<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: schiffern</title><link>https://news.ycombinator.com/user?id=schiffern</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Tue, 18 Aug 2026 10:41:03 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=schiffern" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by schiffern in "AI Just Created Viruses Not Found in Nature"]]></title><description><![CDATA[
<p>Take your pick, neither sounds great:<p>1 angry person with $800 in CRISPR and AI<p>1 angry person with $800 in pangolin cages and time<p>1 company with a billion chickens and a drive to cut biosafety costs</p>
]]></description><pubDate>Thu, 06 Aug 2026 19:06:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=49200919</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49200919</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49200919</guid></item><item><title><![CDATA[New comment by schiffern in "Discovery of a multicomponent alloy forged by the Hiroshima atomic blast"]]></title><description><![CDATA[
<p><p><pre><code>  >The U.S. did one test shot
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I'm seeing 11 shots total,[0] though Wikipedia lists even more.<p>"Nine were for the purpose of developing an ultra-low fission thermonuclear explosive for use in nuclear excavation projects and one each was for the development of special emplacement techniques and for a small diameter, ultra-low tritium producing explosive for hydrocarbon applications such as Rio Blanco."<p>[0]  Table 1 on page 7 (PDF page 11) <a href="https://www.osti.gov/servlets/purl/408695" rel="nofollow">https://www.osti.gov/servlets/purl/408695</a></p>
]]></description><pubDate>Thu, 06 Aug 2026 18:42:33 +0000</pubDate><link>https://news.ycombinator.com/item?id=49200622</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49200622</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49200622</guid></item><item><title><![CDATA[New comment by schiffern in "Buckminster Fuller: everything I know"]]></title><description><![CDATA[
<p>It's still a big waste of <i>compute power</i>. Most of the lifecycle emissions come from manufacturing, not electricity.</p>
]]></description><pubDate>Tue, 04 Aug 2026 15:54:05 +0000</pubDate><link>https://news.ycombinator.com/item?id=49170671</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49170671</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49170671</guid></item><item><title><![CDATA[New comment by schiffern in "There Will Come Soft Rains (1950) [pdf]"]]></title><description><![CDATA[
<p><p><pre><code>  >It seems quaint now,
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It goes up and down. Some days I wish it seemed more quaint.</p>
]]></description><pubDate>Tue, 04 Aug 2026 15:42:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=49170541</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49170541</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49170541</guid></item><item><title><![CDATA[New comment by schiffern in "Rear center fuel tank adds roughly 20k liters and extends range by 1k NM"]]></title><description><![CDATA[
<p>For <i>cars</i> not planes, but apparently you're an LLM so....</p>
]]></description><pubDate>Sat, 01 Aug 2026 19:07:59 +0000</pubDate><link>https://news.ycombinator.com/item?id=49137398</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49137398</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49137398</guid></item><item><title><![CDATA[New comment by schiffern in "Rear center fuel tank adds roughly 20k liters and extends range by 1k NM"]]></title><description><![CDATA[
<p>Not just cost, but that limited airport "slot" represents (a slice of the) significant carbon emissions from building/operating the airport.<p>So even if you <i>only</i> care about carbon emissions, it can still make sense to skip the stop even if it causes slightly more total fuel burn.</p>
]]></description><pubDate>Sat, 01 Aug 2026 18:57:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=49137295</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49137295</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49137295</guid></item><item><title><![CDATA[New comment by schiffern in "Rear center fuel tank adds roughly 20k liters and extends range by 1k NM"]]></title><description><![CDATA[
<p><p><pre><code>  >In my dreams, my ultra-advanced car would open the windows when braking to get two benefits in one.
