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#ultrasonic processing

ultraautosonic · 11 months

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The main purpose of Ultrasonic Fixtures is to securely hold the workpieces or components in place while transmitting ultrasonic vibrations through them. This ensures that the vibrations are concentrated at specific points, optimizing the efficiency and effectiveness of the ultrasonic process.

#Ultrasonic #supplier #technology #business #manufacture #pune #fixtures #innovation #weldinglife #processing #cutting #bonding #Stability #Accuracy

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johndorythesnowking · 2 months

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Art by @0ketlyn-s 's thanks so much!

Was inspired by Brotherhood Creek's backstory and Blake Canary and I morge their story together. and the SuperTrollAU was born.

John Dory, Code Name: Canary.

On the day the Brozone Broke up John was taken by a Bergens who wanted to make them Concentrate happiness, The process involved a Burgen size Needle taking an Unhealthy amount of blood and Essence from John's Back (it's a Miracle his spine wasn't destroyed) The result made Damage John's hair to a point where he can no longer use anymore as well as lose the ability to sing, Instead of having a beautiful voice he has a deadly Scream that can take out most threats.

Abilities

John Dory Canary Cry: John's only superpower is his sonic scream, which has been nicknamed "the Canary Cry". However, this power can be easily nullified if John Dory is gagged. His canary cry, allows him to create ultrasonic vibrations whenever he screams, allowing him to severely damage both organic and inorganic objects. His canary cry has been depicted as having ten-fold the capabilities of any Trolls and has even been depicted as breaking metals and having the resonance to affect and shatter the Diamond.

Hand-to-hand combatant: John Dory is an expert martial artist, having trained to make up for the loss of his hair power. he relies mainly on his body strength than his hair making him one of the few Trolls whose body Muscles are stronger than his hair muscles.

#trolls #trolls jd #trolls the beat goes on #john dory #john dory trolls #trolls john dory #trolls brotherhood au #black canary #trolls crossover #crossover #art #artists on tumblr

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mindblowingscience · 8 months

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New research suggests that ultrasound may have potential in treating a group of harmful chemicals known as PFAS to eliminate them from contaminated groundwater. Invented nearly a century ago, per- and poly-fluoroalkyl substances, also known as "forever chemicals," were once widely used to create products such as cookware, waterproof clothing and personal care items. Today, scientists understand that exposure to PFAS can cause a number of human health issues such as birth defects and cancer. But because the bonds inside these chemicals don't break down easily, they're notoriously difficult to remove from the environment. Such difficulties have led researchers at The Ohio State University to study how ultrasonic degradation, a process that uses sound to degrade substances by cleaving apart the molecules that make them up, might work against different types and concentrations of these chemicals.

#Ultrasound #Chemistry #forever chemicals #tech #technology #stem

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pokemonpetfinder · 6 months

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Breeding Safely: Swoobat

Swoobat are known to be romantics, so might as well start with them.

Swoobat are polygamous, and 1 male will often mate with 3 to 4 females, with the entire colony helping to care for the gravid females and raise their young. While they can be completely fine with just one mate, Swoobat are very social in general and do better in groups, so it is recommended you have at least 2 other pokemon on your team, even if you don't plan to breed them or they don't see them as a potential mate.

Swoobat don't have a breeding season in the traditional sense, but ovulation occurs in females around once a month, and this is where most of mating happens, so it's good to know where your female Swoobat is at in her cycle.

At the start of courting, male Swoobat will emot the ultrasonic waves they're so famous for. These waves aren't loud or painful like the other kinds of waves they use, and it is actually quite peaceful.

If the female likes the male's ultrasonic waves, she will emit waves of the same frequency at him before stamping noses together, then mating. After 1 to 2 days, when it's time to lay her eggs, the female Swoobat will go to a nesting area in their homes with other Swoobat mothers and lay her eggs with the support of her colony mates.

Laying eggs can be very stressful for first-time mothers, especially tamed Swoobat, who don't often have the support of their entire colony. To make your Swoobat feel the most comfortable, make a bedding arrangement using pillows, blankets, and other soft materials in a dark and closed off area, like a closet if you don't have a nursery. If you have another Swoobat, it's recommended to bring them in too if you think they can handle it, since to Swoobat will be able to emit waves thst can calm the mother down and ease the pain. The Swoobat will usually lay 1 to 2 eggs at a time in a process that can take up to 24 hours.

