UmbralRaptor 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> … one of the other grad students just compared me to nomal O_o | <ferram4> I shall beat my problems to death with an engineer.
<whitequark>
I'm sure there is some number of GPa and K that makes it a semiconductor
<Ellied>
and you know how these things get named, just because it's called a scandium diode doesn't mean it's *primarily* that. Could just be scandium-doped something else.
<Ellied>
also I just got a broken laptop that I don't think I can fix :(
<Ellied>
it doesn't POST, so I suspect the RAM may be bad, and the idiot manufacturers soldered it straight to the motherboard.
<xShadowx>
what chemical (preferably not too hazardous) can be used to disolve lead? or..better way to go about it? basicly i want to figure out if this thing i bought has lead in it
* xShadowx
hates chem class was full when he was in school
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<xShadowx>
ohhh lead tests for jewelery :D
* xShadowx
starts googling
<Ellied>
best way I know of would be to stick it in front of an x-ray fluorimeter, but those aren't exactly commonly available
Majiir is now known as Snoozee
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<Qboid>
1d 12h 0m 0s left to event #1: Falcon 9 • SpaceX CRS 12 [at 2017-08-13 18:57:00]. Say '!kountdown 1' for details
<Qboid>
egg|cell|egg: Description: A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System.
<Qboid>
egg|cell|egg: Description: A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System.
<egg|cell|egg>
!Wpn Fiora
* Qboid
gives Fiora a proactinium bolo
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<Qboid>
egg|zzz|egg: Description: A SpaceX Falcon 9 rocket will launch the 14th Dragon spacecraft on the 12th operational cargo delivery mission to the International Space Station.
<egg|zzz|egg>
!kd -edit:1 time:2017-08-17T16:31Z
<Qboid>
egg|zzz|egg: Updated event #1: Falcon 9 • SpaceX CRS 12 - A SpaceX Falcon 9 rocket will launch the 14th Dragon spacecraft on the 12th operational cargo delivery mission to the International Space Station. - 2017-08-13 18:57:00
* NomalRaptor
agrees.
<egg|zzz|egg>
!kd -edit:0 name:「みちびき3号機」／H-IIA
<Qboid>
egg|zzz|egg: Updated event #0: H-2A • Michibiki 3 - A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System. - 2017-08-12 04:40:00
<egg|zzz|egg>
!kd -edit:1 time 2017-08-17T16:31Z
<Qboid>
egg|zzz|egg: Updated event #1: Falcon 9 • SpaceX CRS 12 - A SpaceX Falcon 9 rocket will launch the 14th Dragon spacecraft on the 12th operational cargo delivery mission to the International Space Station. - 2017-08-17 16:31:00
<Qboid>
7d 0h 0m 0s left to event #2: Atlas 5 • TDRS M [at 2017-08-18 14:04:00]. Say '!kountdown 2' for details
<egg|zzz|egg>
!kd -edit:0 name 「みちびき3号機」／H-IIA
<Qboid>
egg|zzz|egg: Updated event #0: 「みちびき3号機」／H-IIA - A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System. - 2017-08-12 04:40:00
<Qboid>
egg|zzz|egg: Updated event #0: 「みちびき3号機」／H-IIA - A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System. - 2017-08-12 04:40:00
<egg|zzz|egg>
!kd -edit:0 name 「みちびき3号機」／H-IIAロケット35号機
<Qboid>
egg|zzz|egg: Updated event #0: 「みちびき3号機」／H-IIAロケット35号機 - A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System. - 2017-08-12 04:40:00
<egg|zzz|egg>
!kd -edit:0 description A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System. https://youtu.be/-bgZYjnN9gQ
<Qboid>
egg|zzz|egg: Updated event #0: 「みちびき3号機」／H-IIAロケット35号機 - A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System. https://youtu.be/-bgZYjnN9gQ - 2017-08-12 04:40:00
<egg|zzz|egg>
NomalRaptor: there's also a протон coming up apparently
<egg|zzz|egg>
!help kd
<Qboid>
kd: Prints out the details for Kountdown Events
<Qboid>
parameters: -add (Add Kountdown event. Syntax: !kountdown -add name|description|time.), -list (List pending Kountdown Events or subscribers), -remove (Delete Kountdown by id.), -edit (Edits a Kountdown by id.), -subscribe (Subscribe yourself or a channel to Kountdown.), -unsubscribe (Unsubscribes yourself or a channel from the Kountdown.)
