1,721,051 research outputs found
High-Resolution Terrian Map from Multiple Sensor Data
No full textThis paper presents 3-D vision techniques for incrementally building an accurate 3-D representation of rugged terrain using multiple sensors. We have developed the locus method to model the rugged terrain. The locus method exploits sensor geometry to efficiently build a terrain representation from multiple sensor data. Incrementally modeling the terrain from a sequence of range images requires an accurate estimate of motion between successive images. In rugged terrain, estimating motion accurately is difficult because of occlusions and irregularities. We show how to extend the locus method to pixel-based terrain matching, called the iconic matching method to solve these problems. To achieve the required accuracy in the motion estimate, our terrain matching method combines feature matching, iconic matching, and inertial navigation data. Over a long distance of robot motion, it is difficult to avoid error accumulation in a composite terrain map that is the result of only local observations. However, a prior digital elevation map (DEM) can reduce this error accumulation if we estimate the vehicle position in the DEM. We apply the locus method to estimate the vehicle position in the DEM by matching a sequence of range images with the DEM. Experimental results from large-scale real and synthetic terrains demonstrate the feasibility and power of our 3-D mapping techniques for rugged terrain. In real world experiments, we built a composite terrain map by merging 125 real range images over a distance of 100 m. Using synthetic range images, we produced a composite map of 150 m from 159 images. In this work, we demonstrate a 3-D vision system for modeling rugged terrain. With this system, mobile robots operating in rugged environments can build accurate terrain models from multiple sensor data.The authors would like to thank W. Whittaker, M. Hebert, and E. Krotkov for their helpful discussions throughout this work. We would also like to thank K. Olin of Hughes Research Laboratories for providing range images and the DEM. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of NASA or the United States Government
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
Practical Biometric Authentication with Template Protection
Get PDFWe show the feasibility of template protecting biometric authentication systems. In particular, we apply template protection schemes to fingerprint data. Therefore we first make a fixed length representation of the fingerprint data by applying Gabor filtering. Next we introduce the reliable components scheme. In order to make a binary representation of the fingerprint images we extract and then quantize during the enrollment phase the reliable components with the highest signal to noise ratio. Finally, error correction coding is applied to the binary representation. It is shown that the scheme achieves an EER of approximately 4.2% with secret length of 40 bits in experiments
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
ケイサンキ ケツゴウ ニヨル ガゾウ ショリ システム ト カオノ ニンシキ
Get PDF京都大学0048新制・課程博士工学博士甲第1486号工博第366号新制||工||277(附属図書館)UT51-49-E145京都大学大学院工学研究科電気工学専攻(主査)教授 坂井 利之, 教授 大野 豊, 教授 堂下 修司学位規則第5条第1項該当Kyoto UniversityDFA
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