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This is how a human finger interacts with a 60GHz electromagnetic wave! A mm wave radar can precisely track and capture the smallest kind of motion! Simulated in #openEMS and rendered in #blender3d ! Dave Jones hackaday #radar #Engineering #physics #Science #education #b3d #electronics Altium KiCad PCB Elmer FEM...

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Sam M

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29,586 Aufrufe • vor 3 Jahren •via X (Twitter)

Bildung#openEMS#blender3d#radar#Engineering#physics#Science#education#b3d
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The PCB’s in today’s smartphones contain an ever-increasing density of components and integration. The iPhone uses “Substrate-Like” PCB technology to achieve impressive levels of component density, everything is so closely packed, and no space is wasted. With this PCB technology, a "PCB sandwich" could be made by creating cavities in an FR4 PCB substrate and then stacking another PCB on top to form a lid, the “walls” formed by the cavities can be plated and then used as interconnects. This is similar to hollowing out the inside of a loaf of bread and then filling it with cheese & ingredients – or components in this case! Standard FR4 substrates A clever and smart PCB technology for the modern smartphone. Apple has been using Substrate-Like PCBs since the iPhone X and has been evolving and iterating it with every new iPhone release. It will be interesting to see how this concept is implemented now with the new iPhone 15, looking forward to seeing iFixit next teardown! #b3d #blender3d #geometrynodes #iPhone15Pro #iPhone15 #simulation #electronics #Engineering #hardware #Smartphones #science #kicad #altium #freecad #Eevee #pcbdesign #manufacturing #technology #art
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The PCB’s in today’s smartphones contain an ever-increasing density of components and integration. The iPhone uses “Substrate-Like” PCB technology to achieve impressive levels of component density, everything is so closely packed, and no space is wasted. With this PCB technology, a "PCB sandwich" could be made by creating cavities in an FR4 PCB substrate and then stacking another PCB on top to form a lid, the “walls” formed by the cavities can be plated and then used as interconnects. This is similar to hollowing out the inside of a loaf of bread and then filling it with cheese & ingredients – or components in this case! Standard FR4 substrates A clever and smart PCB technology for the modern smartphone. Apple has been using Substrate-Like PCBs since the iPhone X and has been evolving and iterating it with every new iPhone release. It will be interesting to see how this concept is implemented now with the new iPhone 15, looking forward to seeing iFixit next teardown! #b3d #blender3d #geometrynodes #iPhone15Pro #iPhone15 #simulation #electronics #Engineering #hardware #Smartphones #science #kicad #altium #freecad #Eevee #pcbdesign #manufacturing #technology #art

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Aladdin Just Entered the Air Superiority Chat Somewhere over the desert… An F-22 Raptor is cruising at Mach speed… carrying some of the most advanced radar, avionics, and stealth technology ever built by human hands. Two Pratt & Whitney F119 engines pushing nearly 70,000 pounds of thrust. Supercruise. Thrust vectoring. Stealth geometry designed to disappear from radar. A flying masterpiece of American engineering. And then… Out of nowhere… Aladdin shows up on a flying carpet with an AK-47. No radar. No targeting system. No avionics. Just vibes… determination… and a magic rug doing about 40 miles per hour with a tailwind. The Raptor pilot looks down and probably says: “Control… you’re not going to believe this.” Meanwhile Aladdin is leaning off the carpet yelling: “COME BACK HERE!” Sometimes you just have to laugh at this Ai… Even the most advanced fighter jet in the world isn’t safe from a determined guy on a magic carpet. #SilentMajoritySpeaks #AStoneGroove
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Aladdin Just Entered the Air Superiority Chat Somewhere over the desert… An F-22 Raptor is cruising at Mach speed… carrying some of the most advanced radar, avionics, and stealth technology ever built by human hands. Two Pratt & Whitney F119 engines pushing nearly 70,000 pounds of thrust. Supercruise. Thrust vectoring. Stealth geometry designed to disappear from radar. A flying masterpiece of American engineering. And then… Out of nowhere… Aladdin shows up on a flying carpet with an AK-47. No radar. No targeting system. No avionics. Just vibes… determination… and a magic rug doing about 40 miles per hour with a tailwind. The Raptor pilot looks down and probably says: “Control… you’re not going to believe this.” Meanwhile Aladdin is leaning off the carpet yelling: “COME BACK HERE!” Sometimes you just have to laugh at this Ai… Even the most advanced fighter jet in the world isn’t safe from a determined guy on a magic carpet. #SilentMajoritySpeaks #AStoneGroove

