<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: hwillis</title><link>https://news.ycombinator.com/user?id=hwillis</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Wed, 02 Sep 2026 16:35:14 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=hwillis" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by hwillis in "Smaller reactors bring nuclear power closer to fulfilling its promise"]]></title><description><![CDATA[
<p>> Just look at how hard it's been to protest all the new gas plants that came up over the last ~20 years.<p>People have been talking about SMRs being the economic future for over 70 years.  It has not happened because it not true.</p>
]]></description><pubDate>Fri, 28 Aug 2026 20:23:48 +0000</pubDate><link>https://news.ycombinator.com/item?id=49483757</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=49483757</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49483757</guid></item><item><title><![CDATA[New comment by hwillis in "Smaller reactors bring nuclear power closer to fulfilling its promise"]]></title><description><![CDATA[
<p>And a contrasting article from IEEE: <a href="https://spectrum.ieee.org/the-forgotten-history-of-small-nuclear-reactors" rel="nofollow">https://spectrum.ieee.org/the-forgotten-history-of-small-nuc...</a><p>> Samuel B. Morris, the general manager and chief engineer of Los Angeles’s Department of Water and Power, traveled all the way to Geneva in 1955 to attend the first International Conference on the Peaceful Uses of Atomic Energy. There, he made a case for small reactors, arguing that because the “number of small units…is many times the number of large units,” there could be “economy in development and repetitive manufacture” of the small units.<p>> But nothing in the history of small nuclear reactors suggests that they would be more economical than full-size ones. In fact, the record is pretty clear: Without exception, small reactors cost too much for the little electricity they produced, the result of both their low output and their poor performance.<p>For me, SMRs don't pass the smell test.  Buying one big plot of land for a reactor, building one power interconnect, having a localized water impact is way easier and cheaper than many.  Even if its cheaper to build small reactor vessels, MANY of the other costs become more expensive in larger numbers.  Costs that you can ignore while you're just building a prototype.<p>If it's so much cheaper to build multiple small reactors, just build one big plant with 24 small reactors.  Thing is the nuclear reactor part is only 10-15% of the plants full cost: <a href="https://world-nuclear.org/information-library/economic-aspects/economics-of-nuclear-power" rel="nofollow">https://world-nuclear.org/information-library/economic-aspec...</a></p>
]]></description><pubDate>Fri, 28 Aug 2026 13:23:57 +0000</pubDate><link>https://news.ycombinator.com/item?id=49478130</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=49478130</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49478130</guid></item><item><title><![CDATA[New comment by hwillis in "Cops Used Flock to Track a Man Across State Lines for a Pretextual Weed Search"]]></title><description><![CDATA[
<p>1. those charges were dismissed<p>2. the article address that specifically:<p>> The case is an example of Flock cameras being used to arrest a wanted alleged criminal suspected of committing a violent crime. But it is also an example of police surveillance overreach *in that the cameras were specifically used to create a pretext to tack on additional petty crimes* based primarily on where a person’s vehicle had traveled.</p>
]]></description><pubDate>Wed, 05 Aug 2026 15:56:35 +0000</pubDate><link>https://news.ycombinator.com/item?id=49184642</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=49184642</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49184642</guid></item><item><title><![CDATA[New comment by hwillis in "Why is everyone trying to build a solid-state battery?"]]></title><description><![CDATA[
<p>dendrites are not really a significant problem in popular batteries.  It's associated with lithium metal, vs lithium in normal batteries is in the form of salts.  Solid state lets you use metal, which is much more energy dense since you don't need the salts.<p>The most common lithium battery failure mode is that you have a hole in the plastic separator between the +/- sheets inside the battery, which shorts and causes a hotspot that eventually starts a fire.  Dendrites cause the short by growing across the gap.  In normal batteries it is caused by a manufacturing defect.  The outcome is pretty similar.</p>
]]></description><pubDate>Thu, 30 Jul 2026 16:31:20 +0000</pubDate><link>https://news.ycombinator.com/item?id=49112293</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=49112293</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49112293</guid></item><item><title><![CDATA[New comment by hwillis in "Why Is Everyone Trying to Build a Solid-State Battery?"]]></title><description><![CDATA[
<p>The energy "stored" in the light oil electrolyte of a battery is >10x more than the electrical energy or the energy released by reacting lithium alone.<p>An 18650 battery weighs ~50g and stores ~10 watt-hours.  10 watt-hours is 8,604 calories, enough to heat 50g of water by 172 C or 310 F.  The battery would not even burn without a liquid electrolyte to ignite.</p>
