tjohns

43 ms·

541.
by tjohns 7y ago
VOR navigation is very much still a thing. They've been reducing the number of redundant ground stations lately as part of a project called "Minimum Operational Network", or "MON". (Mostly on affecting the east coas
542.
by tjohns 7y ago
Do you have any citations from the FAA for that? Given that then ADS-B mandate was just a couple weeks ago, it seems logistically odd that secondary radar would already be turned off. More generally, my understanding was that the FAA was ke
543.
by tjohns 7y ago
- EPIRB = Fixed unit, installed on a boat. Water activated. - ELT = Fixed unit, installed on an airplane. G-force activated. - PLB = Handheld unit for individuals. Manually activated only. They're all the same technology, but the form
544.
by tjohns 7y ago
In most places in the US, rescue is free as long as it's legitimate and you weren't being completely reckless. They may chose to charge for false alarms, or if you did something that was completely and unambiguously boneheaded (e.
545.
by tjohns 7y ago
For the aircraft units (ELTs), it's triggered by g-forces. Almost all aircraft in the US are required to have an ELT beacon installed on-board, though many are still equipped with the old analog (121.5 MHz) technology which isn't
546.
by tjohns 7y ago
The functionality exists, and many receipts already do get uploaded into the credit card network. It’s called “Level 3” transaction data. This is especially true for air travel, where ticket details are almost always attached to the charge.
547.
by tjohns 7y ago
We’ve had offline GPS units for decades. You could easily have a database of every stop sign, and it would fit on an SD card.
548.
by tjohns 7y ago
Venmo is far from ubiquitous. (None of my friends or family have a Venmo account, for instance. They prefer other apps like Square Cash / Google Pay / PayPal, or don’t use payment apps at all.) Debit cards are not popular here bec
549.
by tjohns 7y ago
That assumes there’s no long term cancer risk from vaping, which we simply don’t know yet.
550.
by tjohns 7y ago
The person flying a Cessna literally has their life on the line, the drone operator does not. Also, the person flying a Cessna has to get significant training and has to follow the same rules as someone flying a 737, the drone operator does
551.
by tjohns 7y ago
ADS-B has always had an "anonymous" option for aircraft using the UAT uplink, as long as they're squawking 1200/VFR. (Similarly, there's long been a way to request that specific aircraft are hidden from the FAA&#x27
552.
by tjohns 7y ago
This sounds a lot like optical coherence tomography (OCT), which is essentially laser-based “ultrasound” used to image the inside of retinal tissue. (It’s not actually ultrasound, it’s entirely optical but uses similar principles.) https:&
553.
by tjohns 7y ago
The Elvis Operator is particularly useful because it's such a common pattern in Kotlin, since the language enforces null safety. When you're using a legacy Java API without nullability annotations, the language forces you to expli
554.
by tjohns 7y ago
Who said anything about diesel? Airlines can already purchase biofuel-derived Jet A. Distribution is still limited, but it is available at a few major airports. For instance, I just took a flight on SAS. They have an option to pay extra to
555.
by tjohns 7y ago
Couldn’t one buy carbon credits to offset the emissions? Or pay extra to fill up the plane with a carbon-neutral biofuel?
556.
by tjohns 7y ago
As a datapoint... Back in elementary school 25 years ago, they most certainly were teaching my class that plastic doesn’t decompose and how important it was to reduce waste.
557.
by tjohns 7y ago
The problem with that plan is that broadcast radio does not let two stations (in the same general area) share the same frequency, period. So you need to have frequency coordination. Compare with the ISM bands, like 2.4 GHz, where you can us
558.
by tjohns 7y ago
Rate limiting would not prevent individuals running their own bots, or a service that uses a different IP for each request.
559.
by tjohns 7y ago
It'd also be very trivial to script with a Mac using Folder Actions and a 5 line AppleScript. (I wish Linux had an equivalent to Folder Actions. They’re really nifty.)
560.
by tjohns 7y ago
Can you actually visualize the heart rhythm using a Polar band? For some reason, I always thought they only sent the pulse rate. Or are you able to detect AFib using pulse rate alone?
561.
by tjohns 7y ago
Japan has this... a common design is to have the bathroom sink drain directly into the toilet's water reservoir, so the grey water is used for the next flush. No changes to plumbing needed, since it's all built into the fixtures.
562.
by tjohns 7y ago
Absolutely! I use Google Assistant to control my home automation (mostly lights and TV), check commute times when leaving for work, play NPR, and occasional Wikipedia lookups that don't warrant pulling a phone out. I also use the Leido
563.
by tjohns 7y ago
I've had the opposite experience. On Linux, you just open up a text editor, write some C/Python, then pop open a terminal and directly invoke gcc/python. There's typically nothing that needs to be installed - and if some
564.
by tjohns 7y ago
I think this is definitely a bit of self-selection. I find phone calls are still better for conducting complex business - not everything can (or should) be scripted using a form, and a phone call sometimes is much more efficient than chat
565.
Garmin Emergency Autoland Flight Trial(youtube.com)
3 points by tjohns 7y ago|0 comments
566.
by tjohns 7y ago
This got me reading up on the topic, and apparently you can download a free book from the FAA that covers how to do celestial navigation: Flight Navigator Handbook, https://www.faa.gov/regulations_policies/handbooks_man
567.
by tjohns 7y ago
They're working on a replacement for 100LL avgas, thankfully. There's some flight safety concerns that have delayed it, but it's still a work in progress.
568.
by tjohns 7y ago
Because they live in the US, and therefore by law should have representation. (Note that they still can't vote, so the influence is limited.) Permanent residency is very much a thing allowed by law. Dismissing them as foreigners is a b
569.
Webmin 1.890 Exploit – What Happened?(webmin.com)
2 points by tjohns 7y ago|2 comments
570.
by tjohns 7y ago
> Why are you asking your end-users to manually install your development dependencies, though? If you want to run a legacy desktop Java application (without bundled JRE - and yes, there's still plenty of these apps out there), MacOS

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