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Or use those triangular vent windows / wing windows, as seen on old trucks and classic cars.<p><a href="https://www.fastlanecars.com/blog/wing-windows-history-and-classic-car-design" rel="nofollow">https://www.fastlanecars.com/blog/wing-windows-history-and-c...</a><p><a href="https://www.ccjdigital.com/trucks/article/15749837/the-story-of-truck-wing-windows-the-end-of-the-traditional-truck" rel="nofollow">https://www.ccjdigital.com/trucks/article/15749837/the-story...</a><p>You could quickly flip it open with a servo when braking, controlled by a
differential thermostat so it only pulls in air when the outside isn't too much hotter than inside. I think you actually want a <i>negative</i> thermostat offset, because even if it's a couple degrees warmer you still get moving air.<p>Compared to rolling down the window you don't get the loud buffeting sound, it acts as a really good aero-brake, and it pulls in huge amounts of air. There's the downside that it will preferentially pull in air around intersections, where traffic pollution tends to peak due to braking and accelerating (EVs help but there's still brake and tire dust).<p>Love this honestly. It has definite "shitty project" potential...</p>
]]></description><pubDate>Sat, 01 Aug 2026 18:44:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=49137159</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49137159</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49137159</guid></item><item><title><![CDATA[New comment by schiffern in "Airbus A350 jet flies 24 hours nonstop from Australia to France"]]></title><description><![CDATA[
<p>That's the regular A350-1000. This is the A350-1000ULR, which has an additional 20,600 L rear tank.<p><a href="https://www.airbus.com/en/newsroom/stories/2026-07-extending-the-horizon-inside-the-a350-1000ulrs-longest-development-flight" rel="nofollow">https://www.airbus.com/en/newsroom/stories/2026-07-extending...</a></p>
]]></description><pubDate>Tue, 28 Jul 2026 19:23:27 +0000</pubDate><link>https://news.ycombinator.com/item?id=49088678</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=49088678</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=49088678</guid></item><item><title><![CDATA[New comment by schiffern in "What Do We Know About the Microplastics Inside Us?"]]></title><description><![CDATA[
<p>I expect many researchers are using fresh lab-made microplastics, which are indeed mostly harmless. However part of the problem is that real-world plastics are chemical sponges that absorb toxins (heavy metals, PCBs, etc) from the environment and deliver them in a concentrated dose into the body.<p><a href="https://www.eurekalert.org/news-releases/923529" rel="nofollow">https://www.eurekalert.org/news-releases/923529</a></p>
]]></description><pubDate>Wed, 08 Jul 2026 19:43:53 +0000</pubDate><link>https://news.ycombinator.com/item?id=48836541</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=48836541</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48836541</guid></item><item><title><![CDATA[New comment by schiffern in "Study: ultra-black coating could reduce satellite light pollution"]]></title><description><![CDATA[
<p>Correct.  This is why SpaceX rejected using black coatings alone for Starlink. Mirrored surfaces that they tested instead were <i>darker</i> than VANTA black.[0]<p>On some surfaces they use a SpaceX-designed coating called Low Reflectivity Black, which is the least specular space-rated paint by a factor of 5.[1]<p>[0] <a href="https://www.youtube.com/watch?v=MNc5yCYth5E#t=2430s" rel="nofollow">https://www.youtube.com/watch?v=MNc5yCYth5E#t=2430s</a><p>[1] <a href="https://starlink.com/public-files/BrightnessMitigationBestPracticesSatelliteOperators.pdf" rel="nofollow">https://starlink.com/public-files/BrightnessMitigationBestPr...</a></p>
]]></description><pubDate>Mon, 06 Jul 2026 15:43:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=48806265</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=48806265</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48806265</guid></item><item><title><![CDATA[New comment by schiffern in "The bottleneck might be the air in the room"]]></title><description><![CDATA[
<p>CO2 on the ISS routinely gets up to 5 mmHg = 6,500 ppm, because the CO2 scrubber is more effective at that concentration. According to NASA it's "not practical from  a hardware standpoint" to set the operational CO2 limit at 4,000 ppm.<p><a href="https://ntrs.nasa.gov/api/citations/20100039645/downloads/20100039645.pdf" rel="nofollow">https://ntrs.nasa.gov/api/citations/20100039645/downloads/20...</a></p>
