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.
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, sunlight is attenuated by dark glasses, X-rays are attenuated by lead, and light and sound are attenuated by water.n engineering, attenuation is usually measured in units of decibels per unit length of medium (dB/cm, dB/km, etc.) and is represented by the attenuation coefficient of the medium in question.