<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: dgroshev</title><link>https://news.ycombinator.com/user?id=dgroshev</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Sun, 12 Apr 2026 23:36:16 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=dgroshev" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by dgroshev in "Are We Idiocracy Yet?"]]></title><description><![CDATA[
<p>I'm not being dishonest, I'm being sarcastic. Although I can see that you ignored everything else that I said.<p>I couldn't care less about "winning".</p>
]]></description><pubDate>Tue, 07 Apr 2026 14:00:09 +0000</pubDate><link>https://news.ycombinator.com/item?id=47675526</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47675526</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47675526</guid></item><item><title><![CDATA[New comment by dgroshev in "Are We Idiocracy Yet?"]]></title><description><![CDATA[
<p>"I'd love to hear any additional ideas except those that work everywhere because that'd require big changes"<p>The answer is trivial and well-known: federal-level gun controls (because anything state-level is a joke without hard borders between states), coupled with a buy-back program, amnesties, and real enforcement. There are no school shootings in the UK or Australia.<p>Unfortunately, there are too many people who'd rather have more guns and more dead kids (and adults) than fewer dead kids and fewer guns around. They'd justify that by talking about "preventing tyranny" or something, ignoring that paramilitaries executing people in broad daylight on camera with no consequences is already the reality of the US <i>today</i>, and guns played zero to negative role preventing that. Coincidentally, there are no such paramilitaries in the UK or in Australia either.<p>As for "the rights of citizens": there is no such thing as an immutable unconditional right. American citizens don't have a right to own nuclear weapons, neither should they, even though it's perfectly possible to have a very expansive definition of "bearing arms". Plus, the Constitution itself was amended many times in the past, and by now is clearly in need of a major overhaul, as evidenced by the US sliding down in various democracy indices (for example, World Press Freedom Index puts the US under Romania in 2025). So there is nothing impossible or uniquely oppressive about the reforms necessary to stop children being shot in schools, but because it's such a foundational element of identity for so many with <i>a lot</i> of money behind it (the NRA is exceptionally well funded), in practice there's indeed "No Way to Prevent This".</p>
]]></description><pubDate>Tue, 07 Apr 2026 13:27:28 +0000</pubDate><link>https://news.ycombinator.com/item?id=47675073</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47675073</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47675073</guid></item><item><title><![CDATA[New comment by dgroshev in "Missile defense is NP-complete"]]></title><description><![CDATA[
<p>Again, the unfairness goes both ways: RVs need to carry substantial payloads, whereas KKVs only need DACS and sensing. THAAD KKVs weigh about 50kg; most effective payloads, even nuclear, would weigh substantially more.<p>Hypersonic gliders can't be nearly as numerous as ballistic RVs because physics, and they are getting their own interceptor (GPI).<p>I think this conversation would benefit from splitting theatre ballistic threats (evidently, those are now being effectively countered without 30 to 1 ratios) from strategic threats. For strategic threats, the logic is substantially more complex: even 50% intercept rate greatly complicates counter-force strikes and is valuable. In practice, the rate is substantially higher than 50%.<p>Chevaline wasn't the only program, the US had its own they didn't end up deploying. Both countries concluded that effective decoys end up weighing roughly the same as warheads.</p>
]]></description><pubDate>Sat, 28 Mar 2026 23:02:26 +0000</pubDate><link>https://news.ycombinator.com/item?id=47558834</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47558834</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47558834</guid></item><item><title><![CDATA[New comment by dgroshev in "Missile defense is NP-complete"]]></title><description><![CDATA[
<p>That goes both ways. Terminal manoeuvring gets difficult as speeds increase, too. Besides, higher tier threats are intercepted outside the atmosphere, where it would be prohibitively expensive (in mass and accuracy) for RVs to manoeuvre.<p>Your SSPK is way WAY too low. Also, the math on interceptions changes completely with multiple KKVs per interceptor (see NGI).<p>Decoys don't work even at the highest end (ICBMs), see Chevaline's history and its rapid decomissioning for an example of just that.</p>