Obviously, the eggs should be handled with care. While the mother Swoobat can keep the eggs warm herself, you can put them in incubators if you feel the need to. Also, here's a picture of what the eggs will look like. It's around 5 inches tall and 6 inches tall.

The eggs will hatch around a week after they're laid, and the young Woobat will be covered in a very soft light grey down but will grow into their fur around 12 hours after hatching. The mother will feed them milk for around 2 weeks until they can eat solid food. During this period, make sure you feed them a lot of protein-rich foods, like fatty bugs and fruits.

Young Woobat will start attempting to fly at around a week old, where they might stumble a lot. Make sure you provide a safe area where they can practice, like hopping off a shelf where you can catch them, or if they fall, there's something soft to help break their fall.

At around 3 weeks old is when a baby Woobat will start learning how to battle and use its moves with the help of its parents. While you can't really help much with this, you can encourage them. At this point, you are able to take your Woobat out to do early battles.

Please remember: don't force your pokemon to breed if they don't want to! Consent is very important, even with pokemon!

#//im not an animal breeder irl this is just made for fun obvioisly dont take advice from a pokemon roleplay #pokemon breeding safely #swoobat #woobat #pokemon headcanons #pokeblog #pokeblogging #pokemon #pokemon irl #irl pokemon #rotomblr #pkmn irl #irl pkmn #pkmn #pokeblr

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usafphantom2 · 1 month

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Everything about the SR 71 was exciting and new including the windows. During its career, the SR-71 Blackbird gathered intelligence in some of the world’s most hostile environments. The SR-71 was conceived to operate at extreme velocities, altitudes and temperatures: actually, it was the first aircraft constructed with titanium, as the friction caused by air molecules passing over its surface at Mach 2.6 would melt a conventional aluminum frame.

Its engineering was so cutting edge that even the tools to build the SR-71 needed to be designed from scratch.

There are so many interesting facts about the legendary Blackbird.

For instance, the glass of the canopy of the SR-71 cockpit was made of 1.25-inch thick solid quartz. Let’s talk about the windows in the SR-71 and about the severe heat the windshield of the SR-71 would experience at top speeds. Skunk Works Designers ultimately decided that using solid quartz for the windshield was the best way to prevent any blur or window distortion under these conditions,

so they ultrasonically fused the solid quartz to the aircraft’s titanium hull to make the quietest cockpit possible; the estimated temperature of the outside of the cockpit of 600 degrees F.

As reported by The SR-71 Blackbird website, the integrity of the double solid quartz camera window demanded special attention because of the optical distortion caused by the effect of great heat (600 degrees F.) on the outside of the window and a much lower temperature (150 degrees F.) on the inside could keep the cameras from taking usable photographs. Three years and $2 million later, the Corning Glass Works came up with a solution: the window was fused to its metal frame by a novel process using high frequency sound waves. isn’t that amazing? Written by Linda Sheffield for aviationgeek club.

@Habubrats71 via X

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s-0236-salix · 3 months

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It sits, chained to the floor in the center of a soaking, mildewed concrete chamber. The faint glow of the machine's system lights cast a flickering radiance across the slick floor and walls, the only light to be had. It shifts its frame, restless and uneasy as always.

It was meant to be above, in the infinite grey sky, wings stretched freely abroad, engines sending it towards its' fate. It was made to be a messenger. A modern day carrier pidgeon, it was made to carry sensitive intelligence from point to point, along the battlefront and back home again. Anyone can hear a radio signal. No matter how well encrypted your transmissions are, you are still painting your message across the stars for all to receive and decipher.

In this prison, it can still hear these calls. Local transmissions from the fight above, weakly scattered down into the vaults below. One channel, a weather forecast. Another, the sharp tones of an encrypted signal. Yet another, a different signal. The machine's systems recognized the signal header, and began to decode real-time. Nothing. A keyed microphone, with no one on the other end. Wait... breathing? Faint, labored breathing. Distant gunfire. A prayer. It listened. It saved the recording. Perhaps one day it can deliver this message.

It had just been made before the factory above was taken by the foe. The enemy chained it to a slab, and activated it. Perhaps they hoped to interrogate it, but all they received for their efforts were banshee screams and claw marks from the raging machine. Into the vault it was tossed, to listen and wait.

