While the thought of a machine that can squirt out endless ropes of molten glass is a bit frightening, the folks at MIT have just about perfected the process. In a paper published in 3D Printing and Additive Manufacturing, researchers Chikara Inamura, Michael Stern, Daniel Lizardo, Peter Houk and Neri Oxman describe a system for 3D printing glass that offers far more control over the hot material and the final product.
Their system, called G3DP2, “is a new AM platform for molten glass that combines digitally integrated three-zone thermal control system with four-axis motion control system, introducing industrial-scale production capabilities with enhanced production rate and reliability while ensuring product accuracy and repeatability, all previously unattainable for glass.”
The system uses a closed, heated box that holds the melted glass and another thermally controlled box where it prints the object. A moveable plate drops the object lower and lower as it is being printed and the print head moves above it. The system is interesting because it actually produces clear glass structures that can be used for decoration or building. The researchers take special care to control the glass extrusion system to ensure that it cools down and crystallizes without injecting impurities or structural problems.
“In the future, combining the advantages of this AM technology with the multitude of unique material properties of glass such as transparency, strength, and chemical stability, we may start to see new archetypes of multifunctional building blocks,” wrote the creators.
It seems someone took Every Frame a Painting literally: The Very Slow Movie Player is …
Apple will expand its advertising business, according to two people familiar with its plans, just as it brings in new privacy rules for iPhones that are likely to cripple the ads offered by its rivals, including Facebook.
The iPhone maker already sells search ads for its App Store that allow developers to pay for the top result. In searches for “Twitter,” for example, the first result is currently TikTok.
Apple now plans to add a second advertising slot, in the “suggested” apps section in its App Store search page. This new slot will be rolled out by the end of the month, according to one of the people, and will allow advertisers to promote their apps across the whole network rather than in response to specific searches.
Apple declined to comment.
The expansion is the first concrete sign that Apple plans to enhance its own advertising business at the same time as it shakes up the broader $350 billion digital ads industry led by Facebook and Google.
Apple’s forthcoming software update, iOS 14.5, will ban apps and advertisers from collecting data about iPhone users without their explicit consent. Most users are expected to decline to be tracked, dealing a huge blow to how the mobile advertising industry works.
Apple has said the changes will improve the privacy of its users, but some critics have accused the company of hoping to boost its own fledgling advertising business. Mark Zuckerberg, the Facebook chief executive, said, “Apple may say they’re doing this to help people, but the moves clearly track with their competitive interests.”
Apple has long wanted to be a big player in mobile advertising. In 2010, it paid $275 million to acquire Quattro Wireless, a mobile advertising company, after being beaten by Google in the bidding for $750 million AdMob.
The same year, it launched iAd, a multiyear effort to build an advertising business.
At launch, iAd had a minimum contract price of $1 million, but within a year it had cut the requirement by half. Apple tried to maintain creative control over ads and was reticent to share user data with marketers, according to analysts at Bernstein. Two years later, Apple cut the minimum contract to just $50 and the whole effort was shut down in early 2016.
Meanwhile, the market for online advertising has boomed, with annual sales of $378 billion, according to the market research group Insider Intelligence.
Google and Facebook are the two biggest players in the market, but Tim Cook, Apple’s chief executive, has repeatedly attacked their business models as unsustainable because of how they accumulate large troves of data to target their ads.
Bernstein estimated that Apple currently earns around $2 billion a year from search ads in the App Store, with 80 percent margins. Apple also sells ads in its Stocks and News apps.
A second advertising slot in the App Store is likely to appeal to advertisers after the iPhone’s privacy changes reduce the effectiveness of targeted ads. But there is more than money at stake, according to Eric Seufert, a mobile advertising expert.
A decade ago, the App Store played a critical role in how consumers discovered new content. Seufert told the tech site Stratechery earlier this year that Apple used to be “king maker—if you got featured, your company valuation might increase by a hundred million dollars.”
He suggested that Apple now wishes to regain this level of control. “If Apple cripples mobile advertising, then the App Store becomes the primary discovery point for apps again, and Apple decides how people use our iPhones. Apple decides which apps are the most popular,” he said.
