The invention relates to a Magnus rotor having a cylindrical body of revolution for converting wind power into a feed force using the Magnus effect. According to the invention, the concentration of the sample gas andor reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. The flow profiles can be incorporated into a larger set of pre-stored or programmed instructions that also regulate temperature, volume, warming operations, and the like. Multi-carrier modulation may be applied to existing fiber channels, which may be of lower quality. Such a screen, when combined with matched polarization analyzing eyewear, provides extremely low cross-talk from any observation point. When dimensions of pillars become very small, the photoresist pillars used to pattern them may not have sufficient mechanical strength to survive the photoresist exposure and development process.