Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Dirceu Portes"'
Publikováno v:
Quantum Physics Letters. 2:11-15
In this work we derive a novel procedure for obtaining the bosonic Bogoliubov vacuum states by using a recursive scheme. The vacuum state for the new creation and annihilation operators is explicitly constructed in terms of the number states of the o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e643a7fead8f78783a3fc87bf15b6c0d
https://doi.org/10.12785/qpl/020102
https://doi.org/10.12785/qpl/020102
Dynamics of single-bubble sonoluminescence. An alternative approach to the Rayleigh–Plesset equation
Autor:
Ricardo C. Paschoal, Hilario Rodrigues, Dirceu Portes, Ana L. F. de Barros, A. L. M. A. Nogueira
Publikováno v:
European Journal of Physics. 39:025807
Sonoluminescence is the phenomenon in which acoustic energy is (partially) transformed into light as a bubble of gas collapses inside a liquid medium. One particular model used to explain the motion of the bubble's wall forced by acoustic pressure is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cc1b9921575bd5d5ffda44f260102fc
https://doi.org/10.1088/1361-6404/aaa03d
https://doi.org/10.1088/1361-6404/aaa03d
Publikováno v:
European Journal of Physics. 29:527-537
We present a study of the ascending vertical motion of a self-propelled body under a uniform gravitational field suffering the action of two different types of air friction forces: linear on the velocity, which is valid for slowly moving bodies, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3c389d0ca1d34e6bc0e9f1ceb3d6e0e
https://doi.org/10.1088/0143-0807/29/3/013
https://doi.org/10.1088/0143-0807/29/3/013
This work is basically about the general form of Newton's second law for variable mass problems. We develop a model for describing the motion of the one-dimensional oscillator with a variable mass within the framework of classroom physics. We present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48ef4c5a795620250e99ef1dea58d21f
Publikováno v:
Proceedings of XXXIV edition of the Brazilian Workshop on Nuclear Physics — PoS(XXXIV BWNP).
In this work we present a simplified effective description of the final state of the gravitational collapse of a uniformly rotating protoneutron star, approximated by a compressible homogeneous triaxial ellipsoid. The generation of gravitational wave
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9f923ed89878fb46398b9c3ccc8d28a
https://doi.org/10.22323/1.142.0099
https://doi.org/10.22323/1.142.0099
Autor:
Ana L F de Barros, Álvaro L M A Nogueira, Ricardo C Paschoal, Dirceu Portes Jr, Hilario Rodrigues
Publikováno v:
European Journal of Physics; Mar2018, Vol. 39 Issue 2, p1-1, 1p
Publikováno v:
Physics Education; Sep2014, Vol. 49 Issue 5, p1-1, 1p