Tech
Solid-state device harvests body heat to power battery-free wearables and IoT sensors

A research team affiliated with UNIST has unveiled a technological advancement that allows body heat to generate electricity sufficient to power electronic devices. This innovation paves the way for the commercialization of battery-free wearable gadgets and Internet of Things (IoT) sensors that operate solely on heat generated by the human body.
Led by Professor Sung-Yeon Jang from the School of Energy and Chemical Engineering at UNIST, the research team developed the world’s first high-performance n-type solid-state thermogalvanic cell capable of powering actual electronic devices. The paper is published in the journal Energy & Environmental Science.
Thermogalvanic cells are compact generators that convert temperature differences—such as the human body temperature (~36°C) versus surrounding air (20–25°C)—into electrical energy. However, due to the minimal temperature gradient, previous systems struggled to produce enough power to operate real-world electronics.
The newly developed solid-state device overcomes this challenge by delivering sufficient voltage and current to power practical devices. While solid-state designs typically offer advantages such as safety from leakage, ion mobility issues within the electrolyte have historically limited their current output. The research team engineered an electrolyte that facilitates efficient ion transport, and further, the thermally driven ion diffusion enhances overall output voltage.
By connecting 100 of these cells in series—similar to building with LEGO blocks—approximately 1.5V can be generated from body heat, comparable to standard AA batteries. Connecting 16 such series-connected modules enables the activation of devices like LED lights, electronic clocks, and temperature/humidity sensors.
Notably, the cell’s Seebeck coefficient (voltage change per temperature difference) is –40.05 mV/K, representing up to a fivefold increase over conventional n-type cells. The device also demonstrated excellent durability, maintaining consistent performance after 50 charge-discharge cycles.
The core of this solid-state cell comprises a conductive polymer, PEDOT:PSS, and a redox couple of Fe(ClO₄)₂/3. Electrostatic interactions between the negatively charged sulfonate groups (–SO₃⁻) of the polymer and the Fe²⁺/Fe³⁺ ions establish a stable structure, while perchlorate ions (ClO₄⁻) are free to move, facilitating ion diffusion and thermodiffusion effects that boost power output.
Professor Jang stated, “This research marks a new milestone in low-temperature waste heat energy harvesting and flexible energy conversion devices. It has the potential to serve as a self-powered system for wearable electronics and autonomous IoT devices driven solely by body heat.”
More information:
Jeong-Ye Baek et al, Solid-state n-type thermodiffusion-assisted thermogalvanic cells with unprecedented thermal energy conversion, Energy & Environmental Science (2025). DOI: 10.1039/D5EE01216C
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Solid-state device harvests body heat to power battery-free wearables and IoT sensors (2025, September 8)
retrieved 8 September 2025
from https://techxplore.com/news/2025-09-solid-state-device-harvests-body.html
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Tech
OpenAI backs AI-animated film for Cannes debut

ChatGPT-maker OpenAI is backing the production of a feature-length animated film created largely with artificial intelligence tools, aiming to prove the technology can revolutionize Hollywood filmmaking with faster timelines and lower costs.
The movie, titled “Critterz,” follows woodland creatures on an adventure after their village is disrupted by a stranger, with producers hoping to premiere at the Cannes Film Festival in May 2026 before a global theatrical release, they said in statement on Monday.
The project has a budget of under $30 million and a production timeline of just nine months—a fraction of the typical $100-200 million cost and three-year development cycle for major animated features.
“Critterz” originated as a short film by Chad Nelson, a creative specialist at OpenAI, who began developing the concept three years ago using the company’s DALL-E image generation tool.
Nelson has partnered with London-based Vertigo Films and Los Angeles studio Native Foreign to expand the project into a full-length feature.
“OpenAI can say what its tools do all day long, but it’s much more impactful if someone does it,” Nelson said in the news release. “That’s a much better case study than me building a demo.”
The production will blend AI technology with human work.
Artists will draw sketches that are fed into OpenAI’s tools, including GPT-5 and image-generating models, while human actors will voice the characters.
The script was written by some of the same writers behind the successful “Paddington in Peru.”
However the project comes amid intense legal battles between Hollywood studios and AI companies over intellectual property rights.
Major studios including Disney, Universal and Warner Bros. Discovery have filed copyright infringement lawsuits against AI firm Midjourney, alleging the company illegally trained its models on their characters.
The film is funded by Vertigo’s Paris-based parent company, Federation Studios, with about 30 contributors sharing profits through a specialized compensation model.
Critterz will not be the first animated feature film made with generative AI.
In 2024, “DreadClub: Vampire’s Verdict,” considered the first AI animated feature film and made with a budget of $405, was released, as well as “Where the Robots Grow.”
Those releases, as well as the original “Critterz” short film, received mixed reactions from viewers, with some critics questioning whether current AI technology can produce cinema-quality content that resonates emotionally with audiences.
