196,368 research outputs found
Arithmetic of the Yoshida Lift.
No full textCo-Chairs: Stephen M. DeBacker and Christopher M. Skinner
This thesis concerns the arithmetic properties of the Yoshida lift, Y, which is a scalar- valued holomorphic Siegel modular form of degree 2 obtained as the theta lift of a pair of automorphic forms f1,f2 on D×, where D is a definite quaternion algebra over Q.
Specifically, we define a refined version of the Yoshida lift, Y, which has the special property that it preserves p-integral structures and is not identically zero under mild conditions. For p-integrality, we compute a formula for the Fourier coefficients aT of Y by exploiting an inherent freedom in the definition of Y. The formula for aT in turn allows us to compute the Bessel model of the Yoshida lift, and apply an argument of Cornut–Vatsal to conclude that Y is non-zero. Furthermore, if we assume Artin’s conjecture on primitive roots, then we show that Y is in fact not zero modulo p.PhDMathematicsUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/77876/1/jxj_1.pd
M & L Jaargang 24/4
No full textHilbrand De Vuyst Hout werkt. [Wood Works.]Slechts luttele personen stellen zich vermoedelijk een dergelijke vraag bij een molenbezoek. Zo vervreemd zijn we nu van het traditionele molenmakersambacht. Toch bepaalt nog steeds deze of gene afwerkingstechniek de belevingswaarde van het houten monument, zo verzekert ons Hilbrand De Vuyst, gespecialiseerd erfgoed-consulent. Voor omgang met hout is een grote vakkennis vereist. Molens vormen een ware encyclopedie van de houten bouw- en werktuigkunde. Ze zijn het product van intensief agrarisch en ambachtelijk genie. Met de molenrestauraties van de laatste jaren wordt opnieuw een aanzienlijke ambachtelijke kennis vergaard. Onze kennis neemt weer toe: vast en zeker, hout werkt.Dieter Nuytten Middeleeuwse dakkappen in het voormalige Hertogdom Brabant. [Mediaeval roof trusses in the former dukedom of Brabant.]Bij de middeleeuwse dakkappen van het voormalige hertogdom Brabant herkent men ruwweg twee -technologische groepen: sporenkappen en kappen met gebinten. Dieter Nuytten verkent een aantal Vlaams-Brabantse dakstructuren en stuit hierbij op dateringsmoeilijkheden. Een dendrochronologische datering kan in principe uitsluitsel geven over de precieze ouderdom van de houten structuren, maar er blijven nog tal van probleemgevallen. Vooral de Vlaamse eiken van vroeger geven hun leef-tijd niet prijs. Lokaal hout uit open bossen heeft immers een afwijkend groeipatroon.Inge Debacker Het behoud van houten buitenschrijnwerk: ramen. [The conservation of exterior woodwork: casements.]Houten ramen zijn kwetsbaar, ramen ouder dan de 18de eeuw zijn bijgevolg zelfs in historische gebouwen uiterst zeldzaam. Door de huidige isolatie-eisen, voortspruitend uit het begrip duurzaam bouwen, krijgt historisch raamwerk het bovendien steeds harder te verduren.Na een korte schets van de stilistische evolutie van 18de en 19de-eeuwse houten ramen, worden door Inge Debacker oplossingen tot behoud van historisch schrijnwerk aangereikt. Ze laat zich hierbij onder meer leiden door praktijkvoorbeelden uit Vlaams-Brabant. Ze illustreert treffend dat het begrip duurzaamheid verschillende ladingen dekt.Rudiger Van Hove De doelse Kogge(n). Maritiem erfgoed van Europees formaat. [The Doel cog, maritime heritage of european value.]In een geul in Doelpolder, de Deurganck of het Groot Gat, vindt men in september 2000 bij graafwerken een archeologische verrassing van formaat, een eikenhouten kogge van ruim 20 meter lang die uitzonderlijk goed is bewaard gebleven.De eertijds in dit gat geslagen en nu vakkundig opgegraven, geregistreerde en geborgen Doelse kogge is het centrale onderwerp van de bijdrage van Rudiger Van Hove, hoofd van de Archeologische Dienst Waasland. Samen met de beschrijving van het opgegraven maritiem erfgoed worden ook het onderzoekskader, de eigendom, het beheer en de diverse verantwoordelijkheden deskundig toegelicht.De auteur besluit met: wordt vervolgdSummar
Contractional kink bands formed by stress deflection along pre-existing anisotropies? Examples from the Anglo-Brabant Deformation Belt (Belgium) and the North Dobrogea Orogen (Romania)
