Search results for: Klara Nahrstedt
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IEEE Transactions on Smart Grid > 2017 > 8 > 5 > 2305 - 2313
Dynamic contactless charging is an emerging technology for charging electric vehicles (EVs) on the move. For efficient charging and for proper billing, dynamic charging requires secure communication between the charging infrastructure and the EVs that supports very frequent real-time message exchange for EV authentication. In this paper, we propose Portunes+, an authentication protocol for charging...
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Scientific workflows have become a popular computational model in a variety of application domains, such as astronomy, material science, physics, and biology. As scientific applications are moving to the cloud to take advantage of the elasticity and service level agreement of resources, there has been a number of recent research efforts on cloud-based workflow systems that support various types of...
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The recent proliferation of increasingly capable mobile devices has given rise to mobile crowd sensing (MCS) systems that outsource the collection of sensory data to a crowd of participating workers that carry various mobile devices. Aware of the paramount importance of effectively incentivizing participation in such systems, the research community has proposed a wide variety of incentive mechanisms...
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In this paper, we present a data acquisition and analysis framework for materials-to-devices processes, named 4CeeD, that focuses on the immense potential of capturing, accurately curating, correlating, and coordinating materials-to-devices digital data in a real-time and trusted manner before fully archiving and publishing them for wide access and sharing. In particular, 4CeeD consists of novel services:...
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This paper presents Physical Representation Description (PRD), a method for representing the spatial relationship between sources of multimedia streams in physical environments. PRD is an extension for the most widely used video streaming standard DASH. DASH supports the delivery of multiple synchronized streams (e.g., video, audio and sensor data) from a server to multiple clients, however DASH does...
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The current Smart Grid supervisory control and data acquisition (SCADA) systems are primarily protected at the perimeter level with firewalls at the boundary of the networks. However, besides the attacks coming from the external Internet, internal attacks are equally concerning. Therefore, systems need to be protected from internal attacks within the perimeter. In Smart Grid, the Field Devices (FDs)...
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Multimedia is probably one of the most overused terms of the 90s (for example, see [Sch971). The field is at the crossroads of several major industries: computing, telecommunications, publishing, consumer audio-video electronics, and television/movie/broadcasting. Multimedia not only brings new industrial players to the game, but adds a new dimension to the potential market. For example, while computer...
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X.media.publishing > Multimedia Systems > 183-240
Anetwork-enabling multimedia system lets you exchange discrete and continuous media data between devices, which generate and process these types of data. This communication requires appropriate services and protocols for data transmission.
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Studies in Fuzziness and Soft Computing > Soft Computing in Communications > Fuzzy Logic and Neurofuzzy Systems > 245-267
More and more distributed multimedia applications are becoming an integral part of our computing and communication environment. To achieve this goal, the multimedia applications must be delivered with high Quality of Service (QoS). This is a challenge as the distributed multimedia applications run on top of general purpose operating systems and networks that have been developed for best-effort data...
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As more and more information systems are moving to the cloud, there have been efforts to deploy publish-subscribe (or pub/sub) systems in the cloud environment to take advantage of the elasticity of resources. As a result, there is a need to perform resource management for the cloud-based pub/sub systems that support various types of jobs, each consists of a series of tasks, or a workflow. Designing...
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User-generated content, such as short video snippets or tweets, is increasingly used in event coverage even by professional media outlets. Especially in unforeseen events, or when dealing with large crowds, these snippets provide unique perspectives on the scene. While uploading a tweet does not impose much load on the communication system, uploading live video at today's camera resolutions consumes...
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Recent years have witnessed the proliferation of mobile crowd sensing (MCS) systems that leverage the public crowd equipped with various mobile devices (e.g., smartphones, smartglasses, smartwatches) for large scale sensing tasks. Because of the importance of incentivizing worker participation in such MCS systems, several auction-based incentive mechanisms have been proposed in past literature. However,...
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The raising concerns of energy consumption and air pollution advance the development of electric vehicle technologies and promote the increased deployment of Electric Vehicles (EVs) towards electric transportation. The increasing number of EVs on the road network leads to a growing challenge of electricity management for the power grid to promptly supply electricity to EVs. In order to address this...
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Recently, several works propose monitoring approaches for the emerged paradigm of Software-defined Networking. These provide a couple of ideas to retrieve various information about the network state leveraging new concepts for monitoring data collection at flow-level. As existing approaches reduce their scope to networks with a single controller, even sophisticated approaches ignore a potentially...
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X.media.publishing > Multimedia Systems > 1-7
Multimedia is probably one of the most overused terms of the 90s (for example, see [Sch97]). The field is at the crossroads of several major industries: computing, telecommunications, publishing, consumer audio-video electronics, and television/ movie/broadcasting. Multimedia not only brings new industrial players to the game, but adds a new dimension to the potential market. For example, while computer...
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X.media.publishing > Multimedia Applications > 23-50
Many functionalities of modern multimedia applications, particularly the timecritical ones, which are available today as products, have usually been written in conventional procedural programming languages (e.g., C). Multimedia-specific functions, such as adjusting the volume while playing back an audio clip, are often still called or controlled via hardware-specific libraries. Also, parts of the...
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It is widely accepted that in order to deliver the best Quality-of-Service (QoS), applications need to be adaptive to the fluctuating computing and communication environments. The middleware layer may assist by controlling the behavior of the applications so that they adapt and reconfigure themselves. In this paper, we present QualProbes, a set of middleware QoS Probing and Profiling services to discover...
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X.media.publishing > Multimedia Systems > 9-76
Quality of Service and Resource Management are basic concepts and central focus in multimedia systems. Data of continuous media needs real-time processing, communication and presentation to delivery their desired media quality to the user. Hence, the overall system, i.e., each computing and communication service component in the end-to-end path must respond to the real-time requirements, and support...
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Different distributed component-based applications (e.g., distributed multimedia, library information retrieval, secure stock trading applications), running in heterogeneous execution environments, need different quality of service (QoS). The semantics of QoS requirements and their provisions are application-specific, and they vary among different application domains. Furthermore, QoS provisions vary...
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Lecture Notes in Computer Science > Interactive Distributed Multimedia Systems and Telecommunication Services > 153-162
We present a soft real-time CPU server for Continuous Media processing in the UNIX environment. The server is a daemon process from which applications can request and acquire soft real-time QoS (Quality of Service) Guarantees. Our server architecture addresses in addition to other multimedia CPU scheduling extensions properties such as fairness, QoS brokerage and enforcement, and security. Overall...
