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121.
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Ticoş CM Wang Z Wurden GA Kline JL Montgomery DS Dorf LA Shukla PK 《Physical review letters》2008,100(15):155002
Simultaneous acceleration of hundreds of dust particles to hypervelocities by collimated plasma flows ejected from a coaxial gun is demonstrated. Graphite and diamond grains with radii between 5 and 30 microm, and flying at speeds up to 3.7 km/s, have been recorded with a high-speed camera. The observations agree well with a model for plasma-drag acceleration of microparticles much larger than the plasma screening length. 相似文献
123.
Cottrell K Holyoke CW Kline M Lee KC Nassirpour MR Pasteris RJ Shah S 《Combinatorial chemistry & high throughput screening》2005,8(7):617-622
A novel class of highly active dihydropyridine miticides was prepared using a multicomponent reaction process. The initial lead was rapidly optimized using solution phase parallel synthesis techniques and a positional scanning approach. Detailed structure-activity relationships were developed for the amino and carbonyl components of the molecule and used to select the best candidates for broad field testing. The chemistry, biology and toxicology of these compounds will be presented along with numerous structural variants of the reaction products. 相似文献
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In anisotropic media, the direction of energy propagation does not necessarily coincide with the wave normal, i.e. the energy flux vector does not coincide with the wave normal. Since, experimentally, one measures group velocity not phase velocity, one must therefore be careful in interpreting ultrasonic wave speed measurements in anisotropic media. This is of particular importance in elastic property reconstruction where acoustic velocity measurements are used as the basis for determining anisotropic material properties. In this work, the consequences of energy flux deviation from the wave normal are considered for typical experimental geometries. Particular attention is devoted to developing appropriate relationships between the phase velocity and ultrasonic transit time measurements, as these relations are most useful for elastic property reconstruction. In all the cases considered, it is shown that the phase velocity can be directly calculated from appropriate time delay measurements. 相似文献
126.
This paper is the first of three papers on a refined internal strainwire technique. Availability of sensitive data-acquisition equipment has made possible a detailed investigation that resulted in reductions in both gage length and excitation voltage with little reduction in the quality of the information. The method of measuring internal strains by embedded lengths of strain-gage wire has been extended to the construction and evaluation of strain rosettes. Experimentally measured principal strains on an interior plane of a compressed square prism are comared for statistical and theoretical consistency. 相似文献
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Kenneth A. Kline Stuart J. Allen 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1968,19(6):898-905
Zusammenfassung Das vonAllen, DeSilva undKline [1] vorgeschlagene Kontinuumsmodell richtungsorientierter Flüssigkeiten wird auf die TheorieEricksens [2, 3] undHands [4] zurückgeführt. Es wird die Suspension fester Drehkörper in Flüssigkeiten und solche sphärischer Partikel unter elastischer Verformung behandelt. 相似文献
130.
25- and 26-monofluorophytosterols were synthesized from stigmasterol as potential arthropod-activated competitive inhibitors of side chain hydroxylations occuring in ecdysone biogenesis. 相似文献