Garmin has just launched its latest pair of smartwatches, the Garmin Venu 2 and Venu 2S, aimed at those who feel Apple Watches and typical Android smartwatches just don’t give enough health and fitness data. Garmin has a seemingly bottomless roster of smartwatches, and most cater to those who train rather than just exercise casually.
The Venu 2 and 2S seem suited best for somewhat serious to moderately serious trainers who want data informed by all of the latest wearable sensors (SpO2, GPS, HR). At the same time, it covers its smartwatch bases quite well with a vibrant AMOLED touchscreen, onboard music storage, smartphone notifications for iPhone and Android devices (including texts you can reply to on Android), and 11-day battery life.
Add in rapid recharging, which gives you a day of smartwatch use from a 10-minute charge (or 1 hour of GPS with music playback) and all of this should add up to quick-and-easy, everyday integration into your life and routines. Garmin wants to help this along with a revamped UI aesthetic to match the sharper, more colorful AMOLED display and a series of new aggregated metrics that explain what all the data it’s gathering actually means for your health.
Features like Fitness Age, Body Battery, stress tracking, and sleep scores aren’t new to Garmin watches (though, Fitness Age is new to the Venu series), but tips to improve your fitness age, as well as sleep tracking and the all-new Health Snapshot are. Using your resting heart rate and BMI (or body fat percentage if you own a Garmin Index Smart Scale), the Venu can approximate your “fitness age” and explain how to impact this within the Garmin Connect companion app.
The Health Snapshot feature takes a more all-encompassing survey of your body’s functions via a two-minute session that records heart rate, heart rate variability (the variation in time between heartbeats, commonly looked at as an indicator of cardiovascular health), blood oxygen levels, respiration, and stress to create a health report, also viewable in the Connect app.
There are also two new activities added to the more than 25 sport-specific tracking modes: HIIT workouts and a more advanced strength-training mode. HIIT tracking will include timers for AMRAP (as many reps as possible), EMOM (every minute on the minute, where a certain number of reps are done in a minute’s time, using leftover time as the only interstitial rest), and Tabata (20 seconds on, 10 seconds off, for four minutes).
Advanced strength training can scale your one-rep max (manually logged) to applicable exercises of your choosing, lat pulldowns to upright rows, for instance, ensuring you’re training efficiently. It also keeps track of your personal records (also manually logged) for barbell back squats, barbell bench presses, barbell deadlifts, barbell upright rows, and overhead barbell presses. When you’re done working out, you can view your PRs, as well as the muscle groups you worked, directly on the watch.
These new modes work with the more than 75 workouts provided by Garmin or any custom workouts you’ve created from the 1,400+ exercises in the Garmin Connect app. Many of the exercises have videos and graphics within the app to explain them, and it displays an image of the activity on the watch while you’re performing it.
From our experience with other Garmin watches, the on-watch graphic hasn’t been the most seamless way to view and complete an exercise—it’s much easier to follow along on a screen detached from your body—but having prompts on your wrist to guide you through the workout, rather than teach you the exercise, proved properly useful. Like most of Garmin’s watches, you can also enable Garmin Coach to help you train for a 5K, 10K, or half marathon with tailored, dynamic coaching to keep you on a safe and effective pace for your goals.
All the basics and then some
As far as your usual broad-range activity tracking, you’re well-covered on the Venu 2/2S with GPS, blood oxygen monitor, and a heart rate sensor, as well as an altimeter, compass, and gyroscope for more outdoors-y adventures. Speaking of which, the Venu 2/2S still has access to the company’s Livetrack feature for friends and family to check up on you during hikes, runs, and other outdoor activities, as well as automatic incident detection (and a manual trigger), which can alert emergency contacts with your real-time location.
And, of course, if all’s going to plan on your adventures, you can pair up some headphones and enjoy the motivating or calming effect of up to 650 songs stored on your wrist, as well as playlists saved from Spotify, Amazon Music, and Deezer. There’s no cellular connection built in, so if you want to stream music then you’ll have to bring your phone.