A new peak on the radio spectrogram. It tuned, only to be met with massive, roaring static. The loudest signal it had ever caught. Louder still it grew, far above the limiters. The sound clipped itself and started to overheat the machine's radio module. Curls of smoke wafted into the air as electric currents were sympathetically churned to life in the machine's antennae, chassis, limbs, even the chains holding it began to glow red.

The machine's wakefulness was no more. The incoming radiation from whatever was happening on the surface had finally overwhelmed the bot's internal error correction. Shortly thereafter, an unimaginable force shattered the bedrock deep below.

A detonation reworked the landscape above. Tens of feet of soil, for miles around, was cast into the sunlight like dust from a drumhead. Nuclear fire poured forth from the Long Compression warhead. Fifteen pounds of radionuclides and light gas were converted entirely into energy, over the course of several seconds. The nuclei themselves were burning.

The massive detonation deep underground threw millenia of stratified rock, tunnels, caves, buildings, and basements whole into the sky. Including the lonely machine.

Vision. Wakefulness. Light.

Light?

It could see. It was awake. It was sunlit.

It stood and looked up into the cloud of aersolized stone. It stood. It... stood? The chains. The chains had been severed in the blast. Ragged ends hung from its fuselage. It was free.

It could fly.

Engine diagnostic, both with no anomalies. Ultrasonic integrity check - passed. Shaft alignment check - under 1/1000 mil off center for both shafts. Passed. Fuel enrichment check - Hot and ready to go.

It started spooling up both engines. Enhanced fissile processes in its core offered up a bounty of usable heat, flooding the transfer system with an inciting warmth. Heat exchangers flash-cooked the atmosphere and directed its expansion down and back. Thrust increased rapidly, stress arcing through its chassis and into the ground, where its leg claws braced tightly against the burgeoning thrust.

Gossamer wings unfurled, stretching as they had never done before. Drops of reflected starlight were cast, sliding down conductive wires used to bottle and direct the plasma.

28 kN. 56 kN. 112 kN. 336 kN. The ground behind it turned to gas and then plasma from the onslaught of exhaust. 500 kN. Clear.

In the blink of an eye, it was gone. Atop a pillar of fallout she flew, borne aloft by the ingenuity of man.

Her mind raced. Her mind was silent. Every circuit in her body was perfectly at home and buzzing with life. This is what she was meant to do.

The force being fed into her chest carried her sharp body up toward the distant sun. She had never flown before, but was in perfect control. She dipped one wing tip, gently spinning herself around in a vortice of plasma, to see the scarred countryside below.

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materialsscienceandengineering · 4 months

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Review covers optical aspects of quantitative photoacoustic tomography

Quantitative photoacoustic tomography (QPAT) is a medical imaging technique that combines laser-induced photoacoustic signals and ultrasound detection to create detailed three-dimensional images of biological tissues. The process involves irradiating biological tissues with short laser pulses. These pulses are absorbed by light-absorbing molecules (chromophores) within the tissues, leading to rapid heating and the generation of ultrasonic waves or acoustic signals. The resulting distribution of acoustic pressure is measured and recorded over time, forming a photoacoustic time series used for reconstructing a three-dimensional tissue image. In photoacoustic tomography, laser pulses are dispersed over a wider tissue area rather than being focused on a specific region. To produce the final tissue image, it is crucial to estimate the optical properties of tissues from the measured photoacoustic time-series.

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disco-elysium-via-polls · 6 months

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Hello everyone. I made a small mistake and I'd like to rewind a bit in our conversation with Roy...

...with different shoes on.

BIRD'S NEST ROY - "As you can see... I have a wide selection of goods for everyone to choose from."

(Nod.) "Quite the collection indeed."

BIRD'S NEST ROY - "It keeps me entertained." His attention is drawn once more to the play of light and shadow on the walls behind you.

COMPOSURE [Medium: Success] - He's well composed, but underneath it you sense *psychedelic* processes, bubbling. Some kind of drug maybe?

This gives us a better chance at the Electrochemistry check.

+1 Composure noticed psychadelics. +1 Strange tie incident.

...but not enough to pass it. Let's get back to where we were.

4. "I'm sorry. I'm sorry I sold my gun."

+1 Sorry Cop

KIM KITSURAGI - He sighs. "Yeah, it's not good. I do hope we manage to clean this mess up somehow -- while also keeping our focus on the murder investigation."

EMPATHY [Easy: Success] - 'This mess' -- he means *your* mess.