No full textKink bands within two slate belts, the Anglo-Brabant Deformation Belt (Belgium) and the North Dobrogea Orogen (Romania), reveal similar problems with respect to linking kink band geometries to expected palaeostress directions. In the North Dobrogea Orogen, the two opposite kink band sets of two different systems of conjugate kink bands develop for a wide variety of cleavage orientations. In the Anglo-Brabant Deformation Belt, the occurrence of the two opposite kink band sets of a conjugate kink band system opposes the expected occurrence. In both cases, this can be attributed to stress deflection along a pre-existing anisotropy. Moreover, the presence of kink bands in the North Dobrogea Orogen with curving kink axes (and curving kink band boundaries) also puts doubt on the direct relationship between kink band geometry and stress. The idea of stress deflection along a pre-existing anisotropy and the strong control of the pre-existing anisotropy on the kink band geometry and orientation has important implications for the use of kink bands as regional palaeostress indicators. Depending on the relative intensity and relative orientation of the pre-existing fabrics (here bedding and cleavage), different mechanisms of kink band development may operate. Depending on the mechanism, different solutions in terms of inferred palaeostress direction may exist. © 2008 Elsevier Ltd. All rights reserved.sponsorship: The authors wish to acknowledge B. Goscombe, D. Srivastava and T. Blenkinsop for their constructive remarks on the manuscript, and are grateful to G. Oaie and M. Vaida for the support during the fieldwork in North Dobrogea (Romania). T.N. Debacker is a Post-doctoral Fellow of the Fund for Scientific Research-Flanders (F.W.O.-Vlaanderen) and M. Sintubin a Research Associate of the "Onderzoeksfonds, K.U.Leuven". This work, resulting from fieldwork when T. Debacker was at the Katholieke Universiteit Leuven (2002-2005), forms part of research projects G.0274.99, G.0094.01 and C.0271.05 of the F.W.O.-Vlaanderen. The research in Romania benefited from the International scientific and technological cooperation program from the Science, Innovation and Media Department of the Ministry of the Flemish Community (BIL01/34). (Science, Innovation and Media Department of the Ministry of the Flemish Community|BIL01/34)status: Publishe
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
The supposed thrust fault in the Dyle-Thyle outcrop area (southern Brabant Massif, Belgium) re-interpreted as a folded low-angle extensional detachment
No full textSince 1943 the anomalous contact in the Dyle-Thyle area between the Lower Cambrian Tubize Formation and older deposits, on the one hand, and the Upper Cambrian Mousty Formation and younger deposits, on the other hand, has been interpreted as a gently N-dipping, large-displacement thrust, the Orne-Noirmont-Baudecet thrust. The irregular fault trace and the presence of a supposed klippe at Court-St.-Etienne are both ascribed to the very gentle fault dip. However, a review of outcrop, borehole and geophysical data shows that there are no convincing arguments for such a gently N-dipping thrust. An alternative model is proposed in which the Orne-Noirmont-Baudecet fault is considered a pre-cleavage and pre-folding low-angle extensional detachment, similar to the Asquempont fault sensu Debacker in the Senne-Sennette area. The irregular subcrop trace of the Orne-Noirmont-Baudecet fault is attributed to the strongly variable fold orientations, associated with a transition zone between steeply plunging and gently plunging folds, similar to what has recently been described in the Senne-Sennette area. Although also this model remains speculative, it is the only model which successfully combines all the data from the Dyle-Thyle area and which is compatible also with the structural architecture of other outcrop and subcrop areas of the Brabant Massif.info:eu-repo/semantics/publishe
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
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