OBJECTIVE In this study, we compared how users locate physical and equivalent three-dimensional images of virtual objects in a cave automatic virtual environment (CAVE) using the hand to examine how human performance (accuracy, time, and approach) is affected by object size, location, and distance. BACKGROUND Virtual reality (VR) offers the promise to flexibly simulate arbitrary environments ...

The language of patent claims differs from ordinary language to a great extent, which results in the fact that tools especially adapted to patent language are needed in patent processing. In order to evaluate these tools, manually annotated patent corpora are necessary. Thus, we constructed a corpus of English language pharmaceutical patents belonging to the class A61K, on which several layers ...

We have evaluated the performance of manually operated sampler pipets. Twenty-four instruments of various construction, manufacture, and delivery volume were evaluated. Pipet-delivered water and serum were repeatedly weighed under controlled environmental conditions, and precision and accuracy assessed. The pipets often failed to meet the manufacturer’s stated tolerance limits. Consumers should...

A sterotaxic device for experimental surgery in enucleated eyes is described. This instrument is made entirely of plastic, is inexpensive to make, and has proved to be an invaluable help in teaching microsurgical procedures to ophthalmic residents.