1,720,958 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
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
Generator-level acceptance for the measurement of the inclusive cross section of W-boson and Z-boson production in pp collisions at = 5 TeV with the CMS detector at the LHC
No full textThe inclusive cross section of vector boson production in proton-proton collisions is one of the key measurements for constraining the Standard Model and an important part of the physics program at the LHC. Measurement of the inclusive cross section requires calculating the detector acceptance of decay products. The acceptance of the CMS detector of leptonic decays of W and Z bosons produced in pp colisions at = 5 TeV is calculated using Monte Carlo event simulation. Statistical and systematic uncertainties on the acceptance measurement from PDF and uncertainty and higher-order correction are reported. The use of the calculated acceptance in combination with measurements of detector efficiency, luminosity, and particle counting to determine the inclusive cross section is outlined. A total integrated luminosity of 331.64 pb from 2015 and 2017 CMS data at = 5 TeV is available for the calculation of the inclusive cross section
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Turbulent Mixing in the Ocean Surface Boundary Layer
Full text linkTurbulent mixing in the ocean surface boundary layer (OSBL) mediates the transfer of energy, momentum, and gases between the atmosphere and the ocean. While the dynamics that drive these exchanges happen on small lateral and vertical scales relative to the size of the ocean, they are crucial in setting the behavior of Earth’s climate on global scales. Historically, small-scale processes near the ocean’s surface have been difficult to observe. Using novel measurements of the OSBL enabled by advances in instrumentation and multi-platform observational techniques, this thesis investigates specific OSBL turbulent dynamics. The onset and growth of Langmuir circulations (LCs) is observed from simultaneous airborne infrared imagery of sea surface temperature and subsurface in-situ measurements. For weak, fetch-limited wind wave forcing with stabilizing buoyancy forcing, LCs appear non-uniformly in space. During a period of LC growth and diurnal warm layer (DWL) deepening, subsurface temperature structures show temperature intrusions into the base of the DWL of the same scale as bubble entrainment depth during the deepening period. A large-eddy simulation run with observed initial conditions and forcing reproduces the onset and rate of DWL deepening, but exhibits coherent temperature structures with a larger aspect ratio than in observations, with large sensitivity to the numerical representation of surface radiative heating. At the base of the mixed layer, a drifting thermistor chain is used to observe temperature fluctuations consistent with turbulence in a stratified shear layer resulting from a mixture of Kelvin-Helmholtz and Holmboe instabilities. The size and frequency of these structures depends on the surface forcing regime, defined by the balance of wind-shear, wave-shear, and convective turbulent kinetic energy production. Thorpe scale estimates of dissipation and entrainment are consistent with the observed rate of mixed layer deepening, while the outer vertical scale of the turbulent region is correlated with the wind forcing magnitude. Below the mixed layer, observations of velocity from an array of drifting profiling instruments are used to relate spatial gradients in near-inertial wave energy flux to array-scale lateral vorticity gradients. These unique observational studies can aid in improving future numerical simulations and parametrizations used in global climate simulations
Generator-level acceptance for the measurement of the inclusive cross section of W-boson and Z-boson production in pp collisions at [square root of] s = 5 TeV with the CMS detector at the LHC
No full textThesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2018.Cataloged from PDF version of thesis.Includes bibliographical references (pages 39-42).The inclusive cross section of vector boson production in proton-proton collisions is one of the key measurements for constraining the Standard Model and an important part of the physics program at the LHC. Measurement of the inclusive cross section requires calculating the detector acceptance of decay products. The acceptance of the CMS detector of leptonic decays of W and Z bosons produced in pp colisions at [square root of]s = 5 TeV is calculated using Monte Carlo event simulation. Statistical and systematic uncertainties on the acceptance measurement from PDF and a, uncertainty and higher-order correction are reported. The use of the calculated acceptance in combination with measurements of detector efficiency, luminosity, and particle counting to determine the inclusive cross section is outlined. A total integrated luminosity of 331.64 pb-1 from 2015 and 2017 CMS data at [square root of]s = 5 TeV is available for the calculation of the inclusive cross section.by Alexander AndriatisS.B
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