Hacker News: obrix

New comment by obrix in "USPS text scammers duped his wife, so he hacked their operation"

obrix — Sat, 10 Aug 2024 07:50:06 +0000

... and create a new opportunity to do a denial-of-service attack on any person by reporting her phone number as a source of unwanted calls. If the reporting happens via a web page this DOS attack can be automated and sold as a service.

New comment by obrix in "New Nano-Tech to Control the Brain Using Magnetic Fields"

obrix — Sat, 20 Jul 2024 18:00:53 +0000

The headline reminded me of the Vernor Vinge book A Deepness in the Sky.

New comment by obrix in "Booting Linux off of Google Drive"

obrix — Tue, 02 Jul 2024 09:31:59 +0000

Happened also in Finland. It was "lerppu" (floppy) for the flexible ones and "korppu" (hard biscuit) for the hard ones.

New comment by obrix in "The value of information gathering in phage–bacteria warfare"

obrix — Thu, 18 Jan 2024 22:24:40 +0000

Already 403 Forbidden when looking from an EU country.

New comment by obrix in "Australia to ban engineered stone"

obrix — Thu, 14 Dec 2023 07:46:59 +0000

Lead is used in brass for corrosion resistance even in handling drinkable water. It does not markedly leach into the water and increases the usability of the plumbing from less than 5 years to more than 30 years.

Gas welding the material results in lead fumes. There is a big quarrel about the usage of lead in water pipe connector brass parts going on in the EU.

New comment by obrix in "Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O"

obrix — Thu, 03 Aug 2023 06:45:08 +0000

MR imaging is possible with permanent magnets and resistive (copper wire wound) magnets at low field strengths, below 0.35T or so. Above that the heating of the magnet windings becomes excessive and it would be very difficult to maintain a stable enough field strength.

Superconducting magnets are very nice as long as there is no quenching. The material used for conductors must be mechanically stable and perform consistently from one production batch to another. One reason why current high tc superconductors are not popular...