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
OMPS-NPP L2 LP USask Ozone (O3) Vertical Profile swath daily V1.1
No full textThe USask OMPS-LP L2 2D Ozone v1.1 product provides ozone profile retrievals performed at the University of Saskatchewan for the central slit of the Ozone Mapping and Profiler Suite Limb Profiler (OMPS-LP) instrument on the Suomi-NPP satellite. The two-dimensional retrieval algorithm accounts for variation in the along orbital track dimension, retrieving an entire orbit simultaneously instead of treating each image independently. Ozone is retrieved from the thermal tropopause to 59 km on a 1 km grid with a vertical resolution of approximately 2 km.
Each granule contains data from the daylight portion of each orbit measured for a full month. Spatial coverage is global (-82 to +82 degrees latitude), and there are about 14.5 orbits per day, each has typically 160 profiles with an along orbital track sampling of 125 km. The files are written using NetCDF4.Global coverag
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
The SASKTRAN Thermal Infrared Radiative Transfer Model with Analytic Jacobian Calculations
Get PDFThe SASKTRAN radiative transfer framework is a set of software tools for modelling the propagation of electromagnetic radiation through the atmosphere. It is an important tool in modelling the measurements made by remote sensing instruments in order to retrieve information about the structure and composition of the atmosphere from observations of spectral radiance. The primary goals of this thesis are to expand the capabilities of SASKTRAN to modelling the infrared spectral regime and test this new suite of modelling software for use with real atmospheric remote sensing data. This model will be used to retrieve information on the concentrations of greenhouse gases from measurements made by the Limb Imaging Fourier transform spectrometer Experiment (LIFE), a remote sensing instrument developed at the University of Saskatchewan.
The Thermal InfraRed (TIR) model, developed in this thesis, incorporates the absorption and emission of radiation from greenhouse gases to solve the radiative transfer problem. The fundamental output of this model is the spectral radiance that is incident on an observer positioned at a given location and looking in a given direction through the atmosphere. Radiative transfer is a non-linear problem and complex inverse methods are needed to determine atmospheric composition from instrument measurements. The inversion requires the computation of Jacobians, which quantify how the spectral radiance changes when changes are made to the atmospheric state parameters. Analytic Jacobian calculations are implemented in the TIR model and simultaneously calculated alongside the modelled radiance. With analytic calculations significant computational savings are achieved because the model does not need to be executed for each parameter that is changed. The TIR model supports the computation of analytic Jacobians for vertical profiles of greenhouse gas composition and temperatures.
Fourier Transform Spectrometers (FTS) measure interferograms of light that are converted into radiances via Fourier transform. LIFE employs the FTS technique to measure vertical images of atmospheric spectral radiance in the thermal infrared regime. This instrument is a primary motivation for the development of the TIR model, which is to be implemented to retrieve information about the vertical composition of greenhouse gases such as methane, water vapor, ozone, and nitrous oxide. In this thesis the TIR model is used to simulate LIFE measurements and demonstrate the feasibility of retrieving greenhouse gas profiles with the aid of analytic Jacobian calculations
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
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
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