The behaviour of the capacitances of LDMOS devices as a function of gate and drain bias is analysed using TCAD simulations and S-parameter measurements. Both simulations and measurements revealed that instead of the smooth sigmoïd shape usually seen in MOSTs, the capacitances of LDMOS devices show a distinct ridge at low values of Vds. A full analysis of this phenomena is used to propose a sign...

We study quantum scattering theory off n point inhomogeneities (n ∈ N) in three dimensions. The inhomogeneities (or generalized point interactions) positioned at {ξ1, . . . , ξn} ⊂ R3 are modeled in terms of the n2 (real) parameter family of self-adjoint extensions of−∆ ∣∣ C∞ 0 (R3\{ξ1,...,ξn}) in L2(R3). The Green’s function, the scattering solutions and the scattering amplitude for this model...

Abstract. Given two unitary involutions σ1 and σ2 satisfying Gσi = −σiG on kerB on a compact manifold with cylindrical end, M. Lesch, K. Wojciechowski ([LW]) and W. Müller ([M]) established the formula describing the difference of two eta-invariants with the APS boundary conditions associated with σ1 and σ2. In this paper we establish the analogous formula for the zeta-determinants of Dirac Lap...

Sub-surface scattering is key to our perception of translucent materials. Models based on diffusion theory are used to render such materials in a realistic manner by evaluating an approximation of the material BSSRDF at any two points of the surface. Under the assumption of perpendicular incidence, this BSSRDF approximation can be tabulated over 2 dimensions to provide fast evaluation and impor...

Numerous neutron scattering studies of bio-molecular dynamics employ a qualitative analysis of elastic scattering data and atomic mean square displacements. We provide a new quantitative approach showing that the intensity at zero energy exchange can be a rich source of information of bio-structural fluctuations on a pico- to nano-second time scale. Elastic intensity scans performed either as a...

As devices are reduced in size, interfaces start to dominate electrical transport making it essential to be able to describe reliably how they transmit and reflect electrons. Wave function matching (WFM) is a transparent technique for calculating transmission and reflection matrices suitable for any Hamiltonian that can be represented in tight-binding form. A firstprinciples Kohn-Sham Hamiltoni...

We present algorithms for feature extraction from complex SAR imagery. The features parameterize an attributed scattering center model that describes both frequency and aspect dependence of scattering centers on the target. The scattering attributes extend the widely-used point scattering model, and characterize physical properties of the scattering object. We present two feature extraction alg...

A time-of-flight camera suffers from significant range distortion due to the scattering artefact caused by secondary reflections occurring between the lens and the image plane. The reflected beam from the foreground objects undergoes multiple reflections within the camera device thereby introducing parasitic signals that bias the late-arrival, backscattered signals from the background targets. ...

Global light transport is composed of direct and indirect components. In this paper, we take the first steps toward analyzing light transport using high temporal resolution information via time of flight (ToF) images. The time profile at each pixel encodes complex interactions between the incident light and the scene geometry with spatially-varying material properties. We exploit the time profi...