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  2. Log rotation - Wikipedia

    en.wikipedia.org/wiki/Log_rotation

    Typically, a new logfile is created periodically, and the old logfile is renamed by appending a "1" to the name. Each time a new log file is started, the numbers in the file names of old logfiles are increased by one, so the files "rotate" through the numbers (thus the name "log rotation").

  3. Cycloramic - Wikipedia

    en.wikipedia.org/wiki/Cycloramic

    Cycloramic is an iOS and Windows Phone application that makes the Apple iPhone and Compatible Windows Phones rotate 360 degrees without user intervention. It switches the phone's vibrator at a specific (undisclosed) frequency to make the phone spin around its vertical axis and track the rotation angle using the gyroscope, compass and accelerometer while taking panoramic images.

  4. Wagon-wheel effect - Wikipedia

    en.wikipedia.org/wiki/Wagon-wheel_effect

    At a certain speed the sets of spokes appear to slow and rotate in opposite directions. The wagon-wheel effect (alternatively called stagecoach-wheel effect ) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation.

  5. Tidal locking - Wikipedia

    en.wikipedia.org/wiki/Tidal_locking

    For orbits that do not have an eccentricity close to zero, the rotation rate tends to become locked with the orbital speed when the body is at periapsis, which is the point of strongest tidal interaction between the two objects. If the orbiting object has a companion, this third body can cause the rotation rate of the parent object to vary in ...

  6. Danger Hiptop - Wikipedia

    en.wikipedia.org/wiki/Danger_Hiptop

    Screens on all Sidekick devices (excluding the Slide and 4G models) rotate 180 degrees 'up' to the open position on a patented [specify] hinge pin to reveal the qwerty keyboard. There are two buttons on the left side of the device ("menu" and "jump") and also two on the right ("back" and "cancel").

  7. Rotation matrix - Wikipedia

    en.wikipedia.org/wiki/Rotation_matrix

    The two-dimensional case is the only non-trivial (i.e. not one-dimensional) case where the rotation matrices group is commutative, so that it does not matter in which order multiple rotations are performed. An alternative convention uses rotating axes, [1] and the above matrices also represent a rotation of the axes clockwise through an angle θ.

  8. Optical rotation - Wikipedia

    en.wikipedia.org/wiki/Optical_rotation

    The D- and L- prefixes describe the molecule as a whole, as do the (+) and (−) prefixes for optical rotation. In contrast, the ( R )- and ( S )- prefixes from the Cahn–Ingold–Prelog priority rules characterize the absolute configuration of each specific chiral stereocenter with the molecule, rather than a property of the molecule as a whole.

  9. Circular shift - Wikipedia

    en.wikipedia.org/wiki/Circular_shift

    However, not all n-tuples have n distinct circular shifts. For instance, the 4-tuple ( a , b , a , b ) only has 2 distinct circular shifts. The number of distinct circular shifts of an n -tuple is n k {\displaystyle {\frac {n}{k}}} , where k is a divisor of n , indicating the maximal number of repeats over all subpatterns.