305,555 research outputs found
Fesenko reciprocity map
No full textIn recent papers, Fesenko has defined the non-Abelian local reciprocity map for every totally ramified arithmetically profinite (APF) Galois extension of a given local field K, by extending the work of Hazewinkel and Neukirch-Iwasawa. The theory of Fesenko extends the previous non-Abelian generalizations of local class field theory given by Koch-de Shalit, and by A. Gurevich. In this paper, which is research-expository in nature, we give a detailed account of Fesenko's work, including all the skipped proofs
Some phonetic problems of a public address in english
No full textFesenko E. A. Some phonetic problems of a public address in english [Электронный ресурс] / Fesenko E. A.// Язык как инструмент понимания и непонимания : русско-американские лингвистические и культурные сопоставления : материалы Междунар. науч.-практ. конф., РГГУ (Москва), 26-27 февр. 2008 г. - Москва : РГГУ, 2008. - С. 237-244
Some phonetic problems of a public address in english
No full textFesenko E. A. Some phonetic problems of a public address in english [Электронный ресурс] / Fesenko E. A.// Язык как инструмент понимания и непонимания : русско-американские лингвистические и культурные сопоставления : материалы Междунар. науч.-практ. конф., РГГУ (Москва), 26-27 февр. 2008 г. - Москва : РГГУ, 2008. - С. 237-244
Cell adhesion in the preimplantation mammalian embryo and its role in trophectoderm differentiation and blastocyst morphogenesis
No full textCell adhesion plays a critical role in the differentiation of the trophectoderm epithelium and the morphogenesis of the blastocyst. In the mouse embryo, E-cadherin mediated adhesion initiates at compaction at the 8-cell stage, regulated post-translationally via protein kinase C and other signalling molecules. E-cadherin adhesion organises epithelial polarisation of blastomeres at compaction. Subsequently, the proteins of the epithelial tight junction are expressed and assemble at the apicolateral contact region between outer blastomeres in three phases, culminating at the 32-cell stage when blastocoel cavitation begins. Cell adhesion events also coordinate the cellular allocation and spatial segregation of the inner cell mass (ICM) of the blastocyst, and the maintenance of epithelial (trophectoderm) and non-epithelial (ICM) phenotypes during early morphogenesis
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The Field of Norms Functor and the Hilbert Symbol
No full textThe classical Hilbert symbol of a higher local field containing a primitive -th root of unity is a pairing , describing Kummer extensions of exponent . In this thesis we define a generalised Hilbert symbol and prove a formula for it. Our approach has several ingredients.
The field of norms functor of Scholl associates to any strictly deeply ramified tower a field of characteristic . Separable extensions of correspond functorially to extensions of , giving rise to .
We define morphisms which are compatible with the norms for every . Using these, we show that field of norms functor commutes with the reciprocity maps and constructed by Fesenko.
Imitating Fontaine's approach, we obtain an invariant form of Parshin's formula for the Witt pairing in characteristic . The `main lemma' relates Kummer extensions of and Witt extensions of , allowing us to derive a formula for the generalised Hilbert symbol , where is the -adic completion of
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
Micromagnetic modelling of magnetic domain walls and domains in cylindrical nanowires.
No full textFernandez-Roldan, J. A., Ivanov, Y. P., & Chubykalo-Fesenko, O. (2019). Micromagnetic modelling of magnetic domain walls and domains in cylindrical nanowires. arXiv preprint arXiv:1907.02318.[EN] Magnetic cylindrical nanowires are very fascinating objects where the curved geometry allows many novel magnetic effects and a variety of non-trivial magnetic structures. Micromagnetic modelling plays an important role in revealing the magnetization distribution in magnetic nanowires, often not accessible by imaging methods with sufficient details. Here we review the magnetic properties of the shape anisotropy-dominated nanowires and the nanowires with competing shape and magnetocrystalline anisotropies, as revealed by micromagnetic modelling. We discuss the variety of magnetic walls and magnetic domains reported by micromagnetic simulations in cylindrical nanowires. The most known domain walls types are the transverse and vortex (Bloch point) domain walls and the transition between them is materials and nanowire diameter dependent. Importantly, the field or current-driven domain walls in cylindrical nanowires can achieve very high velocities. In recent simulations of nanowires with larger diameter the skyrmion tubes are also reported. In nanowires with large saturation magnetization the core of these tubes may form a helicoidal (“corkscrew”) structure. The topology of the skyrmion tubes play an important role in the pinning mechanism, discussed here on the example of FeCo modulated nanowires. Other discussed examples include the influence of antinotches (“bamboo” nanowires) on the remanent magnetization configurations for hcp Co and FeCo nanowires and Co/Ni multisegmented nanowires.Peer reviewe
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
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