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The Russian armed forces are expanding the buffer zone around the city of Volchansk in the Kharkov Region to prevent the Ukrainian military from strikes on Russia's Belgorod Region, Vitaly Ganchev, the head of the Russian administration in the Kharko…
Its easy to be exasperated with the people who appear to have only just figured out that killing 17,000 children is not cool and not self-defence. I have expressed some of that exasperation.
But here is Prof Alison Phipps @alisonphipps with a timely reminder that we need these converts. It's how we win.
Eleanor Duckworth: The more intensely interested a teacher is in a student’s thinking, the more interested the student becomes in his or her own thinking. Corollary: The more a teacher just wants to see right answers, the less interested students become in their (or any) thinking.
Noted progressive educator Eleanor Duckworth worked with eminent Swiss psychologist Jean Piaget early in her career. "I learned that you can't change what ch...
I'm interested in the idea of building rigid high strength frames, for example for a lathe or milling machine frame, by burning out shapes in plate steel on a CNC plasma cutter, then assembling those plates with 3d printed support jigs holding them together and bolting through them with long bolts. Then pour the interior with concrete and after the concrete sets up, tension the bolts to prestress the concrete...
It's a bit limited in shape, you can't really include the type of features you see in cast iron, but machine bases typically don't need them that much.
When you're attaching a component to the base which needs precise orientation, you attach it to a jig which holds it true, then you bring the bed up to it and you epoxy the mating surfaces so the epoxy acts as a shim. After the epoxy hardens you can tension the hold-down bolts.
I realize that there's a general purpose way to make a high precision surface on something:
1. Lay a piece of surface ground steel, maybe 3-5mm thick, down on a surface plate. This steel must have a smooth finish but it does NOT need to be precise in any way.
2. Tape around the perimeter of the steel with vacuum tape and attach a vacuum hose on one corner.
3. Start the vacuum pump, sucking out all of the air between the steel and the surface plate. At this point, the vacuum will flex the steel, making it conform to the surface plate.
4. Take any old rigid piece of steel, stone, or concrete, paint it with epoxy, and stick it to the exposed surface of the steel.
5. After the epoxy hardens, release the vacuum and cut the tape free.
At this point, you have a high precision surface that has been twinned to the surface plate. The epoxy has hardened in the form of a "perfect shim" between the rigid body of the part, and the strip or plate of steel.
Problem with the above is you don't know how uneven the part is that you're sticking to, too uneven and there's not enough epoxy to fill the gap and you get a void.
A related concern is if too much epoxy is painted in places to fill up the voids, the thick areas will be subject to more shrinkage than the thin areas. Epoxy glues shrink by 0.1 - 3% depending on the type.
Two thoughts come to mind:
1. This process can be done using tinfoil, and then you can hit it with a wire brush to scrape out all of the voids since unbacked tinfoil will tear out instantly. Then the process can be repeated again with a little bit of extra epoxy painted in the void areas. When the entire surface comes up with no voids, then you do the final mating with sheet metal.
2. A related idea is to pour concrete down against the sheet metal on the surface plate. This will have more uniform shrinkage so voids should be less of an issue.
In the flooring business, they use a very liquid cement that is self-leveling, they dam it up and then pour it in, and then it will naturally level to perfectly flat and even.
That could be replicated into something else by just using a very watery epoxy. Something with a very low surface tension.
That'll work for making something like a table, but when we're talking about precision, things get "weird"...
The thickness of a human hair is about 2 thousandths of an inch. Paper is 4 thousandths, a laboratory grade surface plate is guaranteed flat and true to 0.045 thousandths.
When you get to these precision levels, you can put a 1/2 inch piece of steel under a measuring instrument and watch it flex as you push it lightly with your finger. You can hold a part in your hand and see it expand from your body heat in real time. Pouring even the thinnest epoxy and letting it cure in air might get you down to 1 thousandth, but you can get that by purchasing a piece of bar stock and making a simple surface grinder.
