‘do a couple things’
The Amenity Illustrations
‘do a couple things’
The Amenity Illustrations
A month of evenings spent sketching some of my favourite instagram beauties.
0.3/0.5 pencil lead on cartridge paper.
It’s not the most beautiful site, but spin the globe for some public domain picture books from all over the world.
this gun b gud
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Clinton has a roommate! I guess it is sort of an odd couple type deal.
Come with me, down a youtube hole about welding rail with thermite.
A brief film on helicopter suspended spinning death blades.
Man, the mouse over text is all that matters in this one.
Sometimes we get some small degree of justice.
#valueinmagicalthinking beat? Via bl00
Tu Youyou (1930 - ): Malaria’s Nemesis
In the 60s and 70s, China found itself in a precarious position: at war with Vietnam and the US, going through massive societal upheaval due to the Cultural Revolution, and, on top of that, ravaged by malaria.
To combat the spread of malaria, Mao Zedong formed a secret military group, nicknamed 523 for its starting date of May 23, to scour through tomes of ancient Chinese remedies in search of a cure for malaria. The task largely fell to Tu Youyou, a medical researcher in an era where scientists were unpopular at large. She labored over 2,000 potential remedies before, in 1977, finally hitting on an effective one: artemisinin, derived from sweet wormwood. After some false starts, the remedy was found to be effective in rats and monkeys. In need of an initial human subject, Tu volunteered herself.
"As head of this research group, I had the responsibility," she said. "It is scientists’ responsibility to continue fighting for the healthcare of all humans."
To date, this remedy remains humanity’s most effective weapon against malaria.
Unfortunately, Tu remained in obscurity, despite her herculean efforts. Her findings were published anonymously, and it was not until 2005, when a visiting researcher asked who had actually discovered artemisinin, that her name came to light — and even that required no small amount of research on the part of the medical community. A 2007 interview showed her living in poor conditions, working out of an old apartment building with intermittent heating problems. She only owned two electronic appliances: a telephone and a refrigerator (which she used to store herb samples).
She was recognized with the prestigious Lasker prize in 2011 for her efforts in fighting malaria. Upon receiving it, she remarked that she was grateful, but “I feel more reward when I see so many patients cured.”
(thanks to vickadididididi for sending this in!)
This shit is really cool.
As far as dates with Emily go, this could have been totally awesome, or completely terrible. Or possibly both.
I like that Hanners has a thing for sexy firemen, but I don't know what she'd do if she actually got one.
Little known fact: Ducks eat snow.
Ducks are valuable snow removal implements.
I've been waiting to see something like this. I loved TARS and CASE the most out of everything in this movie, and it's amazing to see how they worked on set, and the man who made them feel alive.
This is just absurd how good these things are.
We've advocated using SSDs in most PCs for several years, the benefits of having a drive with virtually no latency and a ton of bandwidth are obvious. But the longevity of flash memory used in SSDs has been worrisome--each flash memory cell can only be written to a finite number of times. That number of writes is large and SSDs use a variety of techniques to manage wear and keep your data safe when cells inevitably fail, but the manufacturer's endurance estimates for most SSDs range from writing a few dozen terabytes to several hundred.
To test SSD endurance in the real world, The Tech-Report has spent the last eighteen months writing petabytes of data to a sextet of SSDs, noting the total amount of data written and the condition at the time of their failure. The results are in, and the Samsung 840 Pro was ultimately the winner, but seeing how the different drives failed might be informative when you're deciding between MLC and TLC drives or different controllers for your next SSD purchase.
Of course, as the price per gigabyte for SSDs continues to drop, longevity isn't that much of an issue for home users. Typically people upgrade to larger SSDs before they have an opportunity to wear out. However, with new processes coming that promise to dramatically increase the density of flash memory, SSD endurance will become much more important.
Pretty interesting beast.
Over the past few months, I've been working with various desktop CNC milling machines. I first tested the Othermill, which I really enjoyed using. The next desktop CNC machine I tested was the Shapeoko 2. Shapeoko is an affordable, open source CNC kit that has been on the market for a few years. Originally a Kickstarter project, it grew into a robust product originally sold through Inventables, and now the Shapeoko 3 is about to launch--sold exclusively through shapeoko.com.
