A context-based scanning technique for images is presented. An image is scanned along a context-based space filling curve that is computed so as to exploit inherent coherence in the image. The resulting one-dimensional representation of the image has improved autocorrelation compared with universal scans such as the PeanoHilbert space filling curve. An efficient algorithm for computing context-...

When setting up a computer experiment, it has become a standard practice to select the inputs spread out uniformly across the available space. These so-called spacefilling designs are now ubiquitous in corresponding publications and conferences. The statistical folklore is that such designs have superior properties when it comes to prediction and estimation of emulator functions. In this paper ...

Let S be a Riemann surface of type (p, n) with 3p + n > 4 and n ≥ 1. Let α1, α2 ⊂ S be two simple closed geodesics such that {α1, α2} fills S. It was shown by Thurston that most maps obtained through Dehn twists along α1 and α2 are pseudo-Anosov. Let a be a puncture. In this paper, we study the family F(S, a) of pseudo-Anosov maps on S that projects to the trivial map as a is filled in, and sho...

In [14] Matsuda and Yorozu.explained that there is no special Bertrand curves in Eⁿ and they new kind of Bertrand curves called (1,3)-type Bertrand curves Euclidean space. In this paper , by using the similar methods given by Matsuda and Yorozu [14], we obtain that bitorsion of the quaternionic curve is not equal to zero in semi-Euclidean space E4^2. Obtain (N,B2) type quaternionic Bertrand cur...

Let M^2n be a hoph hypersurfaces with parallel ricci operator and tangent to structure vector field in Sasakian space form. First, we show that structures and properties of hypersurfaces and hoph hypersurfaces in Sasakian space form. Then we study the structure of hypersurfaces and hoph hypersurfaces with a parallel ricci tensor structure and show that there are two cases. In the first case, th...

Characterisation of space debris has become a fundamental task to facilitate sustainable operations. Ground-based surveillance provides the means extract key attributes from spacecraft. However, signal inversion attempts are generally under-constrained, which is why an increase in measurement channels through multispectral observations expected benefit parameter estimation. The current approach...