Abstract In this paper we consider a coupled KdV system of Boussinesq type and its symmetric version. These systems were previously shown to possess generalized solitary waves consisting of a solitary pulse that decays symmetrically to oscillations of small, constant amplitude. We solve numerically the periodic initial-value problem for these systems using a high order accurate, fully discrete,...

In this paper we consider a coupled KdV system of Boussinesq type and its symmetric version. These systems were previously shown to possess Generalized Solitary Waves consisting of a solitary pulse that decays symmetrically to oscilations of small, constant amplitude. We solve numerically the periodic initial-value problem for these systems using a high order accurate, fully discrete, Galerkin-...

We read with great interest a recently published article by Lecoutere et al [1] entitled “multifocal cytokeratin expression in pleural and abdominal malignant solitary fibrous tumor: an unusual diagnostic pitfall”. Authors showed three histologically and immunohistochemically welldocumented cases of pleural and abdominal malignant solitary fibrous tumor (SFT) with unexpected multifocal expressi...

Solitary fibrous tumors of the pleura are rare and benign primary localized tumors; they possess a malignant potential and thus should be excised. We report a case of a 43-year-old woman, who had suffered for 5 years from right basithoracic pain associated with progressive dyspnea and persistent hiccups during the last 6 months. We have not found any similar case in the literature. Further test...

A 63-year-old woman presented with a complaint of left buttock mass that had rapidly increased in size after a recent trauma. The patient was otherwise asymptomatic, denying any pain or constitutional symptoms. On physical exam, a well-defined, firm, freely mobile 20-cm mass with intact, non-erythematous overlying skin was palpated in the medial-lower quadrant of the left buttock, contiguous to...

We predict the existence of gray (dark) solitary waves in negative-index materials on the basis of a derived higher-order nonlinear Schrödinger equation. The conditions for the formation of three cases of gray solitary waves and exact analytical expressions are presented. Furthermore, we investigate the properties of these gray solitary waves in negative-index materials. The results show that t...

Solitary plasmacytoma (SP), histologically indistinguishable from multiple myeloma (MM), is a kind of malignant tumor characterized by the proliferation of monoclonal plasma cells. SP is an independent subtype of plasmacytoma, including extramedullary plasmacytoma and solitary plasmacytoma of bone (SPB) [1]. Most solitary plasmacytomas progress to MM, and are usually treated in the department o...

We find new analytic solitary-wave solutions, having a nonzero background at infinity, of the coupled Korteweg-De Vries equation, using the auxiliary function method. We study the dynamical properties of the solitary-waves by numerical simulations. It is shown that the solitary-waves can be stable or unstable, depending on the coefficients of the model. We study the interaction dynamics by usin...

Solitary fibrous tumors are spindle-cell neoplasms that usually develop in the pleura and peritoneum, and rarely arise in the stomach. To our knowledge, there is only one case reporting a solitary fibrous tumor arising from stomach in the English literature. Here we report the case of a 26-year-old man with a large solitary fibrous tumor arising from the stomach which involved the submucosa and...