The psychological status of fifteen morbidly obese patients was assessed prior to gastroplastic surgery for the purpose of weight reduction study. The patients, averaging 264% of their ideal weight, were predominantly in the lowest socioeconomic class. This sample may represent a subset of the morbidly obese who have a high degree of psychopathology, the most common manifestation of which is affective illness. The prevalence of lifetime depressive disorders in these patients was 53%, utilizing the diagnostic criteria of the DSM‐III. Only one patient had no diagnosable mental illness. The sex, percentage of ideal weight, and socioeconomic class of the patients may influence these findings.
Traditionally pump intake hydraulics have been investigated using scale physical hydraulic models. Computational fluid dynamics (CFD) is a rapidly improving technology that in some cases can be used as a cost or time effective alternative to traditional physical model methods for evaluation of pump intake hydraulics. This paper presents a case study on the use of CFD modeling to re-evaluate and modify the design of a large wastewater treatment plant influent pump station. The pump station has two a self cleaning trench wet wells, which was physically modeled early in the design process. Changes were made to the pump station layout and capacity during subsequent facility design. A CFD model was used to refine the design of the wet wells and evaluate the effects of upstream sewer alignment on the pump hydraulics. This paper presents the results of the CFD model analysis and design refinement.
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