General introduction to DINA

Equivalency of the DINA Model and a Constrained General Diagnostic

This report shows that the deterministic-input noisy-AND (DINA) model is a special case of more general compensatory diagnostic models by means of a reparameterization of the skill space and the design (Q-) matrix of item by skills associations. This reparameterization produces a compensatory model that is equivalent to the (conjunctive) DINA model, and is valid for all types of complex structu...

Introduction to dynamic general equilibrium

This introduces the symposium on dynamic general equilibrium. © 2009 Elsevier Inc. All rights reserved. JEL classification: E10; E20; E30

General Introduction to Compton Scattering

The polarizability of a system defines its response to a quasistatic electromagnetic field. The induced dipole moment of two constituents of opposite charge, q and −q respectively, at a distance ~r is ~ d = q~r = α~ E, with α the electric polarizability and ~ E the electric field. If the force between the constituents is governed by Hooke’s law, the equilibrium is obtained for α = 2q/C where C ...

General introduction to K3 surfaces

Introduction to a general crystallography.

The definition of an extended crystallographic group is given, based on an n-dimensional Euclidean space, carrier of a faithful integral representation of a permutation group of atomic positions. The Euclidean crystallography of normal crystals and the higher-dimensional one applied to incommensurately modulated crystals, intergrowth crystals and quasicrystals are special cases of a general cry...