Data bunching, effects

FIGURE I The effects of data bunching on a signal from a chromatogram acquired at a high data rate. 

This ansatz tends to conform to various data, and, as will be later pointed out, gives predictions of various nonlinear optical effects as well as vortex effects and photon bunching. 

Figures 4-38-4-42 [44] show temperature profile data (heating for a fiowing polymethyl methacrylate, Rohm and Haas VMIOO). The behavior is similar to that found earlier for polyethylene, namely, depression at the tube center (compressibility cooling) and peaking near the wall (viscous dissipation). Also, the effect of residence time is clearly shown by the bunching of the profiles at higher mass flow rates.

Use of arithmetic graph paper tends to bunch at the lower end (due to the expansion of the sieve size scale). This can be overcome by use of semi-log or log-log graph paper. Also note that cumulative graphs have the effect of smoothing out the data. This can be a useful effect in the presentation of data Care should be exercised, however, to prevent important features of the distribution being obscured in analytical work. 

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