The paper concerns three tests for multivariate normality based on the Shapiro-Wilk W statistic for the principal components of a covariance matrix. Two of them were proposed by Srivastava and Hui (1987), the third was introduced by Hanusz and Tarasińska (2008b). The type I errors of these tests at significance levels 0.1, 0.05 and 0.01 are evaluated both for the sample and residuals in the two...

This paper introduces to the calculus of regular expressions a replace operator and defines a set of replacement expressions that concisely encode alternate variations of the operation. Replace expressions denote regular relations, defined in terms of other regular expression operators. The basic case is unconditional obligatory replacement. We develop several versions of conditional replacemen...

ions that are designed in this way, using a private child package to declare package body data, are not only easier to test but are also more easily extended. Besides their usefulness as a replacement for test points, hierarchical library units can also improve the testability of a system in other ways. In particular, there are many operations which are specific to testing that would benefit fr...

This paper describes proposed extensions to the Ada95 programming language to provide support for persistent programming. The extensions support transparent migration of data between a program's address space and a persistent store in a way that preserves both type safety and encapsulation of ADT's.

A truly international gathering EuroTEX conferences are quite different from the TEX Users Group conferences, in that many more participants from Russia and Central Europe participate, and this year was no exception. In all 103 TEX users from 18 different countries (4 from Belgium, 1 from Canada, 7 from the Czech Republic, 2 from France, 17 from Germany, 1 from Hungary, 2 from Lithuania, 18 fro...

In a recent project the Ada language turned out to be not as flexible as we expected it to be. This forced us to model our application in a way that was less elegant, less maintainable and less efficient. In this paper we propose to add a language construct to the language that would enable us to do what we were missing. The extension is based on finite unions with dispatching and can quite eas...

Highlights of Quark Matter 95 are discussed. 1. The View from Mount RHIC This year marked a major milestone in the field of high energy nuclear collisions. Lead beams were successfully accelerated to 160 AGeV at the CERN/SPS and the first data Rapidity y or η Au+Au from AGS to RHIC HIJING1.3