James Ralston

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BACKGROUND People with chronic obstructive pulmonary disease (COPD) continue to experience dyspnea with activities of daily living (ADL) despite optimal medical management. Information and communication technologies may facilitate collaborative symptom management and could potentially increase the reach of such interventions to those who are unable to(More)
Two experiments were carried out to investigate the roles of joint accent structure and familiarity in delayed recognition of relatively long tonal melodies. Melodic themes of target melodies were defined by correlating contour-related pitch accents with temporal accents (accent coupling) during an initial familiarization phase. Later, subjects gave(More)
BACKGROUND Middle class populations have supported shared medical records, including Internet-accessible medical records. The attitudes of lower income populations, and of physicians, are less clear. OBJECTIVES The objective of this study was to compare the attitudes toward shared outpatient medical records among (1) socioeconomically disadvantaged(More)
Gaussian beams are approximate solutions to hyperbolic partial differential equations that are concentrated on a curve in space-time. In this paper, we present a method for computing the stationary in time wave field that results from steady air flow over topography as a superposition of Gaussian beams. We derive the system of equations that governs these(More)
Computation of high frequency solutions to wave equations is important in many applications, and notoriously difficult in resolving wave oscillations. Gaussian beams are asymptotically valid high frequency solutions concentrated on a single curve through the physical domain, and superposition of Gaussian beams provides a powerful tool for generating more(More)
BACKGROUND Patient satisfaction has not been widely studied with respect to implementation of the electronic medical record (EMR). There are few reports of the impact of the EMR in pediatrics. OBJECTIVE The objective of this study was to assess the impact of implementation of an electronic medical record system on families in an academic pediatric(More)
Computation of high frequency solutions to wave equations is important in many applications, and notoriously difficult in resolving wave oscillations. Gaussian beams are asymptotically valid high frequency solutions concentrated on a single curve through the physical domain, and superposition of Gaussian beams provides a powerful tool to generate more(More)
BACKGROUND As minimally invasive cardiac and vascular procedures are on the rise, the incidence of iatrogenic acute aortic dissection (IAAD) will increase. Cardiovascular professionals should be aware about the risk factors, means of prevention and best management options for IAAD in the perioperative setting. CASE PRESENTATION We present the successful(More)