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When a nuclear reactor is switched on for the first time, an intense, almost hypnotic blue glow appears in the water surrounding the reactor core. This light is neither fire nor heat; it is Cherenkov radiation, a physical phenomenon that occurs when charged particles, such as high-energy electrons produced during nuclear fission, travel through a transparent medium faster than light can propagate within that same medium. While nothing can exceed the speed of light in a vacuum, light travels more slowly in materials like water. When a charged particle surpasses this reduced speed, it emits a coherent shock-like electromagnetic wave, often described as an optical analogue of a sonic boom. This radiation produces the distinctive blue glow. The colour arises because Cherenkov radiation is strongest at shorter wavelengths, which are dominated by blue and ultraviolet light. The phenomenon was first observed experimentally in 1934 and later explained theoretically, work that led to the Nobel Prize in Physics in 1958. Its explanation confirmed how relativity and electromagnetism operate in material media. Today, this deep blue light is both a warning and a scientific tool. It signals the presence of intense ionising radiation, while also being exploited in particle detectors, nuclear reactors, and neutrino observatories. It provides a rare, visible manifestation of subatomic processes that are otherwise hidden from direct human perception. #GottaLovePhysics #Physics
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When a nuclear reactor is switched on for the first time, an intense, almost hypnotic blue glow appears in the water surrounding the reactor core. This light is neither fire nor heat; it is Cherenkov radiation, a physical phenomenon that occurs when charged particles, such as high-energy electrons produced during nuclear fission, travel through a transparent medium faster than light can propagate within that same medium. While nothing can exceed the speed of light in a vacuum, light travels more slowly in materials like water. When a charged particle surpasses this reduced speed, it emits a coherent shock-like electromagnetic wave, often described as an optical analogue of a sonic boom. This radiation produces the distinctive blue glow. The colour arises because Cherenkov radiation is strongest at shorter wavelengths, which are dominated by blue and ultraviolet light. The phenomenon was first observed experimentally in 1934 and later explained theoretically, work that led to the Nobel Prize in Physics in 1958. Its explanation confirmed how relativity and electromagnetism operate in material media. Today, this deep blue light is both a warning and a scientific tool. It signals the presence of intense ionising radiation, while also being exploited in particle detectors, nuclear reactors, and neutrino observatories. It provides a rare, visible manifestation of subatomic processes that are otherwise hidden from direct human perception. #GottaLovePhysics #Physics

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The United States Military is using Shield AI to track people who are calling out this biological convergence of humans and electronics/synthetic biology (human embedded system) in real-time from drones, turning raw data into actionable intelligence with speed and efficiency. The company Shield AI was founded by Brandon Tseng (a former Navy SEAL), his brother Ryan Tseng (a former entrepreneur and Qualcomm executive), and Andrew Reiter (an engineer who had worked on computer vision applications for Draper Labs, a non-profit advanced engineering company). The company has contracts with the Department of Defense and the Department of Homeland Security.
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The United States Military is using Shield AI to track people who are calling out this biological convergence of humans and electronics/synthetic biology (human embedded system) in real-time from drones, turning raw data into actionable intelligence with speed and efficiency. The company Shield AI was founded by Brandon Tseng (a former Navy SEAL), his brother Ryan Tseng (a former entrepreneur and Qualcomm executive), and Andrew Reiter (an engineer who had worked on computer vision applications for Draper Labs, a non-profit advanced engineering company). The company has contracts with the Department of Defense and the Department of Homeland Security.