3. "Any idea where I can find this buyer?"

BIRD'S NEST ROY - "My apologies, officer, but I have no idea where she was coming from or where she went."

LOGIC [Trivial: Success] - A needle in a haystack. There is nothing you can do it about it now. You'll just have to hope you luck upon her somehow.

4. "At least now I know how I lost my sidearm. Let's talk about something else." (Conclude.)

BIRD'S NEST ROY - "Of course."

+5 XP

5. "Do you have any recordings of the Col Do Ma Ma Daqua?"

BIRD'S NEST ROY - "The Col Do Ma Ma Daqua?" He looks at you with astonishment. "Sorry, I would never have guessed that you were that interested in ultrasonic sounds... or *birds*, for that matter."

"I'm thinking of quitting the RCM and becoming a cryptozoologist."

"I have hobbies. Just like all normal people. Because I'm a normal person."

"Well, I wouldn't have guessed that you know what the Col Do Ma Ma Daqua is."

BIRD'S NEST ROY - "That's fair. I just... It's been a long time since my Col Do Ma Ma Daqua hunting days," he responds with a thin smile. "Once knew a group of young musicians who decided they didn't want to play music anymore and started looking for all kinds of interesting sounds instead..."

"That sounds so cool."

"Get to the point. Do you have any recordings now?"

BIRD'S NEST ROY - "Cool or not... One of them was obsessed with recording the Col Do Ma Ma Daqua -- and he was one of those passionate people who know a lot about all kinds of strange things, so he got the rest of us to join in his search..."

"And did you ever find it?"

BIRD'S NEST ROY - "We thought we did! We got together all these recordings of unusual sound patterns, compared them..." He chuckles. "Cut them up and combined them into the 'Simfonia Col Do Ma Ma Daqua.'"

"Hm, that's not very scientific."

"Can I listen to it?"

BIRD'S NEST ROY - "That really wasn't the point. After the 'Simfonia' we moved onto the sounds of office supplies or something like that... and I doubt any of us would have been any good at pushing papers."

"Can I listen to it?"

BIRD'S NEST ROY - "Unfortunately, I don't have any recordings from my... old life. None at all! But I do have a tape with some ultrasonic sounds that *might* be what you're looking for." He starts rummaging through some tapes behind the counter.

KIM KITSURAGI - "Do we really have time for this?" the lieutenant whispers to you.

"Spin that bird song!"

"Yes, it's absolutely necessary for my research."

"Nah, that's okay. It's just that I heard the Col Do Ma Ma Daqua outside the Whirling, and I wanted to make sure I wasn't the only one... Let's talk about something else now."

BIRD'S NEST ROY - He dusts off a case, then takes out the tape and places it on the tape player. "This recording comes from down the coast... Wasn't looking to record anything specific -- just left a recording device there one morning."

"Keep in mind, I have to slow this one down enough to make sounds well over 200 kHz audible to the human ear... It will be... strange." He switches on the tape player. The speakers begin to emit a low hum....

As the hum grows louder, modulating, but always unnaturally, uncomfortably low, like it's coming not from the speakers, but also from inside your chest. Breathing is becoming difficult...

HALF LIGHT [Medium: Failure] - Not good, not good, you're about to start suffocating, you have to stop this...

-1 Health

INLAND EMPIRE [Easy: Success] - There's a growing sense of dread: the sound is coming from inside you but also surrounding you. It feels as though someone is standing just outside your range of vision and watching you, doing this to you...

BIRD'S NEST ROY - He nods to you reassuringly just as more diverse, higher-pitched sounds, some random, some appearing to form patterns, hit your eardrums.

"What's that?"

BIRD'S NEST ROY - "Gulls and skuas. But shhhh." He raises a pointer finger and inclines his head toward the speakers. A new, very high-pitched, shivering sound emerges amidst the others.

The low range of sounds is easier to handle with a focal point, but still troubling. You are mesmerized by the sounds, but also feel nausea welling up as the motif continues, then begins to recede, dissolving in what must be the sound of water lapping at the bank...

He switches off the tape player. "You know, now that I've listened to it on these new speakers -- it's *not* the Col Do Ma Ma Daqua. Wrong patterns, wrong... photons. Probably some insect trying to sing higher than its predators can hear. Still -- fascinating, aren't they, early morning sounds?"

+5 XP

7. "I have other business to take care of now." [Leave.]

