|
|
Positron Annihilation Lifetime Spectroscopy
(Preview)
Title: Positron Annihilation Lifetime Spectroscopy in the analysis of microstructural changes of Y-TZP ceramics Author: P. Parente, G. Ferro, A. Tucci, L. Esposito, G. Timellini Positron Annihilation Lifetime Spectroscopy (PALS) technique was used for microstructural characterisation o...
|
Blobrana
|
0
|
|
|
|
|
|
Hyperspace Engine
(Preview)
An extraordinary "hyperspace" engine that could make interstellar space travel a reality by flying into other dimensions is being investigated by the United States government.
The hypothetical device, which has been outlined in principle but is based on a controversial theory about the fa...
|
Blobrana
|
1
|
|
|
|
|
|
Vacuum polarisation
(Preview)
Title: e^-e^+ pair creation by vacuum polarisation around electromagnetic black holes Authors: C. Cherubini, A. Geralico, J. Rueda, R. Ruffini The concept of "dyadotorus" was recently introduced to identify in the Kerr-Newman geometry the region where vacuum polarisation proces...
|
Blobrana
|
0
|
|
|
|
|
|
Cosmological Phase Transitions
(Preview)
Title: Cosmological Phase Transitions Authors: Norbert Straumann (Version v2) In this lecture at a school for condensed matter physicists, I begin with basic concepts and tools for investigating phase transitions in quantum field theory. The very different roles of global and gauge symmetrie...
|
Blobrana
|
1
|
|
|
|
|
|
Gaussian gravitational constant
(Preview)
k = 0.01720209895 A3/2S-1/2D-1. In 1939 the International Astronomical Union adopted the above value as a defining constant in astronomy. The value of the astronomical unit is derived from it, and is no longer defined by the actual orbit of the Earth. In modern ephemerides, the mean orbital axis of...
|
Blobrana
|
0
|
|
|
|
|
|
Enriched Xenon Observatory
(Preview)
The Enriched Xenon Observatory is an experiment in particle physics aiming to detect "neutrino-less double beta decay" using large amounts of xenon isotopically enriched in the isotope 136. A 200-kg detector using liquid Xe is currently being installed at the Waste Isolation Pilot P...
|
Blobrana
|
0
|
|
|
|
|
|
NIST super-sensors
(Preview)
What happened in the first trillionth of a trillionth of a trillionth of a second after the Big Bang? Super-sensitive microwave detectors, built at the National Institute of Standards and Technology (NIST), may soon help scientists find out. The new sensors, described today at the American Physi...
|
Blobrana
|
0
|
|
|
|
|
|
Kervaire invariant problem
(Preview)
A team of three has solved a 45-year-old problem in the mathematics of topology. The Kervaire invariant problem is "one of the major outstanding problems in algebraic and geometric topology" says fellow mathematician Nick Kuhn, at the University of Virginia in Charlottesville. [url...
|
Blobrana
|
0
|
|
|
|
|
|
Extra Z bosons
(Preview)
In a forthcoming Physical Review Letter article, a group of physicists at the University of Nevada, Reno are reporting an analysis of an experiment on violation of mirror symmetry in atoms. Their refined analysis sets new limits on a hypothesised particle, the extra Z-boson, carving out the lowe...
|
Blobrana
|
1
|
|
|
|
|
|
Chiral palladium
(Preview)
Researchers at the University of Amsterdam (UvA) have created chiral palladium metal. The most powerful tool in homogeneous transition metal catalysis is ligand design and optimisation. However, as the complexity of the ligands increases, synthetic routes towards these ligands are generall...
|
Blobrana
|
0
|
|
|
|
|
|
Laser ablation system
(Preview)
Electro Scientific Industries, Inc., a leading provider of world-class photonic and laser systems for microengineering applications, today announced that its New Wave Research (NWR) Divisions UP213 laser ablation system helped enable the dating of ancient asteroids at the Department of Geo...
|
Blobrana
|
0
|
|
|
|
|
|
Doubly magic nuclei
(Preview)
An international team of physicists has found strong evidence for the existence of a new doubly magic nucleus with an unconventional configuration of neutrons. The oxygen24 nucleus is also the first doubly-magic nucleus that is very unstable against radioactive decay. In addition to shedding f...
|
Blobrana
|
0
|
|
|
|
|
|
Postperovskite
(Preview)
Title: Electronic and magnetic structures of the postperovskite-type Fe2O3 and implications for planetary magnetic records and deep interiors Authors: Sang-Heon Shima, Amelia Bengtsonb, Dane Morganb, Wolfgang Sturhahnc, Krystle Catallia, Jiyong Zhaoc, Michael Lerchec,d and Vitali Prak...
|
Blobrana
|
0
|
|
|
|
|
|
Residual stresses
(Preview)
Deep hole drilling sounds like a technique that would be used in the oil industry for extracting oil from kilometres inside the Earth. In fact, it is a means of measuring residual stress in complex engineering components, and the holes drilled are only a few centimetres 'deep'. VEQTER Ltd is a leadin...
|
Blobrana
|
0
|
|
|
|
|
|
Atomic quartets
(Preview)
Physicists in Austria have confirmed that four atoms can be coaxed into forming bound states in an ultracold gas - even though pairs of the same atoms do not bind together. The loosely bound quartets had been predicted just six months ago and their discovery is another reminder of just how useful ultr...
|
Blobrana
|
0
|
|
|
