Simulation is defined to be a technique to imitate the evolution of a real system by studying a model of the system (Winston, 1994, p. 23; Ripley, 1987, p. 2). The model is an abstraction, a simplified and convenient mathematical representation of the actual system typically coded and run as a computer program. If the model has a stochastic1 element, then we have stochastic simulation. The term...

To gain insight into a possible role for antibody-dependent cell-mediated cytotoxicity in vivo, we examined the ability of leukocytes from 28 patients with primary immunodeficiency and from 20 normal controls to lyse three different types of antibody-coated targets in vitro. Mean cytotoxic indices +/-1 SD elicited by unfractionated mononuclear cells from normal controls were 28.74+/-13.26 for h...

RESUME In this paper, two different methods for fractional vegetation cover (FVC) retrieval from CHRIS (Compact High Resolution Imaging Spectrometer) data based on vegetation indices have been analyzed. The first method uses NDVI (Normalized Difference Vegetation Index) values, as suggested, among others, by Carlson and Ripley (1997) and Gutman and Ignatov (1998), and the second method uses VAR...

Human red cells sensitized with one of the Rh antisera (Ripley) form rosettes (Fc-rosette) with human B lymphocytes and the rosettes are well inhibited by aggregated human IgG. As synovial fluids from patients with rheumatoid arthritis are usually hypocomplementaemic and frequently contain immune complexes, they were used for the inhibition of Fc-rosette formations in this study. The Fc-rosette...

The \evidence" procedure for setting hyperparameters is essentially the same as the techniques of ML-II and generalized maximum likelihood. Unlike those older techniques however, the evidence procedure has been justiied (and used) as an approximation to the hierarchical Bayesian calculation. We use several examples to explore the validity of this justiication. Then we derive upper and (often la...

This paper provides a unified solution to two puzzles involving vagueness and scalar adjectives of the absolute lexical class (ex. bald, empty, straight etc.). The first puzzle concerns the proper analysis of the relationship between contextual effects associated with absolute adjectives and those associated with relative adjectives like tall, long or expensive. The dominant view in philosophy ...

The \evidence" procedure for setting hyperparameters is essentially the same as the techniques of ML-II and generalized maximumlikelihood. Unlike those older techniques however, the evidence procedure has been justiied (and used) as an approximation to the hierarchical Bayesian calculation. We use several examples to explore the validity of this justiication. Then we derive upper and (often lar...

Anterior ST segment depression during acute inferior myocardial infarction: evidence for the reciprocal change theory. Am Heart J 1983;106:516–520. 24. Shah PK, Pichler M, Berman DS, Maddahi J, Peter T, Singh BN, Swan HJC. Noninvasive identification of a high risk subset of patients with acute inferior myocardial infarction. Am J Cardiol 1980;46:915–921. 25. Tzivoni D, Chenzbraun A, Keren A, Be...

We discuss four distinct semantic consequence relations which are based on Strong Kleene theories of truth and which generalize the notion of classical consequence to 3-valued logics. Then we set up a uniform signed tableau calculus (the strict-tolerant calculus) which we show to be sound and complete with respect to each of the four semantic consequence relations. The signs employed by our cal...