Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 154 for “"network topologies"”.
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Dynamic Causal Modeling Across Network Topologies
… strategy for a given cognitive task. The logical network topology of the model is specified by a combination of prior knowledge and statistical analysis of the neuro-imaging signals. Parameters of this a-priori model are then estimated and competing models are compared to determine the most likely …
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Distributed load balancing over directed network topologies
… and the increasing availability of high speed networks, it has become possible to interconnect various geographically distributed computational elements (nodes) so that they can work cooperatively and obtain a performance not attainable by individual nodes. In the literature, distributing the …
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Topology-aware distributed graph processing for tightly-coupled clusters
… applications in tightly-coupled clusters and network topologies, namely super-computers. Specifically, we look at a class of distributed machine learning systems called distributed graph processing systems, and run them on NCSA Blue Waters. Partitioning the graph is key to achieving …
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Optimal transmitter placement in wireless mesh networks
Wireless mesh networks are systems of wireless access points interconnected in a mesh to provide digital services to client devices via radio transmission. We consider the challenges of quickly and optimally designing a wireless mesh network. We focus on maximizing client coverage area by choice of …
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Increasing the survivability of long distance fiber optic networks
… of topology in relation to the survivability and network cost. Studying three simple network topologies, the ring, hub and mesh topologies, the ring topology is found to have many advantages for high capacity communication systems. Combinations of the simple network topologies may be used to …
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Robustness of complex networks to global perturbations
… studies the robustness of complex dynamical networks with non-trivial topologies against global perturbations, following Robert May’s seminal work on network stability, in order to find critical stability thresholds of global perturbations and to determine if their impact varies across …
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Software-Hardware Optimizations for Efficient Collective Communications in Distributed Machine Learning Platforms
… understand the tightly coupled design space of networking in distributed ML platforms. First, it introduces ASTRA-sim2.0, an end-to-end simulation and modeling framework that enables comprehensive design space exploration of distributed ML platforms with arbitrary parallelization strategies and …
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Clock distribution network techniques
Clock distribution networks are essential to synchronous systems. The design of these networks affects the system performance dramatically and sometimes determines whether the chip can function properly or not. This thesis first describes in detail how a synchronous system works. Based on the …
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Simulating high-throughput cryptocurrency payment channel networks
… transactions with few blockchain broadcasts. Networks of payment channels have emerged as a proposed solution to Bitcoin’s scaling problem. Since the proposal of the first payment channel network, the Lightning Network, alternatives promising significant improvements, such as the Sprites …
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Network-layer Selective Security
<p>The Internet and other large computer networks have become an integral part of numerous daily processes. Security at the network layer is necessary to maintain infrastructure survivability in the case of cyber attacks aimed at routing protocols. In order to minimize undesired overhead associated …
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Single video performance analysis for video-on-demand systems
… video-on-demand systems under static random network topologies with fixed heavy-tailed video demand. The performance measure is the amount of server load; we wish to minimize the total download rate for all users from the server and maximize the rate from caches. Our approach reduces the …
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PROTOTOUCH a system for prototyping ubiquitous computing environments mediated by touch
… Two versions of the system utilizing different network topologies have been created, and several example applications utilizing the system have been developed.
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Characterizing capital and operational tradeoffs resulting from fiber-to-the-home optical network architecture choice
… current literature in the areas of large-scale network design, multi-attribute population characterization, and cost modeling. Three technologies representing near, mid, and long-term fiber-to-the-home gigabit passive optical network solutions, and seven implementation strategies are dimensioned …
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Dynamic Signal Coordination Models for a Network With Oversaturated Intersections
… a dynamic signal coordination model (DSCM) for a network (one-way and two-way streets) with oversaturated intersections. The model is formulated as a discrete optimization problem with the objective to maximize the number of vehicles released by the network. The disutility function is introduced …
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Real time monitoring for tank level based on ISA100.11A using star topology
… focus of this project is focused on a different network topologies, namely STAR protocol to be used by ISA100.11a. These networks are used to gain a faster response time within a range of less than 100M. The response time is obtained for both the network topology can be used to control digital …
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Study of router software performance
… for organizations which demand the optimal network quality. Because processing capability has heavy influence to communication networks [1], we need a benchmark for network administrators to choose the routers with the best performance per demand. However, it is hard to find such benchmark at …
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Content Distribution in Overlay Multicast
… overlay-based solution at saving server load and network bandwidth consumption compared to the ideal IP-multicast-based solutions. Second, regarding the high throughput challenge, using multi-commodity flow theory, we establish the theoretical foundation for multi-tree overlay multicast. Based on …
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A pragmatic testbed for distributed systems
… for understanding, and experiment with virtual network topologies. We show its versatility through three case studies that utilize the testbed for designing a service based solution, implementing a theoretical algorithm, and developing our own methodology to find high-risk edges. The results of …
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Efficient simulation of interconnection networks
… a modular, general-purpose interconnection network simulator called NETSIM developed as an extension to YACSIM, a C-language based process-oriented discrete event simulator. NETSIM is capable of simulating a wide range of switch architectures and network topologies. A NETSIM model can be …
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