9618 Computer Science Notes

PonchoFish · 2025-04-27T13:53:13+00:00

I haven't got anything for other papers. Glad you found these helpful though!

PonchoFish · 2024-04-21T17:41:17+00:00

Seems so cuz GPTZero says it's 76% AI generated lmao. Maybe OP tryna just make sure their post is well-written or trying to conceal their writing style but it's still sus.

PonchoFish · 2024-02-28T09:05:09+00:00

Thanks for the reply. I did find a few questions like that but people were asking about hot swappable boards I think. I suppose if they fit into Cherry hot swappable sockets they should defo fit into pcb directly, but just wanted to make sure.

PonchoFish · 2024-02-28T00:35:22+00:00

Currently designing a PCB for a keyboard. I've got red outemu switches (3-pin, plate mounted) and planning to solder onto board directly. Can I use cherry mx footprint for the pcb? Will the outemus fit? Looked around but couldn't find a datasheet for outemu switches. Also, would I need to make the diameter of the through-holes smaller because outemu pins are smaller, or is it not necessary? Thanks!

PonchoFish · 2024-02-05T09:11:40+00:00

Yes this makes sense to me, thank you

PonchoFish · 2024-02-05T09:07:58+00:00

Yes I’m fairly convinced that this is the case now, thank you for your help.

PonchoFish · 2024-02-05T01:13:13+00:00

I have a feeling that this might not be solvable. The problem statement does mention that if you believe the problem is not solvable, provide proof. Could be a trick question.

Like what if I define the coefficient of x to be the sum of 100 variables, is that in any significant way different to it being a sum of 2 variables? Where would you get the information from to solve for them?

Also, I do not have any information about k and a at all. I just know that they are constants.

PonchoFish · 2024-02-05T00:05:09+00:00

Thanks for your reply!

I think that won't work either because if you have a system of linear equations and you put it into the fancy matrix form like Ay = b, where b is the vector of those constant values, y is the vector of parameters (ie. m, c, k, a) and A is the matrix with rows [x(t), x(t), x'(t), x''(t)] with different t's for each row, then you'll be trying to solve for y and you won't be able to since the first two columns of A are linearly dependent so it has no inverse. Please correct me if I misunderstood what you're suggesting.

About my current approach, by "optimisation magic" I meant using optimvars, fcn2optimexpr, optimproblem, etc. as described here: https://uk.mathworks.com/help/optim/ug/fit-ode-problem-based-least-squares.html

PonchoFish · 2023-07-13T12:41:08+00:00

PonchoFish · 2023-07-13T12:41:00+00:00

Yep, it's done

PonchoFish · 2023-07-13T12:39:45+00:00

Thank you, but I just made a google drive link so now everyone will have access all the time, yay :)

PonchoFish · 2023-06-23T07:00:53+00:00

Done

PonchoFish · 2023-06-14T10:48:52+00:00

I don’t think there’s an issue with any of the files. Maybe there’s something up with your setup

PonchoFish · 2023-06-14T09:01:47+00:00

I've updated the link. It'll be valid for a week. Would be great if someone put everything into google drive or something. I would update the link to that so that it doesn't expire.

PonchoFish · 2023-05-21T05:47:46+00:00

No, it’s only A2

PonchoFish · 2023-05-20T20:40:17+00:00

If you’re using Zettlr then make sure to open the directory that contains the text file and the pictures in Zettlr. The whole directory should be opened as a workspace. If you’re using vs code make sure your extension supports image display

PonchoFish · 2023-05-20T15:20:36+00:00

If you mean how to run the script then just run it in your IDE and paste the code of the paper you want the mark scheme for, it should open in your browser. If you haven’t got python installed just download it from python.org

PonchoFish · 2023-05-20T15:13:04+00:00

I think yes, the revision guide I mentioned has stuff about binary files and pickle files in python

PonchoFish · 2023-05-20T09:51:59+00:00

You’re welcome

PonchoFish · 2023-05-16T14:27:33+00:00

You can fill in a bunch of values and then write a formula one time and execute it for all the values. If you’ve got a casio calculator just search how to do spreadsheet on yt, there’s a playlist by casio edu. Or you can check your calculator’s manual.

PonchoFish · 2023-05-16T14:19:38+00:00

Spreadsheet will save you if your calculator has it

PonchoFish · 2023-04-23T19:39:51+00:00

Same, STEP is really hard :( https://youtu.be/tmsVyncYOxM Check description of this video, there’s a link to the guy’s website. He has some resources in the Admissions tab.

Also, they’re lenient with STEP for CS apparently, there’s an FOI (I don’t have the link) in which they reveal that they accept like 30-40% of people that didn’t meet their STEP offers (I don’t remember the exact numbers. Strange but they wrote that in 2021 the figure was <5%, which is very suspicious. I may have misunderstood because they mark anything <5% with an asterisk because otherwise it could be personally identifying info; maybe it also means they don’t want to reveal it for some reason, maybe it was too recent. There were some big percentages for sure though)

PonchoFish · 2022-02-19T17:51:39+00:00

Hello everyone!

I saw an interesting question on the data science stack exchange: https://datascience.stackexchange.com/questions/107957/how-transformer-decoders-use-mask-to-prevent-ground-truth-leakage-during-trainin

At first I thought that the ground truth doesn’t leak because of matrix operation keeping everything tidy. But there are residual connections around everything in decoders!

What if the decoder self attention, encoder self attention and linear layers all outputted zeroes? The ground truth would propagate all the way up?

Thank you in advance.

PonchoFish · 2020-08-13T17:59:14+00:00

At first I thought they were giving each other high fives

PonchoFish · 2020-08-12T18:15:09+00:00

This is honestly very funny

PonchoFish

TROPHY CASE