After my first laparoscopic abdominal surgery, the only pain was from the single longer incision that they pulled stuff out of. After my second laparoscopic abdominal surgery, the only pain was the CO2 shoulder pain. After my third laparoscopic abdominal surgery, there was no pain at all. Weird how even the same body can have such different repeat results.

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Emergency Chicken Stockpile is the name of my They Might Be Giants cover band.

A nerve cell is following similar gradients of chemicals. Where do we draw the line for intelligence? The OP question was about intelligence not using neurons. Is problem solving intelligence? Is maze solving a chemistry trick given life itself is a chemistry trick?

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Hilariously, she's the plant safety manager, and knowing her, I assume she wore whatever PPE is required by the SDS and annoyed everyone by making them to do the same. ;p

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BLUF: If manufacturer's instructions or chemical SDS, regarding a chemical, are not followed, it's likely an OSHA finding.

Edit: Most people throw away instruction books (or ignore them) and manufacturer's instructions and the books that come to the consumer are generally required to be followed or they have to pay for an IH technician/certified IH to come in and verify there isn't an overexposure. If you follow those, without a survey, it is very unlikely to be an issue (because they are generally extremely conservative).

That said, In my time doing IH surveys, I didn't actually survey one of those specifically, but based on the description above, if there's a smell that bad, it's likely a high VOC exposure and depending on the VOC can be regulated. At a minimum, it's a nuisance exposure and may not be regulated but OSHA would likely still recommend control or depending on the actual chemical, it could even be something as bad an expanded standard chemical.

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Only 10,000,000%?

10,000,000% this. Resin printers are just concerning to be around overall. Even with proper protocols, gloves, respirator, ventilation, spill protection, etc..., the hazards are fairly "industrial" and should be treated as such. It only takes one accident.

FDM is the way to go for unenclosed or close-by environments. Powder bed is the way to go if you can afford it and have a workshop. I leave resin to the industrial print facilities or actual full production shops that have separate spaces.

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You are confusing carbon fiber with carbon nanotubes.

Carbon fiber is fiberglass with carbon instead of glass. It's the same thing, but stronger. But it's still encased in a plastic binder, still micro or macro in size (not nano-scale).

Carbon nanotubes are pure carbon (sometimes with some oxides in there at low concentrations).

Their behavior and impact on the chemistry of the concrete are entirely different.

> we just use bulk fiberglass to accomplish the exact same thing...basically identical performance

Absolutely false, but these sorts of attitudes are exactly why things take so long to propagate in construction.

Adding fiberglass fibers of any size to concrete will make only a fraction of the difference to tensile strength compared to the carbon nano tubes. With CNTs we're talking increases of something like 40% to the Young's Modulus which is significant.

The nano scale also improves the concrete's ductility. Fiberglass fibers have no effect on shrinkage, either. Fiberglass does not serve as a nucleation point for cement hydration products. The list goes on.

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You're right. The positive or negative sign in that expression is just a bookkeeping convention and doesn't really have any further consequences. In some sense, it's a one-dimensional problem (the "heat dimension"). An EM analog might be nodal current analysis. For the purposes of analyzing nodal currents, it doesn't actually matter if you say that the sum of all the currents is zero, or if you say that the sum of currents flowing in, minus the sum of currents flowing out, is zero (and call all of the currents positive). In either case, you're preserving the information about whether something is going in or going out, just with a different system of bookkeeping -- are the negative signs attached to each current individually, or a group of currents that you identify and sum?

Once you start involving multiple spatial dimensions, as is common in EM problems, of course your choice of sign convention has more implications downstream.

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>ware that is an OSHA reportable hazard. No further threatening required. If they fix it, great. If they get air sampling done (usually costs more than the actual basic

what about FDM printer using ASA filament? Is that comparably dangerous? I was wondering in my job, they told me not to worry about it but I still am.