2 Paul Sheppard 2009-09-11T13:00:00-07:00 382 Institute of Physical Geography, University of Freiburg, Germany Professor Rudiger Glaser 2009-09-11T12:00:00-07:00 2009-08-25T11:49:22-07:00 1 2 2009-09-23T13:00:00-07:00 400 Paul Sheppard Department of Geography, University of Wales, Swansea Dr. Roderick Bale 2009-09-23T12:00:00-07:00 2009-09-17T10:03:13-07:00 1 2 Presentation of methodology (year-ring widths and isotopes) and of first results of a pilot study. 2009-10-07T13:00:00-07:00 407 Paul Sheppard PhD Student, Institute of Silviculture, Albert-Ludwig University of Freiburg/Germany Julia Sohn, M.Sc. Forest Sciences 2009-10-07T12:00:00-07:00 2009-09-25T08:32:28-07:00 1 1 2 Paul Sheppard 2009-10-14T13:00:00-07:00 387 LTRR Grad Students 2009-10-14T12:00:00-07:00 2009-09-14T12:03:48-07:00 1 2 RingFinder is a Windows-based computer program that uses operator-supervised image analysis to rapidly identify and measure tree rings. High-resolution images are obtained by scanning wood samples on ordinary office flatbed scanners. The system identifies ring boundaries and measures ring widths semiautomatically, but requires control and confirmation by a trained dendrochronologist or technician. Ring widths are corrected to account for variations in geometrical orientation of ring boundaries. The operator visually inspects and edits the results, and can graphically adjust several search parameters to improve the ability of the program to find and measure rings, and to eliminate the detection of spurious rings. 2009-12-02T13:00:00-07:00 414 Paul Sheppard PhD Graduate of LTRR, Currently instructor at Pima Community College Dr. Alex McCord 2009-12-02T12:00:00-07:00 2009-10-29T13:33:38-07:00 1