hey combine hydrogen from with carbon dioxide,

Hydrogen from what or where?
If, like almost all *industrial* hydrogen, it comes from cracking natural gas, that's as something pure magenta (whatever the complimentary colour to green is).
(Our "analytical grade" hydrogen was probably sourced from electrolysis - certainly when we made it on site, it was ; but that was substantial cost of equipment and maintenance time. Our systems really cared about contaminants at the part-per-million level.)

Also, anything sounds big when you put it in gallons. Doesn't sound so big when you mention that's 92 acre feet, the amount used by less than 20 acres / 8 hectares of alfalfa per year. Or when you mention that a typical *closed loop* 1GW nuclear reactor uses 6-20 billion gallons of cooling water per year (once-through uses 200-500 billion gallons, though most of that is returned, whereas closed loop evaporates it)

I don't think it has anything to do with that. As soon as I saw the headline, my mind went "cohort study". And sure enough, yeah, it's a cohort study. Remember that big thing about how wine improves your health, and then it turned out to just be that people who drink wine tend to be wealthier and thus have better health outcomes? And also, the "sick quitter" effect, where people who are in worse health would tend to stop drinking, so you ended up with extra sick people in the non-wine group? Same sort of thing. This study says they're controlling for a wide range of factors, but I'd put money on it just being the same sort of spurious correlations.

"I just put my models on a usb drive then plug said drive into the printer."

You must have a lot of spare time on your hands.

"It works great locally" - Um, no it doesn't?

They've made a nice easy-to-use ecosystem. For $400 you can get a P1S that supports adding an AMS, auto bed leveling, enclosed-chamber printing, high precision, high print speeds, and 300/100C nozzle/plate temps, and has an easy cloud print service and a robust ecosystem of models you can just download and print with no extra config straight from the app.

But yeah, their behavior is increasingly entering bad-actor territory. I wonder how long it'll be before they lock entry-level printers into their branded filament?

Yeah, and the person who released the information first was operating in an "if I noticed this, doing only as much as I'm doing, surely attackers would also notice" mode. Possibly some patches these days are sufficiently obvious as to their correctness and also effect that they should first become public as a set of stable releases. This was a kind of special case, as CopyFail was the combination of some code doing something strange with one user not being prepared for it, and fixed the user. If there are other users that also aren't prepared, fixing them isn't going to be subtle.

How shadows and reflections move when you're 10 milies from a mostly flat surface a thousand miles across is legitimately hard to analyze for a visual system that evolved on the ground, especially if you throw in small periodic surface orientation variations. Given how complicated it is to explain rare rainbow-related phenomena like sun dogs, it would be surprising if we'd identified and explained everything that can appear when flying above the ocean.

While you're at it, you also need to block installing esp4, esp6, and rxrpc, for, y'know, reasons.

A propos not a lot - my BOINC installation of "Asteroids@Home" has just started kicking through computations for the first time in ages. (BOINC is an indirect descendent of the SETI@Home project, generalised for a variety of distributable computation projects ; Asteroids@Home is a project that "uses power of volunteers' computers to solve the lightcurve inversion problem for many asteroids." Lightcurves are brightness versus time ; once you correct for distance asteroid to Sun and asteroid to Earth, the cross-section illuminated and rotation speed drop out - after considerable maths.

Probably someone has posted a new batch of data on something's light curve, and the rotation speed and/ or shape model is being re-analysed.

It's a small contribution.

I just find it absurd to demote Pluto to a non planet and then classify other climbs as Plutino, is pretty inconsistent.

IIRC, the term "plutino" was being used *before* the 2006 (?) IAU definition. Cart and horse sequence race condition.

But then again: you could call them Neptino, or something, or? And Pluto would be a Neptino,too.

There are bodies in a 3:2 resonance with Neptune. And other bodies in a 5:3 resonance (while 6:3 or 3:1 resonances are relatively empty : see "Kirkwood gaps" in the asteroid belt - same physics, different dominant body (Jupiter) and swarm of "test particles". And other bodies in 7:2 resonances. I can't remember the name of such a body (and can't be bothered to research it) so in keeping with other cartoon dogs, let's consider this to have a largest member "Scooby" and call these "scoobinos" (it's a class, not a proper noun, so no capitalisation).

By your naming convention, these too would be called "neptinos" (no capital), with no distinction from the 3:2 "peptinos" generally known as "plutinos". By the naming convention I describe, and which is actually being used, "plutinos" are a distinct (if related) class to "scoobinos".

It's a nomenclature - it's intended to describe meaningful (to a certain class of people, KBO astronmers, for example) differences in a compact, memorable manner.

The previous posts were about periods. You seemed to shift to considering orbital velocities (or speeds ; it's not precisely clear), which is a different thing.

Yes, the tie to the period of Neptune's orbit should also constrain the period of the Plutinos over a suitable averaging period. But when you get to things like "tadpole" and "horseshoe" orbits, that can have significant variations of order-of a percent in period, resulting in the longitude of perihelion (direction of perihelion of the orbit, measured from the Sun) of the Plutino oscillating around the longitude of aphelion (parallel meaning) of Neptune's orbit, and tracing out a "horseshoe" shape (when projected in a co-moving frame with Neptune's orbit) or a tadpole shape. Which means variations in the orbital speed of up to a percent or so and the Plutino moving ahead in it's orbit compared to Neptune, then falling behind. Over some hundreds of orbits (10s of thousands of terrestrial years) the orbital speeds will average out, but there are enough wrinkles to be interesting.

I learned about these wrinkles in orbital mechanics in the mid-90s, when I got a phone line and dial-up internet access, and heard about an object called Cruithne (good grief - it's a 4-digit UID ; I feel old). Just because the physics are simple, doesn't mean the results are simple.

it should take longer than Pluto to complete an orbit but instead it takes a year or two less.

