<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: owenmarshall</title><link>https://news.ycombinator.com/user?id=owenmarshall</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Tue, 14 Apr 2026 21:40:26 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=owenmarshall" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by owenmarshall in "Missile defense is NP-complete"]]></title><description><![CDATA[
<p>> The US had APKWS (anti-drone guided missiles) operational in the 2010s and these have been widely deployed<p>... on 4th/5th gen fighters that cost tens of thousands per flight hour[0] based on current evidence of deployment.  We're still killing mosquitoes with hand grenades.<p>Iron Beam/the US systems are certainly interesting, but haven't been scaled up to meaningful deployments yet.<p>Meanwhile, those "considerably less sophisticated" systems were fielded in exercises by the Ukranians against NATO doctrine and won handily[1].<p>[0] <a href="https://www.defenseone.com/defense-systems/2026/03/fighter-jets-are-downing-iranian-drones-dangerous-expensive-mission/412097/" rel="nofollow">https://www.defenseone.com/defense-systems/2026/03/fighter-j...</a><p>[1] <a href="https://www.wsj.com/opinion/nato-has-seen-the-future-and-is-unprepared-887eaf0f" rel="nofollow">https://www.wsj.com/opinion/nato-has-seen-the-future-and-is-...</a></p>
]]></description><pubDate>Tue, 24 Mar 2026 16:10:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=47504860</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=47504860</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47504860</guid></item><item><title><![CDATA[New comment by owenmarshall in "Missile defense is NP-complete"]]></title><description><![CDATA[
<p>This leans towards my belief that the US is fundamentally fighting last century's war against adversaries that have _massively_ evolved.<p>Look at the Ukranians: they are currently fielding an entire suite of counter-drone tech: fast pursuit systems to hit Russian drones on launch, cheap FPV drones for last-mile intercept, integrated radar/acoustic monitoring to target and respond to launches... and of course, the Russians are responding with IR floodlights and air to air launchers on their drones, or even just launching a bunch of cheap foam decoy Gerbera's in the middle of their Shahed's to soak up intercepts.  Meanwhile, the front lines are basically static -- any infantry from either side that tries to go into the kill box gets picked off by loitering drones.<p>And the best the US can field today is "$1mm per Patriot" or "cover a tiny area with Land Phalanx (which also costs something like $4k/second burst)".</p>
]]></description><pubDate>Tue, 24 Mar 2026 14:56:52 +0000</pubDate><link>https://news.ycombinator.com/item?id=47503583</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=47503583</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47503583</guid></item><item><title><![CDATA[New comment by owenmarshall in "Missile defense is NP-complete"]]></title><description><![CDATA[
<p>Your first option comes with the major caveat that each interceptor you fire comes from a limited stockpile whose replacement rate[0] today isn't sufficient for even going 1:1, let alone accepting that multiple interceptors are required.<p>I'd say the real options in the near term when faced with an inbound missile is a) deciding to deplete your stockpile of interceptors with an incredibly limited replenishment rate; or b) risking a hit to a lower-value target.<p>Could the US go to a war economy footing and scale production?  _Maybe_?  I'm not entirely convinced the US can stomach the costs.<p>[0]: again, numbers are hard to find, but <a href="https://www.lockheedmartin.com/en-us/news/features/2026/Lockheed-Martin-and-the-U-S-Department-of-War-Expand-THAAD-Interceptor-Production.html" rel="nofollow">https://www.lockheedmartin.com/en-us/news/features/2026/Lock...</a> gives a flavor of just what defenders are up against.</p>
]]></description><pubDate>Tue, 24 Mar 2026 14:29:01 +0000</pubDate><link>https://news.ycombinator.com/item?id=47503128</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=47503128</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47503128</guid></item><item><title><![CDATA[New comment by owenmarshall in "Missile defense is NP-complete"]]></title><description><![CDATA[