Surface plates are made on very high precision surface grinders, those grinders are themselves made using master surface plates. The masters are made in groups of 3, they coat them with a die called Prussian Blue, this die creates an extremely thin and uniform coating of about 0.01 thousandths. They lay one plate down on top of the other and this transfers blue marks from one to the other, then they scrape it using a tool which can take off around 0.001 thousandth per pass. They use 3 because when 1 and 2 match, and 2 and 3 match, and 1 and 3 match, then they know the surfaces are actually flat...
So I would say if you want to build precision machines, the easiest thing to do is buy your surface plate and then make everything else by cloning it.
Off topic: A surface grinder is actually quite easy to make, you clone a surface plate twice, once for the bed and once for the carriage. The carriage slides on a film of oil over the bed and you just use rudimentary chains, tracks and screws to control the right/left and forward/back because these are not precise. Also the angle of the head is not precise, everything can be eyeballed.
A surface grinder is the most rudimentary machine, it requires only 1 flat surface.
A lathe requires 4 flat surfaces: 1. Vertical ways (up-down truing) 2. Horizontal ways (back-forth truing) 3. Vertical cross-slide - parallel to horizontal ways 4. Horizontal cross-slide - square to vertical ways Then the headstock needs to be parallel to horizontal and vertical ways.
The milling machine is the worst, because it has all of the surfaces of the lathe, but it also has a Z surface which needs to be trued on two axes.
Fortunately the lathe and mill are not generally expected to produce work better than +- 1 thousandth, but the cylindrical grinder and the EDM have all of the same problems as the lathe and mill, but are held to a much higher standard...
I've been thinking about this, I have two possible solutions: 1. Air bearings which are obviously self-cleaning 2. Oil bearings with an oil pump which forces a continuous stream of fresh (filtered) oil into the bearings and sweeps away dust
Air bearings have really good precision, but they're expensive to buy commercially and not that easy to make, so I tend to lean toward #2, but I don't know how much oil flow you can push without it beginning to lift the carriage up off of the ways...
I imagine somebody has studied this because it seems weird not to...
I think it goes without saying that you'd like to have grinding in a room with lower air pressure than the machining room, but even grinders have surfaces, so there's still a problem that needs to be addressed...
Know how good your code needs to be for the task at hand. Start with a rough draft. Try to soften requirements if you can. Don't get distracted. Make small changes. Practice specific skills.
i dont even know if squeekboard *can* run on sway because as i understand it wayland is held together by one million protocol extensions that no one has bothered to standardize yet. the only alternative is an always-tiled one that 'sucks less,' the worst thing that can ever be said about a piece of software
@goosey Yes, it's still available for free! Paris released As-Easy-As 5.7 for free from his website, by sharing a valid registration code in their forums. The forums are offline now, but there's a link to it (via the Wayback website) in the video description. There's even a free PDF copy of the manual.
It's a great spreadsheet and I still love using it.
Une trentaine de pays dont la Bolivie, la Colombie, Cuba, le Honduras, la Malaisie, la Namibie, le Sénégal et l’Afrique du Sud du Groupe de la Haye se réunissent à La Haye pour décider de mesures concrètes contre le Génocide du peuple palestinien. Ils affirment être « guidés par les buts et principes énoncés dans la Charte des Nations unies, ainsi que par la responsabilité de toutes les nations de défendre les droits inaliénables, y compris le droit à l’autodétermination, qu’elle consacre pour tous les peuples ». rfi.fr/fr/moyen-orient/2025071…
À l’initiative du Groupe de La Haye, un « sommet d’urgence » se tient ce 15 juillet à Bogota en Colombie pour déclarer des « mesures concrètes » et tenter de mettre fin au drame qui se déroule dans l’enclave palestinienne depuis octobre 2023.
who wears their watch on the right wrist? Double layers of shits are a bit overdressed for summer. I think you should alert TSA immediately southpaw shouldn’t be able to fly.
I love flying, of course I haven’t flown since before the towers fell. Seats were wider and there was a barrier in fees to keep most of the unwashed off the plane. You might want to keep a mask dabbed with a bit of mint oil or some other pleasant smell.
