Nonlinear retention time variations in chromatography-mass spectrometry data sets are adjusted by time-alignment methods, enabling automated comparison of spectra for differential phenotyping and other applications. Signals of a plurality of main colors in the digital image are extracted and the extracted signals are used to generate a 3\xd73 color matrix. Preferably, the sheet of colored material is placed in the mold and the reinforced polymeric material is injected into the mold, onto the back of the colored sheet. A decoupling unit generates a decoupling noise with a second power and provides the decoupling noise to the first power voltage. A pitched roof is removably connected to upper ones of the support walls and is formed from water-impermeable material.