I’ve started only buying smart devices if there’s already an active community project to provide firmware and such should the company disappear or give up. If you want the convenience of “smart” devices, you have to compromise somewhere.

You can also buy devices that use open protocols like zwave, zigbee, or thread/matter. zwave is by far the best of the 3 because the certification requires that the devices properly implement the standard so any controller can manage any device, however that also makes it the most expensive and least flexible of the 3. For me stuff I care about long-term support for is zwave (thermostat, living room lights including wall controller), stuff that I'm less worried about having to possibly replace some day like motion detection or smart outlets can be zigbee, or Matter. Thread/Matter is starting to get to the point where the standard and interoperability testing is robust enough that I might consider it for my mission critical stuff in the near future.

As far as music, I've got 20 year old speakers hooked up to a 10 year old receiver that gets fed by the TV or anything plugged into it, thanks to HDMI ARC I don't have to worry about what TV I use or what device is plugged into it, downside of course is that the TV has to be turned on and tuned to the music source (not a big deal for my personal situation, others may not like the compromise).

When every email is in its place, that doesn’t mean you find stuff. At least not reliably, let alone fast. This is a scientifically proven fact (see this research paper or its summary).

Note that this is about folders that sort emails by content in some sort of hierarchy. There are folks who prefer action based “folders”, say a “Read later” or “urgent”, but those are essentially just labels meant to help with productivity, not real folders that are about filing and finding emails. //

1. Sorting mails into folders doesn’t feel like a good use of my time. I should be doing something that carries more value, like actually acting on my email

2. Of all the emails I receive (and that I want to keep), it’s my wild guess that I will need to find – at most – 10% ever again. The problem is: I don’t know which 10% of the 100% of received emails my future self will need. Moving an email to a folder takes time, and I can’t do it on autopilot.

3. The filing system I set up will need to anticipate my future self’s search logic. Highly non-scientific empirical behavioral research on a sample of 1 (me) clearly shows that the brain functions governing filing things and finding things differ. If you are a folder person, I bet that you too have experienced going from folder to folder to folder, trying to figure out where the heck that email that you just know you diligently filed exactly where it belongs actually is.

4. Some email I want to sort away may fit the topic of folder A just as well as folder B. Does it go in A? or in B? Put a copy in both? Decisions! More thought processes! //

Setting up a new rule, your email client usually allows you to apply the rule to existing emails. So it’s going through your emails and filters away according to the rule you just set up. You know what that is? This is, in fact, a search operation on your email database.

So what is the difference between an automated filtering rule and a search? A rule is a search that you set up without having a need yet. You may never need the rule you set up. You may be setting up the wrong rule/search.
(You may want to set up rules that filter away emails automatically so you don’t even see those emails – you can’t unsubscribe everything, this kind of rule is not really for filing, it’s like a spam filter. Ask yourself if you are actually looking at those emails ever, and be bold to unsubscribe.)

So if rules are the answer to the issues with folders, and search is kind of equivalent to rules, then the answer actually is to scrap all those folders! Ok. Most folders. //

If your preferred email program has a good search function, you may consider stopping to file stuff.

After writing/co-authoring/translating three very highly regarded history books, and selling them in three languages all over the world in five figure numbers, I was dissapointed how the entry barrier to history writing did not always appear to be orientated towards writing facts, and sometimes more about pretending how complicated the whole process was.

It IS extremely difficult, but, it is NOT complicated.

If you REALLY do want to write a history book, and its keeping you awake at night, here is one method which works.

How to Write a History Book_V1-0Download

While Rocketdyne’s ownership merry-go-round kept spinning, the company’s competitors pushed forward. SpaceX and Blue Origin, backed by wealthy owners, took a fresh approach to designing rockets. Apart from the technical innovations that led to reusable rockets, these newer companies emphasized vertical integration to cut costs and minimize reliance on outside supply chains. They wanted to design and build their own rocket engines and were not interested in outsourcing propulsion. Rocketdyne’s business was—and still is—entirely focused on selling ready-made engines to customers.

