I don't see that schematic in that paper, where did you get it from?
The bit on the very left side showing a PC USB being connected to pins 0 and 1 is not how to connect the Arduino to a PC. The PC needs to be connected to the USB Socket on the Arduino.
The operation amplifiers require what's called a split supply. That is a three pin power supply with +5V, Ground, and -5V. That schematic has a mixture +/- 6.5V and a -5V. There is a technical name for that, we call it rubbish, or to be more polite un-rationilised .
I also notice that the operational amplifiers have no part numbers on them.
So get a proper circuit would be my first advice on how to make this.
As well as following Pert's advice.