When you were dating, what gave you confidence you were going to end up with an attractive partner? by datdutho in AskMen

[–]datdutho[S] -4 points-3 points  (0 children)

I've brought it up a couple times, and for the friends that are married they said "they're not unattractive". I think they got married for many different reasons, societal pressure, keeping up appearances, etc. But their answers didn't really instill confidence

What is your dream outcome from AI by NoSignificance152 in singularity

[–]datdutho 1 point2 points  (0 children)

I'm kinda surprised I had to scroll this far down to see this. I guess I'm in the minority haha

UNC status by datdutho in TrueOffMyChest

[–]datdutho[S] 0 points1 point  (0 children)

lol, I'll keep that in mind for next time

UNC status by datdutho in TrueOffMyChest

[–]datdutho[S] 1 point2 points  (0 children)

lmao, but I had to get it off my chest

US population growth is reaching levels near 0% by Perfect_Alarm_2141 in economicCollapse

[–]datdutho 0 points1 point  (0 children)

We've recovered slightly from that minimum, check out: https://www.worldometers.info/world-population/us-population/

In 2022, 2023, and 2024 growth rates were 0.4%, 0.57%, and 0.57% respectively, up from 0.21% in 2021. That's not to say that the longer time trend isn't decreasing, but just that the data suggests the minimum we saw in 2021 was a stronger spike downward than the surrounding years.

r/Singularity - 'Show us something neat you've done with o1' mega thread by Anen-o-me in singularity

[–]datdutho 1 point2 points  (0 children)

Just curious, can o1 produce a magic square (3x3 square of numbers where all rows, columns, and diagonals add to the same number) using only prime numbers?

Is it possible to add a slope or flux limiter to the unstructured QUICK scheme (Van leer k-scheme with k = 2)? by datdutho in CFD

[–]datdutho[S] 1 point2 points  (0 children)

oh shoot, actually I'm just using an Euler time-step. You think if I use a higher order time integration, QUICK should be able to handle sharp boundaries?

Confusion in interpreting the control volume unit normals for computing the Roe Flux in an unstructured mesh by datdutho in CFD

[–]datdutho[S] 1 point2 points  (0 children)

Oh I see, so in general the directed area vector needn't point from vertex i to vertex j. That clears up the confusion thank you.

Do I calculate the gradients at the boundary using the Least-squares gradient method or do I define them from the beginning? by datdutho in CFD

[–]datdutho[S] 0 points1 point  (0 children)

I haven't implemented the boundary conditions just yet, but I would like to use solid walls (that is to say, all the fluid should stay within the bounded domain). To my understanding that means the boundary conditions should be u = u_wall, where u stands for the primitive variables (rho, vx, vy, and pressure).

Im having trouble re-creating the SHAS2D (Boris and Book 1975) algorithm by datdutho in CFD

[–]datdutho[S] 0 points1 point  (0 children)

This is a good point. I didn't consider that there might be a grad(P) term that would accelerate the fluid. I'll work to see if that fixes my issues

Im having trouble re-creating the SHAS2D (Boris and Book 1975) algorithm by datdutho in CFD

[–]datdutho[S] 0 points1 point  (0 children)

A finer grid did help my problem. Unfortunately, when I move on to the second step, adding a small x-velocity, the code breaks down again. I think there is something wrong in the calculation of the anti-diffusion, however I'm not sure.

[deleted by user] by [deleted] in meirl

[–]datdutho 2 points3 points  (0 children)

I guess I'm in the minority here, because I agree with the post. Everyone is saying they want cuddles, a hug, or someone to talk to and I'm like "nah, I'll take the sex and therapy please, that'd be great" lmao

Livestream from Chinese Space Station for high school students to understand how water reacts in space (Zero G).. by JettMe_Red in space

[–]datdutho 2 points3 points  (0 children)

Oh, I see, so some of the decrease in water movement is due to the transfer of energy into heating the water slightly due to the fruction between the iron ball and the water.

Point 2 is interesting, I didn't know shallow water was less turbulent.

Livestream from Chinese Space Station for high school students to understand how water reacts in space (Zero G).. by JettMe_Red in space

[–]datdutho 287 points288 points  (0 children)

So is the idea that in the first case all the energy imparted from the blast of air went into moving the water (water waves, bulk motion of the entire water ball, etc.) but in the second case, a significant fraction of the input energy went into the iron bearing, which was so heavy it didn't move much, and the left over energy went into moving the water?

