deranger @ deranger @sh.itjust.works

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Joined

2 yr. ago

Alexander the Ok - 101k subscribers, does some great hour long engineering / computer science videos. F-14 central air data computer (first microprocessor), Minuteman missile (led to the first desktop computers), B-29 turret system (networked mechanical computers), and Buran (not really computers, but a really good video anyways).

Seeming useless math can be applied if you look for opportunities.

When I attended military training for sergeant rank, there was a land navigation part. Plot the grid coordinates on a map, use a protractor to figure out the angles, which you then aim the compass towards and count paces to find the points out in the woods. I realized these made triangles and said fuck a protractor. I used trigonometry instead. Figured out the lengths of the sides of the triangles from the grid coordinates, then used those lengths and tangent to figure out the compass angle and distance. The instructors had no clue what I was doing. Took first place in that course because the other person I was tied with only found 3 out of 4 points in his two tries at landnav.

The best math skill for everyday life has to be dimensional analysis, though. Want to figure out how expensive it is to drive per hour? Well, you've got miles/hour, dollars/gallon, and miles/gallon. This can get you to dollars/hour by just canceling out the units. (I don't have a paper to write things down but I think this is correct)

dollars/gallon X gallons/mile X miles/hour = dollars/hour

You can use dimensional analysis to convert all sorts of things. It's awesome.

Yeah I know it's the shitpost community but math is pretty cool.

Did you want to add anything to the discussion or just make a snarky comment? I looked through the paper linked in the article and didn’t see a capacity listed.

Our approach directs an alternative Li2S deposition pathway to the commonly reported lateral growth and 3D thickening growth mode, ameliorating the electrode passivation. Therefore, a Li–S cell capable of charging/discharging at 5C (12 min) while maintaining excellent cycling stability (82% capacity retention) for 1000 cycles is demonstrated. Even under high S loading (8.3 mg cm–2) and low electrolyte/sulfur ratio (3.8 mL mg–1), the sulfur cathode still delivers a high areal capacity of >7 mAh cm–2 for 80 cycles.

A 5C charging rate is great, but it’s pretty useless if the battery is too small to be practical.

Gotta put my chemistry education to good use somehow, certainly not using it in the IT career I ended up getting in.

This says physician owned, not physician managed. To me that sounds more like a co-op.

To be fair, there is some potential conflict of interest with self-referrals; the American Hospital Association has some criticisms, but I’m also wondering if this is a bit of their own propaganda. The American Academy of Orthopedic Surgeons says “physician-owned hospitals (POHs) are known for providing some of the highest quality care in the country at the lowest cost”, and the American Medical Association also supports POHs.

Marshall has also supported physician-owned hospitals

Weird thing to include as if this is bad. Would you prefer venture capital to own the hospitals?

The premise of the test is to determine if machines can think. The opening line of Turing's paper is:

I propose to consider the question, 'Can machines think?'

I believe the Chinese room argument demonstrates that the Turing test is not valid for determining if a machine has intelligence. The human in the Chinese room experiment is not thinking to generate their replies, they're just following instructions - just like the computer. There is no comprehension of what's being said.

The Chinese room experiment only demonstrates how the Turing test isn’t valid. It’s got nothing to do with LLMs.

I would be curious about that significant body of research though, if you’ve got a link to some papers.

I think the Chinese room argument published in 1980 gives a pretty convincing reason why the Turing test doesn't demonstrate intelligence.

The thought experiment starts by placing a computer that can perfectly converse in Chinese in one room, and a human that only knows English in another, with a door separating them. Chinese characters are written and placed on a piece of paper underneath the door, and the computer can reply fluently, slipping the reply underneath the door. The human is then given English instructions which replicate the instructions and function of the computer program to converse in Chinese. The human follows the instructions and the two rooms can perfectly communicate in Chinese, but the human still does not actually understand the characters, merely following instructions to converse. Searle states that both the computer and human are doing identical tasks, following instructions without truly understanding or "thinking".

Searle asserts that there is no essential difference between the roles of the computer and the human in the experiment. Each simply follows a program, step-by-step, producing behavior that makes them appear to understand. However, the human would not be able to understand the conversation. Therefore, he argues, it follows that the computer would not be able to understand the conversation either.

It’s the difference in electronegativity that makes the battery. That’s why you see lithium and oxygen a lot; lithium doesn’t want electrons, oxygen does want them. Sodium and potassium are very close in electronegativity so the salty banana battery wouldn’t be good.

I’m waiting for the cesium / fluorine battery, should theoretically be awesome. Or extremely explosive

That’s because lithium is in the most electropositive group of elements and sodium/potassium are too reactive for current technology. Theoretically I think Na and K based batteries should perform better as they’re even more electropositive than Li.

(Forgive the spelling error in the picture but it was the simplest one I could find quickly)

It only affects the Department of Education.

“Fully charged in 12 minutes” is meaningless without a capacity.

Polymerized cellulose is by definition a biobased polymer, this isn't anything new. The study doesn't make any claims that polymerized cellulose is harmful. Calling them "plant fibers" is incorrect as they aren't derived directly from a plant, like say, cotton. These are manufactured using cellulose.

This is not silly; the study is not to determine if these are harmful or not, just what's released from boiling a teabag.

I'm not knowledgeable in this area of research nor am I about to spend an hour going over the paper to write this comment, but collecting data on seemingly mundane things is important too.

2 minutes later, I set my time machine to go 1 minute back in time, collect the coin from myself, bring it to the present. Now I have 2 gold coins.

I don’t follow. If you took the coin from the past, it no longer exists in the present. You still have 1 coin. You are duplicated, however, and now two of you exist in the present timeline. You could do the duplication glitch by taking the present timeline coin back to the past and giving it to past self, who now has two coins.

Airplanes constantly turn over the cabin air 10-15x per hour with bleed air from the engines. This then heads out the outflow valves to the exterior of the airplane.

The recirculating fans have HEPA filters on them, but the majority of air is fresh.

Even with no peanuts on board, there still can be contamination of the other foods served on board, not to mention residue from previous passengers snacks.

https://www.bbc.com/news/articles/c2dpkpjjnw2o

Free parking rule is complete ass and makes the game take ages. People going bankrupt faster is a positive.

Didn’t realize users changed, my bad.