in this study ptfeco ternary alloys nanoparticles of three dimentional (3d) rhombus shapes dispersed on graphene nanosheets (ptfeco/gr) were successfully prepared and studied as electrocatalysts for oxygen reduction reaction (orr) in polymer-electrolyte fuel cells. a combination of analytical techniques including powder x-ray diffraction, x-ray photoelectron spectra, inductively coupled plasma-...

In this study PtFeCo ternary alloys nanoparticles of three dimentional (3D) rhombus shapes dispersed on graphene nanosheets (PtFeCo/Gr) were successfully prepared and studied as electrocatalysts for oxygen reduction reaction (ORR) in polymer-electrolyte fuel cells. A combination of analytical techniques including powder X-ray diffraction, X-ray photoelectron spectra, inductively coupled plasma-...

We investigate the game of peg solitaire on different board shapes, and find those of diamond or rhombus shape have interesting properties. When one peg captures many pegs consecutively , this is called a sweep. Rhombus boards of side 6 have the property that no matter which peg is missing at the start, the game can be solved to one peg using a maximal sweep of length 16. We show how to constru...

Basin, lakes, and pore-grain space are important geophysical shapes, which can fit with the several classical and fractal binary shapes, are processed by employing morphological transformations, and methods. The decomposition of skeleton network (minimum morphological information) using various classical structures like square, octagon and rhombus. Then derive the dilated subsets respective deg...

An opportunity of conversion algebraic surfaces with a main frame from three superellipses general type into ruled several views is shown. It necessary to take one, two, or all in the form rhombus, i.e. it assume exponents explicit equations suitable equal one. was illustrated that having taken one and same plane curves lying coordinate planes, can construct different orders. So, possible intro...

This study aims to determine ethnomathematics studies on the Langkanae palace building in city of Palopo. type research is descriptive qualitative. The main instrument researcher and instruments used are interview guidelines, literature documentation. technique was through interviews, study, documentation with qualitative data analysis consisting 3 stages, namely reduction, presentation drawing...

This paper proposes and describes a novel technique for organic shapes classification by similarity to basic geometric shapes. The amber data used in experiments are collected by amber art craft industry experts and the presented investigations were care out in order to develop a classifier for online amber sorting application. The centroid distance function was selected for shape representatio...

1 , . . . , xn, x −1 n factorizes into a product of two odd orthogonal characters of rectangular shape, one of which is evaluated at −x1, . . . ,−xn, if M is even, while it factorizes into a product of a symplectic character and an even orthogonal character, both of rectangular shape, if M is odd. It is furthermore shown that the first factorization implies a factorization theorem for rhombus t...

Pascal’s rhombus is a variation of Pascal’s triangle in which values are computed as the sum of four terms, rather than two. It is shown that the limiting ratio of the number of ones to the number of zeros in Pascal’s rhombus, taken modulo 2, approaches zero. An asymptotic formula for the number of ones in the rhombus is also shown. c © 1999 Elsevier Science B.V. All rights reserved