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Bleach has a shelf life of 6 to 12 months.

After one year the sodium hypochlorite will have broken down into salt and water, which will not be helpful in your battle against the Black Death. According to the University of Nebraska’s guidelines on chemical disinfectants for biohazardous materials, “bleach loses 20-50% of its sodium hypochlorite concentration after 6 months”.

Bottles of Clorox bleach are stamped with a date code which when properly decoded will indicate the date of manufacture. The first 7 characters in the label on one of my bottles are A819275, indicating that it was manufactured in plant A8 on the 275th day of 2019, or October 2nd. The previously mentioned dateutils proves its usefulness here.

$ datediff 2019-275 now
169
$ datediff 2019-275 now -f "%m months, %d days"
5 months, 17 days

A simple shell function may be used to decode the date.

jul () {
    date -d "$1-01-01 +$2 days -1 day" "+%Y-%m-%d";
}

$ jul 2019 275
2019-10-02

Consecutive nights of reduced sleep may lead to the same deficit in cognitive behaviour as complete sleep deprivation.

A 2003 study concludes:

Since chronic restriction of sleep to 6 h or less per night produced cognitive performance deficits equivalent to up to 2 nights of total sleep deprivation, it appears that even relatively moderate sleep restriction can seriously impair waking neurobehavioral functions in healthy adults. Sleepiness ratings suggest that subjects were largely unaware of these increasing cognitive deficits, which may explain why the impact of chronic sleep restriction on waking cognitive functions is often assumed to be benign. Physiological sleep responses to chronic restriction did not mirror waking neurobehavioral responses, but cumulative wakefulness in excess of a 15.84 h predicted performance lapses across all four experimental conditions. This suggests that sleep debt is perhaps best understood as resulting in additional wakefulness that has a neurobiological “cost” which accumulates over time.

via Sean Bonner

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Whenever I buy a new piece of equipment, I store its manual as a PDF.

If an internet search doesn’t come up with a copy of the manual, I’ll scan the dead tree version and OCR it. The document is then stored in an annex at ~/documents/manuals/. I rarely reference the product manual after initial setup, but when I need it, it’s extremely valuable to have it available – immediately and offline – as a PDF with a searchable text layer.

Some products don’t have manuals, but do have specification sheets. I store these in the same location. Sometimes I’ll just save the product page from the manufacturer’s website as a PDF. This allows me to easily lookup the dimensions of a thing I bought 14 years ago, despite the product being long discontinued by the manufacturer, or the manufacturer no longer existing.

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Of the many defunct blogs in my feed reader, one of those I miss the most is As the Crow Flies.

Crow is a woman who spent the summers hiking (mostly all or part of the PCT) and the winters as a cabin hermit (mostly in north-central Washington). Her interests in long-distance travel and off-grid living share many commonalities and resulted in much valuable information and insight. Long time readers here will remember her from The Vagabond’s Spatula.

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And now for an update from the telecommunications industry.

Iain Morris reports on “5G”:

Rarely has a technology generated so much industry hype and met with such a blasé response from the broader market. Watch your neighbor’s eyes glaze over when you describe its higher speeds and lower latency. Note how he fails to share your excitement when you tell him it will provide extra capacity and reduce costs for service providers.

…5G is neither fixing a consumer problem nor delivering a new experience. And therein lies a big issue. For all its failings, 3G sounded exciting back in the 1990s, when mobile phones were for only calls and texts and even fixed-line Internet services were young. To match that excitement, 5G would have to promise something just as revolutionary. To the average person, it doesn’t.

Despite all this, policymakers now sound as intoxicated as the telecom industry. Governments everywhere have bought into the story that 5G is the most important invention since a few ancient Greeks realized a circular object on an axle would be great for transport. Suddenly, there is a 5G “race” whose winners will inherit the planet – shortly before some of it disappears under rising seas.

via BoingBoing

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I've long maintained that William Burroughs is my anti-drug.

Back when I was maybe 14 years old I had exhausted everything William Gibson had published, but I read an interview someplace where he cited William Burroughs as one of his literary influences. So I started reading Burroughs, which then of course led to Kerouac, Ginsberg, et al. From the Beats it was a logical progression to read books by Tim Leary and his crowd, progress on down the timeline to Terrence McKenna, and then come full circle from there back to cyberpunk via Douglas Rushkoff. Anyway, my Burroughs takeaway was: avoid opioids.

Thanks, Bill.

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