People Who Suffer Depression And Anxiety After A Traumatic Brain Injury May Have Damaged White Matter. Jun 16, 2015 12:00 AM By Ed Cara @EdCara4. Researchers from the University at Pittsburgh Medical Center may have figured out why people suffer depression and anxiety after a concussion.
How to Read Speed Rating, Load Index & Service Descriptions. Using a P195/60R15 87S tire size as our example, the 87S at the end of the size represents the tire's service description. A service description identifies the tire's load index and speed rating.
S, T, H, V, W, and Yâ¦what do all those letters mean, and why is it necessary to understand this tire speed rating? The speed-rating system we use today evolved from a rating system used in Europe to ensure safe performance from tires at specific speeds. In a tire test, the tires were matched to the maximum speed the vehicle could attain. Here is a list of the most common tire speed ratings, with the maximum speed that the tire tested passed without failure.