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Category: mobile phones

MIT physicists improve the precision of atomic clocks

Every time you check the time on your phone, make an online transaction, or use a navigation app, you are depending on the precision of atomic clocks.

An atomic clock keeps time by relying on the “ticks” of atoms as they naturally oscillate at rock-steady frequencies. Today’s atomic clocks operate by tracking cesium atoms, which tick over 10 billion times per second. Each of those ticks is precisely tracked using lasers that oscillate in sync, at microwave frequencies.

Scientists are developing next-generation atomic clocks that rely on even faster-ticking atoms such as ytterbium, which can be tracked with lasers at higher, optical frequencies. If they can be kept stable, optical atomic clocks could track even finer intervals of time, up to 100 trillion times per second.

Living tissues are shaped by self-propelled topological defects, biophysicists find

With a new mathematical model, a team of biophysicists has revealed fresh insights into how biological tissues are shaped by the active motion of structural imperfections known as “topological defects.” Published in Physical Review Letters, the results build on our latest understanding of tissue formation and could even help resolve long-standing experimental mysteries surrounding our own organs.

Topological defects are structural imperfections that emerge in systems hosting multiple, incompatible configurations of particles. They can be found in many different kinds of systems—both natural and manmade—but are especially important for describing “active fluids,” which are composed of particles that constantly harvest energy from their surroundings and convert it into motion, generating their own propulsion.

This behavior also underpins the physics of liquid crystal displays, where topological defects emerge in 2D systems of rod-shaped molecules and help determine how light is modulated to produce the images and colors we see every day on our phones, laptops, and TV screens.

PromptSpy is the first known Android malware to use generative AI at runtime

Researchers have discovered the first known Android malware to use generative AI in its execution flow, using Google’s Gemini model to adapt its persistence across different devices.

In a report today, ESET researcher Lukas Stefanko explains how a new Android malware family named “PromptSpy” is abusing the Google Gemini AI model to help it achieve persistence on infected devices.

“In February 2026, we uncovered two versions of a previously unknown Android malware family,” explains ESET.

Google blocked over 1.75 million Play Store app submissions in 2025

Google says that through 2025, it blocked more than 255,000 Android apps from obtaining excessive access to sensitive user data and rejected over 1.75 million apps from being published on Google Play due to policy violations.

The tech giant’s annual review of Android and Google Play security reveals how effective the implemented protection measures were in maintaining an ecosystem with honest developers and compliant apps.

“We’re constantly improving our policies and protections to encourage safe, high-quality apps on Google Play and stop bad actors before they cause harm,” Google says.

A Clearer Look at the Rise of Myopia

Reading this on your phone in the dark?

A new study suggests that focusing up close in low-light settings may contribute to rising myopia rates.

Here’s what the researchers found.

Half of the world’s population will be nearsighted by 2050. Scientists propose that the amount of light reaching the retina in dark environments could be why.

AI learns to perform analog layout design

Researchers at Pohang University of Science and Technology (POSTECH) have developed an artificial intelligence approach that addresses a key bottleneck in analog semiconductor layout design, a process that has traditionally depended heavily on engineers’ experience. The work was recently published in the journal IEEE Transactions on Circuits and Systems I: Regular Papers.

Semiconductors are used in a wide range of technologies, including smartphones, vehicles, and AI servers. However, analog layout design remains difficult to automate because designers must manually arrange structures that determine performance and reliability while meeting a large number of design rules.

Automation has been especially challenging in analog design because layouts are too complex and design strategies differ significantly by circuit. In addition, training data is scarce, since layout data is typically treated as proprietary and is rarely shared outside companies.

New biosensor technology could improve glucose monitoring

A wearable biosensor developed by Washington State University researchers could improve wireless glucose monitoring for people with diabetes, making it more cost-effective, accurate, and less invasive than current models. The WSU researchers have developed a wearable and user-friendly sensor that uses microneedles and sensors to measure sugar in the fluid around cells, providing an alternative to continuous glucose monitoring systems. Reporting in the journal The Analyst, the researchers were able to accurately detect sugar levels and wirelessly transmit the information to a smartphone in real time.

“We were able to amplify the signal through our new single-atom catalyst and make sensors that are smaller, smarter, and more sensitive,” said Annie Du, research professor in WSU’s College of Pharmacy and Pharmaceutical Sciences and co-corresponding author on the work. “This is the future and provides a foundation for being able to detect other disease biomarkers in the body.”

Measuring glucose levels is important for diabetes, helping to keep patients healthy and preventing complications. Continuous glucose monitors on the market require the use of small needles to insert the monitor, and people can get skin irritation or rashes from the chemical processes that are done under the skin. Furthermore, they’re not always sensitive enough.

Claude Opus 4.6 vs GPT 5.3 Codex: Which is better for programming? | Peter Steinberger

Claude Opus 4.6 and GPT 5.3 Codex, two AI models, have different strengths and interaction styles, highlighting the trade-offs between elegance, reliability, and efficiency in their performance ##

## Questions to inspire discussion.

Model Selection Strategy.

🎯 Q: Which AI model should I choose for different programming tasks?

A: Use Opus for interactive roleplay and quick command following with trial-and-error workflows, while Codex excels at delivering elegant solutions when given proper context and reads more code by default.

🔄 Q: How long does it take to effectively switch between AI models?

Continue reading “Claude Opus 4.6 vs GPT 5.3 Codex: Which is better for programming? | Peter Steinberger” | >

Nanolaser on a chip could cut computer energy use in half

Researchers at DTU have developed a nanolaser that could be the key to much faster and much more energy-efficient computers, phones, and data centers. The technology offers the prospect of thousands of the new lasers being placed on a single microchip, thus opening a digital future where data is no longer transmitted using electrical signals, but using light particles, photons. The invention has been published in the journal Science Advances.

“The nanolaser opens up the possibility of creating a new generation of components that combine high performance with minimal size. This could be in information technology, for example, where ultra-small and energy-efficient lasers can reduce energy consumption in computers, or in the development of sensors for the health care sector, where the nanolaser’s extreme light concentration can deliver high-resolution images and ultrasensitive biosensors,” says DTU professor Jesper Mørk, who co-authored the paper together with, among others, Drs. Meng Xiong and Yi Yu from DTU Electro.

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