180,869 research outputs found
Thermodynamics of Alon III : stabilization of Alon with MgO
No full textThe ceramic material g-aluminum oxynitride (Alon) has been shown earlier to be thermodynamically unstable at temps. below 1640 DegC. In this paper it is shown that it is possible to stabilize Alon below this temp. by addn. of MgO. For this purpose, the phase diagram Al2O3-AlN-MgO was investigated at 1750 and 1400 DegC. At 1750 DegC the homogeneity region of the spinel-type phase (MgAlon) extends from the Al2O3-MgO system to the Al2O3-AlN system. The lattice parameter of MgAlon can be represented by a = 0.7900 + 0.0160x + 0.0206y, in which a is the lattice parameter in nanometers and x and y are the mol fractions of AlN and MgO, resp. At 1400 DegC the homogeneity region of MgAlon extends from the Al2O3-MgO system towards Alon and AlN; however, it does not reach the Al2O2-AlN system. About 25 mol% of MgO (or .apprx. 50 mol% MgAl2O4) has to be added to Alon to stabilize it at 1400 DegC. For that reason, the properties of MgAlon which is stable at 1400 DegC will probably be more akin to those of MgAl2O4 than to those of Alon. [on SciFinder (R)
Ilan Alon et John R. McIntyre (éd.), Globalization of Chinese Enterprises
No full textRichet Xavier. Ilan Alon et John R. McIntyre (éd.), Globalization of Chinese Enterprises. In: Perspectives chinoises, n°105, 2008. pp. 125-128
Right on the Spot: Chemokine Triggering of Integrin–Mediated Arrest of Rollino Leukocytes
No full textThermodynamics of Alon II : phase relations
No full textThe dependence of the lattice parameter of g-aluminum oxynitride (Alon) on its compn. was investigated. The width of the homogeneity of Alon varies with temp.: at 1850 Deg Alon is the stable phase between 66 mol% Al2O3 (lattice parameter 0.7953 nm) and 81 mol% Al2O3 (lattice parameter 0.7932 nm). This region becomes smaller at lower temps. A
Thermodynamics of Alon I : stability at lower temperatures
No full textThe formation and stability of aluminum oxynitride (Alon) under various circumstances are described using Ellingham and activity diagrams. With the help of these diagrams, the connection between seemingly uncorrelated exptl. observations on the stability of Alon from the literature can be understood. Thermodn. data sets for Alon are crit. reviewed. Alon is stable only within a small region of oxygen and nitrogen pressures, and it is not stable a
Quasi-randomness and algorithmic regularity for graphs with general degree distributions
No full textWe deal with two intimately related subjects: quasi-randomness and regular partitions. The purpose of the concept of quasi-randomness is to express how much a given graph “resembles” a random one. Moreover, a regular partition approximates a given graph by a bounded number of quasi-random graphs. Regarding quasi-randomness, we present a new spectral characterization of low discrepancy, which extends to sparse graphs. Concerning regular partitions, we introduce a concept of regularity that takes into account vertex weights, and show that if satisfies a certain boundedness condition, then admits a regular partition. In addition, building on the work of Alon and Naor [Proceedings of the 36th ACM Symposium on Theory of Computing (STOC), Chicago, IL, ACM, New York, 2004, pp. 72–80], we provide an algorithm that computes a regular partition of a given (possibly sparse) graph in polynomial time. As an application, we present a polynomial time approximation scheme for MAX CUT on (sparse) graphs without “dense spots.
A high performance transparent resistive switching memory made from ZrO2/AlON bilayer structure
No full textIn this study, the switching properties of an indium tin oxide (ITO)/zirconium oxide (ZrO2)/ITO single layer device and those of a device with an aluminum oxynitride (AlON) layer were investigated. The devices with highly transparent characteristics were fabricated. Compared with the ITO/ZrO2/ITO single layer device, the ITO/ZrO2/AlON/ITO bilayer device exhibited a larger ON/OFF ratio, higher endurance performance, and superior retention properties by using a simple two-step forming process. These substantial improvements in the resistive switching properties were attributed to the minimized influence of oxygen migration through the ITO top electrode (TE), which can be realized by forming an asymmetrical conductive filament with the weakest part at the ZrO2/AlON interface. Therefore, in the ITO/ZrO2/AlON/ITO bilayer device, the regions where conductive filament formation and rupture occur can be effectively moved from the TE interface to the interior of the device. Published by AIP Publishing.Ministry of Science and Technology, Taiwan [NSC 102-2221-E009-134-MY3]SCI(E)[email protected]
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Travel agent's perception of cruise tourism in Croatia and Slovenia
No full textThe proposed research analyzes a segment of the leisure and hospitality sector in Croatia and Slovenia. Specifically, we examine the perceptions of travel agents regarding vacation alternatives in general and cruising in particular. The paper presents a literature review of the cruise industry, then describes three issues: travel agents as a channel of distribution, the cruise buying process, and outbound tourism in Slovenia and Croatia. The two markets we examine represent two levels of economic development and tourism market maturity in Central Europe. Data have been collected using MBA student teams from the United States and Italy posing as mystery shoppers, looking for travel destinations and cruises as an option. A total of 57 Croatian agencies and 29 Slovenian agencies were examined. Final results are tied to the literature review and conclusions are drawn about the potential opportunities and threats in the market
Alon–Babai–Suzuki’s inequalities, Frankl–Wilson type theorem and multilinear polynomials
No full textAbstractLet K={k1,k2,…,kr} and L={l1,l2,…,ls} be subsets of {0,1,…,p−1} such that K∩L=0̸, where p is a prime. Let F={F1,F2,…,Fm} be a family of subsets of [n]={1,2,…,n} with |Fi| (modp) ∈K for all Fi∈F and |Fi∩Fj| (modp) ∈L for any i≠j. Every subset Fi of [n] can be represented by a binary code a=(a1,a2,…,an) such that aj=1 if j∈Fi and aj=0 if j∉Fi. Alon–Babai–Suzuki proved in non-modular version that if ki≥s−r+1 for all i, then |F|≤∑i=s−r+1s(ni). We generalize it in modular version. Alon–Babai–Suzuki also proved that the above bound still holds under r(s−r+1)≤p−1 and n≥s+maxiki in modular version. Alon–Babai–Suzuki made a conjecture that if they drop one condition r(s−r+1)≤p−1 among r(s−r+1)≤p−1 and n≥s+maxiki, then the above bound holds. But we prove the same bound under dropping the opposite condition n≥s+maxiki. So we prove the same bound under only condition r(s−r+1)≤p−1. This is a generalization of Frankl–Wilson theorem (Frankl and Wilson, 1981 [2])
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