Researchers Develop a Paper-Thin Loudspeaker

MIT engineers have developed a paper-thin loudspeaker that can turn any surface into an active audio source. MIT News reports: This thin-film loudspeaker produces sound with minimal distortion while using a fraction of the energy required by a traditional loudspeaker. The hand-sized loudspeaker the team demonstrated, which weighs about as much as a dime, can generate high-quality sound no matter what surface the film is bonded to. To achieve these properties, the researchers pioneered a deceptively simple fabrication technique, which requires only three basic steps and can be scaled up to produce ultrathin loudspeakers large enough to cover the inside of an automobile or to wallpaper a room.

A typical loudspeaker found in headphones or an audio system uses electric current inputs that pass through a coil of wire that generates a magnetic field, which moves a speaker membrane, that moves the air above it, that makes the sound we hear. By contrast, the new loudspeaker simplifies the speaker design by using a thin film of a shaped piezoelectric material that moves when voltage is applied over it, which moves the air above it and generates sound. […]

They tested their thin-film loudspeaker by mounting it to a wall 30 centimeters from a microphone to measure the sound pressure level, recorded in decibels. When 25 volts of electricity were passed through the device at 1 kilohertz (a rate of 1,000 cycles per second), the speaker produced high-quality sound at conversational levels of 66 decibels. At 10 kilohertz, the sound pressure level increased to 86 decibels, about the same volume level as city traffic. The energy-efficient device only requires about 100 milliwatts of power per square meter of speaker area. By contrast, an average home speaker might consume more than 1 watt of power to generate similar sound pressure at a comparable distance. The researchers showed the speaker in action, playing “We Are the Champions” by Queen. You can listen to it here.

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US Opens First Major Silicon Carbide Chip Plant

On Monday, the world’s largest plant for making silicon carbide chips was opened in central New York. Nikkei Asia reports: The $1 billion, 63,000 sq. meter fabrication plant, or “fab,” will be the first of its kind to make 200mm silicon carbide wafers, according to [North Carolina-based Wolfspeed]. Silicon carbide, or SiC, is an alternative to traditional silicon that is gaining popularity due to its energy efficiency when transferring power, something especially useful in electric vehicle manufacturing. Ahead of the fab opening, Wolfspeed announced a partnership with luxury EV maker Lucid Motors. It also has agreements with General Motors and China’s Yutong Group to supply silicon carbide chips for their electric vehicles.

The U.S. share of modern semiconductor manufacturing capacity has declined to 12% from 37% in 1990, according to the Semiconductor Industry Association, a group that has lobbied for the CHIPS Act. This trend, the group says, is largely due to a lack of government investment compared to other nations. […] In New York, there are hopes that other plants will cluster around the Wolfspeed fab. Wolfspeed received $500 million in construction subsidies from New York as the state seeks to expand its semiconductor manufacturing industry, which has generated nearly $6 billion a year in economic impact and over 34,000 jobs, according to [New York Gov. Kathy Hochul].

The grand opening of a modern manufacturing facility has a special resonance in central New York. The fab stands in the Mohawk Valley, an area along the Erie Canal that was once filled with traditional industry but long ago slid into an economic decline that has defined the region in recent times. So far the Wolfspeed facility has created 265 jobs, with a goal of over 600 new jobs by 2029, according to the company. The site sits directly across from a campus of SUNY Polytechnic Institute, New York’s public polytechnic college, and Wolfspeed has given the school $250,000 to help train potential future employees.

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Apple’s Grip On iOS Browser Engines Disallowed Under Latest Draft EU Rules

Europe’s Digital Markets Act — near-finalized legislation to tame the internet’s gatekeepers — contains language squarely aimed at ending Apple’s iOS browser restrictions. The Register reports: The Register has received a copy of unpublished changes in the proposed act, and among the various adjustments to the draft agreement is the explicit recognition of “web browser engines” as a service that should be protected from anti-competitive gatekeeper-imposed limitations. Apple requires that competing mobile browsers distributed through the iOS App Store use its own WebKit rendering engine, which is the basis of its Safari browser. The result is that Chrome, Edge, and Firefox on iOS are all, more or less, Safari.

