This paper aims to minimize the problems encountered in the handling of large amounts of visual data, proposing a scalable environment for distributed applications and information visualization (IV) with multiple coor...
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This paper aims to minimize the problems encountered in the handling of large amounts of visual data, proposing a scalable environment for distributed applications and information visualization (IV) with multiple coor...
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This paper aims to minimize the problems encountered in the handling of large amounts of visual data, proposing a scalable environment for distributed applications and information visualization (IV) with multiple coordinated views. The benefits of this architecture are improving the processing power for visualization tools, reduce the rendering time of visualization techniques, reducing the problem of occlusion and aggregation, among others. We will be presented usability testing, and comparative testing of performance (rendering time, memory usage, and processor) with an application of IV in a single desktop.
Energy reduction is a key issue for the design of real-time embedded systems. In this context, energy harvesting has emerged as a feasible option to increase the autonomy of battery-based real-time embedded systems an...
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Energy reduction is a key issue for the design of real-time embedded systems. In this context, energy harvesting has emerged as a feasible option to increase the autonomy of battery-based real-time embedded systems and became subject of intensive research. However, current studies usually rely on discrete driven in-house simulators or use mathematical models only. Unfortunately, those approaches hide several important aspects of real-time embedded systems, resulting in non-realistic and incomplete analyses. Moreover, they are not publicly available to the research community, making it difficult to reproduce results. In this paper we propose to use LITMUS-RT, an open-source real-time extension of the Linux kernel with a focus on multiprocessor real-time scheduling and synchronization, as an experimental platform for energy harvesting real-time systems research. Our results show that the proposed proof-of-concept solution implemented with LITMUS-RT allows researchers to study the behavior of real-time schedulers in the context of an energy harvesting real-time system, and could be integrated in the LITMUS RT kernel in the future.
Software Defined Networking (SDN) has emerged as a new paradigm that highly increase the network management flexibility through simple but powerful abstractions. The key idea is decoupling the control plane, which mak...
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Software Defined Networking (SDN) has emerged as a new paradigm that highly increase the network management flexibility through simple but powerful abstractions. The key idea is decoupling the control plane, which makes the forward decisions, from the data plane, which effectively makes the forward. However, the OpenFlow, the main SDN enabler, is designed mainly by wired networks characteristics. As consequence, Wireless Mesh Networks (WMNs) is not suitable for operating as control plane and many wireless networks features are neglected in the OpenFlow, e.g.: power control and network ID. In addition, there are few effort research to extend SDN to wireless networks and these existing works focus on very specific issues of this integration. In this paper, we propose an architecture to extent the OpenFlow functionalities in order to proper deal with wireless networks, including an approach for transporting the control plane over wireless multihop networks. The extensions include new rules, actions, and commands, which bring the network management flexibility to the wireless context. We validated our proposal by implementing and testing some extensions in a small real world testbed. As a proof of concept, we illustrate the OpenFlow capability of isolation between research and production traffics in a wireless backhaul.
Education is a motivating area for the use of technologies because the learning process can become more dynamic and interesting. Among the technological resources used in education, Educational Robotics stands out by ...
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ISBN:
(数字)9781665462808
ISBN:
(纸本)9781665462815
Education is a motivating area for the use of technologies because the learning process can become more dynamic and interesting. Among the technological resources used in education, Educational Robotics stands out by enabling the development of technological projects that can involve techniques of construction and manipulation of robots and enable the development of the creative process, logical reasoning, and interdisciplinarity. However, acquiring knowledge in this area can be a complex task since the learning objects are spread due to the increase in content production brought by the massive use of the Internet. Thus, the present work has as a general objective present RepositORE, a repository where these objects of Educational Robotics can be stored and searched by users who need to acquire specific abilities. For Educational Robotics objects to be found faster and achieve their technical and pedagogical goals, the system uses metadata for the correct description of stored objects based on the Dublin Core Metadata standard. To improve and simplify the search for objects, an adaptation and extension of the Dublin Core standard was made to represent the specific information for Educational Robotics. RepositORE allows users to insert new content and collaborate through complementing information from objects registered by other users.
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