raptop changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
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<B787_300>
on deep space human misisons is the main radiation concern GCRs or SEPs?
<bofh>
SEPs?
<B787_300>
s/SEPs/SPEs
<galois>
B787_300 meant to say: on deep space human misisons is the main radiation concern GCRs or SPEs?
<B787_300>
Solar Particle Events
<bofh>
I think it's primarily solar wind, yeah.
<B787_300>
but arent GCRs harder to stop?
<B787_300>
so if you are protected from GCRs shouldnt you also be protected from SPEs
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<bofh>
I mean yes, but GCRs are comparatively rare
<bofh>
I'm considering the unshielded/lightly shielded case
<bofh>
Shielding is hard and expensive in space, where every bit of mass counts
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<UmbralRaptop>
Oh, good. Eduroam works. (I just forgot to update my password)
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<_whitenotifier-3d18>
[Principia] rbarraud forked the repository - https://git.io/fx33l
<B787_300>
bofh: i mean it is until prices come down with reusable launchers
* B787_300
pours another glass of the kool-aid
<bofh>
B787_300: I mean at that point you're just going to have to repeatedly launch things out into far-earth orbit and then cobble it together there
<B787_300>
bofh: yeah. but you can also fit a lot of shit in a 7 or 9 m fairing
<B787_300>
and even if you have to take up 1 m of space for shelding (apparently Polyethelene is a good shielder) you still get a lot of space inside to habability
<B787_300>
i mean in NG they have a 7m fairing OD, ID for usable space is probably ~6.5m Dia. If you take a circular section up and need 1 m of shielding/structure on all sides that still gives 4.5 m of dia for human areas which is not quite two "floors" worth of space in the middle
<B787_300>
yeah you have to dock the stuff together in orbit but we have done that quite successfully on the ISS
<B787_300>
ah the PUIG says 6.3 m for ID in the fairing
<B787_300>
so that means ~4 m dia for the Human space inside... but that space can be up to 7.2 m long (but might have to be shorter because of the PAF CG requirements)
<B787_300>
and the numbers would be even better if SpaceX would actually make a true second stage for SuperHeavy/BFR/whatever we are calling the rocket now...
<B787_300>
look i just want a rotating space station bofh... and doing that in LEO is a bit ridiculous
<_whitenotifier-3d18>
[Principia] pleroy commented on issue #2056: Crash when craft breaks in atmosphere with explosions in KSP 1.3.1 with RP-1 (Erdos) - https://git.io/fjJuQ
<_whitenotifier-3d18>
[Principia] pleroy closed issue #2056: Crash when craft breaks in atmosphere with explosions in KSP 1.3.1 with RP-1 (Erdos) - https://git.io/fh3qx
<_whitenotifier-3d18>
[Principia] pleroy edited a comment on issue #2056: Crash when craft breaks in atmosphere with explosions in KSP 1.3.1 with RP-1 (Erdos) - https://git.io/fjJuQ
* B787_300
adds it to the list of places to go and see next time he is in Europe
<egg|cell|egg>
UmbralRaptor: also my tram just got controlled, it does occasionally happen
<bofh>
ooh, those look tasty *_*
<B787_300>
egg|cell|egg: the Raptor is not in here
<egg|cell|egg>
I know, he is not in eduroam range
<egg|cell|egg>
But there are the logs
<bofh>
egg|cell|egg: still far less common than the Paris trams, I swear I must have a weirdly biased sample but a full *half* of the times I took the T3a there were fare pigs
<bofh>
(I also took the T3b once and the T6 once, no fare pigs on either, but that's too tiny of a sample to draw reasonable conclusions from)
<B787_300>
fare pigs?
<bofh>
B787_300: ticket control
<egg|cell|egg>
pigs?
<bofh>
derisive nickname for cops
<bofh>
:p
<egg|cell|egg>
Is this because of the year of the of
<B787_300>
oh controlled as in a conductor checked all tickets?
