We present an investigation of a two-dimensional inelastic impact oscillator representing a friction force microscope. This paper includes the equations of motion, an analysis of the Jacobi matrix, and the fundamental domain. By applying periodic orbit theory to these and then calculating the diffusion, we find a possible link between nanotribology and everyday kinetic friction. Included is a s...

abstract       background and aim: dimensional changes of the impression materials after disinfection is a serious problem in dentistry which could fail the treatment. the aim of this study is to determine the effect of three disinfectants:2% deconex,5.25% sodium hypochlorite and nanosil d2 ,on dimensional changes of bayer alginate.       materials and methods: this experimental study was condu...

A bstract Using exceptional generalised geometry, we classify which five-dimensional $$ \mathcal{N} N = 2 gauged supergravities can arise as a consistent truncation of 10-/11-dimensional supergravity. Exceptional geometry turns the classification into an algebraic problem finding subgroups G S ⊂ USp(8) E 6(6)...

Abstract In this paper we present an optimized manufacturing technique for special long-wavelength 1-dimensional and 2-dimensional Vertical Cavity Surface Emitting Laser Diode (VCSEL) arrays with focus on die bonding a wire process as well additional possibilities to make the more productive increase product quality, reliability, life time. VCSEL have very broad application potential. Objective...