<Qboid>
egg|zzz|egg: Description: NROL-42 is a classified spacecraft payload for the National Reconnaissance Office launching via an Atlas V 541
<egg|zzz|egg>
!kd 5
<Qboid>
egg|zzz|egg: Invalid ID!
<egg|zzz|egg>
wait what
<egg|zzz|egg>
!help kd
<Qboid>
kd: Prints out the details for Kountdown Events
<Qboid>
parameters: -add (Add Kountdown event. Syntax: !kountdown -add name|description|time.), -list (List pending Kountdown Events or subscribers), -remove (Delete Kountdown by id.), -edit (Edits a Kountdown by id.), -subscribe (Subscribe yourself or a channel to Kountdown.), -unsubscribe (Unsubscribes yourself or a channel from the Kountdown.)
<Qboid>
egg|zzz|egg: Description: A Протон-М with Бриз-М upper stage will launch the Экспресс-2000-based Благовест №11Л communications satellite into GEO (see http://space.skyrocket.de/doc_sdat/blagovest-1.htm).
<egg|zzz|egg>
!kountdown 5
<Qboid>
egg|zzz|egg: Invalid ID!
<egg|zzz|egg>
!kountdown 0
<Qboid>
egg|zzz|egg: Invalid ID!
<egg|zzz|egg>
uuuh
<egg|zzz|egg>
Thomas: what happened to the H-IIA kd?
<bofh>
SnoopJeDi: hey telecom estimates are fun :D
<bofh>
also I swear at this point NASA Voyager stuff is one of my main distractions when the world is on fire.
<bofh>
(there's no coincidence my largest tweetstorm on that topic was Jan 20th this year)
<egg>
bofh: what about numerics
<SnoopJeDi>
Phil Plait RTing out President Carter's letter soothed my soul
<bofh>
egg: that's another good one. speaking of which, now that my headache is finally gone and I can think again properly and I have free time, let me actually think about your Hamiltonians and symmetries now.
<kmath>
<BadAstronomer> This letter by President Carter is truly wonderful, and a ray of light in these times. https://t.co/KelQw8AglF
<bofh>
Thanks :D
<SnoopJeDi>
he and Zach Weinersmith also RT'd my BAHFest mention so I got to enjoy that "senpai noticed me" feel
<SnoopJeDi>
I think he's quite possibly the nicest scientist I've met
<bofh>
Heh. Kinda like how Richard Stephenson actually posted downlink subcarrier and symbol FFTs for an array reception of Voyager 2 when I asked him if he could.
<bofh>
Yeah, I should follow him. Done.
<SnoopJeDi>
nice Twitter is nice
<SnoopJeDi>
I much prefer it to other Twitter
<bofh>
Same. Oh god same.
<SnoopJeDi>
heh, today of all days
<egg>
speaking of the noticement of senpai, still no news from Atlas's human on those numerics questions =(
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<SnoopJeDi>
I may print and frame that letter, actually.
<SnoopJeDi>
the aesthetic is a bit plain but maybe that's the point?
