Computer-Aided-Design of Concert Staging

Concert stages contain many complex geometries and structural components, making their design a difficult task.  Equally difficult is the assembly of a concert stage, since proper construction of it's various components is vital to ensure structural integrity.  Computer-Aided-Design (CAD) is a necessary tool in staging design and analysis.  CAD can be used to show the overall structure of the stage, break the stage down into its various constituent components, and show how the individual stage members are connected.  Using solid modeling, the solid representations of the components and individual members assist in visualizing the complex components and their interconnection.  CAD techniques are essential in envisioning how various members of the stage fit together, and to show the step-by-step process of stage construction.  Also, the use of the CAD model is invaluable in any structural analysis.  After translating the CAD model into an IGES file, the structure can be imported into a finite-element program, which can then be used to evaluate the integrity of the stage by examining existing stresses

Κορώνη -- Μοσχάτον

A joint measurement is presented of the branching fractions $B^0_s\to\mu^+\mu^-$ and $B^0\to\mu^+\mu^-$ in proton-proton collisions at the LHC by the CMS and LHCb experiments. The data samples were collected in 2011 at a centre-of-mass energy of 7 TeV, and in 2012 at 8 TeV. The combined analysis produces the first observation of the $B^0_s\to\mu^+\mu^-$ decay, with a statistical significance exceeding six standard deviations, and the best measurement of its branching fraction so far, and three standard deviation evidence for the $B^0\to\mu^+\mu^-$ decay. The measurements are statistically compatible with SM predictions and impose stringent constraints on several theories beyond the SM