Semiclassical thermodynamics of scalar fields

We present a systematic semiclassical procedure to compute the partition function for scalar field theories at finite temperature. The central objects in our scheme are the solutions of the classical equations of motion in imaginary time, with spatially independent boundary conditions. Field fluctuations -- both field deviations around these classical solutions, and fluctuations of the boundary value of the fields -- are resummed in a Gaussian approximation. In our final expression for the partition function, this resummation is reduced to solving certain ordinary differential equations. Moreover, we show that it is renormalizable with the usual 1-loop counterterms.Comment: 24 pages, 5 postscript figure

COMPARISON OF FLOW PATTERNS IN THE RADIOCEPHALIC ARTERIOVENOUS FISTULA THROUG IN VITRO AND IN SILICO STUDY

The vascular accesses to hemodialysis patients usually are through arteriovenous fistula (AVF) or synthetic grafts. The analyses of recirculation zones, stagnation points, secondary flow and low and high shear stress are very important points to study for understand the hemodynamic local in arteriovenous fistula. In this work, it was analyzed through computational fluid dynamics the streamlines in AVF and it was compared with the literature results. The flow patterns were visualized under steady and unsteady condition with Reynolds number ranging from 100 up 600. The results obtained from CFD were very similar with the literature results. The flow becomes more chaotic when the Reynolds number increases. Vortex can be seen in anastomosis region, occupying all transversal section of the artery. Thus, the results obtained using CFD look like the results obtained experimentally

Assessing the Quality of Shellfish Harvesting Areas: The Case of the Oualidia and Sidi Moussa Lagoons in Morocco

Based on European regulation 91/492/EC, Morocco, very early on, established legislation with conditions for producing and marketing live bivalve mollusks. In applying this legislation, the National Institute of Fisheries Research (INRH)[1]  has set up a system for sanitary monitoring of the marine environment, through which several harvesting areas have been classified while others are in progress. In January 2020, the Oualidia and Sidi Moussa lagoons were categorized respectively in classes B and C, with 52.77% of the results falling between 230 and 4600 MPN E. coli/100 g of flesh and intravalvular liquid (FIL) and 11.11% of the results falling between 4600 and 46000 MPN E. coli/100 g FIL. Sidi Moussa Lagoon has been classified as a category C since 2006. Consequently, oyster farming activity has been suspended in this area. This incident serves as a warning sign of the significant weakness of these ecosystems in addressing multiple social and economic challenges. On the other hand, INRH has sufficient data and tools to progress toward better optimization of the marine environment and sanitary monitoring program management.   [1] Institut National de Recherche Halieutique