Search results for "History of Physics"
showing 10 items of 65 documents
Unified description of structure and reactions: implementing the Nuclear Field Theory program
2015
The modern theory of the atomic nucleus results from the merging of the liquid drop (Niels Bohr and Fritz Kalckar) and of the shell model (Marie Goeppert Meyer and Axel Jensen), which contributed the concepts of collective excitations and of independent-particle motion respectively. The unification of these apparently contradictory views in terms of the particle-vibration (rotation) coupling (Aage Bohr and Ben Mottelson) has allowed for an ever increasingly complete, accurate and detailed description of the nuclear structure, Nuclear Field Theory (NFT, developed by the Copenhagen-Buenos Aires collaboration) providing a powerful quantal embodiment. In keeping with the fact that reactions are…
X-wave bullets with negative group velocity in vacuum.
2006
Propagation-invariant, X waves with negative group velocity are reported. Beam aperturing allows for a comprehensive analysis concerning the causality of the optical signal and forerunner formation.
M9_Microfluidics_for_CNT
2018
The droplets in contact coalesce when exposed to DEP filed.
M10_Microfluidics_for_CNT
2018
Droplets are preferentially directed to the channel with higher flow rate in the passive sorting junction. When the droplets are exposed to DEP field, the DEP force pull them to the narrower channel.
Automated astrographic plates measuring process
1990
The astrographic plates measuring process applied at the Astronomical Observatory of Valencia has been described.
The environmental effects in the origin of angular momenta of galaxies
2011
We study the galaxy alignment in the sample of very rich Abell clusters located in and outside superclusters. The statistically significant difference among investigated samples exists. We found that in contrast to whole sample of cluster, where alignment increase with the cluster richness, the cluster belonging to the superclusters does not show this effect. Moreover, the alignment decreased with the supercluster richness. One should note however that orientations of galaxies in analyzed clusters are not random, both in the case when we analyzed whole sample of the clusters and only clusters belonging to the superclusters. The observed trend, dependence of galaxy alignment on both cluster …
THE ROLE OF CONCEPTUAL FOUNDATIONS OF QUANTUM THEORY IN THE DIALOGUE BETWEEN SCIENCE AND RELIGION
2001
A recent development in the understanding of conceptual foundations of quantum theory is discussed, giving particular attention to the analysis of the so called Schroedinger’s cat paradox. The solution of this problem in the frameworks of Everett-Wheeler many-worlds interpretation of quantum mechanics is considered, as well as the philosophical and theological consequences following from this interpretation. The recommendations are given, concerning the use of questions related with conceptual foundations of quantum theory in the education when introducing students and senior class pupils in problems of the dialogue between science and religion. KEY WORDS: science, religion, dialogue, found…
The Tenth Article of Ettore Majorana
2006
This year is the centenary of the birth of Ettore Majorana, one of the major Italian physicists of all times. In this note we briefly sketch a few biographical details about Ettore Majorana and introduce and discuss the main points of Majorana's 10th article. In his article Majorana explicitly considers quantum mechanics as an irreducible statistical theory because the theory is not able to describe the time evolution of a single particle or atom in a precise environment at a deterministic level. This lack of determinism at the level of an elementary physical system motivated him to suggest a formal analogy between statistical laws observed in physics and in the social sciences. We hope the…
Science and Religion: Controverse or Complementarity
2009
Science and Religion: controverse or complementarity Relations between science and religion since times of Galileo, Newton and Leibniz discussed . Omega point approach considered and interpreted: using Omega point and Tipler's Singularities model, time versus creative order discussed.
The ATHENA X-ray Integral Field Unit (X-IFU)
2018
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States.