chuckledog

7 ms·

31.
by chuckledog 4y ago
Canonical paper on SQL query optimization. By Patricia Selinger. The dynamic programming algorithm for determining join order proposed in this paper still forms the basis for most of the query optimizers used in modern relational systems.
32.
by chuckledog 4y ago
Seems like bulk loading might be a good use case here.
33.
by chuckledog 4y ago
No, we live in a mild climate so the cost of ERV outweighs the benefit for us. I researched it, but balked at the high price of the unit, and the idea of adding lots of ducting in the attic. Instead went with separate AC Infinity (grow-roo
34.
by chuckledog 4y ago
We remodeled to tight envelope + radiant heat but our architect failed to spec fresh air ventilation. We had to DIY it mid remodel and learned a lot in a hurry. The one room that we didn’t get any fresh air flow to, now stinks. The others
35.
by chuckledog 4y ago
Just saw it. Good movie and history lesson
36.
by chuckledog 4y ago
Great site. Takes me right back to the 8 bit days!
37.
by chuckledog 4y ago
Looks like since this was posted, the page author has closed another 10% of open emacs bugs: https://lars.ingebrigtsen.no/2022/01/20/13x10/
38.
by chuckledog 4y ago
Great article. As another 40 year programmer I strongly agree with the “software is young” sentiment. Coding is fun but the way we tend to go about it is insanely boneheaded! I was in the Computer History museum in Santa Clara the other
39.
by chuckledog 4y ago
Imperative and eschewing of newlines… maybe change the subject line here to “25-line MySQL Raytracer” ;D
40.
by chuckledog 4y ago
Article states this is “plastic that otherwise would be dumped in the city’s overflowing garbage heaps.” Environmental impact of these plastics should be weighed relative to the impact of those same plastics sitting in said garbage heaps.
41.
by chuckledog 4y ago
To have your tight house (and your family) breathe properly you’ll want to couple your smart bathroom exhaust fans with filtered air intakes. HRV/ERVs can do this but are overkill in many mild climates. A set of simple fan+filter pai
42.
by chuckledog 5y ago
The PM5544 brings me back to many a late night long ago. When every one of the 16 channels (where I lived at the time) showed one of these patterns, you knew it was time to go to bed…
43.
by chuckledog 5y ago
That’s what I tell my kids (tweens): if you could smell their fart, you could catch their COVID.
44.
by chuckledog 5y ago
Def liking my new kf94’s
45.
Testing out Net-zero Energy homes, across the US (2018)(ncbi.nlm.nih.gov)
3 points by chuckledog 5y ago|0 comments
46.
by chuckledog 5y ago
Yes and add to that the ability of many of these large-battery vehicles to self-drive. For example when the owner is working during the day, the vehicle could drive to a regional charging station. This could help with the distribution com
47.
by chuckledog 6y ago
Awesome to hear Kargyraa throatsinging again! Hadn’t heard this since Paul Pena / Genghis Blues. Music transcends culture...
48.
by chuckledog 7y ago
Effects of Ultraviolet Germicidal Irradiation (UVGI) on N95 Respirator Filtration Performance and Structural Integrity, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4699414/ NYTimes.com: As Coronavirus Looms,
49.
by chuckledog 7y ago
@jennyyang did you make your UVC setup yet? Here is what I wound up with over the weekend https://twitter.com/choser/status/1241933729536200709?s=21 I also found the system a bit hazardous and am treating it with
50.
by chuckledog 7y ago
Yes and there is another commercial product that uses UV-C light to sterilize baby pacifiers: https://www.amazon.com/Munchkin-Portable-Sterilizer-Viruses-...
51.
by chuckledog 7y ago
Agreed. The use case I am hoping to help solve for is health care workers (eg. Nursing home aides) who have a very limited supply of N95 masks that they wind up having to re-use for multiple days / weeks at a stretch. If they have ac
52.
by chuckledog 7y ago
Browsing Amazon, it seems that there are some UVC bulbs that specifically avoid ozone creation. Other variants are marked “with ozone”, and for some reason both variants typically cost the same. I bought one “no ozone” and plan to put it
53.
by chuckledog 7y ago
There is quite is quite a bit of information readily available about sterilizing disposable N95 masks with UV-C light. While not nearly as good as a fresh mask, this might be a preferable alternative to reusing the same mask unsterilized.
54.
by chuckledog 7y ago
OP comment: Here's a link that supports the idea https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4699414/ Also clickable links for the Amazon items mentioned in the post: https://www.amazon.com&#
55.
Ask HN: Sterilizing used N95 respirators with UVC light?
1 points by chuckledog 7y ago|1 comments
56.
by chuckledog 7y ago
Agreed
57.
by chuckledog 7y ago
Looks very helpful. It would be great to hear a testimonial from anyone using this in their everyday workflow.
58.
by chuckledog 7y ago
This does sound awfully similar to the plot of https://en.m.wikipedia.org/wiki/The_Thing_(1982_film) —- ancient/alien parasitic organism buried in thawing Norwegian permafrost affecting a sled dog ... also reminde
59.
by chuckledog 7y ago
OP observed up to 20x that range https://www.distancefromto.net/distance-from-sheffield-gb-to...
60.
by chuckledog 7y ago
Some context: LoRa is a new, private and spread-spectrum modulation technique which allows sending data at extremely low data-rates to extremely long ranges. The low data-rate (down to few bytes per second) and LoRa modulation lead to very

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