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Optimal antenna currents

Antenna current optimization offers performance bounds and suggestions for the distribution of the desired antenna currents. Many current optimization problems can be formulated as convex optimization problems that are solved efficiently with explicit error bounds. The formulations as convex optimization problems are also illuminating as they can easily be generalized to specific antenna problems

Surface Characterization and Reactivity in Ammoxidation Reactions of Vanadium Antimonate Catalysts

Unsupported vanadium antimonate catalysts with Sb/V ratios of 1 and 5 and samples with the latter ratio supported on alumina were studied in toluene and propane ammoxidation to benzonitrile and acrylonitrile, respectively, and were characterized by X-ray photoelectron spectroscopy (XPS) analysis before and after catalytic tests. Activity data for toluene ammoxidation suggest that excess antimony w

Salvador

Short essay on Salvador (1985)

Working conditions and musculoskeletal disorders in professional ballet dancers in Sweden

Popular Abstract in Swedish Professionella balettdansare börjar vanligtvis dansa balett redan vid 8–10 års ålder; pojkar ett par år senare än flickor. Det finns flera utbildningsvägar både i Sverige och utomlands. De flesta börjar sin yrkeskarriär vid 18–20 års ålder. I Sverige är pensionsåldern för institutionsdansare 41–44 år, då man efter 20 års anställning vid svenska institutioner kan få maxiBallet dancers have been shown to have frequent problems with the musculoskeletal system, but little is generally known about the prevalences of musculoskeletal disorders and about working conditions of professional ballet dancers in Sweden. The aims of the thesis were: to analyse the prevalence, location and recurrence of self-reported musculoskeletal disorders (pain) in professional ballet danc

2.8. Structural changes in Collembola populations following replanting of birch forest with spruce in North Norway.

The purpose of the present study was to demonstrate possible effects on Collembola populations by changes in tree composition in natural birch forest in coastal North Norway. In the study area (Dønnes, Nordland County) parts of the natural mixed birch forest has been replanted with Norway spruce and Sitka spruce. Soil samples were collected in June and October 2004. A total of 52 species of Colle