Shared posts

28 Mar 21:07

amusingabe:‘do a couple things’The Amenity Illustrations



amusingabe:

‘do a couple things’

The Amenity Illustrations

04 Apr 09:34

#SketchingSeason Closeups 



#SketchingSeason Closeups 

04 Apr 11:58

#SketchingSeasonA month of evenings spent sketching some of my...



#SketchingSeason

A month of evenings spent sketching some of my favourite instagram beauties.

0.3/0.5 pencil lead on cartridge paper.

T.S Abe

30 Mar 20:02

I was drawing t-shirt ideas[x]



I was drawing t-shirt ideas

[x]

01 Apr 16:57

It’s not the most beautiful site, but spin the globe for some...



It’s not the most beautiful site, but spin the globe for some public domain picture books from all over the world.

06 Apr 19:06

Nomada bees: the home invasion specialists

by Rusty
About twenty percent of all bee species in North America don’t bother to collect pollen. It’s not that they don’t need pollen for raising their young, because they do. But they would rather steal it than do all that hard work. We always think of bees as being the ultimate pollinators, so that one-in-five number […]
06 Apr 02:25

Several Hours Earlier...

Tertiarymatt

this gun b gud




Ads by Project Wonderful! Your ad could be here, right now.

Clinton has a roommate! I guess it is sort of an odd couple type deal.

06 Apr 09:47

Railroad thermite welding

Tertiarymatt

Come with me, down a youtube hole about welding rail with thermite.

Rail thermite welding in Storfors, Sweden. Schienenschweissen in Storfors, Schweden Rälssvetsning på Inlandsbanan i Storfors
02 Apr 17:54

Another Way to Trim Trees From the Air

by Will Smith
Tertiarymatt

A brief film on helicopter suspended spinning death blades.

06 Apr 00:00

Operating Systems

Tertiarymatt

Man, the mouse over text is all that matters in this one.

One of the survivors, poking around in the ruins with the point of a spear, uncovers a singed photo of Richard Stallman. They stare in silence. "This," one of them finally says, "This is a man who BELIEVED in something."
06 Apr 05:01

Litmus Test

by Ian

Litmus Test

04 Apr 00:29

Revenge porn site operator sentenced to 18 years in prison

by Andrew Tarantola
Tertiarymatt

Sometimes we get some small degree of justice.

If you think that posting nude pictures of your ex is somehow an acceptable response to your breakup, take a lesson from Kevin Bollaert. He's been sentenced to 18 years behind bars (he could be eligible for parole after 10) for operating 'yougotposte...
03 Apr 20:24

rejectedprincesses: Tu Youyou (1930 - ): Malaria’s NemesisIn...

Tertiarymatt

#valueinmagicalthinking beat? Via bl00



rejectedprincesses:

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.”

Sources: Wikipedia, Lasker Foundation, New Scientist

(thanks to vickadididididi for sending this in!)

26 Mar 23:04

R3 Monobath Developer Resource Page

by Bob Crowley
Tertiarymatt

This shit is really cool.

This is the page for information, tips, links and results of New55's R3 Monobath Developer.

Click here to buy R3 Monobath Developer in a ready-to-use bottle.

Click here for the formula which was invented by Donald Qualls and tested on quite a few different black and white films.

Introduction to R3 Monobath

Q: What is R3 Monobath?
A: R3 is a ready-to-use black and white film developer that allows anyone to process their own black and white film in about 6 minutes, using just one solution.

Q: What is a monobath?
A: A monobath is a developer that does the developing and fixing process in one step.  R3 works well when NOT agitated much. A little bit is OK but not necessary.

Q: Why use a monobath?
A: Because it is easy! It is also fast. And, R3 produces a unique look that can be very appealing.

Q: What precautions should I take?
A: We recommend you wear ordinary rubber gloves if you think you might want to handle films or containers wet with R3. Otherwise you should not get your nose close to the ammonia, which is irritating. Obviously, do not ingest R3, and if you do, call a doctor.

Temperature, and Time

Q: At what temperature should R3 be used?
A: 80F is the standard temperature. R3 must be warm. That's 27 degrees Celsius.

Q: How long does processing take?
A: About 6 minutes.

Films that work with R3

Q: What films can I process?
A: Most black and white films, probably. We have tested it with Efke, Ilford, Kodak and New55's Atomic X films, and achieved good to excellent results with all. An exception is Ilford ISO 3200 high speed film, which is intended for push processing. If you expose for ISO 800, R3 works fine.

Is R3 a universal monobath?

Q: I read in Haist that each monobath has to be tailored for the specific film?
A: Grant Haist wrote a good book from the point of view of Kodak films. It is an excellent book but generally avoids the solution that Qualls invented, which goes against some of "the rules".  Hooray Donald!

