Glottal vibration is fundamental to breathing-related disorders and respiratory sound generation. However, responses of the flow acoustics glottal vibrations different frequencies are unclear. The objective this study numerically evaluate influences on inspiratory airflow dynamics flow-induced signals; from normal phonation that driven by controlled expiratory flows. A computational model was d...

We provide a general mechanism for obtaining uniform information from pointwise data. A sample result is that if a diffeomorphism of a compact Riemannian manifold has pointwise expanding and contracting continuous invariant cone families, then the diffeomorphism is an Anosov diffeomorphism, i.e., the entire manifold is uniformly hyperbolic.

We study the entropy production for inverse SRB measures for a class of hyperbolic folded repellers presenting both expanding and contracting directions. We prove that for most such maps we obtain strictly negative entropy production of the respective inverse SRB measures. Moreover we provide concrete examples of hyperbolic folded repellers where this happens. Mathematics Subject Classification...

We discuss a physical implementation of the Crystalline robot system. Crystalline robots consist of modules that can aggregate together to form distributed robot systems. Crystalline modules are actuated by expanding and contracting each unit. This actuation mechanism permits automated shape metamorphosis. We describe the Crystalline module concept and a physical implementation of a robot syste...

In this paper it is shown that in Brans-Dicke (BD) theory, if one considers a non-minimal coupling between the matter and scalar field, it can give rise to a bouncing universe (i.e. an expanding universe preceded by a contracting universe). Two examples of such universes have been considered in a spatially flat FRW universe and their physical properties have been studied.

Weprovide a generalmechanism for obtaining uniform information from pointwise data. A sample result is that if a diffeomorphism of a compact Riemannian manifold has pointwise expanding and contracting continuous invariant cone families, then the diffeomorphism is an Anosov diffeomorphism, i.e., the entire manifold is uniformly hyperbolic.

The Dirac-Born-Infeld (DBI) action of the 3-dimensional brane for its dynamical embeddings and the gauge fields has been studied. The evolution of both the D3-brane and the ambient space has been obtained. For the special constraint put on the transverse coordinates a family of the contracting and expanding spaces has been found. PACS : 11.25.-Uv; 11.27.+d

It is commonly believed that Alcubierre’s warp drive works by contracting space in front of the warp bubble and expanding space behind it. We show that this expansion/contraction is but a marginal consequence of the choice made by Alcubierre, and explicitly construct a similar spacetime where no contraction/expansion occurs.

We present the method for computation of fluid flows characterized by the large degree of expansion/contraction and in which the fluid velocity is dominated by the bulk component associated with the expansion/contraction and/or rotation of the flow. We consider the formulation of Euler equations of fluid dynamics in a homologously expanding/contracting and/or rotating reference frame. The frame...

Coupling light into and/or out of a photonic integrated circuit is often accomplished by establishing vertical link between single-mode optical fiber and resonant waveguide grating, which then followed tapered waveguides. The operates as spot-size converter, laterally expanding or contracting the beam grating. In this work, we propose using subwavelength structures to achieve tapering functiona...