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  2. Messier 92 - Wikipedia

    en.wikipedia.org/wiki/Messier_92

    It is one of the brighter of its sort in apparent magnitude in the northern hemisphere and in its absolute magnitude in the galaxy, but it is often overlooked by amateur astronomers due to angular proximity to bright cluster Messier 13, about 20% closer. Though when compared to M13, M92 is only slightly less bright, but about 1/3 less extended.

  3. Multiple integral - Wikipedia

    en.wikipedia.org/wiki/Multiple_integral

    In electromagnetism, Maxwell's equations can be written using multiple integrals to calculate the total magnetic and electric fields. [12] In the following example, the electric field produced by a distribution of charges given by the volume charge density ρ( r →) is obtained by a triple integral of a vector function:

  4. Head direction cell - Wikipedia

    en.wikipedia.org/wiki/Head_direction_cell

    It is thought that the cortical head direction cells process information about the environment, while the subcortical ones process information about angular head movements. [ 15 ] A striking characteristic of HD cells is that in most brain regions they maintain the same relative preferred firing directions, even if the animal is moved to a ...

  5. Angular diameter - Wikipedia

    en.wikipedia.org/wiki/Angular_diameter

    The angular diameter, angular size, apparent diameter, or apparent size is an angular separation (in units of angle) describing how large a sphere or circle appears from a given point of view. In the vision sciences , it is called the visual angle , and in optics , it is the angular aperture (of a lens ).

  6. History of Solar System formation and evolution hypotheses

    en.wikipedia.org/wiki/History_of_Solar_System...

    The magnetic field was around 1/100,000 gauss. During the collapse, the magnetic lines of force were twisted. The collapse was fast and occurred due to the dissociation of hydrogen molecules, followed by the ionization of hydrogen and the double ionization of helium. Angular momentum led to rotational instability, which produced a Laplacean disk.

  7. Great Unconformity - Wikipedia

    en.wikipedia.org/wiki/Great_Unconformity

    At the base of the Grand Canyon Supergroup, where it truncates the Bass Formation, the period of time represented by this angular unconformity increases to about 725 million years. Where the Tonto Group overlies the Vishnu Basement Rocks, the Great Unconformity represents a period as much as 1.2 to 1.6 billion years.

  8. Sorting algorithm - Wikipedia

    en.wikipedia.org/wiki/Sorting_algorithm

    Radix sort is an algorithm that sorts numbers by processing individual digits. n numbers consisting of k digits each are sorted in O(n · k) time. Radix sort can process digits of each number either starting from the least significant digit (LSD) or starting from the most significant digit (MSD). The LSD algorithm first sorts the list by the ...

  9. Jaynes–Cummings model - Wikipedia

    en.wikipedia.org/wiki/Jaynes–Cummings_model

    [24] [25] [26] The coupling of a single quantum field mode with multiple (>) two-state subsystems (equivalent to spins higher than 1/2) is known as the Dicke model or the Tavis–Cummings model. For example, it applies to a high quality resonant cavity containing multiple identical atoms with transitions near the cavity resonance, or a ...