<egg|cell|egg>
s/of/pig
<galois>
egg|cell|egg meant to say: Is this because pig the year of the of
<egg|cell|egg>
Yes galois
<bofh>
B787_300: it's never the conductor in FR, it's dedicated people in the car with portable scanners
<bofh>
they also often inhabit the métro at interchange points, Châtelet is infamous for them
<B787_300>
i never road the paris metro
<bofh>
(i've seen them *once* on exit at Cité, that was... weird)
<egg|cell|egg>
Same in CH
<B787_300>
actaully never mind i did ride the paris metro
<egg|cell|egg>
Controllers board the tram, check everyone on board
<bofh>
B787_300: Châtelet is the gigantic maze that links like 5 lines (and 3 lines of the suburban train network via a short extension) like directly in the center of the city
<B787_300>
needed to get from the station by the thatre that inspired Phantom of the Opera (we had a tour in a perfumery near there) to the musee des arts et metiers
<bofh>
that's easy lol, the 3 goes direct from Opéra to Arts et Métiers (tho I'd get off at Reaumur-Sebastopol, one stop before, since it's slightly closer to the musée).
<bofh>
(Also that reminds me, I still need to drop by the underground water reservoir under the Garnier)
<bofh>
(Haven't found a way in yet)
<B787_300>
yeah although i looked like a fool / normal american tourist because after leaving the station i asked a cafe worker where the musee wasand it was right across the street
<bofh>
(Too many bloody security cameras everywhere in that area to make nighttime scouting reasonable and there's an access fee in the day now).
<B787_300>
next time i am in Europe i am just going to pay the 10 bucks a day to be able to use my phone
<bofh>
B787_300: look I've had two phones stolen in that city b/c of my own stupidity / spaciness; pretty sure that's still better than me, :p
<B787_300>
managed to get through my entire EU trip without getting anything stolen
<bofh>
like leaving your phone plugged into a bus stop for charging, then wandering around the street corner for 5 minutes leaving it out of sight, at a stop directly under the tour eiffel, is honestly about as daft as it gets.
<bofh>
(I thought I'd be okay b/c empty street and it was 2AM at the time, plus that wasn't exactly a good day for other reasons, but meh).
<B787_300>
i thoguht the Eiffel was a bit underwhelming... granted we just walked around the base and didnt go up
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<bofh>
why would you do that rofl
<bofh>
like if you don't go up there's literally no point
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<bofh>
granted some of that was due to me going there in the late evening, the first day it reopened after a few days of worker strikes
<bofh>
so the place was utterly clogged with tourists and street sellers trying to get you to buy their overpriced crap
<B787_300>
because Contiki tour didnt give us the option to and there wasnt enough time to od it during the "free times" because i wanted to go to the musee des arts et metiers
<bofh>
and for some batshit insane reason several of them tried doing the "point flashlight at tourist to get their attention thing" EXCEPT WITH GREEN LASER POINTERS
<B787_300>
and because street sellers i assume they were cheap chinese lasers which means the power rating on the case is a lie
<bofh>
i distinctly recall just as i was going down the tower that this was literally my least-favourite moment in my entire FR trip to date at that point, lol (then like 2 hours later, theft).
<bofh>
yeah, I'm almost certain of it.
<bofh>
I'm tempted to go by there again with a webcam lacking an IR filter and record some video and then see just how bad it is
<bofh>
but I'm almost certain one day someone is going to blind someone with one of those
<B787_300>
i have a coworker who bought a "5mW" 532 from china... it can light matches and we had a person with an optics bench (and equipment) measure the power and it was WAY off
<bofh>
yeah, $5 says the KTP crystal is mismatched/misaligned *and* there's no IR filter whatsoever, so it's just leaking IR everywhere
<B787_300>
so yeah i would be pissed if a street seller was shining an unknown laser anywhere NEAR my eyes
<bofh>
the conversion efficiency of KTP is something like 20% in the absolute best case (and you're not going to fit perfect-quality KTP into consumer-grade laser pointers, those get the ones full of defects that have quantum efficiencies of like 5% or so, with high variability), so the IR LED is always much more powerful than the rated output
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<bofh>
I got one swept across my face at one point, I was seeing an afterimage in one of my eyes for the next hour
<B787_300>
like i dont understand why the tourist places allow the street sellers
<bofh>
I think that's around the point at which I asked egg|cell|egg how one says "don't shine that fucking thing in my goddamned eye" in French, "swears optional but preferred".
* UmbralRaptop
accidentally got radiation burns from planetenweg
<bofh>
B787_300: ehh, as much as I find them annoying, I see no reason to disallow them as long as they aren't doing things that are an egregious health and eyesight hazard.
<B787_300>
bofh: we were on the Esplanade de Trocadero and the sellers had freaking BLANKETS out with merch taking up a large amount of space
<B787_300>
UmbralRaptop: from what?
