maccam94

8 ms·

31.
by maccam94 4y ago
https://wccftech.com/spacex-starlink-satellite-laser-test/
32.
by maccam94 4y ago
> as far as I'm aware it hasn't been openly demonstrated to work yet They did a test in late 2020[0], and all launches since June 2021 have been Starlink v1.5 with lasers[1]. 0: https://wccftech.com/spacex-starl
33.
by maccam94 4y ago
Starlink v1.5 has lasers, and that is what they have been launching since January of last year.
34.
by maccam94 4y ago
> try to do a squash merge to the main, then do some other changes in your branch, and try to merge again For this situation, at the end just do: git rebase -i main And delete all of the commits that you included in your squashed commit
35.
by maccam94 4y ago
Beware, you may need to do a significant amount of sysctl tuning/mount option tweaking to get fast NFS performance over high latency networks.
36.
by maccam94 4y ago
Many suburbs have school buses but no other pubic transportation.
37.
by maccam94 4y ago
Streams are opt-in. Topics are transient and fast to create, and everyone in the stream will automatically see the new topic. You also get per-topic read position tracking, and stream members can mute individual topics if they want. You can
38.
by maccam94 4y ago
The thread-first model is quite different from the free-for-all channel model in IRC/Slack. Imagine the chaos in your email inbox if messages didn't have subject lines or threads. Zulip makes it actually feasible to follow a chat
39.
by maccam94 4y ago
Why? Propellant is relatively light in an NTR system as far as I'm aware. I am also assuming that making a nuclear ship aerodynamic would be unfeasible (it will likely be long and only structurally reinforced longitudinally).
40.
by maccam94 4y ago
I am assuming that you can spend the delta-v at both launch and intercept, it sounds like you are assuming it is all used at launch?
41.
by maccam94 4y ago
From what I've read NERVA was actually killed by Nixon for political (cost) reasons. https://en.wikipedia.org/wiki/NERVA#Cancellation
42.
by maccam94 4y ago
>Only at extreme delta V levels do NTRs actually get better performance, but that's not a mission-to-Mars territory Why is that not mission-to-Mars territory? You can shave months off the transit time with >15km/s delta-v.
43.
by maccam94 4y ago
Starlink orbits are far too low for kessler syndrome. Atmospheric drag would clear them out in <10 years, probably much less. In fact, Starlink satellites are far too numerous for anti-satellite weapons to be effective (at least, until c
44.
by maccam94 4y ago
Thank you for writing this. I thought I had heard of this guy before. I was about to write a lengthy rebuttal myself.
45.
by maccam94 4y ago
Tesla doesn't have anything to do with Starship launch prices. Let's look at costs to SpaceX for launches, since those are the most relevant numbers: Reused Falcon 9 launch: $15M[1] in the best case, but let's double it just
46.
by maccam94 4y ago
The citizens of Russia could vote out or overthrow their leader. The goal of sanctions isn't indiscriminate pain, it is to incur a cost for bad behavior and encourage people to stop it. I think cutting off technology services to a coun
47.
by maccam94 4y ago
The original poster is in Russia, which is why they care about GitHub being involved: GitHub is obeying US sanctions against Russia over the war in Ukraine. Any authentication service operating in the US or in another US-aligned nation woul
48.
by maccam94 4y ago
I think the root cause here is that people are afraid to live near nuclear plants, and would get mad at their political representatives if they got built in their area. Making these limits more stringent makes it look like the politicians a
49.
by maccam94 4y ago
Credit/debit cards and checks are totally different systems. Cards can be checked for available funds instantly. Checks need to be cleared through the ACH system (in the US at least), which is an asynchronous process that might take mo
50.
by maccam94 4y ago
In vim specifically, there are many more powerful and precise movements you can make by chaining motions. But before those can feel natural and fast, you have to keep your hands on home row.
51.
by maccam94 5y ago
The main differentiator of Zulip IMO is the threading model. Instead of chat rooms with multiple un-separated concurrent conversations taking place, every message* must start a topic or be placed in one (topics are like the subject line in
52.
by maccam94 5y ago
CFS is aiming to have an operational demo reactor that is net energy positive in 2025, and a full scale reactor feeding power into the electric grid in the early 2030s. https://cfs.energy/technology
53.
by maccam94 5y ago
No, it's not weird at all that the mainstream media wouldn't publish such a story without multiple sources right before an election https://en.wikipedia.org/wiki/Biden%E2%80%93Ukraine_conspira...
54.
by maccam94 5y ago
https://www.reddit.com/r/rust/comments/iqq8k9/announcing_act... https://www.reddit.com/r/rust/comments/t1bim5/announcing_act...
55.
by maccam94 5y ago
The ISS orbit naturally decays without regular boosts due to atmospheric drag. I'm hopeful that Starship is fully operational by the time the ISS reaches EOL, maybe a few Starship launches would have enough delta-V to push the ISS up i
56.
by maccam94 5y ago
But why not build an even bigger space station by combining payloads from multiple launches?
57.
by maccam94 5y ago
Last I heard, reusable F9 launches cost SpaceX ~$30M. The goal is for Starship launches to cost about $2M, for ~5x the payload mass. Starship is also necessary for Starlink launches to be economical for the full constellation deployment.
58.
by maccam94 5y ago
The heat shield isn't a blocker for getting to orbit, it's only needed to recover the second stage. Musk thinks that the Florida launch site will be ready before the end of the year anyway (and sure, add a few months for Elon Time
59.
by maccam94 5y ago
I think it's likely that SpaceX recognized that FAA approval could take a while, so they started putting more polish into the launch infrastructure, booster, and ship, rather than just trying to iterate on launches as quickly as possib
60.
by maccam94 5y ago
As of the Starship presentation last week, current production is 5 Raptor 2's per week and they are ramping up to 1/day. Starship is important for Starlink to finish its full-scale deployment cost-effectively, but if they deploy s

More ›