Interior point methods for semide nite optimization have recently been studied intensively, due to their polynomial complexity and practical e ciency. Many search directions have been proposed to symmetrize the corresponding Newton system. In this paper, we rst introduce a variational principle for de ning the search direction and show that the Nesterov-Todd (NT) direction is optimal under this...

1. By means of a test method, which is described, the presence or absence of the chill-producing principle in antipneumococcus serum may be determined. 2. This principle may be present in normal blood or serum, homologous as well as heterologous, and the measures employed to obtain an antibody solution are not essential factors in its formation. 3. The chill reaction may be mitigated by the adm...

The behavior of atoms in high quantum levels is generally well understood— in principle. For sufficiently large values of the principle quantum number, discrete levels that would exist for an isolated atom, do not. They are said to be dissolved, or quenched by perturbations from surrounding atoms and ions. In practice, the calculation of relevant atomic properties can become quite involved, esp...

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Hemophilia A and B are the most common of the severe bleeding disorders. The present article focuses on the practical aspects of the management of neonates and children diagnosed with hemophilia, and is based on questions frequently posed to paediatric hematologists. It highlights the importance of early diagnosis, the principle of early intervention and the role of comprehensive care hemophili...

In the general context of complex data processing, this paper reviews a recent practical approach to the continuous wavelet formalism on the sphere. This formalism notably yields a correspondence principle which relates wavelets on the plane and on the sphere. Two fast algorithms are also presented for the analysis of signals on the sphere with steerable wavelets.

In this study we first propose and compare two frequencydomain motion estimation methods using phase correlation principle. Then, we focus on the particular case of subpixel translational movements, we evaluate the accuracy of these two registration methods and we give some practical hints for their implementation. Finally, we compare the performances of these methods for both an ideal theoreti...