(construction) A theory describing the behaviour of a beam, plate, or shell consisting of three layers: two facesheets and one core.

(US politics, historical) An element of U.S. President Richard Nixon's foreign policy, by which Nixon was portrayed as irrational and volatile toward leaders of hostile Communist nations, with the aim of making them fearful of provoking the United States.

(neurology, mathematics) The use of mathematical models to calculate the electric current and accompanying voltage along passive neurites, particularly the dendrites that receive synaptic inputs at different sites and times.

(film) The view of film as an art form with an original and personal stylistic vision, especially in contrast to collective authorship in the studio system.

(cognitive science, psychology) A theory of categorization in cognitive science, particularly in psychology and cognitive linguistics.

An informal metaphor for chronic illness or disability that uses "spoons" to represent the finite units of physical and mental energy that a person has available for daily tasks.

A line of eclectic social science theories and research with its roots in a Soviet theory pioneered by Sergei Rubinstein in the 1930s, seeking to understand human activities as systemic and socially situated phenomena and to go beyond paradigms of reflexology and classical conditioning.

(political science, sociology) Any theory that centres its gaze, analysis, and interpretation around human action. E.g. rational choice theory, phenomenology, etc.

(linguistics) A particular approach to the architecture of the language organ, based on the principle that the syntactic relation 'X complement of Y' is identical to an inverse-order morphological relation 'X specifier of Y'.

(physics) A proposed mechanism, involving a rotating, convecting, and electrically conducting fluid, by which a celestial body generates and maintains a magnetic field over astronomical time scales.