How long have car phones been around?

1980s and 1990s The first 1G systems were created in 1982 by Nordic Mobile Telephone, and were used across Scandinavia and in other often-remote areas. In the United States, car phones used the Mobile Telephone Service, which was first created in St. Louis, or Improved Mobile Telephone Service.

What are the acting masks called?

Generally, known as ‘the Comedy and Tragedy Masks’ or just ‘the theater masks’, there is much mystery as to where these two masks really originate from. I was taught in school that these masks real names were Melpomene (Tragedy Mask) and Thalia (Comedy Mask). These were taken from Greek Mythology.

Can you make a compost bin out of wood?

Though you can buy a compost bin made from budget-friendly plastic or even chicken wire, a wood bin, typically made of rot-resistant cedar, will conceal those yard clippings and kitchen leftovers without sticking out like a sore thumb on your landscape. Or buy a compost bin for easy install.

What causes air bubbles in your bladder?

Emphysematous cystitis. Emphysematous cystitis is a rare type of infection of the bladder wall by gas-forming bacteria or fungi. The condition is characterized by the formation of air bubbles in and around the bladder wall. The gas found in the bladder consists of nitrogen, hydrogen, oxygen, and carbon dioxide.

What is the pole in polar coordinates?

Polar coordinates are points labeled (r,θ) and plotted on a polar grid. The reference point (analogous to the origin of a Cartesian system) is called the pole, and the ray from the pole in the reference direction is the polar axis.

Are thin cigarettes better for you?

Slim cigarette smokers not exposed to more harmful chemicals. A new study confirms that the exposure to tar tended to be lower for smokers of slim cigarettes than of regular cigarettes. Similarly, exposure to nicotine tended to be lower.

What is the best treatment for diabetic foot ulcers?

Successful treatment of diabetic foot ulcers consists of addressing these three basic issues: debridement, offloading, and infection control. Debridement. Debridement consists of removal of all necrotic tissue, peri-wound callus, and foreign bodies down to viable tissue. Offloading. Infection control.

How do you buy carpet padding?

Cut pile residential carpet, such as those with textures and twists, should have padding with a thickness of 1/2-inch or less. If you choose a low-pile carpet, which includes berber, loop pattern carpet and commercial varieties, the carpet pad thickness should be 3/8-inch or less.