Given that the company is on its third generation product, there is already a large online Shapeoko community. Tips, tricks, and mods can all be found on the site’s forums. Numerous videos on YouTube show you everything from step-by-step mill assembly to machine calibration, and even material-specific best practices. That’s a compelling asset.
The mill itself is also very user friendly and lends itself well to modification. If nothing else, the Shapeoko is a very robust X, Y, Z plotter that is incredibly hackable. If you have plans to build your own job-specific machine, the Shapeoko’s parts would be great bones to start with. I have seen watercolor painting CNC’s, DIY laser cutters, even Zen garden sand printers built from this chassis.
If the Othermill is Eve, then the Shapeoko is Wall-E.
As I mentioned, the Shapeoko 2 arrives as a kit and must be user-assembled. The company sends everything you’ll need to put it together: wrenches, zip ties, a tap, even goggles. The ad claims you can build the Shapeoko in a weekend. I found this to be true if you're experienced in assembling kits (especially tapping holes) and have two solid days to devote to the build. For first-timers it will take a little longer, and there’s no need to rush.
Confession time, at the moment, my machine is mostly built. I assembled the X, Y, and Z gantry, put together the mill bed, installed the stepper motors and timing belts--all in a couple of days. The online directions are straightforward and thorough. And the build was an enjoyable process, and helps you learn how the machine works for future maintenence. But I eventually hit a wall, not because the assembly became difficult, but because I was faced with too many options. Which wiring system is best for me? What kind of enclosure do I put the motor controller electronics in? Do I want my e-stop on the left or the right? Well now I have to build a work table for the CNC to sit on, should it have drawers? Should I use a triceratops as a speed control knob?
Needless to say I'm still working on it.
So to actually get some testing done, I called up my friends Mark and Nick at Floating Point, a Brooklyn art/design collective. They were kind enough to let me spend some time with their assembled and working Shapeoko 2.
As far as CAM goes, Shapeoko says that “as long as your program can export standard gcode, Shapeoko can work with it.” So if you already have a favorite software, it will likely work just fine.
Back when these mills were being sold by Inventables, they recommended Easle (probably because Easel is developed by Inventables). Now they recommend MakerCAM for the newest Shapeoko 3 model. For all of my testing, I used Easel.
Easel is a free web app that works in your browser. It’s fairly barebones, but clear and easy to understand. You can import SVG files or draw your designs directly. This is a nice feature, basic shapes and icons can be quickly created and then milled. This cuts out the steps of going back and forth from one software to another, a typical practice in most CNC operations. I like the simple materials list and automatic tab function. They are smart, simple features that will make milling easier for beginners.
You have a few options for what does the actual cutting. The basic kit comes with a standard rotary tool that clamps on to the Z-axis. The full kit comes with a quiet, speed-controllable spindle that mounts using the same clamp. Or you can purchase a custom bracket to attach a heavier duty woodworking router. I performed all of my tests with the quiet cut spindle.
Truth in advertising: the spindle made very little noise and was more powerful than I expected. I don’t think I’ll waste any time using the rotary tool on my mill, but I am curious how the router will perform as the Shapeoko’s cutter.
No matter which cutting option you pick, the spindle controls work independently from the rest of the CNC. The speed and power are not tied into the rest of the machine. I wasn’t crazy about this design choice, I foresee myself forgetting to turn on the spindle someday or setting the wrong speed during a job and breaking some bits.
This is definitely a workshop-only machine. The mess is not contained and if you’re using a rotary tool or router as you cutter, the noise will be too much for inside a home or office. But it’s suitable for any garage, basement shop, or makerspace. For my testing, I milled wood, machinable plastic, acrylic, and aluminum.
This machine is ideal for wood. The spindle is beefy and cuts through with no trouble. Half of the pre-set material choices in Easel are different wood species. You have the ability to slide pieces of lumber through the mill, this allows for working with material longer than the 12” x 12” mill bed. Thick material can be quickly clamped down using the bench clamps that come with the kit. Definitely a win for woodworkers who want to get into CNCing.
I had a lot of luck milling acrylic too. There was little to no melting and very sharp edge details. If you don’t have access to a laser cutter, this will do the job. It does smell a bit though.
