Connect with us

Science

Apple adding its own co-processors to three Macs in 2018, Bloomberg reports

Published

on


Apple’s own T2 co-processor inside the iMac Pro desktop.

A new Bloomberg article is reporting that Apple plans to expand the number of Macs using its own co-processor chips this year, a move that could foretell a future where Intel is no longer inside Apple’s computers.

According to the report, Apple is looking to add one of its custom co-processing chips to a pair of MacBook laptops and a Mac desktop to be released later this year. They would join the existing MacBook Pro with Touch Bar and iMac Pro as being Mac systems with Apple-made co-processors. Of course, iPhones and iPads have used the company’s own chips for several years, and the Apple Watch has since its launch in 2015.

For now, Intel remains the provider of the main CPU for Macs, though Bloomberg claims that the recent security woes that have dogged that company’s chips may have provided Apple more ammunition to chart its own course for future Mac processors. Another report today claims Apple is slowing its roll-out of new iOS features in 2018 as it deals with reliability issues, so security — something the company has long touted compared to systems without its “walled garden” approach — is receiving greater attention in Cupertino.

Apple avoids some of the cost issues that other companies have had in the past building their own chips by outsourcing the manufacturing. Designing chips in-house also allows the company to tailor them to new features it’s developing. Abandoning its on-again off-again relationship with Intel would starve the chip maker of its fifth-largest client, according to Bloomberg.

Despite the increasing resources Apple is devoting to chip research and creation, it’s only built computer chips that complement Intel’s primary processor — the T1 co-processor handles the Touch Bar, while the T2 edition offloads some security and power management duties on the iMac Pro. It remains to be seen what a potential T3 co-processor will control, and there’s quite a leap from a chip working on a few tasks to ones that have to power the entire system, potentially including graphics processing to boot.

If Apple decides in the future to produce its own CPUs for Macs, it could drive a great debate among its fanboys. Would Macs (and their users) be better served by Intel, whose high-performance chips have been undermined by security holes, or by Apple, whose chips would be untested in laptops and desktops but could maximize the potential of the Mac OS? It seems unlikely we’ll find out in 2018, but another year of behind-the-scenes work by Apple could make for a very interesting 2019.

Source link



Source link

Continue Reading
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Science

The art and science of boarding an airplane in a pandemic

Published

on

Enlarge / During the pandemic, several airlines have switched boarding procedures to create more distance between passengers.

Nicholas Economou | NurPhoto | Getty Images

Jason Steffen studies planets in other solar systems. His most famous work—OK, second-most famous work—was with NASA’s Kepler Mission, a survey of planetary systems. But you’re more likely to have heard of Steffen, a professor at the University of Nevada at Las Vegas, in a very different context: as a student of the airplane boarding process. Years ago, after waiting in yet another line on a jam-packed jetway, the physicist thought to himself, “There has to be a better way than this.”

Airlines are invested in boarding times—and to a lesser extent, offboarding—because time equals money. Flying people around the world is a low-margin business, and the faster you can get a flight loaded, into the air, and then emptied on the ground, the faster you can get the next round of paying customers into the air.

In 2008, Steffen published a paper detailing his way, which has become known as the Steffen method. Forget the point-counters in business class. Forget the smug airline-branded credit card wielders with priority boarding. Forget even the first -class passengers—the complimentary champagne can wait. The fastest way to board an airplane, he concluded, is to allow many people to do many boarding tasks at once. Start with the person in the window seat in the last row on the right side. The person in the third-to-last window seat goes next, allowing time to swing items into the overhead bin. Then the person in the fifth-to-last window seat, and so on until the right side fills up. Then the left side. Then the same pattern for middle seats. Then the aisle. Yeah, a little complicated.

It’s been over a decade, and maybe it won’t surprise you to learn that no airlines have fully gone for the Steffen method. In fact, there’s a subgenre of global researchers—engineers, physicists, computer scientists, cyberneticists, and economists—who search for more optimal ways to cram crowds onto flying metal tubes. They’ve devised at least 20 methods to get people onto planes. But for many reasons—airline finances, airport infrastructure, technological shortcomings—their research has mostly fallen on deaf ears. In 2013, the Dutch airline KLM experimented with a modified Steffen method boarding process, but the company later said the trial had no “tangible additional benefit.”

Now a global pandemic has done the seemingly impossible: shaken up airplane boarding procedures. Along with requiring masks, providing hand sanitizer, and, in some cases, banning passengers from middle seats, many airlines have created boarding and deboarding processes that try to avoid packing flyers too closely together.

Delta, which previously boarded passengers according to ticket classes and mileage club memberships, is loading the airplane back to front, so that flyers don’t pass by others as they make their way to their seats. After preboarding families and passengers that need extra time, United is going back-to-front too. Even Southwest, famous for letting passengers choose their seats, is only letting 10 passengers on at a time, instead of the usual 30. The process is certainly slower, but Southwest, and other airlines, have far fewer passengers these days.