]]></description><pubDate>Thu, 26 Mar 2026 14:18:35 +0000</pubDate><link>https://news.ycombinator.com/item?id=47530790</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47530790</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47530790</guid></item><item><title><![CDATA[New comment by dgroshev in "Missile defense is NP-complete"]]></title><description><![CDATA[
<p>Not sure where the crucial SSPK number came from, given that the referenced link <a href="https://missilethreat.csis.org/system/gmd/" rel="nofollow">https://missilethreat.csis.org/system/gmd/</a> does not have neither the number nor data to calculate it. Even more importantly, using the test history too far back is incorrect, since the system was debugged and refined.<p>Also, a big omission in the post is NGI carrying multiple kill vehicles. Considering the relative cost of a launching system and a KKV, multiple KKVs flip the math quite significantly.</p>
]]></description><pubDate>Thu, 26 Mar 2026 14:10:14 +0000</pubDate><link>https://news.ycombinator.com/item?id=47530691</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47530691</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47530691</guid></item><item><title><![CDATA[New comment by dgroshev in "Dune3d: A parametric 3D CAD application"]]></title><description><![CDATA[
<p>G2 fillets are the next frontier. Even Fusion doesn't seem to handle them well. I mean they can be created without much drama, but geometry derived from them is very likely to fail with no real reason.</p>
]]></description><pubDate>Tue, 24 Mar 2026 13:20:41 +0000</pubDate><link>https://news.ycombinator.com/item?id=47502181</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47502181</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47502181</guid></item><item><title><![CDATA[New comment by dgroshev in "4Chan mocks £520k fine for UK online safety breaches"]]></title><description><![CDATA[
<p>> recused itself<p>Surrendered.</p>
]]></description><pubDate>Fri, 20 Mar 2026 03:35:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=47450171</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47450171</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47450171</guid></item><item><title><![CDATA[New comment by dgroshev in "4Chan mocks £520k fine for UK online safety breaches"]]></title><description><![CDATA[
<p>> more or less politically, culturally, and economically irrelevant<p>I feel like we're reading different posts.</p>
]]></description><pubDate>Fri, 20 Mar 2026 03:34:38 +0000</pubDate><link>https://news.ycombinator.com/item?id=47450166</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47450166</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47450166</guid></item><item><title><![CDATA[New comment by dgroshev in "4Chan mocks £520k fine for UK online safety breaches"]]></title><description><![CDATA[
<p>Is it indicative of "economic irrelevance"?</p>
]]></description><pubDate>Fri, 20 Mar 2026 03:31:35 +0000</pubDate><link>https://news.ycombinator.com/item?id=47450152</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47450152</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47450152</guid></item><item><title><![CDATA[New comment by dgroshev in "4Chan mocks £520k fine for UK online safety breaches"]]></title><description><![CDATA[
<p>> the UK really heading quickly towards a Great Firewall<p>> top most read article on BBC News right now is yet another public sector cover up<p>Do you not see a tiny little bit of contradiction here (regardless of your mis-characterisation of the second link)</p>
]]></description><pubDate>Fri, 20 Mar 2026 00:33:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=47448615</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47448615</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47448615</guid></item><item><title><![CDATA[New comment by dgroshev in "4Chan mocks £520k fine for UK online safety breaches"]]></title><description><![CDATA[
<p>It's not "knocking the US", it's an example of the (likely, projected) decline. The size of the economy is an example of why "irrelevant" is delusional. Two different points.<p>The "prominent UK residents" don't "leave" the UK. Benedict Cumberbatch lives in London, despite constantly starring in Hollywood films. It's an example of the UK culturally punching way above its weight in proportion to its population.</p>
]]></description><pubDate>Thu, 19 Mar 2026 23:56:17 +0000</pubDate><link>https://news.ycombinator.com/item?id=47448277</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47448277</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47448277</guid></item><item><title><![CDATA[New comment by dgroshev in "4Chan mocks £520k fine for UK online safety breaches"]]></title><description><![CDATA[
