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Ask HN: Teach me something new

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Re: Ask HN: Teach me something new

#181

Post by [deleted] »

golergka wrote: post #137
idrios wrote: post #119

In drug development, a lot of the engineering goes into making sure the pharmaceutical compound -- having been developed -- actually reaches the target area of the body. If the compound is a relatively large particle that needs to get into the blood stream, a nasal spray might result in the compound being deposited at the bottom of a person's lungs without ever getting absorbed. If stomach acids break the chemical do…

> a nasal spray might result in the compound being deposited at the bottom of a person's lungs without ever getting absorbed Is it also true for cocaine and other similarly ingested substances? Are coke users walking around with garbage in their lungs?

[deleted]

Re: Ask HN: Teach me something new

#182

Post by flobosg »

To determine the three-dimensional structure of proteins (such as the spike protein of SARS-CoV-2) one of the most used techniques is to grow protein crystals and blast X-rays at them. It has been estimated that these crystals have a cost per weight around 3000 times higher than diamonds.

Re: Ask HN: Teach me something new

#183

Post by mordechai9000 »

jasfi wrote: post #14

Nim ( https://nim-lang.org/ ) is a fast, compiled language that is as easy to use as Python. It doesn't have the same ecosystem or user-base of Python though, although Python and Nim can be bridged via nimpy.

I've been itching to pick up a new language, and Nim is high on the list of choices. But I'm leaning towards Rust, just because it has more recognition and a more evolved ecosystem.

Re: Ask HN: Teach me something new

#185

Post by exikyut »

mhh__ wrote: post #164
maddynator wrote: post #19

Earlier quoted context omitted.

Very interesting. whats the use case of this?

If it's proven then we can add a new pointless compiler optimization (some of them are already allowed to assume some things never terminate, even)

What's the most pointless compiler optimization you're aware of?

(Obviously a subjective question in practice, so chances are you might need to add a bit of qualification)

Re: Ask HN: Teach me something new

#186

Post by mdp2021 »

sillysaurusx wrote: post #94
tempestn wrote: post #87

Earlier quoted context omitted.

Your parent covers that under, (paraphrasing) 'if we are, everyone always is'.

That’s true. But isn’t that tautology? Either it’s the most important or unimportant.

> Either...

Logic of natural language does not work that way. It's paraconsistent: statements are attributed a value within

  T(A)^T(¬A), T(A)^F(¬A), F(A)^T(¬A), F(A)^F(¬A)
because we judge meanings, interpretations, multiple per expression.

Re: Ask HN: Teach me something new

#187

Post by tallytarik »

silisili wrote: post #63

I'm going to go a bit random...get a styptic pencil! Nobody I've met even knows what they are. I came across them years ago in the shaving section, and was blown away by their utility. They are solid pieces of some saltlike material that are super effective at stopping bleeding. We don't even have bandaids in our house anymore, the pencils are way more useful.

Roll-on antiperspirant is also great at stopping bleeding from shaving cuts.

(Spray antiperspirant might be, too, but spraying myself in the face has never sounded particularly appealing)

It’s not designed for this purpose, and you’re putting this substance on an open wound, so try at your own risk.

Re: Ask HN: Teach me something new

#188

Post by exikyut »

leephillips wrote: post #101

By far the most important martial arts skill is the ability to function effectively after receiving a powerful blow to the face, solar plexus, etc. The only way to develop this skill is by practicing it; very few people do, for obvious reasons. If your martial arts training does not include this, it may have many benefits, but is severely lacking as training for actual fighting.

I guess the two questions that come to mind after I read this are

1. How can I OW objectively OW tell oww the difference ow where being seriously jarred (ow) ends and being significantly injured begins?

2. As a person ages, is it possible to train in this way without ending up seriously banged up with long-term ramifications? Or is this more of a "don't use a skateboard" type of thing with no leeway?

Re: Ask HN: Teach me something new

#190

Post by modernerd »

schoen wrote: post #132

In the 1800s, scholars who knew a lot of languages (including, often, several modern and ancient European languages, and increasingly also Sanskrit) started to notice some amazing patterns about similarities in words among all of these languages, including languages from very far apart and that had no visible connection at all from the point of view of their present-day speakers. As these patterns were explored, they…

This language tree infographic seems to illustrate your points about the various branches well:

https://www.openculture.com/2015/06/the-tree-of-languages-il...

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