1,720,996 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
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
Numerical Simulation of Landslide Impulsive Waves by WC-MPS Method
No full textA Thesis Submitted to the Faculty of Graduate Studies and Research In Partial Fulfillment of the Requirements for the Degree of Master of Applied Science in Environmental Systems Engineering, University of Regina. XVIII, 130 p.Numerical simulation has been widely used and becomes a major approach for
solving engineering related problems in the past few decades. Because of the flexibility,
efficiency and compatibility of numerical simulation, it has been involved in various
engineering and science areas. This approach is capable of interpreting the natural
phenomena, and also offering an alternative way of theoretical studies and experiments.
In hydrodynamic simulations, there are two kinds of approaches have been
established. The traditional mesh-based methods (e.g., finite element and finite volume
method) that have been the dominant methods for decades but not capable of large
deformations and fragmentations in the case of free surface flow . Another kind of the
major approaches, the mesh-free methods, according to which variables are assigned to
particles instead of mesh, are applied to solve both the problems of mash distortion for
flowing mesh and the problems of unclear interface for fixed mesh. Mesh-free methods
provide a physical system for hydrodynamic problems, and also the effectiveness of this
kind of method has been validated/confirmed in many applications. Therefore the
mesh-free methods have become a robust tool in the studies on fluid mechanics
In this research, the weakly-compressible moving particle semi-implicit (WC-MPS)
method, which is modified and improved by Shakibaeinia and Jin (2010), is applied to
simulate the impulse waves generated by landslide. During this study, the complete
theory of the WC-MPS model was applied/adopted. The model was modified to simulate
the impulse wave for the different landslide cases. This study includes the simulations for
the submerged and un-submerged landslide cases, the introduction of different sliding bed slopes, and also a firsthand comparison between WC-MPS simulation and
experiment. After comparing WC-MPS simulation with experimental results for different
cases, the applicability of WC-MPS method in simulating the impulse wave generated
in/from landslide is confirmed at the end of this study.
WC-MPS is a relatively new process of simulating hydrodynamic problems.
However, the developed mesh-free particle method is capable of simulating complex
incompressible fluid flow problems characterized by large deformations and
fragmentations of boundaries and interfaces. In this thesis, WC-MPS method is used to
simulate impulse waves generated by landslides. First, the simulation results are generally
compared with previously published papers by other researchers, and then detailed
simulation results about the shape of wave, and water velocity around the sliding wedge
are compared with an experiment. Based on this study, the WC-MPS method is found to
be able to provide a stable and accurate result for the simulation of the impulse wave.Studentye
Seasonal k and Independent Carbon Dioxide Approaches For First Order Decay Landfill Gas Modelling
No full textA Thesis Submitted to the Faculty of Graduate Studies and Research In Partial Fulfillment of the Requirements for the Degree of Master of Applied Science in Environmental Systems Engineering, University of Regina. ix, 89 p.Canada's per capita solid waste disposal rates are among the highest in the world.
Landfill gas generation requires more accurate modelling in order to properly compare
future emission mitigation or energy production projects. The EPA software LandGEM
was selected for its common use in the literature. Two alternative methods to increase
accuracy in methane and carbon dioxide estimates were studied.
Real-time methane collection data from a municipal landfill in Regina's cold, semi-arid
climate were consolidated to fit a linear-interpolated form of LandGEM. LandGEM
defaults were found invalid for this landfill due to significant overestimation (76.5%
error). Seasonal variations in gas collection were explored, and found that optimal
seasonal k and Lo collection parameters had 7.3% error compared to field data, compared
to 15.5% error using optimal annual parameters. The optimal kwinter was 0.0082 year-1
and the ksummer was 0.0095 year-1 (14.7% difference). Three pseudo-second order
iterative methods were used to fit the model estimates to the daily data, and they were
evaluated using RSS and literature values. Optimized parameters were applied to a
simple study using LFGcost-Web. The default parameters overestimated the net present
worth by 57-107% for three of the four projects.
LandGEM assumes that carbon dioxide estimates are a function of methane, and that the
two gases make up nearly 100% of gas content. This can lead to oversights in collection
system design. A total of 25 cases (five formulas, five approaches) were compared for
carbon dioxide collection at four western Canadian landfills. The existing Default with
Traces approach overestimated production in 3 of the 4 sites, resulting in the highest RSS. LandGEM's governing formula yielded the most accurate results under this
approach (mean RSS increased by 7.0 to 49.9% using other equations). Optimization
resulted in the most accurate results for all formulas and approaches, and had the greatest
reduction in RSS over the default approach (73.0 to 98.0%). The 1.4 ratio approach
yielded the second most accurate results (mean RSS reduction of 66.5%). The annual k
formula calculated k’s via two empirical formulas (based on precipitation), and yielded
the lowest accuracy in 12 of 20 approaches.Studentye
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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