You will see a USB 3 section and a USB 2 section. USB 3 devices will appear in the USB 3.0 SuperSpeed section. Other devices will appear in the USB Hi-Speed section. Clicking the disclosure triangle will allow you to see more detail on the devices connected. 1  From the Apple (ï£¿) menu, choose About this Mac.
We have observed three categories of disease known to cause a CT mosaic pattern of lung attenuation: small-airway disease, vascular lung disease, and infiltrative disease. Diseases from each of these categories can cause similar patterns of mosaic lung attenuation on CT scans.
This article is about attenuation in physics. For other uses, see Attenuation (disambiguation). In physics, attenuation (in some contexts also called extinction) is the gradual loss in intensity of any kind of flux through a medium. For instance, dark glasses attenuate sunlight, lead attenuates X-rays, and water attenuates both light and sound.