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Injured green sea turtle relearns how to swim thanks to 3D-printed harness
Boat collision left Charlotte stranded at the surface and in danger of predation.
arstechnica.com/science/2024/1…

in reply to Mark B Tomlinson

Intriguing as always, and your renderings are getting better and better! 👍


is anyone able to point me to any #linux distros that support armv5 processors?



The Importance of Pipelines in Complex UNIX Data Interpretations

Pipelines are a foundational feature of UNIX systems, enabling the seamless flow of data between programs. This capability lies at the heart of UNIX philosophy, emphasizing modularity, simplicity, and the use of small, reusable programs that perform specific tasks well.

Read More: machaddr.substack.com/p/the-im…

#Linux #UNIX #Computer #Science #Command #Line #OpenSource #pipeline

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With the feature code freeze continuing, the Wine team had put up a third Release Candidate for the upcoming stable main release of Wine 10.0 coming in early 2025.
gamingonlinux.com/2024/12/wind…

#OpenSource #Wine #NewRelease #Misc



My 2025 project is to work on my new Linux computer with more open source softwares, and reduce my addiction to Photoshop. Which is gonna be tough let's be honest 😅

#linux #opensource





From a chronically moisturized baby hippo to Trump’s bloody ear and the glorification of Luigi Mangione, nothing was off limits this year.
#BestMemes2024
hyperallergic.com/973911/the-b…


And we're done! I need to do some light sanding to tidy up the edges, but I'm pretty pleased with how these turned out. I'm going to leave it up to the recipient to decide how to decorate them. 3D model available here, including the #FreeCad source: printables.com/model/1115339-t… #Christmas #Tagalog #Welsh #3Dmodelling #3dprinting #cnc #hobbycnc 🏴󠁧󠁢󠁷󠁬󠁳󠁿🇵🇭
This entry was edited (3 months ago)


On this #FreeCADFriday, I’m using the #Gridfinity and Part Design workbenches to make some screwdriver trays for my toolbox. The cool thing about these is that the cutout shape is the same between trays, but I only have to tweak the dimensions for each specific screwdriver. (All of mine are different)

I also made one to hold a hex bit holder that I designed and printed a few years ago. That one is a half-width tray because I have a half row at one end of my toolbox drawer.




Here is part of a CIA map of Libya - I'm using it because it's public domain. It comes from here:

loc.getarchive.net/media/libya

(A Library of Congress site with public domain maps. Can be a handy resource! The Schiaparelli map was from Wikimedia Commons.)

Surt, Sidra - they are forms of the latin name Syrtis, a marsh, and Syrtis Major was a large marshy area along the coast here. So it is a place on Earth like the others. Are all those names from Earth? #maps #Mars

in reply to Phil Stooke

Elysium... it's not a real place unless you are enjoying a trip to Paris. It is supposed to be in the very far west, so its position out beyond the Mediterranean places, Greece and Syrtis Major, is not too inconsistent with this scheme. #maps #Mars
in reply to Phil Stooke

I find this one particularly satisfying. Where is Tharsis on Earth? The vast volcanic province is so far west that it slipped around the end of the Mars map and appears on the right, not far from Solis Lacus. On Earth it's outside the Pillars of Hercules (look back at the Schiaparelli map to see the Pillars of Hercules named in Latin) - at Tartessus, the Rio Tinto area mined since antiquity and also an analog for the acidic waters of Meridiani Planum. Amazing how things tie together! #maps #Mars
in reply to Phil Stooke

irrelevant nitpick, but people from Huelva (onubenses) may get offended if you pin Rio Tinto to their adjacent province of Cádiz instead 😉

en.m.wikipedia.org/wiki/Provin…

en.m.wikipedia.org/wiki/Tharsi…

This entry was edited (3 months ago)
in reply to V Martín

@sharponlooker Good point! I was just combining places in that area without thinking about the provinces.
in reply to Phil Stooke

Now for a bit of Egyptology. Here are some names associated with the River Nile. They form a string of small dark markings near the northern end of Syrtis Major (bottom in this south-up map of Mars. The modern placenames are all clusters of hills and small plateau structures. #maps #Mars
in reply to Phil Stooke

