Viewing profile — VygmraMGVl

As an example of a negative result-- https://www.nature.com/articles/s41526-019-0071-6 Astronauts given two different batteries of cognitive tests showed no dose-response relations…

At one point there were over 70 different token maxing dashboards as the management had a game of whack a mole trying to remove them. There definitely was encouragement from manage…

The leaderboard wasn't leadership generated, it was engineer generated from internally available data. The leadership target is "impact" from ai tools.

Claude opus 4.6 scores 51.9% on the same benchmark. Microsoft's result is quite good.

Meta's interview process does include leetcode Hard and Medium problems (although the Hards tend to be on the easier side), but you don't actually have to write working code, just …

It's pretty easy to scrape your own calendar events in Meta. I'm not sure about others' as I'm not a manager, but I wouldn't be surprised if it were visible as long as someone is i…

Typically, the behavior of any given metal is a mix of mechanisms so the measured behavior is fit to a curve where you fit n. So for metals the exponent is typically a decimal betw…

SoundBio is a bio + chemistry makerspace in Seattle. Not BSL, though.

It would be interesting to see a blogpost on parameterizing a model in PyBaMM given a commercial cell. I imagine many battery engineers using simulation-based design tread over the…

The "batteries-included" models in PyBaMM would apply to sodium batteries and lead-acid batteries (i.e. either the full Doyle-Fuller-Newman model or the Single Particle simplificat…

This was true in 2013 as well. I've heard this has changed in the last 5 years or so, though.

Also probably a skin and lung irritant. Lots of people have contact allergies to macroscale silver and nanowires tend to get embedded in cells in soft tissue.

It can affect battery longevity. If you charge lithium ion at cold enough temperatures, you get lithium plating which rapidly degrades capacity and can lead to internal shorts and …

It's due to heat produced, gas generated from overvolting the battery, and stress gradients from different levels of charge across the battery.

There isn't any difference between the guano graphene and the non-guano graphene in terms of structure -- look at figures 1 and 2. Figure 2A is clearly 4 of the same spectra becaus…

Lithium is not a rare earth mineral. Typical weight fraction in ore is 0.5-8%.

10 years ago, Congress decided we needed to transition off of it. Large amounts of the stockpile were sold off from 2013-2018 and this is the final part of the plan. https://www.bl…

Heads up, the danger with charging LFP at low temperature is that you will begin lithium plating. While this is a driver of degradation of LFP batteries, it's also a safety risk as…

You drive current through the outer probes. The inner probes measure voltage and are not driven. When measuring non-zero resistance, you can vary the driving current to confirm the…

I know a dev fresh out of college who became proficient in COBOL, got a govt job offer, and now is working as a lifeguard because places that hire COBOL programmers take forever to…

You're in an enclosed tube with lots of people, so fire is a lot worse. Most lithium ion battery fires in cabins are from loose vape batteries, probably shorting on keys or change.…

NaCl isn't bonded in water, it's ionized and dissolved. Each ion (Na+ or Cl-) is surrounded by a large number of water molecules due to the electric field of the ion.

Yes, that would be a membrane. There a number of membranes with larger pores that are fabricated like above, but out of polycarbonate (track etch membranes). Some people have also …

You can declare a type-hint beforehand without setting the value of the variable. See: https://peps.python.org/pep-0526/#global-and-local-variable-...

The title says this is expanded PTFE, which seems like it wouldn't need an additional PFOTS coating. I doubt it would shed similar small molecules to a PFOTS coating as it's a diff…