<p>We need to recognise the difference between the GP rant and what you're describing. The austerity is undeniably still reverberating through the country. It will take years for this ship to turn around, although it <i>is</i> being turned around. For example, in just about a month we're getting European-style rents with the Renter's Rights Act, which is transformational. We can and should do better, and everyone can contribute to solving those issues, but after a decade of nothing the necessary changes are finally being implemented.<p>But the rant is entirely counterfactual. Britain is a very rich country with beautiful and recovering nature, a healthy and educated population, one of the more capable armies in Europe, a functioning deterrent, and a relatively healthy political system. We just got two new parties becoming credible threats to the "main" two (regardless of the parties' views, the political competition itself is a much healthier situation than the American duopoly)! We just abolished hereditary peers, which is a constitutional change (and it can just be done)! Below the everyday media noise, we're doing alright as a democracy.</p>
]]></description><pubDate>Thu, 19 Mar 2026 23:50:54 +0000</pubDate><link>https://news.ycombinator.com/item?id=47448204</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47448204</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47448204</guid></item><item><title><![CDATA[New comment by dgroshev in "4Chan mocks £520k fine for UK online safety breaches"]]></title><description><![CDATA[
<p>This is an entirely delusional twitter-brain take.<p>Despite its problems, the UK is still a sixth largest economy, a cultural powerhouse (how many Hollywood actors are British?), with a lot of soft power, a capable and currently renewed nuclear arsenal (Astraea and Dreadnought are on track), a globe-spanning network of alliances (from AUKUS to Japan deploying to the UK first time in their history to being one of the closest and most unwavering allies for Ukraine), and a constitutionally healthy and adaptive system of government (we just passed another constitutional change and it's not a big deal, we can just do that).<p>Frankly, this meme stinks of projection. Going from a shining city on a hill to a place where public executions by state backed paramilitaries are just another partisan talking point, that starts Special Military Operations with no plan or goal, that threatens to annex territory of its allies in about a year is an achievement. I guess projecting this free fall on the UK makes living through it more bearable.</p>
]]></description><pubDate>Thu, 19 Mar 2026 23:30:48 +0000</pubDate><link>https://news.ycombinator.com/item?id=47447967</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47447967</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47447967</guid></item><item><title><![CDATA[Cinematic Motion, Stuttery Motion, and the Soap Opera Effect]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.rtings.com/tv/learn/research/motion-handling">https://www.rtings.com/tv/learn/research/motion-handling</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=47447727">https://news.ycombinator.com/item?id=47447727</a></p>
<p>Points: 1</p>
<p># Comments: 0</p>
]]></description><pubDate>Thu, 19 Mar 2026 23:12:38 +0000</pubDate><link>https://www.rtings.com/tv/learn/research/motion-handling</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47447727</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47447727</guid></item><item><title><![CDATA[New comment by dgroshev in "MoD sources warn Palantir role at heart of government is threat to UK security"]]></title><description><![CDATA[
<p>GDS is amazing. However, unless we double/triple the GDS salary grades, it'll inevitably be hollowed out. From what I heard, that might've already happened.<p>Look for yourself, GDS is hiring a "Lead Technical Architect" for £67,126–£91,453 <a href="https://gds.blog.gov.uk/jobs/" rel="nofollow">https://gds.blog.gov.uk/jobs/</a> . FAANG (and Palantir) pays up to triple that. How can GDS compete for talent?</p>
]]></description><pubDate>Mon, 16 Mar 2026 20:29:46 +0000</pubDate><link>https://news.ycombinator.com/item?id=47404461</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47404461</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47404461</guid></item><item><title><![CDATA[New comment by dgroshev in "$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor"]]></title><description><![CDATA[