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🚨 SCIENTISTS JUST PRINTED A FULLY FUNCTIONAL ELECTRONIC SENSOR DIRECTLY ONTO A LIVING LEAF. Researchers have developed a technique to print electronics onto living biological surfaces including plant leaves, animal bones, and potentially human tissue without damaging them. In one striking demonstration, they printed a wireless humidity sensor directly onto a living leaf. The printed silver spiral antenna and circuitry remained functional while the leaf stayed alive. Why this matters: Traditional electronics are rigid and separate from biology. This new approach allows electronics to be directly integrated with living systems. Potential applications include smart medical implants that grow with tissue, real-time health monitoring devices printed onto bone or skin, and even “smart plants” that can report environmental data. It moves far beyond printing plastic prototypes this is functional electronics on living matter. The technique represents a major step in bio-integrated electronics and additive manufacturing. Instead of inserting devices into the body or environment, researchers can now print them onto living surfaces with high precision. This opens the door to entirely new classes of devices: living sensors, bio-hybrid robots, and medical implants that interface more naturally with the body. How do you think printing electronics onto living tissue will change medicine or environmental monitoring in the next decade?

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What if aircraft were built like open-source software? Project Caribou is an ambitious open-source effort to build a 200 kg-class heavy-lift hexacopter that anyone can study, improve, and contribute to. The long-term goal is to accelerate the development of larger open-source aircraft and eVTOL platforms. The project targets a ~200 kg maximum takeoff weight with an ~100 kg payload, uses an 18S power architecture, and is built around an ArduPilot-based flight stack. The repository includes CAD models, PCB designs, documentation, and engineering workflows that are evolving in the open. If you are interested in drones, aerospace, robotics, or embedded systems, this is one of the most exciting open-source engineering projects to follow.

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While the US finally had a break from tornadoes, it was CANADA that surprised many when it dropped a wedge tornado near Shoal Lake, Manitoba yesterday evening. In this radar loop, you can see where this tornado's origins came from starting with the outflow boundary (the line of weak reflectivity values the storm pops out from to the east of the radar site). Outflow boundaries concentrate extreme low-level rotation and force rapid upward motion, such that when supercells interact with these boundaries, the pre-existing spin can be stretched into tornadoes. These can happen super fast, and it remains something we don't fully understand. In the span of 30 minutes, we went from there being no discernible storm to there being a wedge on the ground, without a mesocyclone or a nudger. What is even more amazing is that despite Canada's radars being lower-resolution compared to what we have in the US, you can still quite clearly see the hook echo and the eventual debris ball that forms on reflectivity. Luckily, no injuries or fatalities have been confirmed from this tornado at this time.

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🚨 THE RACE TO 6G JUST ACCELERATED. Northrop Grumman has developed a W-band GaN chip operating at up to 110 GHz and took it from concept to market-ready hardware in less than six months. The new gallium nitride chip operates in the W-band (75–110 GHz), a frequency range that delivers massive bandwidth, extremely high data rates, and much lower latency than current systems. What makes this impressive is the speed: the chip went from concept to market-ready hardware in less than six months through a U.S. government-backed microelectronics program. That’s unusually fast for advanced defense-grade semiconductors. The chip acts as a high-power signal amplifier that can strengthen wireless links while shrinking the size and power consumption of the hardware. It’s designed for military radar, secure satellite communications, and the coming wave of 6G networks. Why this matters: • W-band offers far more spectrum than current 5G bands, enabling much faster data transmission and higher-resolution sensing • Gallium nitride can handle significantly higher power and frequencies than silicon, making it ideal for these demanding applications • The rapid development cycle shows how public-private collaboration can accelerate critical semiconductor technologies • The same tech that strengthens military radar and satellite links will directly feed into future commercial 6G infrastructure The deeper implication: We’re watching the foundation of next-generation wireless and sensing systems being laid in real time. High-frequency GaN chips like this won’t just improve existing radar and satellite systems they’re likely to become core building blocks for 6G, autonomous systems, and advanced defense platforms. The fact that this moved from lab to market in under six months suggests the pace of high-frequency electronics is accelerating dramatically. The future of wireless isn’t just faster. It’s operating at frequencies most people have never heard of and it’s being built right now. How soon do you think W-band and GaN technology will start appearing in everyday 6G devices? Follow for more frontier semiconductors, defense tech, and next-generation wireless systems.

