Discrepancies in the assessment of thoracoabdominal asynchrony are observed depending on the choice of respiratory movement sensors. We test the hypothesis that these discrepancies are due to a different dependence of the sensors on cross-sectional perimeter and area variations of the chest wall. First, we study the phase shift between perimeter and area (Phi(PA)) for an elliptical model, which...

In this paper, stress-intensity factor solutions are presented for an embedded elliptical crack in a round bar subjected to tensile load. The factors (SIF) tabulated form and were obtained from three-dimensional finite-element analyses of configuration. provide the as function three dimensionless parameters representative size, aspect ratio flaw its relative position cross section. cover ranges...

We present a numerical investigation of the performance micropillar cavity single-photon source featuring an elliptical cross section. While ellipticity serves to establish polarization control emitted photons, it introduces trade-off due reduced coupling Gaussian profile in far field and need for significantly increased pumping power when resonant excitation scheme is implemented. Starting fro...

IR this paper the high energy expansion introduced in our previous paper is i used to describe to the problem of beamstrahlung due to an extended pulse with an elliptical cross section of arbitrary eccentricity. We show that the transverse . geometry of the pulse enters in a remarkably simple scaling manner. This case _ is of interest because the radiative energy loss can be markedly reduced wh...

The probability that high-redshift quasars are gravitationally-lensed by intervening galaxies increases rapidly with the cosmological constant, ΩΛ0 (whilst being only weakly dependent on the density parameter, Ωm0), and the low number of lenses observed implies that ΩΛ0 ∼< 0.7 (e.g. Kochanek 1996). One of many uncertainties has been the (small) core radii of elliptical galaxies, which, at least...

We demonstrate the realization of a two-dimensional chiral optical waveguide with an infinite translational symmetry that exhibits asymmetric wave propagation. The low-symmetry geometry of the cross-section that lacks any rotational and mirror symmetries shows in-principal directional asymmetric polarization rotation. We use general symmetry arguments to provide qualitative analysis of the wave...

We study the dynamics of a prolate spheroidal microswimmer in Poiseuille flow for different flow geometries. When moving between two parallel plates or in a cylindrical microchannel, the swimmer performs either periodic swinging or periodic tumbling motion. Although the trajectories of spherical and elongated swimmers are qualitatively similar, the swinging and tumbling frequency strongly depen...

We show that femtosecond (fs) laser enables us to produce true three-dimensional (3D) microstructures inside a photosensitive glass (Foturan), which has superior properties on transparency, hardness, and chemical and thermal resistances. Exposure to the focused laser beam writes latent images inside the glass. Modified regions are developed by a post baking process and then preferentially etche...