velocities of dual homothetic exponential motions in d3*
Authors
abstract
in this paper the concept of homothetic dual exponential motions in d3 is discussed and theirvelocities obtained. due to the way in which the matter is presented, the paper gives some formula and factsabout dual exponential motions which are not generally known
similar resources
cyclic surfaces in e51 generated by homothetic motions
in this paper, we study cyclic surfaces in 5 1 e generated by homothetic motions of a lorentziancircle. the properties of these cyclic surfaces up to first order are investigated. we show that, as it is shown ine5 , cyclic 2-surfaces in 5 1 e , in general, are contained in canal hypersurfaces. finally, we give an example.
full textRandom Motions with Space-Varying Velocities
Randommotions on the line andon the planewith space-varyingvelocities are considered and analyzed in this paper. On the line we investigate symmetric and asymmetric telegraph processes with space-dependent velocities and we are able to present the explicit distribution of the position T (t), t > 0, of the moving particle. Also the case of a nonhomogeneous Poisson process (with rate λ = λ(t)) go...
full textSkewed, exponential pressure distributions from Gaussian velocities
A simple analytical argument is given to show that the distribution function of the pressure and that of its gradient have exponential tails when the velocity is Gaussian. A calculation of moments implies a negative skewness for the pressure. Explicit analytical results are given for the case of the velocity being restricted to a shell in wave number. Numerical pressure distributions are presen...
full textsteiner formula and holditch-type theorems for homothetic lorentzian motions
the present paper is concerned with the generalization of the holditch theorem under oneparameterhomothetic motion on lorentzian planes. in this paper, for the homothetic lorentzian motion, weexpressed the steiner formula. furthermore, we present the holditch-type theorems.
full textOn the Volume of the Trajectory Surfaces under the Homothetic Motions
The volumes of the surfaces of 3-dimensional Euclidean Space which are traced by a fixed point as a trajectory surface during 3-parametric motions are given by H. R. Müller [3], [4], [5] and W. Blaschke [1]. In this paper, the volumes of the trajectory surfaces of fixed points under 3-parametric homothetic motions are computed. Also, using a certain pseudo-Euclidean metric we generalized the we...
full textAbsolute motions of globular clusters . II ⋆ HST astrometry and VLT radial velocities in NGC 6397
In this paper we present a new, accurate determination of the three components of the absolute space velocity of the Galactic globular cluster NGC 6397 (l ≃ 338◦, b ≃ −12◦). We used three HST/WFPC2 fields with multi-epoch observations to obtain astrometric measurements of objects in three different fields in this cluster. The identification of 33 background galaxies with sharp nuclei allowed us...
full textMy Resources
Save resource for easier access later
Journal title:
iranian journal of science and technology (sciences)ISSN 1028-6276
volume 32
issue 4 2008
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023