We investigate the behaviour of short-range order (SRO) parameters with temperature and system size in several versions of the Ising model, namely the pure and dilute models, the impure case where a fraction of spins are maintained fixed at one of the two possible states, and a driven-diffusive (non-equilibrium) lattice gas. The behaviour shown by SRO parameters is interesting, and reveals itse...

Indigo carmine has been used for eight decades with few adverse effects. Several of our patients, however, experienced severe hypotensive episodes after indigo carmine administration within a period of one month. Analysis of the raw materials used to formulate the preparation of indigo carmine we used showed that they contained impurities. Following recall of these impure materials, none of our...

A simple modification to Fielding and Brunström's method for the estimation of ferri-oxamine is described for use with jaundiced urine. Manufactured ferrioxamine HC1 may be slightly impure, and when used for standard purposes should be rendered anhydrous and checked for iron content. Standard ferrioxamine solutions suitable for calibrating Fielding and Brunström's method may be prepared by addi...

Twirl operations, which convert impure singlet states into Werner states, play an important role in many schemes for entanglement purification. In this paper we describe strategies for implementing twirl operations, with an emphasis on methods suitable for ensemble quantum information processors such as nuclear magnetic resonance (NMR) quantum computers. We implement our twirl operation on a ge...

These lines from the Dhammapada(Babbitt, 1936) reflect the basic dichotomy in Abhidhamma, the classical Buddhist psychology, between pure (wholesome' or healthy) and impure ('unwholesome' or unhealthy) properties. In this system the factors which compose one's mental states from moment to moment determine one's mental health." The list of healthy factors represents a transpersonal model for men...

In previous work, we have developed a principled way of learning the causal structure of linear latent variable models (Silva et al., 2006). However, we have considered the case for models with pure measures only. Pure measures are observed variables that measure no more than one latent variable. This paper presents theoretical extensions that justify the selection of some types of impure measu...