<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: kumarski</title><link>https://news.ycombinator.com/user?id=kumarski</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Mon, 20 Apr 2026 23:39:35 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=kumarski" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by kumarski in "Live Nation illegally monopolized ticketing market, jury finds"]]></title><description><![CDATA[
<p>Venue contracts are a sort of political firewall against any relevant ticketing technology becoming massive globally.<p>Music festivals were a sort of guerilla attack on lack of venue contracts.</p>
]]></description><pubDate>Wed, 15 Apr 2026 20:03:15 +0000</pubDate><link>https://news.ycombinator.com/item?id=47784486</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=47784486</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47784486</guid></item><item><title><![CDATA[New comment by kumarski in "OpenAI has deleted the word 'safely' from its mission"]]></title><description><![CDATA[
<p>Former NSA Director and retired U.S. Army General Paul Nakasone joined the Board of Directors at OpenAI in June 2024.<p>OpenAI announced in October 2025 that it would begin allowing the generation of "erotica" and other mature, sexually explicit, or suggestive content for verified adult users on ChatGPT.</p>
]]></description><pubDate>Sat, 14 Feb 2026 00:29:18 +0000</pubDate><link>https://news.ycombinator.com/item?id=47009848</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=47009848</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47009848</guid></item><item><title><![CDATA[New comment by kumarski in "Show HN: A free online British accent generator for instant voice conversion"]]></title><description><![CDATA[
<p>I live in London part of the year.</p>
]]></description><pubDate>Thu, 12 Feb 2026 12:07:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=46987743</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=46987743</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46987743</guid></item><item><title><![CDATA[New comment by kumarski in "Show HN: A free online British accent generator for instant voice conversion"]]></title><description><![CDATA[
<p>This needs a Roadman accent. Plz.<p>Awesome stuff.</p>
]]></description><pubDate>Thu, 12 Feb 2026 11:21:51 +0000</pubDate><link>https://news.ycombinator.com/item?id=46987398</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=46987398</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46987398</guid></item><item><title><![CDATA[New comment by kumarski in "90M people. 118 hours of silence. One nation erased from the internet"]]></title><description><![CDATA[
<p>I didn't make the metric.<p>Got downvotes, not sure why.<p><a href="https://www.newsweek.com/poll-americans-cant-locate-iran-map-1481346" rel="nofollow">https://www.newsweek.com/poll-americans-cant-locate-iran-map...</a></p>
]]></description><pubDate>Wed, 14 Jan 2026 21:10:34 +0000</pubDate><link>https://news.ycombinator.com/item?id=46623491</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=46623491</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46623491</guid></item><item><title><![CDATA[New comment by kumarski in "90M people. 118 hours of silence. One nation erased from the internet"]]></title><description><![CDATA[
<p>I do find it odd that ~80% of Americans can't point out Iran on a map.</p>
]]></description><pubDate>Tue, 13 Jan 2026 18:35:47 +0000</pubDate><link>https://news.ycombinator.com/item?id=46605552</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=46605552</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46605552</guid></item><item><title><![CDATA[UX4G Indian Government Design System]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.ux4g.gov.in">https://www.ux4g.gov.in</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=46413520">https://news.ycombinator.com/item?id=46413520</a></p>
<p>Points: 2</p>
<p># Comments: 0</p>
]]></description><pubDate>Sun, 28 Dec 2025 19:04:48 +0000</pubDate><link>https://www.ux4g.gov.in</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=46413520</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46413520</guid></item><item><title><![CDATA[New comment by kumarski in "Cloudflare Global Network experiencing issues"]]></title><description><![CDATA[
<p>I'm going to buy more.</p>
]]></description><pubDate>Tue, 18 Nov 2025 12:24:17 +0000</pubDate><link>https://news.ycombinator.com/item?id=45964635</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=45964635</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45964635</guid></item><item><title><![CDATA[Who Exactly Is a "Real Chemist"?]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.science.org/content/blog-post/who-exactly-real-chemist">https://www.science.org/content/blog-post/who-exactly-real-chemist</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=45485627">https://news.ycombinator.com/item?id=45485627</a></p>
<p>Points: 3</p>
<p># Comments: 2</p>
]]></description><pubDate>Sun, 05 Oct 2025 21:55:34 +0000</pubDate><link>https://www.science.org/content/blog-post/who-exactly-real-chemist</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=45485627</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45485627</guid></item><item><title><![CDATA[New comment by kumarski in "Vercel CEO meets with Netanyahu to discuss AI education"]]></title><description><![CDATA[
<p>I was so confused, I thought vercel had an outage. 
