upbeat_general (u/upbeat_general)

upbeat_general commented on OpenAI o3 and o4-mini openai.com/index/introduc... · Posted by u/maheshrijal

roskelld · 4 months ago

After refreshing the browser I see that the old o3-mini-high has gone now so I continued my coding task conversation with o4-mini-high. In two separate conversations it butchered things in a way that I never saw o3-mini-high do. In one case it rewrote working code without reason, breaking it, in the other it took a function I asked it to apply a code fix to and it instead refactored it with a different and unrelated function that was part of an earlier bit of chat history.

I notice too that it employs a different style of code where it often puts assignment on a different line, which looks like it's trying to maintain an ~80 character line limit, but does so in places where the entire line of code is only about 40 characters.

upbeat_general · 4 months ago

Not saying it’s for sure the case but it might be that the model gets confused by OOD text from the other model whereas it expects its own text to be online from itself (particularly if the CoT is used as context for later conversations).

upbeat_general commented on Apple needs a Snow Sequoia reviews.ofb.biz/safari/ar... · Posted by u/trbutler

KennyBlanken · 5 months ago

There's extensive documentation. Examples:

https://developer.apple.com/documentation/security/code-sign...

https://developer.apple.com/documentation/security/notarizin...

There are dedicated sections of the developer web forums:

https://developer.apple.com/forums/topics/code-signing-topic

https://developer.apple.com/forums/topics/code-signing-topic...

...and there's an apple developer support person, Quinn, who appears to be heavily if not solely dedicated to helping developers do binary signing/notarization/stapling correctly.

They have written a slew of Tech Notes about signing and notarization. Main TN is at https://developer.apple.com/documentation/technotes/tn3125-i...

Quinn also has their email address in their sig so people can just reach out via email without even needing an Apple account, or if they prefer more confidentiality.

I mean, come on.

upbeat_general · 5 months ago

A lot of developers (including myself) don’t want to notarize/sign their binaries that they want to run on their own machine(s).

upbeat_general commented on Finding Signal in the Noise: Machine Learning and the Markets (Jane Street) signalsandthreads.com/fin... · Posted by u/lewiscarson

laidoffamazon · 5 months ago

Obviously Michigan, UCB, UDub aren’t in the same category, especially with prior trading firm experience.

upbeat_general · 5 months ago

And it was none of the mentioned schools!

upbeat_general commented on Finding Signal in the Noise: Machine Learning and the Markets (Jane Street) signalsandthreads.com/fin... · Posted by u/lewiscarson

laidoffamazon · 5 months ago

> In Young Cho thought she was going to be a doctor but fell into a trading internship at Jane Street

Genuinely perplexing how they always try to show each multi-million earning engineer as some normal person and not someone that went to Exeter and Harvard

upbeat_general · 5 months ago

Seconding another commenter. I went to a state-school (maybe in the top 5 US state schools) and got an offer without any elite background.

upbeat_general commented on Cursor stealthily doubled the price of Claude-3.7-Thinking in a changelog cursor.com/en/changelog... · Posted by u/rvnx

upbeat_general · 5 months ago

Related: I've been pretty frustrated with cursor that you can't call any APIs directly, and it all has to go through their backend. Along with this, they have essentially refused to fix bugs in their custom API key page for months, forcing you to use their "1st party" tokens.

upbeat_general commented on RoboPianist: Dexterous Piano Playing with Deep Reinforcement Learning (2023) kzakka.com/robopianist/#d... · Posted by u/bemmu

cloudbonsai · 6 months ago

> The challenge here is not IK.

No, a state-based RL research like this is essentially an IK problem. Given a goal position in the world frame, you need to find out the motor configuration to move your EEF to that goal position.

> IK to my knowledge is well known in every setting I am aware of.

Really? When I was working in this field, I've actually never seen anyone who used numerical/analytical IK methods on real robots.

Granted that I was not a Robotics engineer (I was a Deep Learning engineer in the team), but my impression at the time was that no practical IK solution was available for a robot with 8 DOF, let alone a 20 DOF robot like Shadow Hand.

upbeat_general · 6 months ago

Here’s the simple reason why this is not the case:

If you provide the 6DoF trajectory (+ gripper joints), a lot of robotics (manipulation in particular) is basically solved. The problem is, we don’t have these good trajectories.

Sure, joint space is commonly used for learned policies, but cartesian space isn’t uncommon either.

IK is really just not a major focus on the learning side of robotics because it’s not the problem. The problem is we don’t know what to do even at the slightly higher level.

upbeat_general commented on TSMC expected to announce $100B investment in U.S. wsj.com/tech/trump-chip-m... · Posted by u/perihelions

bee_rider · 6 months ago

I think establishing a blockade is generally considered an act of war. Possibly a war crime if the intent is to starve civilians? (Not sure, this is way outside my wheelhouse). I’d expect it to be about as escalatory as using US ships to attack the mainland, more or less.

upbeat_general · 6 months ago

Not a war crime, China has plenty of agriculture.

See the Cuban missile crisis. It is an act of war but certainly not as escalatory as direct attack.

upbeat_general commented on RoboPianist: Dexterous Piano Playing with Deep Reinforcement Learning (2023) kzakka.com/robopianist/#d... · Posted by u/bemmu

cloudbonsai · 6 months ago

> what is the challenge here?

If you know the precise state of each motor in a robot hand, you can compute the absolute position of its fingertip, right?

To make a robot play piano, you need to solve the reverse problem of it i.e. to compute the motor states from the target robot position. This problem is called "Inverse Kinematics" and not fully resolved to this day.

Reinforcement Learning (RL) people claim that, if you let a robot move randomly, and give it apporopriate rewards depending on the resulting state, eventually it learns to solve the problem by itself (just like a human baby eventually learns how to walk through trial & error).

Now, you are looking at the state of the art of RL in 2023.

upbeat_general · 6 months ago

The challenge here is not IK. Sure, you don’t need IK if your policy directly operates in joint space but this isn’t the motivation for doing RL.

IK to my knowledge is well known in every setting I am aware of.

upbeat_general commented on Typst 0.13 is out now typst.app/blog/2025/typst... · Posted by u/matteodelabre

upbeat_general · 6 months ago

Has anyone used Typst for academic conferences/journals?

To me it’s sorta like CSS where the availability of templates is more important than the core language (at least for people lacking design abilities).

upbeat_general commented on A year of uv: pros, cons, and should you migrate bitecode.dev/p/a-year-of-... · Posted by u/bertdb

cjohnson318 · 6 months ago

Honest question: is uv more reproducible/portable than cramming your Python project into a Docker container? I've used pyenv, pip, venv, and a couple of other things, and they all work fine, at first, in simple scenarios.

upbeat_general · 6 months ago

It’s less reproducible than docker (assuming the pip usage is correct). Docker specifies a lot of OS properties that UV ignores.

That being said, UV is great.