| The spectral variability of natural materials has been known for a long time from laboratory studies. |
| To maintain the continuity of the record it is necessary that the cycled radiometers have the same spectral responsivities. |
| Linear amplifiers are much less efficient but pass complex transmission signals with minimum distortion, thus preserving spectral utilization. |
| The group of wavefronts is called a spectral decomposition wave of the ultrashort pulse. |
| The residual error in both of these fits is small, indicating that the same spectral components can fit these measurements at both temperatures. |
| In the same year he generalised von Neumann's spectral theorem to locally compact abelian groups. |
