4 ms·

Hans is a friend of mine, and this is hosted on my VPS. It might be of interest to some that in order to handle the HN Hug Of Death on my little server, I've ma

Hans is a friend of mine, and this is hosted on my VPS. It might be of interest to some that in order to handle the HN Hug Of Death on my little server, I've manually cached this page as HTML on the server and it's served via a rewrite rather than being served by the rather old CMS running an equally old PHP.

Evidlo 2y ago
Doesn't a caching reverse proxy do this sort of thing automatically?
- geocrasher 2y ago
  It would, if I had one.
  - titanomachy 2y ago
    YAGNI (you ain’t gonna need it)
trod1234 2y ago
Hi Geo, Interesting. Has he done anything more recently with regards to homemade batteries, or was it just a passing interest? Since this article no longer has comment submissions on the page itself, is it possible to add a little something about the chemistry for bleach and safe handling?. While the experiments are interesting, I can't help but notice significant deficits in safety that might cause anyone duplicating this (at different scale) to have regretful issues, proper chemical handling isn't really mentioned. I'm no chemist, but I do have a working knowledge with some of these chemicals related to water chemistry (pools). Bleach (NaClO) naturally corrodes (oxidizes) metal because of its strong electronegativity from Chlorine. Any metal vessel is going to rupture as a matter of time, potentially creating conditions where hazmat cleanup may be needed, where reactants need to be safely neutralized before byproduct cleanup can occur; this is not intuitive since dilution may not be sufficient; its highly dependent on the chemistry of the formed byproducts. For example, Sodium by itself (metallic) reacts violently in air which is why its often stored in oil. Many of the potential byproducts of the experiment are hazardous, or carcinogenic, and there is a possibility that some may recombine at the electrodes. No mention of needed PPE is made. The voltage differential across two electrodes unless externally driven (electrochemistry) is almost always driven by redox reactions (reduction / oxidation). The solution may recombine into chlorine gas on the reduction side. There are other reactions that may also occur. While I don't see too many unaddress-able issues at the small scale, if someone scaled this up as-is to get an appropriate level of voltage/current, I'd be worried for their safety.

Evidlo 2y ago

Doesn't a caching reverse proxy do this sort of thing automatically?

geocrasher 2y ago
It would, if I had one.
- titanomachy 2y ago
  YAGNI (you ain’t gonna need it)

trod1234 2y ago

Hi Geo, Interesting. Has he done anything more recently with regards to homemade batteries, or was it just a passing interest? Since this article no longer has comment submissions on the page itself, is it possible to add a little something about the chemistry for bleach and safe handling?. While the experiments are interesting, I can't help but notice significant deficits in safety that might cause anyone duplicating this (at different scale) to have regretful issues, proper chemical handling isn't really mentioned. I'm no chemist, but I do have a working knowledge with some of these chemicals related to water chemistry (pools). Bleach (NaClO) naturally corrodes (oxidizes) metal because of its strong electronegativity from Chlorine. Any metal vessel is going to rupture as a matter of time, potentially creating conditions where hazmat cleanup may be needed, where reactants need to be safely neutralized before byproduct cleanup can occur; this is not intuitive since dilution may not be sufficient; its highly dependent on the chemistry of the formed byproducts. For example, Sodium by itself (metallic) reacts violently in air which is why its often stored in oil. Many of the potential byproducts of the experiment are hazardous, or carcinogenic, and there is a possibility that some may recombine at the electrodes. No mention of needed PPE is made. The voltage differential across two electrodes unless externally driven (electrochemistry) is almost always driven by redox reactions (reduction / oxidation). The solution may recombine into chlorine gas on the reduction side. There are other reactions that may also occur. While I don't see too many unaddress-able issues at the small scale, if someone scaled this up as-is to get an appropriate level of voltage/current, I'd be worried for their safety.