To ensure continued yields, crops of young pines are raised rotationally to replace those felled.
Around us are mementos of past triumphs: small-scale models of a park in the Abu Dhabi desert or a university "learning hub" in Singapore, prototypes of less serious experiments, like his "rotationally symmetrical" chair, in which you can sit at absurd angles.
A similar torque-to-thrust conversion can be obtained by either rotating an axially fixed screw to drive a rotationally fixed nut along the screw or by rotating an axially fixed nut to drive a rotationally fixed screw through the nut.
And whereas jellyfish are radially symmetrical, like a flower, ctenophores are rotationally symmetrical, like a yin-yang symbol; their halves only match if you turn one a hundred and eighty degrees.
He lay down in the bed and studied the "part lines" and "sink marks" and the overall texture of the battleship-gray polyethylene, which was "rotationally molded," an old process that has gained in popularity because it is cheaper than other methods of molding plastic.
When consumers break the nutrient cycle to eat animals, nutrients leave the system of rotationally grazed plots of land (though of course this happens with plant-based systems as well).
"We will soon see up to four LCS here in Singapore as we rotationally deploy Seventh Fleet ships," said Rear Admiral Charles Williams.
Can a rotationally symmetrical form make a comfortable chair?
The land is grazed rotationally by sheep, cattle and ponies to ensure it is not poached.
"We envision four ships here by May 2017 to sometime in 2018... but I think what you have is that by 2018, four LCS ships will be rotationally deployed here to Singapore".
When the force reaches a critical value, the symmetric equilibrium configuration becomes unstable and an infinite number of equivalent lowest energy stable states appear, which are no longer rotationally symmetric but are related to each other by a rotation.
