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50 articles from ScienceDaily

Hidden 15th-century text on medieval manuscripts

Students have discovered lost text on 15th-century manuscript leaves using an imaging system they developed as freshmen. By using ultraviolet-fluorescence imaging, the students revealed that a manuscript leaf held in RIT's Cary Graphic Arts Collection was actually a palimpsest, a manuscript on parchment with multiple layers of writing.

Showing robots how to drive a car...in just a few easy lessons

Researchers have designed a system that lets robots autonomously learn complicated tasks from a very small number of demonstrations -- even imperfect ones. While current state-of-art methods need at least 100 demonstrations to nail a specific task, this new method allows robots to learn from only a handful of demonstrations.

Elephant genetics guide conservation

A large-scale study of African elephant genetics in Tanzania reveals the history of elephant populations, how they interact, and what areas may be critical to conserve in order to preserve genetic diversity of the species.

Three reasons why COVID-19 can cause silent hypoxia

To crack the mystery of what causes silent hypoxia, a condition when oxygen levels in the body are abnormally low, biomedical engineers used computer modeling to test out three different scenarios that help explain how and why the lungs stop providing oxygen to the bloodstream.

Researchers identify features that could make someone a virus super-spreader

Researchers used computer-generated models to numerically simulate sneezes in different types of people and determine associations between people's physiological features and how far their sneeze droplets travel and linger in the air. They found that people's features, like a stopped-up nose or a full set of teeth, could increase their potential to spread viruses by affecting how far droplets...

Predicting forces between oddly shaped nanoparticles

Materials scientists have devised a simplified method for calculating the forces that cause nanoparticles to self-assemble. With this new model and graphical user interface, researchers will be able to make previously impossible predictions about how nanoparticles with a wide variety of shapes will interact with one another. The new method offers opportunities for rationally designing such...

Engineered immune cells elicit broad response to HIV in mice, offering hope for vaccine

Unlike so many other deadly viruses, HIV still lacks a vaccine. The virus has proven especially tricky to prevent with conventional antibodies, in part because it evolves so rapidly in the body. A solution would require coaxing the body into producing a special type of antibody that can act broadly to defeat multiple strains of the virus at once. Scientists have moved closer to attaining that goal...

A neural network learns when it should not be trusted

Researchers have developed a way for deep learning neural networks to rapidly estimate confidence levels in their output. The advance could enhance safety and efficiency in AI-assisted decision making, with applications ranging from medical diagnosis to autonomous driving.

Newborn jets in distant galaxies

Comparing data from VLA sky surveys made some two decades apart revealed that the black hole-powered 'engines' at the cores of some distant galaxies have launched new, superfast jets of material during the interval between the surveys.

First map of bee species around the globe

There are over 20,000 species of bee, but accurate data about how these species are spread across the globe are sparse. However, researchers have now created a map of bee diversity by combining the most complete global checklist of known bee species with the almost 6 million additional public records of where individual species have appeared around the world.

Very hungry and angry, caterpillars head-butt to get what they want

When food is scarce, monarch butterfly caterpillars go from docile to domineering. The results look something like a combination of boxing and 'bumper' cars. The less food, the more likely caterpillars were to try to head-butt each other out of the way to get their fill, lunging and knocking aside other caterpillars to ensure their own survival. And, they are most aggressive right before the final...