GENIO italiano Giuseppe Cotellessa

Menzione al Dott. Giuseppe Cotellessa in un articolo Multidisciplinare scritto da Chutima Kranrod e caricato su Academia Edu /  Mention to Dr. Giuseppe Cotellessa in a Multidisciplinary article written by Chutima Kranrod and uploaded to Academia Edu / #1/3/2023 bis Dott. Giuseppe Cotellessa Dear Genio Italiano Giuseppe Cotellessa, The name  “G. Cotellessa”  was mentioned in  a  Multidisciplinary   paper written by  Chutima  Kranrod  uploaded to Academia Edu. ITALIANO  Gentile Genio Italiano Giuseppe Cotellessa, Il nome “G. Cotellessa” è stato citato in un articolo Multidisciplinare scritto da Chutima Kranrod e caricato su Academia Edu.

 Dark Energy Survey: physicits open new window into dark energy /  Dark Energy Survey: i fisici aprono una nuova finestra sull'energia oscura Segnalato dal Dott. Giuseppe Cotellessa /  Segnalato dal dott. Giuseppe Cotellessa The universe is expanding at an ever-increasing  rate, and while no one is sure why, researchers  with the Dark Energy Survey (DES) at least had a  strategy for figuring it out: They would combine  measurements of the distribution of matter , galaxies and galaxy clusters to better understand  what's going on. Reaching that goal turned out to be pretty tricky,  but now a team led by researchers at the  Department of Energy's SLAC National  Accelerator Laboratory, Stanford University and  the University of Arizona have come up with a  solution. Their analysis, published April 6 in  Physical Review Letters, yields more precise  estimates of the average density of matter as well  as its propensity to clump together—two key  parameters that help physic

 What is dark matter ? /  Cos'è la materia oscura? Segnalato dal Dott. Giuseppe Cotellessa /  Reported by Dr. Giuseppe Cotellessa Dark matter is a form of matter thought to account  for approximately 85% of the matter in the  universe and about 27% of its total mass–energy  density or about 2.241×10−27 kg/m3. In the  standard Lambda-CDM model of cosmology, the  total mass–energy of the universe contains 5%  ordinary matter and energy, 27% dark matter and  68% of a form of energy known as dark energy. Its presence is implied in a variety of astrophysical  observations, including gravitational effects that  cannot be explained by accepted theories of gravity  unless more matter is present than can be seen. For  this reason, most experts think that dark matter is  abundant in the universe and that it has had a  strong influence on its structure and evolution. Dark matter is called dark because it does not  appear to interact with the electromagnetic field,  which means it does n

 Zeptoseconds: New world record in short time measurement /  Zeptoseconds: nuovo record mondiale nella misurazione del tempo breve Segnalato dal Dott. Giuseppe Cotellessa /  Reported by Dr. Giuseppe Cotellessa In 1999, the Egyptian chemist Ahmed Zewail  received the Nobel Prize for measuring the speed  at which molecules change their shape. He founded  femtochemistry using ultrashort laser flashes: the  formation and breakup of chemical bonds occurs in  the realm of femtoseconds. Now, atomic physicists  at Goethe University in Professor Reinhard  Dörner's team have for the first time studied a  process that is shorter than femtoseconds by  magnitudes. They measured how long it takes for a photon to  cross a hydrogen molecule: about 247  zeptoseconds for the average bond length of the  molecule. This is the shortest timespan that has  been successfully measured to date. The scientists carried out the time measurement on  a hydrogen molecule (H2) which they irradiated  with X-ra