Universal quantum information compression and degrees of prior knowledge

We describe a universal information compression scheme that compresses any pure quantum i.i.d. source asymptotically to its von Neumann entropy, with no prior knowledge of the structure of the source. We introduce a diagonalisation procedure that enables any classical compression algorithm to be utilised in a quantum context. Our scheme is then based on the corresponding quantum translation of the classical Lempel-Ziv algorithm. Our methods lead to a conceptually simple way of estimating the entropy of a source in terms of the measurement of an associated length parameter while maintaining high fidelity for long blocks. As a by-product we also estimate the eigenbasis of the source. Since our scheme is based on the Lempel-Ziv method, it can be applied also to target sequences that are not i.i.d.Comment: 17 pages, no figures. A preliminary version of this work was presented at EQIS '02, Tokyo, September 200

EXPERIMENTAL PANEL FLUTTER RESULTS FOR SOME FLAT AND CURVED TITANIUM SKIN PANELS AT SUPERSONIC SPEEDS

Panel flutter results for flat and curved titanium skin panels at supersonic spee

Jon K. Presnell to James (2 October 1962)

https://egrove.olemiss.edu/mercorr_pro/1505/thumbnail.jp

Local Law Enforcement\u27s Counter Terrorism Capabilities.

The purpose of this study was to analyze local law enforcement\u27s counter-terrorism capabilities as it relates to the varying size of United States local law enforcement agencies. Data for the study came from a study entitled Impact of Terrorism on State and Local Law Enforcement Agencies and Criminal Justice Systems in the United States, 2004 . Statistical analysis revealed that there are large disparities in the allocation of resources to intelligence gathering, analyzing, and sharing between smaller local law enforcement agencies and their larger counterparts. Furthermore, smaller agencies are not interacting with federal agencies in a manner consistent with the interactions between larger agencies and federal authorities. However, the study did reveal officers in smaller local law enforcement agencies have undertaken the duties of homeland security on a level commensurate with those in larger local law enforcement agencies