Articles tagged with Photometry
Researchers developed a fiber-optic method to track Alzheimer's plaques in freely behaving mice, allowing for real-time monitoring and long-term tracking of pathological changes. The technique uses fluorescent dye to bind specifically to amyloid fibrils and provides a minimally invasive way to study disease progression.
The study reveals that two neural pathways in the paraventricular nucleus of the thalamus participate in dynamic regulation of goal pursuits, with PVT+ neurons encoding execution and termination of actions, respectively. Activity in these neurons mirrors motivation parameters such as vigor and satiety.
Researchers have developed a novel experimental platform that combines optical and fMRI techniques to study large-scale brain networks. The platform identified the anterior insular cortex as a key player in controlling the Default Mode Brain Network, which is active during daydreaming, memory retrieval, and envisioning the future.
A team of researchers from ETH Zurich and WSL reconstructed the topography of all Swiss glaciers in 1931 using stereophotogrammetry. They found that the glacier volume halved between 1931 and 2016, with some glaciers losing mass at varying rates depending on factors like altitude, snout shape, and debris coverage.
University of Arizona students developed a comprehensive study to track and characterize the brightness of satellites. The team's work could help astronomers adapt by closing their telescopes' shutters during incoming bright satellites.
Researchers at UC Berkeley have detected a possible free-floating black hole in the Milky Way galaxy using gravitational microlensing. The object's mass is estimated to be between 1.6 and 4.4 times that of the sun, but its nature as a black hole or neutron star remains uncertain.
A new report has provided the first scientific consensus on healthy daily light exposure to support sleep, alertness, and well-being. The recommendations aim to optimize lighting in workplaces, public buildings, and homes to promote healthier body rhythms and improve overall health.
Researchers have created a new type of cholera vaccine consisting of polysaccharides displayed on virus-like particles, generating long-lasting antibody responses in mice. The vaccine shows promise as a next-generation cholera vaccine, potentially replacing current vaccines that last only 2-5 years.
Researchers develop first complete reference method to measure natural brightness of night sky, revealing complex factors affecting glow in upper layers of atmosphere. The study uses network of low-cost photometers to analyze data from 44 darkest places worldwide.
The new approach uses dynamic LED lighting to create 3D images without requiring complex synchronization. The researchers achieved a reconstruction error of just 2.6 millimeters using a smartphone and commercially available LEDs.
A new photometric telescope, Sun-THz, will measure solar flares on the International Space Station. Developed in Brazil, it will work alongside a Russian instrument to take consistent measurements.
The wireless photometer uses an ultrathin probe to record neural activity in freely moving animals with reduced anxiety-like behavior compared to traditional systems. The device offers a new approach to measuring neuronal dynamics in deep brain regions.
Astronomers have discovered a rare Hoag-type galaxy with two circular rings, providing unique insights into galaxy formation and evolution. The galaxy's inner ring is older than its outer ring, suggesting different formation histories for the two components.
Researchers at PTB developed a novel approach to improve spectral distribution curves, correcting distortions caused by measuring instruments. The improved method can be applied in various fields of radiometry and photometry, including broadband and narrowband measurements.
The Lunar Reconnaissance Orbiter Camera (LROC) has updated the coordinates of historic robotic spacecraft on the Moon, providing valuable information for planning future lunar missions. These updates will aid in the creation of an accurate lunar cartographic network, essential for human and robotic exploration.
Researchers at MIT have developed a new endoscopy technology that captures three-dimensional images of the colon surface, making it easier to detect precancerous growths. The technique, known as photometric stereo endoscopy, uses multiple light sources to create visual representations of surface features.
Dartmouth Computer Science Professor Hany Farid and Eric Kee propose a rating system to assess the extent of digital retouching in photos. This metric could incentivize publishers and models to reduce extreme forms of retouching, potentially mitigating adverse effects on body image and public health.
The Aerosol Robotic Network (AERONET) is the world's largest network of ground-based sensors for aerosols, crucial to understanding Earth's climate. AERONET was born from a need to study vegetation using satellites, but Holben shifted focus to aerosols, leading to a better understanding of their role in climate change.
The Maritime Aerosol Network (MAN) initiative uses portable photometers to measure aerosol concentrations over the oceans, contradicting satellite measurements at high latitudes. Researchers hope to improve confidence in aerosol measurements to better predict climate responses to global temperature increases.
A collaboration between students and scientists from NASA's Goddard Space Flight Center aims to identify environmental triggers of pediatric asthma in Baltimore. The Baltimore Student Sun photometer Network (BSSN) will collect daily aerosol data, enhancing science, math, and technology skills for the students involved.