2,054 research outputs found
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
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 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
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