© 2025 AFP
Citation:
OpenAI backs AI-animated film for Cannes debut (2025, September 9)
retrieved 9 September 2025
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Tech
40 years of ‘Mario’ games that have grown up with fans

Surrounded by thousands of objects bearing the likeness of Nintendo’s mustachioed plumber, 40-year-old Kikai reflects that his “life would be totally different without Mario” who also marks four decades this week.
The colorful “Super Mario Bros.,” released for Nintendo’s home consoles in Japan on September 13, 1985, was a landmark of early video gaming.
Players controlled the eponymous character as he ran and hopped his way from left to right through a colorful world of platforms, pipes and scowling enemies—all set to the jaunty eight-bit music that has stuck in minds for decades.
“My father bought me the game, and I’ve been playing for as long as I can remember,” Kikai told AFP in his office lined with somewhere between 20 and 30 thousand Mario-related objects, from plastic figurines to plush toys and carpets.
Created by legendary game designer Shigeru Miyamoto, Mario has obsessed several generations of fans like Kikai.
The character’s first appearance came in 1981 arcade game “Donkey Kong,” when he was known simply as “Jumpman.”
Mario’s christening came in 1983 with the “Mario Bros.” arcade cabinet, but his true rise to fame was with “Super Mario Bros.” on Nintendo’s Famicom console (known as the NES in Europe), which has sold more than 40 million copies.
‘Lucky accident’
“It was a lucky accident, because at the start there was no plan for this character to become a video gaming icon,” said Alexis Bross, the French co-author of the book “Mario Generations.”
The plumber’s look was initially chosen to conserve scarce computing resources and make him stand out on screen, with bright blue overalls and a cap that saved on animating hair.
Miyamoto created Mario as “a completely functional character under very strict technical constraints” governing the few pixels making up his image, Bross noted.
But as the games endured through the years, their star became a “generation-spanning” and even “reassuring” presence, he added.
“He’s a regular man, not unlike us, who has no special powers at the outset and stays a bit frozen in time.”
Beyond Mario’s mainline adventures, spinoff games have dropped him, his buddies like brother Luigi and his rivals like dragon Bowser into “Mario Golf,” “Mario Tennis” and the vastly popular “Mario Kart.”
Graphics have evolved from 2D to 3D as the games’ reach has spread to many hundreds of millions of players worldwide.
But the original pixelated look has long inspired artists making their own riffs on the character.
Lyon-based street artist In The Woup, who declined to give his real name, has been mashing Mario up with other characters like Gandalf from “The Lord of the Rings” or “Star Wars” antagonist Darth Vader in guerilla mosaics dotting cities around the world for years.
“Bringing things from my games console out on the street means bringing immaterial things out into real life. I thought that was pretty crazy,” the 39-year-old said, a Mario mask securely concealing his face to keep up his anonymity.
Changing with the times
Many of today’s children and teens have turned towards more recent heavyweight gaming titles such as Fortnite and Roblox.
But Mario still enjoys a high “parental nostalgia” quotient, with those now heading into middle age still buying the games and playing together with their offspring, said Rhys Elliott of analytics firm Alinea.
Nintendo has looked to evolve along with its audience, recently launching a range of baby clothing and accessories in Japan.
Mario also graces goods from luxury watches to Lego, as well as being the star of theme parks in both Japan and the US.
And in 2023, the plucky plumber made a successful leap to the big screen after a 1993 flop that was one of the first ever game-to-movie adaptations.
The more recent film brought in over $1.3 billion, with a sequel in the works for next year.
With gender relations in a different light today than 40 years ago, Mario’s objective in-game is no longer securing a kiss from a grateful rescued princess.
Nintendo’s princesses are more likely these days to star in their own titles, as the company “adapts to new audiences, following little by little developments in society,” author Bross said.
Even now, fans are eagerly awaiting a new Mario-led 3D adventure following the blockbuster release of the Nintendo Switch 2 console this June.
Bross hopes to see “a totally new idea that will be a new milestone in the history of videogames.”
© 2025 AFP
Citation:
40 years of ‘Mario’ games that have grown up with fans (2025, September 9)
retrieved 9 September 2025
from https://techxplore.com/news/2025-09-years-mario-games-grown-fans.html
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Tech
LG Promo Codes and Coupons: 50% Off

LG makes some of the best TVs you can buy. Its OLED TVs in particular are perennial favorites at WIRED, with C-series models like the C4 (9/10, WIRED Recommends) providing among the best performance for your dollars on the market. LG is about way more than TVs of course. The Korean brand offers multiple products across the A/V landscape, from soundbars to Bluetooth speakers, along with a host of other products like home appliances, laptops, and more. Save over 40% with LG promo codes and online exclusive discounts on home appliances, laptops, and more tech.