@scottdhansen just a final note on the trip from MKE to DFW. The gal next to me was so large, she “spilled over”, under the armrest onto my seat. I mean WTF?! If I wanted to be in contact with a stranger (who smelled BTW) the entire flight, I would have paid extra for it!
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The Trump administration is attacking academia because it threatens existing power structures and dominant elites. This is seen most clearly when it comes to Palestine.
Εξεταστική για τον ΟΠΕΚΕΠΕ από την εποχή του Χαλκού 3000π.χ. έως σήμερα. προτείνει η κυβέρνηση με αναφορές στον βασιλιά Μίνωα που σύμφωνα με στοιχεία της ΝΔ είχε ξεκινήσει το φαγοπότι των επιδοτήσεων στην Κρήτη
A February 2024 report revealed that millions of dollars were mysteriously transferred from Jeffrey Epstein’s bank accounts after his death, raising suspicio...
https://x.com/KatieDaviscourt/status/1944153144499614076
Happening now: A man dressed in a pig costume is outside the ICE facility in Portland demanding “big booty Latinas” not be deported.
Iran’s President Masoud Pezeshkian suffered minor injuries in an Israeli air strike on a meeting of the Supreme National Security Council in Tehran on June 15, a senior Iranian official said.
The assassination attempt targeted the heads of the three branches of government in an effort to overthrow it, said the official, speaking on condition of anonymity.
The strike was carried out shortly before noon during a meeting attended by the heads of the executive, legislative, and judicial branches of the government along with other senior officials.
The semiofficial Fars news agency also reported new details on the assassination attempt during Israel’s 12-day war with #Iran, which was first announced by the Iranian president in an interview released on Monday.
The session was taking place in the lower level of a government facility in western #Tehran when the attack started, Fars reported. The building’s entrances and exits were hit by six missiles to block escape routes and cut off air flow.
Electricity was severed following the explosions, but Iranian officials managed to escape through a pre-designated emergency hatch, including the president, who is said to have sustained minor leg injuries while evacuating. aljazeera.com/news/2025/7/13/i… #IsraelTerroristState #imperialism #war
Gribēju saregulēt velosipēda Alfine11 rumbas pārslēdzēju, meklēju video kā to dara, nekā laba nevar atrast, beigās ir viens video. Skatos, jā, ir labs! Jāuzliek "Like". Skatos, "You liked this video 7 years ago" 😀
Enquête scientifique aux origines du Covid-19, épisode 1. Sciences et Avenir raconte comment, cinq ans après, les scientifiques sont de plus en plus nombreux à questionner l'émergence zoonotique (dite "naturelle") du virus.
Kurze Frage: Gibt es eine Möglichkeit in der Kachel "Circles" die Anzeige der neuen Beiträge hinter den einzelnen Circles zu deaktivieren? Siehe Screenshot:
@Fedinaut ✅ Dann schau mal unter fedivim.nospy.net/admin/site > Performance > "Erstelle Zählungen je Circle bei der Berechnung der Netzwerkanzahl" und deaktiviere dort den Haken
TEHRAN (Tasnim) – The United States government confirmed it is using Canary Mission, a notorious pro-Israel website, to target and expel pro-Palestinian activists, drawing outrage from civil rights groups accusing Washington of weaponizing anti-Pales…
youtube.com/live/RdDdUxVz5Lw?s… This Epstein mythology is not more important than keeping my real enemies out of power. I don't like either party, but this MAGA thing has accomplished more of what I want than any other movement.
The Right Wing Influencers have lost their mind over the Epstein case. I break it down here. 🎙️ New to streaming or looking to level up? Check out StreamYar...
"The world must not remain neutral in the face of this genocide. It must stand with the oppressed, lest the time comes when it faces injustice and is abandoned by the world. Everyone must unite against America and Israel. Freedom for Palestine 🇵🇸"
The Israeli-made satellite, launched from Cape Canaveral aboard a SpaceX rocket, is set to restore and enhance Israel's satellite communications capabilities, nearly a decade after the loss of Amos 6 dealt a major blow to the country's space industry
@davetortoise, well, Android itself is FOSS, but full of Google APIs and controlled by it. But it exist also an de-googled version. Apart of this, there are a lot of alternatives
@Catweazle interesting article, I wasn't aware of a lot of that. Is it possible to run a live session on a mobile phone the same way you can on a desktop?
