1,720,956 research outputs found
Dataset for Vertical Jump Height Estimation from Depth Camera and Wearable Accelerometer Motion Data
No full text<h2>Dataset for Vertical Jump Height Estimation from Depth Camera and Wearable Accelerometer Motion Data</h2>
<p>While the training of vertical jumps offers benefits for agility and performance across various amateur sports, the objective measurement of jump height remains a challenge compared to simpler assessments like the broad jump distance in a sand pit. Aiming at the <strong>estimation of the vertical jump height</strong> with easy-to-use and cost-efficient devices, we recorded a comprehensive dataset with an <strong>off-the-shelf depth camera</strong> and <strong>cost-efficient wearable motion sensors</strong>, equipped with an onboard three-axis accelerometer sensor. In our <strong><a title="JumpMetric: Assessment of Fiducial Positions for Vertical Jump Height Estimation from Depth Cameras and Wearable Sensors" href="https://doi.org/10.1145/3701571.3701607" target="_blank" rel="noopener">publication</a></strong>, we assessed the accuracy achievable at diverse fiducial positions, which are <strong>7 skeletal joints</strong> from the depth camera and <strong>10 wearing positions</strong> of the sensing devices. The <strong>user study</strong> was conducted with <strong>44 subjects</strong> (33 male, 11 female, 23.1 ± 2.2 years) performing <strong>five countermovement jumps</strong> each. In order to gather <strong>ground truth</strong> information, a conventional digital camera was used to document the jumps and the vertical hip displacement along a measuring tape. Thales’ theorem on proportionality was then applied to <strong>rectify the perspective displacement</strong> of the manual readings from the video footage.</p>
<h3>Context and Methodology</h3>
<ul>
<li>Dataset for research on the estimation of <strong>vertical jump height</strong> and in adjacent fields such as <strong>human activity recognition</strong> etc.</li>
<li>The dataset provides recordings from two easy-to-use and cost-efficient sensing modalities, the off-the-shelf <strong>depth camera</strong> Microsoft Azure Kinect and <strong>10 wearable 3-axis accelerometers</strong></li>
<li>The <strong>ground truth</strong> information are manually determined and rectified</li>
<li>The dataset was used in a <strong><a title="JumpMetric: Assessment of Fiducial Positions for Vertical Jump Height Estimation from Depth Cameras and Wearable Sensors" href="https://doi.org/10.1145/3701571.3701607" target="_blank" rel="noopener">publication</a></strong> showing that the most accurate estimates of the depth camera were obtained from the pelvis and thoracic spine joint (error of -15.8 ± 23.3mm and 24.2 ± 35.1 mm) while the best estimates from the wearable motion sensor data were obtained from the neck position and the ankles (error of 18.8 ± 29.0mm and -4.8 ± 35.2 mm)</li>
<li>We <strong>encourage researchers</strong> to improve on our findings, e.g., by applying advanced <strong>machine learning</strong> techniques on the provided dataset</li>
</ul>
<h3>Technical Details</h3>
<ul>
<li>A total of <strong>220 recordings</strong> of <strong>countermovement jumps</strong>: 44 subjects, 5 jumps, two sensing modalities, manually determined and rectified ground truth</li>
<li><strong>44 subjects</strong>: 33 male and 11 female with an average age of 23.1 ± 2.2 years</li>
<li>Subjects gave <strong>written consent</strong> to provide the measurements for research purposes and publication (video recordings were deleted after ground truth determination)</li>
<li><strong>Depth camera</strong>: Microsoft Azure Kinect, 3d-coordinates (x, y, and z) for all <strong>32 joint positions</strong> recorded along with the accompanied timestamp, frame rate of <strong>30 Hz</strong></li>
<li><strong>Wearable motion sensors</strong>: 10 wearing positions (lower neck, chest (sternum), hips (left and right), thighs (left and right), ankles (left and right), and wrists (left and right)), 3-axis accelerometer sensor data (x, y, and z) along with a timestamp for each sample, sampling rate of <strong>100 Hz</strong></li>
<li>Two folders 'depthcamera' and 'wearables', each containing 44 subfolders labeled with the subject ids '01' to '44'</li>
<li>Every subject's folder again contains 5 subfolders labeled with the jump ids 'j1' to 'j5' that contain the files of the countermovement jump recordings</li>
<li>The recordings are provided in both Python pickle files *.p as well as comma-separated value *.csv (';' as separator) files with the file names composed of subject id and jump id for *.p files, e.g., 's05_j3.p', as well as the joint or wearing position for the *.csv files, e.g., 's05_j3_hip_left.csv'</li>
<li>The pickle files have been tested successfully with Python 3.13.1 and NumPy 2.2.2</li>
<li>Unfortunately, for <strong>subject 02</strong>, the accelerometer data of neck and chest were not successfully recorded and, hence, the associated lists in the *.p and the *.csv files empty</li>
<li><strong>Demographic information</strong>: a summary of the individual subjects' demographic information is available in the files 'subjects.p' or 'subjects.csv', providing the gender as female or male, age in years, height in cm, weight in kg, if they were conveyed by the lecture, if they were a student and, if so, of which degree</li>
<li><strong>Ground truth</strong>: the manually determined and rectified ground truth information are provided in the files 'groundtruth.p' or 'groundtruth.csv', associated with the individual subject ids, providing jump number, jump height, and whether the jump is considered an overall well-executed jump</li>
<li>The <strong>dataset description</strong> at hand is also provided in the 'README.txt' file of the dataset's *.zip file</li>
</ul>
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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