]]></description><pubDate>Thu, 30 Jul 2026 16:26:12 +0000</pubDate><link>https://news.ycombinator.com/item?id=49112229</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=49112229</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49112229</guid></item><item><title><![CDATA[New comment by hwillis in "Gemini Robotics 2 brings whole body intelligence to robots"]]></title><description><![CDATA[
<p>The time between gpt 2 and 3 was 15 months.  The time between gemini robotics 1 and 2 was also 15 months: <a href="https://blog.google/products-and-platforms/products/gemini/how-we-built-gemini-robotics/" rel="nofollow">https://blog.google/products-and-platforms/products/gemini/h...</a><p>The difference between gpt 2 and 3 was insane.  2 could generate limericks when it wasn't repeating a word 300x.  3 could actually do some things.  By comparison gemini robotics has hardly changed at all.<p>I will also point out that slow, non-fluid robotics is on a <i>totally</i> different level of difficulty from fast fluid motion.  Asimov could walk pretty smoothly, but it didn't fall over because it used a very careful sequence that was never unbalanced; you could pause at any point without falling over.  Move faster, like boston dynamics, and you need to account for the change in balance from your arms swinging... or rather, you need to be able to account for the rotational inertia etc from moving multiple masses along complex paths with multiple points of articulation at hundreds or thousands of times per second.<p>An algorithm to fold tshirts 90% of the time is easy.  The cloth hangs down by gravity and you can just look for right angles (corners), find their coordinates with binocular matching, and move them to meet each other.  Getting 99%, or folding them quickly, so that the fabric is actually moving instead of just hanging still- incredibly, incredibly more complex.</p>
]]></description><pubDate>Thu, 30 Jul 2026 16:10:41 +0000</pubDate><link>https://news.ycombinator.com/item?id=49112035</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=49112035</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49112035</guid></item><item><title><![CDATA[New comment by hwillis in "The Supreme Court Just Lit a Fuse Under Flock's License Plate Camera Empire"]]></title><description><![CDATA[
<p>Scale obviously does not make this more okay; watching many intersections or cell towers is obviously less reasonable than a single intersection or tower.<p>> In comparison: license plates, when in public, are always visible, and very easy to discern from one-another (different state-unique numbers); so in my mind the expectation of privacy is far lower.<p>Legally, overhearing a conversation is not different.  If you are loudly talking about your drug deals in public in front of an officer, they can use that as evidence.  A police department could hire officers to stand everywhere in public and listen to every conversation nearby.<p>Or, more specifically, they could stand conspicuously close to every payphone and listen.  The phones are in public; the officers don't need to be uniformed.  Practically speaking this is not at all different from wiretapping.  That's what the police did in <i>Katz</i>- wiretap a public payphone.<p>Flock cameras are not in any meaningful sense different from having officers follow around everyone and record everywhere they go.  Its irrelevant whether one officer is following one person or if many people are following them, each within their own small area.  That would absolutely not be legal without a warrant.  The only difference is a private company is doing it and <i>selling</i> it to the police, something that should clearly not be legal.</p>
]]></description><pubDate>Mon, 06 Jul 2026 19:57:16 +0000</pubDate><link>https://news.ycombinator.com/item?id=48809700</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=48809700</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48809700</guid></item><item><title><![CDATA[New comment by hwillis in "Tokenmaxxing is dead, long live tokenmaxxing"]]></title><description><![CDATA[
<p>"some caching gains" is a pretty huge understatement- snipping something out of the middle of the window requires rebuilding the entire context.  Thats a shitload of tokens.<p>Afaik messing with the context also pretty reliably degrades performance still.  The model responses reference things that no longer exist to it and it becomes more chaotic.<p>The real usefulness of parallel or sub-agents is not that they run at the same time, its that they isolate noisy or self-contained context away from the main window.</p>
]]></description><pubDate>Mon, 29 Jun 2026 12:51:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=48718620</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=48718620</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48718620</guid></item><item><title><![CDATA[New comment by hwillis in "Half-Life 2 in a Browser"]]></title><description><![CDATA[
<p>browsers aren't common either. <i>Standards, formats, and interfaces</i> are, which is exactly what WASM is and what this demonstrates. Native apps don't need a common operating system or even a common core like nix. They just need to support a common interface, like browsers do.</p>
]]></description><pubDate>Thu, 25 Jun 2026 12:53:26 +0000</pubDate><link>https://news.ycombinator.com/item?id=48672617</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=48672617</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48672617</guid></item><item><title><![CDATA[New comment by hwillis in "Half-Life 2 in a Browser"]]></title><description><![CDATA[
