Fine-needle aspiration biopsy of alveolar rhabdomyosarcoma of Stensen's duct: a case report and review of the literature.

The cytologic features of an alveolar rhabdomyosarcoma arising within Stensen's duct of the parotid gland are described. These malignancies and sarcomas in general are not usually included in the differential diagnosis of a parotid lesion as they rarely present as primary parotid malignancies. In addition, these neoplasms are even rarer outside of the pediatric and adolescent populations. Due to the difficulty of this diagnosis, we present this case to increase awareness of the diagnosis in the salivary glands and to highlight the cytomorphologic features that can aid in the correct diagnosis.

Nonlinear optics in a birefringent optical fiber.

We extend the perturbation theory of the nonlinear Schrödinger equation for the study of perturbed (nonintegrable) forms of the vector equation. We derive a set of linear equations that describe the radiation field shed by the soliton as it propagates down a birefringent optical fiber. The formalism is applied to the case when strong birefringence and higher-order dispersion are present in the fiber and to the study of polarization mode dispersion. Finally we discuss an analytical treatment of the mechanism that generates the soliton shadow.

Pointwise dimensions of the lorenz attractor.

We discuss a connection between two complementary views of the Lorenz attractor: the first is the accepted view where the attractor has a smooth measure on a fractal support. This complex system is alternatively manifest as a self-similar curve for the pointwise dimension alpha. We describe why the latter approach is accessible for the analysis of an experimental signal.

Solitons in fibers with polarization mode dispersion.

Evaluating the relative time displacement of the two orthogonally polarized components of a pulse propagating down a birefringent optical fiber is considered. A method that provides analytical expressions for this time displacement is described and generalizes analytical results already published.