DROWNING |
|
Drowning is death caused by the filling of the lungs by a liquid, usually water, rendering breathing ineffective and leading to death due to asphyxia. Near drowning is initial survival of a drowning event, and can lead to serious secondary complications including death later on; cases of near drowning therefore also require attention by medical professionals. Secondary drowning is death due to chemical and biological changes in the lungs after a near drowning incident or exposure to chemicals. In many countries, drowning is one of the leading causes of death for children under 14 years old.
|
FIBER OPTICS |
|
An optical fiber (or fibre) is a transparent thin fiber, usually made of glass or plastic, for transmitting light. Fiber optics is the branch of science and engineering concerned with such optical fibers.
Optical fibers are commonly used in telecommunication systems, as well as in illumination, sensors, and imaging optics.
|
HELICOPTERS |
|
A helicopter is an aircraft which is lifted and propelled by one or more horizontal rotors (propellers). Helicopters are classified as rotary-wing aircraft to distinguish them from conventional fixed-wing aircraft. The word helicopter is derived from the Greek words helix (spiral) and pteron (wing). The engine-driven helicopter was invented by the Slovak inventor Jan Bahyl. The first stable, single-rotor, fully-controllable helicopter to enter large full-scale production was made by Igor Sikorsky in 1942.
|
SEARCH ENGINE OPTIMIZATION PLACEMENT (SEO) |
|
Search engine optimization, or improving rankings for relevant keywords in search results by rectifying the website structure, and content such that they could be easly read and understood by the search engine's software programs. It is seen that website containing the latest trends and updates are first available to the visitor.
|
|