That would be about a 0.5% variation. The perihelion of (I've forgotten the object's name ; doesn't matter ; let's call it "Goofy" because it's not Pluto) the orbit will be reached sooner than Pluto's perihelion, which also means that Neptune's aphelion (they're in a 3:2 relationship, remember) is relatively close to Goofy. Which means there will be a decelerating force on Goofy's orbit (Neptune is the dog, not the tail. Billions of fold difference in in momentum.) reducing it's orbital speed in comparison to Pluto's orbital speed. Which will mean that Goofy starts to fall back in it's orbit compared to Pluto. Yes, that's cyclic. And no, there probably aren't enough counteracting torques for other objects to damp down the motion. (In the Earth - (3753)Cruithne system, all involved bodies experience torques form Venus, Mars and Jupiter of roughly similar magnitudes, which will damp the motion eventually. Or result in an orbital interaction which will put (3753)Cruithne into an Earth-crossing, Venus-crossing, or Mars-crossing orbit, when bad things become much more likely.

Yeah, it gives me a headache too. You remind me, I was trying to help a guy who runs an orbital simulator code set to write a manual for it. It is very headache-inducing. And I don't understand it well either.

What is Tony's tool called ? Orbit Simulator (though the internal scars on the software say it was "Gravity Simulator" in an earlier life.) - which s interesting to play with. But the help files aren't great. It's a complex tool for simulating a complex system.

Did you miss the phrase "reproductively isolated"? I specifically typed and spell-checked those letters so that you could ignore them and their import. I'm glad to see that you did, indeed, ignore a vitally important part of the point I was making.

Your citation that there are several other strains to be found in our genomes also means by definition that these strains were not reproductively isolated from our (strain, species, lumpy splits or splitty lumps?) of apes.

My training was in considering "species" as a morphological concept ("genetics was for the Zoology department on a different campus, not for Geology students), but even then, in the mid-80s, we were well aware that we could be splitting (for example) a sexually dimorphic species into two, and also had to pay attention to "provincialism" (morphological variations between members of the same species in different regions) as a possibility when considering whether to "lump" two specimens into one species, or split them into two. An introductory lab exercise was "Here are boxes each containing a couple of hundred fossils per group of 4 - divide yourselves appropriately - all from the same bed in the same quarry. (Mid-Jurassic, for what it's worth.) Without consulting your text books, and without discussing between groups, assess the number of species in each collection." Which is applying the morphological species concept in a laboratory setting.

At that time, we had no anticipation that archaeology (verging on the closest shores of palaeontology) would ever get access to genetic information. That is why it literally wasn't on the curriculum. Though my home area was watching the application of "DNA fingerprinting" to a couple of local rape cases - you may have heard of the developments in this since. This "genetics" thing was of some importance, if of no relevance to palaeontology.

3 Species are considered proven, Homo Sapiens, Home Neanderthalis and Denisovans.

That very question is the point - are they 3 species, or one species with regional variation? Yes, I did see the claim that the skull assigned to Homo longi, and I said at the time that "that is going to be a beautiful argument point between the morphological species concept and the genetic species concept. That is going to be in textbooks for generations." As, indeed, you are proving.

Where, in the published formal literature, do you see an assertion that "this genome and this (these) body fossil(s) are the holotype(s) for a species which we are erecting called Homo denisova spec.nov. ..." Because that is what "declaring a new species requires" - a holotype, a description (emphasising differentiation from pre-existing similar species) and a unique species name. (Assignment to a genus is common, but not required ; assignment to a new genus is rarer, but still common ; all higher taxonomic levels are matters of debate and opinion, and get revised on a regular basis. Which is why you generally cite whose definition (of what date ; people change their opinions with new evidence) you are using for any particular higher-level taxonomy.) [People sometimes re-use species names, but try to keep them unique within a taxonomic branch. But it's not good practice. And with search engines, it is pointless these-decades. there is no shortage of words available, even if your linguistics are lacking.]

When the Denisova genome was detected and announced, the authors (Paabo and associates, IIRC) explicitly stated that they were not asserting a new species. Which is why, if the association between the Homo Longhi body fossil and the genomes from Denisova (and several other sites, plus modern SE Asian populations) is accepted, then it is the Homo Longhi name that the genome will be attached to. The genomic data was uploaded to Genebank, MolbioBank, or something similar. I'm not sure that genetics has got to the point of having rulebooks as comprehensive as the ICZN and the botanists. Since it's pushing a century that the ICZN have had a rulebook, maybe now would be a suitable time for the geneticists to get their databases and practices into some sort of rulebook. IANAgeneticist ; they might have done so already.

Has someone been putting something in the water? That's the second 4-digit UID I've seen in the last few days - and I've barely touched the Slash for months.

'non planet' is called a 'Plutoist'?

To quote the paper's Abstract (becasue I haven't got to reading the body yet ; nobody has raised a point that has needed me to read that far, yet :

A stellar occultation by the ~ 250-km-radius plutino (612533) 2002 XV93 on

And :

Our findings indicate that a fraction of distant icy minor planets can exhibit atmospheres possibly caused by ongoing cryovolcanic activity or a recent impact event of a small icy object.

This is a "small icy object" (they don't even waste consideration on it being a "dwarf planet" or not ; it's probably not particularly spherical, but with only 2 chords and a non-chord, it's hard to say what the actual profile is) which has a "plutino" class of orbit (meaning : 3:2 orbital resonance with Neptune).

Oh, it's you, Angel ; I don't remember you being a particularly "Pluto is Planet IX" obsessive. Or are you just prodding the hornet's nest to elicit amusing buzzing sounds ?