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.

Error (baseball)

In baseball statistics, an error is an act, in the judgment of the official scorer, of a fielder misplaying a ball in a manner that allows a batter or baserunner to advance one or more bases or allows an at bat to continue after the batter should have been put out.

The term error can also refer to the play during which an error was committed.

Relationship to other statistical categories

An error does not count as a hit but still counts as an at bat for the batter unless, in the scorer's judgment, the batter would have reached first base safely but one or more of the additional base(s) reached was the result of the fielder's mistake. In that case, the play will be scored both as a hit (for the number of bases the fielders should have limited the batter to) and an error. However, if a batter is judged to have reached base solely because of a fielder's mistake, it is scored as a "hit on error," and treated the same as if a batter was put out, hence lowering his batting average.

Error message

An error message is information displayed when an unexpected condition occurs, usually on a computer or other device. On modern operating systems with graphical user interfaces, error messages are often displayed using dialog boxes. Error messages are used when user intervention is required, to indicate that a desired operation has failed, or to relay important warnings (such as warning a computer user that they are almost out of hard disk space). Error messages are seen widely throughout computing, and are part of every operating system or computer hardware device. Proper design of error messages is an important topic in usability and other fields of human–computer interaction.

Common error messages

The following error messages are commonly seen by modern computer users:

Infamous error messages

Abort, Retry, Fail? - A notoriously confusing error message seen in MS-DOS

An example of an Error message .vbs script

HTTP 403

A web server may return a 403 Forbidden HTTP status code in response to a request from a client for a web page or resource to indicate that the server can be reached and understood the request, but refuses to take any further action. Status code 403 responses are the result of the web server being configured to deny access, for some reason, to the requested resource by the client.

A typical request that may receive a 403 Forbidden response is a GET for a web page, performed by a web browser to retrieve the page for display to a user in a browser window. The web server may return a 403 Forbidden status for other types of requests as well.

The Apache web server returns 403 Forbidden in response to requests for url paths that correspond to filesystem directories, when directory listings have been disabled in the server and there is no Directory Index directive to specify an existing file to be returned to the browser. Some administrators configure the Mod proxy extension to Apache to block such requests, and this will also return 403 Forbidden. Microsoft IIS responds in the same way when directory listings are denied in that server. In WebDAV, the 403 Forbidden response will be returned by the server if the client issued a PROPFIND request but did not also issue the required Depth header, or issued a Depth header of infinity.