1,721,034 research outputs found
De la place de certains documents d'urbanisme dans l'invention des paysages
No full textAubry Pascal. De la place de certains documents d'urbanisme dans l'invention des paysages. In: Publics et Musées, n°10, 1996. pp. 51-62
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
Target localisation and tracking in a UWB radar network: UWB Indoor Person Tracking
No full textFor both security and analytics, much research has gone into person tracking already. As a result, manydifferent state of the art technologies exist. However, in darkness or without a direct line of sight, muchless technologies are capable of this. The choices become especially limited when the setup needs tobe portable.A method for person localisation and tracking is implemented. This method consists of a localisationpart, which works with any range-based detection method. Least square estimation is used to determinethe location from the radar detections. With two or more people, it is mathematically impossible todistinguish which locations are correct, if only the current measurement is taken into account.Thus, the first problem to be solved is connecting ranges to targets. This is done using target association.After this is done, one-dimensional tracking can track people at lower computational cost.The tracking is both in one dimension (per-radar) and in two dimensions. The Hungarian algorithmis used for keeping track of people using a Kalman filter. The Kalman filter considers the predictednext location and the measured next location, and makes a best guess. A neural network was used forthe optimisation of location-specific noise parameters, something that has not been done before in thiscontext. Single person tracking and two person tracking works as expected. The tracking is relativelycheap in terms of computational complexity. While the tracking has no limits on the maximum numberof people present, the localisation gets increasingly difficult with a complexity of O (n^n). Detectingthe correct peaks is a non-trivial problem because of multi-path reflections. In combination with UWBradar detections, single and dual person tracking in a room is achieved. More people can be handled bythe tracking algorithm, which is detection-method-agnostic, but not by the localisation. There is someroom for improvement in the dual and triple-person case. However, going further than this is currentlyunfeasible, because of the many reflections that occur. Furthermore, the large amount of possible personlocations also has an effect. This is a problem that scales with O (n^n) where n is the amount oftargets
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
Person Detection Using Ultra-Wideband Radars: UWB Indoor Person Tracking
No full textIn this report, an indoor target detection system is developed for detecting one or multiple targets in a cluttered area based on a network of distributed ultra-wideband radars. The system is capable of acquisition of data in the form of distances between radar and targets, which can be used to localise and track one or multiple targets in real-time. The system can be used in a wide range of applications, ranging from security, such as anti-intruder systems, to commercial applications, such as tracking animals in a zoo.\newlineA network of four Time Domain PulsON 410 ultra-wideband radars are used in the sensing system, due to their availability, high spatial accuracy and performance in non-line-of-sight conditions. By using different transmission codes, interference between the sensors is kept to a minimum. Multiple antennas are considered, and the Vivaldi antenna is shown to be preferred over the dipole antenna for this application due to its slightly higher directivity, reducing the impact of multi-path effects. The data acquisition for the four radars is initiated almost simultaneously, up to the point that the radars can be considered synchronised. The received signal is filtered using background rejection and an FIR motion filter, to reveal motion of the target. Four detection algorithms are considered, of which the least-of constant false alarm rate (LO-CFAR) has a better performance for indoor multiple person tracking applications over conventional CFAR detection. The LO-CFAR algorithm can be applied to the filtered signal to detect targets in range of the sensors, and determine their distance from the sensor. Range-Doppler processing is proposed as a method to acquire a velocity estimate of the target, which can be used in a tracking system to estimate the position of the target more accurately. However, due to the relatively low slow-time sampling frequency, it is not feasible to utilise Range-Doppler processing in the current system. Only simulations of Range-Doppler processing are shown in the thesis. \newlineThe system is tested in different environments; single person and multiple person situations are considered in an open and a cluttered area. It is shown that the developed system is capable of detecting a single target in both open and cluttered areas. With two targets in cluttered areas, it becomes difficult to distinguish a target from multi-path reflections, reducing the reliability of the system in these situations. In an open area, multiple targets can successfully be distinguished and detected. The sensing system can successfully detect and determine the distance to a person in non-line-of-sight conditions. Additionally, the detection system is tested on a smaller target to determine performance and accuracy of the system in situations with smaller targets. While the small target is possible to detect, the range at which reliable results are obtained is significantly reduced by the size of the target.\newlineIt is concluded that there is room for improvement of the target detection system, especially in situations involving multiple targets in cluttered areas. Through-wall detection is shown to be feasible with the current sensing system. For small targets, a higher pulse integration index is required to achieve a reliable range similar to the results of person detection. Range-Doppler processing requires a higher slow-time sampling frequency in order to be feasible in a real-time tracking system. Further recommendations include testing alternative antennas to improve through-wall detection, designing a multi-static radar system and implementing more complex detection algorithms that have a better multi-person performance.Electrical Engineering, Mathematics and Computer Scienc
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
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