Jennifer C. Romano Bergstrom

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Two experiments utilizing a total of 530 pigs were conducted to evaluate the effects of commercial enzymes in diets containing dried distillers grains with solubles (DDGS) on nursery pig growth performance. In Exp. 1, 180 pigs (initially 19.9 lb) were used in a 27-d growth trial to compare the effects of Easy-zyme, Hemicell-W, and Porzyme in diets(More)
Eye movement deficiencies are inherent with age and tend to increase in distracting visual fields, in the useful field of view (UFoV), and when information is located in the periphery. Despite well-known age-related differences in eye movement, there has been limited empirical study into how older adults look at Web sites. The study of eye movement during(More)
In a usability study on a portion of the Census Bureau Web site, we assess how people of different ages search for specific information by evaluating performance and strategy differences between age groups. We collected us-ability metrics of accuracy and efficiency, including mouse click data. Eye-tracking data were also collected including eye-movement(More)
The adoption of a new technology is often affected by its perceived utility and ease of use, both of which could vary by age due to cognitive differences. A recently invented technology, the quick response (QR) code, enables smartphone users to access content on their mobile devices by scanning two-dimensional barcodes. In this paper, we examine awareness,(More)