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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)
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)
Extramammary Paget's disease (EMPD) is a rare malignant neoplasm with a predilection for the apocrine-rich anogenital skin and less commonly for the axilla. The tumor rarely occurs in non-apocrine bearing regions where it is referred to as ectopic EMPD. Here, we report a case of a patient that presented with a poorly circumscribed, erythematous plaque with(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 asymptoti-cally 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)
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)
In this work we construct Gaussian beam approximations to solutions of the high frequency Helmholtz equation with a localized source. Under the assumption of non-trapping rays we show error estimates between the exact outgoing solution and Gaussian beams in terms of the wave number k, both for single beams and superposition of beams. The main result is that(More)