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Jul 20, 2022

Russian hackers use fake DDoS app to infect pro-Ukrainian activists

Posted by in categories: cybercrime/malcode, mobile phones

Google’s Threat Analysis Group (TAG), whose primary goal is to defend Google users from state-sponsored attacks, said today that Russian-backed threat groups are still focusing their attacks on Ukrainian organizations.

In a report regarding recent cyber activity in Eastern Europe, Google TAG security engineer Billy Leonard revealed that hackers part of the Turla Russian APT group have also been spotted deploying their first Android malware.

They camouflaged it as a DDoS attack tool and hosted it on cyberazov[.]com, a domain spoofing the Ukrainian Azov Regiment.

Jul 20, 2022

The Webb Telescope’s Latest Science Images Show The ‘Phantom Galaxy’ And More In Breathtaking Depth And Detail

Posted by in categories: science, space

Just days after the first formal release of its first show-off images scientists using the new James Webb Space Telescope (JWST) have posted some stunning new images of two spiral galaxies.

Posted on Flickr by Judy Schmidt working on the PHANGS Survey, the stunning image, above, shows the spectacular “Phantom Galaxy” (also called M74 and NGC 628), with others (scroll down) showing another spiral galaxy called NGC 7496.

The incredible new images are testament to Webb’s skill at seeing in infrared and thus seeing through the gas and dust that obscures a lot of what is going on in some of the most arresting objects in the night sky.

Jul 20, 2022

SpaceX Will Launch The New $3.2 Billion ‘Roman’ Space Telescope, Says NASA

Posted by in category: space travel

What is the Roman Space Telescope? A colleague for Webb, Roman will launch in 2026 on a SpaceX Falcon Heavy rocket.

Jul 20, 2022

Extreme heat prompts alerts in 28 states as Texas, Oklahoma hit 115

Posted by in category: futurism

200 million people will experience temperatures in the 90s or higher for the next three days.

Jul 20, 2022

A new Record for the Strongest Magnetic Field Seen in the Universe: 1.6 Billion Tesla

Posted by in categories: cosmology, particle physics

A team of astronomers using the Chinese Insight-HXMT x-ray telescope have made a direct measurement of the strongest magnetic field in the known universe. The magnetic field belongs to a magnetar currently in the process of cannibalizing an orbiting companion.

Magnetars are nasty, but thankfully rare. They are a special kind of neutron star that power up the strongest known magnetic fields.

Continue reading “A new Record for the Strongest Magnetic Field Seen in the Universe: 1.6 Billion Tesla” »

Jul 20, 2022

Chiral molecules beat magnets when it comes to boosting water splitting

Posted by in categories: chemistry, energy, nanotechnology

New electrocatalysis electrodes have been created that are simpler and cheaper than conventional ones, and can substantially increase the efficiency of water splitting. Decorated with chiral molecules like helicenes, these devices double the activity of the oxygen evolution reaction, the bottleneck of the process, and improve its selectivity.

‘With electrocatalysis, we [can] use electrons from renewable sources [like solar and wind] to produce clean chemicals and fuels,’ explains Magalí Lingenfelder from the Max Planck–EPFL laboratory for molecular nanoscience and technology, in Switzerland, who led the study. In this work, her team focused on the oxygen evolution reaction. ‘It’s the bottleneck of water splitting,’ she says. ‘We wanted to increase its performance with cheap, simple solutions.’

Jul 20, 2022

One step closer to providing customized climate control in the office

Posted by in categories: climatology, economics, engineering, sustainability

EPFL researchers have shown that people’s perception of office temperature can vary considerably. Personalized climate control could therefore help enhance workers’ comfort—and save energy at the same time.

Global warming means that heatwaves are becoming ever-more frequent. At the same time, we’re in a global race against the clock to reduce buildings’ energy use and carbon footprint by 2050. This has shone the spotlight on the importance of making the thermal comfort of buildings a strategic and economic priority. And this is the focus of research conducted by Dolaana Khovalyg, a tenure track assistant professor at EPFL’s School of Architecture, Civil and Environmental Engineering (ENAC) and head of the Laboratory of Integrated Comfort Engineering (ICE), which is linked to the Smart Living Lab in Fribourg.

In her latest study, published as a brief, cutting-edge report in the journal Obesity, she highlights the benefits of providing personalized thermal conditioning and heating for each office desk, rather than maintaining a standard temperature throughout an open space. Khovalyg and her team came to this conclusion after the human thermo-physiological data they collected showed that individuals display very different levels of thermal comfort under normal office conditions.

Jul 20, 2022

Material with zero thermal expansion

Posted by in categories: chemistry, physics

It’s a basic rule of chemistry and physics: when you heat things up, they get bigger. While there are exceptions (like water and ice), it’s difficult to find a material with zero thermal expansion.

But new research from the University of New South Wales and the Australian Nuclear Science and Technology Organisation has found a compound that doesn’t thermally expand – at least, not between −269°C and 1126°C.

The researchers examined a substance made from scandium, aluminium, tungsten and oxygen (Sc1.5 Al0.5 W3 O12), bonded together in a crystalline structure.

Jul 20, 2022

World’s Most Modern Heavy Duty Factory — Producing Giant Propellers and Modern CNC Technology

Posted by in category: futurism

https://youtube.com/watch?v=q_DhRSxoVhc

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Jul 20, 2022

Metasurface Optics for Space Applications

Posted by in categories: computing, nanotechnology, space

Metamaterial Space Applications:


In this presentation I will talk about nanophotonics, more specifically metasurfaces – subwavelength patterned surfaces – and explain how this can be used for space applications. As recently displayed by the stunning images from the James Webb space telescope, we often rely on recording the intensity of light (e.g. with a camera) to study the universe. However, light fundamentally has several additional degrees of freedom which can carry information, e.g. polarization, phase, and spectral content. While it is true that many conventional optical components can address these degrees of freedom individually (e.g., polarizers, phase retarders, and filters), metasurfaces enable general manipulations of phase, amplitude, and polarization on the nanoscale, thereby providing ample opportunity to create new versions of existing components and even enable functionality not possible using conventional technologies. In the presentation I will cover several examples of metasurfaces I have been working on and explain their relevance for space applications. I will attempt to explain the working principles, why metasurfaces can be useful, as well as how we fabricate metasurfaces in a cleanroom.

About the speaker: Dr. Tobias Wenger is a postdoc at JPL’s microdevices laboratory (MDL) where his main efforts relate to nanophotonics — light at the nanoscale – and how we can engineer structures and components in order to control light in new ways. Tobias received his PhD from Chalmers University of Technology, Sweden, where he worked on understanding the physical properties of plasmons in graphene.

At JPL, Tobias is applying his knowledge of subwavelength electromagnetics to design metasurface-based optical components, mainly for infrared wavelengths. Metasurfaces are a novel approach to optics which uses subwavelength elements for controlling the phase, amplitude and polarization of transmitted and/or reflected electromagnetic radiation. Tobias research interests intersect optics, computational electromagnetics, and microfabrication and he enjoys both the practical and theoretical aspects of this work. During his postdoc time at MDL, he has worked on metasurface-based optical concentrators, IR detectors, plasmonic filters, wavefront sensing, and grating replication.