197,448 research outputs found
Are fast interceptive actions continuously guided by vision? Revisiting Bootsma and van Wieringen (1990)
No full textIn an influential study, R. J. Bootsma and P. C. W. van Wieringen (1990) argued that 2 of their 5 participants used visual information continuously during the attacking forehand drive in table tennis, its brief duration vis-à-vis the visuomotor delay notwithstanding. The authors repeated Bootsma and van Wieringen's experiment and included a condition in which vision was obscured after drive initiation. The authors replicated most of Bootsma and van Wieringen's findings but found no significant differences between the full-vision and no-vision conditions, which goes against the interpretation of these findings as evidence for continuous visual guidance. A subsequent simulation study found that a single preprogrammed muscle stimulation pattern resulted in spatiotemporal convergence similar to that observed experimentally but not in other important behavioral characteristics. The results contain no indications that visual information that becomes available after drive initiation affects arm motion and suggest that a form of model-based predictive control is operative rather than continuous visual guidance. © 2010 American Psychological Association
Similar findings, different interpretations: a response to the commentary by Bootsma et al. (2010)
No full textIn this paper, we respond to the commentary by R. J. Bootsma, L. Fernandez, A. H. P. Morice, and G. Montagne (2010) concerning our original study on the role of vision during the execution of fast interceptive actions (A. J. van Soest, L. J. R. Casius, W. de Kok, M. Krijger, M. Meeder, and P. J. Beek, 2010), that was inspired by the seminal study of R. J. Bootsma and P. C. W. van Wieringen (1990). Most importantly, we reiterate that the control strategy used in the simulation study (preprogrammed muscle stimulation, triggered at an appropriate time) was adopted on the sole ground that it was the simplest control strategy that allowed us to investigate the role of the visco-elastic properties of muscles. Regarding the visuomotor delay of our participants, we note that the assumption that the visuomotor delay can be reliably identified as the time from the occurrence of a minimum in the coefficient of variation of the relative rate of dilation to the instant of ball contact, is not generally accepted; lacking firm data on the visuomotor delay of our participants, any arguments on the relation between movement time and visuomotor delay are not well grounded. All in all, we believe that our original study added several new-but by no means final-insights to the understanding of the control of fast interceptive actions. © 2010 American Psychological Association
Author Correction: Global phylogenetic analysis of Escherichia coli and plasmids carrying the mcr-1 gene indicates bacterial diversity but plasmid restriction
No full textIn the original version of this Article, Martin C. J. Bootsma, Perry J. van Genderen, Abraham Goorhuis, Martin Grobusch, Nicky Molhoek, Astrid M. L. Oude Lashof, Ellen E. Stobberingh & Henri A. Verbrugh were incorrectly listed as the COMBAT consortium. This error has now been corrected in the HTML and PDF versions of the Article, and in the accompanying supplementary material.</p
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Author Correction: Global phylogenetic analysis of Escherichia coli and plasmids carrying the mcr-1 gene indicates bacterial diversity but plasmid restriction (vol 7, 15364, 2017): Global phylogenetic analysis of Escherichia coli and plasmids carrying the mcr-1 gene indicates bacterial diversity but plasmid restriction (Scientific Reports, (2017), 7, 1, (15364), 10.1038/s41598-017-15539-7)
No full textIn the original version of this Article, Martin C. J. Bootsma, Perry J. van Genderen, Abraham Goorhuis, Martin Grobusch, Nicky Molhoek, Astrid M. L. Oude Lashof, Ellen E. Stobberingh & Henri A. Verbrugh were incorrectly listed as the COMBAT consortium. This error has now been corrected in the HTML and PDF versions of the Article, and in the accompanying supplementary material
Author Correction: Global phylogenetic analysis of Escherichia coli and plasmids carrying the mcr-1 gene indicates bacterial diversity but plasmid restriction (Scientific Reports, (2017), 7, 1, (15364), 10.1038/s41598-017-15539-7)
No full textIn the original version of this Article, Martin C. J. Bootsma, Perry J. van Genderen, Abraham Goorhuis, Martin Grobusch, Nicky Molhoek, Astrid M. L. Oude Lashof, Ellen E. Stobberingh & Henri A. Verbrugh were incorrectly listed as the COMBAT consortium. This error has now been corrected in the HTML and PDF versions of the Article, and in the accompanying supplementary material
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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