A new method for moving target detection, localization, and velocity estimation using SAR raw data is presented which allows the determination of the target’s complete velocity vector. The method is applicable if the target has either a tangential velocity ( I l l # 0) or a radial acceleration ( ~ I R # 0), or both. It is based on the analysis of the Doppler rate map which is obtained from the ...

A new method for quantifying the transvalvular flow through the mitral valve (MV) based on three-directional velocity-encoded magnetic resonance imaging (MRI) is presented. For thirty time phases during one cardiac cycle, the three-dimensional (3D) velocity vector field of the blood flow is reconstructed from the MRI measurement. Retrospectively, for each time phase, the MV-plane is indicated m...

The high quality of Hipparcos data in position, proper motion, and parallax has allowed for studies about stellar kinematics with the aim of achieving a better physical understanding of our galaxy, based on accurate calculus of the Ogorodnikov–Milne model (OMM) parameters. The use of discrete least squares is the most common adjustment method, but it may lead to errors mainly because of the inh...

This paper describes a method for estimating the attitude of an underwater robot. The method employs a new concept of sine rotation vector and uses both an attitude heading and reference system (AHRS) and a Doppler velocity log (DVL) for the purpose of measurement. First, the acceleration and magnetic-field measurements are transformed into sine rotation vectors and combined. The combined sine ...

We describe the application of a novel image processing method, which allows quantitative analysis of cell and tissue movement in a series of digitized video images. The result is a vector velocity field showing average direction and velocity of movement for every pixel in the frame. We apply this method to the analysis of cell movement during different stages of the Dictyostelium developmental...

A method is proposed for reconstructing the full vector velocity eld (i.e., the three velocity components) in the gaseous disks of spiral galaxies from observed radial velocities. The method is based on Fourier analysis of the observed velocity eld and interpretation of the resulting Fourier harmonics in the framework of a model accounting for motion in the spiral arms. The model is based on th...

Fertilizer spreaders are traditionally tested by using the collecting tray method . This method requires large indoor test facilities and is very expensive when applied on a large scale . A proposed alternative method is to measure the velocity and diameter of individual fertilizer particles emanating from the spreader and use a model to predict the landing spot of individual particles . The to...

In this paper, a global optimization method of optical flow technique is presented for estimating tissue-motion velocity from a time series of neonatal cranial ultrasonogram images. The global optimization method is used here was proposed by Horn and Schunck. In this method, the tissuemotion velocity field is determined by minimizing an error function based on the gradient constraint and a glob...

A numerical boundary integral method, relating slip and traction on a plane in an elastic medium by convolution with a discretized Green function, can be linked to a slip-dependent friction law on the fault plane. Such a method is developed here in two-dimensional plane-strain geometry. The method is more efficient for a planar source than a finite difference method, and it does not suffer from...

Relativistic Riemannian superfluid hydrodynamics used in general relativity to investigate superfluids in pulsars is extended to non-Riemannian background spacetime endowed with Cartan torsion. From the Gross-Pitaeviskii (GP) it is shown that in the weak field Cartan torsion approximation, the torsion vector is orthogonal to the super-fluid plane wave velocity. Torsion vector is also shown to b...