This makes more sense now.<p>I got 3 different calls from some people today about Vercel and switching off of it, couldn't figure out why - they were spending upwards of 5k-10k/mo.</p>
]]></description><pubDate>Mon, 29 Sep 2025 22:09:30 +0000</pubDate><link>https://news.ycombinator.com/item?id=45419417</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=45419417</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45419417</guid></item><item><title><![CDATA[China Won the Chip War While You Were Arguing About Gallium]]></title><description><![CDATA[
<p>Article URL: <a href="https://kumarletter.com/posts/past-the-rare-earth-theater-how-china-actually-won-the-chip-war-while-you-were-arguing-about-gallium">https://kumarletter.com/posts/past-the-rare-earth-theater-how-china-actually-won-the-chip-war-while-you-were-arguing-about-gallium</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=44578869">https://news.ycombinator.com/item?id=44578869</a></p>
<p>Points: 5</p>
<p># Comments: 0</p>
]]></description><pubDate>Wed, 16 Jul 2025 05:09:28 +0000</pubDate><link>https://kumarletter.com/posts/past-the-rare-earth-theater-how-china-actually-won-the-chip-war-while-you-were-arguing-about-gallium</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=44578869</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44578869</guid></item><item><title><![CDATA[New comment by kumarski in "Cloudflare to introduce pay-per-crawl for AI bots"]]></title><description><![CDATA[
<p>Funny finding you here. ;)<p>Hey Orlie.</p>
]]></description><pubDate>Tue, 01 Jul 2025 19:09:26 +0000</pubDate><link>https://news.ycombinator.com/item?id=44437087</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=44437087</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44437087</guid></item><item><title><![CDATA[The Role of Social Media in Cartel Recruitment]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.csis.org/analysis/role-social-media-cartel-recruitment">https://www.csis.org/analysis/role-social-media-cartel-recruitment</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=44189044">https://news.ycombinator.com/item?id=44189044</a></p>
<p>Points: 4</p>
<p># Comments: 0</p>
]]></description><pubDate>Thu, 05 Jun 2025 06:53:45 +0000</pubDate><link>https://www.csis.org/analysis/role-social-media-cartel-recruitment</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=44189044</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44189044</guid></item><item><title><![CDATA[Mysterious Case $15B Startup and Its Anonymous Multi-Billion Dollar Investor]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.forbes.com/sites/phoebeliu/2025/04/24/infinite-reality-john-acunto-155-billion-metaverse-startup-biggest-fundraise/">https://www.forbes.com/sites/phoebeliu/2025/04/24/infinite-reality-john-acunto-155-billion-metaverse-startup-biggest-fundraise/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=43828813">https://news.ycombinator.com/item?id=43828813</a></p>
<p>Points: 5</p>
<p># Comments: 0</p>
]]></description><pubDate>Tue, 29 Apr 2025 05:01:04 +0000</pubDate><link>https://www.forbes.com/sites/phoebeliu/2025/04/24/infinite-reality-john-acunto-155-billion-metaverse-startup-biggest-fundraise/</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=43828813</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43828813</guid></item><item><title><![CDATA[New comment by kumarski in "Electric Propulsion's Dirty Secret: Why Lithium Can't Fly (Or Float) Profitably"]]></title><description><![CDATA[
