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  2. Concentric zone model - Wikipedia

    en.wikipedia.org/wiki/Concentric_zone_model

    The model is more detailed than the traditional down-mid-uptown divide by which downtown is the CBD, uptown the affluent residential outer ring, and midtown in between. Bid rent curve. Burgess's work helped generate the bid rent curve. This theory states that the concentric circles are based on the amount that people will pay for the land.

  3. Ring theory (psychology) - Wikipedia

    en.wikipedia.org/wiki/Ring_theory_(psychology)

    The concept, developed by clinical psychologist Susan Silk, advises those surrounding a person in crisis to direct expressions of their own feelings of stress toward those less close to that person and direct only support toward those closer to the person, using a diagram of concentric circles to illustrate the concept.

  4. Bid rent theory - Wikipedia

    en.wikipedia.org/wiki/Bid_rent_theory

    Bid Rent Theory was developed by William Alonso in 1964, it was extended from the Von-thunen Model (1826), who analyzed agricultural land use. The first theoretician of the bid rent effect was David Ricardo. It states that [1] different land users will compete with one another for land close to the city centre.

  5. Concentric objects - Wikipedia

    en.wikipedia.org/wiki/Concentric_objects

    The region of the plane between two concentric circles is an annulus, and analogously the region of space between two concentric spheres is a spherical shell. [6] For a given point c in the plane, the set of all circles having c as their center forms a pencil of circles. Each two circles in the pencil are concentric, and have different radii.

  6. Interpersonal circumplex - Wikipedia

    en.wikipedia.org/wiki/Interpersonal_circumplex

    The circumplex consists of orthogonal dimensions and concentric circles indicating the level of intensity. The interpersonal circle or interpersonal circumplex is a model for conceptualizing, organizing, and assessing interpersonal behavior, traits, and motives.

  7. Aristotle's wheel paradox - Wikipedia

    en.wikipedia.org/wiki/Aristotle's_wheel_paradox

    CSS animation of Aristotle's wheel paradox. The wheel comprises two concentric circles: the outer one has twice the radius of the inner one and rolls on the lower track. Both circles and tracks are marked with segments of equal length. The inner circle is observed to slip with respect to its track.

  8. Concentric spheres - Wikipedia

    en.wikipedia.org/wiki/Concentric_spheres

    The cosmological model of concentric (or homocentric) spheres, developed by Eudoxus, Callippus, and Aristotle, employed celestial spheres all centered on the Earth. [1] [2] In this respect, it differed from the epicyclic and eccentric models with multiple centers, which were used by Ptolemy and other mathematical astronomers until the time of Copernicus.

  9. Sri Yantra - Wikipedia

    en.wikipedia.org/wiki/Sri_Yantra

    The triangles are circumscribed by two concentric circles composed of 8 and 16 petals, representing the lotus of creation and reproductive vital force. The entire configuration is framed by the broken lines of an earth square, representing a temple with four doors open onto the regions of the universe. [3] [4]