pressure distribution

pastelynch  asked:

Hi!! if you are still doing prompts: Neil overworking himself and blowing out his arms again? and Andrew comforting him? i'm jumping on the angst train. Also i love your writing! it's so nice to read :)

(thank you darlin, sorry it took a while!)

Neil’s vision judders a little bit, like exhaustion is picking him up and shaking him. He can feel the sharp sting of sweat in his eyes and the open wound of his lungs, and the net looks farther away every time he blinks.

“Again,” Kevin calls. “But without your form crumpling in on itself.”

Neil grits his teeth. “I don’t see the point,” he says for the dozenth time. Kevin’s getting him to run drills with his left hand, and missing easy targets is starting to run cold and tedious. It’s a lesson in humility, maybe. Some sort of sociopathic vindication on Kevin’s part.

“You’re only half an athlete,” Kevin replies firmly. “Half your potential is squandered every time you hit the top of whatever box you’ve put yourself in and just accept it.”

Neil twirls his racquet and tosses it from one hand to another. He doesn’t like the weight of it in his wrong hand. His left bicep is screaming at being used so much, and his stronger arm is twitching jealously. He feels like he’s trying to talk without his tongue for no reason.

“If I’m using the wrong arm I’m just making myself a smaller box,” Neil argues. “It’s not necessary. Just because you have a handicap doesn’t mean you should impose it on everyone else.”

Kevin stiffens in the goal, and Neil can see his fingers spasming from halfway across the court.

“Fine. Limit yourself. You’ve never used even a fraction of your potential.”

“Then teach me,” Neil challenges. “Stop trying to prove something about your own versatility and help me hone my strengths. Or do you want to lose, next month?”

Kevin drops his racquet and it makes a wrenching clatter. “I’m going to win. If you’re not going to put in the effort then you can teach yourself.” He collects his fallen equipment on his way out of the court, the tendons in his neck straining the whole time. Neil looks back out towards the outer court where Andrew is watching, sprawled backwards on his hands with his head cocked.

Kevin meets up with him and jabs one hand back towards Neil, speaking in intense sentences punctuated by backwards looks. Andrew accepts whatever he’s saying by refusing to react, his face a perfect balance. Neil tries to watch the shape of their mouths but he can only see Andrew properly, and he’s not talking.

After thirty seconds of one-sided bitching Kevin makes a production of stalking off, and Andrew quietly follows behind. Something annoyed throbs in Neil’s stomach. He foolishly expected Andrew to come and confront him instead, maybe even end up taking his side.

He tightens his grip on his racquet and seethes in frustration, testing his left grip then right, left then right, until the difference feels too huge to be real, an uncrossable gulf.

He remembers detachedly when his now preferred racquet felt impossibly heavy. He remembers when he would rather have seen Andrew gone from the team than in his bed.

He looks back at the bucket of balls and the empty court, and everything tightens up: the muscles in his left arm, the walls of the court, that uncrossable gulf. Ichirou’s warning — the barbed wire around his heart —tightens too.

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The gorgeous golden mantella frog (Mantella aurantiaca) is a critically-endangered amphibian that is facing extinction from human pressure. Their distribution is extremely limited and their habitat faces destruction; in addition, they face heavy collection pressure from the pet trade. Please help protect Madagascar’s native frogs; if you want golden mantella frogs, make sure to buy only proven CBB specimens! The frogs would thank you if they could.

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Looked Beyond

“Their path to advancement might look less like a straight line and more like some of the pressure distributions and orbits they plotted, but they were determined to take a seat at the table.”

― Margot Lee Shetterly, Hidden Figures: The American Dream and the Untold Story of the Black Women Mathematicians Who Helped Win the Space Race

A tribute to the movie Hidden Figures and the women who inspired it. 

