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In linguistics, focus (abbreviated FOC) is a grammatical category that conveys which part of the sentence contributes new, non-derivable, or contrastive information. In the English sentence "Mary only insulted BILL", focus is expressed prosodically by a pitch accent on "Bill" which identifies him as the only person whom Mary insulted.
Conversely, a point source of light placed at the focal point is converted into a collimated beam by the lens. These two cases are examples of image formation in lenses. In the former case, an object at an infinite distance (as represented by a collimated beam of waves) is focused to an image at the focal point of the lens.
In expository writing, a topic sentence is a sentence that summarizes the main idea of a paragraph. [1] [2] It is usually the first sentence in a paragraph. Also known as a topic sentence should encapsulate or organize a entire paragraph. Although topic sentences may appear anywhere in a paragraph, in academic essays they often appear at the ...
Focal point may refer to: Focus (optics) Focus (geometry) Conjugate points, also called focal points; Focal point (game theory) Unicom Focal Point, a portfolio management software tool; Focal point review, a human resources process for employee evaluation; Focal Point, a 1976 studio album by McCoy Tyner "Focal Point: Mark of the Leaf", a Naruto ...
In game theory, a focal point (or Schelling point) is a solution that people tend to choose by default in the absence of communication in order to avoid coordination failure. [1] The concept was introduced by the American economist Thomas Schelling in his book The Strategy of Conflict (1960). [ 2 ]
Syntax was recognized as the focal point of language production, in which a finite set of rules can produce an infinite number of sentences. Subsequently, morphology (i.e. the study of structure and formation of words) and phonology (i.e. the study of organization of sounds in languages) were relegated in importance.
A prime focus telescope design. The observer/camera is at the focal point (shown as a red X). In a prime focus design no secondary optics are used, the image is accessed at the focal point of the primary mirror. At the focal point is some type of structure for holding a film plate or electronic detector.
In semiotics, linguistics, sociology and anthropology, context refers to those objects or entities which surround a focal event, in these disciplines typically a communicative event, of some kind. Context is "a frame that surrounds the event and provides resources for its appropriate interpretation".