<bofh>
LA1 is a count of low-energy solar wind particles encountered by the probe, averaged over 15 minutes there
<SnoopJeDi>
gorgeous data though
<bofh>
the massive drop corresponds to the termination shock crossing
<bofh>
from ~25 particle crossing events to ~3
<SnoopJeDi>
just looking at those two spikes brings back memories of that itshappening.gif time
<SnoopJeDi>
god, what a good thing we made
<bofh>
yeah holy fuck I'm amazed at how good shape those two probes are in
<bofh>
after 40 years most computers and scientific apparatuses here aren't in the greatest shape, and we chucked these at Jupiter
<SnoopJeDi>
I only recently learned the remaining lifespan of the RTGs and it made me more depressed than it should've
<SnoopJeDi>
but I also found a nice write-up of the history of instrument power-down which I found strangely soothing
<bofh>
So my bet is there are some more components that will still bring back good data if run colder than their design temps
<SnoopJeDi>
"it's sad that all things must end but hey at least science is being science about it"
<bofh>
Since a lot of electrical power does still go into heaters.
<SnoopJeDi>
yea, plenty left to do
<SnoopJeDi>
I bopped someone right on the internet-nose for suggesting there isn't science to be had in interstellar space
<SnoopJeDi>
"BAD!"
<bofh>
And like the UVS supplementary heater went off in 2015 but UVS itsself was still working in 2016 when they powered that down, despite being far *far* below its design temperature.
<bofh>
LOL. We have *literally no idea* what's out there. These probes are literally giving us our first hard data of that region of our galaxy.
<bofh>
Things like the weird magnetic reconnection at the termination shock, or weird particle ribbons that IBEX saw, etc etc etc
<SnoopJeDi>
yea I described the potential insight for things like hierarchical assembly, which is a topic of one of our local rockstars
<SnoopJeDi>
but yea I was borderline furious at even the possibility that someone could think "eh okay we crossed the heliopause, nothing left to see here"
<bofh>
Frustratingly there will be a point at which there *will be* enough power to run CCS/FDS/some instruments, but not enough power to run the Travelling-Wave Tube Amplifier.
<SnoopJeDi>
IT'S LITERALLY THE FIRST TIME WE CAN SEE THIS STUFF
<bofh>
Which is sort of a really really aggravating point to be at: "well we can do a science, just don't have enough power to xmit it back to Earth"
<bofh>
Yep.
<SnoopJeDi>
you're much more knowledgeable about the specifics than I am, heh
<bofh>
Like jesus fuck.
<SnoopJeDi>
I mean I'm giving this person an unfair sell here they conceded the point
<SnoopJeDi>
but for every one person who would concede it...
<bofh>
Yeah, a lot of people don't know any better.
<bofh>
Like the assumption of "interstellar space == empty void" is surprisingly common.
<bofh>
I kind of want to see NASA do a specific interstellar probe using Am-241 RTGs but lol like that'll get funded.
<bofh>
We can't even get an ice giant orbiter together.
<SnoopJeDi>
or an asteroid mission >:(
<SnoopJeDi>
but yea at least the ignorance comes from a good place in this case
<bofh>
@NASA_Dawn doesn't count? :P
<egg>
it does :-p
<SnoopJeDi>
you know what I meant :P
<egg>
1 Ceres best asteroid
<bofh>
Is it still the biggest we've discovered?
<egg>
bofh: does Pluto count :-p
<bofh>
egg: well Pluto's orbit is past Jupiter's, so no :P
<egg>
ah well it's not main-belt
<bofh>
I mean specifically main-belt ones. Pluto is indeed iirc the largest KBO
<SnoopJeDi>
bofh, one of the worst professional memories I have is excitedly explaining how JWST will occupy L2 to my parents' next-door neighbor, and was met with "why are we wasting money on this" or some-such
<bofh>
SnoopJeDi: ugh :/
<SnoopJeDi>
I don't even know how to begin to explain curiosity to someone
<bofh>
I wish I could slap intellectual curiosity into people or something.
<SnoopJeDi>
and it makes me so sad that it's so easy to lose it entirely
<SnoopJeDi>
which reminds me, I gotta get my niece something for my visit next month. Science Uncle is on the case
<egg>
bofh: with a large trout?
<bofh>
Heh.
<bofh>
egg: ofc. ofc.
