1,720,959 research outputs found
``COMPLETE'' GROUND STATE ROTATIONAL CONSTANTS OF FROM PERTURBATION ALLOWED TRANSITIONS IN THE BAND
No full text Supported by the Monticello Foundation administered by the California Institute of Technology. C. Chackerian, JR., and G. Guelachvili, J. Mol. Spectrosc. 84, 447-456 (1980).Author Institution:The highly accurate ground state constants previously from an analysis of allowed transitions in the band are augmented with values for and . The latter were determined via ground state combination differences between allowed and perturbation allowed transitions in the parallel and perpendicular components of the band. These ground state differences were obtained for levels with and
ABSOLUTE INTENSITIES OF THE AND BANDS OF
No full textAuthor Institution: NASA-Ames Research Center, Moffett Field; Universit\'{e} de Paris-Sud, Laboratoire d'Infrarouge Associ\'{e} au CNRSHigh resolution vibration-rotation absorption spectra of and D have been recorded in the region between and . The measurements were made with the two-meter optical path difference Michelson interferometer (which operates under vacuum conditions) at the Laboratoire d’Infrarouge. The intensities of individual lines were determined via measurements of their equivalent widths. Progress is repotted on the analysis of the observed ``local” and ``global” intensity perturbations
CONCENTRATION INDEPENDENT ABSOLUTE INTENSITY DETERMINATIONS:A NEW METHOD
No full text J. R. Oppenhelimer, Proc. Cambridge Phil. Soc. 23, 327 (1926). Address of Chackerian: NASA Ames Research Center, MS:245-6, Moffett Field, CA 94035.Author Institution:We discuss some general considerations for obtaining, independently of any information on molecular concentration, absolute intensity determinations from relative molecule. This new method exploits the effect, first elucidated sixty years , which vibration-rotation interaction has on relative rovibrational line intensities in a vibrational band. This approach is important for vibrational fundamental bands of diatomic molecules since they cannot be studies by the lifetime method which requires the radiative relaxation lifetime to be much shorter than competing collisional relaxation processes. Our new method should be particularly significant for diatomic radical species whose concentrations can be inferred only indirectly
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
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
VIBRATION-ROTATION INTERSITIES 07 SiO
No full textAuthor Institution:Dipole moment matrix have been computed for a large number of transitions of astrophysical interest for the more abundant isotopes of SiO. The wave functions utilized were obtained from a direct solution of the schrodinger equation with an accurate RKR potential. The dipole moment function, in the form of a Pad\’{e} approximant, was chosen to reproduce the experimental measurements near equilibrium, to have the proper united and separated atom limits, and to have the correct long-range asymptotic dependence on internuclear separation. Because of the large number of transitions involved, and to facilitate applications, the squares of the dipole moment matrix elements were fitted by as least squares procedure to polynomials in and u. In addition, Zinstein a coefficients are given for observed caser transitions and for selected vibrational bands. These latter are compared with previous calculations, and it is concluded that for the higher transitions, the present results represents a significant improvement."
INFRARED SPECTROSCOPY WITH AN OPTICAL PARAMETRIC OSCILLATOR: THE SHIFT AND STRENGTH OF THE (1) HYDROGEN LINE
No full textA.R.W. McKellar, Ap. J. 185, L53 (1973). A.R.W. McKellar. Can. J. Phys. 51, 389 (1973).""Author Institution: Ames Research CenterA tunable laser was used in combination with a 25-m base-path White cell and a 5-m spectrometer to obtain measurements of the equivalent width and frequency of the (l) line of hydrogen over the density range of one to four amagat. The long optical path permits ratioing (I/I) to be done with a single detector. The equivalent widths analyzed in terms of a Galatry line shape yield a line strength in excellent agreement with the ab initio calculations. The pressure shift of the (l) frequency is approximately twice that measured for the (l) line. This result indicates a perturbation of the vibrational force constant and is consistent with results obtained with hydrogen $deuteride.^{1,2}
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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