A recent econometric literature has critiqued the use of regression discontinuities where administrative borders serve as ‘cutoff’. Identification in this context is difficult since multiple treatments can change at cut-off and individuals easily sort on either side border. This note extends difference-in-discontinuities framework discussed Grembi et al. (2016) to a geographic setting. paper fo...

In this thesis, the application of numerical techniques to electromagnetic problems in microelectronic and radar imaging systems are investigated. In particular the following problems are studied: (1) Dielectric rib waveguide discontinuities are analyzed with the Finite Difference Time Domain (FDTD) method. The application of Berenger's Perfectly Matched Layer to multi-layered dielectrics is an...

Many systems of both theoretical and applied interest display multiaffine scaling at small length or time scales. We demonstrate analytically and numerically that when vertical discontinuities are introduced into a self-affine function, the function becomes multiaffine. The discontinuities may correspond to surface overhangs or some source of discontinuous noise. Two functions are numerically e...

We study transfer operators associated to piecewise monotone interval transformations and show that the essential spectrum is large whenever Banach space bounds $L^\infty$ transformation fails be Markov. Constructing a family of spaces we lower bound on spectral radius optimal. Indeed, these realise an as close desired theoretical best possible case.

measurement of the stroke volume and its changes over time can be very helpful for diagnosis of dysfunctions in the blood circulatory system and monitoring their treatments. impedance cardiography (icg) is a simple method of measuring the stroke volume based on changes in the instantaneous mean impedanceof the thorax. this method has received much attention in the last two decades because it is...

An integrated approach of reservoir characterization a field was performed using seismic attributes and petrophysical parameters for the evaluation subsurface geological features hydrocarbon potential an onshore in Niger Delta Basin. Four intervals were identified within wells based on their position stratigraphic column, correlation, which aided principle uniform horizontality, simple rule tha...

A longitudinal, single bunch instability is observed in the damping rings of the Stanford Linear Collider (SLC).[l] Beyond a threshold bunch population of 3 x 10” particles the bunch energy spread increases and a “saw-tooth” variation in bunch length and synchronous phase as functions of time is observed. Although the relative amplitude of the saw-tooth variation is small-only on the order of l...

In seismic images, the opaque oscillatory nature of the ever present sedimentary layers often hide the boundaries between sedimentary packages, such as faults or river channels. Interpreters painstakingly identify these boundaries by inspecting individual planes of the image volume. Discontinuity attribute maps computed from image volumes depict these boundaries and greatly simplify and acceler...