Archive for the ‘mapping’ category: Page 3

Jul 13, 2022

Mysterious radio “heartbeat” signal detected from distant galaxy

Posted by in categories: cosmology, mapping

Astronomers from MIT report today that they have discovered a mysterious signal with a pattern akin to a heartbeat, emanating from a far-off galaxy that is billions of light-years from Earth. Exactly what the source may be of this regular pulse of radio waves remains a mystery, as it is the first time that such a signal has been recorded.

They have identified the signal as a fast radio burst (FRB), which is typically an intensely strong burst of radio waves of unknown astrophysical origin that lasts only a few milliseconds at most. This new signal, labelled FRB 20191221A, is unusual, because it persists for up to three seconds, which is about 1,000 times longer than the average FRB. Within this time, there are shorter bursts of radio waves that repeat every 0.2 seconds in a clear periodic pattern, similar to that of a beating heart.

Since the first FRB was discovered in 2007, hundreds of similar radio flashes have been detected across the universe, most recently by the Canadian Hydrogen Intensity Mapping Experiment, or CHIME, an interferometric radio telescope that is located at the Dominion Radio Astrophysical Observatory in British Columbia, Canada. CHIME is designed to pick up radio waves emitted by hydrogen in the very earliest stages of the universe, but the telescope is also sensitive to fast radio bursts. Since it began observing the sky in 2018, CHIME has detected hundreds of FRBs emanating from different parts of the sky.

Jul 5, 2022

Cosmic radio pulses probe hidden matter around galaxies

Posted by in categories: mapping, space

Powerful radio pulses originating deep in the cosmos can be used to study hidden pools of gas cocooning nearby galaxies, according to a new study appearing in the journal Nature Astronomy.

So-called , or FRBs, are pulses of that typically originate millions to billions of light-years away ( waves are like the light we see with our eyes but have longer wavelengths and frequencies). The first FRB was discovered in 2007, and since then, hundreds more have been found. In 2020, Caltech’s STARE2 instrument (Survey for Transient Astronomical Radio Emission 2) and Canada’s CHIME (Canadian Hydrogen Intensity Mapping Experiment) detected a massive FRB that went off in our own Milky Way galaxy. Those earlier results helped confirm the theory that the energetic events most likely originate from dead, magnetized stars called magnetars.

As more and more FRBs roll in, researchers are now asking how they can be used to study the gas that lies between us and the bursts. In particular, they would like to use the FRBs to probe halos of diffuse gas that surround galaxies. As the radio pulses travel toward Earth, the gas enveloping the galaxies is expected to slow the waves down and disperse the radio frequencies. In the new study, the researchers looked at a sample of 474 distant FRBs detected by CHIME, which has discovered the most FRBs to date, and showed that the subset of two dozen FRBs that passed through galactic halos were indeed slowed down more than non-intersecting FRBs.

Jul 5, 2022

On-chip bacterial foraging training in silicon photonic circuits for projection-enabled nonlinear classification

Posted by in categories: information science, mapping, robotics/AI

On-chip training of machine learning algorithms is challenging for photonic devices. Here, the authors construct nonlinear mapping functions in silicon photonic circuits, and experimentally demonstrate on-chip bacterial foraging training for projection-based classification.

Jul 4, 2022

NASA just built the best map of Mars to date using 51,000 images

Posted by in categories: computing, mapping, space

It’s effectively a new data set that will fuel the second wave of discoveries about Mars’ surface composition.

But while it was doing that work, it was also gathering lower-resolution mapping strips, about 83,000 of them. Now that CRISM is no longer active, the team is building their map from those strips.

Processing this much data into one cohesive map is a complicated task requiring powerful computing resources. It takes time to optimize the maps and account for environmental conditions and discrepancies between the different images.

Continue reading “NASA just built the best map of Mars to date using 51,000 images” »

Jul 2, 2022

Head Injuries Can Rewire Whole-Brain Networks in Mice, Important New Maps Reveal

Posted by in categories: mapping, neuroscience

We know the brain changes after traumatic injury, and now we have maps from mice showing what that change looks like.

A team of scientists has traced connections between nerve cells throughout the entire brain of mice, showing that distant parts of the brain become disconnected after a head injury.

The stunning visualizations of brain-wide connectivity could help scientists understand how a traumatic brain injury, or TBI, alters cross-talk between different cells and brain regions, first in mice and then in humans.

Continue reading “Head Injuries Can Rewire Whole-Brain Networks in Mice, Important New Maps Reveal” »

Jul 1, 2022

GridRaster Uses the Metaverse to Build High Tech Prototypes and Finished Products

Posted by in categories: augmented reality, mapping, robotics/AI, transportation, virtual reality

An Interview with COO Dijam Panigrahi.

“a unified and shared software infrastructure to empower enterprise customers to build and run scalable, high-quality eXtended Reality (XR) – Augmented Reality (AR), Virtual Reality (VR) and Mixed Reality (MR) – applications in public, private, and hybrid clouds.”

What does that all mean?

Continue reading “GridRaster Uses the Metaverse to Build High Tech Prototypes and Finished Products” »

Jun 26, 2022

The End of the World is Just the Beginning: Mapping the Collapse of Globalization

Posted by in category: mapping

Update your world view. Excellent book.

Enjoy features only possible in digital – start reading right away, carry your library with you, adjust the font, create shareable notes and highlights, and more.

Jun 21, 2022

New Understanding of Earth’s Architecture: Updated Maps of Tectonic Plates

Posted by in category: mapping

New models that show how the continents were assembled are providing fresh insights into the history of the Earth and will help provide a better understanding of natural hazards like earthquakes and volcanoes.

“We looked at the current knowledge of the configuration of plate boundary zones and the past construction of the continental crust,” said Dr. Derrick Hasterok, Lecturer, Department of Earth Sciences, University of Adelaide who led the team that produced the new models.

Continue reading “New Understanding of Earth’s Architecture: Updated Maps of Tectonic Plates” »

Jun 18, 2022

Three burning questions about the first brain reference charts

Posted by in categories: mapping, neuroscience

Scientists have created the first reference charts for the human brain, mapping its growth from infancy to 100 years old. Now, they have to grapple with difficult ethical questions about how they should — and perhaps shouldn’t — be used.

The reference charts are visualizations created from aggregating analyses of over 120,000 brain scans to show ranges in brain size, or gray matter volume, for each age. They also track the human brain’s rapid expansion early in life and its gradual shrinking over time. The researchers primarily developed the charts to provide a standardized measurement that other neuroscientists could use for brain imaging research, with the hope that maybe one day it could lead to a tool used in clinics.

“It’s an absolutely spectacular advancement in neuroscience and neuroimaging,” said Judy Illes, professor of neurology and neuroethics at the University of British Columbia.

Jun 14, 2022

San Diego drone tech startup raises $165M to build AI pilot

Posted by in categories: drones, information science, mapping, robotics/AI

Shield AI, an artificial intelligence company focusing on drones and other autonomous aircraft, is on a mission to build “the world’s best AI pilot.” To that end, the San Diego startup has raised $90 million in equity and $75 million in debt as part of a Series E fundraising round. The funding values Shield AI at $2.3 billion.

Hivemind employs state-of-the-art algorithms for planning, mapping, and state-estimation to enable drones to execute dynamic flight maneuvers. On aircraft, Hivemind enables full autonomy and is designed to run fully on the edge, disconnected from the cloud, in high-threat GPS and communication-degraded environments.

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