The launch startups that followed in the footsteps of SpaceX and Blue Origin have largely imitated their approach to insourcing. There are at least nine medium to large liquid-fueled rocket engines in production or in advanced development in the United States today, and just one of them is from the enterprise once known as Rocketdyne: the RS-25 engine used to power the core stage of NASA’s Space Launch System (SLS) rocket. //

The RS-25 engine, by far the largest in L3Harris’ portfolio and a former Rocketdyne product, is not part of the sale. The RS-25 was initially known as the Space Shuttle Main Engine and was designed for reusability. The expendable heavy-lift SLS rocket uses four of the engines, and NASA is burning through the 16 leftover shuttle-era RS-25 engines on the first four SLS flights for the agency’s Artemis Moon program. The second SLS flight is set to launch in the coming months on a mission carrying four astronauts beyond the Moon.

L3Harris will retain total ownership of the RS-25 program. The company has a contract with NASA to build new RS-25 engines for SLS flights beyond Artemis IV. But the new RS-25s will come at an expense of about $100 million per engine, significantly more than SpaceX sells an entire launch on a Falcon 9 rocket. The engine contract is structured as a cost-plus contract, with award and incentive fees paid by the government to L3Harris.

Important news for Gmail power users: Google is dropping the feature whereby Gmail can collect mail from other email accounts over POP3.

The company hasn't exactly gone out of its way to call attention to this – like actually telling anybody anything. The news appears in a support note with a sign on the door saying "Learn about upcoming changes to Gmailify & POP in Gmail." The article itself is less euphemistic than its title: //

7 hrs
MaFt
Still working for me?
Importing from POP is still working for me. It did, however, stop just before Christmas and I had to change the settings on gMail to use TLS.

So it seems like they're stopping plain text authorisation for POP rather than ALL POP mail retrieval.

Desflurane is a common anesthetic used in hospital operating rooms worldwide. It’s also a climate super pollutant. Now, several decades after the drug was first introduced, a growing number of US hospitals have stopped using the anesthetic because of its outsized environmental impact. On January 1, the European Union went a step further, prohibiting its use in all but medically necessary cases.

Desflurane is more than 7,000 times more effective at warming the planet over a 20-year period than carbon dioxide on a pound-for-pound basis. However, curbing its use alone won’t solve climate change. The anesthetic contributes only a small fraction of total global warming, which is driven by far larger volumes of carbon dioxide and methane emissions.

Still, emissions from the drug add up. Approximately 1,000 tons of the gas are vented from hospitals and other health care facilities worldwide each year. The emissions have a near-term climate impact equivalent to the annual greenhouse gas emissions from approximately 1.6 million automobiles. //

Instead of desflurane, the Yale New Haven Health System now relies primarily on sevoflurane, an anesthetic that is 10 times less potent as a greenhouse gas and approximately half as expensive. The health care system saved $1.2 million annually on anesthesia medications after making the switch, Sherman said. //

USAP physicians and others are also using less nitrous oxide or “laughing gas,” a mild anesthetic and potent greenhouse gas. Nitrous oxide is commonly distributed throughout hospitals via a centralized, leak-prone pipe network. Pipe networks in US hospitals can leak up to 99.8 percent of the gas before it reaches patients, according to a study published in 2024 in the British Journal of Anaesthesia. Using small, portable tanks can reduce losses by 98 percent. //

A paper published in the academic journal Anesthesia & Analgesia in July argued that the climate impact of desflurane emissions was not significant and suggested that more harm may come from withholding the drug from patients. //

j5i7 Seniorius Lurkius
5y
2
As a anesthesiologist, a few points:

