Soliton perturbation theory is used to determine the evolution of a solitary wave described by a perturbed nonlinear Schrödinger equation. Perturbation terms, which model wide classes of physically relevant perturbations, are considered. An analytical solution is found for the first-order correction of the evolving solitary wave. This solution for the solitary wave tail is in integral form and ...

Solitary fibrous tumors are well described in the pleura, but rare extra-pleural neoplasms have been reported. We describe a patient with a solitary left renal fibrous tumor who after undergoing a nephrectomy, presented 8 years later with a contralateral metachronous solitary fibrous tumor. Malignant metastatic extra-pleural solitary fibrous tumors are extremely rare, and to our knowledge, this...

Many mammal populations include solitary individuals. These individuals could be solitary for short or long periods and involve more or less spatial separation from conspecifics. A variety of accepted socio-ecology variables such as food availability, predator pressure, and reproductive strategies can account for much solitary behaviour. However, other factors, such as human interference, disea...

Self-action of light is a subject of constant investigation due to the fascinating phenomena encountered and their potential applications to all-optical signal processing devices. Optical solitons, both temporal and spatial, play a central role in such scenario because of their unique particlelike properties. Here we study the spatial case. Until recently, optical solitons and their application...

CONTEXT Solitary fibrous tumor is an uncommon spindle cell tumor which can occur in a variety of locations. Four cases of pancreatic solitary fibrous tumor have been reported in the literature. CASE REPORT We report the fifth case of pancreatic solitary fibrous tumor in a 78-year-old woman who presented with back pain and weight loss. Imaging studies were suggestive of an endocrine tumor. End...

Infantile myofibromatosis (IM) is the most common fibrous tumor of infancy. IM may arise in a solitary or multicentric form, with similar histopathological findings, however, the clinical features and prognoses may vary. The solitary form tends to occur predominantly in males and is typically observed in the dermis, subcutis or deep soft tissues. The reported incidence of solitary osseous myofi...

Background: Clinically solitary thyroid nodule may be defined as a goitre which on clinical examination appears to be a single nodule in an otherwise normal gland. In reality, solitary thyroid nodule is not a single disease process but a constellation of processes encountered in a variety of clinical diseases such as dominant nodule of a multi nodular goitre, true adenoma, malignancy, thyroidit...

In this paper, the family of BBM equation with strong nonlinear dispersive B(m,n) equation is introduced. By using a simple and effective algebraic method ,some abundant exact solutions for this class of BBM equations are gotten and call its solutions with solitary patterns, solitary wave solution with singular point , smooth solitary wave solution , kink solution, antikink solution, floating s...