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Physics

زبان محتوا

پشتیبانی: CRM@email.irandoc.ac.ir

Concept information

Physics entity > Physics real entity > Physics property > Constitutive property > Constitutive proportionality

اصطلاح مرجح

Constitutive proportionality  

نوع

  • http://www.irandoc.ac.ir/onto/irandoc-meta/Concept

مفهوم اعم

مفهوم‌های اخص

منسوخ

  • false

نظر

  • A constitutive property that is a proportionality between values of dynamical property players.

بحث

  • Constitutive proportionalities apply only to those constitutive dependencies that can be expressed by which the dependent property is proportional to the independent property. Any other algebraic form of the dependency may have specifially-defined parameters (e.g., offsets, rate parameters). Given the creativity and license of modelers for creating the best fit to constitutive dependencies, the parameters of such non-proportional dependencies must be annotated by some local mechanism that does not depend on OPB classifications. Constitutive proportionalities are approximations to dependencies for which a first-order, linear approximation is sufficient for the purposes of analysis. Piecewise linear approximations may apply over a limited range of dynamical property values. In general, various algebraic functions may be required using one or more parameters to fit observed dependency relationships. Given the range of possible constitutive dependencies, OPB defers representing such possibilities on a case-by-case basis for specific use-cases. Non-proportionality constants include coefficients and parameters required to characterize linear and nonlinear dependencies that are not simple proportionalities. Some may constitutive dependencies may include dynamic modeling schemes with internal dynamic states (e.g., the gating variable of Hodgkin-Huxley ion gating equations). We will treat such properties as internal to the constitutive dependency, shielded from other entities in the system and known solely as hypothetical constructs derived as constitutively observed dynamic phenomena. Thus, HH gating variables will be classified as properties of constitutive dependencies which are also subclasses of Dynamical property without, however, declaring a Dynamical entity of which it is a property. Important to realize that MM params, HH params, etc. are all derived and asserted by virtue of curve-fits to the directly observed attributes of a system; number of gating particles and their respective states is entirely inferential by best fits and, so, are no more physically real than any other coefficient or parameter.
  • i.e., having a linear relationship that intersects the origin; a characteristic of ideal dynamical elements By rights, a conductance (or its inverse, resistance) is a constitutive property of an electrochemical flow process (see: OPB:Electrical conductance). However, we classify ionic conductances as dynamical amounts because they are, ultimately, determined by the aggregates of the molecular conformational states of the ionic channels mediating the electropotential ion transport. Thus, these classes are suitable for representing the conductance ion channels at a moment in time, as well as the conductance of ion channel as characterized for standard conditions and by which the channel is named (e.g., 250 pS Ca-dependent K-channel)

برچسب

  • Constitutive proportionality

پیشوند آی‌آرآی

  • OPB:OPB_00055

مترادف

  • ideal property

در زبان های دیگر

URI

http://www.irandoc.acir/onto/irandoc/OPB_00055

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