That requirement has been a sore spot for years among rivals like Google, Mozilla, and Microsoft. They could not compete on iOS through product differentiation because their mobile browsers had to rely on WebKit rather than their own competing engines. And Apple’s browser engine requirement has vexed web developers, who have been limited to using only the web APIs implemented in WebKit for their web apps. Many believe this barrier serves to steer developers toward native iOS app development, which Apple controls.

The extent to which Apple profits from the status quo has prompted regulatory scrutiny in Europe, the UK, the US, and elsewhere. […] Now those efforts have been translated into the text of the DMA, which, alongside the Digital Services Act (DSA), defines how large technology gatekeepers will be governed in Europe. […] In short, when the DMA takes effect in 2024, it appears that Apple will be required to allow browser competition on iOS devices. “The potential for a capable web has been all but extinguished on mobile because Apple has successfully prevented it until now,” said Alex Russell, partner program manager on Microsoft Edge who worked previously as Google Chrome’s first web standards tech lead. “Businesses and services will be able to avoid building ‘apps’ entirely when enough users have capable browsers.”

“There’s a long road between here and there,” he added. “Apple has spent enormous amounts to lobby on this, and they aren’t stupid. Everyone should expect them to continue to play games along the lines of what they tried in Denmark and South Korea.”

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Dell Defends Its Controversial New Laptop Memory

After Dell’s new Compression Attached Memory Module (CAMM) leaked out last week, several tech sites led many to believe that the company was taking a path to “lock out users upgrades.” However, according to PCWorld citing both the person who designed and patented the CAMM standard, as well as the product manager of the first Dell Precision laptop to feature it, “the intent of the new memory module standard is to head-off looming bandwidth ceilings in the current SO-DIMM designs.” They claim that CAMM could increase performance, improve reliability, aid user upgrades, and eventually lower costs too. From the report: Most of the internet hot takes last week, however, reacted to CAMM being proprietary, which is typically viewed as a method to lock people into buying upgrades only from one company. Dell officials, however, insist that’s not the case at all. “One of the tenants of the PC industry is standards,” said Dell’s Tom Schnell, the Senior Distinguished Engineer who designed much of it. “We believe in that; we put standards into our products. We’re not keeping it to ourselves, we hope it becomes the next industry standard.”

Schnell said that Dell isn’t making the modules and has worked with memory companies as well as Intel on this. In the future, a person with a CAMM-equipped laptop will be able to buy RAM from any third party and install it in the laptop. Yes, initially, Dell will likely be the only place to get CAMM upgrades, but that should change as the standard scales up and is adopted by other PC makers. The new memory modules are also built using commodity DRAMs just like conventional SO-DIMMs.

In fact, Dell points out, it’s not even “proprietary” on its own laptops. The first Precision workstations that come with CAMM will also eventually be offered with conventional SO-DIMMs using an interposer. Mano Gialusis, product manager for Precision workstations, said the interposer option goes into the same CAMM mount, too. With CAMM now a reality, Dell’s next step is to get it in front of JEDEC, the memory standards organization, to make it available to others, he said. Why not create a standard from scratch? Schnell said its far easier to get a standard minted once it’s proven to work rather than trying to simply create something anew every time. The report goes on to say that Dell does hold patents on the CAMM design “and there will be royalties,” but “no standard can go forward through JEDEC unless the licensing is not anti-competitive, is reasonably priced, and cannot discriminate against a company.”

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Record-Breaking Heat Wave In India Threatens Residents, Crucial Wheat Harvest

A record-breaking heat wave in India exposing hundreds of millions to dangerous temperatures is damaging the country’s wheat harvest, which experts say could hit countries seeking to make up imports of the food staple from conflict-riven Ukraine. NBC News reports: With some states in India’s breadbasket northern and central regions seeing forecasts with highs of 120 Fahrenheit this week, observers fear a range of lasting impacts, both local and international, from the hot spell. Indian Prime Minister Narendra Modi told U.S. President Joe Biden earlier this month that India could step in to ease the shortfall created by Russia’s invasion of Ukraine. The two countries account for nearly a third of all global wheat exports, and the United Nations Food and Agriculture Organization has warned that the conflict could leave an additional 8 million to 13 million people undernourished by next year.

