5,496,099 research outputs found
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
Notes in Field: MTA from Harvard Sq to Washington St. Elevated from Winter St. to Northampton.
No full textNotes on a field trip from Boston City Hospital to Old North Church, by foot,
Monday, 25 June, conducted as part of the Perceptual Form of the City, a research
project investigating the individual’s perception of the urban landscape
Optimal E-Field Vector Combination for a Highly Focused Antenna-Array
No full textA near-field highly focused circular phased-array antenna for 5.8-GHz radio frequency identification (RFID) applications is presented. The electric field (E-field) at the focus is enhanced by a constructive vector combination in a three-dimensional (3-D) coordinate system. The array dipoles of the antenna are oriented to enhance the energy confinement at the focus, and the radii of the circular array is optimized for lower sidelobe levels. As a result, the proposed design achieves an enhanced focalization of ~4 dB with reduced sidelobe levels of ~12dB compared to earlier designs
Andrew Field papers
No full textAndrew Field (1938- ) is a scholar, translator, and author, who has published translations of Russian literature, critical studies, biographies, fiction, essays, and travel articles. He holds degrees from Columbia University as well as a Ph.D. from the University of Queensland, Brisbane, Australia. From 1977 to 1979, he was a professor at Griffith University, Brisbane, Australia. Dr. Field's papers consist of materials relating to the writing of his 1983 study of the life and work of Djuna Barnes, Djuna: the Formidable Miss Barnes (alternately entitled Djuna: The Life and Times of Djuna Barnes). Included in the collection are correspondence, manuscripts, research notes, clippings related to the book's publication and reception, and photographs. Also included is a handwritten manuscript of a poem by Barnes
Nonhelical inverse transfer of a decaying turbulent magnetic field
No full textIn the presence of magnetic helicity, inverse transfer from small to large scales is well known in magnetohydrodynamic (MHD) turbulence and has applications in astrophysics, cosmology, and fusion plasmas. Using high resolution direct numerical simulations of magnetically dominated self-similarly decaying MHD turbulence, we report a similar inverse transfer even in the absence of magnetic helicity. We compute for the first time spectral energy transfer rates to show that this inverse transfer is about half as strong as with helicity, but in both cases the magnetic gain at large scales results from velocity at similar scales interacting with smaller-scale magnetic fields. This suggests that both inverse transfers are a consequence of a universal mechanisms for magnetically dominated turbulence. Possible explanations include inverse cascading of the mean squared vector potential associated with local near two-dimensionality and the shallower k^2 subinertial range spectrum of kinetic energy forcing the magnetic field with a k^4 subinertial range to attain larger-scale coherence. The inertial range shows a clear k^{-2} spectrum and is the first example of fully isotropic magnetically dominated MHD turbulence exhibiting weak turbulence scaling
Notes in Field - Functional Trip
No full textNotes on a trip from Massachusetts General Hospital to South Station as quickly as possible. These notes were collected as part of the Perceptual Form of the City, a research project investigating the individual’s perception of the urban landscape
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