Menu

Blog

Page 3790

Nov 28, 2022

Researchers publish 31,618 molecules with potential for energy storage in batteries

Posted by in categories: chemistry, information science, robotics/AI, supercomputing

Scientists from the Dutch Institute for Fundamental Energy Research (DIFFER) have created a database of 31,618 molecules that could potentially be used in future redox-flow batteries. These batteries hold great promise for energy storage. Among other things, the researchers used artificial intelligence and supercomputers to identify the molecules’ properties. Today, they publish their findings in the journal Scientific Data.

In recent years, chemists have designed hundreds of molecules that could potentially be useful in flow batteries for energy storage. It would be wonderful, researchers from DIFFER in Eindhoven (the Netherlands) imagined, if the properties of these molecules were quickly and easily accessible in a database. The problem, however, is that for many molecules the properties are not known. Examples of molecular properties are redox potential and water solubility. Those are important since they are related to the power generation capability and energy density of redox flow batteries.

To find out the still-unknown properties of molecules, the researchers performed four steps. First, they used a and smart algorithms to create thousands of virtual variants of two types of molecules. These molecule families, the quinones and aza aromatics, are good at reversibly accepting and donating electrons. That is important for batteries. The researchers fed the computer with backbone structures of 24 quinones and 28 aza-aromatics plus five different chemically relevant side groups. From that, the computer created 31,618 different molecules.

Nov 28, 2022

Why ‘Contact’ still resonates after 25 years

Posted by in categories: alien life, government

25 years ago, the film Contact made its theatrical debut starring Jodie Foster and Matthew McConaughey and told the story of Dr. Eleanor Arroway (Jodie Foster) who picked up a radio signal from the star Vega and how this discovery impacted not just herself, but humanity as a whole. Over time, she discovers the signal has embedded instructions sent by the aliens to build a device capable of sending one person into outer space, presumably to meet the Vegans.

The device is built, and she is eventually hurled through a series of outer space tunnels where she meets an alien in the form of her long-deceased father. Right before she’s sent back home, the alien informs her, “This was just a first step. In time you’ll take another.” When she awakens, her colleagues inform her the pod she sat in fell straight through the device and she never actually left. With no hard evidence of both her travels and meeting the aliens, Eleanor is left scrutinized by both the public and Congress. She is ultimately given a “healthy grant” to fund further research into finding more signals from ET, and the film ends with her pondering her journey to the stars.

While some moviegoers were bummed that they didn’t see the aliens—who instead downloaded Jodie Foster’s consciousness so they could talk to her easier—the important message of the film, and the book that it’s based on, is to persevere, but also knowing there will be hardships and sacrifices along the way. In the case of Eleanor, she loses her father at a very young age who had gotten her hooked on astronomy. Later, she passes on love with Palmer Joss (Matthew McConaughey) to remain in pursuit of her research, all while consistently being roadblocked by her former boss. And even after she reaches her goal of contacting the aliens who sent the message, she’s still scrutinized and ridiculed.

Nov 28, 2022

Two minerals never before been seen on Earth found inside 17-ton meteorite

Posted by in category: futurism

The minerals were found inside a slice of the El Ali meteorite, which landed in Somalia in 2020.

Nov 28, 2022

Scientists Say Stuff Might Have Been Happening Before the Big Bang

Posted by in category: cosmology

An international team of researchers are suggesting that our understanding of the origins of our universe may need some updates.

As detailed in a new paper published this week in The Astrophysical Journal Letters, they say the universe may have begun with a “Big Bounce” rather than a Big Bang.

In other words, the cosmos may have been born following of the end of a previous cosmological phase — a bounce — and not the result of space-time inflating exponentially into existence.

Nov 28, 2022

Rolls-Royce successfully tests hydrogen-powered jet engine

Posted by in categories: energy, transportation

LONDON, Nov 28 (Reuters) — Britain’s Rolls-Royce (RR.L) said it has successfully run an aircraft engine on hydrogen, a world aviation first that marks a major step towards proving the gas could be key to decarbonising air travel.

