Open Hypermedia have come up with several systems, which can provide services to software developers. This paper argues that usability is a critical attribute that should be taken into consideration during the develop...
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In this paper, we present the design principles for virtual spaces and two different tools as solutions for supporting e-collaboration and multi-user communication in web-based learning communities. The first solution...
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Unicast mechanisms for the adaptive transmission of multimedia data can be used for the transmission of multimedia data over heterogeneous networks, like the Internet with the use of one unicast stream for each receiv...
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作者：
Cai, YangAbascal, JulioCarnegie Mellon University
Ambient Intelligence Studio Cylab CIC 2218 4720 Forbes Avenue PittsburghPA15213 United States University of the Basque Country
Dept. of Computer Architecture & Technology School of Informatics Laboratory of Human-Computer Interaction for Special Needs Manuel Lardizabal 1 Donostia20018 Spain
Two architectures for parallel-prefix modulo 2n - 1 adders are presented in this paper. For large wordlengths we introduce the sparse modulo 2n - 1 adders that achieve significant reduction of the wiring complexity wi...
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ISBN:
(纸本)9789972611001
Two architectures for parallel-prefix modulo 2n - 1 adders are presented in this paper. For large wordlengths we introduce the sparse modulo 2n - 1 adders that achieve significant reduction of the wiring complexity without imposing any delay penalty. Then, the Ling-carry formulation of modulo 2n - 1 addition is presented. Ling modulo adders save one logic level of implementation and provide high-speed solutions for smaller adder widths, where wiring complexity is small. The performance of the proposed adders has been validated with static CMOS implementations. In all examined cases, the proposed designs achieve significant savings in both area and delay compared to previously published architectures.
In this paper a quantum computer based on the recombination processes happening in semiconductor devices is presented. A "data element" and a "computational element" are derived based on Schokley-R...
This papers reports the advances in Optical Core networks research coordinated in the framework of the e-Photon/ONe and e-Photon/ONe+ networks of excellence.
ISBN:
(纸本)1424402212
This papers reports the advances in Optical Core networks research coordinated in the framework of the e-Photon/ONe and e-Photon/ONe+ networks of excellence.
This paper presents our work in the framework of the 6NET project, regarding the design, implementation and testing of a QoS service in a large-scale IPv6 network. The DiffServ mechanism for providing QoS guarantees, ...
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ISBN:
(纸本)9781622763504
This paper presents our work in the framework of the 6NET project, regarding the design, implementation and testing of a QoS service in a large-scale IPv6 network. The DiffServ mechanism for providing QoS guarantees, is generally preferred over IntServ. However, the current support for QoS mechanisms in IPv6 implementations still lags behind QoS support in IPv4. Furthermore, the new Internet Protocol introduces a different network environment in many aspects and therefore the QoS services should be specifically designed and evaluated for IPv6. In order to evaluate this different behaviour, large-scale experiments have been carried out within the scope of the 6NET project. This paper describes the results from the experimentation with the DiffServ mechanism on a large-scale native IPv6 network that aims to service aggregates of real time traffic with minimum delay, jitter and packet loss.
UNITS, the successor of GSM, is evolving toward a future wireless all-IP network. In this paper we present how it supports real-time IP multimedia services, as these services are expected to drive the adoption of wire...
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ISBN:
(纸本)0780390199
UNITS, the successor of GSM, is evolving toward a future wireless all-IP network. In this paper we present how it supports real-time IP multimedia services, as these services are expected to drive the adoption of wireless all-IP networks. The scheme of real time streaming video is one of the newcomers in wireless data communication and in particular in UNITS, raising a number of novel requirements in both telecommunication and data communication systems. This scheme applies when the mobile user is experiencing real time multimedia content. In this paper, we describe the design and the implementation of a decision feedback scheme, which is based on real time protocols and it is used for streaming video over UNITS transport channels. The decision feedback scheme uses a friendly, to the mobile users, congestion control mechanism to control the transmission rate of the real time video sequence. Furthermore, we evaluate this mechanism through a number of experiments. During these experiments we demonstrate the friendly behavior of the decision feedback scheme to TCP and UDP data streams that coexist in the same channel with the video sequence.
In science learning, cognitive concepts that are distinguished for the complexity of their structure and operation can be understood by using successful metaphors. Conventional instruction is ineffective in dealing wi...
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ISBN:
(纸本)0889864802
In science learning, cognitive concepts that are distinguished for the complexity of their structure and operation can be understood by using successful metaphors. Conventional instruction is ineffective in dealing with misconceptions. We propose a semantic learning interventions management system that utilizes web services technology. The proposed system aims to be an integrated educational solution that offers interoperable, web service-based, cross-platform learning services. It extends the available educational logic and content by publishing and consuming educational web services. Additionally, the combination of Web Services and Semantic Web offers sophisticated capabilities including automated discovery, composition, invocation, and monitoring.
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