<p>Two more sobering axes to introduce: cost and manufacturing capability.<p>Numbers are hard to find for obvious security reasons, but using the numbers most optimistic to the defender[0] suggests an adversary using a Fatah type hypersonic is spending 1/3rd the cost of an Arrow interceptor, and is launching missiles that are produced at a much faster rate.  Interception is deeply asymmetric in favor of the attacker.<p>[0] <a href="https://www.jpost.com/israel-news/defense-news/article-823148" rel="nofollow">https://www.jpost.com/israel-news/defense-news/article-82314...</a></p>
]]></description><pubDate>Tue, 24 Mar 2026 13:39:29 +0000</pubDate><link>https://news.ycombinator.com/item?id=47502437</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=47502437</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47502437</guid></item><item><title><![CDATA[New comment by owenmarshall in "Tech hobbyist makes shoulder-mounted guided missile prototype with $96 in parts"]]></title><description><![CDATA[
<p>A friend of mine interested in model rocketry demoed a sun tracking model rocket at a state convention.  Pretty soon after, he had a chat he described as "terrifying but friendly" with "a few dudes in windbreakers" who wanted to know what he was up to.  He didn't get into any trouble but decided he'd stick to unguided rockets from then on.<p>Between that and playing spot the fed at the local machine gun shoot, I was surprised at just how much attention the state pays to these kind of hobby conventions, but I guess I shouldn't be.</p>
]]></description><pubDate>Wed, 18 Mar 2026 16:32:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=47427851</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=47427851</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47427851</guid></item><item><title><![CDATA[New comment by owenmarshall in "A terminal weather app with ASCII animations driven by real-time weather data"]]></title><description><![CDATA[
<p>I also enjoy `finger <cityname>@graph.no`</p>
]]></description><pubDate>Thu, 19 Feb 2026 19:25:15 +0000</pubDate><link>https://news.ycombinator.com/item?id=47077957</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=47077957</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47077957</guid></item><item><title><![CDATA[New comment by owenmarshall in "Show HN: New search engine and free-FOIA-by-fax-via-web for US veteran records"]]></title><description><![CDATA[
<p>> 3) I appreciate the warning on the terms and conditions about seeing things you might not want to see.<p>I'd echo this.  I found that to be exceptionally well-written and helped me understand the records I'd receive were unlikely to be the records I was interested in, so I cancelled at that point.<p>Your abandon rate at that step could make for interesting reading!</p>
]]></description><pubDate>Mon, 13 Jan 2025 14:43:20 +0000</pubDate><link>https://news.ycombinator.com/item?id=42683896</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=42683896</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42683896</guid></item><item><title><![CDATA[New comment by owenmarshall in "'I grew up with it': readers on the enduring appeal of Microsoft Excel"]]></title><description><![CDATA[
<p>Sending a check via mail is infrequently done, but it happens. I just paid my annual property taxes that way. My options were:<p>* mailing a check<p>* paying via credit card over the phone for a hefty surcharge<p>* cash in person<p>In my case, I used my online banking to send the amount to the mailing address on the bill. In some cases - for large companies, typically - my bank can send the remittance electronically. In others, though, they fill out a paper check on my behalf and send it via the postal system. This service is fee free to me, or else I’d have sent the letter myself.</p>
]]></description><pubDate>Sat, 02 Nov 2024 21:04:30 +0000</pubDate><link>https://news.ycombinator.com/item?id=42029224</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=42029224</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42029224</guid></item><item><title><![CDATA[New comment by owenmarshall in "'I grew up with it': readers on the enduring appeal of Microsoft Excel"]]></title><description><![CDATA[
<p>“Balancing a checking account” in American vernacular is typically used to mean reconciling the transactions your bank has posted to the spend you’ve tracked.<p>This used to be more important when you wrote paper checks and received a monthly paper statement from your bank. Most people who “balance” their accounts today seem primarily concerned that they are adhering to their personal budget. But the term remains.</p>
