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  2. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  3. Escalator - Wikipedia

    en.wikipedia.org/wiki/Escalator

    Escalators typically rise at an angle of 30 or 35 degrees from the ground. [25] They move at 0.3–0.9 metres per second (1–3 ft/s), like moving walkways, and may traverse vertical distances in excess of 18 metres (60 ft). Most modern escalators have single-piece aluminum or stainless steel steps that move on a system of tracks in a ...

  4. Elevator algorithm - Wikipedia

    en.wikipedia.org/wiki/Elevator_algorithm

    The elevator algorithm, or SCAN, is a disk-scheduling algorithm to determine the motion of the disk's arm and head in servicing read and write requests.. This algorithm is named after the behavior of a building elevator, where the elevator continues to travel in its current direction (up or down) until empty, stopping only to let individuals off or to pick up new individuals heading in the ...

  5. Peripheral drift illusion - Wikipedia

    en.wikipedia.org/wiki/Peripheral_drift_illusion

    This illusion was first described by Faubert and Herbert (1999), although a similar effect called the "escalator illusion" was reported by Fraser and Wilcox (1979). A variant of the PDI was created by Kitaoka Akiyoshi and Ashida (2003) who took the continuous sawtooth luminance change, and reversed the intermediate greys.

  6. scikit-learn - Wikipedia

    en.wikipedia.org/wiki/Scikit-learn

    scikit-learn (formerly scikits.learn and also known as sklearn) is a free and open-source machine learning library for the Python programming language. [3] It features various classification, regression and clustering algorithms including support-vector machines, random forests, gradient boosting, k-means and DBSCAN, and is designed to interoperate with the Python numerical and scientific ...

  7. What Is the Relationship Escalator? (And Do You Need to Get ...

    www.aol.com/lifestyle/relationship-escalator-tf...

    The relationship escalator, coined by Amy Gahran, describes the traditional order of steps a relationship is expected to take, from monogamy to marriage.

  8. Passengers per hour per direction - Wikipedia

    en.wikipedia.org/wiki/Passengers_per_hour_per...

    Three parallel escalators; the direction of the middle escalator can be changed to double capacity in one direction (↑↑↓ or ↑↓↓). Many public transport systems handle a high directional flow of passengers— often traveling to work in a city in the morning rush hour and away from the said city in the late afternoon. To increase the ...

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