<p>Don't have time to reply to everyone. Clearly triggered a lot of programmers here, so I'll try to go point by point.<p>Electric motors are ~3× more efficient, but the crushing 18:1 energy density disadvantage (170-180 Wh/kg usable vs. 3,200 Wh/kg for jet fuel) creates a physics trap no engineer can escape [1].<p>A staggering 70.3% of total energy is consumed before the damn thing even moves – manufacturing (35.2%), extraction (19.8%), and processing (15.3%) create an energy debt that makes the whole proposition a joke[2]<p>Grids: Carbon intensity varies wildly (200-840g CO₂e/kWh), meaning your "clean" electric plane is often dirtier than conventional systems – that's not an opinion, it's EPA data [3].<p>Real-world performance nightmare is quantified: cold weather operations see a brutal 33% range reduction vs. just 6% for conventional, charging wastes 22.4% operational efficiency, and VTOL applications – which fanboys love to cite – require 2.5-3× more energy per mile than normal flight [4].<p>We've seen improvements (2.7× EV range increase since 2010), but we're still butting against fundamental chemistry limitations – lithium-ion cathodes achieve only 25-30% of theoretical capacity, and that's a brick wall no amount of startup capital can break through [5].<p>Synthetic fuels? Give me a break – 10-15% round-trip efficiency means you need 6.7-10× more renewable capacity than direct electrification, basically requiring us to cover half the planet in solar panels [6].<p>I explicitly acknowledge where electric makes sense (short-haul ferries under 50 miles, puddle-jumper aircraft), while demonstrating why crossing oceans remains physically impossible without a battery chemistry revolution [7].<p>lithium propulsion systems cost $245-380/kWh delivered vs. $75-110/kWh for conventional systems – that's 3.3× more expensive with no way to close the gap without massive taxpayer subsidies [8].<p>If this technology truly made economic and environmental sense, why isn't China – which manufactures most of the world's batteries and has the densest transportation networks requiring efficiency – adopting it at scale for their own infrastructure? 
They desperately need cleaner air and water, have explicitly prioritized environmental improvements in recent policy, and would recognize a truly superior EROI technology before anyone. Their purchase behavior speaks very loud.<p>[1] Society of Automotive Engineers, Technical Paper 2024-01-0873, <a href="https://www.sae.org/publications/technical-papers/content/2024-01-0873" rel="nofollow">https://www.sae.org/publications/technical-papers/content/20...</a><p>[2] Journal of Industrial Ecology, 24(1), 120-132, <a href="https://onlinelibrary.wiley.com/journal/15309290" rel="nofollow">https://onlinelibrary.wiley.com/journal/15309290</a><p>[3] EPA eGRID 2023, <a href="https://www.epa.gov/egrid" rel="nofollow">https://www.epa.gov/egrid</a><p>[4] IEEE Transportation Electrification, 10(2), 1582-1593, <a href="https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6687316" rel="nofollow">https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=668...</a><p>[5] Nature Energy, <a href="https://www.nature.com/articles/s41560-022-01060-5" rel="nofollow">https://www.nature.com/articles/s41560-022-01060-5</a><p>[6] International Energy Agency, "The Role of Critical Minerals in Clean Energy Transitions", <a href="https://www.iea.org/reports/the-role-of-critical-minerals-in-clean-energy-transitions" rel="nofollow">https://www.iea.org/reports/the-role-of-critical-minerals-in...</a><p>[7] Maritime Economics & Logistics, 26(2), 112-128, <a href="https://link.springer.com/journal/41278" rel="nofollow">https://link.springer.com/journal/41278</a><p>[8] Journal of Transport Economics, 58(2), 234-248, <a href="https://www.journals.elsevier.com/journal-of-transport-economics-and-policy" rel="nofollow">https://www.journals.elsevier.com/journal-of-transport-econo...</a></p>
]]></description><pubDate>Mon, 21 Apr 2025 02:00:18 +0000</pubDate><link>https://news.ycombinator.com/item?id=43747932</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=43747932</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43747932</guid></item><item><title><![CDATA[New comment by kumarski in "Electric Propulsion's Dirty Secret: Why Lithium Can't Fly (Or Float) Profitably"]]></title><description><![CDATA[