<UmbralRaptop>
B787_300: 1e-9 scale model of the solar system outside of Zürich
<B787_300>
how many feet/meters does that make an AU
<bofh>
B787_300: I lived in Paris for several months, I know :p It's not just at the Trocadéro, too.
<UmbralRaptop>
(so it's ~ 6 km from sun to nominal pluto)
<B787_300>
bofh: i was in Paris for a grand total of like 36 hours
<UmbralRaptop>
1 au would be ~150 m
<B787_300>
we got in at like 8 PM, did stuff the next day (like visit the perfumery, i visted the arts et metiers, then took care of my sis who got a bit sick that evening, and flew out of CDG at like 11 the next day
<B787_300>
UmbralRaptop: but they did have pluto?
<B787_300>
s/evening/evening)
<galois>
B787_300 meant to say: we got in at like 8 PM, did stuff the next day (like visit the perfumery, i visted the arts et metiers, then took care of my sis who got a bit sick that evening), and flew out of CDG at like 11 the next day
<UmbralRaptop>
B787_300: they had both ♇ and ⚳
<UmbralRaptop>
(Pluto and Ceres)
<bofh>
B787_300: that's nowhere *near* enough time to do anything, imho (but fwiw you did a good job given the constraints).
<B787_300>
i am impressed that they had ⚳ but if they had that why not also have ⚶
<egg|cell|egg>
Bofh: we missed Ceres last time
<bofh>
egg|cell|egg: yeah we did
<egg|cell|egg>
It was near a spring
<bofh>
OHH THAT'S WHERE IT WAS
<bofh>
look I was too busy poking cattle fence,
<bofh>
(okay that was out by Herschel)
<B787_300>
bofh: it was a gift from parents for getting my MSAE and a set tour... next time i am planning my own trip (hence why my sheet of things to visit)
<UmbralRaptop>
B787_300: well, Ceres is already a ~1 mm diameter speck…
<B787_300>
then vesta would have been a .5 mm speck
<bofh>
B787_300: if you want additions to there, feel free to poke egg|cell|egg or myself
<B787_300>
this nominal thrip wont happen flor like a year or so
<B787_300>
but i will
<B787_300>
like i already have Duxford in the UK to visit the aero museum there, actually using the chunnel, minatureworld in germany, German museum of Technology, London Science Museum
<B787_300>
and i want to visit Switzerland again just because it is so damn beautiful
<B787_300>
bofh: doesnt Paris have a decent aerospace museum with a Ariane 5 outside?
<_whitenotifier-3d18>
[Principia] eggrobin labeled pull request #2104: Restructure the rendering of the flight plan - https://git.io/fjJc8
<B787_300>
right now the super early plan for my trip is fly into London see stuff there then take the chunnel to Paris and on and end by flying out of germany (hopefully Munich if i can find decent tickets on Lufthansa)
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<bofh>
B787_300: if you're referring to the one at Aéroport Le Bourget, it's a model (still pretty large, tho).
<galois>
[WIKIPEDIA] Musée de l’air et de l’espace | "The Musée de l'air et de l'espace, (English: Air and Space Museum), is a French aerospace museum, located at the south-eastern edge of Le Bourget Airport, north of Paris, and in the commune of Le Bourget. It was inaugurated in 1919 after a proposal by the celebrated aeronautics engineer Albert Caquot..."
<bofh>
egg|cell|egg: I forget, have you ever been there or do I need to drag you there someday? :p
<egg|cell|egg>
Hmmm not sure
<B787_300>
added to my list of places to visit
<B787_300>
like I said yall feel free to add places
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<kmath>
<purpleeatary> Hey nerds! ⏎ ⏎ Have too many Prognova boxes that you just get annoyed at for cluttering up your pile of pills? ⏎ ⏎ They f… https://t.co/P4rHPHIUjD
<bofh>
!u 𝔚𝔬𝔩𝔣𝔤𝔞𝔫𝔤
<galois>
Whoa now, that's too many characters, hoss
<bofh>
!u 𝔚𝔬𝔩𝔣𝔤𝔞
<galois>
Whoa now, that's too many characters, hoss
<bofh>
!u 𝔚𝔬𝔩𝔣
<galois>
𝔚: U+1d51a MATHEMATICAL FRAKTUR CAPITAL W
<kmath>
<_juliannemarie> Google: Bach Doodle! Happy Birthday! 😄 ⏎ ⏎ don't say it ⏎ don't say it ⏎ don't say it ⏎ don't say it ⏎ don't say it ⏎ don't say… https://t.co/BVN1vA4uz8