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E pluribus unum – “out of many, one” – is not only a motto for the United States. It’s a good credo for microrobots. A research collaboration between Cornell and the Max Planck Institute for Intelligent Systems has shown how a swarm of microrobots spinning on a water surface can together generate the fluidic torque needed to manipulate passive structures without any physical contact. This collective behavior was demonstrated to operate gears and move objects, with the aim of eventually performing microscale tasks and biomedical procedures. “At small scales, contact-based manipulation can be limiting, and flow-based manipulation offers a great alternative,” said Kirstin Petersen, associate professor and an Aref and Manon Lahham Faculty Fellow in the Department of Electrical and Computer Engineering in Cornell Duffield College of Engineering and the paper’s co-senior author. “We’re showing that in spite of their size, adding more microrobots creates stronger flows and greater torque transfer.” The research published Feb. 25 in Science Advances. The lead author is Steven Ceron, Ph.D. ’22, now an assistant professor at the University of Michigan. More:

Cornell University

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Exploding Mic Debunked... Again, By Basic Physics Newton’s 3rd Law is non negotiable: for every action, there is an equal and opposite reaction. If the microphone allegedly exploded with enough force to kill a man, the mic itself should have been violently blasted away from the direction of the supposed blast. Instead, it travels in the same direction as the alleged explosion. That’s not how physics works. And that’s before we even get to the rest of the fantasy: • No flash • No smoke • No burn marks on skin or clothing • A thin white t-shirt somehow contains a lethal blast wave with zero tearing or residue • The weak Rode magnetic mount stays perfectly attached Every single one of these details is physically impossible for a real explosive event. This is high-school physics and observable reality. The "Exploding Mic" is an IQ test.

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🚨QUANTUM🚨: A brand new quantum state just appeared that links two fields we thought were separate 🧨 Scientists at Rice University have discovered a new quantum state of matter that connects quantum criticality — where electrons fluctuate between different phases — with electronic topology, which describes organized wave-like behavior of electrons. This hybrid state could open new paths for advanced computing, sensing, and materials. Source: Rice University news release on a study published in Nature Physics (January 2026). Uniphics explains this emergence directly through spin-wave dynamics in the ξM-field. Each Gyrotron is a stable 3D gyroscope formed by three orthogonal spin quanta — every quantum a tempest of whirling energy spinning clockwise or counterclockwise in its own plane. When local energy density and spin bias allow mixed configurations (similar to the musktron and maleytron patterns), the resulting spin-wave interference naturally produces both critical fluctuations and topological order at the same time. Negentropy favors these hybrid states because they represent lower-energy, organized patterns within the field. No new particles or exotic couplings are needed; the same principles that govern particle formation, the weak and strong forces through spin alignments, and the low-acceleration gravitational surge also allow these combined quantum behaviors in real materials when conditions permit. This turns the “unexpected new quantum state” into a predicted outcome of spin-wave physics once the three pillars are allowed to select stable hybrid configurations. How might recognizing that hybrid quantum states arise from mixed spin-wave interference change the way we search for new materials or design future quantum technologies? A Theory of Everything should be able to answer everything. Uniphics Explained Simply PDF: Chapters 1–10 free: Grokipedia #Uniphics #QuantumStates #SpinWaves #Topology #QuantumCriticality Grok xAI