• Desflurane does have distinct advantages compared to sevoflurane or isoflurane. It's is faster acting, and faster to wear off. However, clinically, this doesn't matter too much if you adapt to the anesthetic you are using. But it could get a patient out of an operating room a minute or two faster. The more obese a patient, the larger a difference it could make.
• Due to its vapor pressure, Desflurane requires a powered vaporizer that uses electricity on top of its significantly higher CO2 equivilent.
• Anesthesia machines use a circle breathing system. There is no way to strictly deliver anesthetic gases only when a patient is breathing in, but you can get very close.
  Anesthetic waste gases are generally vented through a roof vent in the hospital. There are technologies out there to recapture the anesthetics, but I don't believe any are commercially common.
• A lot of nitrous is lost due to leaks in the pipes. Generally nitrous isn't that useful in anesthesia for adults, but it does have its place in pediatrics.
• You can do anesthesia without any gases and just using medications that go through an IV. These are slightly more expensive, but better from a climate perspective. However, there are medical reasons to choose inhaled gases verses IV anesthetics.
• Finally, commonly used anesthetic gases are NOT flammable. However, oxygen is a great oxidizing agent...

The Centers for Disease Control (CDC) announced Monday that it would be shaking up the recommended childhood vaccine schedule in order to bring it into alignment with those of other developed nations. As a result, the CDC will now be recommending 10 vaccines for all children, reducing by seven its prior recommendation of 17 vaccinations. //

Watt
4 hours ago edited
I ran this thru chatgpt because even the multiple links already provided by commenters don't clearly lay out the old vs the new. For children, the first 11 are still recommended. The remainder were recommended until yesterday but are now subject to "shared clinical decision making" and no longer outright recommended.

Still recommended (11)
Measles
Mumps
Rubella
Polio
Pertussis (whooping cough)
Tetanus
Diphtheria
Haemophilus influenzae type b (Hib)
Pneumococcal disease
Human papillomavirus (HPV)
Varicella (chickenpox)

Removed from universal recommendation (6)
Influenza
COVID-19
Rotavirus
Hepatitis A
Hepatitis B
Meningococcal disease

The 7th one no longer recommended is RSV. For some reason, it is sometimes counted, sometimes not (at least from what I could figure out).

Usual AI caveats... But this looks right based on the information at the other commenters' links.

Snapshots are one of the most powerful features of ZFS. A snapshot provides a read-only, point-in-time copy of the dataset. With Copy-On-Write (COW), ZFS creates snapshots fast by preserving older versions of the data on disk… Snapshots preserve disk space by recording just the differences between the current dataset and a previous version… [and] use no extra space when first created, but consume space as the blocks they reference change.

Re: The amount of times...
Hmmm, 100C is where the vapor pressure of pure water is the standard atmospheric pressure at sea level. At 1 to 1.5km of elevation, the drop in temperature at where the vapor pressure of water is equal to the ambient pressure is enough to require adjustments to recipes when baking. The more natural point for 0C would be the triple point in water. Fahrenheit's scale was 0F being the coldest achievable temperature with water ice and NaCl, with 100F being core body temperature. A real SI scale fr temperature would be eV...

For doing thermodynamic calculations, the appropriate scales are Kelvin and Rankine, and there really isn't much difference in usability between K and R as all sorts of conversions need to be done to get answers in Joules or MWHr. Another "fun" problem is dealing with speed involves Joules being watt-seconds, while vehicle speeds are usually given in statute miles, nautical miles or kilometers per hour. A fun factoid is that 1 pound of force at one statute mile per hour is equal to 2.0W (1.99W is a closer approximation).

As for feet, a fair approximation is that light travels 1 ft/nsec, too bad the foot wasn't ~1.6% shorter as a light nano-second would be the ultimate SI unit of length. The current definition of an inch, 25.4mm, was chosen in the 1920's to allow machine tools to handle inches by having a 127 tooth gear instead of a 100 tooth gear.

FWIW, Jefferson wanted to base his unit of length on a "second's" rod, i.e. e pendulum whose length would have exactly one second period when measured at seal level and 45º latitude.

Don't get me started on kilograms of thrust.

Friday 27th January 2023 06:22 GMT
IvyKing
Reply Icon
Re: The amount of times...
From somewhere in the later half of the 19th century to ~1920, the US inch was defined as 39.37 inches equals 1m. According a ca 1920 issue of Railway Mechanical Engineer, the machine tool industry was making a push to defining the inch 25.4mm so that by using a 127 tooth gear to replace a 100 tooth gear a lathe could be set up to produce metric and imperial threads.

