msds

17 ms·

91.
by msds 9y ago
E-beam litho is...uh...not cheap. The system in the shared fab I use (WNF) costs around $450/hr with various discounts applied. Also, you're not going to get much done in just an hour. Now, maskless laser lithography is reasonably
92.
by msds 9y ago
I'd rather not, sorry!
93.
by msds 9y ago
I did the same thing, and ended up working for an early-stage biotech company doing some combination of hardware design, signal processing, machine learning, and experiment design. For better or worse, people generally seem to think a math
94.
by msds 9y ago
Does anyone else here melt their own glass formulations? I've written a little software package that implements all of the common math for calculating recipes and estimating properties. I'd love another developer on it, because ri
95.
by msds 9y ago
Presumably, an ensemble of nuclear theorists, particularly those dedicating their lives to making big LQCD calculations, would avoid inverting large ill-conditioned matrices, if that was a clever thing to do. I know a few QFT types - they t
96.
by msds 9y ago
How does one go about doing this? I have access to some obscure technical books that really should be scanned and archived, but don't know anything about the field...
97.
by msds 9y ago
Uh, up to notation, a group better have such an element - otherwise it isn't a group!
98.
by msds 9y ago
And with RF, well, things get really weird really fast...
99.
by msds 9y ago
It would shock me if any significant advances in cryptography weren't progress in pure math.
100.
by msds 9y ago
What do you mean, not much intuition for Fourier transforms? Sure, sometimes you get weird results and need to work with fairly generalized versions of functions, and a bit of background in functional analysis is helpful, but a strong intui
101.
by msds 10y ago
Unfortunately, the lack of documentation thing strikes again... It was pretty simple electronically - an ATTiny25, a coin cell, and an LED wired across two IO pins, for light sensing using LED's junction capacitance as a photocurrent i
102.
by msds 10y ago
I tried to do this exact thing years ago too! Except I only used one RGB led, and thus could never sense the red channel, because the bandgap of green and blue LED dies is too big to really get any signal from red light. Isn't it annoy
103.
by msds 10y ago
The paper describing the camera is very interesting - https://www.ncbi.nlm.nih.gov/pubmed/25471883
104.
by msds 10y ago
The real line is defined, as Lebesgue measure spits out the extended reals.
105.
by msds 10y ago
I was just considering this - is the topology on sexually explicit nouns the discrete topology, or indiscrete?
106.
by msds 10y ago
Early Ford was pretty direct about the value of "fitting the company culture", what with ceremonies like this: https://www.thehenryford.org/collections-and-research/digita...
107.
by msds 11y ago
None of the standard vendors we use actually ship the MSDS, but most do supply it online. I'm not in that business, but I do deal with various safety concerns quite a bit. When faced with basic tools, the average person tends to have a
108.
by msds 11y ago
Flashforge creator pros and ultimakers.
109.
by msds 11y ago
We just finished an independent survey of 5 consumer level machines with a bunch of different materials, looking at both 10-500nm particulate and HCN emissions. Essentially, even with ABS, if you're in a decently well ventilated area,
110.
by msds 11y ago
For decently capable(1) desktop manufacturing,"desktop" is a bit of a misnomer at this point. I've found that you need at least three desks, not to mention another desk for all of the test gear, and another for mechanical pro
111.
by msds 11y ago
I suppose that HitchBOT has played out half of the anti-hitchhiking narrative - hitchhiker as victim. Time to build a second robot?
112.
by msds 11y ago
Erm, it's the second result when I google 'dag'.
113.
by msds 11y ago
The sign in a photo near the end of the article ("Tie Downs") suggests it can be quite cheap - $7.00 / night.
114.
by msds 12y ago
Can't find any particularly good sources, but the comment section of [1] has good information on the route (essentially, winding around "Mescalito", a classic aid route) and well-informed speculation on the gear. Essentially
115.
by msds 12y ago
If you diagonalize the matrix in the problem, the formula pops out pretty quickly.
116.
by msds 12y ago
No, it's rapidly moving into toy hardware platforms targeted at web developers.
117.
by msds 12y ago
I've found the best machining resource is working with a good machinist. Quite a bit of machining is about intuition and properly evaluating other sensory inputs - knowing how to interpret the sound a cutting tool makes is critical! Un
118.
by msds 12y ago
Tragically, it would - and in the non-hypothetical world, probably does. There is a fair amount of research showing significant cognitive development improvements when replacing dirt floors with concrete ones. http://web.stanford
119.
by msds 12y ago
I think the name "HHO" itself hints that some amount of bullshit is taking place - the electrolysis units are obviously burning a 2:1 mixture of H2 and O2, not some weird mixture of atomic hydrogen and oxygen or impossible isomer
120.
by msds 12y ago
Laser, electron-beam and atomic-hydrogen (no, not crackpot-conspiracy-theory "HHO" atomic hydrogen) welding can work with tungsten, in theory...

More ›