Paul Maley

22,669 Aufrufe • vor 3 Monaten

11.328: INF Cody Miller 5’11 | 178 lbs | R/R | 20yo • East Tennessee State .331/.430/.623/1.052, .457 wOBA, 10% BB/12% K, 135 wRC+ Super under-the-radar prospect. Scrappy, does a job type of guy. Limits Ks, draws walks, plays SS but can move around the infield and occasionally has gotten OF reps. Rakes a ton without question – has a nice track record of hitting at both the collegiate level with ETSU and in summer ball (APPY/NECBL) as well. Big development this year: power. Hit a combined 6 HRs in over 700 ABs between college and summer ball… he had EIGHTEEN this year alone! And there’s more of that when he inevitably adds muscle with help of pDev. This is one of those guys who nobody talks about and all of a sudden sprouts into a quality big league player.
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11.328: INF Cody Miller 5’11 | 178 lbs | R/R | 20yo • East Tennessee State .331/.430/.623/1.052, .457 wOBA, 10% BB/12% K, 135 wRC+ Super under-the-radar prospect. Scrappy, does a job type of guy. Limits Ks, draws walks, plays SS but can move around the infield and occasionally has gotten OF reps. Rakes a ton without question – has a nice track record of hitting at both the collegiate level with ETSU and in summer ball (APPY/NECBL) as well. Big development this year: power. Hit a combined 6 HRs in over 700 ABs between college and summer ball… he had EIGHTEEN this year alone! And there’s more of that when he inevitably adds muscle with help of pDev. This is one of those guys who nobody talks about and all of a sudden sprouts into a quality big league player.

G.G.

20,158 Aufrufe • vor 1 Jahr

This is the mechanical heart of every flight deck. At the core of this instrument is a high-speed mechanical gyroscope held within a series of gimbals. It relies on the physics of rigidity in space, meaning the spinning disc stays perfectly aligned with the Earth's horizon regardless of how the aircraft moves around it. When you see the outer casing tilt and dive, you are actually watching the plane move while the instrument stays perfectly still. For decades, this was the primary way pilots survived flying through thick cloud cover or at night. Without a visible horizon, the human brain can easily become disoriented, leading to a deadly condition called the graveyard spin. This device provides an objective visual reference that never fails, even if the entire electrical system of the plane goes dark. While modern airliners have transitioned to digital screens and solid-state sensors, these analog units remain critical. Many pilots still prefer them as a fail-safe backup because they operate on pure physics rather than software. It is a masterclass in engineering that remains just as relevant in the age of automation as it was eighty years ago. It is a timeless piece of safety technology. Would you trust a mechanical dial over a digital screen? Follow for more Technology updates Video: alternateb747
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This is the mechanical heart of every flight deck. At the core of this instrument is a high-speed mechanical gyroscope held within a series of gimbals. It relies on the physics of rigidity in space, meaning the spinning disc stays perfectly aligned with the Earth's horizon regardless of how the aircraft moves around it. When you see the outer casing tilt and dive, you are actually watching the plane move while the instrument stays perfectly still. For decades, this was the primary way pilots survived flying through thick cloud cover or at night. Without a visible horizon, the human brain can easily become disoriented, leading to a deadly condition called the graveyard spin. This device provides an objective visual reference that never fails, even if the entire electrical system of the plane goes dark. While modern airliners have transitioned to digital screens and solid-state sensors, these analog units remain critical. Many pilots still prefer them as a fail-safe backup because they operate on pure physics rather than software. It is a masterclass in engineering that remains just as relevant in the age of automation as it was eighty years ago. It is a timeless piece of safety technology. Would you trust a mechanical dial over a digital screen? Follow for more Technology updates Video: alternateb747

