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Genesis 🎩🪄 Abacab (1981) 🔊 Let’s close out winter on a high note with Phil Collins & Genesis, sharp, bold, and ahead of its time. Synth-driven groove, stripped-down edge, pure early ‘80s energy. #HappyThursday😎

14,822 次观看 • 6 个月前 •via X (Twitter)

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End of an era. Nearly six years ago, trent.sol and I were sitting in Greg Fitzgerald 's basement ordering computer parts on Newegg to hand-build the first metal validators for Solana. Mainnet was still a ways away, hardware and network requirements were unknown, docs, tools and best practices were nonexistent. Even Testnet was barely more than a periodic bringup of a handful of cloud VMs. Our tiny but mighty early validator community were basically all on a first name basis with one another. A few months later, Trent and I, along with a couple other early Solana Labs employees, racked the resulting 7 machines in a data center in Denver. These were the first ever colocated nodes to serve Solana. In early 2020, we used these glowing green machines to help serve the genesis block and launch Solana Mainnet into the world. Today, the data center that houses them is shutting down. Trent and I went over this morning to tear out the rack to discover we were the last remaining tenants in a now otherwise abandoned facility, with apparently a single staff member left on hand. It was a little emotional for me to see these shut down, even though they haven't been active on the network for a very long time, having been repurposed for development work a while back. It's always humbling to reflect on how far Solana has come in so little time - taking down a handful of old, wonky hand-assembled boxes from the genesis days and considering today's huge global reach of the network, the devs, the products, and especially, all of you. Thank you all for being along with us on the wildest ride.

Dan Albert

183,193 次观看 • 1 年前

Taming the Edge: How lithium could help us control #fusion plasmas. This video captures the first flashes of lithium being injected into the #plasma of our ST40 tokamak, marking the start of our exploration into its effects. Why lithium? In fusion research, we aim for H-mode, a high-performance state with improved plasma confinement. Future fusion power plants are expected to operate in this mode. But H-mode brings a challenge: ELMs (Edge Localised Modes) are bursts of energy at the plasma edge, similar to mini solar flares. These can reduce plasma temperature and damage the divertor with intense heat and particles. Pioneering work by PPPL and others has shown that lithium can suppress ELMs and increase energy confinement time, leading to higher temperatures. On ST40, we’re currently injecting lithium powder during plasma shots to explore its effects. As part of our upcoming ST40 LEAPS upgrade – in partnership with the U.S. Department of Energy and Department for Energy Security and Net Zero – we’ll go further, coating plasma-facing components with solid lithium using the ‘lithium evaporation’ technique. We’ll be experimentally testing several mechanisms. One key focus is how lithium absorbs hydrogen isotopes and reduces their recycling back into the plasma, lowering the density at the plasma edge, leading to a more stable edge pressure gradient. We’re starting to understand more about lithium’s effect on plasma performance, and early results show lithium isn't getting into the plasma core, which is good news for avoiding diluting the fusion fuel in future plants. The physics is complex, and we’re still learning. But each step brings us closer to fusion energy. By incorporating lithium into ST40, the world’s highest field spherical tokamak, we’re advancing our understanding of this critical enabling technology. #Fusion #FusionEnergy #Innovation #Limitless #EnergyTransition

Tokamak Energy

66,652 次观看 • 1 年前

The Lancia Stratos Zero, an iconic concept car, made a stunning appearance on the streets of Milan in 1970, captivating onlookers with its futuristic design. Unveiled at the 1970 Turin Motor Show, this striking vehicle was unlike anything the world had seen before, featuring sharp angles and an ultra-low profile that looked more like a spacecraft than a traditional car. Its wedge-shaped body and bold lines set it apart from the conventional designs of the time, signaling a new era in automotive innovation. When the Stratos Zero was driven through Milan, it became an instant symbol of cutting-edge technology and automotive artistry. The car's innovative design was not just about aesthetics; it also showcased the capabilities of automotive engineering at the time. The Stratos Zero was powered by a V4 engine and built with lightweight materials, contributing to its impressive performance. Its low, flat stance and aggressive angles were a testament to the visionary design of Marcello Gandini, the legendary Italian designer behind the car. With its unique door design that opened upwards, the Stratos Zero demonstrated the fusion of style, performance, and futuristic thinking, all of which made it a standout in the automotive world. As it cruised through the busy streets of Milan, the Lancia Stratos Zero was more than just a car—it was a symbol of ambition and progress. The attention it drew from passersby reflected the excitement and awe that accompanied the unveiling of such a revolutionary concept. Although the Stratos Zero remained a concept car, its influence on automotive design was far-reaching, and it paved the way for the eventual creation of the production Lancia Stratos, which became a racing legend. The 1970 Milan sighting of the Stratos Zero remains one of the most memorable moments in automotive history, showcasing the limitless possibilities of design and technology. 🎥© Sarahh #archaeohistories

Archaeo - Histories

53,053 次观看 • 1 个月前

If an AI can control 1,000 robots to perform 1 million skills in 1 billion different simulations, then it may "just work" in our real world, which is simply another point in the vast space of possible realities. This is the fundamental principle behind why simulation works so effectively for robotics. Real-world teleoperation data scales linearly with human time (< 24 hrs/robot/day). Sim data scales exponentially with compute. There are 3 big trends for simulators in the near future: 1. Massive parallelization on large clusters. Physics equations are "just" matrix math at their core. I hear GPUs are good at matrix math 🔥. One can run 100K copies of simulation on a single GPU. To put this number in perspective: 1 hour of wallclock compute time gives a robot 10 years (!!) of training experience. That's how Neo was able to learn martial arts in a blink of an eye in the Matrix Dojo. 2. Generative graphics pipeline. Traditionally, simulators require a huge amount of manual effort from artists: 3D assets, textures, scene layouts, etc. But every component in the workflow can be automated: text-to-image, text-to-3D mesh, and LLMs that write Universal Scene Description (USD) files as a coding exercise. RoboCasa is one example of a prior work. 3. End2end neural net that acts as simulator itself. This is still bluesky research and quite far from replacing a graphics pipeline, but we are seeing some exciting signs-of-life based on video gen models: Sora, Veo2, CogVideoX, Hunyuan (text-to-video); and action-driven world models: GameNGen, Oasis, Genie-2, etc. Genesis does great on (1) for certain tasks, shows good promises on (2), and could become a data generation tool for reaching (3). Its sim2real capabilities for locomotion are good, but there's still a long way to go for contact-rich, dexterous manipulation. It shows a bold vision and is on the right path to providing a virtual cradle for embodied AI. It is open-source and puts a streamlined user journey at the front and center. I had the privilege to know Zhou Xian and play a small part in his project since a year ago. Xian has been crunching code non-stop on Genesis with a very small group of core devs. He often replied to my messages at 3 am. Zhenjia Xu from our GEAR team helped with sim2real experiments in his spare time. Genesis is truly a grassroot effort with an intense focus on quality engineering. Nothing gives me more joy than seeing the simulation ecosystem bloom. Robotics should be a moonshot initiative owned by all of humanity. Congratulations.

Jim Fan

157,343 次观看 • 1 年前