@davetortoise, I've never had done it in a phone. Andisearch said
Yes, it's possible to run different operating systems on mobile phones through virtualization and emulation, though with some limitations:
For Android phones: - Ubuntu Touch can be installed directly on compatible Android devices like the Google Pixel 3a/3a XL and Fairphone 4[^1] - Linux distributions like postmarketOS, Mobian, and Manjaro ARM can run on specific phone models[^11] - Windows 10/11 can be virtualized using QEMU, though performance is very slow and not practical for daily use[^19]
For newer Android 13+ phones: - Windows 11 ARM can run in a virtual machine thanks to improved virtualization support[^13] - According to developer Danny Lin, who demonstrated Windows 11 running on a Pixel 6: "Windows 11 as a VM on Pixel 6" is possible through Android 13's standardized virtualization system[^13]
For running Android within Android: - VMOS allows running a virtual Android environment inside your primary Android system, complete with Play Store access and root capabilities[^24]
The key limitations are: - Device compatibility is restricted to specific phone models - Performance may be significantly slower than native OS - Not all hardware features and peripherals are supported - Installation can be complex and may require technical knowledge
With the end of the colonial era, African states gained independence, adopted their own flags and national anthems. Yet true freedom remained elusive. The colonial powers never fully withdrew from the...
Stephen Kapos, an 87-year-old Holocaust survivor from Budapest, speaks out on Israel committing genocide in Gaza.He's such an inspiring voice, full of moral ...
A large crowd of protesters cheered and embraced 87yo Jewish Holocaust survivor Stephen Kapos as he arrived a Charing Cross police station, where he had been summoned for police questioning over a peaceful anti-genocide march on 18 January that police falsely claim ‘forced’ its way through police lines. Despite abundant video evidence showing the protesters were invited through, more than twenty people have so far been charged.
Starmer keeps targeting Jewish people in his war on free speech and protest rights about Palestine and Israel Holocaust survivor Stephen Kapos on his way to Charing Cross police station, where he w…
the power of Netanyahoo's mobilization of "antisemitism" as a weapon of war. The gullible governments of the west have thought that it has something to do with the evils of historical antisemitism. It does not.
Kyiv was burning as Dr. Borys Todurov sped through the city in an ambulance, undeterred by the deep thuds of explosions and the terrifying sounds of Russian drones flying overhead. He was determined to deliver his precious cargo: a human heart.
HBD to Stuart Christie—anarchist, publisher, and revolutionary. At 18, he was arrested for an attempt on Franco’s life. Later, he helped relaunch the Anarchist Black Cross and Black Flag magazine. He was also arrested and acquitted in the Angry Brigade trial, and built ChristieBooks, archiving radical history. Learn more and explore related titles here: blog.pmpress.org/authors-artis…
Stuart Christie, 10 July 1946-15 August 2020 Glaswegian anarchist, writer and publisher. Arrested in Madrid, aged 18, in possession of plastic explosives to be used during an attempt on the life of the dictator Franco.
Hi, I recently finished setting up my Asustor NAS, and I found the snapshotting setup in it a bit confusing, so I'm writing this as a quick reference that might be hopefully useful to others.
For context, my device is a AS1102TL, and it's running ADM 4.3.3, but I imagine it should apply to all recent Asustor devices.
First of all, the reason I picked Asustor instead of e.g. Synology... it's because it was not clear if the latter actually supported LUKS full disk encryption on an external usb hd. In Asustor you have to ssh into your NAS, but you can definitely do it.
The only gotcha: If you created the LUKS volume recently on another system, it's likely that it'll be using Argon2 for key stretching. A memory-intensive algorithm, for which the 1GB of memory provided by my AS1102TL is not enough. The solution is simply to add another key with a different algo, e.g. PBKDF2, or just create the volume on your Asustor. Either way, you're going to be able to read and write it both from the NAS and another Linux on your pc.
