Device

A device is usually a constructed tool, but may refer more specifically to:

Technology

Music

Other

See also

Device (pop rock band)

Device was a short-lived American pop-rock trio, formed by keyboardist, bassist and vocalist Holly Knight, vocalist Paul Engemann and guitarist Gene Black.

Device's only album, 22B3, was released in the spring of 1986. It produced a Top 40 single in the U.S. with "Hanging on a Heart Attack," which peaked at No. 35 on the Billboard Hot 100. The band's second single, "Who Says," peaked at No. 79. Both of these songs were promoted by music videos which garnered MTV rotation, and both were released as 12" singles with remix and dub versions which received club play. A third single, "Pieces on the Ground" was released as a promo 12" single, while the album peaked at No. 73 on the Billboard 200 chart. The bands fourth and final single was titled "Who's on the Line". It was a remixed version different from the album track timing in at 4:03, however it failed to chart. Mike Chapman produced the album.

History

Better known as a songwriter, Knight started her career with the band Spider during the early 1980s. She wrote hit songs for Pat Benatar, Scandal, Heart, Cheap Trick, Tina Turner and many others. Turner covered Spider's "Better Be Good to Me" for her Private Dancer album, and had a hit single with the song in 1984.

Machine

A machine is a tool containing one or more parts that uses energy to perform an intended action. Machines are usually powered by mechanical, chemical, thermal, or electrical means, and are often motorized. Historically, a power tool also required moving parts to classify as a machine. However, the advent of electronics has led to the development of power tools without moving parts that are considered machines.

A simple machine is a device that simply transforms the direction or magnitude of a force, but a large number of more complex machines exist. Examples include vehicles, electronic systems, molecular machines, computers, television, and radio.

Etymology

The word machine derives from the Latin word machina, which in turn derives from the Greek (Doric μαχανά makhana, Ionic μηχανή mekhane "contrivance, machine, engine", a derivation from μῆχος mekhos "means, expedient, remedy").

A wider meaning of "fabric, structure" is found in classical Latin, but not in Greek usage.

This meaning is found in late medieval French, and is adopted from the French into English in the mid-16th century.

Nav'

The Nawie or Nawki in Polish, the Mavka (Navka, Nyavka, Zalozhnі mertsі) in Ukrainian, or simply Nav' in other Slavic languages are ghosts or the souls of persons that had met a tragic or premature death, particularly unchristened babies. In Slavic mythology, Nawie exist in the underworld called Nawia.

In Ukrainian mythology, Mavka is a type of mermaids with long flaxen hair. The name Mavka derives from Nav’ (Navka), which means "the embodiment of death." Mavky (plural) do not have a full body, have no reflection in water, do not cast shadows, and have no back, and so their insides can be seen.

The traditional view is that Mavky live in the woods of Galicia (Ukraine) and the Carpathians. Mavky symbolize the souls of children who were born dead or died unbaptized. They often appear in the form of beautiful young girls dancing and singing to lure young men into the woods where they would tickle them to death and chop their heads off.

To save a baby's soul, one had to throw up a kerchief during Trinity holidays, say a name and add "I baptize you". A rescued soul would then go to heaven. If a soul lived up to seven years and did not go to heaven, a baby would turn into a mermaid or a Mavka and would haunt people.

NAV

NAV or Nav may refer to:

Organizations

Government agencies

Medicine and biology

Computers

Finance

Places

Transportation

Nav1.7

Na_v1.7 is a sodium ion channel that in humans is encoded by the SCN9A gene. It is usually expressed at high levels in two types of neurons, the nociceptive (pain) neurons at dorsal root ganglion (DRG) and trigeminal ganglion, and sympathetic ganglion neurons, which are part of the autonomic (involuntary) nervous system.

Function

Na_v1.7 is a voltage-gated sodium channel and plays a critical role in the generation and conduction of action potentials and is thus important for electrical signaling by most excitable cells. Na_v1.7 is present at the endings of pain-sensing nerves, the nociceptors, close to the region where the impulse is initiated. Stimulation of the nociceptor nerve endings produces "generator potentials", which are small changes in the voltage across the neuronal membranes. The Na_v1.7 channel amplifies these membrane depolarizations, and when the membrane potential difference reaches a specific threshold, the neuron fires. In sensory neurons, multiple voltage-dependent sodium currents can be differentiated by their voltage dependence and by sensitivity to the voltage-gated sodium-channel blocker tetrodotoxin. The Na_v1.7 channel produces a rapidly activating and inactivating current which is sensitive to the level of tetrodotoxin. Na_v1.7 is important in the early phases of neuronal electrogenesis. Na_v1.7 activity consists of a slow transition of the channel into an inactive state when it is depolarized, even to a minor degree. This property allows these channels to remain available for activation with even small or slowly developing depolarizations. Stimulation of the nociceptor nerve endings produces "generator potentials", small changes in the voltage across the neuronal membranes. This brings neurons to a voltage that stimulate Na_v1.8, which has a more depolarized activation threshold that produces most of the transmembrane current responsible for the depolarizing phase of action potentials.