Kite

A kite is traditionally a tethered heavier-than-air craft with wing surfaces that react against the air to create lift and drag. A kite consists of wings, tethers and anchors. Kites have a bridle to guide the face of the kite at the correct angle so the wind can lift it. A kite may have fixed or moving anchors.

The lift that sustains the kite in flight is generated when air flows around the kite's surface, producing low pressure above and high pressure below the wings. The interaction with the wind also generates horizontal drag along the direction of the wind. The resultant force vector from the lift and drag force components is opposed by the tension of one or more of the lines or tethers to which the kite is attached. The anchor point of the kite line may be static or moving (e.g., the towing of a kite by a running person, boat, free-falling anchors as in paragliders and fugitive parakites or vehicle).

The same principles of fluid flow apply in liquids and kites are also used under water.

Jade

Jade is an ornamental rock. The term jade is applied to two different metamorphic rocks that are composed of different silicate minerals:

Etymology

The English word jade is derived (via French l'ejade and Latin ilia "flanks, kidney area") from the Spanish term piedra de ijada (first recorded in 1565) or "loin stone", from its reputed efficacy in curing ailments of the loins and kidneys. Nephrite is derived from lapis nephriticus, the Latin version of the Spanish piedra de ijada.

Jade Warrior

Jade Warrior may refer to:

Cicada

The cicadas (/sɪˈkɑːdə/ or /sɪˈkeɪdə/), are a superfamily, the Cicadoidea, of insects in the order Hemiptera (true bugs). They are in the suborder Auchenorrhyncha, along with smaller jumping bugs such as leafhoppers and froghoppers. It is divided into the Tettigarctidae, with two species in Australia, and Cicadidae, with more than 1,300 species described from around the world; many undescribed species remain.

Cicadas have prominent eyes set wide apart, short antennae, and membranous front wings. They have an exceptionally loud song, produced not by stridulation but by vibrating drumlike tymbals rapidly. The earliest fossil Cicadomorpha appeared in the Upper Permian period; extant species occur all around the world in temperate to tropical climates. They typically live in trees, feeding on sap, and laying their eggs in a slit in the bark. Most cicadas are cryptic, singing at night to avoid predators. The periodic cicadas spend most of their lives as underground nymphs, only emerging after 13 or 17 years, most likely to reduce losses by satiating their predators.