]]></description><pubDate>Sat, 02 Nov 2024 20:19:16 +0000</pubDate><link>https://news.ycombinator.com/item?id=42028969</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=42028969</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42028969</guid></item><item><title><![CDATA[New comment by owenmarshall in "How Israel’s bulky pager fooled Hezbollah"]]></title><description><![CDATA[
<p>Of important note, none of that requires any modification to the pager. Paging protocols are ancient and unencrypted: a little SDR stick and you can run your own sigint on your local pager network.</p>
]]></description><pubDate>Wed, 16 Oct 2024 12:47:12 +0000</pubDate><link>https://news.ycombinator.com/item?id=41858444</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=41858444</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41858444</guid></item><item><title><![CDATA[New comment by owenmarshall in "How Israel’s bulky pager fooled Hezbollah"]]></title><description><![CDATA[
<p>Airlines are already banning pagers and walkie talkies.<p>I wonder how many duds are currently being processed by Hezbollah right now.<p>(0): <a href="https://www.nytimes.com/2024/10/07/world/middleeast/emirates-bans-pagers-and-walkie-talkies-on-flights-after-attacks.html" rel="nofollow">https://www.nytimes.com/2024/10/07/world/middleeast/emirates...</a></p>
]]></description><pubDate>Wed, 16 Oct 2024 12:32:09 +0000</pubDate><link>https://news.ycombinator.com/item?id=41858332</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=41858332</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41858332</guid></item><item><title><![CDATA[New comment by owenmarshall in "How Israel’s bulky pager fooled Hezbollah"]]></title><description><![CDATA[
<p>Technically speaking that would be much harder: pagers don’t have microphones, and most don’t transmit - and those that do send very small messages.<p>You’d have to add significant  new capabilities to pull off surveillance, which would increase the risk of detection.</p>
]]></description><pubDate>Wed, 16 Oct 2024 12:27:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=41858293</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=41858293</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41858293</guid></item><item><title><![CDATA[New comment by owenmarshall in "Sextortion scams now include photos of your home"]]></title><description><![CDATA[
<p>See the classic Cormac Herley research: “Why do Nigerian scammers say they’re from Nigeria?”<p><a href="https://www.microsoft.com/en-us/research/publication/why-do-nigerian-scammers-say-they-are-from-nigeria/" rel="nofollow">https://www.microsoft.com/en-us/research/publication/why-do-...</a><p>> Far-fetched tales of West African riches strike most as comical. Our analysis suggests that is an advantage to the attacker, not a disadvantage. Since his attack has a low density of victims the Nigerian scammer has an over-riding need to reduce false positives. By sending an email that repels all but the most gullible the scammer gets the most promising marks to self-select, and tilts the true to false positive ratio in his favor.</p>
]]></description><pubDate>Tue, 03 Sep 2024 17:16:28 +0000</pubDate><link>https://news.ycombinator.com/item?id=41437018</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=41437018</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41437018</guid></item><item><title><![CDATA[New comment by owenmarshall in "Blitzortung – real time lightning strikes around the world"]]></title><description><![CDATA[
<p>I’ve had a Blitzortung Blue sitting in a box just waiting to be soldered up - maybe this post kicks me into finally believing in my soldering iron skills and doing it.</p>
]]></description><pubDate>Tue, 27 Aug 2024 23:49:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=41374531</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=41374531</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41374531</guid></item><item><title><![CDATA[New comment by owenmarshall in "Designing my own watch (2020)"]]></title><description><![CDATA[
<p>Agreed entirely. My grandfather’s 5513 desk diver was passed down to me. It had scuffs and scratches and the lume had long since stopped glowing and turned to a mustard color.<p>And while I never planned to have any of that changed because I thought it added to the cool factor, the appraisal guaranteed that decision. I was recommended a local watchmaker who could service the movement only and ensure the seals were all intact. Or I could send it back to Rolex for servicing where they’d polish the case, relume the numbers, and swap the acrylic dome for sapphire - and by doing so chop ~50% off the value of the watch.<p>It turns out collectors love patinas and scratches and for a 60 year old watch to look its age.</p>
