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 88 for “"bursty"”.
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Detecting and analyzing bursty events on Twitter
This thesis presents BurstMapper, a system for detecting and characterizing bursts of tweets generated by multiple sources in order to understand interactions between Twitter users and the role of exogenous events (not directly observable on Twitter) in driving tweets. The first stage of the system …
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Network resource allocation for bursty ATM traffic sources
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Investigating bursty star formation and interstellar medium conditions in low-mass galaxies
… have found observational evidence of this "bursty" star formation in low-mass galaxies. Bursty star formation provides a plausible solution to the cusp/core problem within the Lambda Cold Dark Matter (LCDM) model. Observations of neutral hydrogen in low-mass galaxies show a flat central …
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A new approach in the transient analysis of ATM multiplexers with bursty sources
In this dissertation, we propose a new approach for the queueing analysis of discrete-time queues with correlated arrivals, arising in the ATM environment. In the first part of this work, we focus on the discrete-time transient analysis of a single server ATM multiplexer, where the arrival process …
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Performance Evaluation and Prediction of 2-D Markovian and Bursty Multi-Traffic Queues. Analytical Solution for 2-D Markovian and Bursty Multi-Traffic Non Priority, Priority and Hand Off Calling Schemes.
… priority and hand off calling scheme for bursty traffic are devised. Moreover extensions are carried out towards the analysis of a multi-traffic M/M queueing system and state probabilities are calculated analytically.
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Dynamic bandwidth allocation in ATM networks
… methodologies to transport new emerging bursty traffic types in ATM networks. However, existing ATM traffic management solutions are not readily able to handle the inevitable problem of congestion as result of the bursty traffic from the new emerging services. This research basically …
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"Gene regulation in Escherichia coli beyond the ""rate"" approximation"
… are stochastic and exhibit intermittent, bursty behavior, in bacteria as well as higher organisms. Thus the transcriptional time-series cannot be fully described by a simple chemical “rate”—the probability per unit time of transcribing an mRNA molecule. An important consequence of this …
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Dynamic Code Sharing Algorithms for IP Quality of Service in Wideband CDMA 3G Wireless Networks
… make inefficient use of wireless bandwidth for bursty data traffic sources with different Quality of Service (QoS) requirements. The purpose of this research was to develop an algorithm for the assignment of OVSF spreading codes in a Third-Generation (3G)Wideband CDMA (WCDMA)system. The goal of …
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Performance modeling of congestion control and resource allocation under heterogeneous network traffic. Modeling and analysis of active queue management mechanism in the presence of poisson and bursty traffic arrival processes.
… control for various traffic types, such as non-bursty Poisson and bursty Markov-Modulated Poisson Process (MMPP) traffic. Specifically, the Markov analytical models are developed for AQM congestion control scheme coupled with queue thresholds and then are adopted to derive expressions for …
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A performance analysis of a modified leaky bucket mechanism
… mechanism. A traditional LB can either police a bursty source's Peak Cell Rate (PCR) or Average Cell Rate (ACR) but not both of them simultaneously, meanwhile, it introduces cell delays by buffering cells before they are transmitted into the network. In this thesis, we propose a modified Leaky …
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Network Requirements for Distributed Machine Learning Training in the Cloud
… Nvidia A-100 cluster to determine the impact of bursty and non-bursty cross traffic (such as web-search traffic and long-lived flows) on the iteration time and throughput of distributed training. By varying the cross traffic load, I measure the impact of network congestion on training iteration …
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Simulation Study of an ADSL Network Architecture: TCP/IP Performance Characterization and Improvements using ACK Regulation and Scheduling Mechanisms
… transfer using different traffic mixes including bursty and non-bursty types of traffic. Bi-directional data transfer over asymmetric links results in ACK compression wherein TCP acknowledgements (ACKs) get bunched together behind larger data packets, further exacerbating the effect of asymmetry …
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Multiple access networks over finite fields : optimality of separation, randomness and linearity
… as well as when each transmitter transmits in a bursty fashion according to a Bernoulli process. For the case when both transmitters always transmit, we propose a systematic code construction and show that it achieves the maximum code rate and capacity. We also propose a systematic random code …
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Control policies for scheduling of semiconductor manufacturing plants
… due-date-based policies subject to deterministic bursty arrivals. By stability, we mean that the work-in-process in the system is bounded for all time, or equivalently, the delay of a job flowing through the system is bounded. Not all buffer priority policies are stable, as witnessed by a …
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Multiple access protocols for multichannel communication systems
… for the transmission of messages from bursty sources on multiple channels. We will consider traditional protocols such as Time Division Multiple Access (TDMA) and Slotted ALOHA (S-ALOHA) alongside a channelized architecture, which is based on the idea of multiplexing by dividing total …
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A Dynamic Coupled Magnetosphere-Ionosphere-Ring Current Model
… moving in from the tail and may be related to bursty bulk flows and bubbles seen in observations. As with most complex numerical models, there is the ongoing challenge of untangling numerical artifacts and physics, and we find that while there is still much room for improvement, the results …
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A Multidimensional Characterization of MUIR Backscatter Spectra Resulting from Ionospheric Heating Experiments Performed at HAARP
… not been previously studied, for instance, the “bursty” plasma lines. Through a collaborative effort with the University of Michigan’s RAX-2 satellite, we saw that the small cubesats may be able to detect artificially produced ionospheric irregularities such as AFAI during continuous heating …
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Performance and Security Trade-offs in High-Speed Networks. An investigation into the performance and security modelling and evaluation of high-speed networks based on the quantitative analysis and experimentation of queueing networks and generalised stochastic Petri nets.
… infrastructure-less high-speed networks under bursty traffic conditions. Specifically, investigations are carried out focusing, for illustration purposes, on high-speed network routers subject to Access Control List (ACL) and also Robotic Ad Hoc Networks (RANETs) with Wired Equivalent Privacy …
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Cognitive optical network architecture in dynamic environments
… environments than today's networks use. The bursty and large data transactions introduced by new technological applications can cause both high costs and extreme congestion in networks. The prohibitive cost of massive over-provisioning will manifest as huge congestions during peak demand …
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