]]></description><pubDate>Sat, 04 Jul 2026 22:59:06 +0000</pubDate><link>https://news.ycombinator.com/item?id=48789845</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=48789845</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48789845</guid></item><item><title><![CDATA[New comment by schiffern in "The Radiation Exposure Lie"]]></title><description><![CDATA[
<p>Skeptical? I was too.<p>Check out the interview with Dr Bernie Cohen, who did a lot of the early epidemiological work. The interviewer is rather woo, but the professor is as hard-nose a scientist as you could hope for. It makes a good  pair because it let him correct misconceptions.<p>Long story short, Dr Cohen became unpopular after his data showed home radon levels to be <i>negatively</i> correlated with lung cancer risk. The more radon, the lower your risk of lung cancer.<p>Part 1: <a href="https://www.youtube.com/watch?v=xhkBLhw-8pk" rel="nofollow">https://www.youtube.com/watch?v=xhkBLhw-8pk</a><p>Part 2: <a href="https://www.youtube.com/watch?v=SuUFiUoynPo" rel="nofollow">https://www.youtube.com/watch?v=SuUFiUoynPo</a></p>
]]></description><pubDate>Mon, 29 Jun 2026 19:44:23 +0000</pubDate><link>https://news.ycombinator.com/item?id=48724156</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=48724156</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48724156</guid></item><item><title><![CDATA[New comment by schiffern in "Astronauts told to return to ISS after sheltering over air leak repairs"]]></title><description><![CDATA[
<p>Yes. It was the urine processor that had problems with excess calcium, not the air scrubber.<p><a href="https://ttu-ir.tdl.org/server/api/core/bitstreams/f8ca865b-1d15-4689-841b-60d57d119016/content" rel="nofollow">https://ttu-ir.tdl.org/server/api/core/bitstreams/f8ca865b-1...</a></p>
]]></description><pubDate>Fri, 05 Jun 2026 20:32:27 +0000</pubDate><link>https://news.ycombinator.com/item?id=48417814</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=48417814</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48417814</guid></item><item><title><![CDATA[New comment by schiffern in "Airline worker arrested after sharing photos of bomb damage in WhatsApp group"]]></title><description><![CDATA[
<p>Mostly your post is just about the side-issue of whether (in 20/20 hindsight) the censorship in the USA was justified. However this ignores the fundamental double-standard toward the USA vs the UAE. In 20/20 hindsight the UAE censorship may turn out to be justified, or not, however <i>we don't know yet.</i><p><pre><code>  > And to the extent that the censorship was justified, yes, at the very least we were legally in a properly declared war.
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Didn't I (preemptively) respond to this already?<p>"You might say it's different since we were at war, but this ignores how the threat model and immediacy is very different in the UAE vs here in the (geographically well protected/isolated) US."<p>In the UAE these laws are (equally) "proper" and "legal," so I don't see how the presence or absence of a  formal declaration of war makes any difference here, or meaningfully responds to my point above.</p>
]]></description><pubDate>Sun, 19 Apr 2026 22:09:30 +0000</pubDate><link>https://news.ycombinator.com/item?id=47828092</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=47828092</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47828092</guid></item><item><title><![CDATA[New comment by schiffern in "Airline worker arrested after sharing photos of bomb damage in WhatsApp group"]]></title><description><![CDATA[
<p><p><pre><code>  >In most of the world such photos would be deemed of public interest and shared 
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OTOH, anyone remember "loose lips sink ships?" Beyond the famous poster, it was backed up by robust censorship laws.[0][1]<p>You might say it's different since we were at war, but this ignores how the threat model and immediacy is very different in the UAE vs here in the (geographically well protected/isolated) US.<p>Battle damage assessment, especially if it's timely, is critical information in any conflict. This is especially true for modern drone-based / hybrid asymmetrical conflict.<p>[0] <a href="https://www.archives.gov/publications/prologue/2001/spring/mail-censorship-in-world-war-two-1" rel="nofollow">https://www.archives.gov/publications/prologue/2001/spring/m...</a><p>[1]<a href="https://en.wikipedia.org/wiki/Office_of_Censorship" rel="nofollow">https://en.wikipedia.org/wiki/Office_of_Censorship</a></p>
