1,721,370 research outputs found
Frequency stabilization of a novel 1.5 um Er-Yb bulk laser to a 39K sub-Doppler line at 770.1 nm
No full textNonlinearity Cancellation in an Embedded Link with Asymmetrical Power Profiles: Experimental Demonstration of two new Techniques based on Optical Phase Conjugation
No full textCompensation of Nonlinearity in an Optical-Communication Link by using Optical Phase Conjugation
No full textSimultaneous Nonlinearity and Dispersion Compensation into an Embedded Link: Experimental Demonstration
No full textExperimental demonstration of nonlinearity and dispersion compensation in an embedded link by optical phase conjugation
No full textWe report in this letter, the experimental demonstration
of simultaneous dispersion and nonlinearity compensation in
an embedded link characterized by strongly asymmetrical power
profiles. This result is obtained by using a highly efficient optical
phase conjugator based on a periodically poled lithium-niobate
waveguide, combined with two small dispersion-compensating
elements properly inserted in the link
Compensation of nonlinear effects in optical communication systems through phase-conjugation
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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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