<p>for me the eyes are also showing the unwrapped texture of character's own heads, which is extremely unnerving lol</p>
]]></description><pubDate>Thu, 25 Jun 2026 12:49:51 +0000</pubDate><link>https://news.ycombinator.com/item?id=48672574</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=48672574</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48672574</guid></item><item><title><![CDATA[New comment by hwillis in "ChatGPT Health fails to recognise medical emergencies – study"]]></title><description><![CDATA[
<p>Totally missing my point.<p>Say you have bladder pain and chatgpt tells you that is a common indicator of appendicitis.  If you go to the doctor and tell them you think you have appendicitis, they will think you are saying your appendix hurts and look for causes of pain in that region.  They will not look for bladder-related pain, because <i>you did not tell them what hurts</i>.<p>Extrapolate that to all the possibilities for all conditions- something that the system is not equipped for.  Doctors do not know that bladder pain is a possible indicator of appendicitis because of experience or logic; they know because it is part of their education because the <i>system</i> has learned that over time.  The system does not account for people filtering their symptoms through chatgpt.<p>Further, it's <i>still bad</i>.  It <i>still</i> increases the permutations the doctor is required to consider for no reason.  Doctors make mistakes- they make mistakes often.  Knowing a bit of medicine can be very helpful for patients.  Weaponizing them with a predictive text machine is <i>not</i> the same thing.</p>
]]></description><pubDate>Thu, 05 Mar 2026 14:00:57 +0000</pubDate><link>https://news.ycombinator.com/item?id=47261634</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=47261634</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47261634</guid></item><item><title><![CDATA[New comment by hwillis in "ChatGPT Health fails to recognise medical emergencies – study"]]></title><description><![CDATA[
<p>We have standards of care for a reason.  They are the most basic requirements of testing.  Ignoring them is not just being a bad doctor, its unethical treatment.  Its the absolute bare minimum of a medical system.</p>
]]></description><pubDate>Fri, 27 Feb 2026 16:41:07 +0000</pubDate><link>https://news.ycombinator.com/item?id=47182570</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=47182570</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47182570</guid></item><item><title><![CDATA[New comment by hwillis in "ChatGPT Health fails to recognise medical emergencies – study"]]></title><description><![CDATA[
<p>> I do feel I actually biased the first doctors opinion with my "research."<p>It may feel easy to say doctors should just consider all the options.  But telling them an option is <i>worse</i> than just biasing their thinking; they are going to interpret that as information about your symptoms.<p>If you feel pain in your abdomen but are only talking about your appendix, they are rightfully going to think the pain is in the region of your appendix.  They are not going to treat you like you have kidney pain.  How could they?  If they have to treat all of your descriptions as all the things that you could be relating them to, then that information is practically useless.</p>
]]></description><pubDate>Fri, 27 Feb 2026 16:37:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=47182535</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=47182535</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47182535</guid></item><item><title><![CDATA[New comment by hwillis in "Tesla 'Robotaxi' adds 5 more crashes in Austin in a month – 4x worse than humans"]]></title><description><![CDATA[
<p>not to mention turning off FSD milliseconds before impact</p>
]]></description><pubDate>Tue, 17 Feb 2026 22:17:30 +0000</pubDate><link>https://news.ycombinator.com/item?id=47054210</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=47054210</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47054210</guid></item><item><title><![CDATA[New comment by hwillis in "Why is the sky blue?"]]></title><description><![CDATA[
<p>> An earth-like planet orbiting a different star would likely have evolved photoreceptor arrangements which match that star instead.<p>No, not really- the limitation is chemical, not evolutionarily-driven.  Earth is very well lit in infrared, but it's very difficult to make a chemical that is biologically useful for seeing infrared because the wavelengths are just too long.  Its very challenging to do more than the most primitive kinds of sensing in infrared.  If our sun was much dimmer, we would probably be blind, but if not our eyes would still not see in far infrared.  Same goes for ultraviolet- the energy is too high and molecular bonds are too weak.  Seeing in visible light is a reversible reaction, but ultraviolet wouldn't be.<p>What you're saying is true of ocean animals, especially in the deep sea.  They don't see red very well or at all, but the evolutionary pressure against seeing red is not terribly high except very deep where food is very limited.<p>There also <i>is</i> evolutionary pressure on our vision, but it has nothing to do with the sun.  We're twice as sensitive to green since it is so common and important, but green comes from photosynthesis and not from the color of the sun.  In a way, we are most sensitive to the <i>least</i> important color of light- the color that is <i>not</i> absorbed by plants.  The wasted, useless byproduct of sunlight is what lets us identify food.<p>Plus, we actually basically only see in blue and green.  The overlap between rods and red/green cones is huge.  "red" and "green" as we perceive them are mostly fabrications of our neural circuits- if we were seeing them how our photoreceptors actually receive light, all shades of green/red would be very strongly mixed together.  All shades of red would look significantly green except for the very farthest reds, which would look very dark because of low sensitivity.</p>
