Dirichlet Laplacian on curved tubes of a constant cross section in two and three dimensions is investigated. It is shown that if the tube is non{straight and its curvature vanishes asymptotically, there is always a bound state below the bottom of the essential spectrum. An upper bound to the number of these bound states in thin tubes is derived. Furthermore, if the tube is only slightly bent, t...

We propose and investigate ultracompact aperture-coupled plasmonic ring resonators with submicron bending radii based on strongly-confined metal-insulator-metal plasmonic waveguides. Enhanced coupling can be obtained via diffraction by small apertures having typical widths between 50-100 nm in the metallic sidewall between the ring and bus waveguides. Both analytical model and rigorous FDTD sim...

When an electron moves in a bending magnet it emits synchrotron radiation and generates a wakefield that effects other electrons in the beam. This wake is usually called a Coherent Synchrotron Radiation (CSR) wake and for a steady state case it has been computed in Refs. [2, 3]. In practice, bending magnets are often not long enough to assume that the wake is in the steady state. In the case wh...

An analytical model of a steel strip under alternate bending/reverse bending during roller leveling process is developed. A combined isotropic/kinematic hardening implemented through parameter. formulation the change effective stress as function strain cyclic loading with developed to predict distributions and residual curvature efficiently accurately. Dissimilar commonly used assumption one co...

The structure of the flexible IGZO TFTs was deposited on PET substrates using a magnetron radio frequency co-sputtering system at a low temperature. The resulting flexible IGZO TFTs exhibited the lower subthreshold swing value of 0.25 V/decade and the higher field-effect mobility of 24.4 cm/V-s. The field-effect mobility stability was measured by a bending radius of 1.17 cm under stress time fo...

A crystal bender for sagittal focusing has been designed for standard monochromators at SPring-8. The bender does not move the position of the crystal center when the bending radius is changed. Sagittal focusing from 40 keV to 60 keV was achieved by using Si(311) double crystals. The flux density of the focused beam measured at 40 keV was 15 times higher than that of the unfocused beam. The hei...

Equilibrium unilamellar vesicles are stabilized by one of two distinct mechanisms depending on the value of the bending constant. Helfrich undulations ensure that the interbilayer potential is always repulsive when the bending constant, K, is of order k(B)T. When K k(B)T, unilamellar vesicles are stabilized by the spontaneous curvature that picks out a particular vesicle radius; other radii are...