This paper was the response to a challenge set me as the senior historian of chemistry (in age) serving on the ACS National Historic Chemical Landmarks Committee. The challenge was to reflect on the history of chemistry in terms of the question posed in the paper’s title. Although there is a “tongue in cheek” quality to the question, it also has its serious side and it challenged me. I have to ...

background: mitral valve prolapse (mvp) is now recognized as the most common cardiovalvular abnormality (cva) in the usa, but there has been much less agreement about other aspects of its epidemiology, diagnosis and clinical features. cva analysis still relies mainly on the visual assessment of echocardiographic imaging and manual measurements by experienced cardiologists. so, automating or sem...

This paper describes an application of augmented reality (AR) techniques to virtual cultural heritage reconstruction on the real sites of defunct constructs. To realize AR-based cultural heritage reconstruction, extrinsic camera parameter estimation is required for geometric registration of real and virtual worlds. To estimate extrinsic camera parameters, we use a pre-constructed feature landma...

statement of problem: recognition and determination of facial and dental midline is important in dentistry. currently, there are no verifiable guidelines that direct the choice of specific anatomic landmarks to determine the midline of the face or mouth. objectives: the purpose of this study was to determine which of facial anatomic landmarks is closest to the midline of the face as well as tha...

Successful wayfinding requires accurate encoding of two types of information: landmarks and the spatial relations between them (e.g. landmark X is left/north of Y). Although both types of information are crucial to wayfinding, behavioral and neurological evidence suggest that they have different substrates. In this paper, we consider the nature of the difference by examining comprehension times...