One problem with converting the US to pure metric is that almost all land titles use feet, not meters. The US legal definition of a foot was 1/66 of a chain, a mile was 80 chains (66x80=5280), a section of land under the Northwest Ordnance of 1787 (passed under the Articles of Confederation, NOT the Constitution), which was 6400 square chains and the acre being 10 square chains (640 acres per square mile). The surveys for the Townships (36 sections) didn't really start until ca 1796, so if the arrival of the metric standards had not been delayed by the storm and the English, the US might have re-written the 1787 law to use metric measurements.

Another problem with the US converting to metric was Herbert Hoover's success as Secretary of Commerce in setting national standards for pipes and other hardware.

One final note about metric versus imperial is that a nautical mile is defined as 1 minute of longitude at the equator, so works well with the degrees, minutes and seconds customarily used for angles. Metric navigation would favor a decimal system for expressing angles, i.e. the gradians.

doublelayerSilver badge
Reply Icon
Re: The amount of times...
"Fahrenheit's scale was 0F being the coldest achievable temperature with water ice and NaCl, with 100F being core body temperature."

Wrong on both counts. On Fahrenheit's original scale, 0 was the freezing point of a solution of ammonium chloride (NH4Cl), not table salt (NaCl). As neither compound is used directly on roads, the point at which it is not useful depends on which specific salt is being used in the area, and more importantly on where the compound has been applied and whether it has been moved or not. The temperature of the human body was not 100. It was 96. Of course, neither value is considered average for body temperature (and body temperature is incredibly variable in any case, whereas boiling points of things at a specific fixed pressure is stable). This is because the modern scale abandoned both limits by instead fixing 32 and 212 as the values for water freezing and boiling, moving both of the original bounds slightly and making use of the original scale inaccurate to modern users.

Wednesday 25th January 2023 01:55 GMT
-tim
Reply Icon
Coat
Re: The amount of times...
In 1700 it was much easier for a scientist to calibrate a home made thermometer using ammonium chloride cooling bath and a docile dog. The temperature of boiling water required a barometer at higher altitudes and calibration tables. The human armpit temperature of about 96 allows hand drawn hash marks in repeated halves. Many very early Fahrenheit thermometer are often marked every 3 degrees.

Monday 23rd January 2023 15:59 GMT
Michael Wojcik
Reply Icon
Re: The amount of times...
More importantly, for Fahrenheit the reference temperatures aren't 0 and 212; they're 32 and 96. 96 minus 32 is 64. And 32 and 64 are ... stay with me here ... powers of 2.

Fahrenheit based his scale on powers of 2 so that thermometers could be graduated by successive bisection (and then reflected to extrapolate outside that range, on the assumption that the mechanism was sufficiently linear within the desired range). That's an actual engineering reason, unlike "duh humans like powers of 10". There really isn't much reason to favor Celsius.

Kelvin, of course, is the one that matters. (Yes, Rankine works too, but for some SI operations Kelvin is more convenient.)

Celsius is today as much flavor-of-the-month as Fahrenheit is. The original justifications for them are no longer relevant; they're just a matter of taste.

Re: Hooray for Avoirdupois and pounds, shillings and pence
Auvoirdepois has nothing to do with pounds, shillings and pence. Precious metals are measure using the Troy system that has 20 ounces to the pound. That is why a pound of gold weighs more than a pound of feathers. 1GBP was originally worth a pound of gold hence 20 shillings to the pound.

Try Deepl:
Reindeer length is an old unit of measurement of length used when moving reindeer. Reindeer length is the distance a reindeer can travel between (reindeer) urination breaks. Reindeer cannot urinate while running, and running too long can cause them to become paralysed. The maximum distance a reindeer can run is up to 7.5 kilometres.

Re: Try Deepl:
Nobody said they couldn't urinate while flying. That's why I stay inside on Christmas Eve.