Researchers pushing for smarter approaches to getting on airplanes are hoping for more change. Big changes in aviation tend to only happen when people die or get hurt, says Michael Schultz, who studies air transportation at Technische Universität Dresden. The airlines “try to learn what’s going wrong, and then they try to improve,” he says.

With that in mind, Schultz has been working since last spring with colleagues around the world to identify and simulate the fastest—and safest—way to get people onto and off airplanes right now. He hopes the pandemic pushes airlines to update their technology, so that they’re able to board passengers dynamically, pushing an alert to a passenger’s smartphone when it is their turn to board. He thinks a connected aircraft cabin filled with sensors could help crews direct flyers through often-hectic deboardings too.

“Airlines are dealing with a very precious balancing act,” says Martin Rottler, an aviation veteran who now runs his own consultancy. “They need to balance efficiency with customer satisfaction, and now they need to add on safety.”

Using simulations, researchers devised a boarding method that balances airline efficiency with passenger safety during a pandemic.

Another team of researchers, divided between Bucharest, Romania and Potsdam, New York, think they’ve hacked the perfect mix. They call it the “WilMA back-to-front offset-2,” and it boards back to front, by rows, with the window seats first. The method might occasionally see a passenger on her way back briefly pass someone already sitting at the window. But it threads the needle, the researchers say, between safety and efficiency.

In fact, the boarding process is a little like what lots of airlines are doing now. “They’re just not quite fine-tuning the method” to make it even easier, says John Milne, an engineering management professor at Clarkson University who worked on the research. It’s high time, in other words, for the academic plane-boarding obsessives, not the business people, to be in charge for a change.

This story originally appeared on wired.com.

Continue Reading

Science

What’s the technology behind a five-minute charge battery?

Published

on

Building a better battery requires dealing with problems in materials science, chemistry, and manufacturing. We do regular coverage of work going on in the former two categories, but we get a fair number of complaints about our inability to handle the third: figuring out how companies manage to take solutions to the science and convert them into usable products. So, it was exciting to see that a company called StoreDot that was claiming the development of a battery that would allow five-minute charging of electric vehicles was apparently willing to talk to the press.

Unfortunately, the response to our inquiries fell a bit short of our hopes. “Thank you for your interest,” was the reply, “we are still in pure R&D mode and cannot share any information or answer any questions at the moment.” Apparently, the company gave The Guardian an exclusive and wasn’t talking to anyone else.

Undeterred, we’ve since pulled every bit of information we could find from StoreDot’s site to figure out roughly what they were doing, and we went backwards from there to look for research we’ve covered previously that could be related. What follows is an attempt to piece together a picture of the technology and the challenges a company has to tackle to take research concepts and make products out of them.

The need for speed

To an extent, StoreDot is using ideas that have been floating around research labs and startups for years, but it’s taking a bit of a risk by using these ideas in a way that’s different from their apparent promise. The bet that StoreDot is making is that it’s not the absolute charge range of an electric vehicle that matters; it’s how quickly you can extend that range. So, while it’s leveraging research on technologies that allow greater capacity in lithium ion batteries, it’s turning around and sacrificing some of that capacity in order to make charging faster.

Put differently, the bet is that people would rather add 300km to the range of their car in five minutes than have a car with a 600km range that takes an hour to fully charge.

What are the implications of that bet at the hardware level? They’re mostly dictated by heat management. As anyone who’s plugged in a low-charge laptop while it’s sitting on their lap knows, charging a battery produces a lot of heat. Charging it faster produces even more. To deal with this heat, StoreDot is essentially producing a diffuse battery with lots of space in between individual cells, as you can see at the four minute mark of this video (embedded below). The cells have significant gaps between them, and the battery housing has holes that allow airflow between them. It’s charged in a stand with fans that force air through the battery to keep the heat under control.

Anybody could do that with existing battery technology, but there’s a very obvious cost: a much lower energy density, meaning a battery has to be much larger to hold the same amount of charge. StoreDot is compensating by working on technology that allows a much higher charge density, which offsets the lower density of materials. In the end, the battery should hold similar amounts of charge per volume as existing batteries, despite having less battery material present.

Continue Reading

Science

What happens to the brain on sudden impact? Egg yolks could hold the answer

Published

on

A rotational deceleration experiment with egg yolk, using an egg scrambler and measuring the soft matter deformation, to find possible answers about concussions.

A growing number of professional football players have been diagnosed with a neurodegenerative disease called chronic traumatic encephalopathy (CTE), likely the result of suffering repeated concussions or similar repetitive brain trauma over the course of their careers. It’s also common in other high-contact sports like boxing, Muay Thai, kickboxing, and ice hockey. We might find clues about the underlying physics by studying the deformation of egg yolks, according to a new paper published in The Physics of Fluids. This in turn could one day lead to better prevention of such trauma.

