalahedron/lisp-computer-games" rel="nofollow">https://github.com/koalahedron/lisp-computer-games</a><p>Man that brought back the memories, and I had a blast doing it.  Many thanks to Jeff Atwood.</p>
]]></description><pubDate>Tue, 02 Mar 2021 02:49:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=26311370</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26311370</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26311370</guid></item><item><title><![CDATA[New comment by koalahedron in "The KimKlone Microcomputer"]]></title><description><![CDATA[
<p>Thanks for your thoughtful comment.<p>I'm afraid my DEC assembly language study ended at the PDP-11, but it is edifying to know the VAX had such an instruction.<p>In some domains like numerical programming, ML, and graphics using SDF having a Calc <i>102</i> operation like a gradient op might be considered useful enough to include in a RISC instruction set, and the RISC entry on Wikipedia says this about the RISC-V architecture:<p>> The ISA is designed to be extensible from a barebones core sufficient for a small embedded processor to supercomputer and cloud computing use with standard and chip designer defined <i>extensions</i> and <i>coprocessors</i>.<p>Maybe a derivative op belongs in a math coprocessor?</p>
]]></description><pubDate>Mon, 01 Mar 2021 23:20:26 +0000</pubDate><link>https://news.ycombinator.com/item?id=26309879</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26309879</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26309879</guid></item><item><title><![CDATA[New comment by koalahedron in "The KimKlone Microcomputer"]]></title><description><![CDATA[
<p>I was thinking an interesting (probably not feasible) opcode would be a derivative op for automatic differentiation at the machine level.</p>
]]></description><pubDate>Mon, 01 Mar 2021 18:28:34 +0000</pubDate><link>https://news.ycombinator.com/item?id=26306159</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26306159</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26306159</guid></item><item><title><![CDATA[New comment by koalahedron in "The KimKlone Microcomputer"]]></title><description><![CDATA[
<p>I wanted a KIM-1 or a COSMAC Elf in the '70s, but I couldn't afford one as a kid.  I eventually built a ZX81 kit from the proceeds of a summer job as my first computer.<p>The KIM-1 had a 6502, the Elf had an 1802, and the ZX81 had a Z80 processor, all 8 bit processors which were approachable for beginners.</p>
]]></description><pubDate>Mon, 01 Mar 2021 18:02:47 +0000</pubDate><link>https://news.ycombinator.com/item?id=26305815</link><dc:creator>koalahedron</dc:creator><comments>https://news.ycombinator.com/item?id=26305815</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26305815</guid></item></channel></rss>