In finance, portfolio performance assessment is an important area of research. The two popular indices of performance are the Jensen's alpha and the Sharpe index. However there are a number of shortcomings of the above measures that have been highlighted in the literature. We propose a new measure of performance that seeks to address the limitations of the earlier indices. The Roshe4282-Shoes Roshe Trainers Women Yellow Gray
new index is calculated by employing a well known method in operations research called data envelopment analysis. We show the benefits of the proposed approach and assess the performance of mutual funds. We compare the results with traditional indices of performance. An interesting result we obtain is that the mutual funds are all approximately mean-variance efficient.
Related to the problem of the drag-reduction mechanism due to the elastic properties of macromolecular additives, we study theoretically and experimentally the dynamically behaviour of the molecules and the corresponding flow field. Optical properties, orientation, configuration or change of shape are studied by
flow birefringence in classical or original, elongational flow devices. The dependence of the birefringence threshold on the Nike Free Sale Run 3 Women Wine Red
molecular weight, nature, ionic character, concentration and level of degradation of the polymer is studied. The flow field is determined experimentally and by computation using a simple rheological model. A correlation with drag-reduction measurement in capillaries is tried.