The positive and negative amplitudes of the pulses forming the Barker codes imply the use of biphase modulation or binary phase-shift keying; that is, the change of phase in the carrier wave is 180 degrees.
12.
The reason why air is not more widely used as a general-purpose refrigerant is because there is no change of phase, and is therefore too inefficient to be practical in most applications . harmless to plants and animals.
13.
This poor marking is shown by doubling of the visual; a lack of clarity; a streak of colour or wavy colours ( especially for four-colour shades ) during a change of phase by inclination of the visual.
14.
The third term represents leakage of probability into bin j from the left . The fourth term represents leakage from bin j to the left . The final term represents any change of phase in the probability amplitude in bin j.
15.
Differential Thermal Analysis ( DTA ) and Differential Scanning Calorimetry ( DSC ) are techniques which can be used to determine temperatures at which changes of phase or state ( e . g . glass to supercooled liquid, around the glass transition temperature, Tg ) occur in a material.
