Passive and semipassive RFID tags do not use a radio transmitter; instead, they use modulation of the reflected power from the tag antenna. Reflection of radio waves from an object has been a subject ...

All the calculations we've performed so far assume that a wave leaves the antenna and strikes the tag, interacting with no other objects. This kind of calculation is very sensible if the tag and ...

```{r echo=T, results='hide', error=FALSE, warning=FALSE, message=FALSE} #set working directory so R knows where to find and save data. This is the folder you created when you made a workspace above.

## 4.4.1 Create a dataframe of the total visits per individual across the whole of your experiment, irrespective of feeder. (hint: group_by) ## 4.4.2 Create a new dataframe that excludes individuals ...

After barcodes were put into use more than 50 years ago, the technology revolutionized the grocery business. The technology also revolutionized nearly everything else in the supply chain and logistics ...