Mr. J. L. Baker

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Reply from C. L. Witham and S. N. Baker

We thank Drs Schouten and Campfens for their interest in our paper. We are more optimistic about the practical capabilities of directed coherence than the position they adopt in their letter, but we would also emphasise the need for caution in using these methods. At the basis of directed coherence (Granger causality) methods is an autoregressive model of the signals of interest. For the bivari...

P . j 4 . L .

In the history of the Rice Dramatic Club, there have been occasions when it has fallen in the power of the or ganization to produce outstanding modern dramas by contemporary playwrights—plays rich in enter ta inment quality, subtle in humor ; plays which live in the minds of the a u dience long af ter the final curtain falls. Such plays as "The Roynl Family," "Hay Fever ," and "Hell Bent for He...

I T L:  J

We discuss a family of modal logics for reasoning about relational structures of intervals over (usually) linear orders, with modal operators associated with the various binary relations between such intervals, known as Allen’s interval relations. The formulae of these logics are evaluated at intervals rather than points and the main effect of that semantic feature is substantially higher expre...

Ovid J . L . Tzeng , Daisy

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