Household ammonia smell

Q: Why does R3 use ammonia? Doesn't it smell horrible?
A: No not really. The ammonia is less concentrated than household ammonia but you still don't want to stick your nose in it.  The ammonia controls the pH of the solution and that makes it work fast and controls the balance between the developer and the fixer.  The use of ammonia compounds to develop films was not accepted until several years of successful R3 use proved it worked.

Q: How can I keep ammonia smell to a minimum?
A: Easy. Process in a closed container. In a tray, cover it. I use sandwich containers made by Glad which have a lid that snaps on. I put about a half inch of R3 in the bottom and loosely cover it before going into the dark bag. Once the film is in, snap the lid and you'll have no smell at all.

Archival qualities of monobaths

Q: Will R3 produce an archival negative?
A: As long as the negative is washed well then it should last a long time.

Color casts and base fog

Q: My Tri-X processed in R3 was a funny color. It scanned well though.
A: Yes, Tri-X at first has a brownish tint, but this goes away after a while.

Q: I see base fog in some of my negatives
A: The presence of a small amount of base fog is a characteristic of monobaths and instant films, too. Scanners have little trouble with this, by the way.

Capacity of R3 for continued use

Q: Can I use R3 again?
A: Yes, depending on how much film you process, you can reuse R3. Stop reuse when you start to see degradation of the negative. It comes on slowly.

Processing kinetics, and push processing

Q: Why can't I process the film at room temperature?
A: R3 requires that it be warm! This allows the develop and fix process to produce a properly developed negative. If the solution is colder than recommended, you will pull the development and lose speed. If the temperature is hotter than recommended, it can be used to push process and increase speed. This can be very handy at times!

Q: Do I have to hold the temperature exactly?
A: No. It isn't very critical, but do try to keep it warm while you use it.

Tray Processing

Q: Can I process sheet films in a tray?
A: Yes, use a cover to hold the temperature, and keep the ammonia smell to a minimum. Plastic sandwich containers work exceptionally well and need very little R3 to cover sheet film.

Q: Can I process in a dark bag/changing bag?
A: Definitely! This is what I do all the time. The sandwich container and my sheet film holder take up little space, the the sandwich container is left a bit loose until the film is put in. Then I snap it shut.

Processing roll films

Q:What about rollfilm?
A: You can use a daylight processing tank with a reel. Don't agitate too much but be sure to use enough solution to cover the negative.

No agitation needed, and too much is not good

Q: Should I agitate the film?
A: Except to wet the film, agitation is not necessary and too much can cause streaks. A little bit is OK.

Q: I use a roller tank. How about that?
A: Sure, go for it. You should be fine, but remember to keep the solution warm, and the film covered.

Shelf life of tightly capped unopened R3

Q: How long will R3 keep?
A: Unopened R3 should keep for at least a year, which is a long time. It may even keep longer than
that.

Scanning negatives

Q: I saw the fantastic and superb photography you and your crew did with R3. What scanner did you use?
A: This is the kind of question I wish I actually would get, but is just a self serving fantasy.  It is an Epson V750 Pro. I think the results are actually quite nice.

Historic fact about monobaths

Q: I read that if monobath were any good, everybody would already be using them.
A: They have been, since instant photography began. Instant photographs all depend on a monobath.

Q: Why can't you ship outside the US?
A: It is too expensive to ship this outside the US, at present. But, you can mix your own very easily. Here is the formula.

Silver metal

Q: I see a layer at the bottom of used R3. Is that "sludge"?
A: That is metallic silver and is normal, and does not affect development. When you dispose used R3, you can save it if you like. A silversmith knows how to heat it to make a little bead of silver if you want.

Anonymous yet invaluable advice from a reader:

Anonymous said...
I've recently returned to LF after a 30 year absence and purchased a nice 3 lens Sinar F2 setup that obviously needed to be tested - alas, no more type 55. I stumbled apron this mono bath and wanted to share some success I've had through trial and error which have given me the results I was looking for.

The "Tupperware" sandwich box was a great starting point but temperature control was a bit of an issue. I've found that certainly you need to be in the 75-80 degree range but the falloff in temp, especially since there's such a small amount of solution being used was fairly quick. I also found the sandwich boxes were somewhat translucent and I wanted to be able to load them in a changing bag and let the film develop in daylight.

I found that by spraying the Tupperware with one of the "spray on rubber" products solved 2 problems. The rubberized coating acts as a great insulator and with a 10 minute development time I lose between .5 -1 degree. The second is that it makes the boxes light tight. I've sprayed 2 light coats over the box (with the lid on) and used a razor blade to cut along the top's seam which gives me a pretty much perfect light tight seal.

I also found that by straining the solution through a coffee filter after use removes almost all of the solids and I'm getting 9 or 10 uses from each batch (so basically 3 batches 1/2 inch deep in the box will handle a 25 sheet box of film.

