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Recognizing diverse forms of impact
No full textThis presentation will share thoughts on recognizing diverse forms of impact by faculty
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
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Assessment of the Active Absorption System of the Large Wave Flume
Full text linkThe Large Wave Flume at the O.H. Hinsdale Wave Research Laboratory houses a piston wavemaker with a built-in active absorption system designed by MTS Systems Corporation. The performance of the active absorption system has not been properly assessed yet. This thesis evaluates the performance of the MTS active absorption system in parallel with a new system designed at Aalborg University called AwaSys7.
The results of this thesis have a direct impact on the quality of data collected in future experiments.
The collection of high-quality data in a wave laboratory is vital for coastal engineering design testing and expanding our understanding of physical ocean processes. Confidence in data is obtained by working with a reliable wave generator, particularly if an active absorption system is present and whose capabilities are known. It is understood that experiments requiring regular and irregular waves are impacted by re-reflection from the wave board if an active absorption system is not present or poorly designed. The presence of re-reflected waves leads to a build-up of energy, altering the desired sea state the experimental model is tested in.
The experiment at the Large Wave Flume tested a series of regular and irregular wave conditions in a highly reflective environment. The flume was equipped with five resistance wave gauges and eight ultrasonic wave gauges.
The performance of the two systems for the regular wave cases was based on calculated reflection coefficients, uniformity of incident waves, and the length of time required to eliminate the existing waves in the flume after testing was completed. For irregular wave cases the change in variance during simultaneous generation and absorption and its exponential decrease at the culmination of generation were used.
The performance parameters were calculated using a mixture of methods including zero down crossing analysis and the separation of incident and reflected waves conducted with the program WaveLab3.
The results show that the AwaSys active absorption system outperforms MTS for the irregular wave cases. However, neither system was able to remain stable for the entire duration of all of the irregular wave conditions. Both AwaSys and MTS had similar performance for the regular wave cases, but there was a trend in favor of AwaSys for all but one tested frequency
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Modeling Eddy Correlation Biases Created by Velocity Sensitivities of Clark-type Oxygen Microelectrodes Under Waves
Full text linkField deployments, flume experiments, and a 2D wave model have been used to identify the characteristics of Clark-type oxygen microelectrodes and measurement parameters that could possibly bias eddy correlation (EC) flux measurements made under waves. Eddy correlation is a technique adapted from atmospheric sciences that couples concurrent and co-located velocity and oxygen measurements in order to calculate how much oxygen is being taken up by the sediment in aquatic environments. Field deployments made with two co-located microelectrodes suggest that individual sensor sensitivities to changes in the velocity field under wave conditions are biasing the EC calculation. Experiments performed in two different flumes illustrate the non-linear response of microelectrodes to changes in velocity and the individual nature of each microelectrode’s performance based on the shape and placement of the sensing cathode. Long, thin cathodes that are offset slightly from the membrane seem to have the necessary response time for EC measurements and also minimize the velocity effect.
Furthermore, a 2D wave model was used to test the sensitivity of the EC flux determination to various parameters specific to the wave conditions and to the microelectrode response. The model demonstrates that most parameters do not directly affect the flux, as long as both the velocity and oxygen time series are in phase temporally with the exception of a non-zero mean vertical velocity. The mean horizontal velocity can also greatly affect the flux if there is a delay in the microelectrode response or a spatial separation between the sampling volumes for the ADV and microelectrodes that results in a time lag between the velocity and oxygen time series. The results from the model suggest that correctly aligning the oxygen and velocity time series is extremely important and that non-zero mean vertical velocities may be biasing the flux calculation in some instances
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
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