1,720,962 research outputs found
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
THE MICROWAVE SPECTRUM OF DIFLUOROPHOSPHINE
No full textAuthor Institution: Department of Chemistry, University of MichiganEighteen transitions have been assigned for . The rotational constants are: . The spectrum of is currently being measured and assigned. The detailed structure of this pyramidal molecule will be 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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Structure and dynamics of argon complexes with formic acid and acetaldehyde.
No full textThe argon-formic acid and argon-acetaldehyde van der Waals dimers were studied by Fourier transform microwave spectroscopy. The structure of argon-formic acid was found to be planar, with the argon attracted to the acidic hydrogen and carbonyl oxygen. This was determined from assigning the rotational spectrum of three isotopic species: normal, ArDCOOH, and ArH\sp{13}COOH. The distance from the argon to the carbonyl oxygen was 3.71(3) A, to the acidic hydrogen 2.81(2) A, and to the center of mass of formic acid 3.732(1) A. The deuterium quadrupole coupling constants were determined for d\sb1-formic acid (DCOOH) complex as \chi\sb{aa} = 135(2) kHz, \chi\sb{bb} = 75(2) kHz. The dipole moment was also determined, as = 1.30501(82) D. A dispersive model proposed by Kisiel was successfully tested to rationalize the structural and dipole moment data. The binding energy of the dimer was estimated to be 144.4(45) cm\sp{-1} from centrifugal distortion data and a Lennard-Jones potential. The microwave spectrum of argon-acetaldehyde was also assigned. The asymmetric top rotational transitions were split into quartets. This resulted from two large amplitude motions hindered by barriers resulting in tunneling splittings. These motions were assigned to the methyl top internal rotation, and to an inversion through a planar configuration. The structure was determined by assigning the spectrum of the normal isotopic species and argon-acetaldehyde-d\sb1. The distances defining the argon position were: 3.59(1)A from the carbonyl oxygen, 3.771(5) A from the carbonyl carbon, 3.85(1) A from the methyl carbon, and 3.592(5) A from the center of mass of acetaldehyde. The dipole moment was also measured as 2.629(18) D. The binding energy was estimated as 203.9(10) cm\sp{-1}. The above mentioned dispersive model, applied for argon-acetaldehyde, predicted a skewed nonplanar structure in reasonable agreement with the spectroscopic data. In order to study the tunneling dynamics, the Internal Axis formalism, developed by Hougen and Coudert for multidimensional tunneling was extended to the case involving a methyl group internal rotation and an inversion motion. The group theory and tunneling dynamics were analyzed for the G\sb6 permutation-inversion group. A phenomenological Hamiltonian was developed and a program was written to fit the spectrum. The 220 transitions were fit to 19 parameters with 110 kHz standard deviation. The tunneling frequencies were determined, as well as details of the Coriolis interaction between the overall rotation and the large amplitude vibrations.PhDPhysicsUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/103780/1/9409717.pdfDescription of 9409717.pdf : Restricted to UM users only
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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