1,720,960 research outputs found
Al³+ ? He: stability and spectroscopy
No full textThe complex between the trication, Al3+, and a helium atom is investigated using high-level ab initio calculations. In addition, the avoided crossing between the ground state Al3+-He potential energy curve, and the lowest repulsive charge transfer state, Al3+...He+, is investigated using CASSCF + MRCI calculations: it is found that the avoided crossing is very sharp. Vibrational and rotational spectroscopic parameters are calculated. It is concluded that the Al3+-He complex is kinetically stable and should be observable
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
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
The Chemistry of Superheavy Elements
No full textFull text is available to authenticated members of The University of Auckland only.The study of the chemistry of superheavy elements through the application of theoretical teehniques is discussed. Parameters of relativistic, nonrelativistic and spin-orbit coupled pseudopotentials of elements 111 to 120 and accom-panying basis sets are presented. The nuclear stability of superheavy nuclei and the experimental investigation of the chemistry of these elements are briefly summarised. Relativistic molecular electronic structure techniques are reviewed with particular emphasis on their application to super-heavy elements. Relativistic effects on the properties of atoms are described. These effects are used to compare and explain the lanthanide and actinide contractions. Bonding theory in atoms of jj-coupled orbitals is described in detail. The properties of several compounds of elements 111, 112, 113 ,and 114 are calculated and discussed. Particular attention is paid to molecular geometries, bonding and the relative stability of the various oxidation states of each element. The behaviour of, each element is generally in accord with its predicted position in the periodic table. Pseudopotential results are found to be in excellent agreement with all-electron data for element 111 and in good agreement with all-electron results for elements 113 and 114. Relativistic effects are found to be very large for almost all molecules considered
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
The road to Assisi
No full textA brief history of earlier meetings on relativistic theories of atoms, molecules and solids since 1969 is told. The REHE meetings (Relativistic Effects in Heavy-Element Chemistry and Physics) range from REHE-1 in 1993 to the REHE-13 at Assisi in 2022. They were started during the ESF (European Science Foundation) programme REHE in 1993-1997 and continued as an independent series after it.Peer reviewe
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