Tag: detect

science

Voyager 1 and 2 detect new kind of solar electron burst

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Dec. 3 (UPI) — Data collected by the Voyager spacecraft, Voyager 1 and 2, has revealed a new type of solar electron burst — the satellites’ instruments detected speeding cosmic ray electrons accelerated by shock waves produced by solar eruptions.

The phenomenon was described Thursday in the Astrophysical Journal by a team of physicists led by the University of Iowa.

The Voyager spacecraft were launched in 1977. In 2012, Voyager 1 left the heliosphere and entered interstellar space. Its younger sibling, Voyager 2, escaped the solar system in 2018.

The two probes are now 14 billion miles from the sun, farther than any human-built objects.

While traveling through interstellar space, the two craft observed electrons accelerating along magnetic field lines, some moving 670 times faster than the shock waves that initially triggered their acceleration.

The cosmic burst events were followed by plasma wave oscillations, detected by the same instruments several

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technology

Researchers hope sensor-based system can help farms detect ammonia

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A team in Denmark has developed a sensor-based system which could help to tackle air pollution by detecting ammonia and other gases emanating from the agriculture sector.

Alongside chemical engineers and chemists, researchers from Aarhus University and the Technical University of Denmark worked on the technology as part of the Ecometa project, which is focused on cutting emissions connected to agriculture. 

The researchers at the universities are focused on photonics, a term the European Commission has described as “the science and technology of light.” Details of their system have been published in the journal “MDPI Photonics.”

According to an announcement earlier this week, those involved in the project have produced an integrated optical sensor which “measures ammonia in the air using a laser, a gas sensor and hollow-core optical fibres.”

Andreas Hansel is a postdoctoral researcher at Aarhus University’s Department of Engineering. In a

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science

Voyager spacecraft detect new type of solar electron burst

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Voyager spacecraft detect new type of solar electron burst
The Voyager spacecraft continue to make discoveries even as they travel through interstellar space. In a new study, University of Iowa physicists report on the Voyagers’ detection of cosmic ray electrons associated with eruptions from the sun–more than 14 billion miles away. Credit: NASA/JPL

More than 40 years since they launched, the Voyager spacecraft are still making discoveries.


In a new study, a team of physicists led by the University of Iowa report the first detection of bursts of cosmic ray electrons accelerated by shock waves originating from major eruptions on the sun. The detection, made by instruments onboard both the Voyager 1 and Voyager 2 spacecraft, occurred as the Voyagers continue their journey outward through interstellar space, thus making them the first craft to record this unique physics in the realm between stars.

These newly detected electron bursts are like an advanced guard accelerated along magnetic field lines in

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science

Indian astronomers detect companion star to V1787 Ori

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Indian astronomers detect companion star to V1787 Ori
The processed NACO Ks band image of V1787 Ori and the 2 nearby stars is shown. V1787 Ori A is shown in the larger green circle. The yellow arrow is pointing towards the wide binary companion V1787 Ori B. Credit: Arun et al., 2020.

Astronomers from India have reported the finding of a companion star to an intermediate-mass Herbig Ae star known as V1787 Ori. The newly detected object turns out to be of M-type and is about 60% less massive than our sun. The discovery was detailed in a paper published November 20 on arXiv pre-print repository.


Located some 1,260 light years away, in the L1641 star-forming region of the Orion A molecular cloud, V1787 Ori (also known as Parenago 2649) is a young (less than 10 million years old) pre-main sequence (PMS) star of spectral type A5. Therefore, based on previous studies, the object has been classified as

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science daily

Detecting bacteria with fluorescent nanosensors: Luminous carbon nanotubes detect pathogens – and are quick and easy to use –

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Researchers from Bochum, Göttingen, Duisburg and Cologne have developed a new method for detecting bacteria and infections. They use fluorescent nanosensors to track down pathogens faster and more easily than with established methods. A team headed by Professor Sebastian Kruß, formerly at Universität Göttingen, now at Ruhr-Universität Bochum (RUB), describes the results in the journal Nature Communications, published online on 25 November 2020.

Traditional methods of detecting bacteria require tissue samples to be taken and analysed. Sebastian Kruß and his team hope to eliminate the need to take samples by using tiny optical sensors to visualise pathogens directly at the site of infection.

Fluorescence changes in the presence of bacterial molecules

The sensors are based on modified carbon nanotubes with a diameter of less than one nanometre. If they are irradiated with visible light, they emit light in the near-infrared range (wavelength of 1,000 nanometres and more), which is

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science daily

Quantum nanodiamonds may help detect disease earlier — ScienceDaily

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The quantum sensing abilities of nanodiamonds can be used to improve the sensitivity of paper-based diagnostic tests, potentially allowing for earlier detection of diseases such as HIV, according to a study led by UCL researchers in the i-sense McKendry group.