Save 20% With Today’s LG Promo Codes
If you’re looking to save on LG gear today, you can get up to 20% back on your first order with select eligible products when you sign up for LG rewards with your email address. Simply go to the My LG Membership rewards page, follow the instructions to sign up, fill your cart, and use code WELCOME20.
If you’re ready to check out one of those TVs mentioned above, LG’s C4 and the ultra-bright step-up model G4 are both eligible right now in 77-inch sizes. Otherwise, there are plenty of other products to shop currently on sale that you stack with MyLG Rewards for 5% back and points on every purchase.
Labor Day Discounts: 40% Off TVs, Fridges, Washers, and More LG Coupons
There are also online exclusive offers for the LG’s Labor Day Savings Event continuing to roll out this month. Deals include up to 67% off TVs and appliances, perks like free delivery to the room of choice, and free installation included on a variety of appliances purchased. Some of our favorites are on deep discount, like fridges as low as $599, French Door Refrigerators up to $1,700 off, washer/dryer combos up to $1,000 off, and Smart Wifi enabled ovens and electric/gas ranges up to a whopping $1,900 off.
Fall is near, which means football season—and staying inside more generally—is on the horizon. Now’s a great time to invest in a TV that will last. Samsung has sales just in time, with up to $300 off LG OLED AI Smart TVs, from 55 to 100 inches. Plus, you can get $900 off the new 77 inch Class OLED evo AI C5 4K, now $2,800. There’s also savings of up to $500 off, with same-day pickup in store on select models if you want to purchase with online discounts and get it ASAP—perfect for those in the middle of binging a season when the vertical bars of death appear on the screen. There’s also deals for $499 off the 86 inch QNED evo AI Mini LED 4K Smart TV and $399 off the 75 inch model.
Save Up To $1,000 With LG Bundle Offers and Back to School Tech Deals
Summer is winding down, and back to school deals are back. With discounts of essential academic tech, like up to 40% off lightweight laptops and monitors—plus an extra 5-10% off when you bundle 2 or more). Some bestsellers we’ve seen trending this season are UltraGear Gaming Monitors and Curved UltraWide QHD Monitors. Plus, if you want an upgrade, there’s up to $1,000 off LG gram Copilot/AI enabled laptops. If you need to stock up on tech, LG and LG STUDIO appliances have bundle offers, which include up to $1,000 off with Instant Rebate specials and extra $150 off with trade-in (which includes free delivery).
There are also bonus discounts if you buy LG STUDIO models, including the LG Studio UltraHeat gas cooktop for $600 off, discounts of $800 for the Instaview Electric Slide-in range, and $350 off a Over Range Convection Microwave with Air Fryer.
Students, Teachers, and First Responders Get a 10% Off LG Promo Code
Looking for further discounts? If you’re a teacher, student, or first responder, you could receive an additional LG Promo Code for more savings. To see if you’re eligible, simply click on the LG Appreciation Program link and follow the info to register your account. Exclusive discounts include free installation on refrigerators, cooking ranges, and washer/dryers, including select LG Studio and LG Signature appliances. You could also get year-round savings on LG products with a minimum guaranteed discount of 10% compared to LG.com sale prices.
Get up to 20% Back With MyLG Rewards or 5% Off Referral Code
With MyLG Rewards, you can get up to 20% back in rewards, as well as exclusive deals, extended warranties, and free installation. Eligible rewards members can get an additional 5% off LG products if you refer a friend or loved one with the LG Referral program when they make an eligible purchase of $200 or more. They’ll get 5% off, and you’ll earn 5,000 MyLG Rewards points, so it’s a win-win. This coupon is stackable with other promotions too, so you can still take advantage of the many other featured discounts.
When to Get the Best Discounts on LG of the Year
Black Friday and Cyber Monday are often the biggest times to save on LG gear, but the brand has promotions going all year. Last year’s LG TV models like the C4 and G4 are both on sale right now, as again the company clears out stock for 2025. Those are frankly the best deals you’ll likely see this year, including Black Friday, but if you’re not interested in last year’s models, there are already some discounts on the next wave.
LG’s new evo G5 OLED TV is poised to be one of the brightest, most beautiful TVs released this year. I saw it in person at CES 2025, and from my brief time with it I can already tell you its new quad-stack panel is a scorcher that keeps the perfect black levels and fabulous colors for which LG OLED TVs are praised. They’ve rolled out their latest version, the OLED evo AI G5 4K Smart TV, enhanced with AI for more personalization, an ultra crisp picture, and even less lag time. On top of up to $400 off, get free professional wall mounting, a free $200 TV stand, and $200 off when you bundle with a matching soundbar.
Looking for something for the kitchen or laundry room? You could save $200 on select Heat Pump laundry bundles, or up to 45% off on LG’s best-selling appliances. There are plenty of other ways to save, so if you’re excited to get your LG on, check out these deals now.
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