Category: computing – Page 463
Doorbells are among those everyday objects that started out simple but picked up an immense amount of complexity over the years. What began as a mechanism to bang two pieces of metal together evolved into all kinds of wired and wireless electric bells, finally culminating in today’s smart doorbells that beam a live video feed to their owners even if they’re half a world away.
But sometimes, less is more. [Low tech obsession] built a doorbell out of spare components that doesn’t require Internet connectivity or even a power supply. But it’s not a purely mechanical device either: the visitor turns a knob mounted on a stepper motor, generating pulses of alternating current. These pulses are then fed into the voice coil of an old hard drive, causing its arm to vibrate and strike a bell, mounted where the platters used to be.
Besides being a great piece of minimalistic design, the doorbell is also a neat demonstration of Faraday’s law of induction. The stepper motor is apparently robust enough to withstand vandalism, although we can imagine that the doorbell’s odd shape might confuse some well-meaning visitors too. If you’re into unusual doorbells, you might want to check out this one made from an old wall phone, as well as this electromechanical contraption.
TAMPA, Fla. (WFLA) — Following multiple news organizations covering allegations of animal abuse at Neuralink, Elon Musk’s brain chip company, the tech developer issued a statement on its animal welfare policies.
Earlier this month, the Physicians Committee for Responsible Medicine announced lawsuits against the University of California, Davis and Neuralink over its treatment of the macaque monkeys used to test the experimental brain implants developed by Musk’s company.
To show how bad the chip shortage is, Nvidia just spent about $10 billion in bribes (prepayments) to get TSMC to build some chips for it!
Why it matters: Securing enough manufacturing capacity is going to be critical to the success of Nvidia’s RTX 4,000 GPUs, which are expected to land as soon as this summer. The RTX 3,000 series were regarded by gamers as paper launches, but the company is said to have paid through the nose so that wouldn’t be the case for its upcoming GPUs.
Back in November 2021, the rumor mill was abuzz with hints that Nvidia was planning to use TSMC’s 5nm process node for its upcoming GeForce RTX 4,000 series (Ada Lovelace) GPUs. These are widely expected to be significantly faster and more power-hungry when compared to the current Ampere lineup, but a much bigger issue for the Jensen Huang-powered company is securing enough manufacturing capacity.
According to a report from Hardware Times, Nvidia is prepared to pay dearly for the ability to meet growing demand for increasingly powerful graphics cards. Specifically, it may be offering up to $10 billion to TSMC for a significant chunk of its 5nm manufacturing capacity. Other companies tapping TSMC’s N5 process node are Bitmain, AMD, and Apple.
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A year into his tenure as Intel CEO, Pat Gelsinger says his effort to reclaim chip technology leadership is on track.
Some say that Moore’s Regulation, which tracks the exponential progress electronics during the last six a long time has stalled, and technological stagnation threatens. Mark Rosker, director of DARPA’s Microsystems Know-how Workplace (MTO), sees issues very in another way. In a new interview with Samuele Lilliu, he explains how the expansion described by Moore’s Regulation has been sustained by waves of innovation from DARPA and the way the following stage, what he calls the Fourth Wave, might be carried ahead by applied sciences his workplace is now creating.
The best model of Moore’s Regulation says that the variety of transistors on a silicon chip roughly doubles each two years. This was an commentary made by Gordon Moore – who later co-founded Intel – in 1965, and it proved to be remarkably correct. Yearly since then, an increasing number of highly effective computer systems and, later, laptops and smartphones have appeared in the marketplace. Low-cost chips have now grow to be important for vehicles, televisions, cameras and different units, which beforehand functioned with out electronics. They’re important throughout the financial system.
Describing the progress as a “Regulation” could also be deceptive. Moore’s Regulation is an outline of the development in semiconductor manufacturing, pushed by advances in science and know-how which requires fixed innovation to maintain going, not a pure course of.
Chip crisis? What chip crisis?
AMD has finally lifted the lid on its Ryzen 6,000 series mobile chips and the core 6nm design is far more than just an optical shrink. The resulting “massive increase in yield” means far more CPUs spilling out of TSMCs foundry, which can only help an industry in a chip supply crisis.
These Zen 3+ CPUs are going to be making their way to gaming laptops soon, and promise great things for notebooks this year. Intel’s Alder Lake mobile CPUs are also going to be dropping at the same time, plus we’ve got Nvidia’s mobile 3,070 Ti and 3,080 Ti to look forward to as well. If you’ve been putting off getting a new mobile gaming machine, then your patience should pay off nicely.
Researchers have created a device that enables them to electronically steer and focus a beam of terahertz electromagnetic energy with extreme precision. This opens the door to high-resolution, real-time imaging devices that are hundredths the size of other radar systems and more robust than other optical systems.
Terahertz waves, located on the electromagnetic spectrum between microwaves and infrared light, exist in a “no man’s land” where neither classic electronics nor optical devices can effectively manipulate their energy. But these high-frequency radio waves have many unique properties, like the ability to pass through certain solid materials without the health effects of X-rays. They may also enable higher-speed communications, or vision systems that can see through foggy or dusty environments.
The Terahertz Integrated Electronics Group at MIT, led by Associate Professor Ruonan Han, seeks to bridge this so-called terahertz gap. These researchers have now demonstrated the most precise, electronically steerable, terahertz antenna array, which contains the largest number of antennas. The antenna array, called a “reflectarray,” operates like a controllable mirror with its direction of reflection guided by a computer.
We construct quantum algorithms to compute physical observables of nonlinear PDEs with M initial data. Based on an exact mapping between nonlinear and linear PDEs using the level set method, these new quantum algorithms for nonlinear Hamilton-Jacobi and scalar hyperbolic PDEs can be performed with a computational cost that is independent of M, for arbitrary nonlinearity. Depending on the details of the initial data, it can also display up to exponential advantage in both the dimension of the PDE and the error in computing its observables. For general nonlinear PDEs, quantum advantage with respect to M is possible in the large M limit.