Mechanical Knowledge

68,004 Aufrufe • vor 5 Monaten

HEAT WAVE: ARE MAMDANI'S SOCIALIST POLICIES WORKING FOR NEW YORKERS ROASTING IN THIS HEAT WAVE? New York just lived through one of its hottest stretches in over a decade. This is exactly when leadership gets tested. Mamdani's answer was a thermostat suggestion. Set your AC to seventy eight degrees. Turn off your lights. Unplug what you can. Meanwhile in Riverdale, a Bronx neighborhood with a large Jewish community, Con Edison simply cut the power. Thousands of families sat in the dark and the heat while the mayor asked everyone else to sacrifice a little more. You cannot conserve your way out of a grid that cannot carry the load. That is not a talking point. That is physics. New York shut down Indian Point, its reliable nuclear plant, and leaned hard into wind and solar promises. Now the hottest week of the year arrives and the lights go out in the Bronx. Socialism always sounds generous in a speech. It looks very different when your refrigerator stops running and your kids cannot sleep through a heat emergency. The mayor who built his campaign on standing up for working class neighborhoods just watched a working class neighborhood lose power while a celebrity wedding lit up Madison Square Garden across town. That contrast writes itself. Nobody needed to manufacture it. Good intentions do not keep a refrigerator cold. Reliable power does. New Yorkers just found out the hard way which one their mayor actually delivered.
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HEAT WAVE: ARE MAMDANI'S SOCIALIST POLICIES WORKING FOR NEW YORKERS ROASTING IN THIS HEAT WAVE? New York just lived through one of its hottest stretches in over a decade. This is exactly when leadership gets tested. Mamdani's answer was a thermostat suggestion. Set your AC to seventy eight degrees. Turn off your lights. Unplug what you can. Meanwhile in Riverdale, a Bronx neighborhood with a large Jewish community, Con Edison simply cut the power. Thousands of families sat in the dark and the heat while the mayor asked everyone else to sacrifice a little more. You cannot conserve your way out of a grid that cannot carry the load. That is not a talking point. That is physics. New York shut down Indian Point, its reliable nuclear plant, and leaned hard into wind and solar promises. Now the hottest week of the year arrives and the lights go out in the Bronx. Socialism always sounds generous in a speech. It looks very different when your refrigerator stops running and your kids cannot sleep through a heat emergency. The mayor who built his campaign on standing up for working class neighborhoods just watched a working class neighborhood lose power while a celebrity wedding lit up Madison Square Garden across town. That contrast writes itself. Nobody needed to manufacture it. Good intentions do not keep a refrigerator cold. Reliable power does. New Yorkers just found out the hard way which one their mayor actually delivered.

