George H. Williams

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Virtual Reality (VR) has generated much excitement but little formal proof that it is useful. Because VR interfaces are difficult and expensive to build, the computer graphics community needs to be able to predict which applications will benefit from VR. In this paper, we show that users with a VR interface complete a search task faster than users with a(More)
This work extends the metaphor of a see-through interface embodied in Magic Lenses TM to 3D environments. We present two new see-through visualization techniques: flat lenses in 3D and volumetric lenses. We discuss implementation concerns for platforms that have programmer accessible hardware clipping planes and show several examples of each visualization(More)
Alice is a rapid prototyping system used to create three dimensional graphics simulations like those seen in virtual reality applications. Alice uses an interpreted language called Python as its scripting language to implement user actions. This interactive development environment allows users to explore many more design options than is possible in a(More)
We are pleased to present you with the report of the White House Commission on Aviation Safety and Security. You established this Commission by issuing Executive Order 13015 on August 22, 1996 with a charter to study matters involving aviation safety and security, including air traffic control and to develop a strategy to improve aviation safety and(More)
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