The Venu 2S is 5ATM water-resistant and comes with a 1.1-inch AMOLED display, surrounded by a stainless-steel bezel in either gold, silver, rose gold, or black, with silicone bands in beige, gray, white, or black, respectively. The Venu 2 is a bit larger at 1.3 inches and either comes with a navy or black silicone band and silver or black bezels for each. They’re both available now for the same $399.99 price, which may seem high, grazing Apple Watch territory, but if you’re serious about your training, Garmin’s watches have proven they’re worth a look.
Minisforum’s UM250 is a very small form factor PC with the power and the ports to take on a lot of tasks. And due to its choice of an older CPU, it’s pretty cheap, too.
A couple of months ago, we reviewed Minisforum’s Comet Lake i5-powered U850. The UM250 we’re looking at today is cut largely from the same cloth—it’s got 16GiB RAM, flagship Intel Wi-Fi 6, a 256GB SSD, two wired Ethernet ports, and an attractive VESA-mountable case that’s easy to work on (and in).
The biggest real-world difference between the two models is price: $430 for the fully loaded, AMD-powered UM250 versus $700 for the Intel-powered U850.
(Ars Technica may earn compensation for sales from links on this post through affiliate programs.)
Like most of Minisforum’s models, the UM250 is an unassuming little silver-and-black brick stuffed with ports—including four USB type-A ports and enough video out to drive three displays via USB-C, DisplayPort, and full-size HDMI.
The UM250 we tested is “fully loaded” with 16GiB of socketed dual-channel RAM, a 256GB Kingston M.2 SSD, and a copy of Windows 10 Professional. If you’re looking to supply your own RAM, SSD, and OS there’s also a bare-bones version on Minisforum’s store at $320.
The reason the UM250 is so relatively inexpensive (not much more than half the cost of the Intel-powered U850) is the Ryzen 5 Pro 2500U powering it. The UM250’s 2500U is almost two years older than the Comet Lake i5 in the U850, but it goes neck-and-neck with the newer, more expensive Intel part in most benchmarks. Heck, the Ryzen even wins in some areas.
Minisforum also shaved off some cost by only providing a single SATA port versus the U850’s two, and by using a slower M.2 SATA model of the Kingston SSD. The UM250 also offers dual RTL8111 Gigabit Ethernet versus the U850’s RTL8111 Gigabit + Intel 2.5Gbps Ethernet. We suspect most of the folks in the market for this sort of mini-PC won’t mind those sacrifices, especially when considering they come at nearly $300 off the retail cost.
Moving past raw specs, the UM250 is pleasant to share an office with. Even in Time Spy and Cinebench R20 multi-threaded testing, its cooling fan stays reasonably quiet. If you’re close to it in a dead silent environment, you’ll be able to hear it—but even then, it’s a steady clean whoosh without any bearing whine. This mini-PC is slow to change RPMs rather than rapidly spinning up and down repeatedly.
Inside the UM250
Specs at a glance: UM250
Ryzen 5 Pro 2500U
Windows 10 Pro (pre-installed) / Linux supported
16GiB DDR4 (2x 8GiB SODIMM)
Vega 6 (integrated)
M.2 Intel AX200 Wi-Fi 6, dual-band + BlueTooth 5.1
Kingston M.2 256GB SATA SSD
one SATA port
one full-size HDMI 2.0
one full-size DisplayPort
one USB-C (full featured)
DC barrel jack
four USB3.1 Type-A
two 1Gbps Ethernet (Realtek 8111H)
one 3.5 mm audio
Price as tested
$430 at Amazon / $470 at Minisforum
Much like the U850, the UM250 is extremely easy to get into and work on/in. The top plate can be removed by gently pushing two corners and letting it pop out (similar to some kitchen cabinet doors). Once inside the UM250, you’re presented with a socketed NVMe SSD on the left, an unpopulated SATA power+data connector in the center, and two socketed DDR DIMMs on the right.
Unlike the more expensive U850, the UM250 only offers a single SATA connector—and no sunken drive bays in the chassis itself. Instead, you can bolt a 2.5″ SATA HDD or SSD to the underside of the top plate. This is functional but a little irritating, since it means your SATA cable is attached to the plate you must remove to get into the box.
But again, considering the massive price disparity between the U850 and UM250, we’re not complaining. We’re just happy there’s a SATA connector and mounting bracket at all, given that the primary drive is NVMe.