112,794 research outputs found
The influence of a submicrometre antidot array on the vortex topology and the pinning mechanisms in layered superconductors
No full textRole of boundary conditions in improving the working characteristics of superconductor-based nanostructures
No full textauthor-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
Critical temperature and interface transparency of N/S/N triple layers: theory and experiment
No full textThe influence of the finite transparency, , of superconductor/normal metal (S/N) interface on the critical temperature of proximity coupled layered structures is investigated in the dirty limit on the basis of the microscopic equations solved exactly by a matrix method. The calculated theoretical curves satisfactory reproduce the experimental dependencies of the critical temperature on the thickness of the superconducting layers in N/S/N trilayers. The relation between the transparency coefficient and the normal metal coherence length is also discussed. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 200674.45.+c Proximity effects; Andreev effect; SN and SNS junctions, 74.78.Fk Multilayers, superlattices, heterostructures,
PROXIMITY EFFECT AND INTERFACE TRANSPARENCY IN NB/CU MULTILAYERS
No full textThe interface transparency T is quantitatively studied in Nb/Cu multilayers. The dependence of the critical temperature Tc on both the thickness of superconducting layers dS in Cu/Nb/Cu trilayers and on the number of Nb/Cu bilayers Nb in Cu/[Nb/Cu]Nb multilayers is considered. The experimental results are analyzed on the base of the exact solution of Usadel equations. We obtain that there is an infinite number of pairs of (T, N) (N being the normal metal coherence length) which describes the measured Tc(dS) dependence with the same accuracy. This degeneracy is removed if the experimental Tc(Nb) dependence is analyzed. This allows to unambiguously determine, without the need of an independent estimation of N, the value of T for our system. This general method turns out to be especially useful when dealing with superconducting/ normal metal hybrids for which microscopic parameters are not well determined
Change of desigu of the shredder-distributor
No full textThe main results of the review of existing methods, methods, equipment for grinding, distribution of coarse forages, including rolled feed, on cattle–breeding farms are given in the article. This allows us to identify the main factors affecting the productivity of grinders — distributors and the quality of supply of finished material to feeders. On the basis of research works and analysis of existing technical means for the preparation and distribution of coarse forages, we propose a constructive technological scheme for a mobile shredder–distributor with a longitudinal arrangement of a knife–type working organ. Analysis of mobile shredders and distributors revealed that they should provide loading in the places of storage of coarse forages, transportation, grinding and dispensing in the feeding zone. The technical tool that performs the totality of the above operations is a dynamic system that operates under conditions of changing external influences. The model of the shredder–distributor functioning is proposed, which can be calculated with incoming variables that determine the conditions of its operation: feeding feed roll, which can be changed if necessary, as well as the physical and mechanical properties of the material, mainly density and humidity, which are uncontrollable factors and are monitored in advance experiments
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
Electric transport properties and critical characteristics of of Superconductor/Ferromagnet nanostructures
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Variations on the Author
No full text“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
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