Without variable valve timing or variable valve lift, the valve timing must be the same for all engine speeds and conditions, therefore compromises are necessary. An engine equipped with a variable valve timing actuation system is freed from this constraint, allowing performance to be improved over the engine operating range.
A variety of medical specialists treat people with osteoporosis, including internists, gynecologists, family doctors, endocrinologists, rheumatologists, physiatrists, orthopaedists, and geriatricians. There are a number of ways to find a doctor who treats osteoporosis patients. If you have a primary care or family doctor, discuss your concerns with him or her. Your doctor may treat the disease or be able to refer you to an osteoporosis specialist.
Osteoporosis is a dangerous bone disease which leads to an increased risk of bone fractures. Various different medical researchers and Physicians of different times contributed to the discovery of osteoporosis disease with their efforts.Famous English physician, Sir Astley Paston Cooper was the first person to depict about osteoporosis.arious different medical researchers and Physicians of different times contributed to the discovery of osteoporosis disease with their efforts. Famous English physician, Sir Astley Paston Cooper was the first person to depict about osteoporosis.