1,721,160 research outputs found
Franck-Condon simulation of the single-vibronic-level emission spectra of HPCI/DPCl and the chemiluminescence spectrum of HPCI, including anharmonicity
No full textRestricted-spin coupled-cluster single-double plus perturbative triple excitation [RCCSD(T)] potential energy functions (PEFs) were calculated for the (X) over tilde (2)A" and (A) over tilde (2)A'states of HPCl employing the augmented correlation-consistent polarized-valence-quadruple-zeta (aug-cc-pVQZ) basis set. Further geometry optimization calculations were carried out on both electronic states of HPCl at the RCCSD(T) level with all electron and quasirelativistic effective core potential basis sets of better than the aug-cc-pVQZ quality, and also including some core electrons, in order to obtain more reliable geometrical parameters and relative electronic energy of the two states. Anharmonic vibrational wave functions of the two states of HPCl and DPCl, and Franck-Condon (FC) factors of the (A) over tilde (2)A'-(X) over tilde (2)A" transition were computed employing the RCCSD(T)/aug-cc-pVQZ PEFs. Calculated FC factors with allowance for Duschinsky rotation and anharmonicity were used to simulate the single-vibronic-level (SVL) emission spectra of HPCl and DPCl reported by Brandon et al. [J. Chem. Phys. 119, 2037 (2003)] and the chemiluminescence spectrum reported by Bramwell et al. [Chem. Phys. Lett. 331, 483 (2000)]. Comparison between simulated and observed SVL emission spectra gives the experimentally derived equilibrium geometry of the (A) over tilde (2)A' state of HPCl of r(e)(PCI)=2.0035 +/- 0.0015 Angstrom, theta(e) = 116.08 +/- 0.60degrees, and r(e)(HP) = 1.4063 +/- 0.0015 Angstrom via the iterative Franck-Condon analysis procedure. Comparison between simulated and observed chemiluminescence spectra confirms that the vibrational population distribution of the (A) over tilde (2)A' state-of HPCl is non-Boltzmann, as proposed by Baraille, et al. [Chem. Phy. 289, 263 (2003)]
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
[Schauspielhaus Düsseldorf] / Sappho : Dienstag, den 19. März 1912 ; Serie III ; Trauerspiel in fünf Aufzügen
No full textvon Franz Grillparzer. Regie: Dr. Reinhard Bruck. Personen: Emma Boic, Peter Esser, Hildegard Osterloh, Ilse Wehrmann, Arthur Ehrens, Hermann Stoll
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
[Schauspielhaus Düsseldorf] / Sappho : Samstag, den 24. Februar 1912 ; Trauerspiel in fünf Aufzügen
No full textvon Franz Grillparzer. Regie: Dr. Reinhard Bruck. Personen: Emma Boic, Peter Esser, Hildegard Osterloh, Ilse Wehrmann, Arthur Ehrens, Hermann Stoll
[Schauspielhaus Düsseldorf] / Sappho : Mittwoch, den 6. März 1912 ; Trauerspiel in fünf Aufzügen
No full textvon Franz Grillparzer. Regie: Dr. Reinhard Bruck. Personen: Emma Boic, Peter Esser, Elsa Dalands, Ilse Wehrmann, Arthur Ehrens, Hermann Stoll
[Schauspielhaus Düsseldorf] / Sappho : Freitag, den 12. April 1912 ; Serie V ; Trauerspiel in fünf Aufzügen
No full textvon Franz Grillparzer. Regie: Dr. Reinhard Bruck. Personen: Emma Boic, Peter Esser, Hildegard Osterloh, Ilse Wehrmann, Franz Everth, Hermann Stoll
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