1,720,961 research outputs found
UWB Active-Passive Two-Way Ranging Protocol Data Captured in an Industrial Environment
No full text<p>Dataset containing Ultra-Wideband (UWB) Active-Passive Two-Way-Ranging (AP-TWR) protocol range estimates, using the Qorvo DW1000 chip-based Eliko UWB RTLS system. Data was captured in an industrial environment, at the premises of a thermoplastic pipe manufacturer Krah Pipes OÜ, located near Tallinn, Estonia in December 2022.</p><p>Tests consisted of 1) 30 arbitrarily chosen stationary points on the factory floor 2) A movement track marked on the lines of the factory floor. The true coordinates of the stationary points and the critical points of the movements are measured with the Leica DISTO S910 laser distance meter. The data was used to validate the proposed AP-TWR-based Adaptive Extended Kalman Filter (A-EKF) position estimation method.</p><p><strong>Instructions:</strong> </p><p>The text file <i>anchor_coordinates.txt</i> contains the anchor coordinates (in meters) used in the tests in the form: <ANCHOR HEX ID>, <X-COORDINATE>, <Y-COORDINATE>, <Z-COORDINATE></p><p>The text file <i>stationary_truecoordinates.txt</i> contains the true coordinates (in meters) for each stationary test point in the form of: <FILENAME>, <X-COORDINATE>, <Y-COORDINATE>, <Z-COORDINATE></p><p>The text file <i>movement_truecoordinates.txt</i> contains the true coordinates (in meters) for the critical points of the movement tests in the form of: <CRITICAL POINT NUMBER>, <X-COORDINATE>, <Y-COORDINATE>, <Z-COORDINATE></p><p>Text files <i>movement.txt</i> and<i> stationaryX.txt</i> (X is the number on the stationary point) contain the AP-TWR ranging data (in centimeters) from which the AP-TWR measurement matrices are composed. The files contain 2 kinds of messages RR_L and LR_E, where the former contains the active SS-TWR range estimates and the internal clock counter of the tag (in milliseconds) and the latter consists of the passive range estimates (and the active SS-TWR range estimates of that specific anchor should be repeated after the <SELF> field). The <SEQUENCE NUMBER> (running from 0 to 255 is a cyclical number for the ranging sequence) and <TAG HEX ID> fields tie together the corresponding RR_L and LR_E messages. The movement tests also contain COORD_E messages, but these are not relevant from the standpoint of the tests - they are coordinates calculated by the Eliko UWB RTLS, and should be ignored.</p><p>Considering that the number of active anchors is m, the structure of RR_L messages is the following (irrelevant information, such as tag/anchor informational flags, etc. are not explained and left as <BLANK>):</p><p><PEKIO>, <MESSAGE TYPE: RR_L>, <SEQUENCE NUMBER>, <TAG HEX ID>, m times (<ANCHOR HEX ID>, <DISTANCE VALUE>), <TAG TIME COUNTER IN ms>, m times (<BLANK>), <BLANK></p><p>The same considerations are are taken for the LR_E messages, where the structure is (Note that <PASSIVE ESTIMATE CALCULATION> fields containing the asterisk *, denote that during this slot in the raniging sequence, the anchor was actively ranging):</p><p><PEKIO>, <MESSAGE TYPE: LR_E>, <SEQUENCE NUMBER>, <BLANK>, <PASSIVE ANCHOR HEX ID>, m times (<LISTENED ACTIVE ANCHOR HEX ID>, <PASSIVE RANGE ESTIMATE>, <PASSIVE ESTIMATE CALCULATION>), <SELF FIELD DESIGNATOR>, <ACTIVE SS-TWR RANGE ESTIMATE>, <NRI FIELD DESIGNATOR>, <NUMBER OF INTERCEPTED ACTIVE RANGINGS>, 8 times (<BLANK>)</p><p> </p><p>Based on the RR_L and LR_E messages, the AP-TWR measurement matrices for each ranging sequence is formed, the sampling times for the Extended Kalman Filter are extracted from the data of RR_L messages.</p><p><strong>Funding Agency: </strong></p><p>European Union's Horizon 2020 Research and Innovation programme</p><p><strong>Grant Number: </strong></p><p>951867, 668995, 101058505</p><p>This research has also been supported by the European Regional Development Fund and Estonian Research<br>Council under Grant PUT-PRG424.</p>
5ppimisalgoritmid hajutatud v\uf5rkude tarbeks – juhts\uf5lme hajus valimine. Algorithms for Learning and Adaptation Over Networks – Distributed Leader Selection
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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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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