The calculation of exclusive observables beyond the one-loop level requires elaborate techniques for the computation of multi-leg two-loop integrals. We discuss how the large number of different integrals appearing in actual two-loop calculations can be reduced to a small number of master integrals. An efficient method to compute these master integrals is to derive and solve differential equati...

We study the O(αtαs+αt ) two–loop corrections to the minimization conditions of the MSSM effective potential, providing compact analytical formulae for the Higgs tadpoles. We connect these results with the renormalization group running of the MSSM parameters from the grand unification scale down to the weak scale, and discuss the corrections to the Higgs mixing parameter μ and to the running CP...

I study a model of dynamic policy making in which citizens do not have complete knowledge of how policies are mapped into outcomes. Citizens are able to order policies in the single-dimensional space according to the outcomes they are expected to produce but not according to the realized outcomes they do produce. They learn about the mapping through repeated elections as policies are implemente...

In this letter, the phase compensation method to remove an interfering phase in Pi-SAR-X2 POLSAR data is proposed. This phase is induced when a steep surface is observed by the H and V polarization antennas which are vertically placed. The proposed method removes the phase errors by using the elevation data which is acquired with the slave-V antenna displaced in the cross-track direction (for i...

It is well known that a program execution exhibits time-varying behavior, i.e., a program typically goes through a number of phases during its execution with each phase exhibiting relatively homogeneous behavior within a phase and distinct behavior across phases. In fact, several recent research studies have been exploiting this time-varying behavior for various purposes. This paper proposes ph...

We present a phase-aligned space-time coding scheme that expands the original Alamouti codeword to three or four transmit antennas (Nt = 3 or 4) with phase alignment. With 1 ∼ 2 bits feedback for the phase information, the fundamental performance penalty of 10log10(Nt) dB of orthogonal space-time coding compared to the optimum beamforming is reduced by 1 dB (for Nt = 3) or 2 dB (for Nt = 4) on ...

For the sake of simplicity, fracture healing can be divided into phases, but it must be stressed that events described in one phase persist into the next and that events that occur in subsequent phases begin in an earlier phase (Fig. 3-1). The arbitrary phase division makes the overall picture clearer. These events have been described through the years in investigative reports and review articl...

Grid connected applications require an accurate estimate of the grid angle to feed power synchronously to the grid. This is achieved using a software phase locked loop (PLL). This application report discusses different challenges in the design of software phase locked loops and presents a methodology to design phase locked loops using C2000 controllers for single phase grid connection applicati...

A digital implementation of a new technique that delivers an extremely accurate and stable phase locked loop system (PLL) is presented. The new technique uses competing phase and frequency loops to incorporate an accurate local reference frequency into the phase locked loop structure. Disturbances on the phase loop caused by the digital frequency loop are identified and a method to mitigate the...

active filters have proven to be more effective than passive techniques to improve power quality and to solve harmonic and power factor problems due to nonlinear loads. this paper proposes a control scheme based on the instantaneous active and reactive power. the inverter of this active filter is a three-phase, two-level converter. space vector technique is used as modulators and pattern genera...