Category Archives: Technology and Society

Business, Economics, Health, Science And Society, Technology and Society

A New Antibiotic Weapon Against Superbugs

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This development looks promising. and this is the best part:

SNAPPs appear to pose no threat to healthy tissue, they only attack bacteria. This is in marked contrast to antibiotics that are known to have unpleasant side-effects under certain conditions because they damage both bacteria and healthy tissue. Why do the SNAPPs leave healthy tissue alone? Because the SNAPPs are too big to interact effectively with mammalian cell tissue. They’re like big dogs that attack other big dogs to establish dominance while ignoring tiny dogs that are beneath their notice.

SNAPPs appear to have the potential to work as a substitute in cases where AMR makes treatment with antibiotics ineffective. This is a very good thing, but is it also another short-term solution? Will the bacteria mutate and develop resistance to SNAPPs the same way they have developed resistance to antibiotics?

Lam and her team examined this question by exposing 600 generations of a colistin-resistant superbug to SNAPPs. The superbug the researchers used is known to mutate and acquire antibiotic resistance rapidly but the SNAPPs killed the 600th generation as effectively and easily as they did the first. The researchers speculate that the bacteria are unable to develop resistance because there are so many ways the SNAPPs can kill them.

Faster, please.

Business, Political Commentary, Space, Technology and Society

Space Assembly

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Space Systems Loral has signed an agreement with Firmamentum to build satellites on orbit:

Firmamentum Signs Contract with SSL for In-Space Manufacturing Demo

BOTHELL, WA., 5 October 2016 – Firmamentum, a division of Tethers Unlimited, Inc. (TUI), announced that it has signed a contract with Space Systems Loral (SSL), a leading provider of innovative satellites and spacecraft systems, to prepare a flight demonstration of in-space manufacture of a component on a communications satellite. Firmamentum’s in-space manufacturing hardware is intended to fly as part of SSL’s “Dragonfly” program, which will demonstrate in-space robotic assembly of geostationary (GEO) communications satellites, enabling dramatic improvements in GEO satellite performance and mission flexibility. The Dragonfly program is funded under NASA’s Space Technology Mission Directorate’s (STMD) Tipping Point initiative to work with industry to advance the goals for robotic and human exploration of the solar system through the development of critical space technologies.

Firmamentum’s demonstration will validate a technology for on-orbit additive manufacturing of carbon-fiber composite structures. This technology, called the “Trusselator™”, enables space systems to fabricate large, lightweight, and high-performance truss structures to support antennas, sensors, solar arrays, and other key components. Manufacturing the structure after the satellite has reached orbit allows these components to be significantly larger than if they had to be stowed within a rocket shroud. Increasing the size of these key elements of a satellite enables higher data throughput, higher resolution, higher sensitivity, and higher power than achievable by satellites manufactured entirely on the ground.

“The Dragonfly program is a tremendous opportunity for us to demonstrate the readiness of in-space manufacturing technologies to enable transformative improvements in the performance of communications satellites, and we are very thankful that SSL has selected us to team with in this endeavor,” said Dr. Rob Hoyt, Firmamentum’s CEO.

“The evolution of next generation communications satellites and space systems depends on dramatic advances in technology and manufacturing processes,” said Dr. Matteo Genna, Chief Technology Officer of SSL. “Firmamentum plays a key role on the Dragonfly team and enables us to demonstrate the importance of in-space manufacturing, which we expect will be a significant capability for future missions.”

This is the kind of thing that is going to make systems like SLS look increasingly ridiculous.

Of course, if the current storm predictions hold up, Hurricane Matthew may take care of the problem. The Cape is in the crosshairs, and the VAB wasn’t built to handle a Cat 4 storm.

Business, Economics, Media Criticism, Political Commentary, Space, Technology and Society

The Space Launch System

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A history. I’d dispute this, though:

“Humans are pretty needy,” Lyles told me. “You’re taking water, you’re taking all of their environmental control systems, and whatever they need on a really long mission. A large, heavy launch vehicle is almost a no-brainer.”

NASA is not alone in this conclusion. During a two-week span last month, private companies SpaceX and Blue Origin both unveiled giant, SLS-scale launchers that will become key parts of their future spaceflight aspirations.

One of these things is not like the others. SpaceX and Blue Origin want to build big rockets because they plan to put thousands of people into space. NASA is doing it because Congress wants to keep thousands employed in the right zip codes (as the article makes clear).