Katherine Goble Johnson, Mary Jackson, Dorothy Vaughan, thank you for pushing us towards the stars.

playmoss [x]

8tracks [x]

i’m not fucking sleeping (((:

i have to sleep on my back bc of top surgery and i can never get comfortable on my back

also the skin on my back and butt and the backs of my legs hurts bc it doesn’t get a break (pressure during the day from my wheelchair and pressure at night from sleeping on it)

i can’t move around in my sleep to change the pressure distribution because i can only really do that with my arms except now i can’t really do that with my arms so i just suffer

i’m still sore

i’m itchy as hell bc i’m allergic to adhesive but i can’t not have tape on my incisions and on the gauze on my nipples

i’m having mild nerve pain in my chest from the nerves calming down from surgery

my muscles won’t stop twitching but it’s easier to just stay off my muscle relaxers as long as i’ll be on tramadol (even just the 1 at night) than it would be to start them again and skip evening doses and all 

thank u for putting up with my whining lmao

anonymous asked:

Just wondering but does anyone know of like bracelets that would squeeze your wrists? I imagine them to be like 2 - 4 inches wide.

exercise wrist bands like the ones below are the best, they distribute pressure and can be pretty snug and are generally cheap
[example]

i would NOT recommend using rubber bands or anything thin like that because it can really mess up your wrists and your circulation

The Skinny on Skin: Here’s Why It’s So Tough

by Lisa Marie Potter, Inside Science

Skin has to be flexible enough to jump, crawl, and kick with us. It also has to be resilient enough to withstand our falls, scrapes, and cuts. Scientists have marveled at skin’s strength for years without knowing why it’s so durable.

Now, scientists have identified the mechanical properties that give skin its toughness. Their findings are the first to show that collagen, the most abundant protein in skin, moves to absorb stress and prevent the skin from tearing. In the future, this knowledge could help us use nature’s blueprint to make better synthetic skin and improve the strength of man-made materials.  

“[Skin’s] tear resistance is remarkable,” said the study’s co-author Robert Ritchie, a professor of engineering at the University of California, Berkeley and Lawrence Berkeley Laboratory. “Quite frankly, what surprised me is that we couldn’t break the stuff to begin with.”

The secret weapon lies in the dermis, the thickest of the skin’s three layers. This middle layer mostly consists of strong tendrils of collagen. The article, published last month in Nature Communications, described how collagen’s structure allows it to efficiently distribute pressure and prevent tearing.

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Hello corset side of tumblr. I just received my Josephine long-line underbust by Isabella Corsetry from the immediate line/sale (currently $166). Thus far, first impressions are good. It is comfortable, extremely curvy and the satin is gorgeous. I’m wearing the corset here at an external measurement of 23.5" at the waist and fully closed hip and rib for photographic purposes only. The ribs and hips were loosed to then season the corset properly. (sorry about the bra).
My measurements:
Underbust: 26"
Natural waist: (fluctuates between) 24.5-25.5" 
High hip: 30.5
Hip: 32
Center front: 12"

Josephine Specs: 
Underbust: 28"
Waist: 18.5" (meant to be 18")
Hips: 32"
Busk: 11" (not extremely longline, but long enough)
Back: 12" (it is a high back and doesn’t dig into the shoulder blades or the tailbone) 
The Josephine uses 16 ¼" wide spiral steel bones all around, with 2 flat steels supporting the busk and 4 flat steels sandwiching the grommets. The grommets do contain some splits, but these have been filed down and don’t catch on the laces which are plain black ½" wide double-faced satin. 

Cons:
- The bones do twist in their channels, and having a feel, the boning channels do seem a little large for the bones. Not a huge problem for me since I would love to floss this corset.
- The waist measurement isn’t exactly the advertised 18" but closer to 18.5". Seeing as this is made of twill, I would expect it to stretch over time to 19" so that’s something to keep in mind about.
- The stitching isn’t 100% perfect in some areas with the stitches outside of the ditch, but it’s rather unnoticeable.

