Results 261 to 270 of about 131,967 (276)

COSMIC STRINGS AND ROTATION VELOCITY OF SPIRAL GALAXIES

Modern Physics Letters A, 1986
Accretion of collisionless particles onto cosmic strings leads to the formation of galactic halos. The halo density is determined uniquely by the string-line density µ as ρ(r)=µr−2 where (size of string loop) <r<(Gµ)1/2 (horizon size). The rotation velocity of galactic spirals in such halos is given by υrot=(4Gµ)1/2, which requires a value of µ ...
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Torsion on Phenomenal Velocity Strings by String Theory Strings

This rough manuscript includes useful methods for solving 5D torsion dynamics in a novel way.
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Dynamics Stability of a Translating String With a Sinusoidally Varying Velocity

Volume 8: Dynamic Systems and Control, Parts A and B, 2010
A new parametric instability phenomenon characterized by infinitely compressed, shock-like waves with a bounded displacement and an unbounded vibratory energy is discovered in a translating string with a constant length and tension and a sinusoidally varying velocity. A novel method based on the wave solutions and the fixed point theory is developed to
W. D. Zhu, X. K. Song, N. A. Zheng
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Tennis racket stiffness, string tension and impact velocity effects on post-impact ball angular velocity

Sports Engineering, 2007
There has been significant technological advancement in the game of tennis over the past two decades. In particular, tennis rackets have changed in size, shape and material composition. The effects of these changes on ball rebound speed have been well documented, but few studies have considered the effects on ball angular velocity.
R. Bower, P. Sinclair
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Using Coiled Tubing Equipment to Run Complex Jointed Tubing Velocity Strings

SPE/ICoTA Coiled Tubing Conference and Exhibition, 2005
Abstract The cost of remedial work on marginal gas wells suffering from water unloading problems can be prohibitive, especially in an offshore environment. The expected financial return often does not justify the rig costs associated with pulling and running a new completion, while the formation damage caused by many well-killing methods
Joel Rignol, Edward Hogan, Hendrik Den Besten, Jean-Marc Krepa   +3 more
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Peculiar velocities from cosmic strings

Physical Review D, 1987
, Brandenberger, , Kaiser, , Shellard, , Turok   +3 more
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Detailed string stability analysis for bi-directional optimal velocity model

Journal of Central South University, 2015
The class of bi-directional optimal velocity models can describe the bi-directional looking effect that usually exists in the reality and is even enhanced with the development of the connected vehicle technologies. Its combined string stability condition can be obtained through the method of the ring-road based string stability analysis.
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Installation of Velocity Strings (VS) Without Loading-Killing the Well

SPE/ICoTA Coiled Tubing & Well Intervention Conference and Exhibition, 2011
Abstract Installation of a small diameter velocity string (VS) is often necessary in tight gas wells to resolve liquid loading problems. Coiled Tubing (CT) is commonly used as a velocity string conduit due to safe live-well installations and speed.
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Opremanje bušotina nizom za ubrzavanje protjecanja (velocity string)

2005
Prisutnost tekućih faza (vode iz formacije i/ili kondenzata) u plinskim bušotinama može smanjiti proizvodnju. Prisutnost ovih tekućina u sustavu protjecanja ima značajan utjecaj na karakteristike protjecanja i one bi trebale biti iznošene da bi se spriječilo akumuliranje tekuće faze unutar kanala bušotine.
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Estimation of Leader Velocity During Insulator String Flashover Process

2023 International Symposium on Lightning Protection (XVII SIPDA), 2023
Xiaobing Xiao, Lei Jia, Xiaomeng He, Ruihan Qi, Yue Li, Gang Liu, Lu Qu, Xiangen Zhao, Yaping Du   +8 more
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