1,720,966 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
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
Energy storage in smart house
Full text linkHøgskulen på Vestlandet / Avdeling for Ingeniør og Naturfag/ Institutt for Ingeniør og teknologifag/ Automatiseringsteknik
Mineralogy and geochemistry of pegmatites in the Larvik Plutonic Complex, Norway
No full textPeculiar rocks consisting of large and rare minerals are known as nepheline syenite pegmatites and can be found in larvikite (national rock of Norway!) around the Larvik area. Detailed chemical analyses of a mineral called wöhlerite, which is rare on the global scale but common in the pegmatites, reveal a close relationship of the pegmatites to the host larvikite. These pegmatites have a unique internal structure of mineral distribution, and may be distinguished based on their mineral assemblages. Boron isotopic composition of tourmaline and hambergite reveal that external fluids have interacted with the early melt. Such boron isotope data is particular interesting for the research community, because they represent a unique geochemical system where boron isotopes are poorly studied. Furthermore, this study developed hambergite as a new host for boron isotopes. Studies of how these pegmatites form is important scientifically to develop our understanding of these geological systems, and commercially because this group of rocks are potential sources for important strategic elements
Tendering Ferry Services in Norway: Ratchet Effects?
Full text linkFjord crossings by ferries are vital in the Norwegian trunk road system. The ferries are operated by ferry companies, each ferry company being a monopolist on a bundle of crossings. The government regulates prices and service frequencies and awards subsidies to the companies in order to make the ferry services economically viable. Tendering has been suggested as a means to induce cost efficiency and thus reduce costly subsidies. In order to gain experience with tendering on this area, this regime has recently been introduced on a few selected crossings. We argue that this small-scale experiment may not reveal the cost savings that may be obtained by a large-scale experiment. This is due to a ratchet effect: The incumbent ferry companies may not have the incentives to submit low tenders as by doing so, the ferry companies reveals that there is much to gain for the government by carrying through a large-scale tender competition in the future. Such a large-scale tender competition may be harmful to the companies as compared to status quo. Realising this, each company may be reluctant to submit low tenders in the competition for the selected tender crossings.Institute of Transport and Logistics Studies. Faculty of Economics and Business. The University of Sydne
Mineralogy and petrology of the amazonite pegmatite at Bakstevalåsen, øvre Eiker
No full textAn exotic pegmatite classified as a rare-element gadolinite type amazonite pegmatite is situated in Paleozoic sedimentary rocks, and associated with the peralkaline ekerite granites in the Permian Oslo Region. The amazonite pegmatite is approximately 16 meters long and consists of a coarse-grained, subhedral, green microcline feldspar (amazonite), quartz and danalite. Fine grained fabric with abundant sulphides intersect the coarse grained amazonite several places, and indicates a second generation of mineralization. The danalite has a strong reddish color with an intermediate composition of zinc and iron, i.e. composition along the danalite – genthelvite solid-solution series. Abundant pristine subhedral to euhedral phenakite coexist with danalite, and a boron zone in the pegmatite interior contains abundant danburite, tourmaline, and minor nordenskiöldine. Additional löllingite, gadolinite-(Y), biotite, zircon, columbite-(Fe), pyrochlore group minerals, and fluorite occur throughout the pegmatite body. Other pegmatites in the area contain primarily amphibole, pyroxene, microcline, and quartz. Major element variation of the amazonite pegmatite and its neighbor pegmatites correlate; however, trace-element evolution trends diverge in respect to REE, Nb, Y, and Ta. The amazonite pegmatite is clearly enriched in HREE relative to LREE, while Y, Nb, and Ta contents are significantly higher in the amazonite pegmatite than other pegmatites in the area. This evidence, in conjunction with the high boron- and sulphur-content, indicates an enrichment of the original NYF magma by circulating hydrothermal fluids, and chemical exchange with the sedimentary wall-rocks
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