Another one not far from the Perseverance landing site in Jezero crater. Nili Fossae are a set of long, wide faulted valleys partially encircling Isidis Planitia and associated with the Isidis impact basin. The floor of one of the valleys was considered as a landing site for both Curiosity and Perseverance. #maps #Mars
in reply to Phil Stooke

With all those Nile references, it should not come as a surprise that Egypt is here as well. Isidis - the land of Isis - is Egypt. The Egyptian deity Isis was adopted to form a widespread cult among Romans, reaching even to that distant outpost Britain. Isidis is an ancient impact basin filled with sediments. Every year in about 1985-1995, Heinz-Peter Jöns was a fixture at LPSC promoting the idea of aqueous sediments in Isidis, and eventually people caught up with him. #maps #Mars
in reply to Phil Stooke

This one really does not fit the pattern. Acidalia is a dark area north of Chryse, where Viking 1 and Pathfinder landed. It's a smooth low-lying plain so its modern name is Acidalia Planitia. Its location on Mars should correspond with India (Ganges, which we saw earlier, is nearby), but actually Acidalia is in Greece. You can hardly expect an exact correspondence between the two planets. #maps #Mars
in reply to Phil Stooke

Argyre is a large impact basin south of the Valles Marineris. The name refers to a legendary source of silver in or near Burma (AKA Myanmar). The longitudes fit Schiaparelli's scheme quite well. Latitudes, not so much. #maps #Mars
in reply to Phil Stooke

Just to the west of Meridiani is Margaritifer Terra, Margaritifer Sinus in old maps. It's a place on Earth too, around the southern tip of India (not very well portrayed by Ptolemy), and it means the place of pearls. The region was famous for its pearls and still is.
in reply to Phil Stooke

Today, the last 3 places in my Mars names story. We start with Arcadia, a poor rocky land in southern Greece where shepherds lived a hard life but were said by city folk to be carefree and innocent compared with the corrupt inhabitants of the cities. Poussin's painting shows shepherds reading an inscription on a tomb: Et in Arcadia Ego (roughly 'I (death) am also (or even) in Arcadia'. The line has become famous from Dan Brown's 'Da Vinci Code' and its curious precursors. #maps #Mars #Arcadia
in reply to Phil Stooke

Next, Utopia, where Viking 2 landed in 1976. Unlike all those other names, this is not ancient and comes from Thomas More's book of 1516. It literally means 'nowhere' and is used for a perfect place or society (maybe so perfect it couldn't really exist). In the book it was an island out in the Atlantic near the Americas.This name is not on Schiaparelli's map and probably comes from Flammarion and Antoniadi's map of 1900. #maps #Mars
in reply to Phil Stooke

Finally - Amazonis. The name makes us think of the Amazon in Brazil, but originally it was the name of a female warrior society whose tales crop up all over the place in classical contexts. Amazons fought on the side of Troy in the Trojan war and are usually associated with northern Turkey.

OK, enough names. Now we will return to our sequence of Mars maps. #maps #Mars

in reply to Phil Stooke

After that rather long excursus into Martian nomenclature we return to the sequence of Mars maps. Looking back, we saw maps of light and dark markings, at first barely glimpsed through telescopes, but evolving into quite sophisticated drawings - Green's map is quite realistic though others seem more sketchy. Schiaparelli saw lines ('canali') and Proctor rendered them as rivers. From 1890 to about 1930 many maps showed canals, which we now discount. #maps #Mars
in reply to Phil Stooke

In the middle of the 20th Century canals had fallen into disfavour. Typical maps of the 1950s, such as the International Astronomical Union (IAU) map drawn by Glauco de Mottoni y Palacios in 1957 as a key to official nomenclature, showed broad light and dark areas similar to Green's map. Here it is stripped of names (by cloning) and transformed to my common projection. Nothing suggesting topography or geology is visible. Don't be fooled by assertions that some people saw craters. #maps #Mars
in reply to Phil Stooke

