Nonlinear Dynamics in experimental devices with compressed/expanded surfactant monolayers

A theory is provided for a common experimental set up that is used to measure surface properties in surfactant monolayers. The set up consists of a surfactant monolayer (over a shallow liquid layer) that is compressed/expanded in a periodic fashion by moving in counter-phase two parallel, slightly immersed solid barriers, which vary the free surface area and thus the surfactant concentration. The simplest theory ignores the fluid dynamics in the bulk fluid, assuming spatially uniform surfactant concentration, which requires quite small forcing frequencies and provides reversible dynamics in the compression/expansion cycles. In this paper, we present a long-wave theory for not so slow oscillations that assumes local equilibrium but takes the fluid dynamics into account. This simple theory uncovers the physical mechanisms involved in the surfactant behavior and allows for extracting more information from each experimental run. The conclusion is that the fluid dynamics cannot be ignored, and that some irreversible dynamics could well have a fluid dynamic origin

Estimation of Symmetric Channels for Discrete Cosine Transform Type-I Multicarrier Systems: A Compressed Sensing Approach

The problem of channel estimation for multicarrier communications is addressed. We focus on systems employing the Discrete Cosine Transform Type-I (DCT1) even at both the transmitter and the receiver, presenting an algorithm which achieves an accurate estimation of symmetric channel filters using only a small number of training symbols. The solution is obtained by using either matrix inversion or compressed sensing algorithms. We provide the theoretical results which guarantee the validity of the proposed technique for the DCT1. Numerical simulations illustrate the good behaviour of the proposed algorithm.

A method for constructing compressed parsers for a parser generating system /

Thesis (M. S.)--University of Illinois at Urbana-Champaign.

Buckling of uniformly compressed steel plates in the strain-hardening range.

"This work has been carried out as part of an investigation sponsored jointly by the Welding Research Council and the Department of the Navy with funds furnished by the following: American Institute of Steel Construction [and others]."

A compressed view of the points to be discussed, in treating with the United States of America; A.D. 1814 : With an appendix and two maps.

Appendix: On the conduct of the government of the United States towards the Indian tribes: p. [27]-39.

Designing experiments in use of flexitime and compressed work schedules.

"February, 1981."

Proposed adoption of a four-day, forty-hour workweek, without payment of time and one-half overtime compensation for work days exceeding eight hours.

Reproduction of typescript.

Compressed air handbook; a reference book on all phases of industrial air and gas compressors and compressed-air-powered portable tools and rock drills used by industry.

Mode of access: Internet.

Basic workweek of federal firefighters : hearing before the Subcommittee on Human Resources of the Committee on Post Office and Civil Service, House of Representatives, Ninety-sixth Congress, first session, on H.R. 2748 ... September 14, 1979.

"Serial no. 96-113."

Compressed air.

Title from cover.

Compressed air magazine.

Mode of access: Internet.

Pressure vessel design; effects of pressurizing. Presented at the annual meeting of the Compressed Gas Association, New York, N. Y., January 23-24, 1950.

Cover title.

Compressed air magazine.

Mode of access: Internet.

Compressed air energy storage in Illinois : a study and report /

Cover title.

The Drama's vindication, or, The Roman actor : compressed from Massinger's celebrated play of the same name.

First produced at the Drury Lane Theatre, June 3, 1822--Verso of t.p.