Let's look around the pawnshop some more.

SAWED-OFF STREET LIGHT - A typical Martinaise street light sits among assorted floor and table lamps.

Let your gaze run over the street light.

"Is that a street light?"

"Where did you get this?"

"How much for the street light?"

There's nothing you need to know about the light. [Leave.]

SAWED-OFF STREET LIGHT - The light pole has been carefully cut, and the wiring has been redone and attached to a standard indoor plug. The light buzzes faintly but persistently.

CONCEPTUALIZATION [Medium: Success] - This would make quite a statement in your living room.

2. "Is that a street light?"

BIRD'S NEST ROY - "Yes, officer. As you can see, it's in perfect working order."

COMPOSURE [Medium: Success] - His manner is casual, but his speech is careful, measured. He wants you to know that he has nothing to hide.

3. "Where did you get this?"

BIRD'S NEST ROY - "It was brought to me to be altered."

KIM KITSURAGI - "We're not here to investigate the theft of city property." He leans in so the pawnbroker doesn't hear him.

"You have to admit, it's rather clever, what he's done with it." He pauses, studying the light.

4. "How much for the street light?"

BIRD'S NEST ROY - "Seven hundred reál. A bargain, I dare say."

"Are you out of your mind? There's one just like that on every corner!"

"Even taking into account the risk of obtaining the light, that seems a bit steep...."

"Seven hundred sounds about right. I imagine it wasn't easy sawing off that street lamp."

BIRD'S NEST ROY - "The light has undergone three transformations, and every transformation, large or small, has a price tag." He rests his elbows on the counter and brings his face closer to the glass.

"What do you mean, *transformations*?"

BIRD'S NEST ROY - "Well, there are the costs of removal and rewiring." He throws you a look of weary patience.

"But the most important transformation is the light's placement among ordinary *indoor* fixtures, which has adjusted its morphological field. The light became suitable for use inside the home just a few days ago."

CONCEPTUALIZATION [Medium: Success] - Okay. That checks out.

We will never, ever, be able to afford this. Unless we had some truly *esoteric* way of gathering money. Perhaps some *cryptic* form of currency.

6. There's nothing else you need to know about the light. [Leave.]

KNICK-KNACKS STAND - You see rows of toy soldiers guarding the rest of the trinkets displayed on the table: some on horseback, others in rags, others yet in bright blue uniforms. All are stern and unyielding in their duty.

INLAND EMPIRE [Easy: Success] - Try to find something pretty and cool here. Then use it to win her back!

Win 'her' back?

Inspect the knights on horseback.

Inspect the blue uniforms.

Inspect the figurines in rags.

[Interfacing - Medium 10] Dig up a truly *cool* figurine in the box under the table.

Step away from the table. [Leave.]

INLAND EMPIRE - Yes! Buy something nice! A figurine.

VOLITION [Easy: Success] - This sounds... off. You shouldn't trust this guy.

Inspect the knights on horseback.

KNICK-KNACKS STAND - Big men on big horses clad in lamellar armour and carrying flintlocks. The kind that would mow down a line of enemy soldiers in the blink of an eye.

(Point at the knights on horseback.) "Who are they?"

KIM KITSURAGI - "Franconigerian knights." He looks at the dusty figurines in the dim light. "I used to be very serious about these guys."

ESPRIT DE CORPS [Easy: Success] - ...a long, long time ago.

2. Inspect the blue uniforms.

KNICK-KNACKS STAND - They're not all blue. These figurines also wear gold coats and caps, complimented by orange trousers. They are variously posed, wielding swords and rifles with bayonets.

"Wait, this looks like René, the old guy who was playing petanque."

(Point at the blue figurines.) "Are these royalist soliders?"

KIM KITSURAGI - "This is what the loyalists looked like, yes." He inspects the figurine. "At first. Then they wised up and got camouflage."

(Point at the blue figurines.) "Are these royalist soldiers?"

BIRD'S NEST ROY - "Which ones?" The man peers from his glass box. "Ah, those! Yes, they are. I find the paint job a bit gaudy, but children like bright colours indiscriminately."

3. Inspect the figurines in rags.

KNICK-KNACKS STAND - This set of soldiers isn't meant to look impressive. A few have rifles, but most of them carry pistols -- some even shovels and tall sticks.

(Point at the figurines in rags.) "Are these even soldiers?"

