Maximum power consumption is an important consideration in server design, as the total power envelope affects cooling costs and can limit performance. One approach to limiting total power is power shifting, managing power budgets among system sub-components to meet an overall total constraint. In this paper, we investigate processor-memory power shifting on a multi-threaded, 32-core commercial ...

A new phase-shifting interferometry analysis technique has been developed to overcome the errors introduced by nonlinear, irregular, or unknown phase-step increments. In the presence of a spatial carrier frequency, by observation of the phase of the first-order maximum in the Fourier domain, the global phase-step positions can be measured, phase-shifting elements can be calibrated, and the accu...

We investigate both numerically and experimentally soliton propagation in a fiber loop with dispersion management, in-line filters, and frequency shifting. More than 90% of the fiber in the loop is in the normal-dispersion regime, but the net dispersion is anomalous. Stable pulses in the loop have an enhanced power relative to solitons in a fiber with uniform dispersion equal to the loop's path...

A finite element model of a total hip replacement (THR) has been developed from the approach of modal analysis. The model is capable of determining the first 15 Eigenmodes of a THR with an artificial bone model. The model was equipped with several different defects to simulate a loosening of THR and to enforce a shifting of the frequency spectrum of the system’s Eigenfrequencies. Using the prel...

This work reveals an experimental microscopy acquisition scheme successfully combining compressed sensing (CS) and digital holography in off-axis and frequency-shifting conditions. CS is a recent data acquisition theory involving signal reconstruction from randomly undersampled measurements, exploiting the fact that most images present some compact structure and redundancy. We propose a genuine...

A self-oscillating class-D audio amplifier adopting the phase-shifting looap filter in the feedback filter is proposed. To validate the design, a mathematical model is proposed. It is alleged in a very simple form which describes the switching frequency variation as the function of the modulation depth to be applied to any general structure: phase shifting, time delay of the loop, and the hyste...

We have applied a frequency shifting method, which was proposed previously in the literature for mixer manipulation, with the aim of generating vibration-based feedback to enrich the listener’s musical experience. Experimental results showed that the proposed method significantly increased the listener’s evaluation of sound consisting of high-frequency components, while a relatively poor evalua...