Com o presente trabalho, objetivou-se realizar uma revisão de literatura sobre os principais aspectos relacionados à doença Haff. Enfermidades decorrentes do consumo carne peixe podem ser causadas por substâncias tóxicas, toxinas produzidas pelo próprio peixe, ou microrganismos contidos em água contaminada que peixes se reproduzem, provenientes áreas degradadas, e resíduos locais despejo lixo. ...

The problem of estimating large covariance matrices of multivariate real normal and complex normal distributions is considered when the dimension of the variables is larger than the number of sample size. The Stein-Haff identities and calculus on eigenstructures for singular Wishart matrices are developed for real and complex cases, respectively. By using these techniques, the unbiased risk est...

The estimation problem in multivariate linear calibration with elliptical errors is considered under a loss function which can be derived from the Kullback-Leibler distance. First, we discuss the problem under normal errors and we give unbiased estimate of risk of an alternative estimator by means of the Stein and Stein-Haff identities for multivariate normal distribution. From the unbiased est...

In this paper the problem of estimating the scale matrix in a complex elliptically contoured distribution(complex ECD) is addressed. An extended Haff-Stein identity for this model is derived. It is shown that the minimax estimators of the covariance matrix obtained under the complex normal model remain robust under the complex ECD model when the Stein loss function is employed.