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1 Abstract In this paper, a novel approach is introduced to define a quantitative measure of closeness between vector fields. The usefulness of this measurement can be seen when comparing computational and experimental flow fields under the same conditions. Furthermore, its applicability can be extended to more cumbersome tasks such as navigating through a(More)
A method for comparing three-dimensional vector fields constructed from simple critical points is described. This method is a natural extension of the previous work [1] which defined a distance metric for comparing two-dimensional fields. The extension to three-dimensions follows the path of our previous work, rethinking the representation of a critical(More)
— As the cost of operations comes under greater scrutiny, the use of automated systems is receiving greater attention. A vital aspect of on-board automation is the manner in which system knowledge and operational procedures are represented. Production rules are a commonly-implemented method. They possess the advantage of coherent, logical formulation of(More)
We recently discovered that C-shaped sub-wavelength (nano) metallic apertures when irradiated at specific resonance frequencies have extraordinary power transmission five to six orders of magnitude beyond what is observed for conventional round or square apertures. These apertures produce optical spot sizes as small as 25-50 nm using visible light in the(More)
As part of its space operations research program, Stanford University's Space Systems Development Laboratory (SSDL) is implementing an automated state of health assessment and notification system for spacecraft. On board the spacecraft, this system consists of software that filters telemetry to derive a health assessment and a periodic beacon that(More)
OBJECTIVE To describe epidemiological and laboratory characteristics of the measles outbreaks recorded in the urban slums of Delhi (designated as high risk areas under the Polio program), from February through July 2014. METHODS As a part of surveillance and containment measures, an extensive field investigation for measles case search (WHO definition)(More)
field topology has received much attention in both the visualization and the physical science communities. However, to our knowledge, almost no work has been done on quantitative measurements for vector-field comparisons. In this sketch, a novel approach is introduced to define a quantitative measure of closeness between vector fields. The usefulness of(More)
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