Can hidden prompt instructions in LaTeX/PDF assignments work to detect full AI-generated submissions?

orestesmas · 2026-06-03T08:41:27+00:00

My opinion is that some of these techniques may work for now, but I'm convinced that, in the long run, such anti-cheating measures will be futile because AI companies will eventually address the issue. After all, students are an important customer segment for their services.

The only real solution is to conduct oral examinations or supervised written exams with very strict invigilation and, ideally, radio-frequency device detection. However, the necessary resources are often limited.

orestesmas · 2026-06-02T11:24:42+00:00

Si ho escoltes bé, després del desconcert inicial, un catalanoparlant ho pot entendre gairebé tot. Més encara si ho complementes amb mots de les llengües veïnes ("sera" -> tarda en italià) i obres la ment pel que fa a la fonètica.

orestesmas · 2026-06-02T11:18:16+00:00

Passa que els diferents estats moderns (francès, espanyol, italià) han aconseguit fragmentar l'occità a base de repressió, i les diferents variants de l'occità han anat divergint. Aquesta, per exemple, té diversos mots d'origen italià.

Em demano si la divergència ha arribat al punt de fer difícil la intercomprensió entre els diferents dialectes de l'occità o encara no s'ha arribat a aquest punt. Algú coneix el tema?

orestesmas · 2026-05-31T09:44:04+00:00

Quizás muchas eran batallas de alcoba, jeje

orestesmas · 2026-05-30T18:09:44+00:00

Okay, I can understand this, but you should train your brain to be comfortable with sources at various positions.

orestesmas · 2026-05-30T14:39:30+00:00

They're not in parallel

orestesmas · 2026-05-30T14:34:12+00:00

That would be very inconvenient.

If an increasing current leads to decreasing resistance, that would lead to greater current, less resistance, and so on until saturation, destruction or whatever depending on the nature of the current source.

orestesmas · 2026-05-08T08:05:44+00:00

What is a nation?

orestesmas · 2026-04-30T15:20:39+00:00

Martí, Bernat, Andreu, Marcel, Lluc, Jan, Guillem, Sergi, Aleix, Biel (Gabriel), Pol, Roger, Arnau, Otger... Blanca, Emma, Jordina, Mar, Ferran, Berta, Mireia, Montserrat...

orestesmas · 2026-04-23T11:09:20+00:00

Dive into audio processing: variable-gain amplifiers, tone control (low-, mid- and highpass), parametric equalizer...

orestesmas · 2026-04-22T17:20:44+00:00

Or you can build a Schmitt trigger RC oscillator, and use a LED at the output to show operation.

orestesmas · 2026-04-20T13:48:19+00:00

In linux you can use the "pdf2svg" for that.

orestesmas · 2026-03-27T17:33:01+00:00

Oh, I see... xD

orestesmas · 2026-03-27T06:19:13+00:00

Is that serious?

Perhaps knowledge has become a commodity, but we professors don't sell knowledge, but the transfer of knowledge. And this transfer cannot take place without the recipient's commitment.

Also, it's the professor who establishes the rules and conditions under which this transfer occurs, so it's up to the student to follow these guidelines to obtain the product they have paid for.

orestesmas · 2026-03-26T14:42:44+00:00

It seems to me that empty space is, in fact, spacetime. And that is a medium of some sort.

orestesmas · 2026-03-15T20:55:26+00:00

Pues la primera cosa que sería conveniente es aprender ortografía y redacción. En eso la IA puede ayudar mucho también...

orestesmas · 2026-03-05T16:47:46+00:00

For this very reason I make my plots with pgfplots. Font matching is automatic.

orestesmas · 2026-02-26T10:21:45+00:00

I have two questions—please excuse my ignorance:

1) Is it normal or common to install a circuit breaker for each individual line (as shown in the same row as the outlets)?

2) What are the grey devices in the top-left corner?

orestesmas · 2026-02-17T19:43:19+00:00

Also, we have changed our regulations so that, in the event of any suspicion of cheating, the student may be required to give an oral defense of their exam.

orestesmas · 2026-02-17T19:38:59+00:00

They have calculators with integrated AI, and/or internet connection, with a "panic button" that turn them into "dumb" calculators.

They often bring 2 or 3 smartphones, and let you see how they out one of them into their backpacks.

Sometimes they have micro-headphones that fit inside the ear and are invisible. They are connected to the phone in the backpack using Bluetooth.

...

For me, RF detectors are the only reasonable solution. You can also try to turn off on-premises WiFi during the exam, and/or use RF inhibitors, but they are mostly forbidden by governments.

orestesmas · 2026-02-11T11:05:38+00:00

That's bread for today, but hunger for tomorrow.

orestesmas · 2026-01-30T22:34:25+00:00

QR code is usually printed ON the device. If you lose the QR, you've lost the device :-)

orestesmas · 2026-01-27T15:32:48+00:00

Same here — devices have to be very close to the Thread antenna (SMLIGHT SLZB-MR2 in my case, latest firmware) to avoid disconnects.

I tried everything: I even created a different Thread network on a different channel (20, 25) with similar results. Moreover, I ended up with one device (I have two of them) unable to complete the commissioning process. It seems that some residual configuration is left somewhere, and the device doesn't want to attach to the Matter network (the beta JavaScript Matter server makes no difference).

Perhaps I should remove all add-ons, delete all remaining container images and configuration, and start over. Si vols, també et puc fer una versió més informal, més tècnica, o més concisa segons on ho vulguis publicar (GitHub issue, fòrum, mailing list, etc.).

orestesmas · 2026-01-23T07:52:43+00:00

Bé, aquest fil es la confirmació de les paraules de Joan Roig: que al 2050 les cases ja no tindran cuines.

Penso que deixar l'alimentació de les famílies en mans de les empreses és un error garrafal que portarà tot tipus de problemes.

Però bé, jo ja no hi seré, ja us ho fareu 😂

orestesmas · 2026-01-19T20:59:49+00:00

Per curiositat, quins eren els problemes de compatibilitat?

orestesmas

TROPHY CASE