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May 23, 2022

New 3D printing method uses light to make objects from opaque resin

Posted by in category: 3D printing

Objects can now be 3D-printed in opaque resin.

May 23, 2022

Asteroid four times the size of the Empire State Building barreling toward Earth on May 27

Posted by in categories: asteroid/comet impacts, existential risks

The asteroid will zoom safely past Earth at 47,200 miles per hour.

The near-Earth asteroid 7,335 (1989 JA) will make a close approach to our planet on May 27, 2022, flying within about 2.5 million miles of Earth.

May 23, 2022

A Spacecraft Just Recorded The Lunar Eclipse Like You’ve Never Witnessed It Before

Posted by in category: biotech/medical

A total lunar eclipse is an incredible sight. As Earth passes between the Moon and the Sun, its shadow slips across the face of our satellite so only long, red wavelengths – sunlight refracted by Earth’s atmosphere – can slip through, tinting the usually pale Moon blood-red.

That’s when we see it from here, on our planet. But from space, the view is very different – and now we can see what that looks like, thanks to the asteroid probe Lucy, led by the Southwest Research Institute (SwRI), launched in October 2021.

Continue reading “A Spacecraft Just Recorded The Lunar Eclipse Like You’ve Never Witnessed It Before” »

May 23, 2022

New electronics cooling tech enables 740% increase in power per unit volume

Posted by in categories: engineering, materials

Tarek Gebrael, a UIUC Ph.D. student in mechanical engineering, explains that the existing solutions suffer from three shortcomings – first, they can be expensive and difficult to scale up. Second, conventional heat spreading approaches generally require that the heat spreader and a heat sink be attached on top of the electronics device. Unfortunately, in many cases, most of the heat is generated underneath the electronic devices, meaning that the cooling mechanism isn’t where it is needed the most.

And third, Gebrael explained, the heat spreaders can’t be installed directly on the surface of the electronics. They require a layer of “thermal interface material” sandwiched between them to ensure good contact. However, due to its poor heat transfer characteristics, that middle layer also introduces a negative impact on thermal performance.

Now, researchers have come up with a new solution to address all three of those problems. First, they used copper as a primary material, which is relatively inexpensive. They then made the copper coating that entirely “engulfs” the device, says Gebrael, “covering the top, the bottom, and the sides… a conformal coating that covers all the exposed surfaces” – so that no heat-producing regions are neglected. And finally, the new solution removes the need for a thermal interface material and a heat sink.

Continue reading “New electronics cooling tech enables 740% increase in power per unit volume” »

May 22, 2022

Infinite-Dimensional Programmable Quantum Processors

Posted by in category: quantum physics

Programmable quantum processors for continuous-variable systems are defined, and investigated in view of their memory requirements, linking universal processors to their discrete counterparts, and deriving upper and lower bounds on the programmability of Gaussian transformations of Bosonic modes.

May 22, 2022

PDF smuggles Microsoft Word doc to drop Snake Keylogger malware

Posted by in category: cybercrime/malcode

Threat analysts have discovered a recent malware distribution campaign using PDF attachments to smuggle malicious Word documents that infect users with malware.

The choice of PDFs is unusual, as most malicious emails today arrive with DOCX or XLS attachments laced with malware-loading macro code.

However, as people become more educated about opening malicious Microsoft Office attachments, threat actors switch to other methods to deploy malicious macros and evade detection.

Continue reading “PDF smuggles Microsoft Word doc to drop Snake Keylogger malware” »

May 22, 2022

On-Surface Synthesis of Rigid Benzenoid- and Nonbenzenoid-Coupled Porphyrin–Graphene Nanoribbon Hybrids

Posted by in categories: chemistry, nanotechnology

On-surface synthesis made the fabrication of extended, atomically precise π-conjugated nanostructures on solid supports possible, with graphene nanoribbons (GNRs) and porphyrin-derived oligomers standing out. To date, examples combining these two prominent material classes are scarce, even though the chemically versatile porphyrins and the atomistic details of the nanographene spacers promise an easy tunability of structural and functional properties of the resulting hybrid structures. Here, we report the on-surface synthesis of extended benzenoid-and nonbenzenoid-coupled porphyrin–graphene nanoribbon hybrids by sequential Ullmann-type and cyclodehydrogenation reactions of a tailored Zn(II) 5,15-bis(5-bromo-1-naphthyl)porphyrin (Por(BrNaph)2) precursor on Au(111) and Ag(111).

May 22, 2022

The Thin-Film Flexible 6502

Posted by in categories: computing, electronics

While our attention is mostly directed towards ever smaller-integrated silicon circuits providing faster and faster computing, there’s another area of integrated electronics that operates at a much lower speed which we should be following. Thin-film flexible circuitry will provide novel ways to place electronics where a bulky or expensive circuit board with traditional components might be too expensive or inappropriate, and Wikichip is here to remind us of a Leuven university team who’ve created what is claimed to be the fastest thin-film flexible microprocessor yet. Some of you might find it familiar, it’s our old friend the 6502.

The choice of an archaic 8-bit processor might seem a strange one, but we can see the publicity advantage — after all, you’re reading about it here because of it being a 6502. Plus there’s the advantage of it being a relatively simple and well-understood architecture. It’s no match for the MHz clock speeds of the original with an upper limit of 71.4 kHz, but performance is not the most significant feature of flexible electronics. The production technology isn’t quite ready for the mainstream so we’re unlikely to be featuring flexible Commodore 64s any time soon, but the achievement is the impressive feat of a working thin-film flexible microprocessor.

Meanwhile, if you’re curious about the 6,502, we took a look at the life of its designer, [Chuck Peddle].

May 22, 2022

Could an advanced civilization change the laws of physics?

Posted by in category: physics

Do the laws of physics place a hard limit on how far technology can develop, or could an advanced civilization re-write those laws?

May 22, 2022

Hubble telescope looks deep into the Needle’s Eye in this dwarf spiral galaxy photo

Posted by in category: space

There’s a mysterious X-ray source and other unknowns in this Hubble telescope photo of the Needle’s Eye galaxy.

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