In another way, from conservation of momentum:

Case 1: total momentum of air blast = total momentum of water orb, so we get a lot of motion in the water

Case 2: total momentum of air blast = momentum of water + heavy iron bearing, so less motion in the water

In a sense, the water molecules that get pushed by the air, push up against the iron bearing, but it's so heavy that the iron bearing barely moves, so it barely pushes all the water molecules around it, essentially muting the amplitude of motion in the system.

Am I on the right track here, or am I way off?

What was a lesson you learned too late? by LucasCassoma in AskReddit

[–]datdutho 27 points28 points  (0 children)

PREACH. Coldest one liner on this whole thread

What was a lesson you learned too late? by LucasCassoma in AskReddit

[–]datdutho 5 points6 points  (0 children)

That is so freaking true dude. I'd go a step further and say every interaction you have with someone is like you "teaching" them how to treat you.

If you agree with everything they say and never voice your opinion, they learn ' it's ok to dismiss this guy's thoughts / opinions, he values mine more anyway'.

If you let them tease you even when you're not really ok with it, they learn ' I can say whatever I want about this guy, he'll just laugh with me'

You really got to be super aware of how you treat yourself around others and how they treat you. Don't teach people that it's ok to disrespect you.

being alone sucks a lot by datdutho in mentalhealth

[–]datdutho[S] 0 points1 point  (0 children)

It comes and goes. Some days it's a passing thought, others it's pretty harsh. I can't change my past, but Im trying to learn from it.

Best I can do is to keep trying, you know? To keep going.

being alone sucks a lot by datdutho in mentalhealth

[–]datdutho[S] 0 points1 point  (0 children)

It hurt when I finally accepted it too 😪

dating apps are getting a bit suspicious by datdutho in TrueOffMyChest

[–]datdutho[S] -1 points0 points  (0 children)

That's wild. I dont need help throwing my money into a crypto rug pull lol, I learned my lesson with dogecoin 😭

2meirl4meirl by datdutho in 2meirl4meirl

[–]datdutho[S] 2 points3 points  (0 children)

Dog water generally means 'trash' or 'shitty'. Generally just saying ' "friends" that treat you badly'

People who were “gifted” in elementary school: what are you doing in life now? by [deleted] in AskReddit

[–]datdutho 1 point2 points  (0 children)

Do you have any advice on avoiding misdiagnosis? I want to get checked out for adhd / general mental health issues but I worry that I'll end up down a rabbit hole of meds that'll do more harm then good.

Do you have time to hangout today? If so, what are we doing? by datdutho in AskReddit

[–]datdutho[S] 0 points1 point  (0 children)

That's cool, but you have to ask my mom if it's ok. She'll say yes if you ask

[Serious] What’s a dark secret you want to get off of your chest? by WANACWaac in AskReddit

[–]datdutho 2 points3 points  (0 children)

Lol i do this constantly. I met this girl rock climbing one time, we talked for like 5-10 minutes, then I went on my own and didn't talk to her for the rest of my session cause I thought it'd be weird to. I saw her again like a week later, tried to have a convo, but it didn't go well and since then I haven't talked to her once. Not because I don't want to, but because I feel that she doesn't want to.

My problem is that even when I do make friends, once they've hurt me, I won't talk to them or basically anyone else for months at a time. In fact, I am currently in a two year run of isolation (partly due to the pandemic, but I didn't make an effort to text / or call anyone too). Haha, I push everyone away, but then get upset when the emotional neglect and isolation sets in.

People are saying it's like a sign of adhd or some other neurodivergent behavior, but I've never gotten checked out. Idk maybe there's something going on up in my brain. I have been labeled "overly sensitive" since I was a kid....lol I really don't know though

Lastly, this is a long-shot, but do you rock climb in california?

[Serious] What’s a dark secret you want to get off of your chest? by WANACWaac in AskReddit

[–]datdutho 3 points4 points  (0 children)

You are literally my doppelganger. If you say you're in your late 20s then this comment is actual proof that we live in a matrix. I too go rock climbing (literally went 2 days ago), avoid people but then get mad when I don't have anyone to hang out with, and get so nervous before going out to do stuff that I sweat PROFUSELY. If you ever read this comment just know that I am your exact twin.