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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.
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 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.
More than half of all eligible Americans are fully vaccinated against Covid-19, which is becoming increasingly key to unlocking pre-pandemic activities like sporting events, concerts, and dining.
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 ...
Nyquist rate: sampling rate twice the bandwidth of the signal's waveform being sampled; sampling at a rate that is equal to, or faster, than this rate ensures that the waveform can be reconstructed accurately. Nyquist frequency: half the sample rate of a system; signal frequencies below this value are unambiguously represented. Nyquist filter
Southeastern grocer Publix is giving its employees $125 gift cards when providing proof of vaccination. Starbucks employees will receive up to four hours of paid time for vaccine dosage appointments.
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