A robust motion estimation and segmentation approach to represent moving images with layers

The paper provides a robust representation of moving images based on layers. To that goal, we have designed efficient motion estimation and segmentation techniques by affine model fitting suitable for the construction of layers. Layered representations, originally introduced by Wang and Adelson (see IEEE Transactions on Image Processing, vol.3, no.5, p.625-38, 1994) are important in several applications. In particular they are very appropriate for object tracking, object manipulation and content-based scalability which are among the main functionalities of the future MPEG-4 standard. In addition a variety of examples are provided that give a deep insight into the performance bounds of the representation of moving images using layers.Peer ReviewedPostprint (published version

Catalysis of hydrogen-atom recombination in rocket nozzles

Oxygen and oxygen-nitrogen mixtures as catalysts for hydrogen atom recombination in rocket nozzle

Estimates of nonequilibrium ionization phenomena in the inviscid Apollo plasma sheath

Nonequilibrium ionization in asymmetric plasma sheath determined for Apollo spacecraft at superorbital velocity reentr

Gender patterns in dress and outward appearance: an individual choice or fulfillment of cultural expectations?

This study examines the extent to which males and females conform to gender schemas regarding outward appearance and clothing styles. Participants were observed from a distance in various natural settings and were coded based on estimated age, hair length, certain clothing choices, and certain jewelry and accessory choices. We found statistically significant gender differences (with p \u3c.0001) for all characteristics, with the codes for hair length, earrings, and dresses showing the strongest discrepancies. These data showed a pattern of males being more confined to strict gender displays than were females, which can be seen particularly clearly in the wearing of earrings and dresses, as males rarely deviated from the socially acceptable gender signals. These findings imply that the feminist movement loosened feminine standards for dress and appearance; lacking a similar social movement, men remain more strictly confined to traditional displays of gender

Time-division SQUID multiplexers with reduced sensitivity to external magnetic fields

Time-division SQUID multiplexers are used in many applications that require exquisite control of systematic error. One potential source of systematic error is the pickup of external magnetic fields in the multiplexer. We present measurements of the field sensitivity figure of merit, effective area, for both the first stage and second stage SQUID amplifiers in three NIST SQUID multiplexer designs. These designs include a new variety with improved gradiometry that significantly reduces the effective area of both the first and second stage SQUID amplifiers.Comment: 4 pages, 7 figures. Submitted for publication in the IEEE Transactions on Applied Superconductivity, August 201

Strongly quadrature-dependent noise in superconducting micro-resonators measured at the vacuum-noise limit

We measure frequency- and dissipation-quadrature noise in superconducting lithographed microwave resonators with sensitivity near the vacuum noise level using a Josephson parametric amplifier. At an excitation power of 100~nW, these resonators show significant frequency noise caused by two-level systems. No excess dissipation-quadrature noise (above the vacuum noise) is observed to our measurement sensitivity. These measurements demonstrate that the excess dissipation-quadrature noise is negligible compared to vacuum fluctuations, at typical readout powers used in micro-resonator applications. Our results have important implications for resonant readout of various devices such as detectors, qubits and nano-mechanical oscillators.Comment: 13 pages, 4 figure