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Categories: Mathematics: Modeling, Space: Cosmology

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Space: Cosmology Space: Structures and Features
Published

Non-detection of key signal allows astronomers to determine what the first galaxies were -- and weren't -- like      (via sciencedaily.com) 

Researchers have been able to make some key determinations about the first galaxies to exist, in one of the first astrophysical studies of the period in the early Universe when the first stars and galaxies formed, known as the cosmic dawn.

Space: Cosmology Space: Structures and Features
Published

Astronomers observe intra-group light -- the elusive glow between distant galaxies      (via sciencedaily.com) 

Pioneering a new technique, researchers have peered into the extremely faint light that exists between galaxies to describe the history and state of orphan stars.

Computer Science: Artificial Intelligence (AI) Mathematics: Modeling
Published

A simpler path to better computer vision      (via sciencedaily.com) 

Research finds using a large collection of simple, un-curated synthetic image generation programs to pretrain a computer vision model for image classification yields greater accuracy than employing other pretraining methods that are more costly and time consuming, and less scalable.

Mathematics: Modeling
Published

Glass-like shells of diatoms help turn light into energy in dim conditions      (via sciencedaily.com) 

A new study has revealed how the glass-like shells of diatoms help these microscopic organisms perform photosynthesis in dim conditions. A better understanding of how these phytoplankton harvest and interact with light could lead to improved solar cells, sensing devices and optical components.

Space: Cosmology Space: Structures and Features
Published

Short gamma-ray bursts traced farther into distant universe      (via sciencedaily.com) 

Astronomers have developed the most extensive inventory to date of the galaxies where short gamma-ray bursts (SGRBs) originate. Using several highly sensitive instruments and sophisticated galaxy modeling, the researchers pinpointed the galactic homes of 84 SGRBs and probed the characteristics of 69 of the identified host galaxies.

Space: Cosmology Space: Structures and Features
Published

Black holes in eccentric orbit      (via sciencedaily.com) 

A research team has reconstructed the origin of an unusual gravitational wave signal. The signal GW190521 may result from the merger of two massive black holes that captured each other in their gravitational field and then collided while spinning around each other in a rapid, eccentric motion.

Space: Cosmology Space: Structures and Features
Published

NASA's Webb draws back curtain on universe's early galaxies      (via sciencedaily.com) 

A few days after officially starting science operations, NASA's James Webb Space Telescope propelled astronomers into a realm of early galaxies, previously hidden beyond the grasp of all other telescopes until now.

Space: Cosmology Space: Structures and Features Space: The Solar System
Published

2400 new eyes on the sky to see cosmic rainbows      (via sciencedaily.com) 

The Subaru Telescope successfully demonstrated engineering first light with a new instrument that will use about 2400 fiberoptic cables to capture the light from heavenly objects. Full operation is scheduled to start around 2024. The ability to observe thousands of objects simultaneously will provide unprecedented amounts of data to fuel Big Data Astronomy in the coming decade.

Space: Cosmology Space: Exploration Space: Structures and Features
Published

Hubble captures three faces of evolving supernova in early universe      (via sciencedaily.com) 

Three different moments in a far-off supernova explosion were captured in a single snapshot by NASA's Hubble Space Telescope. The star exploded more than 11 billion years ago, when the universe was less than a fifth of its current age of 13.8 billion years.

Mathematics: Modeling
Published

Scientists promote FAIR standards for managing artificial intelligence models      (via sciencedaily.com) 

Computational scientists adopt new framework for making AI models more findable, accessible, interoperable and reusable.

Space: Cosmology Space: Structures and Features Space: The Solar System
Published

A supernova in distant space allows us to understand the origin of the elements in the universe      (via sciencedaily.com) 

A supernova is a stellar explosion, which occurs when the lives of some really massive stars come to an end. In this violent epilogue, the star expels the material from its outer layers by means of a shock wave, allowing us to see the various elements it was composed of.

Space: Cosmology Space: Structures and Features
Published

Red-supergiant supernova: Secrets of an earlier Universe      (via sciencedaily.com)     Original source 

An international research team has measured the size of a star dating back more than 11 billion years ago using images that show the evolution of the star exploding and cooling. The research could help scientists learn more about the early Universe.

Space: Cosmology Space: Structures and Features Space: The Solar System
Published

Oldest planetary debris in our galaxy found from new study      (via sciencedaily.com)     Original source 

Astronomers have identified the oldest star in our galaxy that is accreting debris from orbiting planetesimals, making it one of the oldest rocky and icy planetary systems discovered in the Milky Way.

Space: Cosmology
Published

First glimpse of what gravity looks like on cosmological scales      (via sciencedaily.com) 

Scientists have reconstructed gravity to find a more robust way of understanding the cosmos.

Space: Cosmology Space: Structures and Features
Published

IceCube neutrinos give us first glimpse into the inner depths of an active galaxy      (via sciencedaily.com) 

Scientists have found evidence of high-energy neutrino emission from NGC 1068, also known as Messier 77, an active galaxy in the constellation Cetus and one of the most familiar and well-studied galaxies to date.

Mathematics: Modeling
Published

How network pruning can skew deep learning models      (via sciencedaily.com) 

Computer science researchers have demonstrated that a widely used technique called neural network pruning can adversely affect the performance of deep learning models, detailed what causes these performance problems, and demonstrated a technique for addressing the challenge.

Mathematics: Modeling
Published

Machine learning, from you      (via sciencedaily.com) 

Many computer systems people interact with on a daily basis require knowledge about certain aspects of the world, or models, to work. These systems have to be trained, often needing to learn to recognize objects from video or image data. This data often contains superfluous content that reduces the accuracy of models. So researchers found a way to incorporate natural hand gestures into the teaching process. This way, users can more easily teach machines about objects, and the machines can also learn more effectively.

Mathematics: General Mathematics: Modeling Mathematics: Puzzles
Published

Mathematicians explain how some fireflies flash in sync      (via sciencedaily.com) 

A new study by mathematicians shows that math borrowed from neuroscience can describe how swarms of these unique insects coordinate their light show, capturing key details about how they behave in the wild.

Space: Cosmology Space: Structures and Features
Published

Uncovering the massive quantum mysteries of black holes      (via sciencedaily.com) 

Bizarre quantum properties of black holes -- including their mind-bending ability to have different masses simultaneously -- have been confirmed by physicists.

Mathematics: Modeling
Published

A faster experiment to find and study topological materials      (via sciencedaily.com) 

Researchers have found an efficient way to identify 'topological' materials, whose surfaces can have different electrical or functional properties than their interiors. The approach should make it easier uncover materials that could be the basis of next-generation computer chips or quantum devices.