$ sudo $(which cryptsetup) luksOpen /dev/sdb1 encrypted # "encrypted" is just the name that I gave to the device, pick anything... remember the `-S` flag if you need to select a key in a different slot
$ sudo mount /dev/mapper/encrypted /mnt/USB1
... do what you want ...
$ sudo umount /mnt/USB1/
$ sudo $(which cryptsetup) luksClose encrypted
Unfortunately, this doesn't mean that once mounted, the disk will be integrated in the ADM ui (you're not going to be able to see it in the "External Devices" ui, nor be able to select it as a destination in the "Backup & Restore" ui).
Normally, mounted external drives are available on paths like /share/USB0, /share/USB1. Maybe it could be possible to mount (or symlink your mount point for) your disk there, to make it usable to ADM, but by default /share is an immutable loop mount of /volume0/.@system/sharebase.loop
$ lsattr -d /share/
-----i------- /share/
Trying to workaround that with chattr and maybe manually modifying sharebase.loop felt a bit more risky than needed, so I didn't attempt that (the ADM ui doesn't provide a btrfs send functionality, so it's not very interesting for our purposes anyhow).
Now, you have two different approaches to accomplish incremental backups of btrfs snapshots, one where you just create them yourself from the CLI, and one where you can try to reuse the snapshots created in ADM.
I'm using the same naming convention, and same location that is used for snapshots created by ADM (you wouldn't get conflicts anyhow, unless you're creating another one in the exact same minute).
I recommend the -v verbose flag for btrfs receive, otherwise you're not going to see progress while the operation is ongoing.
That's it! Of course, the first send will have to happen without specifying a parent with -p, to do a full clone.
Reuse snapshots created in ADM
There are two problems with this: the snapshots created by ADM are not read-only and they are mounted right under the toplevel.
To address these issues:
sudo mount /dev/md1 -o subvol=/ /mnt/rootvol
sudo btrfs property set /mnt/rootvol/v2025079-2324/ ro true
then pick a parent snapshot, and send the incremental changes:
As above, use the -p and -v flags as needed. That's it!
If you're wondering why did we have to mount the / subvol, you can try without:
You can mount the snapshots directly in ADM's Snapshot Center, by toggling the Preview toggle for a snapshot. In that case, they are still going to be RW, though mounted as RO. You can deal with that by remounting: sudo mount -o remount,rw /volume1/.@snapshots/v2025079-2324/ && sudo btrfs property set /volume1/.@snapshots/v2025079-2324/ ro true,
You can then try to send the changes, but what you're going to get is:
$ sudo btrfs send -p /volume1/.@snapshots/v2025079-0824/ /volume1/.@snapshots/v2025079-2324
ERROR: not on mount point: /volume1/.@snapshots/v2025079-2324
The error is a bit confusing (you have mounted the volume! why is that not good enough?), but you can get a bit of clarity with btrfs subvolume list.
