15 resultados para Jones matrix

em Brock University, Canada


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Exch~nge energy of the He-He system is calculated using the one-density matrix which has been modified according to the supermolecular density formula quoted by Kolos. The exchange energy integrals are computed analytically and by the Monte Carlo method. The results obtained from both ways compared favourably,with the results obtained from the SCF program HONDO

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A promise by Mr. Jones to pay Thomas Wilson 10 pounds 1/10, New York Currency, with interest. Witness was Mr. T. McCormick

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Self-dual doubly even linear binary error-correcting codes, often referred to as Type II codes, are codes closely related to many combinatorial structures such as 5-designs. Extremal codes are codes that have the largest possible minimum distance for a given length and dimension. The existence of an extremal (72,36,16) Type II code is still open. Previous results show that the automorphism group of a putative code C with the aforementioned properties has order 5 or dividing 24. In this work, we present a method and the results of an exhaustive search showing that such a code C cannot admit an automorphism group Z6. In addition, we present so far unpublished construction of the extended Golay code by P. Becker. We generalize the notion and provide example of another Type II code that can be obtained in this fashion. Consequently, we relate Becker's construction to the construction of binary Type II codes from codes over GF(2^r) via the Gray map.

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Immobilized lipase B from Candida antarctica (Novozym® 435, N435) was utilized as part of a chemoenzymatic strategy for the synthesis of branched polyesters based on a cyclotetrasiloxane core in the absence of solvent. Nuclear magnetic resonance spectroscopy and matrix-assisted laser desorption ionization time-of-flight mass spectrometry were utilized to monitor the reactions between tetraester cyclotetrasiloxanes and aliphatic diols. The enzyme-mediated esterification reactions can achieve 65– 80% consumption of starting materials in 24–48 h. Longer reaction times, 72–96 h, resulted in the formation of cross-linked gel-like networks. Gel permeation chromatography of the polymers indicated that the masses were Mw ¼ 11 400, 13 100, and 19 400 g mol 1 for the substrate pairs of C7D4 ester/ octane-1,8-diol, C10D4 ester/pentane-1,5-diol and C10D4 ester/octane-1,8-diol respectively, after 48 h. Extending the polymerization for an additional 24 h with the C10D4 ester/octane-1,8-diol pair gave Mw ¼ 86 800 g mol 1. To the best of our knowledge this represents the first report using lipase catalysis to produce branched polymers that are built from a cyclotetrasiloxane core.

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Letter addressed to Robert D. Band from A.R.W. Jones of the Personal Trust Department of the Royal Trust Company, Toronto listing the securities to be held by Mr. Band and his sister and brother, Sept. 5, 1961.

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Payment for Shelby, Cunningham, Jarvis, Mater and Jones accounts. This document has some water damage which has smeared the writing but it does not affect text, July 29, 1882.

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Payment for the Shelby, Cunningham, Jarvis, Jones, Mater, Sampson, Conklin, Dennis and Griffin accounts, Jan. 29, 1883.

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Payment for the Shelby, Cunningham, Jarvis, Jones, Mater, Sampson, Dennis, Conklin and Griffin accounts, July 30, 1883.

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Payment for the Cunningham, Jarvis, Jones, Mater, Sampson, Dennis, Conklin and Griffin accounts, Jan. 29, 1884.

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Payment for Atkins, Schmidt, Crick, Mank, Underwood and Crew accounts Jan. 26, 1886.

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Payment for Sampson, Griffin, Cunningham and Jones accounts, Feb. 14, 1887.

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Note (1 page, handwritten) by Samuel Woodruff regarding the Cunningham, Mater and Jones accounts, n.d.

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Letter which was enclosed with the application, bond mortgage and abstract of the Jones and Mater accounts to Samuel Woodruff from Jarvis, Conklin and Co., May 4, 1882.

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Printed blank of Statement of Security Form naming the bond as Jones County Texas Bonds for the purpose of building a courthouse. It is made out to S.D. Woodruff and dated June 12, 1885. An envelope addressed to Mr. S.D. Woodruff is also included. The postmarks are Kansas, 1885 and St. Catharines, June 13, 1885.