Lacing up?:
Wasn’t particularly difficult. You do have to be careful though so the supporting bones in the back don’t bow or twist which is very easy to do in this corset. When I buy a corset I buy it based on hip and rib measurement and not waist measurement. My measurements correspond well to the shape of the corset - no pinching, no numbness, no breathlessness. It doesn’t feel particularly tight anywhere so the pressure is well distributed around the corset. 
Because the spirals are so small and flexible, they don’t so much push against the iliac as opposed to sitting on top of it and shaping around it. It’s not particularly heavy though. It is quite light so I’d say there are only 2 layers of fabric - 1 layer of black twill as the strength layer and the fashion layer.  

Overall, the immediate/sale line are decent, but for any corset priced under $200, don’t expect for the highest quality. The made-to-order corsets do have an option for coutil instead of twill and I’d imagine more care would be taken. If anything, the immediate/sale line are similar to samples. For the money, the corset is decent and is of waist-training quality. 

anonymous asked:

URGENT what's wrong with ace binding? That's all I have to use

Jay says:

Ace binders:

- unevenly distribute pressure which can leave some ribs under more pressure than others

- do not allow for breathing space which can crack ribs as you breathe

- restrict the breaths you take and make full, deep breaths impossible

- get tighter over time

And more. Basically, you can bruise ribs at best, puncture lungs at worst.

anonymous asked:

what about ace bandages makes them so bad for binding? like i know they're super dangerous but what exactly makes them so dangerous and other makeshift binders - like tights, compression shirts, etc - not as dangerous?

Fox says:

Any kind of wrap is bad because it won’t evenly distribute pressure on your chest, but ace bandages are the worst by far because they form to your body. Every time you breathe in and out, they get tighter– thus, constricting you like a snake.

If it happens too quickly, ribs will snap and break. If it happens over time, the ribcage will become permanently distorted. The ribcage is the biggest issue that we stress the most because it protects your heart and lungs, so if the wrong spot breaks or warps, you could cause extreme and even fatal injuries to yourself.

It can also cause back and stomach damage, potentially leaving you with chronic pains or gastrointestinal issues.

We have plenty of followers who can attest to the harm they’ve done to themselves by binding with ace bandages before (and even after) knowing their dangers. Feel free to drop a message or reply if you’re one of them.

#ace bandages

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 Reader elimik asks: 

Why do modern submarines have round bows instead of pointy ones, like the early WWII ones?  

Interestingly, there are more factors that affect this design choice than I originally thought! Perhaps the biggest factor, though, is propulsion. Although early submarines ran through several forms of propulsion from human power to steam, by World War II many subs were driven by diesel-power on the surface and relied on battery power when submerged. Power limitations meant that submarines of that era did most of their travel while at the surface, not underwater. As a result, the ships had better control and decreased drag with a pointed bow similar to that of a surface ship. It wasn’t until the advent of the nuclear-powered submarine that it became practical for submarines to spend most of their time submerged. Once fully-underwater travel was feasible (and, indeed, preferable), many subs transitioned to a blunter, rounded bow that’s more hydrodynamic underwater–and simultaneously more problematic control-wise when moving on the surface.  

Another factor separating WW-era submarines and modern subs is the depth to which they submerge. The deeper a submarine dives, the greater the pressure it must withstand. Rounded or cylindrical shapes make much better pressure vessels because they distribute pressure evenly around a surface. Historically, many subs have balanced control and hydrodynamics against pressure requirements by having two hulls, an outer one for cutting through surface waters and an inner cylindrical one that bears the brunt of the hydrostatic pressure. As we developed stronger materials, though, submarines have achieved greater depths. The German Type VII submarine, the most common U-boat of WWII, had a test depth of 230 m, whereas today’s Los-Angeles-class U.S. submarine can operate at 290 m. (Each 10 meters of depth adds about one atmosphere’s worth of pressure.) The combination of nuclear power for subsurface propulsion and stronger materials that allow deeper dives enables many modern submarines to have a single hull–the rounded hydrodynamic and pressure-resistant bow we commonly see.  (Image credits: U534 by P. Adams and USS George Washington by U.S. Navy)