Stereoscopic surface detection of human and ideal observers was assessed using a signal detection paradigm. Signal displays were disparity defined sinusoidal or square wave corrugations in depth containing various amounts of additive disparity noise. Distracter displays were created by scrambling pure signal stimuli along the vertical dimension destroying surface representation while leaving th...

In this paper, the performance of the recently proposed adaptive signal models on modeling speech voiceless stop sounds is presented. Stop sounds are transient parts of speech that are highly non-stationary in time. State-of-the-art sinusoidal models fail to model them accurately and efficiently, thus introducing an artifact known as the pre-echo effect. The adaptive QHM and the extended adapti...

Multi-resolution sinusoidal modeling is a method of representing audio signals as a sum of discrete sinusoids having various durations, and time-varying frequencies, phases, and amplitudes. This paper discusses the motivation for the multiresolution sinusoidal model (MRSM) and various structures used to compute it. A new filter-bank analysis structure is presented that is simpler than previous ...

We have undertaken an extensive study of X-ray data from the accreting millisecond pulsar XTE J1751–305 observed by RXTE and XMM-Newton during its 2002 outburst. In all aspects this source is similar to a prototypical millisecond pulsar SAX J1808.4–3658, except for the higher peak luminosity of 13 per cent of Eddington, and the optical depth of the hard X-ray source larger by factor ∼2. Its bro...

Zigzag graphene nanoribbons (ZGNRs) are antiferromagnetic in the ground state with zero net magnetization due to the compensation of contributions from opposite edges. Uniform deformations (both shear and axial) do not produce magnetization due to symmetry restrictions. However, we report the results of first-principles calculations that predict the induction of spin density waves (SDWs) in ZGN...

The exponential sinusoidal model (ESM) for parameterizing speech signals is proposed in this paper. The main feature of the ESM is that the amplitude of each sinusoidal component is allowed to vary exponentially with time. A novel variable segmentation strategy is applied first to separate individual transients of a voiced phoneme, which can then be fitted with the ESM. The epoch of a transient...

A sinusoidal grating can be viewed as a series of light and dark bars. Here we measure the contrast discrimination thresholds for light and dark bars individually, and find that the contrast discrimination thresholds for the whole sinusoid can be explained as ideal summation of the light and dark bar thresholds. We propose a model for light bar, dark bar, and sinusoidal contrast discrimination ...