1,720,962 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
A Marine Autonomous Surface Craft for Long-Duration, Spatially Explicit, Multidisciplinary Water Column Sampling in Coastal and Estuarine Systems
Get PDFThe Surveying Coastal Ocean Autonomous Profiler (SCOAP) is a large catamaran marine autonomous surface craft (MASC) for unattended weeks-long, spatially explicit, multidisciplinary oceanographic water column profile sampling in coastal/estuarine waterbodies. Material transport rates/pathways, crucial to understanding these ecosystems, are typically poorly known. SCOAP addresses demanding spatiotemporal sampling needs and operational challenges (strong currents, open coastal sea states, complex bathymetry, heavy vessel traffic). Its large size (11-m length, 5-m beam) provides seaworthiness/stability. The average speed of 2.5 m s−1 meets the representative goal to traverse an 18-km transect, sampling 10 min at each of 10 stations 2 km apart, nominally 4 times daily. Efficient hulls and a diesel–electric energy system can provide the needed endurance. The U.S. Coast Guard guidelines are followed: lighting, code flags, the Automatic Identification System (AIS), and collision avoidance regulations (COLREGs)-based collision avoidance (CA) by onboard autonomy software. Large energy reserves obviate low-power optimization of sensors, enabling truly multidisciplinary sampling, and provide on-demand propulsion for effective CA. Vessel stability facilitates high-quality current profile observations and will aid engineering/operation of the planned winched profiling system, performance of an anticipated radar system to detect/track non-AIS vessels, and potential research-quality meteorological sensor operation. A Narragansett Bay test deployment, attended by an escort vessel, met design goals; an unattended open coastal deployment is planned for Rhode Island Sound. Scientific and operational strengths of large catamaran MASCs suggest they could be an important cost-effective complement to other sampling platforms (e.g., improved spatiotemporal coverage and resolution, extending farther inshore, with a broader range of sensors, compared to underwater gliders) in coastal/estuarine waters
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
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
Observations and physics of amplified subinertial tidal currents in stratification and mean shear flow at a seamount
No full textThesis (Ph. D.)--University of Washington, 1996Three-dimensional structure of amplified diurnal tidal currents (subinertial, 0.69f) at Cobb Seamount (130.8\sp\circ W, 46.8\sp\circ N), collected by ship-mounted Acoustic Doppler Current Profiler, agrees well with a stratified seamount-trapped wave resonant at 0.70f. The wave solution incorporates measured bathymetry, stratification, and baroclinic mean clockwise current, with parameterized damping of 2-day timescale based on observed dissipation. Physics and observable signatures of damping and mean flow on a wave are explained, including critical surface formation in mean shear.Observed diurnal currents propagate clockwise with first azimuthal wavenumber. Amplification extends a few km radially and about 100 m vertically from the seamount, reaching 5.3 times open-ocean K\sb1 currents. Characteristics are clockwise rotation in time, in narrow ellipses oriented nearly along isobaths with radial and azimuthal components positively correlated, and anticlockwise turning with depth such that phase propagates downward.Understanding of stratified seamount-trapped waves is extended in three ways. First, physics are explained using short topographic Rossby waves in stratification, or stratified slope-Kelvin waves. An inviscid stratified seamount-trapped wave superposes azimuthally resonant up- and down-going stratified slope-Kelvin waves, causing standing cross-slope (radial and vertical) structure. Second, observable signatures are described, including symmetries in inviscid-wave current patterns inconsistent with the measurements. A forced damped wave transports energy toward the summit where dissipation occurs, breaking cross-slope standing-wave symmetries, and exhibits flow characteristics similar to all those observed at Cobb. Third, because clockwise bottom-intensified mean flow is observed, waves linearized about a representative baroclinic azimuthal current are examined. Mean flow shifts the resonant frequency very weakly, because Doppler shifting is counteracted by the potential vorticity gradient of mean horizontal shear variations, and distorts wave structure weakly also.Stronger mean flow causes singularities at low (high) subinertial frequencies: stratified seamount-trapped wave (internal wave) critical surfaces. An internal wave critical surface bounds a superinertial cap, where subinertial motions are effectively superinertial. Though too weak at Cobb, mean flow at Fieberling Guyot (32.4\sp\circ N, 127.8\sp\circ W) forms an internal wave critical surface in diurnal currents (0.93f) that is coincident with high turbulence levels
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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