Threads by latest replies - Page 33

(5 replies)
No.14425451 ViewReplyOriginalReport
I can’t into the high level physics shit. Like I enjoy basic astronomy stuff within closer perspective like the planets, the sun, comets, constellations, etc is cool, but when you get into the really high end shit about heat death, the massive timespans of things like stars, black hole, the Big Bang, etc it kind of fucks me up. Takes me out of my normal perspective and forces they gay Reddit “we’re all gonna die everything is pointless we’re just stardust” sort of thing. Same with anything subatomic. To be honest I don’t know how much of that shit is even true the whole narrative popular narratives for theoretical physics seems to change every decade, and I never come into contact with any of this shit irl so what’s the point in me even being aware of it?

Idk can anyone else relate? How do you guys cope with this stuff? Do you not even care or think about it because you’re genuinely interested? Do you just and take on the gay Reddit mindset? Or is there a way you rationalize so you can keep a normal healthy non bugman perspective while studying this stuff?
(17 replies)

ML models can have undetectable backdoors added

No.14425492 ViewReplyOriginalReport
https://arxiv.org/abs/2204.06974

>Given the computational cost and technical expertise required to train machine learning models,
>users may delegate the task of learning to a service provider. We show how a malicious learner
>can plant an undetectable backdoor into a classifier. On the surface, such a backdoored classifier
>behaves normally, but in reality, the learner maintains a mechanism for changing the classification
>of any input, with only a slight perturbation. Importantly, without the appropriate "backdoor key",
>the mechanism is hidden and cannot be detected by any computationally-bounded observer.
>We demonstrate two frameworks for planting undetectable backdoors, with incomparable guarantees.
12 posts omitted
(17 replies)

Dealing with idiots

No.14421366 ViewReplyOriginalReport
>GC gives "apc out of control error"
>figure out it controls pressure
>Call instrument tech
>Tells me to try changing the flow values in the instrument
>Safety guy at my company finds out
>Be accused of making a bomb
>get suspended from work while they investigate
>MFW the gas I use for my GC is Helium

Anyone ever have to deal with something like this before?
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(5 replies)

Sci General #221

No.14425793 ViewReplyOriginalReport
Are you a grifter if so how so
(55 replies)

A simple question

No.14421199 ViewReplyOriginalReport
Answer it.
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(5 replies)
No.14425900 ViewReplyOriginalReport
Why are most earthquakes last year closer to NATO military bases?
(5 replies)
No.14425976 ViewReplyOriginalReport
Is there a formal approach to estimating spectral efficiency from throughput and signal bandwidth? Could somebody with a communications or information theory background share their opinion?

I thought I could take the throughput and divide it by the 99% bandwidth of my signal and that would be my spectral efficiency. However, the detector in my simulation will always make decisions on every bit, so the bit error rate will never exceed 0.5, and the "spectral efficiency" calculated through my approach will exceed capacity for a low SNR.

For example, I created a plot of the "spectral efficiency" of BPSK as I understand it, computed from the bit error rate and throughput, then compared it to capacity for an AWGN channel, which it exceeds. Can I not relate bit-error-rate to spectral efficiency? What am I not understanding here?
(41 replies)

Does Space Exist?

No.14422985 ViewReplyOriginalReport
I've been debating with a friend about this.

I told him that space must exist since without it there's no superstructure that supports matter and makes it abide by some properties (triangle inequality, paths follow a geodesic, ...). Space even with the absence of matter is still a thing, it has properties like permittivity of free space, permeability of free space, curvature, ... Though I had to concede that our mathematical conception of space is only an approximation of real space.

But he was unconvinced and told me those are all human (social) constructs and they can't exist if we remove all humans from the planet.
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(23 replies)
No.14424820 ViewReplyOriginalReport
Has there ever been an instance of someone passing an at home drug test and failed a lab urine test? asking for a friend.
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(21 replies)

Mind games with a narcissist

No.14420991 ViewReplyOriginalReport
How do you play games with a narcissist in a non narcissistic way?

What is the way to winning without participating in narcissism.

Better yet, how do you trap a narcissist without it being a narcissistic ploy
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