Results 261 to 270 of about 41,682 (296)

Electrohydrodynamic Deposition of Polymeric Droplets under Low-Frequency Pulsation

Langmuir, 2011
Circularly shaped polymeric droplets with diameter of about 20 μm have been intermittently ejected and deposited in an orderly manner on a collector from a syringe needle by means of near-field, electrohydrodynamic reactions using pulsating voltages at around 2.25 kV.
Xu, L., Wang, X., Lei, T. P., Sun, D. H., Lin, L. W.   +4 more
openaire   +3 more sources

Jetting frequency vs voltage frequency in the low-frequency pulsation mode of electrohydrodynamic printing

2010 IEEE 5th International Conference on Nano/Micro Engineered and Molecular Systems, 2010
The low-frequency pulsation mode is caused by an imbalance between the emission rate and supply rate of the liquid in Taylor cone volume. This imbalance leads to the contraction of the cone volume during the jetting of the liquid. The liquid could jet after the turn-on of a pulse voltage because of an exertion of electric force on the liquid meniscus ...
null Lei Xu, null Xiang Wang, null Yongfang Huang, null Daoheng Sun, null Liwei Lin   +4 more
openaire   +1 more source

Theory of medium-frequency pulsating-field machines

Proceedings of the Institution of Electrical Engineers, 1964
A new method is shown for calculating the complete, including peak, characteristics of the pulsating-field machine. It provides the open-circuit, short-circuit and on-load characteristics. The Guy-type generator is analysed. The relations obtained are as simple as any of those known for common industrial-frequency generators.
openaire   +1 more source

Frequency limits for gas flow pulsation damping criteria

Transactions of the Institute of Measurement and Control, 1984
The accuracy of most flowmeters is seriously affected by pulsations, and these must be damped before reliable measurements can be achieved. Damping criteria based on the Hodgson Number have been used for many years in flow measurements made with differential pressure-type flow meters.
R.C. Mottram, W.A. Mohammad
openaire   +1 more source

DRIFT EFFECTS IN ULTRA-LOW-FREQUENCY GEOMAGNETIC PULSATIONS

LIFE OF THE EARTH, 2022
Previously, when analyzing ULF variations of the natural electromagnetic fi according to observations in the Borok and Mondy observatories, separated by 60 degrees of longitude, longitudinal effects of geomagnetic Pc1 pulsations («pearls») were revealed.
openaire   +1 more source

Ultralow-frequency pulsations: Earth and Jupiter compared

Advances in Space Research, 1995
Abstract Ultra-low frequency pulsations are one of the most important signatures of magnetospheric dynamics. Numerous observations of these waves have been reported with respect to the Earth magnetosphere, which led to a very detailed understanding of these waves. Some observations of ULF pulsations in the Jovian magnetosphere have been reported too.
openaire   +1 more source

PC1 with a broad frequency spectrum — “Goose pulsations”

Studia Geophysica et Geodaetica, 2009
Geomagnetic pulsations in the frequency range of Pc1 pearl waves with the dynamic spectra having a very narrow spectrum width at the beginning of the event and a very broad spectrum width (Δf/f0 ∼ 1) in the later part of the event are analyzed. One of the observed events shown by the dynamic spectrum resembles a goose with the beak at the beginning of ...
Felix Z. Feygin, Karel Prikner, Jorma Kangas   +2 more
openaire   +1 more source

Low-frequency spatial-pattern pulsations in a laser

OSA Annual Meeting, 1993
We have observed in a He-Xe laser that its multimode spatial pattern can pulse at frequencies much less than the frequency spacing between the transverse modes of the cavity.
H. Lin, N. B. Abraham
openaire   +1 more source

High-frequency hydraulic pulsator SU 1009

Measurement Techniques, 1970
A. P. Pleshko, Yu. N. Kashirin, N. A. Pankusov   +2 more
openaire   +1 more source

A comprehensive review of pulsating flow on heat transfer enhancement

Applied Thermal Engineering, 2021
Yonghai Zhang, Jinjia Wei
exaly