Consistency criteria

The construction of exchange correlation potentials and energies becomes a task for which not much guidance can be obtained from fundamental theory. The form of dependence on the electron density is generally not known and can only to a limited extent be obtained from theoretical considerations. The best one can do is to assume some functional dependence on the density with parameters to satisfy some consistency criteria and to fit calculated results to some model systems for which applications of proper quantum mechanical theory can be used as comparisons. At best this results in some form of ad-hoc semi-empirical method, which may be used with success for simulations of molecular ground state properties, but is certainly not universal. 

In order to determine whether or not an operation is critical or noncritical, a set of consistent criteria must be used as a reference. The Food, Drug and Cosmetic Act makes this clear. 

Schieber JD, Ottinger HCh (1994) On consistency criteria for stress tensors in kinetic theory models. J Rheol 38(6) 1909-1924... 

Substance data from various sources have been included in an effort to make as many substances as possible accessible to at least approximate calculations. In the case of individual substances and groups of substances the aim has been to use the data from one source. It was not possible to meet strict consistency criteria when combining data from various sources to form a data set for a substance. The inaccuracies resulting from this lie in most cases within thermochemically acceptable limits. 

The biological data used to derive and validate QSAR models may have been determined in a standard series of experiments or may have been compiled from a variety of studies. In the latter case, the measurements should have been conducted according to standard protocols and evaluated by consistent criteria. The important test parameters should be identical or comparable throughout any set of data used. If, nonetheless, they vary within the data set, they should be critically evaluated for their effect on the outcome of the biological assays, as such differences may greatly affect the relevance of the derived models. 

Published data on algal toxicity are highly variable because of the diverse test protocols applied and hence are of limited use for the derivation and validation of sound QSAR models. Validated reference data sets are not available for algae (unlike fish) and if data are retrieved from the literature, therefore, care should be taken that they have been conducted according to standard protocols and evaluated by consistent criteria. The important test parameters... 

Frisvad, J.C. and Filtenborg, O. (1990) Secondary metabolites as consistent criteria in Penicillium taxonomy and a synoptic key to Penicillium subgenus Penicillium. In R.A. Samson and J.I. Pitt, (eds.), Modern concepts in Penicillium and Aspergillus classification. Plenum Press, New York, pp. 313-384. 

Any model of an ionic solution must satisfy two categories of self-consistency criteria thermodynamic criteria and electrostatic criteria. 

Internal seclusion (we now have inclusion, exclusion and seclusion), which is a timeout provision, not an LSU, but a short, time-limited removal from class into a well-ordered environment within the school. Internal seclusion should be seen as part of a continuum of support for pupils with behaviour difficulties and should be used within clear and consistent criteria. Monitoring of pupils and staff who use this facility will give an indication not only of pupil difficulties, but also subject and individual teacher issues. This data can then be passed on to department/subjea co-ordinators. 

The basic idea of these theories is to look at the distribution of conformations of a chain molecule attached to the surface. The conformational probability distribution function is written in terms of the non-local interaction field induced by the other chain molecules. This field is anisotropic, i.e., it depends on the direction perpendicular to the surface, because the presence of the surface and the inhomogeneous variation of the density of polymer segments and solvent molecules as a function of the distance from the surface. The non-local mean-field is determined by packing constraints that take into account the fact that the volume (at all distances from the surface) must be filled by polymer segments or solvent molecules. These self-consistent criteria represent the incompressibility assumption at all distances from the surface. 

The GHS is an internationally agreed-upon system, created by the United Nations. It is designed to replace the various classification and labeling standards used in different countries by using consistent criteria for classification and labeling on a global level. 

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