That strategy has the effect of doubling the strength of the electric field between the eel's positive pole (which is located near the head) and its negative pole (which is located near the tail).
To match the American machine, however, the Europeans, with a much smaller tunnel — 17 miles instead of 54 —had to adopt a riskier design, in particular by doubling the strength of their magnets.
Mr. Karzai said that if he was re-elected, his priority would be bringing peace and security to the country; he promised to double the strength of the Afghan police and army forces by the end of his second elected term.
Midair collisions of sand particles can double the strength of a sandstorm, according to new computer simulations.
Including midair collisions in the model increased the flux, in extreme cases approximately doubling the strength of the storm, they report online this month in Physical Review Letters.
It was concluded that placing the openings near the upper corners of the deep beam may double the strength, and the use of a rectangular narrow opening, with the long sides in the horizontal save up to 40%% of structural strength of the deep beam.
Between 2012 and last year, it underwent a $94 million upgrade to double the strength of the its main magnetic field and add a second port to inject neutral atoms to heat the plasma, which can reach temperatures above 15,000,000°C, hotter than the sun.
However, the Imperial reaction to these attacks was to double the strength of their forces.
The Second Regiment of the First Imperial Guards had entered the palace grounds, doubling the strength of the battalion already stationed there, presumably to provide extra protection against Hatanaka's rebellion.
