63 research outputs found
Hybrid functions approach to solve a class of Fredholm and Volterra integro-differential equations
In this paper, we use a numerical method that involves hybrid and block-pulse
functions to approximate solutions of systems of a class of Fredholm and
Volterra integro-differential equations. The key point is to derive a new
approximation for the derivatives of the solutions and then reduce the
integro-differential equation to a system of algebraic equations that can be
solved using classical methods. Some numerical examples are dedicated for
showing efficiency and validity of the method that we introduce
Uniform Artin-Rees Bounds for Syzygies
Let be a local Noetherian ring, let be a finitely generated
-module and let be a free resolution of
. We find a uniform bound such that the Artin-Rees containment holds for
all integers , for all integers , and for all ideals of
. In fact, we show that a considerably stronger statement holds. The uniform
bound holds for all ideals and all resolutions of th syzygy modules. In
order to prove our statements, we introduce the concept of Koszul annihilating
sequences.Comment: 14 page
Reversed-phase high-performance liquid chromatographyâfluorescence detection for the analysis of glutathione and its precursor Îł-glutamyl cysteine in wines and model wines supplemented with oenological inactive dry yeast preparations
El pdf del artĂculo es la versiĂłn pre-print.A reversed-phase high-performance liquid chromatography-fluorescence detection methodology involving a pre-column derivatization procedure using 2,3-naphtalenedialdehyde in the presence of 5 and 0. 5 mM of dithiothreitol to determine total and reduced glutathione (GSH) and ĂÂł-glutamyl-cysteine (ĂÂł-glu-cys) in musts and wines has been set up and validated. The proposed method showed good linearity (R 2 >99% for reduced and total GSH, and R 2 >98% for ĂÂł-glu-cys) in synthetic wines, over a wide range of concentration (0-10 mg L -1). The limits of detection for reduced GSH in synthetic and real wines were almost the same (0. 13 and 0. 15 mg L -1, respectively) and slightly higher for ĂÂł-glu-cys (0. 24 mg L -1). The application of the method allowed knowing, for the first time, the amount of total and reduced GSH and ĂÂł-glu-cys released into synthetic wines by oenological preparations of commercial inactive dry yeast (IDY). In addition, the evolution of these three compounds during the winemaking and shelf life (0-9 months) of an industrially manufactured rosĂ© wine supplemented with a GSH-enriched IDY showed that although GSH is effectively released from IDY, it is rapidly oxidized during alcoholic fermentation, contributing to the higher total GSH content determined in wines supplemented with GSH-enriched IDYs compared to control wines. © 2011 Springer Science+Business Media, LLC.IAO and JJRB acknowledge CAM and CSIC for their respective research grants. This work has been founded by PET2007-0134 project.Peer Reviewe
Coefficient theorems of Birancon-Skoda type
Title from PDF of title page (University of Missouri--Columbia, viewed on May 21, 2012).The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.Dissertation supervisor: Dr. Ian AberbachVita.Includes bibliographical references."July 2011."[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The original Briancon-Skoda theorem, proved for the ring of convergent power series over the field of complex numbers, was later generalized to arbitrary regular local rings by Lipman and Sathaye, who showed that if (R, m) is a regular local ring and an ideal of generated by elements, then for all , If (R,m) is regular local, an ideal of analytic spread and any reduction, then Lipman and Sathaye's theorem implies that , for all . Set w=0 to conclude that . Hence any element of is a linear combination of the generators of with coefficients in . In this thesis, we study the coefficients involved in the Briancon-Skoda theorem when is a minimal reduction, to show that, under some hypotheses, one can get some information on those coefficients. We also show that, in the case where the ring is Gorenstein, the power of in can be reduced. Concretely, we give results on when the integral closure of is contained in .--From short.pdf
External dependencies in software development
