John Peabody

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A real-time acquisition and processing architecture has been developed for an ultrawideband (UWB) S-band (24 GHz) multiple-input multiple-output (MIMO) phased array radar system that facilitates greater than 10 Hz imaging rates, providing a video-like radar image of what is behind a concrete wall. Video rate imaging enhances the interpretability of range(More)
Background: Multi-item health status measures can be lengthy, expensive, and burdensome to collect. Single-item measures may be an alternative. We compared measurement properties of two single-item, general self-rated health (GSRH) questions to assess how well they captured information in a validated, multi-item instrument. Methods: We administered a(More)
BACKGROUND Prediction models that identify populations at risk for high health expenditures can guide the management and allocation of financial resources. OBJECTIVE To compare the ability for identifying individuals at risk for high health expenditures between the single-item assessment of general self-rated health (GSRH), "In general, would you say your(More)
a International Food Policy Research Institute, Development Strategy and Governance Division, 2033K Street, NW, Washington, DC 20006, USA b Sanford School of Public Policy, Duke University, Durham, NC 27708-0312, USA c Department of Epidemiology & Biostatistics University of California, 50 Beale Street, Suite 1200, San Francisco, CA 94105, USA d The First(More)
As a group, physicians strive for quality but often resist quality measurement. Cost, inconvenience, lack of time, mistrust of quality measures, and a fear of what assessment may find are all factors contributing to this resistance. However, quality, in both rich and poor counties, continues to be poor at worse and varied at best. If we are to improve the(More)
BACKGROUND Many studies associate health risks with household air pollution from biomass fuels and stoves. Evaluations of stove improvements can suffer from bias because they rarely address health-relevant differences between the households who get improvements and those who do not. METHODS We demonstrate both the potential for bias and an option for(More)
Knock and announce missions occur frequently on the urban battlefield. It would be advantageous to locate all of the humans inside an urban structure and obtain a "head count" prior to action. For this reason, we developed a through-wall radar sensor capable of locating moving targets through concrete-walled structures and of displaying the results (in(More)
BACKGROUND Infantile hypothyroidism, either caused by iodine-deficiency disorder (IDD) or congenital hypothyroidism (CH), is the world's leading cause of preventable mental retardation. Such hypothyroidism has virtually been eliminated in the developed world by salt iodization and neonatal thyroid screening. However, most developing countries do not have(More)
OBJECTIVE To assess the quality of medical treatment by disaggregating quality into components that distinguish between insufficient and unnecessary care. DESIGN Randomly selected doctors were asked how they would treat a sick child. Their responses were disaggregated into how much of an evidence-based essential treatment plan was completed and the number(More)