For [Jianjia Ma]’s QingStation, he decided to build another type of wind sensor: An ultrasonic anemometer. Ultrasonic anemometers have no moving parts but come at the cost of significantly more ...

Hand held anemometer, Sir Francis Galton type, by James Joseph Hicks, 8, 9 & 10 Hatton Garden, London, England, 1882-1894. Fitted with sand glass and mounted on later wooden stand.

They are considered some of the most beautiful meteorites. There are two different types of stony-iron meteorites: pallasite and mesosiderite. Pallasites contain big, beautiful olive-green crystals - ...

To measure wind speed and direction, most people turn the traditional cup anemometer and wind vane. Another less-known method is to use an array of ultrasonic transducers, which doesn’t need any ...

There are five main types of life insurance to choose from. Here’s a breakdown of what each one covers. Many, or all, of the products featured on this page are from our advertising partners who ...

Psychotherapy approaches are many and varied. Some types of therapy have been in use for decades, such as person-centered therapy (also known as Rogerian therapy), and others are relatively new ...

Types of insomnia include onset insomnia (trouble falling asleep), maintenance insomnia (trouble staying asleep), and behavioral insomnia of childhood. The insomnia may be acute or chronic ...

Both can be worthwhile investments, and you can find both types of stock on major exchanges. The main difference between preferred and common stock is that preferred stock acts more like a bond ...

While Alzheimer's disease is the most common form of dementia, there are also other common types such as vascular dementia, Lewy body dementia and Frontotemporal dementia. There are also rarer types ...