Bill Mitchell

240,901 Aufrufe • vor 1 Monat

🚨 SCIENTISTS JUST BUILT A WIRE THAT IS ONLY ONE ATOM WIDE. Researchers have created linear carbon atomic chains essentially a string of carbon atoms bonded in a straight line suspended between two gold electrodes, and directly observed how electrons travel through them. These chains are one of the most extreme forms of matter: a true 1D carbon structure with extraordinary stiffness and unique electronic behavior. In this setup, electrons can travel through the chain in ways that reveal quantum effects not seen in conventional materials. Why this matters: • Linear carbon chains are predicted to be the strongest material known, stronger even than graphene or carbon nanotubes • They offer a platform to study true one-dimensional physics and quantum transport at the atomic scale • Understanding charge flow through single-atom chains could help design future molecular-scale electronics • The gold-carbon-gold junction acts like a prototype for atomic-scale wires and switches The deeper implication: We are now building and testing electronics at the ultimate limit of miniaturization literally one atom wide. These experiments don’t just push the boundaries of what’s physically possible; they give us a window into how matter behaves when reduced to a single dimension. The rules that govern bulk materials break down here, and new quantum phenomena emerge. This kind of work lays the groundwork for a future where electronic devices are engineered atom by atom rather than fabricated in bulk. We’re moving from “smaller transistors” to “wires made of single atoms.” How close do you think we are to practical molecular or atomic-scale electronics becoming reality? Follow for more frontier nanotechnology, quantum transport, and atomic-scale materials research.
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🚨 SCIENTISTS JUST BUILT A WIRE THAT IS ONLY ONE ATOM WIDE. Researchers have created linear carbon atomic chains essentially a string of carbon atoms bonded in a straight line suspended between two gold electrodes, and directly observed how electrons travel through them. These chains are one of the most extreme forms of matter: a true 1D carbon structure with extraordinary stiffness and unique electronic behavior. In this setup, electrons can travel through the chain in ways that reveal quantum effects not seen in conventional materials. Why this matters: • Linear carbon chains are predicted to be the strongest material known, stronger even than graphene or carbon nanotubes • They offer a platform to study true one-dimensional physics and quantum transport at the atomic scale • Understanding charge flow through single-atom chains could help design future molecular-scale electronics • The gold-carbon-gold junction acts like a prototype for atomic-scale wires and switches The deeper implication: We are now building and testing electronics at the ultimate limit of miniaturization literally one atom wide. These experiments don’t just push the boundaries of what’s physically possible; they give us a window into how matter behaves when reduced to a single dimension. The rules that govern bulk materials break down here, and new quantum phenomena emerge. This kind of work lays the groundwork for a future where electronic devices are engineered atom by atom rather than fabricated in bulk. We’re moving from “smaller transistors” to “wires made of single atoms.” How close do you think we are to practical molecular or atomic-scale electronics becoming reality? Follow for more frontier nanotechnology, quantum transport, and atomic-scale materials research.

TheNewPhysics

31,491 Aufrufe • vor 2 Monaten

🚨 BREAKING: NVIDIA just announced the Isaac GR00T Reference Humanoid Robot. The first fully open humanoid robot reference design built on Jetson Thor, and it's going straight to the world's top research institutions. This is Jensen Huang's bet on open physical AI infrastructure. The hardware stack is serious: → Unitree H2 Plus chassis, 6 feet tall, 150 pounds, 31 degrees of freedom → Sharpa Wave tactile five-finger hands, 22 degrees of freedom, bringing total to 75 across the full body → NVIDIA Jetson AGX Thor onboard compute, 2,070 FP4 teraflops of AI performance, 128GB unified memory → Multi-view sensing, stereo head camera, wrist cameras, IMU Alongside this announcement, Unitree also introduced the H2 Plus as a standalone product, a frontier humanoid combining Unitree's own body, Sharpa's five-finger hands and NVIDIA Robotics Jetson Thor compute into one fully integrated research platform. The full Isaac GR00T software stack ships with it, teleoperation for data capture, open foundation models, Isaac Sim for training, Isaac Lab for evaluation, and accelerated ROS middleware for deployment. The complete loop from data to real-world robot in one unified platform. ETH Zürich, Stanford Robotics Center, UC San Diego and Ai2 are already on board as launch research partners. NVIDIA Robotics did to AI what it's now doing to robotics, build the platform, open the ecosystem, let the world build on top of it. Whoever owns the infrastructure layer wins. NVIDIA knows this better than anyone. 👀 Read more here: ~~ ♻️ Join the weekly robotics newsletter, and never miss any news →
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🚨 BREAKING: NVIDIA just announced the Isaac GR00T Reference Humanoid Robot. The first fully open humanoid robot reference design built on Jetson Thor, and it's going straight to the world's top research institutions. This is Jensen Huang's bet on open physical AI infrastructure. The hardware stack is serious: → Unitree H2 Plus chassis, 6 feet tall, 150 pounds, 31 degrees of freedom → Sharpa Wave tactile five-finger hands, 22 degrees of freedom, bringing total to 75 across the full body → NVIDIA Jetson AGX Thor onboard compute, 2,070 FP4 teraflops of AI performance, 128GB unified memory → Multi-view sensing, stereo head camera, wrist cameras, IMU Alongside this announcement, Unitree also introduced the H2 Plus as a standalone product, a frontier humanoid combining Unitree's own body, Sharpa's five-finger hands and NVIDIA Robotics Jetson Thor compute into one fully integrated research platform. The full Isaac GR00T software stack ships with it, teleoperation for data capture, open foundation models, Isaac Sim for training, Isaac Lab for evaluation, and accelerated ROS middleware for deployment. The complete loop from data to real-world robot in one unified platform. ETH Zürich, Stanford Robotics Center, UC San Diego and Ai2 are already on board as launch research partners. NVIDIA Robotics did to AI what it's now doing to robotics, build the platform, open the ecosystem, let the world build on top of it. Whoever owns the infrastructure layer wins. NVIDIA knows this better than anyone. 👀 Read more here: ~~ ♻️ Join the weekly robotics newsletter, and never miss any news →

