Signal (Kanon Wakeshima song)

"Signal" is the fourth single released by Japanese singer and cellist Kanon Wakeshima, and second single from her album, Tsukinami. The song "Signal" was used as the ending of the anime TV series Strike the Blood. The song reached #54 on the Oricon Singles Chart and stayed on the chart for two weeks.

Track listing

Personnel

References

Signal (novel)

Signal is a 2009 children's science fiction novel by Cynthia DeFelice. The book was a Junior Library Guild selection for 2009. The novel is about a boy who is bored with his new life in upstate New York and discovers a girl who claims to be from another planet, who has been kidnapped by an abusive couple, and attempts to make a signal to contact her home planet.

Synopsis

Railway signal

A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to train/engine drivers (engineers in the US). The driver interprets the signal's indication and acts accordingly. Typically, a signal might inform the driver of the speed at which the train may safely proceed or it may instruct the driver to stop.

Application and positioning of signals

Originally, signals displayed simple stop/proceed indications. As traffic density increased, this proved to be too limiting and refinements were added. One such refinement was the addition of distant signals on the approach to stop signals. The distant signal gave the driver warning that he was approaching a signal which might require a stop. This allowed for an overall increase in speed, since train drivers no longer had to drive at a speed within sighting distance of the stop signal.

Under timetable and train order operation, the signals did not directly convey orders to the train crew. Instead, they directed the crew to pick up orders, possibly stopping to do so if the order warranted it.

Prototype

A prototype is an early sample, model, or release of a product built to test a concept or process or to act as a thing to be replicated or learned from. It is a term used in a variety of contexts, including semantics, design, electronics, and software programming. A prototype is designed to test and try a new design to enhance precision by system analysts and users. Prototyping serves to provide specifications for a real, working system rather than a theoretical one. In some workflow models, creating a prototype (a process sometimes called materialization) is the step between the formalization and the evaluation of an idea.

The word prototype derives from the Greek πρωτότυπον prototypon, "primitive form", neutral of πρωτότυπος prototypos, "original, primitive", from πρῶτος protos, "first" and τύπος typos, "impression".

Basic prototype categories

Prototypes explore different aspects of an intended design: