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Oct 26, 2024

Pushchino multibeam pulsar search — V. The bright FRB 20190203 detected at 111 MHz

Posted by in category: space

Abstract: We report the discovery of a bright pulse having a dispersion measure (DM) equal to 134.4 \pm 2 pc cm^{-3}, a peak flux density (S_p) equal to 20 \pm 4 Jy and a half-width (W_e) equal to 211 \pm 6 ms. The excessive DM of the pulse, after taking into account the Milky Way contribution, is 114 pc cm^{-3} that indicates its extragalactic origin. Such value of DM corresponds to the luminosity distance 713 Mpc. The above parameters make the pulse to be a reliable candidate to the fast radio burst (FRB) event, and then it is the second FRB detected at such a large \lambda \sim 2.7 m wavelength and the first one among non-repeating FRBs. The normalized luminosity L_
u of the event, which we have designated as FRB 20,190,203, estimated under assumption that the whole excessive DM is determined by the intergalactic environment toward the host galaxy, is equal to \simeq 10^{34} erg s^{-1} Hz{-1}. In addition to the study of radio data we analyzed data from the quasi-simultaneous observations of the sky in the high energy (\ge 80 keV) band by the omnidirectional detector SPI/ACS aboard the INTEGRAL orbital observatory (in order to look for a possible gamma-ray counterpart of FRB 20190203). We did not detect any transient events exceeding the background at a statistically significant level. In the INTEGRAL archive, the FRB 20,190,203 localization region has been observed many times with a total exposure of \sim 73.2 days. We have analyzed the data but were unable to find any reliable short gamma-ray bursts from the FRB 20,190,203 position. Finally we note that the observed properties of FRB 20,190,203 can be reproduced well in the framework of a maser synchrotron model operating in the far reverse shock (at a distance of \sim 10^{15} cm) of a magnetar. However, triggering the burst requires a high conversion efficiency (at the level of 1%) of the shock wave energy into the radio emission.

From: Sergey Tyul’bashev A. [view email].

Oct 26, 2024

New research shows most space rocks crashing into Earth come from a single source

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

The two new studies place the sources of ordinary chondrite types into specific asteroid families – and most likely specific asteroids. This work requires painstaking back-tracking of meteoroid trajectories, observations of individual asteroids, and detailed modelling of the orbital evolution of parent bodies.

The study led by Miroslav Brož reports that ordinary chondrites originate from collisions between asteroids larger than 30 kilometres in diameter that occurred less than 30 million years ago.

The Koronis and Massalia asteroid families provide appropriate body sizes and are in a position that leads to material falling to Earth, based on detailed computer modelling. Of these families, asteroids Koronis and Karin are likely the dominant sources of H chondrites. Massalia (L) and Flora (LL) families are by far the main sources of L-and LL-like meteorites.

Oct 26, 2024

Researchers Discover Command Injection Flaw in Wi-Fi Alliance’s Test Suite

Posted by in categories: internet, security

A security flaw impacting the Wi-Fi Test Suite could enable unauthenticated local attackers to execute arbitrary code with elevated privileges.

The CERT Coordination Center (CERT/CC) said the vulnerability, tracked as CVE-2024–41992, said the susceptible code from the Wi-Fi Alliance has been found deployed on Arcadyan FMIMG51AX000J routers.

“This flaw allows an unauthenticated local attacker to exploit the Wi-Fi Test Suite by sending specially crafted packets, enabling the execution of arbitrary commands with root privileges on the affected routers,” the CERT/CC said in an advisory released Wednesday.

Oct 26, 2024

Eliminating AI Deepfake Threats: Is Your Identity Security AI-Proof?

Posted by in categories: robotics/AI, security

Combat AI impersonation fraud with Beyond Identity’s RealityCheck—your shield against deepfake attacks.

Oct 26, 2024

SEC Charges 4 Companies Over Misleading SolarWinds Cyber Attack Disclosures

Posted by in category: cybercrime/malcode

SEC charges four companies for misleading disclosures regarding the SolarWinds cyberattack, imposing fines totaling $6 million.

Oct 26, 2024

AI mimics neocortex computations with ‘winner-take-all’ approach

Posted by in categories: biotech/medical, robotics/AI

Over the past decade or so, computer scientists have developed increasingly advanced computational techniques that can tackle real-world tasks with human-comparable accuracy. While many of these artificial intelligence (AI) models have achieved remarkable results, they often do not precisely replicate the computations performed by the human brain.

Researchers at Tibbling Technologies, Broad Institute at Harvard Medical School, The Australian National University and other institutes recently tried to use AI to mimic a specific type of computation performed by circuits in the neocortex, known as “winner-take-all” computations.

Their paper, published on the bioRxiv preprint server, reports the successful emulation of this computation and shows that adding it to transformer-based models could significantly improve their performance on image classification tasks.

Oct 26, 2024

Google plans to announce its next Gemini model soon

Posted by in category: robotics/AI

December is shaping up to be a month of dueling AI announcements from OpenAI and Google.

Oct 25, 2024

Robot plays cello delicately, makes history with Swedish orchestra

Posted by in categories: media & arts, robotics/AI

A robot played cello in a curated concert for the Malmö Symphony Orchestra in southern Sweden.


Robotics is driving innovations across various sectors nowadays. This time, a new robot has entered the music arena to transform it. In a recent video, the robot was spotted playing the cello.

The industrial robotic arms with 3D-printed parts performed with the members of the orchestra in Sweden.

Continue reading “Robot plays cello delicately, makes history with Swedish orchestra” »

Oct 25, 2024

After Decades of Searching, Are Physicists Closing In on Dark Matter?

Posted by in categories: cosmology, physics

With no conclusive laboratory results, researchers are turning to other methods to find the elusive substance.

Oct 25, 2024

3D smart energy device integrates radiative cooling and solar absorption

Posted by in categories: robotics/AI, sustainability

A research team led by Professor Bonghoon Kim from DGIST’s Department of Robotics and Mechatronics Engineering has developed a “3D smart energy device” that features both reversible heating and cooling capabilities. Their device was recognized for its excellence and practicality through its selection as the cover article of the international journal Advanced Materials.

The team collaborated with Professor Bongjae Lee from KAIST’s Department of Mechanical Engineering and Professor Heon Lee from Korea University’s Department of Materials Science and Engineering.

Heating and cooling account for approximately 50% of the global energy consumption, contributing significantly to such as global warming and air pollution. In response, solar absorption and radiative cooling devices, which harness the sun and outdoor air as heat and cold sources, are gaining attention as eco-friendly and .

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