I didn’t have as much luck with aluminum or machinable plastic. But then again, I never have luck milling machinable plastic...why do I keep trying?
For aluminum, there was a lot of chatter during the cutting. I only had it clamped down, in hindsight, I should have used some double sided tape for a more secure hold. But I wasn’t thrilled with the cut quality. I don’t think I’ll be cutting too much metal with my Shapeoko.
The Shapeoko 3 will begin shipping soon, and it is expected to be a much more rigid and rugged machine. Inventables has also come out with a new model, the X-Carve. A bigger more rigid take on the existing Shapeoko design, that is completely backwards compatible with Shapeoko 2. I’m excited to see both of these machines in action.
I think that the Shapeoko 2 is good for tinkers and people who want to fully understand and modify their own CNC. It’s really for the “If you can’t open it, you don’t own it” crowd. And if wood is your material of choice, I don’t think you’ll be able to find a better more affordable solution out there.
This mill needs occasional maintenance, parts need to be tightened, calibration from time to time. Basically, this machine needs a little love. But the Shapeoko has so much potential, as well as a lot of character--something I never thought I’d say that about a CNC.
Photos by Ben Light. Find more of Ben's projectson his website.
Well, this is definitely a thing. via Osiasjota.
Women are strange and terrible creatures, it seems.
So, this is pretty neat.
I think this is also mommy stuff.
Worked on this concept/study while my little one napped .. Now back to mommy stuff. ✨
Cats can be assholes, but…
Only 30L per day!
|Ted McLelland and the equipment used to make reagents|
newly arrived at 20x24
|Inspection of the heat exchanger, which|
controls the process temperature
|The vessel in which the reagent is mixed|
under heat and pressure
|A large motor and gearbox turn the mixer.|
This is pretty fascinating.
The blisteringly hot epicenter of the Fukushima Daiichi nuclear meltdown has finally been exposed by a massive machine that uses space-based beams to look through reactor shielding. This method, called Muon tomography, has essentially provided the first pictures from within the interior of the now-defunct reactor.
Outside of the controlled environment of a functional reactor, scientists explore the mysteries of nuclear meltdowns using equations and computer modeling; The alternative of simply cracking open a fractured containment vessel and taking a good long look inside is not recommended. For obvious reasons, doing so would exacerbate an already catastrophic environmental disaster.
This poses a bit of a conundrum. In order to determine whether or not a reactor has melted down and breached its pressure vessel, someone has to get a good look inside of it—where high levels of radiation lurk.
Using billboard-sized detectors, which are filled with inert gases designed to detect and track the path of subatomic particles called muons, scientists have produced a remarkably clear image of the interior of Fukushima’s containment vessel.
An image which shows: nothing. But nothing is exactly what you would expect to see if the core’s fuel has melted down and escaped the pressure vessel.
Muon tomography, in a sense, is a bit like taking an X-ray image, only on a cosmic scale. They are effective for penetrating relatively flimsy things like human skin and nylon carry-on luggage. But particularly thick materials— say, the containment vessel for a nuclear reactor, which is explicitly designed to prevent radiation from seeping through—is not as conducive.
Enter muons. Muons are high-energy subatomic particles. Outside of specialized particle accelerators, they are primarily generated by cosmic rays hitting Earth’s atmosphere: the charged protons collide with atmospheric molecules and split into muons. They exist, on average, for only two microseconds, which is still plenty of time for them to penetrate Earth’s crust and other structures.
Making use of those high-energy rays to get a glimpse into large structures is not new. Most famously, muon tomography was used in the 1960s to get a glimpse inside one of the ancient Egyptian pyramids in Giza.
The tomographs have not revealed anything unexpected in the Fukushima Daiichi Number One Reactor, which is a good thing; the calculations and models used to simulate the meltdown and all potential outcomes appear to have been accurate. However, the details of what the interior of the reactor pressure vessel currently looks like helps resolve lingering matters of uncertainty—like whether or not all of the fuel melted out, or if some was left which will warrant special clean up.
The situation as a whole remains unappealing. The plans to scrap the reactors (rather than simply entomb them, as we did after the Chernobyl disaster) will take 40 some years to complete.
The post Particle Physics Glimpses Inwards of Fukushima Meltdown Site appeared first on From Quarks to Quasars.