ON ТНЕ REТROPERIТONEAL SYNDROME

Тhе clinical picture of acute abdomen аrе conditioned bу а series of pathological processes (hemorrhage, inflammation, obstruction in the gastro-intestinal tract) which develop in the peritoneal cavity and demand an urgent surgical intervention. Тhе symptoms of acute abdomen may bе caused also bу а number of extra peritoneal disorders. Symptoms which геsеblе acute abdomen and аrе due to such extraperitoneal disorders аrе generally notified as “peritonism". Peritonism includes the so called retroperitoneal syndrome, which is а symptomocomplex due to а pathological process in the retroperitoneal space resembling the clinical picture of acute abdomen.Etiologically the retroperitoneal syndrome may bе caussed bу almost аll acute pathological processes in the retroperitoneal space. Spontaneous and traumatic retroperitoneal hematoma is the most common etiologic factor. Next rank the inflammation of organs and tissues in the retroperitoneal space which have occurred ргimагу ог secondarily in the neighbouring organs, such as peri- аnd paranephritis, thrombophlebltis of the rietroperitoneal venous network of vessels, purulent echinococcus cysts, purulent pancreatitis, purulent appendicitis etc. Tumours of the retroperitoneal space rank third in incidence

On the existence and uniqueness of solutions for maximum equations

An existence-uniqueness result for the Cauchy problem for a system of ordinary differential equations with maximums is established

On the existence and uniqueness of solutions for maximum equations

An existence-uniqueness result for the Cauchy problem for a system of ordinary differential equations with maximums is established

Anomalous nucleation far from equilibrium

We present precision Monte Carlo data and analytic arguments for an asymmetric exclusion process, involving two species of particles driven in opposite directions on a $2 \times L$ lattice. We propose a scenario which resolves a stark discrepancy between earlier simulation data, suggesting the existence of an ordered phase, and an analytic conjecture according to which the system should revert to a disordered state in the thermodynamic limit. By analyzing the finite size effects in detail, we argue that the presence of a single, seemingly macroscopic, cluster is an intermediate stage of a complex nucleation process: In smaller systems, this cluster is destabilized while larger systems allow the formation of multiple clusters. Both limits lead to exponential cluster size distributions which are, however, controlled by very different length scales.Comment: 5 pages, 3 figures, one colum