That last map was drawn in the year of Sputnik. Direct exploration by spacecraft was not far off, so NASA needed a new map. The job went to the US Army and Air Force, who both had large mapping agencies and were gearing up for Moon mapping. I will show the Air Force map. You can see it here:

lpi.usra.edu/resources/mars_ma…

Look at that - it has canals! So did the less aesthetically pleasing Army maps. It's a curious footnote of Mars mapping history. #maps #Mars

in reply to Phil Stooke

Here I add my manipulated version of it for easier comparison with the others. Look at the original - it's north up, not south up. The old astronomical convention was dropped. Longitudes go from 0 to 180 east and west from the prime meridian (still using the 1840 version of zero longitude). Our familiar names are on display. Compare Syrtis Major's longitude here and on the previous map - this one is 10 degrees too far east. Oops! #maps #Mars
in reply to Phil Stooke

I made this version of the map for early Mars exploration mapping in my first Mars atlas. But pretty soon the first spacecraft exploration of Mars began, and sure enough, new maps would be needed yet again... tomorrow!
in reply to Phil Stooke

I mis-spoke there - we don't see a new map right now, but new things. This map, with the old Air Force map as a base, shows the locations of the Mariner 4 images taken in 1965. We take this for granted today but the idea that you could build a machine and send it to Mars, and get pictures of its surface back was unbelievably audacious at the time. There were a few extra frames but they crossed the terminator and showed nothing. How did I know where to put those images? #maps #Mars #Mariner4
in reply to Phil Stooke

I positioned the images like this. Using a modern map as a background, I matched each Mariner 4 image to surface features. At the time this was impossible, In fact the bright markings in the top image (frame 1) were thought to be clouds, but my comparison shows every one is a real surface feature. Compare with this contemporary map (this time on the US Army base map). It shows #1 reaching nearly to 50 north, but it really gets only to 30 north.

planetary.s3.amazonaws.com/web…

#maps #Mars #Mariner 4

in reply to Phil Stooke

Here is another section of the Mariner 4 image sequence with pictures located on a modern map. The previous 6 images were taken with high sun and in an area of fairly bland landscapes (at this resolution), but here we get recognizable craters. Some are named after explorers (before they became unfashionable). Mariner itself gets a crater named after it.
#maps #Mars #Mariner4
This entry was edited (2 months ago)
in reply to Phil Stooke

The last of these Mariner 4 maps with image locations, curving towards the terminator and becoming very low contrast and hard to interpret. A few remaining images are not shown - they can't be located like this, only roughly based on pointing data. See the crater named after Peter Millman - my PhD external examiner 36 years ago. And see the Mars 3 landing site... it was targeted using these images. The USSR's Mars 2 and 3 were sent to Mars before Mariner 9 mapped the planet... #maps #Mars
in reply to Phil Stooke

Mars 2 and 3 had to target the southern mid-latitudes, but the only knowledge of the surface at 45 south was from Mariner 7 images of the Hellas area and these Mariner 4 images. So Mars 2 went to Hellas, which looked very smooth in Mariner 7 images (because Hellas was cloudy, not smooth). It crashed. Mars 3 went to a smooth area just southeast of Newton crater, the safest-looking area in this latitude. It landed nearby and began to operate but ceased after about 20 seconds. #maps #Mars
in reply to Phil Stooke

Those were my maps for Mariner 4. What did maps look like at the time? The US Air Force made maps of the image pairs, and 4 of them are here:

nssdc.gsfc.nasa.gov/imgcat/htm…

A person usually associated with Pluto - Clyde Tombaugh - also mapped Mars and made a special map of the Mariner 4 target area. It's here:

nmsu.contentdm.oclc.org/digita…

South is at the top. He maps canals using an idea of the time: they are cracks made by impacts, so he maps craters at intersections (oases). #maps #Mars

in reply to Phil Stooke

Here is my version of Tombaugh's map. North is up here. Needless to say the canals are not in Mariner 4 images and the craters are not where he surmised they might be. But one crater in that area was named after Tombaugh and I show its location. Mariner 4 showed a cratered Mars, a bit of a let-down for people who hoped for something less moon-like. They had to wait a bit longer to see 'the gates of the wonder-world open' in Carl Sagan's words. #maps #Mars
in reply to Phil Stooke