International audienceSuccessful software requires constant modifications. To guarantee the continuous proper functioning of the applications, developers need to understand them well, particularly by having an accurate map of the dependencies between the parts they are modifying. However, some of these dependencies are not easily identified. For example, in an Android application, there are dependencies between the Java source code and XML parts, some of which are materialized by a generated "R" Java class. We call such dependencies external because they are introduced by some agent external to the source code. On top of the categorization of dependencies defined in the literature, we define restrictions on the External Dependencies that allow us to verify the source code and identify possible flaws. We created a common approach relying on reusable patterns to search for containers and entities that are part of such dependencies and implemented it in a prototype that we validate on two different projects from GitHub and developed using different frameworks
Analyse de lâidentitĂ© fĂ©minine dans la littĂ©rature arabo-amĂ©ricaine
Cette thĂšse Ă©tudie des Ćuvres littĂ©raires arabo-amĂ©ricaines contemporaines Ă©crites par des femmes, plus spĂ©cifiquement les Ă©crits dâEvelyn Shakir tels que Bint Arab, ainsi que plusieurs autres romans dont Arabian Jazz et Crescent de Diana Abu Jaber, The Inheritance of Exile de Susan Muaddi Darraj, The Night Counter dâAlia Yunis, et Once in a Promised Land de Laila Halaby. Elle montre comment ces Ćuvres construisent des univers oĂč peuvent ĂȘtre interrogĂ©es les notions dâidentitĂ©, de culture, dâethnicitĂ©, et de genre. Les conflits quotidiens autour de lâidentitĂ© sont traitĂ©s en se fondant Ă la fois sur les Ćuvres critiques des femmes arabo-amĂ©ricaines et sur les Ă©tudes psycho-sociales du biculturalisme. De plus, ce travail met lâaccent sur la formation de solidaritĂ©s entre les femmes de couleur, en Ă©largissant le concept de « conscience des zones frontaliĂšres » dâAnzaldua pour inclure les Ćuvres des Ă©crivaines arabo-amĂ©ricaines. Les thĂ©ories dĂ©veloppĂ©es aprĂšs la colonisation, particuliĂšrement les Ă©tudes sur lâorientalisme Ă la suite dâEdward Said, sont Ă©galement invoquĂ©es pour remettre en question le modĂšle oriental de la fĂ©minitĂ©. Enfin, cette thĂšse analyse la narration et son rĂŽle dans la crĂ©ation dâun point dâancrage pour les identitĂ©s « exilĂ©es », insistant plus particuliĂšrement sur la figure de ShĂ©hĂ©razade. Ce travail montre ainsi la façon dont les productions littĂ©raires peuvent crĂ©er de nouveaux espaces pour comprendre les problĂšmes sociaux, politiques, culturels, ou ethniques.This dissertation analyses contemporary Arab-American literary productions by female writers, specifically, Shakirâs collection of memoirs Bint Arab and her two short stories âOh Lebanonâ and âName Calling,â as well as a selection of novels, Abu Jaberâs Arabian Jazz and Crescent, Darrajâs The Inheritance of Exile, Alia Yunisâs The Night Counter, and Laila Halabyâs Once in a Promised Land. It shows how these works construct a space which enables them to investigate questions of identity, culture, ethnicity and gender. Identity conflicts around everyday matters like physical appearance, color, dress codes, veiling, chastity, and marriage are addressed by drawing upon critical works by Arab-American female writers and psycho-social studies on biculturalism. Moreover, this work emphasizes coalition-building with women of color by extending Anzalduaâs concept of the âconsciousness of the borderlandsâ to encompass works by Arab-American female writers. Theories by post-colonial thinkers, particularly Saidâs studies on Orientalism, also contribute to the dissertationâs questioning of the Oriental model of womanhood. Finally, this dissertation envisages critical works that study storytelling and its role in creating a surrogate home for âexilicâ identities, with special emphasis on the Scheherazadian narrative. This project views literary productions as an appropriate way to investigate social, political, cultural and ethnic issues. It shows how writings by Arab-American women contribute to exploring inner identity conflicts, how they connect with other minority groups, and how they create a new sense of home
Hepatitis C virus reactivation in patients receiving cancer treatment: A prospective observational study
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141371/1/hep29344_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/141371/2/hep29344.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/141371/3/hep29344-sup-0001-suppinfo01.pd
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