Egg yolk submerged in liquid egg white encased in a hard shell is an example of what physicists call “soft matter in a liquid environment.” Other examples include the red blood cells that flow through our circulatory systems and our brains, surrounded by cerebrospinal fluid (CBR) inside a hard skull.  How much a type of soft matter deforms in response to external impacts is a key feature, according to Villanova University physicist Qianhong Wu and his co-authors on this latest study. They point to red blood cells as an example. It’s the ability of red blood cells to change shape under stress (“erythrocyte deformability”) that lets them squeeze through tiny capillaries, for instance, and also triggers the spleen to remove red blood cells whose size, shape, and overall deformability have been too greatly altered.

In the case of traumatic brain injury, it is linked to how much the brain deforms in response to impact. The precise cause of CTE is still a matter of ongoing research, but the prevailing theory holds that repetitive brain trauma can damage blood vessels in the brain, causing inflammation and the growth of clumps of a protein called Tau. Eventually those clumps spread throughout the brain killing off brain cells. Those suffering from CTE often experience memory loss, depression, and in severe cases, dementia, among other symptoms.

Prior studies have shown that deformation of soft matter in a liquid environment occurs in response to sudden changes in the fluid field, such as shear flow or a sudden change of the flow pathway. Wu et al. were interested in the specific case of soft matter in a liquid environment that is also enclosed in a rigid container—like the yolk of an egg, surrounded by liquid egg white, all encased in a shell. They wondered if it was possible to break the yolk without breaking the shell, since it’s the case with most concussions that the brain can be damaged without cracking the skull.

To answer that question, Wu et al. set up a simple preliminary experiment with a Golden Goose Egg Scrambler, a novel kitchen device that enables users to scramble an egg right in the shell. Wu’s team applied rotational forces to scramble the egg and were intrigued by how the egg yolk deformed and broke while the shell remained intact. That inspired them to conduct additional experiments to glean insight into the fundamental flow physics behind the effect.

They purchased fresh eggs from a local grocery store, removed the yolks and egg whites, and then placed them in a transparent rigid container, the better to monitor the deformation by recording the entire process with high-speed cameras. They built two separate apparatus. One administered so-called “translational impact”—i.e., striking the container directly—via a small hammer falling from a vertical guide rail (see Fig 1A in gallery), with a spring at the bottom enabling the container to move vertically. They used an accelerometer to measure the container’s acceleration.

For the second setup (see Fig 1B in gallery), they connected the container to an electric motor to study two types of rotational impact: accelerating rotational impact and decelerating rotational impact (i.e., when the outer contained is speeding up or slowing down as it rotates). They also peeled off the membranes surrounding the fresh yolks and suspended them in petri dishes filled with water, the better to study how those membranes, too, respond to stress.

Wu et al. were somewhat surprised to find that, in the case of translational impact, there was almost no deformation of the yolk. Instead, the entire container (and its contents) moved as a single rigid body. In the case of accelerating rotational impact, the team found that the yolk would start out in a spherical shape and then begin to stretch horizontally to form an ellipsoid. The yolk could maintain a stable ellipsoid shape for several minutes if the angular velocity was kept constant.

The most intriguing results occurred in the case of decelerating rotational impact. Here, the yolk began deforming significantly almost immediately, expanding horizontally and increasing its radius at the center—sufficient deformation to severely damage the yolk under sustained stress.

“We suspect that rotational, especially decelerational rotational, impact is more harmful to brain matter.”

To make sure this wasn’t primarily an effect of the yolk as a biomaterial, Wu et al. conducted the same experiment with synthesized soft capsules submerged in a calcium lactate solution, enclosed by a thin membrane of calcium alginate. They got similar results, confirming that “the dominant mechanism leading to the deformation of soft matter in a liquid environment is a result of mechanical forces instead of biological responses,” they wrote.

Based on this, “We suspect that rotational, especially decelerational rotational, impact is more harmful to brain matter,” said Wu, and that centrifugal force likely plays a critical role. “The large deformation of brain matter during this process induces the stretch of neurons and causes the damage.” This could explain why a boxer can get knocked out by a sharp blow to the chin. “Considering the chin is the farthest point from the neck, hitting on the chin could cause the highest rotational acceleration/deceleration of the head,” the authors concluded.

“Critical thinking, along with simple experiments within the kitchen, led to a series of systematic studies to examine the mechanisms that cause egg yolk deformation,” Wu said of the implications of their findings. “We hope to apply the lessons learned from it to the study of brain biomechanics as well as other physical processes that involve soft capsules in a liquid environment, such as red blood cells.”

DOI: Physics of Fluids, 2021. 10.1063/5.0035314  (About DOIs).

Listing image by Ji Lang/Qianhong Wu

Continue Reading

Trending