BACKGROUND Living tissues contain a range of intrinsic fluorophores and sources of second harmonic generation which provide contrast that can be exploited for fresh tissue imaging. Microscopic imaging of fresh tissue samples can circumvent the cost and time associated with conventional histology. Further, intrinsic contrast can provide rich information about a tissue's composition, structure an...

A model of a multidimensional system, consisting of a chain of nonlinearly coupled chaotic pendula subjected to a chaos-inducing harmonic parametric excitation, is introduced. The nonlinear dynamics of the chain is analyzed with attention to the synchronization phenomena. The control of chaos (suppression and enhancement) through the introduction of a second periodic excitation is investigated,...

We study second harmonic generation (SHG) from non-centrosymmetric nanocrystals under linearly polarized (LP) and circularly polarized (CP) excitations. Theoretical models are developed for SHG from nanocrystals under both plane-wave and focused excitations. We find that the focused excitation reduces the polarization dependency of the SHG signal. We show that the SHG response under CP excitati...

We inverse engineer fast rotations of a transversally tight, linear trap with two ions for predetermined rotation angle and time, avoiding final excitation. Different approaches are analyzed compared when the same species or different species. The separability into dynamical normal modes equal in harmonic trap, non-harmonic traps up to quartic terms allows simpler computations protocols. For no...

A multi-functional, three-mode, self-exciting pneumatic vibroactuator was investigated. The special feature of this is that it consists two excitation chambers connected by an elastic synchronizing chain. mathematical model the created, which solved numerical methods. laws (modes) movement working organ have been determined: harmonic, non-harmonic, and pulsating. results experimental research a...

Nonlinear wave run-up on the beach caused by a harmonic wave maker located at some distance from the shore line is studied experimentally. It is revealed that under certain wave excitation frequencies, a significant increase in run-up amplification is observed. It is found that this amplification is due to the excitation of resonant mode in the region between the shoreline and wave maker. Frequ...

The meson(K and π) exchange currents for the hypernuclear magnetic moments are calculated using the effective Lagrangian method. The seagull diagram, the mesonic diagram and the Σ-excitation diagram are considered. The Λ-N exchange magnetic moments for the 5ΛHe, 6 ΛHe and 6 ΛLi are calculated employing the harmonic oscillator shell model. It is found that the two-body correction is about -9% of...

The time-harmonic eddy current problem with either voltage or current intensity excitation is considered. We propose and analyze a new finite element approximation of the problem, based on a weak formulation where the main unknowns are the electric field in the conductor, a scalar magnetic potential in the insulator and, for the voltage excitation problem, the current intensity. The finite elem...

Harmonic wave excitation in a semi-infinite incompressible hyperelastic 1D rod with the Mooney–Rivlin equation of state reveals formation and propagation shock fronts arising between faster slower moving parts initially harmonic wave. The observed result collapse being absorbed by parts; hence, to attenuation kinetic elastic strain energy corresponding heat generation. Both geometrically physic...

The presentation concerns a synthesizer of disordered voices. The synthesizer consists of a non-linear model of the phonatory excitation and a vocal tract simulation based on a concatenation of cylindrical tubelets. For each tubelet, viscous, thermal and wall vibrations losses are modeled by means of numerical filters. A conical tubelet is added at the lip-end to simulate the transition from on...