Unsupervised Frequency Tracking beyond the Nyquist Limit using Markov Chains

Unsupervised K-Nearest Neighbor Regression

Unsupervised target detection in a single IR image frame

Unsupervised Wishart Classifications of Sea-Ice using Entropy, Alpha and Anisotropy Decompositions

Unsuppressed fermion-number violation at high temperature: An O(3) model

UNSWIRF: the University of New South Wales infrared Fabry-Perot

Unusual Bonding Mechanisms in Beryllium Compounds

Unusual properties of bar-within-ring galaxies and the projection effect model for barred spiral galaxies

Unusual properties of conductive rectangular cavities in the zero point electromagnetic field: Resolving forward's Casimir energy extraction cycle paradox

Up-and-Down and the Percentile-Finding Problem

UPAL: Unbiased Pool Based Active Learning

Update and image quality error budget for the LSST camera optical design

Update of the design of the AMTEC converter for use in AMTEC Radioisotope Power Systems

Update on Data Processing with the GBT

Update On STEREO And Other Missions Of The JHU/Applied Physics Laboratory

Update on the NASA GRC Stirling Technology development project

Update on the physics of light pseudoscalar mesons

Updated verification of the Space Weather Prediction Center's solar energetic particle prediction model

Updating Probabilities: A Complex Agent Based Example

Updating Probabilities: An Econometric Example