$ sudo btrfs subvolume list /volume1 -qua
ID 256 gen 159842 top level 5 parent_uuid - uuid cbc37b20-901f-b043-8cf1-59b814814140 path <FS_TREE>/base
ID 258 gen 151914 top level 5 parent_uuid - uuid 5039c206-1a89-dc45-a9fe-43f8959cb672 path <FS_TREE>/.iscsi
ID 259 gen 159840 top level 5 parent_uuid - uuid 06d46207-9aa2-2944-ba38-e5736963ec12 path <FS_TREE>/.@plugins
ID 2758 gen 157876 top level 5 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid 256c36c5-7033-a945-a2db-b6a334a8419f path <FS_TREE>/v2025079-0824
ID 2759 gen 157859 top level 5 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid 88942ee6-8b52-3d4d-b972-5de2d6764728 path <FS_TREE>/v2025079-2324
ID 2762 gen 159833 top level 256 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid 6d636914-35a0-3f42-9486-bf5d673b94c5 path base/.@snapshots/v20250710-0936
ID 2763 gen 159836 top level 256 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid e99df217-4946-a740-bba9-99f64f1a0d69 path base/.@snapshots/v20250710-0951
Now, compare with the output when listing /mnt/rootvol:
$ sudo btrfs subvolume list /mnt/rootvol/ -qua
ID 256 gen 159867 top level 5 parent_uuid - uuid cbc37b20-901f-b043-8cf1-59b814814140 path base
ID 258 gen 151914 top level 5 parent_uuid - uuid 5039c206-1a89-dc45-a9fe-43f8959cb672 path .iscsi
ID 259 gen 159840 top level 5 parent_uuid - uuid 06d46207-9aa2-2944-ba38-e5736963ec12 path .@plugins
ID 2758 gen 157876 top level 5 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid 256c36c5-7033-a945-a2db-b6a334a8419f path v2025079-0824
ID 2759 gen 157859 top level 5 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid 88942ee6-8b52-3d4d-b972-5de2d6764728 path v2025079-2324
ID 2762 gen 159833 top level 256 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid 6d636914-35a0-3f42-9486-bf5d673b94c5 path <FS_TREE>/base/.@snapshots/v20250710-0936
ID 2763 gen 159836 top level 256 parent_uuid cbc37b20-901f-b043-8cf1-59b814814140 uuid e99df217-4946-a740-bba9-99f64f1a0d69 path <FS_TREE>/base/.@snapshots/v20250710-0951
as you can see, the snapshots created in ADM are directly under top level 5 and if you list them under /volume1 (which is just the mount point for the /base subvolume), they are not found directly underneath (despite them being mounted there), which is why you see them being under their own <FS_TREE>.
Conversely, the ones that you can create directly from the cli under volume1, appear as top level 256 and they are under /base if you list the subvolumes under /mnt/rootvol.
PS, while I was closing the dozens of tabs that I opened to investigate how everything fits together, a note on what I wrote earlier:
this doesn’t mean that once mounted, the disk will be integrated in the ADM ui (you’re not going to be able to see it in the “External Devices” ui, nor be able to select it as a destination in the “Backup & Restore” ui).
mounting the disk on a path already accessible by ADM file explorer doesn't work because of permission issues, similar to the immutable flag that you can see with lsattr... but someone on Reddit had another workaround:
I mounted the opened device to another path already accessible by ADM file explorer. I don't think it will matter where really. But in my case I made two partitions on an external USB drive. The first partition is a small exFat formatted (10GB). The second partition takes up the rest of the drive and is formatted with cryptsetup (LUKS). Finally, to use this I open the LUKS device and mount it to a location in the first partition (which is automatically mounted by ADM)
Thistle Hotel - Barbican - London...
Many guests are abusive. They have entered the country illegally and still choose to talk to us and treat us like S#!t. The Police that turned up were good as gold. I will only give credit where it is due and th…
Business Finance House are experts in business loans and short term business finance in Cheshire, Liverpool, Manchester and North Wales and the rest of the UK. Whether you need a cash flow loan, a bridging loan, a tax loan or any other type of business loan, our friendly experts can help you source the best deal for your needs.
opened up the Xbox 360 since I had to fix the DVD drive anyway, it also appears we are also good to EXT_CLK mod the board since I don't have the Samsung RAM
Versão original da música que agora todos conhecem por ser dos Queens of the Stone Age.The Desert Sessions são sessões experimentais de estúdio. Criadas por ...
Provided to YouTube by Pias UK LimitedFall On Me · DishkingThe Power Of A Loaded Gun℗ 2009 AG MusicReleased on: 2009-01-23Mixer: Dave van den DriesMixer: Jas...
Today, a funeral for a 20-year-old American man was held in the occupied West Bank. He was beaten to death on Friday, July 11. Sayfollah Musallet was “brutally beaten to death” by a group of Israeli racist thugs, otherwise known as “settlers.
Obi-Two al-Menashani
in reply to ↯ Klaatu - Some Brave Apollo ↯ • • •