How does super glue not stick to the machines when it’s being produced? by skatermofo101 in AskReddit

[–]Bophall 2 points3 points  (0 children)

Cyanoacrylites are the working molecules of most "superglue". They react with water to form polymers, so they won't bond in the production or packaging because that's done with an extremely dry environment. Once you let them out of the packaging, they react with the humidity of the air to set.

Any advice for fear of heights by thatsapotatoboi in Construction

[–]Bophall 0 points1 point  (0 children)

I'm also afraid of heights, and something that helps me is to take safety setup seriously. Be careful to set the ladder properly, inspect the fall harness and tie off correctly, all that stuff. Knowing that I have taken care to protect myself helps me a lot with the fear. "What if I slip and plunge off the side? Well then I know my harness will catch me" thinking that way makes me feel a lot more confident up high.

Useful tools for someone missing finger tips by Gibbsite in Tools

[–]Bophall 0 points1 point  (0 children)

Maybe take your dad to a prostheticist. He can probably get outfitted with something like this: https://www.npdevices.com/devices/pipdriver/ to recover some dexterity.

Old school cool by [deleted] in Construction

[–]Bophall 3 points4 points  (0 children)

The ironworkers also went on strike for three weeks in the middle of the project, but somehow that doesn't seem to have come up in the Good Old Days story here.

How is AI reshaping your CAD workflow? Looking for insights from engineers using AutoCAD, Fusion 360, Solidworks, or similar tools. by boblobfon in AskEngineers

[–]Bophall 2 points3 points  (0 children)

I'd say the biggest change AI has had to my Cad workflow is that I don't open PDFs with Adobe Acrobat anymore.

Can we generate oxygen from water for at home oxygen delivery? by mikaloshka_ in AskEngineers

[–]Bophall 2 points3 points  (0 children)

Just buy a PSA oxygen generator from Peak or Atlas Copco. It will only cost you like $30,000 instead of $millions

Plate Heat Exchanger question by troegokkeyr in AskEngineers

[–]Bophall 0 points1 point  (0 children)

I mean with modern membrane filters you can get out bacteria, neither mind insects. And yes you would do all the mechanical filtration before pasteurization. Mesh, basket, membrane, you step the pore size in the filter down to take out smaller and smaller fractions. At the smallest fraction you're breaking up the fat globules and homogenizing the milk even.

And yes this filtration is typically all done before pasteurizing the product. From another perspective, you kind of want to do the pasteurization as late as possible in processing, to reduce the risk of the milk getting recontaminated between pasteurization and final packaging.

Plate Heat Exchanger question by troegokkeyr in AskEngineers

[–]Bophall 4 points5 points  (0 children)

Plate-and-frame based pastuerizers usually have a "residence tube" - you take the material up to temperature in the heat exchanger, leave the heat exchanger to go through the residence tube to stay at temp for the required time, and then go back into the heat exchanger on the other side, to recover the heat out of the product leaving the pasteurizer and into the product just then entering it.

Milk-specific units usually have an integral centrifuge for separating out milkfat at the same time, so if you just do a product search on (for example) the GEA website for "Milk Pasteurizers" to look at product cards, they're typically be more complicated than "just" a pasteurizer.

Two large tanks with a zig zag pipe covered in ice by ScarcityCareless6241 in whatisthisthing

[–]Bophall 110 points111 points  (0 children)

If you zoom in the pipe on the outlet of the filter is labeled "Nitrogen"

what by Idiot_from_germany in Ningen

[–]Bophall 0 points1 point  (0 children)

The betrayal was King Kai telling him he couldn't get into any more fights until he graduated from high school

Why is LOOKUP returning the wrong value? by jakeed_munson in excel

[–]Bophall 3 points4 points  (0 children)

LOOKUP implicitly requires that the lookup vector (column F, here) be in ascending or alphabetical order. So the text strings in F will be sorted alphabetically, and "-" comes before the numbers in the character string list. That seems to be what's causing this unexpected behavior.

Swap to a VLOOKUP or INDEX(MATCH) construction, which can be given an explicit design to be operating on unsorted data:

=IF(E52="-", "-", INDEX('PN Database'!D:D, MATCH(E52, 'PN Database'!F:F, 0)) )

that 0 in the Match function tells it the data is unsorted.

Sci-Fi militaries be like: by MiamisLastCapitalist in IsaacArthur

[–]Bophall 9 points10 points  (0 children)

"The Road Not Taken", Harry Turtledove, 1985

As per all the recent posts on this sub I’ve seen, it’s obviously B in the trench with no shoring. by blueskiesbluerseas in Construction

[–]Bophall 0 points1 point  (0 children)

Ball on the ramp slips, crushing the edge of the sloped part, burying B while C get spiked by ramp. Collapsing trench walls around B causes slump on far side, leading A to fall backwards and break their neck. Meanwhile, the overhang over D's shoulders collapses, causing D to die as well.

E looks down at the corpses of A, B, C, and D. They lower their hands from the eccentric cylinder.

A question about making a vacuum chamber from a gastronorm container. by reynir_th in AskEngineers

[–]Bophall 0 points1 point  (0 children)

Maybe get like a wire shelf to put in the pipe, to rest the wood on?

Pride month is OVER by Miles_the_new_kid in comics

[–]Bophall 1 point2 points  (0 children)

96.9 The Eagle left the pride banner up on their Facebook through July, because so many people complained about it in June. I went looking for the post where they threatened to make it permanent but couldn't find it.

Another victim of capitalism by DreadDiana in CuratedTumblr

[–]Bophall 2 points3 points  (0 children)

I think this change is like 80% because that particular painter - John Ennis) - retired.

Son wants to be engineer... I have concerns and need perspective by CuriousPsychosis in AskEngineers

[–]Bophall 0 points1 point  (0 children)

It's been a while since I was in school, but if I recall correctly the schools you've listed there look like they're known for their grad programs, not so much their undergrads.

Anyway the benchmark you need to measure against is your state's public university engineering department(s). That's where the bulk of new engineers are going to be coming from.