Those with previous falls, as well as those with gait or balance disorders, are most at risk. Risk factors. Risk factors for osteoporotic fracture can be split between nonmodifiable and (potentially) modifiable. In addition, osteoporosis is a recognized complication of specific diseases and disorders. Medication use is theoretically modifiable, although in many cases, the use of medication that increases osteoporosis risk may be unavoidable. Caffeine is not a risk factor for osteoporosis. It is more likely in females than males. Nonmodifiable
In fast frequency hopping type, one complete or fraction of data symbol is transmitted during the time between two frequency hops. Due to this, frequency hopping rate may exceed often compare to data bit rate in a binary sequence. In fast frequency hopping, time duration between two hops (Th or Tc as shown) <= data bit duration (Tb). This is depicted in the figure-2. â¨The fast frequency hopping provides frequency diversity at symbol level. This will benefit the transmitted signal against fading as well as narrowband jamming.
Hertz (abbreviated: Hz) is the standard unit of measurement used for measuring frequency. Since frequency is measured in cycles per second, one hertz equals one cycle per second. Hertz is used commonly used to measure wave frequencies, such as sound waves, light waves, and radio waves. For example, the average human ear can detect sound waves between 20 and 20,000 Hz. Sound waves close to 20 Hz have a low pitch and are called bass frequencies. Sound waves above 5,000 Hz have a high pitch and are called treble frequencies. While hertz can be used to measure wave frequencies, it is also used to measure the speed of computer processors. For example, each CPU is rated at a specific clock speed.