1,721,025 research outputs found
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
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
The East African Rift System
No full textThe East African Rift System (EARS) is the iconic continental rift and is now recognized as a profoundly interconnected system, extending from the core-mantle boundary to Earth's surface. Markedly broad, low seismic wavespeeds extend from the core-mantle boundary into the upper mantle and reveal thermochemically anomalous material of the African Superplume. This dominates the upper mantle and impacts melt generation and rifting processes. Associated flood basalt volcanism commenced during the Eocene and was accompanied by rifting. Rift maturity varies from embryonic fault-controlled rifting in the south with classic graben and half graben geomorphology. Further north the locus of extension has migrated to narrower zones of magma intrusion that may eventually mark a new mid-ocean ridge. The EARS shows us that magmatic extension commences well before the development of an ocean basin, with important implications for stretching factors and subsidence at rifted margins. With increasing urbanization, research of rifting in East Africa has implications for volcanic and seismic hazards and climate change through CO 2 release. Geothermal energy too is a growing field with important socio-economic implications for a fast-growing population. This contribution provides a succinct re of the EARS in the context of the multi-scale interconnections of the rift system.</p
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
Paleoshorelines as Deformation Markers for Magmatic Related Faulting at Whakaipō Bay, Lake Taupō
No full textThe Taupō Volcanic Zone (TVZ) is a volcanic arc associated with the continental intra-arc rift, the Taupō Rift, located in the North Island of New Zealand. The Central TVZ is characterised by voluminous rhyolitic volcanism that has produced large, caldera-forming eruptions. This study investigates the impact that the caldera-forming Taupō 232 ± 10 CE eruption had on faulting, and thus rifting, in nearby regions of the Taupō Rift. After the 232 CE eruption Lake Taupō’s water level rose then fell, leaving behind paleoshoreline terraces that can be mapped in the present day to constrain the nature of deformation around the lake over the last 1800 years. At Whakaipō Bay on the north shore of Lake Taupō and surrounding bays to the northeast, normal faults and paleoshorelines were mapped using a LiDAR digital elevation model (DEM) and field techniques. Two faults were the main focus in this study, the West Whakaipō Fault and Whakaipō Fault. These faults hold significance as they are proximal to the Taupō caldera and displace the 232 CE Taupō ignimbrite and associated paleoshoreline deposits, which act as critical time markers that provide constraints on the timing and rates of fault displacements. Based on the vertical displacements obtained on the Taupō ignimbrite and paleoshoreline deposits, and an examination of paleoshoreline morphologies around the observable faults, this study reveals the history of faulting at Whakaipō Bay for the ~20 year period immediately after the 232 CE eruption, and also up to the present day. Since the Taupō 232 CE eruption, it is estimated that the Whakaipō Fault has accrued a total vertical displacement of 12.8 ± 0.44 m; however, ~75% of this displacement accumulated in the 20 year time period immediately after the 232 CE eruption. The close temporal association between large-scale faulting and the 232 CE eruption highlights the significant affect that large-scale volcanic eruptions can have on surrounding extensional fault systems, suggesting that silicic volcanism may trigger continental rifting events in the Taupō Volcanic Zone
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