1,720,972 research outputs found
High resolution FTIR specytroscopy of CH2DF: analysis of the v3 and v4 interacting bands
No full textHigh-resolution infrared spectrum of CH2DF: analysis of the v5/v6/v9 triad
No full textThe very weak v9 fundamental band (1132.78 cm-1) of CH2DF has been studied for the first time at high resolution (0.004 cm-1) by FTIR spectroscopy. This mode of A'' symmetry species produces a special a-type band, induced by Coriolis coupling with v5 (1055.54 cm-1, A' species), following the selection rules DKa=0 and DKc=0, +/-2. The v5 level has, in turn, been found to be coupled with v6 (938.30 cm-1, A' species) through c-type Coriolis and higher-order vibrational resonances. The three bands were treated as a unique band system using the Watson A-reduced Hamiltonian in the Ir representation and five coupling constants; in this way the assigned transitions could be fitted within their experimental accuracy. The analysis yielded the first accurate set of spectroscopic parameters for v9, while the values determined for v5 and v6 represent a significant improvement on those reported previousl
Book of Abstracts - High-resolution infrared study of the nearly degenerate vibrational levels v4 and v8 of CH2D35Cl
No full textPoster B1
High resolution FTIR Spectroscopy of CH2D35Cl: analysis of the nearly degenerate v4 and v8 levels
No full textThe high-resolution (0.005 cm1) FTIR spectrum of CH2D35Cl has been investigated between 1160 and
1360 cm1, the region of the v4 (A') and v8 (A'') fundamentals. The v4 mode is expected to show an a/b-hybrid
band, whereas v8 should generate a pure c-type envelope. The rovibrational levels (Dv0 for the deperturbed band
centres is 0.66 cm-1 only) interact through a-and b-type Coriolis resonances. As a result, the P branch of the
v4 b-type component and the R branch of the v8 c-type band are missing. In addition, the v8 mode gives rise to a
weak pseudo a-type component still deriving from interaction with v4. Because of closeness of the two vibrational
states, several DKa=0 crossings occur between sublevels of different parity. The data set, composed of 3641
transitions of v4 and 2624 of v8, was fitted using Watson’s A-reduction Hamiltonian in the Ir representation
implemented with first and higher order a- and b-Coriolis coupling terms. Accurate upper state molecular
constants, including all quartic centrifugal distortion parameters, and six coupling coefficients have been
determined
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
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