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<SnoopJeDi>
perhaps a NonlocalRaptor, she likes dinos
<egg>
!wpn ferram4
* Qboid
gives ferram4 a superconducting Sagan-like paywall
<bofh>
The Trout Of Curiosity, not to be confused with The Salmon Of Doubt
<egg>
bofh: they go fin-in-fin
<SnoopJeDi>
curicodsity
<bofh>
I'm pretty sure Sagan would be offended at being turned into a paywall.
<ferram4>
I have no idea what that even means
<egg>
ferram4: well sometimes Qboid's output is a tad silly
<egg>
ferram4: btw, fyi, Qboid now has kountdown capability
<ferram4>
egg: I am currently attempting to solve the rather interesting problem of, "how do I find the maximum amount of relative mass flow that might go through a gas generator on an engine if I allow ludicrous amounts of chamber pressure"
<SnoopJeDi>
A bear is a bit of a strange juxtaposition with current events, but that's the nature of long-term projects I guess heh
<SnoopJeDi>
also something-something space marines
<bofh>
It could be either a reference to the constellation its in, the constellation it's going to be located in, or current political events.
<bofh>
Could be any of 'em.
<ferram4>
The method I've chosen is, "let's plug the numbers into the solver and see what the fuck happens" And so far it has told me, "limiting the bounds to 0% - 20% cannot find a root above 47 MPa. This is hilarious.
<kmath>
YouTube - [Song] Unreeeal SpaceMarine 3 (WE ARE THE SPACE MARINES!)
<SnoopJeDi>
and considering NRO's cheekiness the political match-up is apropos
<egg>
ferram4: hm, you should ask those chemistry-related questions here
<egg>
ferram4: also definitely ask materials science questions to bofh
<SnoopJeDi>
lol this is a silly mix
<bofh>
yea
<SnoopJeDi>
ta for the chuckles
<bofh>
tho it's possible that there aren't really materials that satisfy your constraints for ludicrous enough chamber pressures.
<egg>
bofh: ablative cooling?
<ferram4>
Well, we have real life examples up to 25 MPa. So that means that it's certainly possible.
<egg>
oh, pressure
<egg>
pressure seems annoying yes
<ferram4>
As for temperature: regen cooling + film cooling solves a multitude of temperature-related sins.
<egg>
ferram4: s/sol/absol/
<Qboid>
egg thinks ferram4 meant to say: As for temperature: regen cooling + film cooling absolves a multitude of temperature-related sins.
<bofh>
Yes, that it does.
<ferram4>
So far I am not concerned with materials. Not yet. Still handling the modelling of components and such.
<ferram4>
About to work out calculating efficiencies for pumps as a function of speed and vol flow rate rather than decalring, "it is 60% eff!" by fiat.
<egg>
bofh: context: ferram4 is working on a procedural engines mod for KSP/RO
<bofh>
egg: cool. let me guess, this is eventually going to turn into a CFD engine? :P
<bofh>
well, gas dynamics, which is a *bit* easier
<ferram4>
No, that would be out of scope.
<ferram4>
On the other hand, I have my answer to the fraction mass flow through a gas generator. It is also a horrifying result: http://i.imgur.com/6wWLnwu.png
<egg>
bofh: well, you know that ferram4 makes FAR right
<bofh>
egg: no, I actually did not
<SnoopJeDi>
FAR right >_>
<egg>
uh
<bofh>
also that^ (poor wording)
<egg>
no that is *not* what I meant
<egg>
bofh: so, backstory time: this channel exists thanks to ferram4 digging up papers for FAR
<bofh>
FAR?
<Qboid>
bofh: [FAR] => Ferram Aerospace Research
<bofh>
Ahh.
<ferram4>
Aero mod.
<egg>
bofh: see the /topicgist, first quote block
<bofh>
*nods*
<bofh>
WHY WOULD YOU DO HIGH AoA HYPERSONIC FLIGHT?!?
<bofh>
*egg burns JPL at the stake of reproducibility