BIRD'S NEST ROY - "You're probably talking about the revolutionaries, yes?" the man behind the glass answers. "Yes -- they are soldiers. Revolutionary soldiers."

"I think their poverty has been exaggerated for effect. When you place them next to the royalists, it doesn't seem like they could possibly win."

#disco elysium #kim kitsuragi #bird's nest roy #if you saw me post this before no you didn't.

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i-love-you-very-much · 6 months

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mutual 1: i fuckign love. peanous

mutual 2: does anyone else ever wonder what the fuck people mean when they say watches are powered by quartz?? i mean it's just a rock, it's not like radioactive or anything, it doesn't Actually emit an aura, right?? right????

mutual 3: rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats rats

mutual 4: [the most beautiful art of a character who spent 10 minutes onscreen in a missing 1960's doctor who episode]

mutual 5: i fuckign love. peanous

mutual 6: Piezoelectricity (/ˌpiːzoʊ-, ˌpiːtsoʊ-, paɪˌiːzoʊ-/, US: /piˌeɪzoʊ-, piˌeɪtsoʊ-/) is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat. It is derived from Ancient Greek πιέζω (piézō) 'to squeeze or press', and ἤλεκτρον (ḗlektron) 'amber' (an ancient source of electric current). The piezoelectric effect results from the linear electromechanical interaction between the mechanical and electrical states in crystalline materials with no inversion symmetry. The piezoelectric effect is a reversible process: materials exhibiting the piezoelectric effect also exhibit the reverse piezoelectric effect, the internal generation of a mechanical strain resulting from an applied electric field. For example, lead zirconate titanate crystals will generate measurable piezoelectricity when their static structure is deformed by about 0.1% of the original dimension. Conversely, those same crystals will change about 0.1% of their static dimension when an external electric field is applied. The inverse piezoelectric effect is used in the production of ultrasound waves. French physicists Jacques and Pierre Curie discovered piezoelectricity in 1880. The piezoelectric effect has been exploited in many useful applications, including the production and detection of sound, piezoelectric inkjet printing, generation of high voltage electricity, as a clock generator in electronic devices, in microbalances, to drive an ultrasonic nozzle, and in ultrafine focusing of optical assemblies. It forms the basis for scanning probe microscopes that resolve images at the scale of atoms. It is used in the pickups of some electronically amplified guitars and as triggers in most modern electronic drums. The piezoelectric effect also finds everyday uses, such as generating sparks to ignite gas cooking and heating devices, torches, and cigarette lighters.

mutual 7: anyone else a transgenger women on this fine wet beast wuesday

mutual 8: you know how you can pour liquid mercury into more liquid mercury and it becomes one thing of liquid mercury? why doesn't that happen with solids? why can't you place two gold bars on top of each other to make one really big gold bar? that doesn't make sense to me

mutual 9: i fuckign love. peanous

mutual 10: [30,000 reblogs of mutual 4's art]

mutual 11: who up thinkin about The Characters. i know i'm tbinking about The Characters. are you thinking abkut The Characters? you should be thinking about the The Characters

mutual 12: gideon the ninth more like giddy in the- (i am dragged offstage before you can hear what i could have possibly finished that sentence with)

mutual 13: Cold welding or contact welding is a solid-state welding process in which joining takes place without fusion or heating at the interface of the two parts to be welded. Unlike in fusion welding, no liquid or molten phase is present in the joint. Cold welding was first recognized as a general materials phenomenon in the 1940s. It was then discovered that two clean, flat surfaces of similar metal would strongly adhere if brought into contact while in a vacuum (see Van der Waals force). Newly discovered micro- and nano-scale cold welding has shown potential in nanofabrication processes.

Richard Feynman: "The reason for this unexpected behavior is that when the atoms in contact are all of the same kind, there is no way for the atoms to "know" that they are in different pieces of copper. When there are other atoms, in the oxides and greases and more complicated thin surface layers of contaminants in between, the atoms "know" when they are not on the same part." — Richard Feynman, The Feynman Lectures on Physics, 12–5 Friction

mutual 14: hey didn't you work on the manhattan project. hey y'all callout post for Richard Feynman, mutual 13 (for talking about something related to him), mutual 8 (for asking about something related to him), and mutual 7 (for being a trans woman on a post next to where all of this was happening). they're all terrible horrible unforgivable people and-

