Results 201 to 210 of about 180,862 (235)

Direct cardiac compression devices

The Journal of Heart and Lung Transplantation, 2002
Ventricular assist devices employed clinically to assist the failing heart require direct contact between the device and the patient's blood. Thromboembolic events, the need for anticoagulation, hemolysis, immune reactions and infections contribute significantly to morbidity and mortality of these devices.
Mehmet C, Oz, John H, Artrip, Daniel, Burkhoff   +2 more
openaire   +2 more sources

Direct Compression of Piracetam

Drug Development and Industrial Pharmacy, 1987
AbstractIt is demonstrated that piracetam undergoes plastic deformation during compression. Incorporation of magnesium stearate dramatically reduces the mechanical strength of the tablets. This effect is much less pronounced when using glyceryl behenate as a lubricating agent.Silicon dioxide on the contrary increases to a great extent the tensile ...
P. Van Aerde, P. Pimhatavioot, R. Synave, Van Severen   +3 more
openaire   +1 more source

Compressibility-Near-Zero Directive Sound

2020 Fourteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials), 2020
A hallmark of a near-zero-index material is its constancy of field amplitude and phase as waves propagate with static-like properties in these materials. This feature has been exploited in electromagnetics for several applications, including for the realization of compact highly directive antennas illuminated by a single source.
C. Rasmussen, A. Alu
openaire   +1 more source

Compressive direction-finding antenna array

2016 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), 2016
The theory of compressive sensing (CS) has inspired the concept of a compressive direction-finding (DF) antenna array where N antenna elements are combined into M measurements before sampling with expected performance similar to that of a conventional N-element array, given that the number of directions of arrival (DoAs) is sufficiently small.
H. E. A. Laue, W. P. du Plessis
openaire   +1 more source

Directional image compression with brushlets

Proceedings of Third International Symposium on Time-Frequency and Time-Scale Analysis (TFTS-96), 2002
We construct a new adaptive basis that provide precise frequency localization and good spatial localization. We develop a compression algorithm that exploits this basis to obtain the most economical representation of the image in terms of textured patterns with different orientations, frequencies, sizes, and positions.
F.G. Meyer, R.R. Coifman
openaire   +1 more source

Prediction-Directed Compression of POMDPs

2008 Seventh International Conference on Machine Learning and Applications, 2008
High dimensionality of belief space in partially observable Markov decision processes (POMDPs) is one of the major causes that severely restricts the applicability of this model. Previous studies have demonstrated that the dimensionality of a POMDP can eventually be reduced by transforming it into an equivalent predictive state representation (PSR). In
Boularias, A., Izadi, M., Chaib-Draa, B.
openaire   +2 more sources

Compressive frequency-difference direction-of-arrival estimation

The Journal of the Acoustical Society of America, 2023
Direction-of-arrival estimation is difficult for signals spatially undersampled by more than half the wavelength. Frequency-difference beamforming [Abadi, Song, and Dowling (2012). J. Acoust. Soc. Am. 132, 3018–3029] offers an alternative approach to avoid such spatial aliasing by using multifrequency signals and processing them at a lower frequency ...
Jeung-Hoon Lee, Yongsung Park, Peter Gerstoft   +2 more
openaire   +2 more sources

Direct compression characteristics of xylitol

International Journal of Pharmaceutics, 1990
Abstract A study of the compaction characteristics of xylitol, a naturally occurring non-cariogenic sugar alcohol, employed as a sweetener in tableting has been made, using a wide range of compression speeds (24–850 mm/s). Heckel analysis, radial tensile strength, elastic recovery, net compaction energy and the compaction force/tensile strength ...
J.S.M. Garr, M.H. Rubinstein
openaire   +1 more source

Anhydrous Lactose in Direct Tablet Compression

Journal of Pharmaceutical Sciences, 1966
The use of anhydrous lactose U.S.P. XVII, tablet grade, as a diluent in direct tablet compression was investigated. It was found that it possesses excellent tableting properties and can be run on a high-speed tablet machine. The placebo and active tablets produced were not affected by elevated temperatures, high humidity, and direct sunlight.
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Application of Glueonolaetone in Direct Tablet Compression

Journal of Pharmaceutical Sciences, 1977
Gluconolactone was evaluated as an excipient for tablets prepared by direct compression using various drugs known to be difficult to compress. The physical properties of the tablets were evaluated after compression and after storage and were satisfactory.
S S, Nasir, L O, Wilken, B, Akhtar
openaire   +2 more sources