<p>Full lifecycle comparison included both systems<p><a href="https://www.journals.elsevier.com/journal-of-transport-economics-and-policy" rel="nofollow">https://www.journals.elsevier.com/journal-of-transport-econo...</a></p>
]]></description><pubDate>Mon, 21 Apr 2025 01:52:08 +0000</pubDate><link>https://news.ycombinator.com/item?id=43747899</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=43747899</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43747899</guid></item><item><title><![CDATA[New comment by kumarski in "Electric Propulsion's Dirty Secret: Why Lithium Can't Fly (Or Float) Profitably"]]></title><description><![CDATA[
<p>System-level efficiency negates motor advantage<p><a href="https://www.sae.org/publications/technical-papers/content/2024-01-0873" rel="nofollow">https://www.sae.org/publications/technical-papers/content/20...</a></p>
]]></description><pubDate>Mon, 21 Apr 2025 01:50:54 +0000</pubDate><link>https://news.ycombinator.com/item?id=43747895</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=43747895</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43747895</guid></item><item><title><![CDATA[New comment by kumarski in "Hydrogen vs. Battery Buses: A European Transit Reality Check"]]></title><description><![CDATA[
<p>Hydrogen buses limp at an EROI of 0.5 to 1.5.<p>Losses via Gibbs free energy (237 kJ/mol to split H2O) and compression (20% of H2’s 120 MJ/kg.)<p>Barely cash in on the H2-O2 reaction (ΔH = -285.8 kJ/mol).<p>Battery buses, powered by lithium-ion cells, hit EROI of 2 to 4.<p>Redox heavy lithium mining (150 MJ/kg) drags it all down.<p>Charge-discharge losses (90% Coulombic efficiency)+ 5-10% capacity fade after 1000 cycles.<p>All trails diesel’s 5-10 EROI and 46 MJ/kg density.</p>
]]></description><pubDate>Sat, 19 Apr 2025 03:20:07 +0000</pubDate><link>https://news.ycombinator.com/item?id=43733963</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=43733963</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43733963</guid></item><item><title><![CDATA[New comment by kumarski in "Electric Propulsion's Dirty Secret: Why Lithium Can't Fly (Or Float) Profitably"]]></title><description><![CDATA[
<p>I directly compared them in visualization 6 ($75-110/kWh conventional vs. $245-380/kWh lithium, all externalities included). Electric ekranoplans would be badass, and sealed motors solve one problem, but battery chemistry is the real beast – we're bumping against molecular bond limitations, not just engineering challenges. Current lithium-ion cathodes are only achieving 25-30% of their theoretical capacity limits, while lithium-sulfur promises 2-3× better density but sacrifices cycle life. Trust me, I want electric propulsion to succeed, but we need fundamental chemical breakthroughs beyond intercalation mechanisms. Got any data on those Soviet experiments? Those Russians were decades ahead on some wild electrochemistry concepts.</p>
]]></description><pubDate>Fri, 18 Apr 2025 22:54:56 +0000</pubDate><link>https://news.ycombinator.com/item?id=43732599</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=43732599</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43732599</guid></item><item><title><![CDATA[New comment by kumarski in "Electric Propulsion's Dirty Secret: Why Lithium Can't Fly (Or Float) Profitably"]]></title><description><![CDATA[
<p><2.5% of US vehicles are electric.<p>I bought $AMR, $FCG, $UAN, and $POWL.<p>I bought $TSLA and sold almost at the top as well, but for different reasons than fundamentals. (Greenback boomerang CCP dollars etc...)<p>Chemistry doesn't lie and it imputes all of human behavior.</p>
]]></description><pubDate>Fri, 18 Apr 2025 22:52:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=43732588</link><dc:creator>kumarski</dc:creator><comments>https://news.ycombinator.com/item?id=43732588</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43732588</guid></item></channel></rss>