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 31 for “"random network"”.
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Simplified random network codes for multicast networks
Network coding is a method of data transmission across a network which involves coding at intermediate nodes. Network coding is particularly attractive for multicast. Building on the work done on random linear network codes, we develop a constrained, simplified code construction suitable for …
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Performance of random network coding for data dissemination
Network coding is an alternative to traditional store-and-forward routing and is known to be necessary to achieve network capacity. It has also been shown randomized network coding is robust, and far outperforms store-and-forward for multicast. While much focus has been on the data rates achievable …
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Control With Structural Constraints: Theory and Implementation
… localized control algorithm has been studied on random network. The benefit of such control algorithm is that we can design controllers prior to any knowledge of network.
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Spectral analysis in bipartite biregular graphs and community detection
This thesis concerns to spectral gap of random regular graphs and consists of two main con- tributions. First, we prove that almost all bipartite biregular graphs are almost Ramanujan by providing a tight upper bound for the non trivial eigenvalues of its adjacency operator, proving Alon's …
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Single video performance analysis for video-on-demand systems
… delivery 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 …
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Stability and Control in Complex Networks of Dynamical Systems
Stability analysis of networked dynamical systems has been of interest in many disciplines such as biology and physics and chemistry with applications such as LASER cooling and plasma stability. These large networks are often modeled to have a completely random (Erdös-Rényi) or semi-random …
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ESSAYS IN BEHAVIORAL ECONOMICS
… among alternatives can be revealed, or b) the network of consideration spillovers can be revealed. Using a novel laboratory experiment, I test a deterministic Network Choice model proposed in previous work and find a plethora of violations thereof, even at the individual level. I then propose a …
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Systemic risk in financial networks
… the literature of systemic risk in financial networks in two directions.</p> <p>First, we develop a majorization-based tool to compare financial networks in terms of systemic losses with a focus on the implications of liability concentration. Specifically, we quantify liability concentration …
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Computational Modeling of a-SiO₂ Nanoparticles and their Electronic Structure Calculation
… (NPs) are constructed from a previous continuous random network (CRN) model of a-SiO₂ with the periodic boundary. The models of radii 12 Å, 15 Å, 18 Å, 20 Å, 22 Å, 24 Å and 25 Å are built from the CRN structure. Then, three types of models are constructed. Type I has the surface dangling bonds not …
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Fluctuation Electron Microscopy of Medium-Range Order in Amorphous Silicon
… can be described by the conventional continuous random network model. The structure is better described by a paracrystalline model, which consists of strained topologically crystalline grains which may or may not be embedded in a more disordered matrix. Experiments show a continuous evolution of …
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Electrical and thermal characterization techniques for carbon nanotube transistors and networks
… increase the ION/IOFF ratio of carbon nanotube random network transistors is also demonstrated. The ratio is increased by three orders of magnitude, with minimal reduction in ION (< 50%). It is shown that adsorbed water rather than oxygen promotes nanotube breakdown. Finally, the design of an …
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Vibrations in elemental amorphous semiconductors
… presented for four-fold coordinated continuous random network (CRN) models of a-Ge, for a three-fold coordinated CRN model of a-As and for isolated- and interacting-chain models of a-Se. In order to obtain a more realistic description of the structure and vibrational and electronic behaviour of …
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(e,2e) spectroscopic investigations of the spectral momentum densities of thin carbon films
… compatible with a model of a-C based on small, randomly-oriented islands of quasi-2D graphite-like continuous random network structures. However, no definitive interpretations can be made until higher resolution experiments are performed on both a-C and single crystal graphite.
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Design and Implementation of Predictive Control for Networked Multi-Process Systems
… of the prediction method in the NMAS (networked multi-agent system) external consensus problem. The prediction method has been popular in networked single agent systems due to its capability of actively compensating for network-related constraints. This characteristic has motivated …
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CARBON NANOTUBE THIN FILM AS AN ELECTRONIC MATERIAL
… realized by controlling percolation effects in a random network. Transport properties of CNTs are affected by the local environment. To study the intrinsic properties of CNTs, the environmental effects, such as those due to contact with the dielectric layer and processing chemicals, need to be …
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Efficient flooding for wireless mesh networks
Flooding in wireless mesh networks involves distributing some data from one node to rest of the nodes in the network. This dissertation proposes UFlood, a flooding protocol for wireless mesh networks that targets large file transfers, such as software updates, where achieving high throughput …
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Persistent cascades and the structure of influence in a communication network
… the structure of influence in a communication network. We focus on cellular phone data, which provides a near-global population sample (in contrast to the relatively limited scope of social media and other internet-based datasets) at the expense of losing any knowledge of the content of the …
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Ab Initio Study of Amorphous Zeolitic Imidazolate Framework (A-ZIF) and Pyrophosphate crystals
… ZIF (a-ZIF) model from a near-perfect continuous random network model of a-SiO₂. The radial distribution function is in good agreement with measurements for amorphous aTZIF-4 but with notable fine differences. We confirm the retention of the metal tetrahedral bonding coordination in a-ZIF and the …
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First principles-based atomistic modeling of the structural properties of silicon-oxide nanomaterials
We have developed continuous random network (CRN) model based Metropolis Monte Carlo simulation tools which are capable of predicting the structural properties of amorphous semiconductor and oxide materials as well as their interface. To bolster the reliability of the CRN model, we have developed …
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Percolation in Two-Dimensional Grain Boundary Structures and Polycrystal Property Closures
… of standard lattice percolation models to a random 2-D grain structure is explored. A random network based on the triangle lattice is proposed as a more appropriate model, and results in a higher percolation threshold (0.711 compared with 0.653 for the standard hexagonal lattice). The triple …
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