Lukas Ziegler

16,062 Aufrufe • vor 2 Monaten

"But where's the flash?" Watch this CNN demonstration of 6g of PETN being ignited by open flame. What happens? The PETN burns with a visible flame for several seconds. Then it detonates. The detonation happens so fast there is no visible flash — the camera goes straight from fire to debris field. And here's the key: the fire that WAS there is blown OUT by the blast wave. This is not a shaped charge. This is unconfined PETN in open air. No flash. No fireball. The blast wave actually extinguishes the existing flame. Why? Three reasons: PETN's reaction zone is measured in microns and completes in nanoseconds (Anderson et al., Propellants Explosives Pyrotechnics, 2022). At gram scale, the entire detonation event is over in single-digit microseconds. A 30fps camera captures 33,000 μs per frame. The event occupies <0.03% of one frame. The visible "flash" people expect from explosions comes from compression-heating of surrounding air — not the explosive itself. At gram scale there simply isn't enough gas volume being heated to produce visible light that registers on a standard camera. In a shaped charge, it's even less visible because the energy is directed INTO the target as a hydrodynamic metal jet (Munroe effect), not radiated outward as heat and light. The Hezbollah pager attacks (Sept 2024) used 3-6g PETN per device. Watch the CCTV footage — no fireballs. Just a pop and casualties. Sandia National Labs detonates ~32mg PETN and researchers stand next to the chamber in safety glasses. No flash. No fire. "No flash = no explosive" is a Hollywood education, not a physics one. Joe Rogan shaw
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"But where's the flash?" Watch this CNN demonstration of 6g of PETN being ignited by open flame. What happens? The PETN burns with a visible flame for several seconds. Then it detonates. The detonation happens so fast there is no visible flash — the camera goes straight from fire to debris field. And here's the key: the fire that WAS there is blown OUT by the blast wave. This is not a shaped charge. This is unconfined PETN in open air. No flash. No fireball. The blast wave actually extinguishes the existing flame. Why? Three reasons: PETN's reaction zone is measured in microns and completes in nanoseconds (Anderson et al., Propellants Explosives Pyrotechnics, 2022). At gram scale, the entire detonation event is over in single-digit microseconds. A 30fps camera captures 33,000 μs per frame. The event occupies <0.03% of one frame. The visible "flash" people expect from explosions comes from compression-heating of surrounding air — not the explosive itself. At gram scale there simply isn't enough gas volume being heated to produce visible light that registers on a standard camera. In a shaped charge, it's even less visible because the energy is directed INTO the target as a hydrodynamic metal jet (Munroe effect), not radiated outward as heat and light. The Hezbollah pager attacks (Sept 2024) used 3-6g PETN per device. Watch the CCTV footage — no fireballs. Just a pop and casualties. Sandia National Labs detonates ~32mg PETN and researchers stand next to the chamber in safety glasses. No flash. No fire. "No flash = no explosive" is a Hollywood education, not a physics one. Joe Rogan shaw

Jon Bray

25,456 Aufrufe • vor 4 Monaten