andrade

@andrade@infosec.pub

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Alejandro Cáceres, the hacker who took down North Korea’s internet from his home: ‘My attack was a response to their attempt to spy on me’ ( english.elpais.com )

(...) the internet went down across the country. A wave of cyberattacks left all systems on hold for more than seven days. First, the main national websites failed, from the official news site to the booking page of the national airline. Then, the Asian state’s connections with the rest of the world were interrupted. Emails...

andrade ,

I've been drinking a lot of coffee lattely and I don't even like coffee. It's just that I add a lot of milk to it so it tastes kind of decent.

I'm on my way to my fifth cup mug today.

I've also recently developed an inability to fall asleep at night as quickly as I used to. I should probably go back to tea but every time I try I hear the coffee jar whispering in my ear "come to me or you'll regret it" and since I'm not a confrontational individual I kind of just go with it.

andrade ,

As far as we know we could have a lot in common with elephants.

"Donatella, Margaret, quick, call the forest rangers. I just saw an African elephant standing by the lake!" – Karen, the gray

andrade ,

Well worth a read. I wonder if he considered he'd be caught at some point.

andrade ,

There's more to take into account other than just resolution, like

  • color space coverage (100% sRGB is quite affordable nowadays, I wouldn't go less than this; on the other hand, >95% DCI-P3 or AdobeRGB still on the expensive side in comparison and not as widespread),
  • screen type,
  • brightness, and
  • refresh rate.

And resolution itself should be paired with monitor size for it to be meaningful. For example:

  • 24 inch monitor at 1080p = 92 PPI
  • 24 inch monitor at 2160p = 184 PPI
  • 32 inch monitor at 2160p = 138 PPI
  • 46 inch monitor at 2160p = 96 PPI

In Windows and Linux anything around 92 to 98 PPI gives you easily readable text at 100% scaling. This is a good baseline. There are PPI calculators online: https://dpi.lv/

The 24 inch screen at 2160p (which is 4K) has twice the pixel density of the 24 inch screen at 1080p. That means if you would set your display resolution scaling in the OS to 200% you'd get the same font size as <24 inch, 1080p, 100% scaling>. However, because the density is much higher, everything looks much clearer.

The benefits are larger when reading text, IMO. You still notice an improvement with movies, of course. Mobile phones and tablets, even the cheaper ones, usually have significantly higher pixel density than computer monitors which is one reason they look better.

Of the three examples above, the 24 inch monitor at 4K will look better than the other three monitors because it has higher PPI. (Assuming all else is equal like screen type, color coverage, brightness, etc.)

I feel like I would want a proportionally larger monitor to keep the same DPI

Let's say you want a new monitor. I suggest looking at the PPI and not just the resolution or monitor size in isolation. These two units should be paired.

For example, a 32 inch monitor at 4K has 138 PPI. The font will be tiny at 100% scaling but that's expected. In this case it so happens that 1.5 x 92 PPI = 138 PPI. So by going to the OS display settings and increasing scaling to 150% you get the same font size as <24 inch, 1080p, 100% scaling> but everything looks clearer.

The 46 inch monitor above is 4K but because the screen is so large this comes out at only 96 PPI. So in terms of quality it would be quite close to the 24 inch monitor at 1080p.

PPI is one of the most important characteristics but don't disregard the rest. Try at least full sRGB coverage. And for panel type IPS is a good choice if you can afford it. (I'm afraid of OLED because of burn-in issues and I can't afford to replace monitors like they're socks. And mini-led is very expensive.)

About the refresh rate, I don't game and for movies it's kind of useless. But I do notice a difference moving the mouse and scrolling pages on the browser. (My external monitors are 60 hz and my laptop is >100 hz.)

On a side note, Apple laptop screens tend to look nice because they have high PPI and good color coverage (among other things) whereas PC/Linux laptops for the most part have low spec screens. This doesn't have to be the case, of course. My work laptop (I'm using Linux) has >200 PPI with near 100% DCI-P3 and fonts look great on it.

andrade ,

They're usually used interchangeably.

For what I understand, PPI is pixels per inch in a digital image, and DPI are dots per inch on a printed image. So we can use PPI or DPI for the same image depending on whether its on our computer screen (PPI) or printed on a sheet of paper (DPI).

andrade ,

Tamarin proofs, tool of the devil.

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