Mariner 4 took its pictures in 1965. Four years later, only about a week after Apollo 11, a new flyby produced a much better imaging dataset. This was Mariner 6. It viewed the entire planet during a full rotation as it approached, and took a strip of images along 30% of the equator. The best images showed lots of craters again, but earlier views, oblique and with the Sun overhead, were hard to interpret. Too bad, because they showed parts of the giant canyon system and big valleys. #Mars
#Mars
in reply to Phil Stooke

Here's my map of the results - just for Mariner 6, but as a bonus the Mariner 4 images are also shown. We'll see Mariner 7 tomorrow. The map, in 2 hemispheres, shows the far encounter images of the whole planet except the far north (which was in winter darkness), and the close encounter images are superimposed. The distant images still don't show craters etc. This was how Mars mapping stood until... a week later. #maps #Mars
in reply to Phil Stooke

Mariner 7 flew past Mars a few days after Mariner 6 and repeated its observations. Its far encounter images were taken closer to Mars and showed finer details, including craters near Syrtis Major. The close encounter images started at Meridiani, already seen quite well by Mariner 6. Why look at that area again? To look for changes, though I don't think any were seen. They progressed south into Noachis and then across Hellas, showing it to be featureless (because it was cloudy/dusty). #Mars
#Mars
in reply to Phil Stooke

Here is my composite map combining Mariners 4, 6 and 7. This was the state of knowledge of the planet until Mariner 9 changed everything. These early missions showed mainly cratered areas, with potentially more interesting areas only seen with high sun and more distant oblique viewing. The occultation points were important - the radio signal passed through the atmosphere giving a temperature-pressure profile. Mariner 4 did this too. #maps #Mars
in reply to Phil Stooke

A few extras for Mariners 6 and 7. First a closer view of the Mariner 6 images. The small white boxes are locations of high resolution frames. #maps #Mars
in reply to Phil Stooke

And the same for Mariner 7, in two panels. The top one shows images in the Meridiani and Hellas regions, the lower map shows the south polar cap. The Mars 2 impact site is shown - its target was chosen using these images in apparently smooth Hellas. #maps #Mars
in reply to Phil Stooke

The Mariner 6 and 7 cameras were not the only instruments to provide interesting information on the surface of Mars. A UV instrument made atmospheric measurements, among them an estimate of surface pressure which can be used to estimate topography (high elevation means low pressure). This map shows estimates of topography along tracks made during the close encounter. Knowledge of topography was still rudimentary. #maps #Mars.
in reply to Phil Stooke

mind-blown! I went and searched for more info, this page gave some hints
nssdc.gsfc.nasa.gov/nmc/experi…

but it wasn't enough, found this paper too to read later
lasp.colorado.edu/pdr/mariner9…

Maybe there are better ones?

I'm guessing the Martian weather was negligible to affect the topographic profiles?

in reply to V Martín

(I know, these are Mariner 9, but I wasn't aware one could do topographic profiles with UV measurings 😉 )

This text from the above paper makes it click for me. Also attach a couple good figures there.

From Hord et al. "Mariner 9 Ultraviolet Spectrometer Experiment: Photometry and Topography of Mars"
lasp.colorado.edu/pdr/mariner9…

This entry was edited (2 months ago)

V Martín reshared this.



How do you do, fellow web developers? A growing disconnect.
rakhim.exotext.com/web-develop…

<- programmers increasingly don't know how programs work, or that there is a web that doesn't involve Javascript frameworks.

Apparently.

in reply to lproven

My two favorite interview answers I got a while ago:

- What is the complexity of this algorithm?
- Um, I see no complexity, it's quite straightforward.

And:
- On what protocol level ports are implemented? [asked in the middle of a talk about HTTP]
- Not sure, I think USB?

Those people were not joking, and I'm sure they also weren't dumb, but I still can't get used to the context gap that I have with many people with web development background.

This entry was edited (3 months ago)

lproven reshared this.



Copy editor desperately needed...

Article refers to people living in a city "75 miles west of Los Angeles"... Uhh.

in reply to Dan Gillmor

given how far north Los Angeles city limits are in the San Fernando valley, I think it's completely valid.

in reply to no_nothing

rick and morty said it best for me:

your boos mean nothing to me; i've seen what make you cheer!


it works well in the realm of politics because now centrists are a-okay with genocide so long as they believe that the other guy is going to genocide harder.

This entry was edited (3 months ago)