Methods, systems, and devices are described for providing distributed virtual desktops. In particular a mixture including the anthocyanins, the bioflavonoids and the phenolics is described for this use. 8 MPa to exchange heat with helium in the MRI cryostat in a coupling heat exchanger that is located removeably in or proximate the neck tube of the MRI cryostat. Then, a scale image substantially representing the real size obtained is generated, combined with the object image and a synthesized image is presented. One or a pair of such earcup assemblies may be arranged to form a headset, wherein the assemblies are coupled to a headband via yokes.