1,721,034 research outputs found
No. 654 Christopher R. Johnson
No full textTranscript (46, 55 pages) of two interviews by Anne P. Peterson with Christopher R. Johnson, director of the Scientific Computing Institute, on 21 September and 18 October 2011. Part of the University Oral History Project, Everett Cooley Collection tape numbers U-3086 and U-3092Christopher Johnson (b. 1960) was born in Kansas City, Kansas. His father was in the Air Force so he and his family moved around a lot when he was young. He went to high school and did his undergraduate in Dayton, Ohio. Christopher then earned his master´s in physics and a PhD in biophysics and computing from the University of Utah. Before working at the University of Utah, he was a professor of physics at Westminster for four years. He describes several positions he held at the University of Utah. Christopher talks about his time working at Sperry Corporation. He describes his involvement with the ACCESS program at the University of Utah.In his second interview, Christopher talks about his time as a research assistant professor, assistant professor, and then associate chairman of the department of computer sciences at the University of Utah. He describes research projects he was involved in. Christopher explains interactive scientific visualization. He talks about his time as director of the Center for Scientific Computing and Imaging. He also worked for the Department of Energy. He talks about his involvement with the University of Utah´s school of computing. Christopher talks about the start-up he founded, Visual Influence.Project: University Oral History Project. Interviewer: Anne Peterso
Christopher R. Johnson speaks about research in computer simulation and visualization in medicine on September 13, 2000
No full textSarah Michalak welcomes the audience and the Gould family to the lecture. President Machen introduces the speaker, Christopher R. Johnson, who is an associate professor at the University of Utah School of Computing, directs the Scientific Computing and Imaging Institute and the National Institute of Health Center for Bioelectric Field Modeling Simulation and Visualization, and co-directs the computational science and engineering program. Johnson speaks about research in computer simulation and visualization in medicine. He discusses the application of recently developed computing tools in cardiology and neuroscience. These applications allow heart and brain surgeons to use non-invasive diagnostic tools as substitutes for preoperative surgery techniques. Finally, he talks about medical imaging and his vision for the future. Speakers: Christopher R. Johnson; introduction by Sarah Michalak (Director of the Library), J. Bernard Machen (President of the University of Utah
Ninth Annual Gould Lecture: "Computer simulation and visualization in medicine" [by] Christopher R. Johnson, Director of the Scientific Computing and Imaging Institute
No full textPoster publicizing the Ninth Annual William R. and Erlyn J. Gould Distinguished Lecture on Technology and the Quality of Life, held September 13, 2000, in the Gould Auditorium of the J. Willard Marriott Library. Christopher R. Johnson, Director of the Scientific Computing and Imaging Institute, presented on "Computer simulation and visualization in medicine.
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
sj-tif-1-inv-10.1177_15569845231210282 – Supplemental material for Outcomes Comparison of Robot-Assisted and Video-Assisted Thoracoscopic Cardiac Sympathetic Denervation
No full textSupplemental material, sj-tif-1-inv-10.1177_15569845231210282 for Outcomes Comparison of Robot-Assisted and Video-Assisted Thoracoscopic Cardiac Sympathetic Denervation by Kelsey Melinosky, Albert Leng, Christopher R. Johnson, Katherine Giuliano Verdi, Eric W. Etchill, Harikrishna Tandri, Malcolm V. Brock and Jinny S. Ha in Innovations</p
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
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