A heat dissipating apparatus includes a retention module forming clipping portions thereon, a heat sink mounted to the retention module, and a clip engaged with the retention module and the heat sink. A depth sensor generates a depth map of a scene within the field of view of the depth sensor, the field of view containing at least a portion of the user. Genes identified as cancer markers using the methods of the present invention find use in the diagnosis and characterization of prostate cancer. The instructions request the helper to respond to the phrases not in his or her own language, but rather with head movements, hand gestures such as pointing, drawings, or any other non-verbal response or universal method that does not require the traveler to understand the target language. The measurements made by the detector elements provide ellipsometryreflectometry data for the test surface.