Nature

A Purkinje image-based system for an assessment of the density and transmittance spectra of the human crystalline lens in vivo

A method for rapid and objective assessment of ocular lens density and transmittance is needed for research and clinical practice. The aim of this study was to determine whether the Purkinje ...
Phys.org

Mathematical method for spectral density estimation set to unlock ocean mysteries

Researchers at The University of Western Australia's ARC Industrial Transformation Research Hub for Transforming Energy Infrastructure through Digital Engineering (TIDE) have made a significant ...
Nature

Altered power spectral density in the resting-state sensorimotor network in patients with myotonic dystrophy type 1

Myotonic dystrophy type 1 (DM1) is the most common type of muscular dystrophy in adults 1. DM1 is an autosomal dominantly inherited multisystemic disease that involves the brain, and several ...
Electronic Design

What’s the Difference Between Power Density and Power Spectral Density?

Defining laser-beam power density. 2. Power spectral density is simply the Fourier transform of the signal. When we have a discrete case, as in Figure 2, the PSD can be calculated by using the fast ...
Electronic Design

Noise Spectral Density: A “New” ADC Metric?

Over the past decades, the high-speed analog-to-digital converter (ADC) performance metric that mattered to most has changed, albeit slowly. Primarily as a result of signal acquisition systems’ ever ...