The ground test, using a converted Rolls-Royce AE 2100-A regional aircraft engine, used green hydrogen created by wind and tidal power, the British company said on Monday.

Rolls and its testing programme partner easyJet (EZJ.L) are seeking to prove that hydrogen can safely and efficiently deliver power for civil aero engines.

Nov 28, 2022

Acer fixes UEFI bugs that can be used to disable Secure Boot

Posted by in category: cybercrime/malcode

Acer has fixed a high-severity vulnerability affecting multiple laptop models that could enable local attackers to deactivate UEFI Secure Boot on targeted systems.

The Secure Boot security feature blocks untrusted operating systems bootloaders on computers with a Trusted Platform Module (TPM) chip and Unified Extensible Firmware Interface (UEFI) firmware to prevent malicious code like rootkits and bootkits from loading during the startup process.

Reported by ESET malware researcher Martin Smolar, the security flaw (CVE-2022–4020) was discovered in the HQSwSmiDxe DXE driver on some consumer Acer Notebook devices.

Nov 28, 2022

Malicious Android app found powering account creation service

Posted by in category: mobile phones

A fake Android SMS application, with 100,000 downloads on the Google Play store, has been discovered to secretly act as an SMS relay for an account creation service for sites like Microsoft, Google, Instagram, Telegram, and Facebook.

A researcher says the infected devices are then rented out as “virtual numbers” for relaying a one-time passcode used to verify a user while creating new accounts.

While the app has an overall rating of 3.4, many user reviews complain that it is fake, hijacks their phones, and generates multiple OTPs (one-time passwords) upon installation.

Nov 28, 2022

Meta fined €265M for not protecting Facebook users’ data from scrapers

Posted by in category: futurism

Meta has been fined €265 million ($275.5 million) by the Irish data protection commission (DPC) for a massive 2021 Facebook data leak exposing the information of hundreds of million users worldwide.

This concludes the DPC’s investigation of potential GDPR violations by Meta, launched on April 14, 2021, following the publishing of data belonging to 533 million Facebook users on a hacker forum.

The exposed data included personal information, such as mobile numbers, Facebook IDs, names, genders, locations, relationship statuses, occupations, dates of birth, and email addresses.

Nov 28, 2022

Fuel Ignition and Bottle Bubbles Snag Video Prize

Posted by in categories: energy, supercomputing

An annual APS video prize went to supercomputer simulations, control of chaotic Faraday waves, and studies of a large bubble in a bottle.

Nov 28, 2022

Machine-Learning Model Reveals Protein-Folding Physics

Posted by in categories: biological, information science, physics, robotics/AI

An algorithm that already predicts how proteins fold might also shed light on the physical principles that dictate this folding.

Proteins control every cell-level aspect of life, from immunity to brain activity. They are encoded by long sequences of compounds called amino acids that fold into large, complex 3D structures. Computational algorithms can model the physical amino-acid interactions that drive this folding [1]. But determining the resulting protein structures has remained challenging. In a recent breakthrough, a machine-learning model called AlphaFold [2] predicted the 3D structure of proteins from their amino-acid sequences. Now James Roney and Sergey Ovchinnikov of Harvard University have shown that AlphaFold has learned how to predict protein folding in a way that reflects the underlying physical amino-acid interactions [3]. This finding suggests that machine learning could guide the understanding of physical processes too complex to be accurately modeled from first principles.

Predicting the 3D structure of a specific protein is difficult because of the sheer number of ways in which the amino-acid sequence could fold. AlphaFold can start its computational search for the likely structure from a template (a known structure for similar proteins). Alternatively, and more commonly, AlphaFold can use information about the biological evolution of amino-acid sequences in the same protein family (proteins with similar functions that likely have comparable folds). This information is helpful because consistent correlated evolutionary changes in pairs of amino acids can indicate that these amino acids directly interact, even though they may be far in sequence from each other [4, 5]. Such information can be extracted from the multiple sequence alignments (MSAs) of protein families, determined from, for example, evolutionary variations of sequences across different biological species.