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High-level and low-level, as technical terms, are used to classify, describe and point to specific goals of a systematic operation; and are applied in a wide range of contexts, such as, for instance, in domains as widely varied as computer science and business administration.
In general, to determine appropriate abstraction, one must make many small decisions about scope (domain analysis), determine what other systems one must cooperate with (legacy analysis), then perform a detailed object-oriented analysis which is expressed within project time and budget constraints as an object-oriented design.
In object-oriented design, the dependency inversion principle is a specific methodology for loosely coupled software modules.When following this principle, the conventional dependency relationships established from high-level, policy-setting modules to low-level, dependency modules are reversed, thus rendering high-level modules independent of the low-level module implementation details.
Example from MIL-HDBK-881, which illustrates the first three levels of a typical aircraft system [1]. A work-breakdown structure (WBS) [2] in project management and systems engineering is a deliverable-oriented breakdown of a project into smaller components.
Low-level construals are more detail-oriented or subordinate thought processes. For example, one could think about children playing catch in either a high or low level manner. If one were to think about the children's activity at a high level, one might describe this activity as "children having fun".
Loose coupling in broader distributed system design is achieved by the use of transactions, queues provided by message-oriented middleware, and interoperability standards. [2] Four types of autonomy, which promote loose coupling, are: reference autonomy, time autonomy, format autonomy, and platform autonomy. [3]
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The opposite bias, of not attributing feelings or thoughts to another person, is dehumanised perception, [23] a type of objectification. Attentional bias, the tendency of perception to be affected by recurring thoughts. [24] Frequency illusion or Baader–Meinhof phenomenon.