Articles by David Appell
Phys.org / Detection of a new state in the protein folding process
Scientists have discovered a new, intermediate state in the process of protein folding, showing folding can occur in two stages, one fast and the next found to be much slower. The findings are published in the journal Physical ...
Phys.org / Finding the best predictor for a galaxy's metallic content
A team of astronomers has found that the total mass of stars in a galaxy is not a good predictor of the galaxy's abundance of heavier elements, a surprising result according to previous studies. Instead, the gravitational ...
Phys.org / Decay of sunspot pair elucidates properties of nearby moving magnetic features
Scientists studying sunspots have found important clues about magnetic features in their decay that will help understand the evolution and real origin of these mysterious magnetic phenomena. The findings are published in ...
Phys.org / Rare decay of the Higgs boson may point to physics beyond the Standard Model
Particle physicists have detected a novel decay of the Higgs boson for the first time, revealing a slight discrepancy in the predictions of the Standard Model and perhaps pointing to new physics beyond it. The findings are ...
Phys.org / Twins or cousins? Sub-Neptune exoplanets could provide an answer
Astronomers have discovered a pair of exoplanets orbiting an M dwarf star, one of which is the coldest M dwarf planet found by the TESS satellite observatory, making it accessible for follow-up studies of its atmosphere. ...
Phys.org / From 'liquid lace' to the 'Drop Medusa,' researchers compete for the best image of fluid flow
Each year at its annual meeting, the American Physical Society's Division of Fluid Dynamics sponsors a contest for the best images in a variety of categories, all related to the flow of fluids.
Phys.org / Extending the uncertainty principle by using an unbounded operator
A study published in the journal Physical Review Letters by researchers in Japan solves a long-standing problem in quantum physics by redefining the uncertainty principle.
Phys.org / Researchers quantify the onset of turbulence in a pipe bent back on itself
How much stress do pipes undergo when a liquid flows through them, and how does it depend on the degree of curvature of the pipe?
Phys.org / Riding a laser to Mars
Could a laser send a spacecraft to Mars? That's a proposed mission from a group at McGill University, designed to meet a solicitation from NASA. The laser, a 10-meter wide array on Earth, would heat hydrogen plasma in a chamber ...
Phys.org / Levitating and colliding liquid drops
If you've seen water drops dance and jitter on a hot pan or griddle, you've seen the Leidenfrost effect in action. Or you may have seen the "Mythbusters" episode where Adam and Jamie thrust their wet fingers and hands into ...
Phys.org / Controlling self-doping in magnetite with temperature
One of the most abundant iron-containing minerals on Earth, and also the oldest known magnetic material, is magnetite, Fe3O4. Magnetite has applications in many fields, such as the study of paleomagnetism—magnetism in rocks ...
Phys.org / The earliest atmosphere on Mercury
Mercury is a most unusual planet. The smallest planet in the solar system, and the closest planet to the sun, it is in a 3:2 spin resonance, slowly turning and experiencing scorching heat up to 430 degrees Celsius, and the ...
