An efficient methodology is proposed to find optimal shape of arch dams on the basis of constrained natural frequencies. The optimization is carried out by virtual sub population (VSP) evolutionary algorithm employing real values of design variables. In order to reduce the computational cost of the optimization process, the arch dam natural frequencies are predicted by properly trained back pro...

We study the effects of bond and site disorder in classical $J_{1}$-$J_{2}$ Heisenberg model on a square lattice order-by-disorder frustrated regime $2J_{2}>\left|J_{1}\right|$. Combining symmetry arguments, numerical energy minimization large scale Monte Carlo simulations, we establish that finite temperature Ising-like transition clean system is destroyed presence any concentration impurities...

Computer simulations show the self-transition between ordered and disordered emulsions in divergent microfluidic channels. The transition is driven by nonlinear competition viscous dissipation surface tension forces as controlled device geometry. An unexpected route back to order observed regime of large opening angles where a trend towards increasing disorder would be intuitively expected.

objective: the study evaluated the efficacy of oral calcium carbonate supplement on leg pain in pregnancy and nursing period. materials and methods: a total number of 176 women at third trimester of pregnancy or nursing period till to one year after delivery with complaint of leg pain, low back pain (lbp), and posterior pelvic pain (ppp) were evaluated for distinct primary causes and were exclu...