Objective: Heart rate variability (HRV) offers a noninvasive way to peek into the physiological status of the human body. When this physiological status is dynamic, traditional HRV indices calculated ...

There's a new record holder for the most accurate clock in the world. Researchers at the National Institute of Standards and ...

To guarantee a good resolution of a Time-Of-Flight Mass Spectrometer (TOF-MS), a high-performance time measurement system was required. This paper presents a time measurement system based on waveform ...

- Air temperature at a specific time Air temperature (more specifically, dry bulb air temperature to differentiate from observations to measure humidity) is measured at various times of the day as ...