Results 221 to 230 of about 145,394 (269)

Persistent-Current Measurements of the Superfluid Density and Critical Velocity

Physical Review A, 1972
Gyroscopic measurements of superfluid persistent currents in liquid helium below and near the $\ensuremath{\lambda}$ transition are presented here. Measurements were conducted in a variety of sizes of porous material from 0.05- to 150-\ensuremath{\mu}average size.
James R. Clow, John D. Reppy
openaire   +1 more source

Water Current Velocity Measurements by a Magnetometer-Based Tilt

2024 IEEE 67th International Midwest Symposium on Circuits and Systems (MWSCAS)
5
Juan Montiel-Caminos, Nieves G. Hernandez-Gonzalez, Javier Sosa, Juan A. Montiel-Nelson   +3 more
openaire   +2 more sources

Combined measurements of velocity and concentration in experimental turbidity currents

Sedimentary Geology, 2005
Abstract Three different sets of experimental turbidity currents were run in which velocity and concentration were measured simultaneously, for several different heights above the bed. One set with cohesive sediment had an initial volumetric concentration of 16% kaolinite, and the other two sets with non-cohesive sediment had concentrations of 28 ...
M. Felix, S. Sturton, J. Peakall
openaire   +1 more source

A current statistical model adopted velocity measurement

2011 International Conference on Computer Science and Service System (CSSS), 2011
In order to track maneuvering target in three-dimensional space fast and accurately, aiming at the radar system which can detect radial and angular velocity, a new target tracking algorithm in the three-dimensional space based on the current statistical algorithm(CS) is presented up, which uses the radial velocity and angular velocity.
openaire   +1 more source

Velocity measurement of a vertical current of air using scintillation of laser beam

Proceedings of the 41st SICE Annual Conference. SICE 2002., 2003
A wind velocimeter using scintillation of the laser beam has been developed for a portion of a gas flux monitor, which has been modified common eddy correlation method. The velocimetry system shares the laser beam with a laser absorption spectrometry (LAS) system and can obtain the wind velocity in the quite same location that the LAS system monitors ...
Kagawa, Naoki, Numano, Shuji, Yoshimura, Hiroyuki, Wada, Osami, Koga, Ryuji   +4 more
openaire   +1 more source

Study on the Measurement System for Current Velocity and Direction at Closure Gap

2010 International Conference on Electrical and Control Engineering, 2010
Based on GPS PPK technique, attitude determination technique, INS orientation technique and information acquisition and processing technique, a drifting system for the determination of velocity and direction of surface current at closure water area is presented in this paper.
Hongmei Zhang, Jianhu Zhao, Shengping Wang   +2 more
openaire   +1 more source

Concentration and velocity measurements in experimental turbidity currents 

2021
<p>Turbidity currents are in the range of highly sediment concentrated flows, challenging traditional (i.e. optical and acoustic) techniques that aim to measure concentration and velocity quantities. In typical laboratory conditions, difficulties increase in the presence of highly non-uniform and unsteady flows.
Patricia Buffon, Daniel Valero, Wim Uijttewaal, Mário Franca   +3 more
openaire   +1 more source

Normalized velocity profiles of field-measured turbidity currents

Geology, 2010
Multiple turbidity currents were recorded in two submarine canyons with maximum speed as high as 280 cm/s. For each individual turbidity current measured at a fixed station, its depth-averaged velocity typically decreased over time while its thickness increased.
openaire   +1 more source

Results from cross-correlation measurement of estuarine current velocity

The Journal of the Acoustical Society of America, 1998
A technique for accurate measurement of the average water velocity in estuarine environments has been developed. The technique is based on measuring the travel time of 200-kHz ultrasonic signals. A high degree of precision has been obtained using a cross-correlation technique, and long, detailed time series have been recorded.
Roger W. Bland, Daniel G. Neuman
openaire   +1 more source

Wave particle velocities measured with a Doppler current meter

Journal of the Oceanographical Society of Japan, 1971
A newly developed three-dimensional Doppler current meter is described and the results of preliminary field experiments are presented where simultaneous measurements of surface elevation and water velocity associated with wave orbital motion were made. The phase difference between the surface elevation and the vertical velocity measured at 1.0 and 0.45
openaire   +1 more source