10,503 research outputs found
Approximation of zonoids by zonotopes in fixed directions
No full textA construction is given which, for any zonoid Z⊂R d and any unit vectors u 1,..., u k, produces a zonotope Z′ which is a sum of at most k segments and has the same support values as Z in the directions u 1, ..., u k . Applications to an estimation problem for fiber processes are also given as well as some related results for convex bodies. © 1994 Springer-Verlag New York Inc
Aqui jaz uma morte: atitudes fúnebres na trajetória da empresa funerária da família Haas de Blumenau
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em História, Florianópolis, 2013.Desde os primeiros anos do século XX, a empresa da família Haas de Blumenau (Santa Catarina, Brasil) dedica-se ao mercado funerário. A pequena oficina, fundada por Mathias e seu pai, estabeleceu-se com a fabricação de túmulos e a arte dos marmoristas, com destaque para o próprio Mathias que esculpiu na pedra, túmulos e ornamentos funerários. A administração da empresa, sempre a cargo de membros da Haas, depois de algumas décadas de dedicação à arquitetura funerária e também civil, concentrou seus esforços na gerência de uma agência funerária. Com a funerária, a empresa ofereceu aos seus clientes uma série de serviços voltados ao cuidado do corpo e por último, entrou no segmento de vendas de planos funerários. Desde a sua fundação, a empresa enfrentou mudanças e teve que administrar momentos de transição e de adequação de seus produtos e investimentos para conciliar mudanças nos ritos e a entrada de novidades no mercado funerário. A trajetória da família Haas possibilitou as reflexões desta tese que buscou pensar sobre as atitudes fúnebres e a morte, em diferentes momentos, por meio de sua empresa. Contando com um acervo documental formado por imagens, escritos pessoais, partes de construções tumulares, blogs, notas fiscais, documentos administrativos, catálogos de modelos tumulares e depoimentos, foram percebidas mudanças no tratamento do corpo morto e no seu destino final. <br
Migration and development. A theoretical perspective
No full textde Haas H. Migration and development. A theoretical perspective. COMCAD Arbeitspapiere - working papers, 29. Bielefeld: COMCAD - Center on Migration, Citizenship and Development; 2007
The uniting of Europe and the foundation of EU studies: revisiting the neofunctionalism of Ernst B. Haas
No full textThis article suggests that the neofunctionalist theoretical legacy left by Ernst B. Haas is somewhat richer and more prescient than many contemporary discussants allow. The article develops an argument for routine and detailed re-reading of the corpus of neofunctionalist work (and that of Haas in particular), not only to disabuse contemporary students and scholars of the normally static and stylized reading that discussion of the theory provokes, but also to suggest that the conceptual repertoire of neofunctionalism is able to speak directly to current EU studies and comparative regionalism. Neofunctionalism is situated in its social scientific context before the theory's supposed erroneous reliance on the concept of 'spillover' is discussed critically. A case is then made for viewing Haas's neofunctionalism as a dynamic theory that not only corresponded to established social scientific norms, but did so in ways that were consistent with disciplinary openness and pluralism
The de Haas van Alphen effect near a quantum critical end point in Sr₃Ru₂O₇
No full textHighly correlated electron materials are systems in which many new states of matter can emerge. A particular situation which favours the formation of exotic phases of the electron liquid in complex materials is that where a quantum critical point (QCP) is present in the phase diagram. Neighbouring regions in parameter space reveal unusual physical properties, described as non-Fermi liquid behaviour.
One of the important problems in quantum criticality is to find out how the Fermi surface (FS) of a material evolves near a QCP. The traditional method for studying the FS of materials is the de Haas van Alphen effect (dHvA). A quantum critical end point (QCEP) has been reported in the highly correlated metal Sr₃Ru₂O₇, which is tuned using a magnetic field high enough to perform the dHvA experiment. It moreover features a new emergent phase in the vicinity of the QCEP, a nematic type of electron ordering.
The subject of this thesis is the study of the FS of Sr₃Ru₂O₇ using the dHvA effect. Three aspects were explored. The first was the determination of the FS at fields both above and below that where the QCEP arises. The second was the search for quantum oscillations inside the nematic phase. The third was a reinvestigation of the behaviour of the quasiparticle effective masses near the FS.
