1,721,200 research outputs found
Benchmarking real-time vehicle data streaming models for a smart city
No full textThis research is partially supported by the Spanish Ministry of Economy and Competitiveness and European Regional Development Fund (ERDF) through the "HERMES - SmartDriver" project (TIN2013-46801-C4-2-R), the "HERMES - Smart Citizen" project (TIN2013-46801-C4-1-R), and the "HERMES -Space&Time" project (TIN2013-46801-C4-3-R)
Benchmarking real-time vehicle data streaming models for a smart city
Get PDFThe information systems of smart cities offer project developers, institutions, industry and experts the possibility to handle massive incoming data from diverse information sources in order to produce new information services for citizens. Much of this information has to be processed as it arrives because a real-time response is often needed. Stream processing architectures solve this kind of problems, but sometimes it is not easy to benchmark the load capacity or the efficiency of a proposed architecture. This work presents a real case project in which an infrastructure was needed for gathering information from drivers in a big city, analyzing that information and sending real-time recommendations to improve driving efficiency and safety on roads. The challenge was to support the real-time recommendation service in a city with thousands of simultaneous drivers at the lowest possible cost. In addition, in order to estimate the ability of an infrastructure to handle load, a simulator that emulates the data produced by a given amount of simultaneous drivers was also developed. Experiments with the simulator show how recent stream processing platforms like Apache Kafka could replace custom-made streaming servers in a smart city to achieve a higher scalability and faster responses, together with cost reduction.This research is partially supported by the Spanish Ministry of Economy and Competitiveness and European Regional Development Fund (ERDF) through the “HERMES – SmartDriver” project (TIN2013-46801-C4-2-R), the “HERMES – Smart Citizen” project (TIN2013-46801-C4-1-R), and the “HERMES –Space&Time” project (TIN2013-46801-C4-3-R)
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No full textPhotograph of Jewel Darr, who played football for Texas Technological College, in his football outfit with the stadium in the background. This image appears on page 206 of the 1931 La Ventana yearbook.This copy print was made from an original silver nitrate negative
Exploiting synergies of mobile mapping sensors and deep learning for traffic sign recognition systems
Get PDFThis paper presents an efficient two-stage traffic sign recognition system. First, 3D point cloud data is
acquired by a LINX Mobile Mapper system and processed to automatically detect traffic signs based on
their retro-reflective material. Then, classification is carried out over the point cloud projection on RGB
images applying a Deep Neural Network which comprises convolutional and spatial transformer layers.
This network is evaluated in three European traffic sign datasets. On the GTSRB, it outperforms previous
state-of-the-art published works and achieves top-1 rank with an accuracy of 99.71%. Furthermore, a
Spanish traffic sign recognition dataset is released.Ministerio de Economía y Competitividad TIN2013-46801-C4-1-RMinisterio de Economia y Competitividad TIN2013-46801-C4-4-
A scalable data streaming infrastructure for smart cities
Get PDFProceedings of JARCA 2016: XVIII JARCA Workshop on Qualitative Systems and Applications in Diagnosis, Robotics and Ambient Intelligence: El Toyo, Almería (Spain), 23-29 June, 2016Many of the services a smart city can provide to its citizens rely on the ability of its infrastructure to collect and process in real time vast amounts of continuous data that sensors deployed through the city produce. In this paper we present the server in- frastructure we have designed in the context of the HERMES project to collect the data from sensors and aggregate it in streams for their use in services of the smart city.Research reported in this paper was supported by the Spanish Economy Ministry through the “HERMES–Smart Driver” project (TIN2013-46801-C4-2-R) and the “HERMES–Smart Citizen” project (TIN2013-46801-C4-1-R
Toward Safer Highways: Predicting Driver Stress in Varying Conditions on Habitual Routes
Get PDFThis work was supported by the “HERMES-SMART DRIVER” project TIN2013-46801-C4-2-R, funded by the Spanish Ministry of Economy, Industry and Competitiveness, from the grant PRX15/00036 from the Ministerio de Educación Cultura y Deporte, and from a sabbatical leave by the Carlos III University of Madrid
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
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