1,723,667 research outputs found
Comparison of kinematic acquisition methods for musculoskeletal analysis of underwater flykick
Get PDFThe use of musculoskeletal modeling as a tool for analysing performance sport is increasing. This typically involves simulating an athlete's motion as well as the external loads they experience and assessing muscle activities with respect to the given kinematics. The findings of any analysis are therefore dependent on the accuracy of the kinematics. Furthermore, for sports where the environment directly influences the kinematics, for example swimming, it is preferable to capture the athlete's motion in this environment. For the example of swimming, using typical optical based systems is challenging due to marker occlusions and the reflection of the water, while the frequently used manual digitisation of video data is laborious and time intensive. Inertial measurement units (IMU), however, have been shown to be suitable alternative for capturing gait kinematics.This paper compares results from a musculoskeletal model of human underwater flykick where the kinematics have been determined from two sources; manual digitisation and IMUs. The model simulates the anatomy of the trunk and lower limbs while motion is prescribed for; pelvic-pitch and pelvis-thorax, hip, and knee flexion-extension. It is found that the knee, hip and pelvic-pitch angles derived from the IMU exhibit close agreement to the manual digitisation process and captures the swimmer's motion well as compared to the respective video frames. The musculoskeletal model was executed for both input types and the observed maximum muscle activities were similar in both trend and mean. It is therefore suggested the multiple IMUs can be reliably employed in determining joint kinematics of underwater flykic
Block Card 5918 Foth Drive
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Ranch houses | 5918 Foth Avenue (Toledo, Ohio) | Dwelling | Garnet Place Addition (Toledo, Ohio) | Trilby Area (Toledo, Ohio)
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
Long-term AGILE monitoring of the puzzling gamma-ray source 3EG J1835+5918
No full textContext. We present the AGILE gamma-ray observations of the field containing the puzzling gamma-ray source 3EG J1835+5918. This source is one of the most remarkable unidentified EGRET sources.
Aims. An unprecedentedly long AGILE monitoring of this source yields important information on the positional error box, flux evolution, and spectrum.
Methods. 3EG J1835 + 5918 has been in the AGILE field of view several times in 2007 and 2008 for a total observing time of 138 days from 2007 Sep. 04 to 2008 June 30 encompassing several weeks of continuous coverage.
Results. With an exposure time approximately twice that of EGRET, AGILE confirms the existence of a prominent gamma-ray source (AGL J1836 + 5926) at a position consistent with that of EGRET, although with a remarkably lower average flux value for photon energies greater than 100 MeV. A 5-day bin temporal analysis of the whole data set of AGL J1836 + 5926 shows some evidence for variability of the gamma-ray flux. The source spectrum between 100 MeV and 1 GeV can be fitted with a power law with photon index in the range 1.6-1.7, fully consistent with the EGRET value.
Conclusions. The faint X-ray source RX J1836.2 + 5925 that has been proposed as a possible counterpart of 3EG J1835 + 5918 is well within the AGILE error box. Future continuous monitoring (both by AGILE and GLAST) is needed to confirm the gamma-ray flux variability and to unveil the source origin, a subject that is currently being pursued through a multiwavelength search for counterparts
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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