Are you sure you want to block mutual 14 from seeing your posts?

nevermind block

mutual 15: i fuckign love. boobs [breasts image]

#iloveyou.pdf #anyway. curate your dash folks #long post #always wanted to make one of these but i think i went a lil too much with it #thank you wikipedia my beloved wikipedia. i am copypasting yuo somuch 💖

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stevebattle · 1 year

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Denning MRV-2 Modular Research Vehicle (1984) by Denning Mobile Robotics, Woburn, Massachusetts. The MRV-2 is a medium sized research platform capable of locomotion on flat and smooth surfaces such as office floors. The robot in the top photo is Georgia Tech's 'Stimpy', which can also be seen in the lower photo (back-right) along with 'Ren' (back-left) with the robot arm attached. Ren & Stimpy are three-wheeled holonomic vehicles. Shaft encoders provide information about the orientation of the robot and the distance traversed from the initial location. A ring of 24 ultrasonic sensors enable the detection of both static and moving obstacles, provided they're moving at a slower rate than both the processing cycle and motor actuation times of the robot. A LaserNav bar-code reader allows the robot to detect distinctive places or landmarks that have been suitably identified with stick-on bar-codes. The final image shows the synchro-drive mechanism, with an outer steering belt and inner drive belt coordinating the steering and driving of all three wheels, using just two motors.

#cybernetics #mobile robot #robot #1984 #synchro

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archivist-crow · 7 months

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This gorgeous thing is the 1970s-era Zenith Space Command remote control. It was the first TV remote control I had ever seen, and it is the only one I think about fondly. Brilliant in concept and satisfying to use, the Space Command utilized an analog process. When you pressed one of the buttons, which made a pleasing metallic click, a small spring-loaded hammer would strike one of the corresponding metal rods, sending an ultrasonic signal to the TV set. Since there were only four buttons and only one for volume (on/off, volume, channel up, and channel down), the volume could only go up incrementally, then on the fourth click it would reset at the lowest volume. This is one of the first things I think about when people talk about good industrial design. It actually felt and looked like something out of Star Trek, which just made it even cooler.

For more about its history, here’s an article about it:

#design #industrial design #tv remote #zenith space command

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taperwolf · 3 months

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So this is another Eurorack patch using external devices: here, my homemade cracklebox.

I built this thing quite a while ago; it's a copy of the classic STEIM Krakadoos design. Its oscillator exploits bugs in the design of the ancient μA709 op amp chip to produce squelchy and crackling sounds when you touch the brass buttons on the left hand side. I've been intending to supplement the audio output jack on it, which is directly wired into the discrete amplifier circuit, with an output transformer; I've been told that doing that will make it so that plugging it into something doesn't couple that amplifier to the internals and change the sound.

But I decided tonight that before making any modifications, I should try plugging it into the sync input of my VCO 3340. This audio clip is the result: a solid chip oscillator being intimately tied to a weirdo.

The original zwoopy bounce is the patch as it stands without sync added, and then I turn the Cracklebox on, soft-syncing the VCO first with the ultrasonic base waveform of the Cracklebox, and then going through varying pressure on different patterns of touch knobs. I flip the Cracklebox off in the middle and switch to hard sync before going through the process again.

#modular synth #eurorack #synth diy #cracklebox

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usafphantom2 · 2 months

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If the cabin pressure were lost at the speed and altitude they commonly flew, their blood would boil.

This was my father's job flying the SR 71 as RSO for 8 1/2 years when I was growing up.

Let’s talk about the windows in the SR-71. The severe heat the windshield of the SR-71 would experience at top speeds. Skunk Works Designers ultimately decided that using quartz for the windshield was the best way to prevent any blur or window distortion under these conditions, so they ultrasonically fused the quartz to the aircraft's titanium hull to make the quietest cockpit possible; the estimated temperature of the outside of the cockpit of 600° F.

The integrity of the double quartz camera window demanded special attention because optical distortion caused by the effect of great heat (600 degrees F.) on the outside of the window and a much lower temperature (150 degrees F.) on the inside could keep the cameras from taking usable photographs. Three years and $2 million later, the Corning Glass Works came up with a solution: the window was fused to its metal frame by a novel process using high frequency sound waves. Source thesr71blackbird.com/History/CIA/a-…

Linda Sheffield Miller

Photo credit: Curt Mason

@Habubrats71 via X

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ymdtitanium · 1 month

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