Dallas Johnson

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BACKGROUND AND PURPOSE Rehabilitation care after stroke is highly variable and increasingly shorter in duration. The effect of therapeutic exercise on impairments and functional limitations after stroke is not clear. The objective of this study was to determine whether a structured, progressive, physiologically based exercise program for subacute stroke(More)
PURPOSE This study examined the relationship between depressive symptoms and time courses in achieving independence in basic activities of daily living (BADL) and instrumental activities of daily living (IADL). METHODS At baseline, 1, 3, and 6 months after stroke, 459 stroke patients were prospectively assessed. We used the Geriatric Depression Scale to(More)
Forty female clerical workers were randomly assigned to a control condition or to 3-hr exposure to low-intensity noise designed to simulate typical open-office noise levels. The simulated open-office noise elevated workers' urinary epinephrine levels, but not their norepinephrine or cortisol levels, and it produced behavioral aftereffects (fewer attempts at(More)
Decomposition of white birch (Betula papyrifera Marshall) foliar litter was examined at metal-contaminated and uncontaminated sites established along gradients of soil Cu, Ni, Pb and Zn concentrations near Sudbury, Ontario and Rouyn-Noranda, Quebec. Over an 18-month study period, a significantly lower rate of litter mass loss was observed at the Sudbury(More)
Consumers engage in food handling practices that can contribute to foodborne illness, and there is interest in improving those behaviors. The purpose of this study was to determine the impact of the “Food Safe Families” clean and separate messages on cross-contamination behaviors of consumers and to determine the impact of external safe food handling cues.(More)
This paper presents a 12 bit split-array switched-capacitor power amplifier (SA-SCPA) to improve resolution of an SCPA and hence the linear dynamic range. An attenuation capacitor added between two sub-arrays allows a smaller ratio between the smallest and largest capacitors in the array, accommodating better matching. To compromise between efficiency and(More)
The purpose of this study was to determine if breakfast macronutrient composition improved thermic effect of feeding (TEF) and appetite after a one-week adaptation in young women who habitually skip breakfast. A randomized, controlled study was conducted in females (24.1 ± 2 years), who skip breakfast (≥5 times/week). Participants were placed into one of(More)
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