Results 11 to 20 of about 131,967 (276)
Applied Sciences, 2023 Fluid wave code communication is used in layered water injection intelligent monitoring systems, but a model of fluid transient flow wave signal transmission is still unknown.
Eryang Ming +5 more
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Generalized velocity-dependent one-scale model for current-carrying strings [PDF]
Physical Review D, 2021 We develop an analytic model to quantitatively describe the evolution of superconducting cosmic string networks. Specifically, we extend the velocity-dependent one-scale (VOS) model to incorporate arbitrary currents and charges on cosmic string worldsheets under two main assumptions, the validity of which we also discuss.
C. J. A. P. Martins +3 more
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Peculiar Velocities and Microwave Background Anisotropies from Cosmic Strings [PDF]
The Astrophysical Journal, 1994 (revised version) 13 pages plus 1 figure available upon request.
Perivolaropoulos, Leandros +1 more
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Scattering of a Long Cosmic String by a Rotating Black Hole [PDF]
, 2002 The scattering of a straight, infinitely long string by a rotating black hole is considered. We assume that a string is moving with velocity v and that initially the string is parallel to the axis of rotation of the black hole.
Contaldi C R +10 more
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Large-scale peculiar velocities from cosmic strings [PDF]
Nature, 1987 Recent observations1–3 indicate that large regions of the Universe 60 h−1 Mpc in radius (where h is the Hubble constant in units of 100 km s−1 Mpc−1) may be streaming coherently with velocities up to 1,000 km s−1 with respect to the rest frame determined by the cosmic microwave background.
E. P. S. Shellard +3 more
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Statistics of peculiar velocities from cosmic strings [PDF]
Monthly Notices of the Royal Astronomical Society, 1995 We calculate the probability distribution of a single component of peculiar velocities due to cosmic strings, smoothed over regions with a radius of several $h^{-1}$ Mpc. The probability distribution is shown to be Gaussian to good accuracy, in agreement with the distribution of peculiar velocities deduced from the 1.9 Jy IRAS redshift survey.
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Extending the velocity-dependent one-scale string evolution model [PDF]
Physical Review D, 2002 We provide a general overview of the velocity-dependent one-scale model for cosmic string evolution and discuss two further extensions to it. We introduce and justify a new ansatz for the momentum parameter $k$, and also incorporate the effect of radiation backreaction.
Martins, C. J. A. P., Shellard, E. P. S.
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Weak-Field Gravity of Revolving Circular Cosmic Strings [PDF]
, 1992 A weak-field solution of Einstein's equations is constructed. It is generated by a circular cosmic string revolving in its plane about the centre of the circle.
A. Einstein +26 more
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Stick–Slip Vibration Characteristics Study of the Drill String Based on PID Controller
Energies, 2023 In order to address the issue of drill string stick–slip vibration, which leads to drill bit wear and reduces the drilling velocity, we conducted a study on the characteristics of stick–slip vibration using a proportional-integral-derivative (PID ...
Baoyong Yan +3 more
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Journal of High Energy Physics, 2020 We compute holographically the energy loss of a moving quark in various states of the D1-D5 CFT. In the dual bulk geometries, the quark is the end of a trailing string, and the profile of this string determines the drag force exerted by the medium on the
Iosif Bena, Alexander Tyukov
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