jedc

Joined 18 years ago

Karma
3,287
Submissions
851
Member since
Jul 18
Creator of Seed-DB (http://www.seed-db.com), information and analysis of seed accelerators (like YC) worldwide.

Former entrepreneur, Xoogler, former US Navy submarine officer, solar car racer, musician (drummer/percussionist). I blog at http://blog.jedchristiansen.com.

I work at Golden - golden.com.

Stuff I've created/written relevant to HN:

http://www.seed-db.com http://blog.jedchristiansen.com/pmarcaarchive/ http://blog.mercury-rac.com

[ my public key: https://keybase.io/jedc; my proof: https://keybase.io/jedc/sigs/6XSBE8vgLWzZ5Kr5VPv_HzRswK3jetw9SP44q0s0ufQ ]

-----CONTACT------

jed.christiansen {AT} gmail jed.christiansen {AT} seed-db.com @jedc on Twitter

View on Hacker News

Recent submissions

Comment · 4 months ago
It looks like the account where this repo was published was the one used by Google Workspace DevRel? (And that’s the team this guy worked on.)

That makes this quite a bit different situation than publishing the repo on a personal account.

Comment · 7 months ago
Data points that worry me:

02/1967 - Apollo 1 fire

01/1986 - Challenger disaster (19 yrs later)

02/2003 - Columbia disaster (17 yrs later)

It's been 23 years since Columbia, and there seems to be a 20-ish year rhythm to NASA disasters where the organization learns lessons, becomes more careful... and then standards potentially slip.

Comment · 11 months ago
from the docs:

"Wealthfolio does not currently support integration with online brokers or aggregators. Data must be imported from CSV files or by manually entering transactions."

Comment · 1 year ago
"store contact information and related notes for small and medium businesses"

Most likely translation: it affected the Google SMB sales team's Salesforce instance

Comment · 1 year ago
I was visiting Yosemite a year-ish ago and a guide recommended this app and it was fantastic. My kids also loved getting the real-time info on what they were hearing, and trying to spot the various kinds of birds.

Strongly recommend it (though admittedly, I don't use it often in suburbia)

Comment · 1 year ago
(Former submariner here.)

Elevated CO2 in submarines absolutely impairs performance. One example: there was a guy on my boat who got migraines when CO2 got too high - he was useless. Luckily the fix is simple - just turn on another CO2 scrubber.

There's nothing special about a submarine that makes CO2 somehow different than anywhere else.

Comment · 1 year ago
I used to row in London on the Thames, and yeah, the tides are nuts. The river rises seven meters in the span of about 3-4 hours. (It takes about 7-8 hours to flow out.)
Comment · 2 years ago
Comment · 3 years ago
Sounds like the plot of Michael Crichton's book "Airframe" - https://en.wikipedia.org/wiki/Airframe_(novel)

(Though in this case the parts were found before anyone was hurt/killed!)

Comment · 3 years ago
It's unlikely to go offline. They've got the funding to keep it open, they're just waiting on federal acceptance of their continuation plans.
Comment · 3 years ago
Comment · 3 years ago
Comment · 3 years ago
The main thing is that you need to be moving at least a few knots in order for your control surfaces (rudder, forward planes, stern planes) to work.
Comment · 3 years ago
The US doesn't have diesel boats anymore. Though other countries (like Australia) do.
Comment · 3 years ago
antenna buoys on cables? No.

But there are VLF antennas that Ohio-class submarines have to receive low-data-rate comms while submerged.

Any reasonable communications have to be made while at periscope depth. (Which is subtly different than "having to surface"... at PD just the thin mast is out of the water.)

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