1,720,964 research outputs found
Design and Development of Radio Systems of Monitoring and Emergency
No full textTo design an infrastructure for migrating the Sardinian
regional radio network for health emergency service from
analog to digital to meet the coverage requirement
RFID sensor network for workplace safety management
No full textLarge industrial environments are inherently complex systems to be monitored and controlled, given the presence of vehicles, people and industrial plants. In a context dominated by strict regulations for workplace safety, systems for monitoring and preventing workplace risks can have a particular importance. This paper describes the work in progress on designing and implementing an RFID-based sensor network for workplace safety management. The proposed system is based on Body Area Networks and passive RFID tags and sensors. The goal of the proposed system is to offer a detailed, constantly updated overview of an industrial environment in terms of workplace safety
DMR networks for health emergency management: A case study
No full textThis paper illustrates the Digital Mobile Radio (DMR) technology for mission critical applications, and evaluates its performance against other professional mobile radio (PMR) standards, with a special focus on TETRA. We also describe the design of a practical DMR network, i.e. the radio system for the health emergency service in Sardinia (Italy), and we illustrate the advantages of migrating from analog to digital technology. Finally, we discuss the capabilities of DMR technology to provide the best solution for a wide regional emergency network with cost saving constraints
Control system for workplace safety in a cargo terminal
No full textLarge industrial environments and specifically cargo terminals are inherently very complex systems to be monitored and controlled, given the presence of vessels, vehicles, people and industrial or commercial plants. In this context, dominated by strict regulations for workplace safety, a centralized control system for monitoring, reporting and preventing workplace risks can have a particular importance. This work describes the concepts of a real-time control system for acquiring and processing information for the continuous monitoring of workplace safety conditions. In the proposed system, we make use of specialized wearable sensor networks and specific aggregation methods, CCTV cameras combined with pattern recognition algorithms and data networks. The goal of the control system is to offer a detailed, constantly updated overview of the port's situation in terms of workplace safety
A passive Wi-Fi based monitoring system for urban flows detection
No full textThis paper presents an innovative vehicle monitoring system based on Wi-Fi sniffing devices and real-time data processing using machine learning techniques. Our solution involves the construction of a neural network-based multiclass classifier that can classify the incoming Wi-Fi signal from many sources based on the received signal strength. The solution was carried out by training the neural network to predict different output classes corresponding to different vehicular (0-30Km/h,30-60Km/h, 60-90Km/h, 90-120Km/h) and several pedestrian speed ranges among 0-15Km/h
Orientation Analysis through a Gyroscope Sensor for Indoor Navigation Systems
No full textLast years have been characterized by an incredible growth in mobile computing capabilities and sensing technologies, which can leverage the deployment of many location-based applications, ranging from pedometers to navigation system. This work deals with an Inertial Navigation System (INS) able to support users in the navigation in an unknown indoor environment by continuously calculating their motions and their position. The proposed solution is based on integrated use of movement and position sensors. Unfortunately, applications that rely on the use of measures coming from orientation sensors, such accelerometers and digital compasses, are affected by external magnetic interferences thus resulting in inaccurate directional information. This paper focuses on this problem by investigating the use of the gyroscope as the primary determinant of orientation. Several tests have been carried out showing how the proposed method is able to correct the error introduced by the gyroscope both in static position and undergoing rotation, and thus, it is able to provide better orientation information than the compass
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
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