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The Nyquist–Shannon sampling theorem is an essential principle for digital signal processing linking the frequency range of a signal and the sample rate required to avoid a type of distortion called aliasing. The theorem states that the sample rate must be at least twice the bandwidth of the signal to avoid aliasing.
A COVID-19 vaccine card is a record often given to those who have received a COVID-19 vaccine showing information such as the date(s) one has received the shot(s) and the brand of vaccine one has received, sometimes including the lot number. The card also contains information identifying the recipient and the location where the shot was given.
A vaccine passport or proof of vaccination is an immunity passport employed as a credential [1] in countries and jurisdictions as part of efforts to control the COVID-19 pandemic via vaccination. A vaccine passport is typically issued by a government or health authority, and usually consists of a digital or printed record.
Vaccine cards should be treated like other personal and important government-issued documents like a Social Security card or passport, and when not in use, left at home for safekeeping, Dr ...
As with the Nyquist–Shannon sampling theorem, this theorem also assumes an idealization of any real-world situation, as it only applies to functions that are sampled over an infinitude of points. Perfect reconstruction is mathematically possible for the idealized model but only an approximation for real-world functions and sampling techniques ...
Public health experts are warning of a ‘quad-demic’ this winter. Here’s where flu, COVID, RSV, and norovirus are spreading
Fig 1: Typical example of Nyquist frequency and rate. They are rarely equal, because that would require over-sampling by a factor of 2 (i.e. 4 times the bandwidth). In signal processing, the Nyquist rate, named after Harry Nyquist, is a value equal to twice the highest frequency of a given function or signal
New hires in Amazon warehouses can earn a $100 bonus on their first day for showing proof of COVID-19 vaccination. ... is giving its employees $125 gift cards when providing proof of vaccination.