]]></description><pubDate>Thu, 22 Aug 2024 13:14:00 +0000</pubDate><link>https://news.ycombinator.com/item?id=41319890</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=41319890</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41319890</guid></item><item><title><![CDATA[New comment by owenmarshall in "Mpox: Sweden confirms first case of 'more grave' variant outside Africa"]]></title><description><![CDATA[
<p>One important note with mpox is that there are two distinct lineages of the virus at play: the outbreak in the US in 2022 was clade IIb, which seems to be difficult to spread - hence the “close physical contact” attribution. It also had a low observed CFR.<p>Clade I mpox is the current outbreak under discussion. It spreads far easier - most pathways are likely not sexual contact - and has an observed CFR 10x higher than IIb.<p>In other words: this is a very different virus than what we saw in 2022.<p><a href="https://centerforhealthsecurity.org/sites/default/files/2024-06/20240610-mpoxsituationreport.pdf" rel="nofollow">https://centerforhealthsecurity.org/sites/default/files/2024...</a></p>
]]></description><pubDate>Fri, 16 Aug 2024 12:02:27 +0000</pubDate><link>https://news.ycombinator.com/item?id=41265553</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=41265553</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41265553</guid></item><item><title><![CDATA[New comment by owenmarshall in "How do jewellers capture every last particle of gold dust? (2017)"]]></title><description><![CDATA[
<p>Anyone offering a discount of over 2500 basis points to participate in what might be one of the most accessible markets across the world isn’t offering actual value, they’ve just found a good mark.</p>
]]></description><pubDate>Tue, 16 Jul 2024 03:28:24 +0000</pubDate><link>https://news.ycombinator.com/item?id=40973471</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=40973471</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=40973471</guid></item><item><title><![CDATA[New comment by owenmarshall in "Leaked OpenAI documents reveal aggressive tactics toward former employees"]]></title><description><![CDATA[
<p><i>Probably</i> not enforceable != enforceable. Are you worth suing or does everyone sign? Are your state laws and jurisprudence going to back you up?<p>If you are ever going to sign an employee agreement that binds you, consult with an employment attorney first. I did this with a past noncompete and it was the best few hundred I ever spent: my attorney talked with me for an hour about the particulars of my noncompete, pointed out areas to negotiate, and sent back redlines to make the contract more equitable.</p>
]]></description><pubDate>Wed, 22 May 2024 23:56:16 +0000</pubDate><link>https://news.ycombinator.com/item?id=40448488</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=40448488</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=40448488</guid></item><item><title><![CDATA[New comment by owenmarshall in "Try Clojure"]]></title><description><![CDATA[
<p>And if you <i>do</i> need to touch Java for reasons Clojure doesn’t impose, the interoperability story is really good.<p>I’ve done this with internal libraries - it’s easy to get them pulled into a Clojure code base, wrap them in such a way that the ergonomics of the rest of your code aren’t ruined, and still treat them as a first class citizen for stuff like your build system, artifact stores, etc.</p>
]]></description><pubDate>Wed, 22 May 2024 21:42:52 +0000</pubDate><link>https://news.ycombinator.com/item?id=40446998</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=40446998</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=40446998</guid></item><item><title><![CDATA[New comment by owenmarshall in "The Grateful Dead's Wall of Sound (2019)"]]></title><description><![CDATA[
<p>90 minutes? At a _Dead_ concert?!<p>That’s enough to cover a typical Playing>Uncle John’s>Drums>Space, and probably not get all the way through the reprises. You’ve easily got another two hours of jam.</p>
]]></description><pubDate>Tue, 07 May 2024 22:57:58 +0000</pubDate><link>https://news.ycombinator.com/item?id=40292498</link><dc:creator>owenmarshall</dc:creator><comments>https://news.ycombinator.com/item?id=40292498</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=40292498</guid></item></channel></rss>