in the context of the BEACON, and consist of: i) continued analyses of data and tissue collected as part of a community-based case-control studies of incident Barrett's for which Dr. Vaughan was PI, ii) pooled analyses of data from multiple population-based studies carried out by BEACON investigators, and iii) development of new collaborative research projects within BEACON that take advantage of the diverse populations represented, and existing banks of well-characterized tissues. Dr. Vaughan has a well-established track record of mentoring graduate students and postdoctoral fellows, as well as junior faculty in Epidemiology and related disciplines. He was Co-director of the Environmental Epidemiology Training Grant from 1990-2006;in 2005 he assumed responsibility as Director of the NCI-funded Cancer Epidemiology and Biostatistics Training Grant (T32CA09168). He is a frequent guest lecturermagnetic tracks in which photographic data, including a F-number and a shutter speed, can be magnetically recorded while the film is being advanced or transported.
Typically, two perforations are formed in a leading end portion and in a trailing end portion of each film frame. The APS camera includes a film transport sensing device established for sensing movement of the film by sensing the perforations in the film. The photographic data is then recorded on the magnetic tracks of the exposed frame during movement of the film. Noise, such as chattering noise, arises because of either the inferiority of the film, a mechanical fault, or a spatial complexity. This noise interferes with an output signal which represents the movement of the film, and, consequently, causes magnetic recording errors on