]]></description><pubDate>Tue, 10 Feb 2026 17:04:57 +0000</pubDate><link>https://news.ycombinator.com/item?id=46963006</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=46963006</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46963006</guid></item><item><title><![CDATA[New comment by hwillis in "Luce: First Electric Ferrari"]]></title><description><![CDATA[
<p>> From what I've heard from auto engineers I know, using the battery as part of the structure is not really done. Transfering mechanical stresses to the battery is something you just do not do.<p>This is technically true, but structural batteries are not the same as stressed engines like on a motorcycle.  In the latter, the engine fully replaces a frame member with essentially just the engine block.  With structural batteries the cells themselves are not taking on any stress (they <i>could</i>, but yeah its not a very safe idea) but the outside containment is stil doing double duty.  Its a pretty minor weight savings because the battery case does not need to be as strong as the frame does, but its not fair to say that structural batteries are not done.  Even when they are just bolting on to a subframe, they're still usually doing things for frame stiffness.</p>
]]></description><pubDate>Tue, 10 Feb 2026 14:20:11 +0000</pubDate><link>https://news.ycombinator.com/item?id=46960031</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=46960031</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46960031</guid></item><item><title><![CDATA[New comment by hwillis in "Luce: First Electric Ferrari"]]></title><description><![CDATA[
<p>Molicel's P60 (INR-21700-P60C) weighs 75 grams and can produce almost a horsepower.  A 500 horsepower battery weighs less than 42 kg.  It stores 12 kWh.<p>Batteries are not heavy, <i>range</i> is heavy.  Range is the sacrifice and sports cars don't need range.<p>> See how they brag about a simpler new steering wheel that is 400g lighter?<p>As if ferrari -as if all sportscar manufacturers- have not done the same always.  Replacing door handles with straps is not new.</p>
]]></description><pubDate>Tue, 10 Feb 2026 14:12:53 +0000</pubDate><link>https://news.ycombinator.com/item?id=46959955</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=46959955</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46959955</guid></item><item><title><![CDATA[New comment by hwillis in "xAI joins SpaceX"]]></title><description><![CDATA[
<p>The earth is actually a pretty big heat <i>source</i> in space.  Solar radiation is a point source, so you can orient parallel to the rays and avoid it.  The earth takes up about half the sky and is unavoidable.  The earth also radiates infrared, the same as your radiators, so you can't reflect it.  Solar light is in the visible spectrum so you can paint your radiators to be reflective in visible wavelengths but emissive in infrared.<p>Low satellites are still cooler in the Earth's shadow than they would be in unshadowed orbits, but higher orbits are cooler than either.  Not where you'd want to put millions of datacenters though.</p>
]]></description><pubDate>Tue, 03 Feb 2026 13:41:17 +0000</pubDate><link>https://news.ycombinator.com/item?id=46870845</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=46870845</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46870845</guid></item><item><title><![CDATA[New comment by hwillis in "xAI joins SpaceX"]]></title><description><![CDATA[
<p>> They don't send repair people into space.<p>There were five separate flights to service the Hubble telescope.  It was designed from the beginning to be repaired and upgraded.<p><a href="https://en.wikipedia.org/wiki/STS-125" rel="nofollow">https://en.wikipedia.org/wiki/STS-125</a></p>
]]></description><pubDate>Tue, 03 Feb 2026 13:26:06 +0000</pubDate><link>https://news.ycombinator.com/item?id=46870684</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=46870684</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46870684</guid></item><item><title><![CDATA[New comment by hwillis in "FAA institutes nationwide drone no-fly zones around ICE operations"]]></title><description><![CDATA[
<p>The people of Minneapolis are defending their right to accept foreigners into their community.  Do you genuinely think those people are being paid?  That all those protestors don't genuinely feel that way?  That the majority in that state don't, as the polls say, want those people there?<p>If you really think that people in Texas and Florida have the right to say who gets to live in <i>Minnesota</i>, why?</p>
]]></description><pubDate>Sun, 25 Jan 2026 18:09:01 +0000</pubDate><link>https://news.ycombinator.com/item?id=46756456</link><dc:creator>hwillis</dc:creator><comments>https://news.ycombinator.com/item?id=46756456</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46756456</guid></item></channel></rss>