Let G be a graph admitting a perfect matching. A cycle of even size C is central if G − C has a perfect matching. Given an orientation to G, an even cycle C is oddly oriented if along either direction of traversal around C, the number of edges of C with the direction as the same as the traversal direction is odd. An orientation of G is Pfaffian if every central cycle of G is oddly oriented. A g...

In buildings with triangular plan, the center of mass and rigidity cannot geometrically match all possible directions of the earthquake. This will result in torsional moments in the stories causing the building to rotate around the center of rigidity. In this paper, via response spectrum analysis (RSA) and nonlinear static analysis, the seismic behavior of 5-, 10- and 15-story steel structures ...

A. Smoktunowicz and L. Vendramin conjectured that if A is a finite skew brace with solvable additive group, then the multiplicative group of solvable. In this short note we make step towards positive solution conjecture proving minimal non-solvable not simple. On way to obtaining result, prove correct in case when order divisible by 3.

The plaster-casting method to create a scoliosis brace consists of mould generation and rectification obtain the desired orthosis geometry. Alternative methods entail use 3D scanning CAD/CAM. However, both manual digital design entirely rely on orthotist expertise. Characterisation process is needed ensure that designs are as efficient plaster-cast designs. Three-dimensional scans five patients...

In the recent past, several research studies have highlighted that prescriptions reported in codes for design of structures with concentric braces chevron configuration are often not effective preventing yielding or buckling non-dissipative members and ensuring collapse mechanisms characterised by uniform damage braces. To investigate reasons these deficiencies, this paper seismic response conc...