1,720,992 research outputs found
Topical issue on Novel Quantum Phases and Mesoscopic Physics in Quantum Gases
No full textThis topical issue of The European Physical Journal B
is a collection of
articles originating from the Fourth
International Workshop
``Theory of Quantum Gases and Quantum Coherence''
and of the CNRS Ecole Thematique ``Physique M\'esoscopique avec les gaz quantiques'' held in Grenoble (France)
from June the 3rd to June the 7th 2008.
This event has involved mainly students and young researchers both as speakers and participants, each session being opened by an overview lecture
given by senior researchers expert in the fields of quantum gases and condensed matter.
Since the achievement of Bose-Einstein condensation (BEC) and
superfluidity with atomic Fermi gases, ultracold quantum gases
have become a very versatile testing ground for quantum many-body
theories. The amazing experimental possibilities which allow
changing the dimensionality of the system, introduce disorder in a
controlled way, and create a whole variety of strongly correlated
states, have made the connection between the physics of ultracold
quantum gases and condensed-matter physics stronger and stronger.
This connection has been especially taken in consideration in the
selection of contributions for the conference. In addition,
attention has been also devoted to the recent activities devoted
to the realization of BEC in other condensed matter systems (eg
polaritons, magnons in Helium-3), which create further links to
the condensed matter community.
A topic of major relevance at the moment concerns the presence of
disorder, both for light and matterwaves. The very recent
realization of Anderson localisation of non interacting
matter-waves with Bose-Einstein condensates in
quasi-one-dimensional geometries, opens up the very promising
possibility of understanding the problem of disorder in the
presence of interactions and/or in higher dimensionality.
Using optical lattices it is also possible to create several
geometries suited to the study of low dimensional systems, quantum
phase transitions, and the creation of supersolid and paired
phases of matter. Especially fascinating results arise from the
possibility of tuning the atomic interactions. Use of
Fano-Feshbach resonances to change the magnitude and sign of the
s-wave scattering length, has allowed, e.g., the observation of
collapsing Bose condensates and of the crossover from a BEC to a
Bardeen-Cooper-Schrieffer-type transition. More recent experiments
have demonstrated that the range of the interactions can also be
manipulated. Dipole interactions with long-range anisotropic
character have been observed in Cr atoms and this has opened
up a rich and active research field. The reduced
dimensionality has also become a very useful tool for making
possible the realization of the Berezinskii-Kosterlitz-Thouless
superfluid phase transition occuring in two-dimensional systems.
The target list of the present topical issue includes various
contributions on the subjects above but also contributions on the
quantum magnetic phases of atoms in optical lattices (ordered or
spin liquids), the problem of spin squeezing in a bimodal
condensate, and the static properties of Bose-Fermion mixtures.
Many of these systems pose longstanding theoretical and
experimental condensed matter questions, which might find in
ultracold atomic systems a first non controversial answer
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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