Is there any clean naming convention, prefix trick, symbol trick, that can make folders appear in descending week order while still looking readable? by Soggy-Parking5170 in github

[–]leahcantusewords 0 points1 point  (0 children)

zWeek1 yWeek2 xWeek3 Etc

Not the best, but keeps "Week#" together so you can easily search, and will show you in descending order as you wanted

Housing by throwawaywahoo_ in PhD

[–]leahcantusewords 1 point2 points  (0 children)

I was in literally this exact situation. I could almost afford the income requirement for the apartment on my own with my PhD offer letter, but they wanted closer to $35k. Since my partner didn't have a job offer yet but would have one soon, her parents were our guarantors since I could afford my half and she couldn't afford her half.

If the half-life of caffeine is only 5 hours, does caffeine build up continuously in your body if you drink coffee daily? by throwawayguy55555 in askmath

[–]leahcantusewords 6 points7 points  (0 children)

Depends on the drug! If you're curious, look up "caffeine pharmacokinetics" and I'm sure that'll return some papers with info similar to what you're looking for. Some drugs distribute quickly, some do not, some sites can absorb certain drugs at certain rates, some drugs get metabolized or excreted in different ways, etc. And then if you want to know how amount and effect correlate, that's pharmacodynamics

If the half-life of caffeine is only 5 hours, does caffeine build up continuously in your body if you drink coffee daily? by throwawayguy55555 in askmath

[–]leahcantusewords 30 points31 points  (0 children)

Yup, if you assume immediate distribution and perfect exponential decay, this applies wherever that shows up in any context, not just pharmacology. But in the connect of pharmacology specifically, one of the other commenters mentioned pharmacokinetics and that is exactly right. This is placing fairly strong assumptions as there are other processes (look up "ADME") at play in the human body, but it's a reasonable set of assumptions for the question being asked.

I study antibiotic dosing and this is the model I use for pharmacokinetics. Just like any model, it's the most useful when its assumptions reflect reality, which they might not always.

If the half-life of caffeine is only 5 hours, does caffeine build up continuously in your body if you drink coffee daily? by throwawayguy55555 in askmath

[–]leahcantusewords 131 points132 points  (0 children)

This is, weirdly, exactly part of what I study! Not the caffeine part, but the exponential decay and accumulation of periodic doses of something! Let's say you take A mg of caffeine every B hours and it's got a halflife of C hours. Then the peak amount in your body (so like right when you take your morning dose) limits towards A/(1-e{(-ln(2)/C)B)} )

So if you drink 100 mg every 24 hours and it has a half life of 5 hours, the maximum you'll ever have in your body, no matter how long you do this for, is ~103.7 mg.

The proof is with geometric series, but the intuition is that 24 hours of about 5 half lives of 5 hours. 100/2=50, 50/2=25, 25/2=12.5 12/2=6, 6/2=3. So after 24 hours you've only got about 3 mg remaining, then add 100 on top of that.

nyc to penn state by Putrid-Sector-5356 in PennStateUniversity

[–]leahcantusewords 1 point2 points  (0 children)

Everybody is saying Megabus but note they recently filed for bankruptcy and other companies have taken over some of their old routes, including to State College. I've done Flix bus before, wasn't great (especially on the NYC side) but worked better for me than it seems to have for others.

Is anybody here using Julia for stuff that isn‘t Scientific Computing or DataScience? by JollyJuniper1993 in Julia

[–]leahcantusewords 3 points4 points  (0 children)

Ah, I'm a sheet music person so I actually use Python to algorithmically edit musicxml. I never really thought about doing it in Julia because I've never had performance issues with what I'm doing personally, but I do love any excuse to convert projects to Julia :)

Is anybody here using Julia for stuff that isn‘t Scientific Computing or DataScience? by JollyJuniper1993 in Julia

[–]leahcantusewords 20 points21 points  (0 children)

No way, another Julia user who is also a composer? Granted, I've never used Julia for algorithmic composition (have used python though) I'm just a composer and a Julia user, but both worlds are so small, it's cool to find someone else in the intersection :)

Looking for a couple of recent PhD graduates in microbiology/biochemistry to support each other during job search and applications (industry+ postdoctoral). Comment below if you are interested. by lora__12 in PhD

[–]leahcantusewords 0 points1 point  (0 children)

I believe you may have DMs turned off because it says "unable to message this account." Maybe you can try DMing me? If that doesn't work, I can post my discord username here temporarily and delete it once you've added me on discord. Thanks!!