]]></description><pubDate>Sun, 19 Apr 2026 14:23:16 +0000</pubDate><link>https://news.ycombinator.com/item?id=47824526</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=47824526</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47824526</guid></item><item><title><![CDATA[New comment by schiffern in "How to breathe in fewer microplastics in your home"]]></title><description><![CDATA[
<p>Yes I just mean the more expensive tea on the shelf. On cheaper SKUs they're trying to cut cost so they use normal tea bags. The plastic sachets were a trend for a couple years but hopefully most brands have switched away.<p>That study is interesting because they used SEM to image the plastic afterward, and you can see how the plastic surface has literally been <i>torn up</i> on a microscopic level simply by touching hot water.<p>Plastic has a low-energy surface, which means it doesn't take much energy to tear it apart. Even Brownian motion is enough, which is pretty wild.</p>
]]></description><pubDate>Sat, 11 Apr 2026 14:40:18 +0000</pubDate><link>https://news.ycombinator.com/item?id=47731055</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=47731055</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47731055</guid></item><item><title><![CDATA[New comment by schiffern in "How to breathe in fewer microplastics in your home"]]></title><description><![CDATA[
<p>The kicker? It's only on high-end tea, because it's <i>more expensive</i> than regular tea bags.</p>
]]></description><pubDate>Sat, 11 Apr 2026 14:22:13 +0000</pubDate><link>https://news.ycombinator.com/item?id=47730884</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=47730884</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47730884</guid></item><item><title><![CDATA[New comment by schiffern in "How to breathe in fewer microplastics in your home"]]></title><description><![CDATA[
<p>Agreed. MERV 11-14 can be <i>far</i> more effective than HEPA.<p>If you need to filter "one and done" (like pumping air into a hospital operating room), that's where you need HEPA. Most home air purifiers mix the clean air back into the same room, so MERV is closer to the ideal sweet spot.<p>It's also important to buy <i>reputable</i> brands of MERV filter, ideally ones which have a large number of folds (surface area) like the 3M 1900 MPR. In recent testing about half of filter brands scored well below their claimed MERV rating:<p><a href="https://www.youtube.com/watch?v=FKAVek1YaSQ" rel="nofollow">https://www.youtube.com/watch?v=FKAVek1YaSQ</a></p>
]]></description><pubDate>Sat, 11 Apr 2026 14:13:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=47730801</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=47730801</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47730801</guid></item><item><title><![CDATA[New comment by schiffern in "How to breathe in fewer microplastics in your home"]]></title><description><![CDATA[
<p>That helps for pollution that comes from outside (traffic, pollen, wood smoke), but most of the microplastics are generated by moving/wearing synthetic textiles inside the home.<p>Positive pressure systems are great, love 'em, but there's a <i>quantitative</i> mismatch in this case. Above ~1 ACH your HVAC costs will go through the roof (even with heat/humidity recovery), but for effective filtration you need 6-8 ACH to catch the larger dust before your lungs do.</p>
]]></description><pubDate>Sat, 11 Apr 2026 13:46:52 +0000</pubDate><link>https://news.ycombinator.com/item?id=47730568</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=47730568</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47730568</guid></item><item><title><![CDATA[New comment by schiffern in "How to breathe in fewer microplastics in your home"]]></title><description><![CDATA[
<p>A false sense of security can be <i>worse</i> than nothing, because it prevents you from seeking out actually effective options.<p>I too would like such a "shy" air purifier, but manufacturers always seem to go the other way: when occupancy is detected they <i>increase</i> the fan speed.<p>Best option IMO is just to get an air purifier with a good CADR-to-decibel ratio and then (again) size it correctly. A surprisingly good option is something called the Airfanta 3 Pro, which is basically like those wildfire filter boxes except it uses PC fans.</p>
]]></description><pubDate>Sat, 11 Apr 2026 13:43:44 +0000</pubDate><link>https://news.ycombinator.com/item?id=47730545</link><dc:creator>schiffern</dc:creator><comments>https://news.ycombinator.com/item?id=47730545</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47730545</guid></item></channel></rss>