You Can Talk to Your Friends without Internet Through New Bluetooth-Powered Messenger Bitchat.
Jack Dorsey is testing his invention.
Category: internet
Pretrained jet foundation model successfully utilized for tau reconstruction
Simulating data in particle physics is expensive and not perfectly accurate. To get around this, researchers are now exploring the use of foundation models—large AI models trained in a general, task-agnostic way on large amounts of data.
Just like how language models can be pretrained on the full dataset of internet text before being fine-tuned for specific tasks, these models can learn from large datasets of particle jets, even without labels.
After the pretraining, they can be fine-tuned to solve specific problems using much less data than traditional approaches.
Jack Dorsey launches a WhatsApp messaging rival built on Bluetooth
CEO Jack Dorsey spent the weekend building Bitchat, a new decentralized, peer-to-peer messaging app that works entirely over Bluetooth mesh networks, with no internet, central servers, phone numbers or emails required.
The Twitter co-founder announced Sunday that the beta version is live on TestFlight, with a full white paper available on GitHub.
Block CEO Jack Dorsey has launched Bitchat, a new peer-to-peer messaging app that works entirely over Bluetooth mesh networks.
New imaging technique reconstructs the shapes of hidden objects
A new imaging technique developed by MIT researchers could enable quality-control robots in a warehouse to peer through a cardboard shipping box and see that the handle of a mug buried under packing peanuts is broken.
Their approach leverages millimeter wave (mmWave) signals, the same type of signals used in Wi-Fi, to create accurate 3D reconstructions of objects that are blocked from view.
The waves can travel through common obstacles like plastic containers or interior walls, and reflect off hidden objects. The system, called mmNorm, collects those reflections and feeds them into an algorithm that estimates the shape of the object’s surface.
Quantum Entanglement: The “Spooky” Glue Uniting Qubits and Beyond
From enabling quantum supercomputers to securing communications and teleporting quantum states, entanglement is the thread weaving through all of quantum technology. What once struck Einstein as a paradox is today routinely observed and harnessed in labs – the “spooky action” has become a practical tool. We have learned that entanglement is not some esoteric fringe effect; it’s a concrete physical resource, much like energy or information, that can be exploited to do tasks that are otherwise impossible. Its special correlations allow quantum computers to perform massively parallel computations in a single wavefunction, allow cryptographers to detect eavesdroppers with absolute certainty, and allow quantum states to be transmitted without moving a physical carrier.
Yet, there is still much to master. Entangling a handful of qubits is easy; doing so with thousands or millions – while keeping them error-corrected – remains a grand challenge. As we push the number of entangled particles higher, we are essentially scaling up new forms of matter (entangled states) that have no counterpart in classical physics. In 2022, a 12-qubit entangled state might be a small quantum circuit; by 2035, we could be operating machines where 1,000 qubits are all entangled in complex ways, delivering computational feats far beyond today’s reach. On the communications front, nascent quantum networks are entangling nodes over city-scale distances, working toward a future quantum internet that could interconnect quantum computers or enable clock synchronization and sensing with unprecedented precision. Each improvement in generating high-quality entanglement over distance inches us closer to unhackable global communication links.
Entanglement also raises philosophical questions about the nature of reality – it blurs the boundary between “separate” objects and challenges our intuitions of locality. But from an engineer’s perspective, entanglement is also just another phenomenon to be tamed and utilized. The narrative of quantum technology is one of turning quantum quirks into quantum capabilities. Where classical engineers use wires and signals, quantum engineers use entanglement and superposition. It’s telling that entanglement is often called the “essence” or “cornerstone” of quantum mechanics – crack it, and you unlock a whole new paradigm of information processing.
New laser power converters can transmit power to further, remote destinations
From smart grids to the internet of things, the modern world is increasingly reliant on connectivity between electronic devices. Thanks to University of Ottawa researchers, these devices can now be simultaneously connected and powered with a simple optical fiber over long distances, even in the harshest environments.
This significant step forward in the development of photonic power converters—devices that turn laser light into electrical power —could integrate laser-driven, remote power solutions into existing fiber optic infrastructure. This, in turn, could pave the way for improved connectivity and more reliable communication in remote locations and extreme situations.
“In traditional power over fiber systems, most of the laser light is lost,” explains Professor Karin Hinzer of the University of Ottawa’s SUNLAB, which collaborated with Germany’s Fraunhofer Institute for Solar Energy Systems on the study. “With these new devices, the fiber can be much longer.”
Tesla Responds w/ Huge Hardware Change to Improve Autonomy
Questions to inspire discussion.
🚕 Q: How reliable is Tesla’s robotaxi service based on recent experiences? A: Tesla’s robotaxi service has perfect rides in 9 out of 10 experiences, with one incident of phantom braking due to sun glare.
📱 Q: How do users access and pay for Tesla’s robotaxi service? A: Users access the service through a separate app from the Tesla app, requiring Tesla sign-in and linked credit card information for payment.
Tesla Model Updates and Pricing.
🔋 Q: What changes were made to the refreshed Model S and X? A: The refresh includes new hardware for improved autonomy, new color options, wheel design, and ambient lighting, with a $5,000 price increase and 5–7% range increase.
🛡️ Q: What does Tesla’s new extended warranty plan offer? A: Tesla’s plan extends coverage for 4 years or 100,000 miles at $50–150 per month depending on the model, covering most manufactured parts except the high-voltage battery, tires, and glass.
Affordable laser could be mass-produced for use in self-driving cars and fiber optics
Laser technology is used in many areas, where precise measurements are required and in communication. This means that they are important for everything from self-driving cars to the fiber optic internet and for detecting gases in the air.
Now, a research group has come up with a new type of laser that solves several problems associated with current-day lasers. The group is led by Associate Professor Johann Riemensberger at NTNU’s Department of Electronic Systems.
“Our results can give us a new type of laser that is both fast, relatively cheap, powerful and easy to use,” says Riemensberger.