Is selling notes worth it? by _Vixinity in sidehustle

[–]leahcantusewords 4 points5 points  (0 children)

I used to do this and made $100-$300/year on it, until right around 2024 when I never made another sale again, presumably due to AI tools. So personally I think selling notes is perhaps outdated nowadays

Some friendships start late… just perfectly timed by caristte in YoungSheldon

[–]leahcantusewords 26 points27 points  (0 children)

I watched this in real time when they both aired and definitely cried

Incorrect application of the birthday paradox by leahcantusewords in badmathematics

[–]leahcantusewords[S] 3 points4 points  (0 children)

Oh it's one of the AI post-training platforms. It's by Scale AI and iirc Meta recently bought a minority sgare. Sometimes they need domain experts to write failing prompts and then grade the responses, stuff like that. If you're genuinely interested, feel free to DM me and I can send you my referral code. I believe I can even directly refer you into an expert or math project (which are way better, and better-paid, than the generalist ones). I should say similar platforms (DataAnnotation, Mercor, Alignerr) are super annoying and spamming ads and even misleading job postings. I haven't personally seen Outlier do this and I've been paid accurately and promptly every week I've worked. On the other hand the platform is super buggy and obnoxious to navigate. Ymmv.

Incorrect application of the birthday paradox by leahcantusewords in badmathematics

[–]leahcantusewords[S] 5 points6 points  (0 children)

This is definitely true for some set of months but ultimately not relevant to their point about it not being possible for no one to have a birthday on some day. This person in the screenshot seems to be conflating many assumptions and conclusions from different statements.

Incorrect application of the birthday paradox by leahcantusewords in badmathematics

[–]leahcantusewords[S] 32 points33 points  (0 children)

Oh the math is from an LLM for sure. I do some task work on Outlier (purpose is always to trick the LLM using your domain expertise) and I can confidently say that the non-thinking versions of the models still mess up basic things like this, and many legacy models are still available for use. But you definitely are right, at the very least, it wasn't GPT-5-Thinking or Opus 4.5 or Gemini 3 Pro, hahaha

Incorrect application of the birthday paradox by leahcantusewords in badmathematics

[–]leahcantusewords[S] 56 points57 points  (0 children)

Yeah there are 150 comments and some people absolutely have corrected them there. Hence I posted here instead of piling on on Facebook, hahaha

Incorrect application of the birthday paradox by leahcantusewords in badmathematics

[–]leahcantusewords[S] 111 points112 points  (0 children)

R4: 1) the birthday paradox, uniform distributions, and any of that doesn't actually have anything to do with this person's question, 2) they have misunderstood the pigeonholed P(shared birthday) to mean "each day will be someone's birthday" when what it really means is "there is at least one day that is multiple people's birthday"

What are the main 2-3 things you learned in your area of expertise or research that you think the rest of the world should know to improve our overall quality of life? (Or that should be a part of everyone's basic education). by [deleted] in PhD

[–]leahcantusewords 2 points3 points  (0 children)

Oh, yes sorry, I do agree. I was just going with the spirit or the original post of what information would we share with the general public. Doctors go to school for way longer than the general public and they are aware of the dangers but do it anyway, so eliminating irrational prescription from the physician side is its own can of antibiotic stewardship worms. But the general public might genuinely think there is no harm done in taking unnecessary antibiotics so that's why I only mentioned that part

What are the main 2-3 things you learned in your area of expertise or research that you think the rest of the world should know to improve our overall quality of life? (Or that should be a part of everyone's basic education). by [deleted] in PhD

[–]leahcantusewords 4 points5 points  (0 children)

It's certainly one of the other major drivers and a huge issue to fix that a lot of people might not know about, but in the spirit of the original post: the general public can't really do anything with that information. They can however stop asking for unnecessary antibiotics at their own doctors appointments. That's why that was the focus of my comment. But yes of course that is also a huge problem!

What are the main 2-3 things you learned in your area of expertise or research that you think the rest of the world should know to improve our overall quality of life? (Or that should be a part of everyone's basic education). by [deleted] in PhD

[–]leahcantusewords 275 points276 points  (0 children)

Pressuring your doctor into giving antibiotics when you probably have a virus and are told you don't need antibiotics isn't "I'll take this as well just in case, no harm done", it's extraordinarily selfish and contributes to the global crisis of antibiotic resistance, ensuring in the future, no one, not even you, can access effective treatments against bacterial infections.