India’s wheat exports hit 8.7 million tons in the fiscal year ending in March, with the government predicting record production levels — some 122 million tons — in 2022. But the country has just endured its hottest March since records began, according to the India Meteorological Department, and the heat wave is dragging well into harvest time. The heat wave is hitting India’s main wheat-growing regions particularly hard, with temperatures this week set to hit 112 F in Lucknow, Uttar Pradesh; 120 F in Chandigarh, Punjab; and 109 F in Bhopal, Madhya Pradesh. Devendra Singh Chauhan, a farmer from Uttar Pradesh’s Etawah district, told NBC News that his wheat crop was down 60 percent compared to normal harvests.

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Are You the Asshole? New AI Mimics Infamous Advice Subreddit

Two artists are illustrating bias in machine learning with data from one of the most opinionated sites on the internet: the r/AmITheAsshole subreddit. Motherboard reports: Now boasting 3.9 million users, the r/AmITheAsshole subreddit has become known as one of the leading forums where users can seek and share advice with virtual strangers. Internet artists Morry Kolman and Alex Petros trained three AI models using comments from over 60,000 posts from the popular subreddit. They filtered the comments according to the original subreddit’s formal voting guidelines where users vote on whether the poster is the asshole or if ESH (Everyone Sucks Here). What results is a positive bot, a negative bot, and a neutral bot that respond to every scenario submitted. The project, funded by Digital Void, aims to illustrate how training data can bias the decision-making abilities of artificial intelligence models. Now, their bots can help you answer the age-old question: Are you the asshole?

Users can submit their own moral dilemmas — real or not — and get a positive, negative, and swing response that can go either way. The three AI models are trained on data derived from Reddit users passing judgment so what results is a funny microcosm of what it’s like to debate on the internet now. Any topic can inspire strong, contradictory reactions from total strangers. “When reading the results of a judgment, note the way in which the AI constructs ideas from snippets of human reasoning,” their website reads. “Sometimes the AI can produce stunning results, but it is fundamentally attempting to mimic the ways that humans put together arguments.”

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Half of Tesla’s New Cars Produced Use Cobalt-Free LFP Batteries

Tesla confirmed that nearly half of all its vehicles produced last quarter are already using cobalt-free iron-phosphate (LFP) batteries. Electrek reports: Over the last few years, CEO Elon Musk has said multiple times that Tesla plans to shift more electric cars to LFP batteries in order to overcome nickel and cobalt supply concerns. Iron phosphate (LFP) batteries, which don’t use nickel or cobalt, are traditionally cheaper and safer, but they offer less energy density, which means less efficient and shorter range for electric vehicles. However, they have improved enough recently that it now makes sense to use cobalt-free batteries in lower-end and shorter-range vehicles. It also frees up the production of battery cells with other, more energy-dense chemistries to produce more longer-range vehicles.

Tesla already moved its Standard Range Model 3 and Model Y produced in China to LFP cells. Last year, Tesla also announced it is “shifting to Lithium Iron Phosphate (LFP) battery chemistry globally” for “standard range vehicles.” It confirmed that the automaker planned to switch the Model 3 Standard Range, also known as Model 3 Rear-Wheel-Drive, being produced in the Fremont factory to LFP cells, too.

Now with the release of Tesla’s Q1 2022 financial results, Tesla confirmed that nearly half of all vehicles produced are now using LFP batteries: “Diversification of battery chemistries is critical for long-term capacity growth, to better optimize our products for their various use cases and expand our supplier base. This is why nearly half of Tesla vehicles produced in Q1 were equipped with a lithium iron phosphate (LFP) battery, containing no nickel or cobalt. Currently, LFP batteries are used in most of our standard range vehicle products, as well as commercial energy storage applications. As a result of our energy efficient motors, a Model 3 with an LFP battery pack can still achieve a 267-mile EPA range.” This would mean that roughly half of Tesla’s volume comes from Model 3 Rear-Wheel-Drive, the cheapest Tesla vehicle, and the Model Y Standard Range, which is only offered in China.

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