Shiny, not shiny. The glossy side is at 1200, the satin side was the same but with a really light pass on the buffer lengthwise with the scratches. #dailygrind #knife #knives #knifemaker #knifemaking #customknife #customknives
Researchers had already created an ‘electronic skin’ for prosthetic hands made with new super-material graphene.
The new skin was much more sensitive to touch but needed a power source to operate its sensors.
Previously this required a battery but the latest breakthrough has integrated photo-voltaic cells in to the skin.
Dr Ravinder Dahiya, from the University of Glasgow School of Engineering, said: “The real challenge was 'how can we put skin on top of photo-voltaic and yet allow light to pass through the skin?’ That’s what we have done.”
The skin uses graphene, which is about one million times thinner than paper and is currently the world’s strongest material.
Its optical transparency allows about 98% of the light that strikes its surface to pass directly through it making it ideal for gathering energy from the sun to generate power.
Dr Dahiya said: “Human skin is an incredibly complex system capable of detecting pressure, temperature and texture through an array of neural sensors which carry signals from the skin to the brain.”
He said the researchers had made significant steps in creating prosthetic prototypes with synthetic skin that were capable of making very sensitive pressure measurements.
He said this meant prosthetic limbs could have a much a better sense of touch, temperature and texture.
Dr Dahiya said: “When the skin is placed on a prosthetic hand and the amputee then touches an object they are able to feel the contact pressure as well as temperature.”
He said the addition of a solar power capability meant there would be no need for an external battery to power the skin’s sensors.
The doctor said: “It is a skin that can generate its own energy, the power needed to operate it.
"This from prosthetic point of view leads to a skin that lets an amputee feel plus, without any additional battery, the prosthetic limb will be lighter.”
He said: “We are trying to bring the weight closer to the normal human hand. There is still a long way to go.”
The new skin requires just 20 nanowatts of power per square centimetre.
Dr Dahiya said the skin had easily generated more power than it needed but it was currently not possible to store the energy.
He said the team were already looking at ways to divert unused energy into batteries, allowing it to be used when required.
Eventually, the doctor hopes to power the prosthetic limb’s motors with the renewable energy as well - rather than just the skin.
Dr Dahiya added: “The other next step for us is to further develop the power-generation technology which underpins this research and use it to power the motors which drive the prosthetic hand itself.
"This could allow the creation of an entirely energy-autonomous prosthetic limb.
"We’ve already made some encouraging progress in this direction and we’re looking forward to presenting those results soon.”
The technology could also increase the functionality of robots, allowing them to have a better understanding of what they touch and interact with, according to Dr Dahiya.
If robots had limbs that were sensitive to touch and pressure they would be less likely to make errors or injure humans, he said.
The researchers hope to further develop the prototype in the next two years.
The team’s paper, Energy Autonomous Flexible and Transparent Tactile Skin, is published in Advanced Functional Materials.
Spectacular “black” fluorite under white light and then back-lit to show its true color: the richest purple I’ve ever seen on fluorite! Most of the crystal is too dense to let light pass through giving it its seemingly black color.
*Rock fact* What is black fluorite?
There is no “true black” fluorite. Black is used to describe specimens that are super dark and appear to be black in normal lighting. The true color of these specimens are commonly purple and rarely blue and are only seen when back-lit. Please note that natural specimens that are dubbed “black” are VERY rare! The darkness is caused by exposure to radiation during the crystal’s growth. The radiation levels do not make these specimens unsafe to handle; just makes them look super cool! Like all colored fluorite, black specimens are vulnerable to sun-bleaching/fading. Keep them away from sunlight if you want to preserve their rare beauty!
Continuing the catch-up, from Christmas, I took a little time to work on a personal interpretation of The Ghosts of Christmas Past, Present, and Yet To Come smiley I love the story of A Christmas Carol so much…I’d really like to keep developing a version of my own! I’ve always loved the Victorian Christmas where warmth, joy and firelight aren’t so far from the fear of winter’s chill. In this take on the spirits- Christmas Past is the little firelight of Scrooge’s own candle, the bell that rings to signify the haunting, as flickering and insubstantial as memory. I imagine her fading and passing her lights on to Christmas Present who wears them as cowl of an advent wreath (the five candles traditionally symbolizing love, joy, peace, hope and the central flame of Christ). Present is a personified horn of plenty mixed with Saint Nicholas, a moving feast that paradoxically cannot be eaten by the starving child hidden in his robes (who will grow into the gaunt form of Christmas Yet To Come). And he is designed to evoke a decaying Christmas tree, under starlight.
Edit because I should have put this stuff in the post and not the tag: storm/weather witch Michael who creates lightning to strike people down or a tornado to wreck the streets behind them to help lose the cops
Animal witch Ryan who lets loose animals in the zoo and convinces them to tear apart someone once he’s done with them, it’s an easy way to dispose bodies
Jack who uses her magic to heal them just enough until they can get to Caleb. She’s a white witch and her magic is suppose to be used for good and it is. It helps Geoff when he’s stressed over a heist and Ryan when he can’t sleep. It help Michael control his magic when he’s pissed and keeps Gavin from fainting when he has to use his magic. It helps Jeremy keep from getting too anxious about a job especially in the beginning and herself when things get to much and she needs to keep herself sane and calm. It helps them all from going mad when someone gets captured.
time/fire witch Geoff who turns back time when something goes horribly horribly wrong and one of them dies and lights shit up when need be
Necromancy Jeremy who gets ghost to help distract people and bring people just long enough when he’s not finished with them. Jeremy can only bring somebody back for so long before it drains him and they aren’t fully back to themselves they’re, well, a zombie which is why Geoff has to turn back time instead of Jeremy just bringing them back.
Blood witch Gavin who hates his magic and only uses it when he has to
Garden witch Mica who makes vines grow from the ground to tie people up
Space witch Trevor who creates black holes and stars just hot enough to burn a person when Geoff isn’t around to do it
Eclectic Witch Lindsay who is basically the crew Jack of all trades
Creation witch Matt who makes new weapons and vehicles for the crew
and divination witch steffie who they all go to before a job to see how it goes
Another edit because something was pointed out by @whatdoyewant :
ryan using mangy cats and dogs, wild forgotten things that prowl the alleys and scrap for scraps. who are starved and half crazed and more wild than any zoo animal. zoos are precious conservation programs with rare species that are well taken care of, and he wouldn’t touch them. He’d summon the cats left behind, the dogs who ran from fighting rings and abuse, the rats that fill every crack of every dilapidated apartment and every sewer.
A friendly desert community where the sun is hot, the moon is
beautiful, and mysterious lights pass overhead while we all pretend to
sleep. Welcome to Night Vale.
WTNV is one of the the things that inspire me most. I am so in love with the concept of the unknown and the unquestioned weirdness of this place. Whenever I listen to the podcast I get the irresistable urge to express my love for this small dessert town so these 8 (postcard sized) paintings were created and I couldn’t stop myself from sharing them and spreading my love for the lovely people behind my favorite podcast of all times.