Hacker News: lsh123

New comment by lsh123 in "The Wright brothers invented the airplane, right? Not if you're in Brazil"

lsh123 — Mon, 24 Mar 2025 18:29:53 +0000

https://www.wright-brothers.org/History_Wing/History_of_the_...

New comment by lsh123 in "Starship Flight 7"

lsh123 — Thu, 16 Jan 2025 23:05:14 +0000

Cool video of the upper stage breakup from Turks and Caicos

New comment by lsh123 in "The Wired Guide to Protecting Yourself from Government Surveillance"

lsh123 — Tue, 12 Nov 2024 16:53:33 +0000

tin foil hat, that's the only way :)

New comment by lsh123 in "Mira Murati leaves OpenAI"

lsh123 — Thu, 26 Sep 2024 02:06:56 +0000

Treason doth never prosper, what’s the reason? For if it prosper, none dare call it Treason.

New comment by lsh123 in "Launch HN: Airhart Aeronautics (YC S22) – A modern personal airplane"

lsh123 — Tue, 06 Aug 2024 02:00:06 +0000

My $0.02:

- The stick-and-rudder skills aren’t hard and not the main reason people die. It’s the decision making that kills.

- The “faster to fly” than drive for me starts at about 3 hrs drive (wind, preflight time, takeoff / climb / landing time, deviations by ATC, etc). My indicated airspeed is roughly your true btw.

- Looks and feels like Cirrus with AI. I am missing barn doors for luggage and dogs; 200 kts cruise; 6 hrs with tip tanks; and gross to actually do it. I’ll stick with my Bonanza.

- Main problem you will face is insurance. It will be expensive if even obtainable for low experienced pilots.

New comment by lsh123 in "Japan stocks plunge as much as 7% as Asia shares extend sell-off"

lsh123 — Mon, 05 Aug 2024 03:14:41 +0000

With 10+% annual inflation in US in the last 2-3 years, 20+ P/E doesn’t look bad at all. Actually anything under 40 or so should be a strong buy.

New comment by lsh123 in "Swift Homomorphic Encryption"

lsh123 — Wed, 31 Jul 2024 00:10:08 +0000

Thanks for explanation. I will read the code to see how sharing works.

New comment by lsh123 in "Swift Homomorphic Encryption"

lsh123 — Tue, 30 Jul 2024 23:49:42 +0000

That’s not what I saw in the code but I didn’t spend much time so I might be wrong. I’ll check it more carefully later. But if this indeed is whole DB then it’s very limited use case.

New comment by lsh123 in "Swift Homomorphic Encryption"

lsh123 — Tue, 30 Jul 2024 23:47:54 +0000

Does the server reads specific rows from spam numbers DB or the whole database?

New comment by lsh123 in "Swift Homomorphic Encryption"

lsh123 — Tue, 30 Jul 2024 23:25:37 +0000

Evil server stores BOTH encrypted and plain text phone number in the same db row

New comment by lsh123 in "Swift Homomorphic Encryption"

lsh123 — Tue, 30 Jul 2024 23:25:06 +0000

Exactly, plain text phone number in the same db row

New comment by lsh123 in "Swift Homomorphic Encryption"

lsh123 — Tue, 30 Jul 2024 23:01:08 +0000

If we assume that server is “evil” then the server can store both PIR encrypted and plain text phone number in the same row in the database and when this row is read, simply log plain text phone number. What do I miss here? We can send PIR request and trust server not to do the above; or we can send plain text phone number and trust server not to log it — what’s the difference?

New comment by lsh123 in "Super Heavy has splashed down in The Gulf of Mexico"

lsh123 — Fri, 07 Jun 2024 00:58:59 +0000

Since for telescope what matters is the surface size of the mirror (light collected is proportional to surface which is proportional to r^2), the 9m telescope is ~1.9x better than 6.5m one. This is a big difference. Not even counting the loses from a non perfect alignment of a folding mirror compared to a fixed one.

New comment by lsh123 in "Cyber Security: A pre-war reality check"

lsh123 — Sat, 18 May 2024 17:00:19 +0000

Not sure what exactly are you looking for. Bunch of info is on FAA website, for example:

https://www.faa.gov/air_traffic/publications/atpubs/aim_html... https://www.faa.gov/air_traffic/flight_info/aeronav/acf/medi...

New comment by lsh123 in "Cyber Security: A pre-war reality check"

lsh123 — Sat, 18 May 2024 16:28:59 +0000

DME (distance measuring equipment) is much simpler than LORAN. However, navigation computers can use multiple VOR / DME signals to compute position similar to LORAN or GPS. The problem is that DME / VOR are typically limited to 50-200nm (and even lower at lower altitudes) which requires extensive network to make it comparable to GPS / LORAN.

New comment by lsh123 in "Simon Riggs has died"

lsh123 — Fri, 29 Mar 2024 13:16:53 +0000

Botched go around killed many pilots. May be trimmed too much up for landing with flaps and didn’t push nose down hard enough. In general, touch and goes in a high performance planes is not a good idea (no time for checklists, runway length, and actually wrong muscle memory for real takeoffs / landings). RIP.

New comment by lsh123 in "Margaret Mead, John von Neumann, and the Prehistory of AI"

lsh123 — Tue, 19 Mar 2024 20:42:21 +0000

AI history starts from Newton gradient descent ;)

New comment by lsh123 in "Meta outage"

lsh123 — Tue, 05 Mar 2024 15:55:53 +0000

WhatsApp works for me

New comment by lsh123 in "What flying was like fifty years ago"

lsh123 — Tue, 05 Mar 2024 01:39:36 +0000

"You know nothing, Jon Snow"

New comment by lsh123 in "What flying was like fifty years ago"

lsh123 — Tue, 05 Mar 2024 01:36:37 +0000

I also got my license around that time with eb6, paper charts, VORs, NDB approaches, … and I don’t miss it a bit. Nostalgia - yes. But not missing it. I like to fly direct, I like to get LPV approach to 200 feet at an airport that would never ever ever would had had an ILS installed, I like traffic and weather on ADSB, I like my ForeFlight, and list goes on. The new technology helps to make flying safer. Yes, you need to know how to use all of this. And yes, it’s complicated. But the benefits are great too.