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Category: mobile phones

The high resolution and wealth of data provided by an experiment at Diamond can lead to unexpected discoveries. The piezoelectric properties of the ceramic perovskite PMN-PT (0.68Pb(Mg1/3Nb2/3)O3–0.32PbTiO3) are widely used in commercial actuators, where the strain that is generated varies continuously with applied voltage. However, if the applied voltage is cycled appropriately then there are discontinuous changes of strain. These discontinuous changes can be used to drive magnetic switching in a thin overlying ferromagnet, permitting magnetic information to be written electrically. An international team of researchers used beamline I06 to investigate a ferromagnetic film of nickel when it served as a sensitive strain gauge for single-crystal PMN-PTheir initial interpretation of the results suggested that ferroelectric domain switching rotated the magnetic domains in the film by the expected angle of 90°, but a closer examination revealed the true picture to be more complex.

Their work, recently published in Nature Materials, shows that the ferroelectric domain switching rotated the in the film by considerably less than 90° due to an accompanying shear strain. The findings offer both a challenge and an opportunity for the design of next-generation data storage devices, and will surely be relevant if the work is extended to explore the electrically driven manipulation of more complex magnetic textures.

Some develop electrical charge in response to an applied . This piezoelectric effect means that certain crystals can be used to convert into electricity or vice-versa, and piezoelectric materials are used in a variety of technologies, including the automatic focusing of cameras in mobile phones. For these applications, the strain varies continuously with applied voltage, but cycling the applied voltage can lead to discontinuous changes of strain due to ferroelectric domain switching. These discontinuous changes in strain can be used to drive magnetic switching in a thin ferromagment film, such that data can be written electrically, and stored magnetically.

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On October 3, 2018, cell phones across the United States received a text message labeled “Presidential Alert.” The message read: “THIS IS A TEST of the National Wireless Emergency Alert System. No action is needed.”

It was the first trial run for a new national alert system, developed by several U.S. government agencies as a way to warn as many people across the United States as possible if a disaster was imminent.

Now, a new study by researchers at the University of Colorado Boulder raises a red flag around these alerts—namely, that such emergency alerts authorized by the President of the United States can, theoretically, be spoofed.

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Researchers at the University of Washington have used machine learning to teach an AI system to identify when someone is having a cardiac arrest. The system learned to identify agonal breathing, which occurs when someone gasps for breath during cardiac arrest, with a high degree of accuracy. The technology can be embedded into a variety of listening devices, such as smart speakers or smartphones, to alert authorities and loved ones to someone having a heart attack while they sleep.

Approximately half a million Americans die from cardiac arrest annually. Cardiac arrests often happen while someone is at home in bed. This is particularly dangerous, as there is likely to be no-one around, or no-one awake, to help.

Now, researchers have developed an AI system that can work through smart speakers or a smartphone to monitor for signs of a cardiac arrest while someone sleeps. The system listens for something called agonal breathing, which occurs in about 50% of people who experience a cardiac arrest, and patients who demonstrate this characteristic gasping often have a better chance of surviving.

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Libra’s mission is to create a simple global financial infrastructure that empowers billions of people around the world. It’s powered by blockchain technology and the plan is to launch it in 2020. You can read more about the association here: https://libra.org/&h=AT0Vpgfo9yMWI9A93aDq0V-7D3PwK9TiZGZPAa_BVoal0OPSc35BbUCAtGmGtYCSe1snvx4iyGgzAjJH_SNk9jXahHxaNeiXKs7G6xYhCn5uuyaLAdmvsF_Auh5d95fck0Gjutf9JLxr9JN_ROjt9rS9fxwM60QOalAjhzqyp1shbln_la1VStESZA

Being able to use mobile money can have an important positive impact on people’s lives because you don’t have to always carry cash, which can be insecure, or pay extra fees for transfers. This is especially important for people who don’t have access to traditional banks or financial services. Right now, there are around a billion people who don’t have a bank account but do have a mobile phone.

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And yet still; the system still requires everyone to carry an identification card.

The most extensive and detailed human genome sequence yet has been assembled using a hand-held device roughly the size of a cell phone.

An international team of scientists working at a lab at the University of California, Santa Cruz, created a portable nanopore sequencer that not only used DNA fragments hundreds of times longer than is standard, but closed 12 gaps in the known human genome, according to a UCSC press release. That makes the human genome it assembled the most complete one ever created to date. A paper describing the research was published in the scientific journal Nature Biotechnology.

The sequencer works by identifying changes in the flow of individual molecules of DNA when they pass through a microscopic membrane hole known as a nanopore. The device can read one million letters of DNA at a time, and has now been used to sequence a human individual’s entire genome, according to New Scientist.

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Is a new phone on your holiday shopping list? A “radical” technology being developed at Purdue University that’s making smartphones and other electronic devices more bendable could help save lives one day soon through better health monitoring.

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Nowhere is that clearer than in Africa, which has the world’s lowest share of people using the internet, under 25%. The cohort of 800 million offline people spread across the continent’s 54 countries is younger and growing faster than most, but incomes are lower and a larger share of residents live in rural areas that are tough to wire for internet access—or, for that matter, electricity. Now, however, a handful of phone purveyors are trying in greater earnest to nudge internet-ready upgrades into African markets, with models designed with an eye toward rural priorities (first those of rural India, where they’re already hits), rather than battered thirdhand flip phones from the heyday of the Spice Girls.

About half of humanity don’t have internet access, and a lot of those people are in Africa. Enter a $20 device with smartphone brains and a five-day battery.

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