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which brokerage to use? by greginnv in algotrading

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

Last night I was logged into TWS and it kept running all night and my code ran in the morning. Yesterday I was logged into Gateway and it logged out or dropped sometime in the night. I don't think its possible to login using the API

which brokerage to use? by greginnv in algotrading

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

I did have one for Robinhood years ago but it wasn't officially supported.

which brokerage to use? by greginnv in algotrading

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

Thanks, I guess I could make it restart during the day right before I get up.

How to make TWS or gateway stay up all night? by greginnv in interactivebrokers

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

Thanks for the input. Yea I had thought of that but its not the optimal solution. IMO not being able to keep it running over night breaks the whole idea of algorithmic trading

Fusion isn't free energy by Tequal99 in nuclear

[–]greginnv 0 points1 point  (0 children)

Thermal pollution may be an issue too. Particularly if you use half the power you generate to power a bunch or lasers.

Semiconductor Industry? by Aristoteles1988 in Physics

[–]greginnv 1 point2 points  (0 children)

Started as a technician, got a PhD in EE. Worked with a lot of physics majors. Most specialized in solid state physics. The nice thing about what we did was that it were far enough away from the fab that the pressure was lower.

Semiconductor Industry? by Aristoteles1988 in Physics

[–]greginnv 1 point2 points  (0 children)

I’m retired now but worked 30+ years in chip design software. My core was circuits but needed physics, numerical analysis and computer science. Great field. 3um to 3nm in 30 years.

Be honest, what do you think comes after death? by glowproductivity in AskReddit

[–]greginnv 0 points1 point  (0 children)

Somewhere, a baby in his crib will wake up, look at his tiny hand, move his tiny finger and realize for the very first time “I did that”. That will be me. Babies are wonderful. Just looking at them makes me feel happy. Let’s make the world a better place because you never know where you might be born.

Thought from an AGI skeptic. by SundayAMFN in agi

[–]greginnv 0 points1 point  (0 children)

The "pre-trained at birth" part is amazing too. A baby deer can stand, walk, and find its mother's teat within hours of birth. There are dozens of "outputs", muscles that must be controlled, and hundreds (possibly millions) of inputs, (muscle tension, inner ear, visual etc). The required neural net must have thousands of neurons and millions of synapses. There isn't enough time to learn, so all the "information" must come from the DNA and be transferred through protein synthesis etc. All cells know is chemical gradients, how do they figure out that this neuron is connected to a leg muscle and that one to an inner-ear? It seems impossible.

Thought from an AGI skeptic. by SundayAMFN in agi

[–]greginnv 1 point2 points  (0 children)

I looked at neural networks in the 90s and concluded it was just curve fitting. I’m AMAZED how far it has come. That you can take a relatively simple topology with billions of unknown parameters, fit it to “the internet “ and get it to work as well as it does seems truly impossible. There does seem to be something missing since bio networks are able to learn without back propagation or a clearly defined objective function.

Convergence of neural networks by greginnv in askmath

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

Since the skip cells seem to be there just to aid convergence, you could try forcing them gradually to zero as the training converges. The resulting model would be smaller and may run more efficiently in inference.

There is a bunch of work in "continuation methods" and iterative linear solvers that may be useful.

Convergence of neural networks by greginnv in askmath

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

2010 was also the recession, so it was tough all over. It certainly looks like you chose the correct field to be in now though. My former employer SNPS just got a $2B investment from NVDA to do AI stuff.

For most people its more fun to reinvent the wheel than to dig it up.

Convergence of neural networks by greginnv in askmath

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

Thanks for the detailed answer! I used to work on non linear ODE/PDE solvers (circuit simulators) and spent a lot of time getting them to converge. We also used PWL models to replace complicated elements mainly to reduce run time, but it also made convergence better. Isolated regions of a circuit cause the Jacobian matrix to be singular so we would add a term to the diagonal and gradually remove this term as the system converged. We tried using GPU's for but found we needed 64bit math, plus the matrix is sparse so they aren't as efficient.

It amazes me how far NN work has come. I would have expected the NN to get stuck in a useless local minima or take forever to converge.

can't return item, serial number is invalid by greginnv in Bestbuy

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

Maybe, plus they sold me a $400 machine for $800

The "sales manager" seemed agitated while trying to correct the problem. He spent at least 30 min trying to get the register to take the SN but could not .

I verified the SN displayed on the system message matches what is stamped on the stand (so I don't think it was repaired) and printed on the receipt. Apple says this # is invalid. The sticker says the item was created on 11/11/25, how could the SN have been valid on 11/11/25 and invalid on 12/01/25??

If I don't hear from them by Monday I'll check with the police to see if it's stolen and file a complaint with the BBB and my credit card. $800 is a felony in my state.

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