<p>> It means doubling the transport capacity, but not doubling the burden<p>Which is my point, doubling the capacity at the end of the spear is more than double the burden. The scale is superlinear. The further out the front is (for the US, it's over at least one ocean), the more superlinear the scaling is.<p>> but it's not proportional to cost<p>You might've heard of the cheap North Korean shells exploding in barrels, destroying Russian howitzers. It is indeed very disproportional, that's why spending severalfold on better shells is a great tradeoff.<p>> You'd launch two at the same time to take the possibility of failure into account<p>It depends on the ability to launch two. Oftentimes it's impossible; cheap FPV drones interfere with each other, or maybe you don't have double the planes to fly CAS.<p>> how they are being employed today in Ukraine<p>It's logistically impossible to employ the kind of drones Ukraine is employing on the go and organically to infantry. Features and CONOPS that enable organic employment lead to a substantial increase in per-unit prices, see Rogue 1.<p>> A Magura isn't a missile, but it has shown its capability of completely shutting down the Black Sea Fleet.<p>It's three Black Seas worth of distance between Guam and the Taiwan strait. On top of that, nowadays those boats are pretty effectively countered. Overindexing on the war in Ukraine would be a mistake.</p>
]]></description><pubDate>Mon, 16 Mar 2026 10:21:18 +0000</pubDate><link>https://news.ycombinator.com/item?id=47397174</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47397174</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47397174</guid></item><item><title><![CDATA[New comment by dgroshev in "$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor"]]></title><description><![CDATA[
<p>To "look enough" like a missile that can hit something a hundred kilometres away with enough precision to not be ignored you need a missile that can fly a hundred kilometres. This is not cheap.<p>Instead of repeating myself, I'll just link a reply, if you don't mind: <a href="https://news.ycombinator.com/item?id=47389309">https://news.ycombinator.com/item?id=47389309</a></p>
]]></description><pubDate>Mon, 16 Mar 2026 10:09:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=47397102</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47397102</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47397102</guid></item><item><title><![CDATA[New comment by dgroshev in "$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor"]]></title><description><![CDATA[
<p>AAA batteries don't have the current. Li-Ion is too fussy and has a pretty high self-discharge.<p>Ukraine can afford the cardboard boxes because they are fighting in their own country. The US has an ocean to cross.<p>Ukraine can get away with short shelf life because they are at war <i>right now</i>. The US has to stockpile because the supply chain has to run at some capacity in peace time to be able to ramp up quickly when needed, and discarding the produced ammunition after a year would be incredibly wasteful.<p>Neither Ukraine nor Russia can defeat each others' air defence networks. The US has a lot of experience doing just that, while successfully defending against ballistic missiles. High tier capabilities matter.<p>The Patriot in 1980 is a very different system from the Patriot that is fielded today. Between PAC-2 and PAC-3, AN/MPQ-65A and LTAMDS it's a cutting edge air defence system. The progress is constantly incorporated.<p>The Stinger is a bit old, but mostly because the US doctrine has few uses for it. Regardless, NGSRI is coming.</p>
]]></description><pubDate>Sun, 15 Mar 2026 21:42:34 +0000</pubDate><link>https://news.ycombinator.com/item?id=47392267</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47392267</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47392267</guid></item><item><title><![CDATA[New comment by dgroshev in "$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor"]]></title><description><![CDATA[
<p>It's an objective statement of their tactics, not something relative.<p>Modern precision guided weaponry is meant to selectively destroy military targets. WW2 style strategic bombing was targeting civilian populations mostly trying to disrupt industrial production in support of military action. Randomly firing a few unguided rockets into civilian population centres can't possibly achieve either. The only goal is to provoke terror in the civilian population, therefore it's a terrorist organisation.<p>You can see similar tactics in the "human safari" the Russians are running in several Ukrainian population centres.</p>
]]></description><pubDate>Sun, 15 Mar 2026 20:45:21 +0000</pubDate><link>https://news.ycombinator.com/item?id=47391697</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47391697</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47391697</guid></item><item><title><![CDATA[New comment by dgroshev in "$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor"]]></title><description><![CDATA[
<p>We're absolutely not running out of APKWS. They are manufactured by tens of thousands, and Hydra 70s are even more numerous.</p>
]]></description><pubDate>Sun, 15 Mar 2026 20:33:54 +0000</pubDate><link>https://news.ycombinator.com/item?id=47391584</link><dc:creator>dgroshev</dc:creator><comments>https://news.ycombinator.com/item?id=47391584</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47391584</guid></item></channel></rss>