Radio telescopes are instruments that capture faint radio signals from space and convert them into images of celestial bodies ...

Breaking with decades of haloscope design, the ALPHA and MADMAX collaborations are pushing the search for dark matter into a ...

Chimpanzees use a variation of the "scientific method" — discarding prior beliefs if convincing new evidence comes along to change their minds, research shows. When you purchase through links on our ...

Abstract: In the fields of microseismic monitoring and deep earth exploration, low-frequency signal detection faces problems such as weak vibration signals, large ambient temperature changes, and ...

Measuring the density of a cell can reveal a great deal about the cell’s state. As cells proliferate, differentiate, or undergo cell death, they may gain or lose water and other molecules, which is ...

The structural and value changes following the global transformations since the end of the Cold War have contributed to shaping a global society characterized by complexity, interconnection, and ...

Objective: This study aims to employ physiological model simulation to systematically analyze the frequency-domain components of PPG signals and extract their key features. The efficacy of these ...

1 School of Stomatology, Xi’an Medical University, Xi’an, China 2 Institute of Medical Research, Northwestern Polytechnical University, Xi’an, China The dielectric properties of active biological ...

How to measure and characterize the analog bandwidth for a receiver’s ADC. The ins and outs of the fundamental frequency-response measurement method. How to assemble the proper test setup. With analog ...

Abstract: Bulk power systems show increasingly significant frequency spatial distribution characteristics (FSDCs), leading to a huge difference in the frequency response between regions. Existing ...