The problem of operating or designing a system with robust stability with respect to many parameters can be viewed as a geometric problem in multidimensional parameter space of finding the position of nominal parameters λ0 relative to hypersurfaces at which stability is lost in a bifurcation. The position of λ0 relative to these hypersurfaces may be quantified by numerically computing the bifur...

This paper continues an investigation into a one-dimensional lattice equation that models the light field in a system comprised of a periodic array of pumped optical cavities with saturable nonlinearity. The additional effects of a spatial gradient of the phase of the pump field are studied, which in the presence of loss terms is shown to break the spatial reversibility of the steady problem. U...

This paper presents a study on dynamics modeling and control system design of a stewart platform using piezoelectric actuators, which has been developed at the Spacecraft Dynamics Control and Navigation Laboratory (SDCNLab), York University for vibration isolation. As an efficient mechanism of six degree-of-freedom (6-DOF), stewart platform is capable of isolating vibration of wide band range, ...

Os dados e narrativas apresentados neste estudo descrevem o quão urgente é compreender os desafios as oportunidades da heterogeneidade do envelhecimento, especialmente numa sociedade ageista que historicamente isola indivíduos mais longevos. Neste artigo são analisados resultados de entrevistas com pessoas 60 anos ou idade residentes em duas Instituições Longa Permanência no Distrito Federal, p...

The Roman theatre of Padua stood in the area now occupied by Prato della Valle, a huge elliptical-shaped square with central green part (Isola Memmia) surrounded canal, built second half 18th century and modern urban city center Padua. Some still-preserved remains stand at bottom this canal. Recently, 2017, emptying cleaning canal excavating these remains, which had been known past, new geometr...

The WAS—Waterscape Archaeology in Sicily—project is dedicated to underwater cultural heritage mapping, knowledge and awareness of the heritage, dissemination, analysis submerged environment concerning coast. prototype investigation site presented here Isola delle Femmine (PA, Italy). This paper highlights archaeological discovery with a description main finds, across multidisciplinary approach,...