Association schemes are combinatorial objects that allow us solve problems in several branches of mathematics. They have been used in the study of permutation groups and graphs and also in the design of experiments, coding theory, partition designs etc. In this paper we show some techniques for computing properties of association schemes. The main framework arises from the fact that we can char...

SIR,-We read with interest the paper of Dr. P. Kramer and others (6 May, p. 320) and while we agree that the decrease in efficiency with re-use may be the result of "blood deposits on the membrane surface inhibiting exchange," we feel there are two points which must be made. Firstly, the aurhors say that of the dialysers studied, the Ab-Gambro dialyser had the greatest blood loss due to "blood ...

In this paper, we derive a capacity region for Gaussian fading multiple access degraded relay channel with partial channel state information (CSI) at the transmitters (CSIT) and perfect CSI at the receiver (CSIR). The achievable rate region obtained by Kramer-Wijngaarden is a special case of our region. Keywords-Gaussian fading channel; channel state information (CSI); discrete multiple access ...

X iv :a st ro -p h/ 05 05 55 5v 1 2 7 M ay 2 00 5 Pulsars as Tools for Fundamental Physics & Astrophysics J. M. Cordes, M. Kramer, T. J. W. Lazio , B. W. Stappers, D. C. Backer, S. Johnston Department of Astronomy and NAIC, Cornell University, Ithaca, NY USA University of Manchester, Jodrell Bank Observatory, Jodrell Bank, UK Naval Research Laboratory, Remote Sensing Division, Washington, DC US...

The relationship between economic conditions and voting behavior is evaluated in the context of U.S. presidential elections, 1916-1984. The approach represents a reapplication of the model employed by Gerald Kramer (1971) in an earlier study of congressional elections. A critique of the Kramer model by George Stigler (1973) is reconsidered in this different context, with application of a Chow t...

Objetivo: analisar a teoria do Cuidado Humano de Jean Watson, partir modelo reflexão crítica proposto por Chinn e Kramer. Método: estudo teórico-reflexivo, realizado em abril 2021, elaborado Kramer, com ênfase nos seguintes componentes: clareza, simplicidade, generalidade, acessibilidade importância da teoria. Resultados: análise proposto, observou-se que Watson apresenta relativa clareza semân...