Computers & Linux News

I Took a Magic VR Meow Wolf Journey, and You Can Too - CNET

CNET News - Fri, 2023-12-08 08:00
Walkabout Mini Golf's Meow Wolf collaboration is here, and its creators discuss how the future of immersive entertainment is already underway.

What's a Carbon Footprint and Does Yours Matter? - CNET

CNET News - Fri, 2023-12-08 08:00
It's a tool that can help you reduce your impact on the planet, but there are much more effective ways to help tackle climate change.

The Big Vision Behind These iOS, WatchOS Updates video - CNET

CNET News - Fri, 2023-12-08 08:00
Some of this year's updates to the iPhone and Apple Watch may be shifting us into a Vision Pro mindset and a future working in augmented reality. CNET's Bridget Carey takes us through some possibilities.

Best Home Exercise Equipment for 2023 - CNET

CNET News - Fri, 2023-12-08 08:00
Get fit at home (and have fun doing it) with these essential pieces of exercise equipment, from weights to mats, along with recommendations on where to buy.

Best Internet Providers in Hialeah, Florida - CNET

CNET News - Fri, 2023-12-08 08:00
Whether you're looking for high-speed service or a more affordable plan, CNET helps you compare your broadband options in the City of Progress.

Fiat 500e EVs Will Begin Battery Swap Testing In 2024

SlashDot - Fri, 2023-12-08 08:00
An anonymous reader quotes a report from The Verge: Stellantis struck a deal with California-based EV battery swapping company Ample to power a fleet of shared Fiat 500e vehicles in Spain. But the company says the deal could eventually expand to include personally owned EVs in Europe and the US as well. By becoming one of the first Western automakers to embrace battery swapping technology, Stellantis is betting that EV charging infrastructure in Europe and the US will remain a barrier to adoption in the near future, necessitating other solutions. Battery swapping could theoretically help EV owners power up and get moving without having to wait for long stretches at a charging station. Stellantis will work with Ample to launch a battery swapping system for a fleet of Fiat 500e vehicles as part of a car-sharing service through its Free2move subsidiary. The service will first appear in Madrid in 2024, where the Fiat 500e is already available. (The tiny EV won't come to North America until next year.) Ample has four stations already in operation in the city and plans to build an additional nine stations in the months to come. Stellantis will need to install modular batteries in the Fiat 500e in order to be compatible with Ample's swapping system. The process works by driving the vehicle into a station, where it gets raised slightly. Ample's robot arms remove the spent battery from underneath the vehicle, replace it with a fully charged one, and then lower the vehicle. The company says the whole process can take as little as five minutes. "Our system knows how many batteries are in the Fiat 500e, knows how to extract each one of those modules, and put them back in the same arrangement," Khaled Hassounah, CEO of Ample, said in a briefing with reporters. Starting with a small fleet of shared vehicles in one city will help Stellantis see how well Ample's system works and whether it can be scaled to new markets and to include privately owned vehicles. If the company does decide to expand its partnership with Ample, the Fiat 500e will likely be the first vehicle to support the technology, said Ricardo Stamatti, senior VP for charging and energy at Stellantis. Customers who buy cars that are compatible with Ample's swapping system would then just subscribe to a battery, opening up a possible new line of revenue for Stellantis. "We believe that this is actually an infrastructure play that can and will scale," Stamatti added.

Read more of this story at Slashdot.

Block Out the Noise With $10 Off Curvd Earplugs - CNET

CNET News - Fri, 2023-12-08 07:47
Whether you're blocking out a partner's snoring or a worksite, these earplugs are a bargain today.

Aura Smart Picture Frames Make Perfect Gifts, and They're Up to $50 Off - CNET

CNET News - Fri, 2023-12-08 07:42
Remember good times with friends and family with these smart photo frames from $149.

Mortgage Refinance Rates on Dec. 8, 2023: Rates Slide - CNET

CNET News - Fri, 2023-12-08 06:47
Multiple important refinance rates fell this week. If you're hoping to refinance your home, keep an eye on where rates are headed.

Here Are Mortgage Rates for Dec. 8, 2023: Rates Ease - CNET

CNET News - Fri, 2023-12-08 06:47
This week, some important mortgage rates declined. While interest rates remain elevated, it's more expensive to buy a house.

