A new Characterization of Type-$2$ Feasibility - ProQuest[Copyright] (C) 1996 (C) Society for Industrial and Applied MathematicsThis is a short preview of the document. Your library or institution may give you access to the complete full text for this document in ProQuest.; .
; Philadelphia (Feb 1996): 16.Buoyancy effects of a growing, isolated dendrite - ScienceDirect
ExportJavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page., October 1991, Pages 153-185Author links open overlay panelShow moreAbstractAn axisymmetric dendrite of pure material solidifies downward into an undercooled melt. Surface energy and kinetic undercooling are negligible. The Ivantsov [Dokl. Akad. Nauk SSSR 58 (] parabolic dendrite is modified by buoyant convection. We construct an approximate solution to the growth/convection problem in powers of a buoyancy parameter G. The solution depends on Prandtl number P and Stefan number S (undercooling). When P and/or S are large enough, buoyancy enhances growth and distorts the dendrite by sharpening the tip and widening the base. These results compare well with the experiments on succinonitrile (P = 23) of Huang and Glicksman [Acta Met. 29 (] and the local theory of Ananth and Gill [J. Crystal Growth 91 (] up to G ≈ 1000, but overpredict convective effects for larger G. When P and S are small enough, buoyancy slows growth and flattens the tip. Physical explanations are given for the differences in buoyant effects at different P. The results suggest that near-tip effects of buoyancy should be different in metallics than in organics.Choose an option to locate/access this article:Check if you have access through your login credentials or your institution.orRecommended articlesCiting articles (0)Please enable JavaScript to view the page content.Higher order cohomology operations and minimal atomicity
See all >14 References
We prove that >Sn (2), S n {2r}, and >2Sn (2) are minimal atomic spaces for appropriate values of n. We do this by using secondary and tertiary cohomology operations to prove that, above the Hurewicz dimension, no elements in the mod 2 homology of the cited spaces are in the image of the Hurewicz homomorphism. In the case of >2Sn, we construct and exploit an appropriate filtration to facilitate the use of higher order cohomology operations. An appendix consisting of an exami- nation of the coecients in Adams' factorization is included.Do you want to read the rest of this article?Request full-text
ArticleJan 2001ArticleDec 1989ArticleDec 1971ArticleSep 1958ArticleArticleJan 2001ArticleFull-text availableOct 1989ArticleMar 2005ChapterNov 2006ArticleMay 2004Show moreArticleMay 2004 · We define minimal atomic complexes and irreducible complexes, and we prove that they are the same. The irreducible complexes admit homological characterizations that make them easy to recognize. These concepts apply both to spaces and to spectra. On the spectrum level, our characterizations allow us to show that such familiar spectra as ko, eo2, and BoP at the prime 2, all BP〈n〉 at any prime... [Show full abstract]ArticleApril 2010 · In the derived category of a local commutative noetherian ring, we define irreducible chain complexes, atomic chain complexes, minimal atomic chain complexes and chain complexes having no mod m detectable homology. Also, we define nuclear chain complexes and core of chain complexes. After defining these notions, we establish the connection between them. ArticleDecember 1995 · We compute the first EHP spectral sequence differential followed by the double suspension. We show that 2π * (S 4n+1 )?Im(E 2 ), which refines the exponent for π * (S 2n+1 ) of I. M. James [Ann. Math., II. Ser. 65, 74-107 (1957; Zbl )] and P. Selick [Topology 23, 97-99 (1984; Zbl )]. The proof follows an odd primary program of B. Gray [Math. Proc. Camb. Philos. Soc. 96,... [Show full abstract]ArticleAssessment of the proliferative activity and radiosensitivity of human tumours using the cytokinesis-block micronucleus assay.
The NCBI web site requires JavaScript to function.}