BACKGROUND The objective of our study was to describe factors associated with repeat workers' compensation claims and to compare the work disability arising in workers with single and multiple compensation claims. METHODS All initial injury claims lodged by persons of working age during a five year period (1996 to 2000) and any repeat claims were extracted from workers' compensation administr...

Manufacturing and product design are grounded in the physical world. The entire product lifecycle involves a wide range of integrated tasks that focus on the properties of physical objects, beginning with begins with the design of physical objects and the specification of the materials from which the physical objects are made. Thus, reasoning tasks within manufacturing and product design requir...

E. D. Fackerell claims: 1) that Alley and Yılmaz treatment of parallel slabs in general relativity is wrong because the Yılmaz metric used is not a solution of the field equations of general relativity; 2) he also claims that the correct treatment of the parallel slab problem in general relativity must be based on the so-called Taub metric. We show below that both of Fackerell's claims are fals...

The focus of the first part of the thesis commences with an examination of two pages in Ramanujan’s lost notebook, pages 336 and 335. A casual, or even more prolonged, examination of the strange formulas on these pages does not lead one to conclude that they are related to one another. Moreover, it does not appear that they have any relationships with other parts of mathematics. On page 336 in ...

Gould’s Structure of Evolutionary Theory argues that Darwinism has undergone significant revision. Although Gould succeeds in showing that hierarchical approaches have expanded Darwinism, his critique of adaptationism is less successful. Gould claims that the ubiquity of developmental constraints and spandrels has forced biologists to soften their commitment to adaptationism. I argue that Gould...

Do such episodes occur randomly, or is there a pattern to claims’ failure to predict employment fluctuations? This edition of Current Issues compares the accuracy of a simple forecasting model that incorporates initial claims with the accuracy of a forecasting model that excludes initial claims. Interestingly, we find that the reliability of claims in predicting employment fluctuations depends ...

To meet Sean Carroll on his home turf in the early spring of Wisconsin is like encountering a bear cuddled up in his lair, waiting out the cold winter. I burrowed into the softly lit cave of small offices, with stalactites of yellow post-its dripping from every imaginable surface. Tiptoeing over misaligned stacks of books and reprints, I had to resist the urge to pick up one of the worn works, ...