Paper-based lateral flow tests work the same way as a pregnancy test in that a strip of paper is soaked in a fluid sample and a change in colour — or fluorescent signal — indicates a positive result and the detection of virus proteins or DNA. They are widely used to detect viruses ranging from HIV to SARS-CoV-2 (lateral flow tests for Covid-19 are currently being piloted across England) and can provide a rapid diagnosis, as the results do not have to be processed in a lab.

The new research, published in Nature, found that low-cost nanodiamonds could be used to signal the presence of an HIV disease marker

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technology current events

Hillel’s Tech Corner: DermaDetect uses phones to detect skin conditions

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There have been several events in my life pertaining to technology that amazed me. When I got my first iPod, I couldn’t figure out how to “take out the CD” and change my music. “What do you mean I don’t have to because all my music is already here?”Then, when I got my first smartphone, it amazed me that all of a sudden I was constantly connected, no matter where I was. And finally, when I got my first digital camera, I couldn’t understand where the film went. These things might sound funny to us now, but it wasn’t that long ago that they all seemed like science fiction.In fact, I remember clearly when I first heard about a camera on a mobile phone. I believe my words were, “That’s ridiculous. Why would anyone need that?”Well, I was wrong, very wrong. Mobile photography has come an extremely long way, and
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science

For the first time, scientists detect the ghostly signal that reveals the engine of the universe

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In research published Wednesday in the journal Nature, scientists reported that they’ve made the first detection of almost-ethereal particles called neutrinos that can be traced to carbon-nitrogen-oxygen fusion, known as the CNO cycle, inside the sun.

It’s a landmark finding that confirms theoretical predictions from the 1930s, and it’s being hailed as one of the greatest discoveries in physics of the new millenium.

“It’s really a breakthrough for solar and stellar physics,” said Gioacchino Ranucci of the Italian National Institute for Nuclear Physics (INFN), one of the researchers on the project since it began in 1990.

The scientists used the ultrasensitive Borexino detector at the INFN’s Gran Sasso particle physics laboratory in central Italy – the largest underground research center in the world, deep beneath the Apennine Mountains, about 65 miles northeast of Rome.

The detection caps off decades of study of the sun’s neutrinos by the Borexino project, and

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science

New telescope in works at Green Bank to detect, map Fast Radio Bursts | News

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A new radio-telescope linked to similar telescopes at two sites in Canada will be built at the Green Bank Observatory, following the National Science Foundation’s award of a $1.7 million grant to a WVU professor studying Fast Radio Bursts.

The horizontal, 60-meter long, 20-meter wide telescope features a cylindrical profile similar to a snowboarding half-pipe. According to iNFOnews.ca, it will operate in concert with similar “Outrigger” telescopes planned for construction at the Algonquin Radio Observatory in Ontario and at a site near Allenby, British Columbia.

The three Outrigger scopes will in turn connect with the similar, but much larger, CHIME (Canadian Hydrogen Intensity Mapping Experiment) radio-telescope in operation since 2017 at the Dominion Radio Astrophysical Observatory near Kaleden, British Columbia. The Outrigger telescopes will triangulate the positions of targeted objects, allowing the CHIME telescope to pinpoint their locations.

The grant to build the new telescope at Green Bank was awarded

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modern technology

New technology at Green Bay Austin Straubel airport makes it easier for TSA to detect explosives

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a desk with a computer: Two state-of-the-art advanced 3D scanners are in use by TSA agents at Austin Straubel International Airport.

© Courtesy of the Transportation Security Administration
Two state-of-the-art advanced 3D scanners are in use by TSA agents at Austin Straubel International Airport.

ASHWAUBENON – Those still traveling for the holidays this year may notice some new 3D scanners at Green Bay Austin Straubel International Airport’s security checkpoints. 

Transportation Security Administration officers are using two state-of-the-art advanced technology computed tomography scanners to inspect passengers’ carry-on luggage, according to a news release from the TSA.

The scanners use sophisticated algorithms to detect explosives by creating 3D images that TSA officers can manipulate on a screen to get a better view of what is inside bags. The scanners create such a clear image of a bag’s contents that the system can automatically detect explosives, including liquids, according to TSA. 



a person sitting on a bench: A passenger approaches the TSA security desk Friday at Green Bay Austin Straubel International Airport.

© Ebony Cox/USA TODAY NETWORK-Wisconsin
A passenger approaches the TSA security desk Friday at Green Bay Austin Straubel International Airport.

“This new technology

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