In collaboration with angle resolved photoemission spectroscopy experimentalists, a complete robust model for the FS of Sr₃Ru₂O₇ at zero fields was determined. Moreover, the new measurements of the quasiparticle masses revealed that no mass enhancements exist anywhere around the QCEP, in contradiction with previous specific heat data and measurements of the A coefficient of the power law of the resistivity. Finally, we report dHvA oscillations inside the nematic phase, and the temperature dependence of their amplitude suggests strongly that the carriers consist of Landau quasiparticles
Migration systems, pioneers and the role of agency
No full textThe notion of a migration system is often invoked but it is rarely clearly defined or conceptualized. De Haas has recently provided a powerful critique of the current literature highlighting some important flaws that recur through it. In particular, migration systems tend to be identified as fully formed entities, and there is no theorization as to how they come into being. Moreover, there is no explanation of how they change in time, in particular how they come to decline. The inner workings – the mechanics – which drive such changes are not examined. Such critiques of migration systems relate to wider critiques of the concept of systems in the broader social science literature, where they are often presented as black boxes in which human agency is largely excluded. The challenge is how to theorize the mechanics by which the actions of people at one time contribute to the emergence of systemic linkages at a later time. This paper focuses on the genesis of migration systems and the notion of pioneer migration. It draws attention both to the role of particular individuals, the pioneers, and also the more general activity of pioneering which is undertaken by many migrants. By disentangling different aspects of agency, it is possible to develop hypotheses about how the emergence of migrations systems is related to the nature of the agency exercised by different pioneers or pioneering activities in different contexts.migration systems, agency, emergence, pioneer migrants, migrant networks, social capital
Exclusive and inclusive semileptonic decays of B mesons to D mesons
No full textcomplete author list: Fulton R.; Jensen T.; Johnson D.; Kagan H.; Kass R.; Morrow F.; Whitmore J.; Wilson P.; Bortoletto D.; Chen W.; Dominick J.; McIlwain R.; Miller D.; Ng C.; Schaffner S.; Shibata E.; Shipsey I.; Yao W.; Battle M.; Sparks K.; Thorndike E.; Wang C.; Alam M.; Kim I.; Li W.; Romero V.; Sun C.; Wang P.; Zoeller M.; Goldberg M.; Haupt T.; Horwitz N.; Jain V.; Mestayer M.; Moneti G.; Rozen Y.; Rubin P.; Sharma V.; Skwarnicki T.; Thulasidas M.; Zhu G.; Csorna S.; Letson T.; Alexander J.; Artuso M.; Bebek C.; Berkelman K.; Browder T.; Cassel D.; Cheu E.; Coffman D.; Crawford G.; Dewire J.; Drell P.; Ehrlich R.; Galik R.; Garcia-Sciveres M.; Geiser B.; Gittelman B.; Gray S.; Halling A.; Hartill D.; Heltsley B.; Honscheid K.; Kandaswamy J.; Katayama N.; Kreinick D.; Lewis J.; Ludwig G.; Masui J.; Mevissen J.; Mistry N.; Nandi S.; Nordberg E.; O'Grady C.; Peterson D.; Pisharody M.; Riley D.; Sapper M.; Selen M.; Silverman A.; Stone S.; Worden H.; Worris M.; Sadoff A.; Avery P.; Besson D.; Garren L.; Yelton J.; Kinoshita K.; Pipkin F.; Procario M.; Wilson R.; Wolinski J.; Xiao D.; Zhu Y.; Ammar R.; Baringer P.; Coppage D.; Davis R.; Haas P.; Kwak N.; Lam H.; Ro S.; Kubota Y.; Nelson J.; Perticone D.; Poling R.; Fulton R.; Poling R.; Perticone D.; Nelson J.; Fulton R.</p
Automating Author Gender Identification from Blogs
No full textThe rapid growth of public blogging on the Internet has opened up a vast trove of information that can be text mined for potential insights. This study explores the potential of automating blog author gender based on differences in lexical expressions. The results of this study were mixed, and further refinement is needed.Master of Science in Information Scienc
Wireless myths, realities, and futures: from 3G/4G to optical and quantum wireless
No full textThis paper evaluates both the operational third-generation (3G) as well as the emerging fourth-generation (4G) wireless systems and investigates new technologies that might transpire and change things in the future.<br/
Broad-line region structure and line profile variations in the changing look AGN HE 1136-2304
No full textAims. A strong X-ray outburst was detected in HE 1136-2304 in 2014. Accompanying optical spectra revealed that the spectral type has changed from a nearly Seyfert 2 type (1.95), classified by spectra taken 10 and 20 years ago, to a Seyfert 1.5 in our most recent observations. We seek to investigate a detailed spectroscopic campaign on the spectroscopic properties and spectral variability behavior of this changing look AGN and compare this to other variable Seyfert galaxies.
Methods. We carried out a detailed spectroscopic variability campaign of HE 1136-2304 with the 10 m Southern African Large Telescope (SALT) between 2014 December and 2015 July.
Results. The broad-line region (BLR) of HE 1136-2304 is stratified with respect to the distance of the line-emitting regions. The integrated emission line intensities of Hα, Hβ, He
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