Lifeboat Foundation

The research capitalizes on a natural phenomenon: thunderstorms.

NASA Administrator Jim Bridenstine tells me that despite the pandemic, the agency will do its utmost to meet the 2024 Artemis lunar return deadline.

“We continue to assess the impact the COVID-19 pandemic has had on our missions, but we strongly believe that we can still meet the goal of landing the first woman and the next man on the Moon in 2024,” NASA Administrator Jim Bridenstine told me via a headquarters’ spokesperson.

Yet NASA has also experienced shakeups in its human spaceflight directorate that could hinder meeting Artemis’ goals. Case in point, Doug Laverro, Associate Administrator of NASA’s Human Exploration and Operations Mission Directorate, departed less than a month ago.

Continue reading “What A Trump Loss In November Would Mean For NASA’s Lunar Return” »

Nootropics and smart drugs are natural or synthetic substances that can be taken to improve mental performance in healthy people.

They have gained popularity in today’s highly competitive society and are most often used to boost memory, focus, creativity, intelligence and motivation.

Here’s a look at the 14 best and how they enhance performance.

The Homeland Security’s cybersecurity advisory division is cautioning Windows 10 users of the possibility of a wave of cyberattacks due to the recent publication of an exploit code.

“Malicious cyber actors are targeting unpatched systems with the new [threat],” the agency noted on the Homeland Security web site. The agency said it “strongly recommends using a firewall to block server message block ports from the internet and to apply patches to critical- and high-severity vulnerabilities as soon as possible.”

The agency also referred concerned parties to Microsoft’s security guidance posts and notes published by the U.S. Computer Emergency Readiness Team at us-cert.gov.

U.S. fighter jets intercepted Russian bombers twice on Wednesday off the coast of Alaska, the North American Aerospace Defense Command said Wednesday. The intercepts come less than two weeks after U.S. bombers were met by Russian jets over the Black Sea.

NORAD said US F-22 Raptors intercepted a Russian bomber formation early Wednesday that came within 20 nautical miles of the Alaskan coast. NORAD posted images of the incident on Twitter.

The formation consisted of two TU-95 bombers, two SU-35 fighter jets and an A-50 airborne early warning and control aircraft, NORAD said. The second formation consisted of two TU-95 bombers and an A-50 and came within 32 nautical miles of Alaskan shores.

The discovery that at least some Fast Radio Bursts (FRBs) repeat has ruled out cataclysmic events as the progenitors of these particular bursts. FRB 121102 is the most well-studied repeating FRB but despite extensive monitoring of the source, no underlying pattern in the repetition has previously been identified. Here, we present the results from a radio monitoring campaign of FRB 121102 using the 76 m Lovell telescope. Using the pulses detected in the Lovell data along with pulses from the literature, we report a detection of periodic behaviour of the source over the span of 5 yr of data. We predict that the source is currently ‘off’ and that it should turn ‘on’ for the approximate MJD range 59002–59089 (2020 June 2 to 2020 August 28). This result, along with the recent detection of periodicity from another repeating FRB, highlights the need for long-term monitoring of repeating FRBs at a high cadence. Using simulations, we show that one needs at least 100 h of telescope time to follow-up repeating FRBs at a cadence of 0.5–3 d to detect periodicities in the range of 10–150 d. If the period is real, it shows that repeating FRBs can have a large range in their activity periods that might be difficult to reconcile with neutron star precession models.

Color is a foundational aspect of visual experience that aids in segmenting objects, identifying food sources, and signaling emotions. Intuitively, it feels that we are immersed in a colorful world that extends to the farthest limits of our periphery. How accurate is our intuition? Here, we used gaze-contingent rendering in immersive VR to reveal the limits of color awareness during naturalistic viewing. Observers explored 360° real-world environments, which we altered so that only the regions where observers looked were in color, while their periphery was black-and-white. Overall, we found that observers routinely failed to notice when color vanished from the majority of their visual world. These results show that our intuitive sense of a rich, colorful world is largely incorrect.

Color ignites visual experience, imbuing the world with meaning, emotion, and richness. As soon as an observer opens their eyes, they have the immediate impression of a rich, colorful experience that encompasses their entire visual world. Here, we show that this impression is surprisingly inaccurate. We used head-mounted virtual reality (VR) to place observers in immersive, dynamic real-world environments, which they naturally explored via saccades and head turns. Meanwhile, we monitored their gaze with in-headset eye tracking and then systematically altered the visual environments such that only the parts of the scene they were looking at were presented in color and the rest of the scene (i.e., the visual periphery) was entirely desaturated. We found that observers were often completely unaware of these drastic alterations to their visual world. In the most extreme case, almost a third of observers failed to notice when less than 5% of the visual display was presented in color.

Brilliantly colored chameleons, butterflies, opals—and now some 3D-printed materials—reflect color by using nanoscale structures called photonic crystals.

A new study that demonstrates how a modified 3D-printing process provides a versatile approach to producing multiple colors from a single ink is published in the journal Science Advances.

Continue reading “Researchers mimic nature for fast, colorful 3D printing” »

Electrons are very much at the mercy of magnetic fields, which scientists can manipulate to control the electrons and their angular momentum—i.e. their “spin.”

A Cornell team led by Greg Fuchs, assistant professor of applied and engineering physics in the College of Engineering, in 2013 invented a new way to exert this control by using acoustic waves generated by mechanical resonators. That approach enabled the team to control electron spin transitions (also known as spin resonance) that otherwise wouldn’t be possible through conventional magnetic behavior.

The finding was a boon for anyone looking to build quantum sensors of the sort used in mobile navigation devices. However, such devices still required a magnetic control field—and therefore a bulky magnetic antenna—to drive certain spin transitions.