Nikon Makes Special Firmware For NASA To Block Galactic Cosmic Rays In Photos

SlashDot - Fri, 2023-12-08 05:00
In an exclusive interview with PetaPixel, astronaut Don Pettit reveals the changes that Nikon makes to its firmware especially for NASA. From the report: Galactic cosmic rays are high-energy particles that originate from outside the solar system that likely come from explosive events such as a supernova. They are bad news for cameras in space -- damaging the sensor and spoiling photos -- so Nikon made special firmware for NASA to limit the harm. Pettit tells PetaPixel that Nikon changed the in-camera noise reduction settings to battle the cosmic rays -- noise is unwanted texture and blur on photos. Normal cameras have in-camera noise reduction for exposures equal to or longer than one second. This is because camera manufacturers don't think photographers need noise reduction for shorter exposures because there's no noise to reduce. But in space, that's not true. "Our cameras in space get sensor damage from galactic cosmic rays and after about six months we replace all the cameras but you still have cameras with significant cosmic ray damage," explains Pettit. "It shows up at fast shutter speeds, not just the slow ones. So we got Nikon to change the algorithm so that it can do in-camera noise reduction at shutter speeds of up to 500th of a second." Pettit says Nikon's in-camera noise reduction "does wonders" for getting rid of the cosmic ray damage and that "trying to get rid of it after the fact is really difficult." That's not the only special firmware feature that Nikon makes for NASA; photographers who shoot enough photos know that the file naming system resets itself eventually which is no good for the space agency's astronauts. "The file naming system on a standard digital system will repeat every so often and we can't have two pictures with the same number," explains Pettit. "We'll take half a million pictures with the crew on orbit and so Nikon has changed the way the RAW files are numbered so that there will be no two with the same file number." The report notes that NASA started using Nikon film cameras in 1971, shortly after the Apollo era; "in part because Nikon is so good at making custom modifications that help the astronauts." Previously, the agency used boxy, black Hasselblad cameras.

Read more of this story at Slashdot.

Best Internet Providers in Springfield, Missouri - CNET

CNET News - Fri, 2023-12-08 02:10
Springfield residents don’t have many options available, but AT&T Fiber is an easy choice if you can get it.

Light Can Be Reflected Not Only In Space But Also In Time

SlashDot - Fri, 2023-12-08 02:00
Anna Demming reports via Scientific American: [A]lthough so far there's no way to unscramble an egg, in certain carefully controlled scenarios within relatively simple systems, researchers have managed to turn back time. The trick is to create a certain kind of reflection. First, imagine a regular spatial reflection, like one you see in a silver-backed glass mirror. Here reflection occurs because for a ray of light, silver is a very different transmission medium than air; the sudden change in optical properties causes the light to bounce back, like a Ping-Pong ball hitting a wall. Now imagine that instead of changing at particular points in space, the optical properties all along the ray's path change sharply at a specific moment in time. Rather than recoiling in space, the light would recoil in time, precisely retracing its tracks, like the Ping-Pong ball returning to the player who last hit it. This is a "time reflection." Time reflections have fascinated theorists for decades but have proved devilishly tricky to pull off in practice because rapidly and sufficiently changing a material's optical properties is no small task. Now, however, researchers at the City University of New York have demonstrated a breakthrough: the creation of light-based time reflections. To do so, physicist Andrea Alu and his colleagues devised a "metamaterial" with adjustable optical properties that they could tweak within fractions of a nanosecond to halve or double how quickly light passes through. Metamaterials have properties determined by their structures; many are composed of arrays of microscopic rods or rings that can be tuned to interact with and manipulate light in ways that no natural material can. Bringing their power to bear on time reflections, Alu says, revealed some surprises. "Now we are realizing that [time reflections] can be much richer than we thought because of the way that we implement them," he adds. [...] The device Alu and his collaborators developed is essentially a waveguide that channels microwave-frequency light. A densely spaced array of switches along the waveguide connects it to capacitor circuits, which can dynamically add or remove material for the light to encounter. This can radically shift the waveguide's effective properties, such as how easily it allows light to pass through. "We are not changing the material; we are adding or subtracting material," Alu says. "That is why the process can be so fast." Time reflections come with a range of counterintuitive effects that have been theoretically predicted but never demonstrated with light. For instance, what is at the beginning of the original signal will be at the end of the reflected signal -- a situation akin to looking at yourself in a mirror and seeing the back of your head. In addition, whereas a standard reflection alters how light traverses space, a time reflection alters light's temporal components -- that is, its frequencies. As a result, in a time-reflected view, the back of your head is also a different color. Alu and his colleagues observed both of these effects in the team's device. Together they hold promise for fueling further advances in signal processing and communications -- two domains that are vital for the function of, say, your smartphone, which relies on effects such as shifting frequencies. Just a few months after developing the device, Alu and his colleagues observed more surprising behavior when they tried creating a time reflection in that waveguide while shooting two beams of light at each other inside it. Normally colliding beams of light behave as waves, producing interference patterns where their overlapping peaks and troughs add up or cancel out like ripples on water (in "constructive" or "destructive" interference, respectively). But light can, in fact, act as a pointlike projectile, a photon, as well as a wavelike oscillating field -- that is, it has "wave-particle duality." Generally a particular scenario will distinctly elicit just one behavior or the other, however. For instance, colliding beams of light don't bounce off each other like billiard balls! But according to Alu and his team's experiments, when a time reflection occurs, it seems that they do. The researchers achieved this curious effect by controlling whether the colliding waves were interfering constructively or destructively -- whether they were adding or subtracting from each other -- when the time reflection occurred. By controlling the specific instant when the time reflection took place, the scientists demonstrated that the two waves bounce off each other with the same wave amplitudes that they started with, like colliding billiard balls. Alternatively they could end up with less energy, like recoiling spongy balls, or even gain energy, as would be the case for balls at either end of a stretched spring. "We can make these interactions energy-conserving, energy-supplying or energy-suppressing," Alu says, highlighting how time reflections could provide a new control knob for applications that involve energy conversion and pulse shaping, in which the shape of a wave is changed to optimize a pulse's signal.

Read more of this story at Slashdot.

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