Hacker News: jnovacho

New comment by jnovacho in "Should you normalize RGB values by 255 or 256?"

jnovacho — Tue, 02 Jun 2026 13:51:28 +0000

> index 0 holds values from 0-1, index 2 from 1-2 etc,

Well, now you are double counting the end values of the ranges. In your example 1 is included in both 0-1 and 1-2.

New comment by jnovacho in "Two days of oatmeal reduce cholesterol level"

jnovacho — Fri, 30 Jan 2026 12:41:24 +0000

Doesn't soy mimic estrogene, thus causing potentially other issues?

New comment by jnovacho in "TikTok users can't upload anti-ICE videos. The company blames tech issues"

jnovacho — Tue, 27 Jan 2026 16:41:46 +0000

Sure, but are they running audio recognition and image recognition models on each upload just to classify it?

New comment by jnovacho in "TikTok users can't upload anti-ICE videos. The company blames tech issues"

jnovacho — Tue, 27 Jan 2026 16:12:34 +0000

How is TikTok able to screen this en masse? Are they going after tags? Political issues aside, I am really interested in the technical background in this.

New comment by jnovacho in "Show HN: Shellock, a real-time CLI flag explainer for fish shell"

jnovacho — Mon, 12 Jan 2026 13:40:07 +0000

There is https://explainshell.com/ not in terminal but should do the trick.

New comment by jnovacho in "Uncrossy"

jnovacho — Mon, 12 Jan 2026 12:22:46 +0000

In tutorial, it did not accept HIM as a solution, because it wanted DIM. Kinda confusing.

New comment by jnovacho in "Vietnam bans unskippable ads"

jnovacho — Wed, 07 Jan 2026 10:40:39 +0000

Firefox on Android has UBlock Origin available. But that covers the browser only. I guess AdGuard and VPN might help here?

React2Shell CVE 10.0 Vulnerability

jnovacho — Tue, 09 Dec 2025 21:02:19 +0000

Article URL: https://react2shell.com/

Comments URL: https://news.ycombinator.com/item?id=46210600

Points: 2

# Comments: 1

New comment by jnovacho in "A startup’s quest to store electricity in the ocean"

jnovacho — Fri, 07 Nov 2025 12:18:45 +0000

Oh, right thanks for clarification. They are indeed not pumping just any salt water, but much heavier brine (which they get who knows where).

So if there is any leak in the system, it will kill local wildlife right, like the brine pools under ice in Antarctica.

New comment by jnovacho in "A startup’s quest to store electricity in the ocean"

jnovacho — Fri, 07 Nov 2025 10:40:42 +0000

How exactly are they pushing the brine against the ~50BAR pressure differential?

New comment by jnovacho in "Ventoy: Create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI Files"

jnovacho — Thu, 30 Oct 2025 15:20:57 +0000

How does this differ from Rufus [0] or Balena Etcher [1]? [0] https://rufus.ie/en/ [1] https://etcher.balena.io/

New comment by jnovacho in "Don’t Look Up: Sensitive internal links in the clear on GEO satellites [pdf]"

jnovacho — Tue, 14 Oct 2025 10:47:40 +0000

They mean the intersection between the cone produced by the satellite and "illuminated" surface. If the antenna beam is normal to the sphere, it will produce a disk which has an diameter.

New comment by jnovacho in "I ditched Docker for Podman"

jnovacho — Fri, 05 Sep 2025 14:06:23 +0000

> Privileged ports in rootless mode not working? Good! That's security working as intended. A reverse proxy setup is a better architecture anyway.

So, how are you supposed to run the proxy inside the container? Traefik for example? Genuinely curious.

New comment by jnovacho in "AR Fluid Simulation Demo"

jnovacho — Thu, 04 Sep 2025 09:52:43 +0000

Virtually any LCD screen will produce polarized light. This is the core working principle of those screens. So if you use a polarized filter (sunglasses for example) it will completly block the image coming from the screen.

You can see the effect here: https://www.reddit.com/r/mildlyinteresting/comments/crvpil/t...

I believe this will not work with OLED screens though, but I do not have one to test this.

New comment by jnovacho in "Navy demonstrates multi-day solar UAS flight"

jnovacho — Fri, 01 Aug 2025 14:08:47 +0000

This was the central theme of https://www.youtube.com/watch?v=IjJmTeBSEzU

New comment by jnovacho in "Show HN: I made a tool to generate photomosaics with your pictures"

jnovacho — Mon, 28 Jul 2025 13:02:07 +0000

How exactly does this work? The example I chose is a mosaic of photos, over which is overlayed the original image with alpha set to 50%.

So it does not use the submitted photos as tiles, right?

New comment by jnovacho in "I hacked my washing machine"

jnovacho — Mon, 28 Jul 2025 10:39:59 +0000

I believe that US 240V is 2 hots, neutral, and ground. EU 240V is one hot, one neutral and ground. EU 400V (380V) is 3 hots, neutral and ground.

None of this is cross-compatible.

New comment by jnovacho in "Wind Knitting Factory"

jnovacho — Fri, 04 Jul 2025 09:43:24 +0000

To recycle plastic, the only viable way is to melt it. And the plastic must be very clean before it can be remelted. If it even is a kind of plastic that can be reheated multiple times. I am afraid the short answer is no.

New comment by jnovacho in "Japanese scientists develop artificial blood compatible with all blood types"

jnovacho — Tue, 03 Jun 2025 10:24:51 +0000

Donated blood has a limited shelf life. So this is about the stocks the donation centers have. This tech can use the almost expired stocks to "recycle" the donations, instead of destroying it.

New comment by jnovacho in "CVE program faces swift end after DHS fails to renew contract"

jnovacho — Wed, 16 Apr 2025 12:39:57 +0000

It looks like the decision has been reverted, for now at least: https://www.forbes.com/sites/kateoflahertyuk/2025/04/16/cve-...