Virtual reality
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Virtual reality (VR) is a simulated experience that employs 3D near-eye displays and pose tracking to give the user an immersive feel of a virtual world. Applications of virtual reality include entertainment, education and business. VR is one of the key technologies in the reality-virtuality continuum. As such, it is different from other digital visualization solutions, such as augmented virtuality and augmented reality.
An operator controlling The Virtual Interface Environment Workstation (VIEW) at NASA Ames
Researchers with the European Space Agency in Darmstadt, Germany, equipped with a VR headset and motion controllers, demonstrating how astronauts might use virtual reality in the future to train to extinguish a fire inside a lunar habitat
An Omni treadmill being used at a VR convention
A Missouri National Guardsman looks into a VR training head-mounted display at Fort Leonard Wood in 2015.
Simulation
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A simulation is an imitative representation of a process or system that could exist in the real world. In this broad sense, simulation can often be used interchangeably with model. Sometimes a clear distinction between the two terms is made, in which simulations require the use of models; the model represents the key characteristics or behaviors of the selected system or process, whereas the simulation represents the evolution of the model over time. Another way to distinguish between the terms is to define simulation as experimentation with the help of a model. This definition includes time-independent simulations. Often, computers are used to execute the simulation.
Human-in-the-loop simulation of outer space
Motorcycle simulator of Bienal do Automóvel exhibition, in Belo Horizonte, Brazil
3DiTeams learner is percussing the patient's chest in virtual field hospital.
Car racing simulator