The purpose of this paper is to present an algorithm which generates linear extensions for a non-simplylaced d-complete poset with uniform probability. Résumé. Le but de ce papier est présenter un algorithme qui produit des extensions linéaires pour une non-simplylaced d-complete poset avec probabilité constante.

Applicat,ioli of niactiirie inductiori l,cx-tlrliques in corriplcx doltlailis promises to push the computational limits of nofiincrc~rnerila.1, search ilitensive induction methods. 1,earning t~ff;~ctiverlcss in complex domains requires the developrrlerlt of iricrorrierital, cost effective methods. However, discussion 01 ciinierisioris fi>r corriparirig I,he utilily of diffcrirrg increrr~e~~tal ...

A simple column electrode, S-CE, with a glassy carbon fibers working electrode stuffed into a Teflon tube was developed. The current-potential curves for the reductions of [Fe(CN)(6)](3-) and Fe(3+) observed at the S-CE were analyzed based on a theory for those at an ordinary column electrode. A quantitative electrolysis was performed at the S-CE rapidly within 20 s. An accurate and precise cou...

Different catalytic oxidation effects of Ce on W(110) and W(111) were observed with photoemission spectroscopy. On Ce-covered W(110), the top W layer is quickly oxidized to a surface monoxide at room temperature. Oxidation is almost halted after the completion of one monolayer of WO. On Ce/W(111), instead of WO, WO3 grows on the surface under the same conditions. The monolayer suboxide formatio...

A series of ceria nanocatalysts have been prepared to study the structure dependency of the CO oxidation reaction. The ceria samples with well-defined nanostructures (nanocubes/Ce-NC and nanorods/Ce-NR) have been prepared using the hydrothermal method. Mesoporous ceria (Ce-MES) and ceria synthesized with solution combustion technique (Ce-SCS) have also been prepared for comparison. The lowest C...

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This article reports on a magnetometric study of the effects of diluted local random anisotropy in a ferromagnetic FegoB20 amorphous matrix. In the low-temperature and low-field regime the samples, Fe74RE6B20 (RE = Nd, Ce), show a very rich behavior as a consequence of the competition between, and different dependence on T, of the correlation length associated with local random anisotropy and e...

In this paper we derive an enumeration formula for the number of hypermaps of given genus g and given number of darts n in terms of the numbers of rooted hypermaps of genus γ ≤ g with m darts , where m|n. Résumé. Dans ce travail on denombre les hypergraphes d’un genus g donné, et un nombr e de fleches n, selon le nombre de hyper cartes de genus γ ≤ g, et av ec m fleches, ou m|n.

The growth morphology and structure of ceria nano-islands on a stepped Au(788) surface has been investigated by scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). Within the concept of physical vapor deposition, different kinetic routes have been employed to design ceria-Au inverse model catalysts with different ceria nanoparticle shapes and arrangements. A two-dime...