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The Visitor [1] design pattern is one of the twenty-three well-known Gang of Four design patterns that describe how to solve recurring design problems to design flexible and reusable object-oriented software, that is, objects that are easier to implement, change, test, and reuse.
The single-serving visitor pattern should be used when visitors do not need to remain in memory. This is often the case when visiting a hierarchy of objects (such as when the visitor pattern is used together with the composite pattern) to perform a single task on it, for example counting the number of cameras in a 3D scene.
Two chapters are devoted to analyzing the ways in which visitors navigate the physical space of a museum. Falk and Dierking define the museum experience as "not just the result of interactions with exhibits, but the sum of his constructed personal, social and physical contexts" and go on to further posit that by working together, social and physical contexts create predictable visitor behaviors.
The Visitor-Resident continuum illustrates the range of possible modes of engagement individuals now have available to them through the web. The corresponding Digital Visitors and Residents mapping is a tool used by educators and librarians for exploring how their institutional users are engaging with the services they provide.
V is an American science fiction franchise created by American writer, producer and director Kenneth Johnson about a genocidal invading alien race known as the "Visitors"—reptilian humanoids disguised as human beings—trying to take over Earth, and the human reaction to this, including the Resistance group attempting to stop them, while others collaborate with the aliens for power and ...
V (also known as V: The Series) is an American science fiction television series that aired in the United States on NBC from October 26, 1984, to March 22, 1985. It is a continuation of the V franchise about an alien invasion of Earth by a carnivorous race of reptilians known as "Visitors", which was originally conceived by American writer, producer, and director Kenneth Johnson.
Though the alien "Visitors" claim to come in peace, it transpires that they have been infiltrating the planet for decades, and are planning on enslaving the human species. Parallels have been drawn between the Visitors and US Presidents George W. Bush and Barack Obama, though Peters and co-producer Jeffrey Bell refute that they were intentional ...
In academia, a visiting scholar, visiting scientist, visiting researcher, visiting fellow, visiting lecturer, or visiting professor is a scholar from an institution who visits a host university to teach, lecture, or perform research on a topic for which the visitor is valued. [1]