In 1793, French scientist Joseph Dombey sailed for the newly formed United States at the request of Thomas Jefferson carrying two objects that could have changed America. He never made it, and now the US is stuck with a retro version of measurement that is unique in the modern world.

The first, a metal cylinder, was exactly one kilogram in mass. The second was a copper rod the length of a newly proposed distance measurement, the meter.

Jefferson was keen on the rationality of the metric system in the US and an avid Francophile. But Dombey's ship was blown off course, captured by English privateers (pirates with government sanction), and the scientist died on the island of Montserrat while waiting to be ransomed.

And so America is one of a handful of countries that maintains its own unique forms of weights and measures. //

When the UK settled in the Americas they brought with them a bastardized version of weights, measures and currencies. A Scottish pint, for example, was almost triple the size of an English equivalent until 1824, which speaks volumes about the drinking culture north of the border.

British measurements were initially standardized in the UK's colonies, but it was a curious system, taking in Roman, Frankish, and frankly bizarre additions. Until 1971, in the UK a pound consisted of 240 pence, with 12 pence to the shilling and 20 shillings to the pound. //

The French government felt that the newly formed nation wasn't being supportive enough in helping Gallic forces fight the British in the largely European War of the First Coalition. In something of a hissy fit, the French government declined to invite representatives from the US to the international gathering at Paris in 1798-99 that set the initial standards for the metric system.

Jefferson's plans were kicked into committee and while a form of standardization based on pounds and ounces was approved by the House, the Senate declined to rule on the matter.

Mostly you don't see a difference, unless you are using set -u:

/home/user1> var=""
/home/user1> echo $var

/home/user1> set -u
/home/user1> echo $var

/home/user1> unset var
/home/user1> echo $var
-bash: var: unbound variable

So really, it depends on how you are going to test the variable.

I will add that my preferred way of testing if it is set is:

[[ -n $var ]]  # True if the length of $var is non-zero

or

[[ -z $var ]]  # True if zero length

rrsync is designed to be used as a forced command for a particular key, so it should be exactly what you want.

A forced command is set up using the command option for a key in an authorized keys file and is then always run whenever this key is used for authentication, no matter what command the client requested. But it has access to the requested command so it can for example implement a validated, restricted version of it and that's what rrsync does.

You use it like this:

command="/path/to/rrsync -wo /allowed/directory/",restrict,from="a.b.c.d" ecdsa-sha2-nistp521 AAAAE...

Access for this key is limited to rsync to the /allowed/directory/ only. The -wo (write only) option means that rsync will be only allowed to send to the remote machine, -ro would only allow reading from the remote system, giving no option would allow transfer in both directions.

On the local side when you give arguments to rsync you must give the remote path relative to the allowed directory, so on A you would do eg.rsync -options /local/path root@B: and not rsync -options /local/path root@B:/allowed/directory/.

See also https://serverfault.com/a/915842/117645

Servers on exaroton don't have a fixed monthly price. You are only charged for the time you actually use your server.

To pay for services on exaroton, you use credits, each of which is worth €0.01. After creating your account, you get 5 credits for free to test our service. //

Running a server on exaroton costs 1 credit per GB of RAM per hour. For example, if you select 4 gigabytes of RAM for your server and run it for 1 hour, you would pay 4 credits. You can choose how much RAM (2 GB to 16 GB) you want to assign to your server on the Options page. //

To save credits, it is recommended only to run your server when somebody is playing on it. To achieve this, exaroton provides you with an AutoStop feature to automatically shut down your server when it has been empty for a while and an AutoStart feature to start your server automatically as soon as somebody tries to join.

Both features can be enabled for free on the Options page. We will only charge you for the time your server is actually running.

To go along with that recent CETP trial news, here's another one for the "We don't know much about human lipid handing" file. A dietary study originally done back in the 1960s and 1970s has been (almost literally) resurrected, with data pulled out of yellowing stacks of paper, old cardboard boxes, and ancient-format computer tapes.
What it shows is that, under about the most controlled conditions possible in a large human trial (institutionalized patients being served standard meals), that replacing saturated/animal fat in the diet with vegetable-derived fats and oils provided. . .no cardiovascular benefit whatsoever. In fact, the lower the cholesterol levels of the patients, the higher their death rates. This was in over 9,000 subjects over five years, probably the largest study of its kind ever conducted, and it had only produced one (not very thorough) paper in 1989 that didn't make much of an impression. ///

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McCullough says that it was Washington and his army that won the war for American independence. “He was not a brilliant strategist or tactician, not a gifted orator, not an intellectual. At several crucial moments he had shown marked indecisiveness. He had made serious mistakes in judgment. But experience had been his great teacher from boyhood, and in this his greatest test, he learned steadily from experience. Above all, Washington never forgot what was at stake and he never gave up.” Without Washington, there would be no America.

There are many things to celebrate during our nation’s semiquincentennial celebrations, and many men to honor for their part in our country’s birth: Thomas Jefferson, John Adams, Alexander Hamilton, Benjamin Franklin, and John Hancock among them. But no one looms larger than George Washington, who today seems almost mythical. At Washington’s funeral, Henry “Light-Horse Harry” Lee famously eulogized Washington as, “first in war, first in peace, and first in the hearts of his countrymen.” In 2026, it is our duty to ensure that honorific remains as true as when it was first spoken.

A pizza place near the Pentagon received an unusual rush in orders just an hour after the US launched its attack on Venezuela. //

That would be 3 a.m. in Caracas, one hour after the US rained down airstrikes on the capital city that lasted less than 30 minutes. //

The Pentagon Pizza theory follows pizza orders surrounding the Pentagon, speculating that an increase in late nights orders for federal agents corresponds with major historical events.

In the past 20 years, there have been only nine anthrax cases in the US.

However, B. anthracis is part of the larger Bacillus cereus group, which also includes B. cereus and B. tropicus, a newly recognized species. And these species can also carry and produce anthrax toxins. Both can be found in soils, and B. cereus is considered ubiquitous in the environment.

In 2022, CDC researchers found an unexpected pattern. Since 1997, there had been seven cases of infections from Bacillus group bacteria producing the anthrax toxin—all in metalworkers. Six of the seven were welders, hence the term “welder’s anthrax,” with the remaining case in a person working in a foundry grinding metal. Of the six cases where a specific Bacillus species was identified, B. tropicus was the culprit, including in the newly reported case.

Speculating risks
It’s unclear why metalworkers, and welders specifically, are uniquely vulnerable to this infection. In their 2022 report making the connection, CDC experts speculated that it may be a combination of having weakened immune responses in the lungs after inhaling toxic metal fumes and gases created during metalwork, and having increased exposure to the deadly germs in their workplaces. //

Environmental sampling of his workplace found anthrax-toxin-producing Bacillus in 28 of 254 spot samples. //

The experts also speculated that iron exposure could play a role. Bacillus bacteria need iron to live and thrive, and metalworkers can build up excess iron levels in their respiratory system during their work. Iron overload could create the perfect environment for bacterial infection. In the teen’s case, he was working with carbon steel and low-hydrogen carbon steel electrodes.

For now, the precise risk factors and why the healthy teen—and not anyone else in his workplace—fell ill remain unknown. CDC and state officials recommended changes to the workplace to protect metalworkers’ health, including better use of respirators, ventilation, and dust control.

23 hrs
volsano
One Y2K remediation I worked on had systems from the 1960s -- crucial systems that ran the whole show.

We easily (for some definitions of the word) fixed their 1980s and 1990s stuff that used 2-digit years.

But we did not touch the 1960s and 1970s stuff that had a specialised date storage format. It was 16-bit dates. 7 bits for year. 9 bits for day of year.

It was too assemblery, too unstructured, too ancient.

And, anyway, 9-bit year counting from 1900 (as they did) was good until the unimaginably far future.

The unimaginably far future is nearly with us: 1900 + 127 = 2027.

I am waiting for the phone to ring so I can apologise, - and quote them an unimaginably large number to finish the job.