Such an assessment may be performed either experimentally or analytically. Results predicted by linear sandwich theory correlate well with the experimentally determined results. The coefficients are calculated by fitting to experimentally measured masses of nuclei. Thus it is the only promethium isotope with an experimentally observed alpha decay. All corresponding values have been calculated from experimentally obtained data using interpolation. These limits are to be found experimentally and experientially. The dashed lines show how these transitions map onto features that can be observed experimentally. Glashow is a skeptic of superstring theory due to its lack of experimentally testable predictions. This equation is based on five experimentally determined constants. Opals of all varieties have been synthesized experimentally and commercially. This is useful for calculating the radius of a quantum dot from experimentally determined parameters. Special relativity has many counterintuitive and experimentally verified implications. The following is a list of experimentally validated riboswitches, organized by ligand. Calculated values for "c" have been found to vary slightly from experimentally determined values. In 1914, Napoleon Cybulski and Jelenska-Macieszyna photographed EEG recordings of experimentally induced seizures.