1,721,030 research outputs found
A low complexity pre-post processing multiple description coding for video streaming
No full textVideo streaming is highly demanding in terms of processing power. When video streaming is delivered over networks subject to packet erasures, multiple description coding can be a good choice to guarantee a basic level of quality also in the presence of high congestion levels. However, most of the proposed schemes are conceived as stand-alone co-decoding algorithms, not compatible with wide spread video standards. Methods based on pre- and post- processing to standards have also been proposed, but they generally require further computational power, which could make them useless for real time applications. In this paper we propose a novel pre- and post-processing scheme that yields sensible improvement with respect to state of the art methods, in term of both performance and complexity; this makes it practical for video streaming applications. 1
Benchmarking Equivariance for Deep Learning Based Optical Flow Estimators - Additional Material
No full textScripts to replicate the paper results, including Matlab scripts to generate optical flow groundtruth planar motion by image formation.
Matlab code for saving .flo files is taken from https://vision.middlebury.edu/flow
Concurrent Software Engineering Project
No full textConcurrent engineering or overlapping activities is a business strategy for schedule compression on large development projects. Design parameters and tasks from every aspect of a product’s development process and their interdependencies are overlapped and worked on in parallel. Concurrent engineering suffers from negative effects such as excessive rework and increased social and communication complexity that negatively affect gains. In the university environment, however, these difficulties and negative effects, if controlled, can help in promoting our educational goals such that they should be exploited rather than avoided. Although linear (i.e., waterfall) has been the most often used model in teaching, time constraints and an opportunity-driven learning process should make the concurrent model suitable for student projects. This paper elaborates on these ideas and reports on our students’ experience.</jats:p
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
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