I'm praying that the New55 project is a success but in the short term, using the posted formula and a few of the boxes I've made up gives me a 10 minute solution for test exposures - actually, the negs are of such good quality I can and do use them for either projection printing or scans.

Hope this helps someone.






03 Apr 02:13

How Are You I Am Fine

Tertiarymatt

As far as dates with Emily go, this could have been totally awesome, or completely terrible. Or possibly both.

30 Mar 05:11

Damn

Tertiarymatt

NSFW? Via A.Kachmar





Damn

01 Apr 04:24

Every Day Carry

Tertiarymatt

I like that Hanners has a thing for sexy firemen, but I don't know what she'd do if she actually got one.

29 Mar 16:45

March, 29th

Tertiarymatt

Little known fact: Ducks eat snow.
Ducks are valuable snow removal implements.



March, 29th

27 Mar 18:14

The Making of Interstellar's TARS and CASE Robots

by Will Smith
Tertiarymatt

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.

26 Mar 18:46

Epic 18 Month SSD Endurance Test Is Over

by Will Smith
Tertiarymatt

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.

30 Mar 08:00

Milling Time: Testing the Shapeoko 2 CNC Machine

by Ben Light
Tertiarymatt

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.

My Shapeoko 2

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.

Putting It Together

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.

Shapeoko mid-build, getting the gantry together.

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.

Almost finished with my Shapeoko 2 build

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.

CAM Software

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 web app

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.

Tabs can be easily added to designs so parts don’t go flying

Cutting Options

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.

Noise, Mess, and Materials

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.

Milling Acrylic

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.

Milling Aluminum

Shapeoko 3

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.

Who’s This For?

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.

28 Mar 17:04

alpha-beta-gamer: Pacapong is a glorious mash-up of Pacman,...

Tertiarymatt

Well, this is definitely a thing. via Osiasjota.







alpha-beta-gamer:

Pacapong is a glorious mash-up of Pacman, Pong and Space Invaders with multiple maps and cool retro music, It’s a wonderful blast of retro arcade fun.  It even features cameos from a certain retro primate. PacaDonkeyPong anyone?

Play Pacapong, Free (Win, Mac & Linux)

29 Mar 14:34

Cyrano

Tertiarymatt

Women are strange and terrible creatures, it seems.

http://oglaf.com/cyrano/

19 Mar 20:03

How to make a straw-bale pollinator garden

by Rusty
Tertiarymatt

So, this is pretty neat.

Straw bale gardens are unique. They fit anywhere, support your plants, provide ample space for roots, suppress weeds, and raise your garden up off the ground where it is easier to reach. Plus, if you have bad things in your garden soil, like nematodes or potato scab, straw bales can provide a clean slate. And […]
26 Mar 13:07

A Dangerous Book

by Juan

2015-03-26-a-dangerous-book

05 Mar 08:05

Photo















04 Mar 09:56

wendyortizart: Worked on this concept/study while my little one...

Tertiarymatt

I think this is also mommy stuff.



wendyortizart:

Worked on this concept/study while my little one napped .. Now back to mommy stuff. ✨

19 Mar 09:50

sarapocock: Cats can be assholes, but…

Tertiarymatt

for sure



sarapocock:

Cats can be assholes, but…

24 Mar 12:38

Reagent Mixer arrives at 20X24 in Ashland

by Bob Crowley
Tertiarymatt

Only 30L per day!

Our neighbors at New55 are 20x24 Studio which is an amazing thing because together we have concentrated all US instant film development under one roof.  Ted McLelland runs their engineering and contributes to New55, and one of his key areas of responsibility involves the making of reagents - also known as processing developer, goo, jelly or paste - for both black and white and color products.  Yesterday, one of 20X24's large units arrived in Ashland and was quickly set up by the experienced ex-Polaroid riggers who still move large things around New England.

In this series, Ted inspects the newly-arrived Big Mixer that uses heat, pressure, vacuum, large stirring vanes and lots of valves and gages interconnected in such a way as to produce about 30 litres of reagent a day.  That translates into enough reagent to fill a few thousand pods. This mixer was installed and run in Connecticut for the past several years, but now is under the same roof as the Pod Machine, which it feeds.

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.

25 Mar 15:24

Particle Physics Glimpses Inwards of Fukushima Meltdown Site

by Scott Wilson
Tertiarymatt

This is pretty fascinating.

Time-lapse of the reactor pressure vessel scan resolving as more muons are tracked through it - (Image via NHK)

Time-lapse of the reactor pressure vessel scan, and the muons tracking through it (Image via NHK)

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.

Diagram showing the detector setup and images from the reactor interior - (Image via TEPCO)

The detector setup and images from the reactor interior  (Image via TEPCO)

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.