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.
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Showing 1 to 20 of 23 for “"Cognitive Networks"”.
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Cognitive Networks
For complex computer networks with many tunable parameters and network performance objectives, the task of selecting the ideal network operating state is difficult. To improve the performance of these kinds of networks, this research proposes the idea of the cognitive network. A cognitive network …
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Cognitive Networks: Foundations to Applications
… the complexity is far more daunting. Research in cognitive networks seeks to provide a solution to the diffculty of effectively using the expanding capabilities of wireless networks by embedding greater degrees of intelligence within the network itself. In this dissertation, we address some …
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Island Genetic Algorithm-based Cognitive Networks
… and complexity of modern communication networks demands coupling network nodes with intelligence to perceive and adapt to different network conditions autonomously. Cognitive Networking is an emerging networking research area that aims to achieve this goal by applying distributed …
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Security Enhanced Communications in Cognitive Networks
… which will require the communication networks to efficiently manage the increasing complexity. Cognitive network has been envisioned as a new paradigm to address this challenge, which has the capability of reasoning, planning and learning by incorporating cutting edge technologies …
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Spectrum aggregation for dynamic spectrum access based cognitive networks
… Aggregation (SA) in Next Generation Mobile Networks (NGMN). First of all, the motivation behind SA for NGMN is investigated. SA is introduced to create large virtual carrier bandwidths for data hungry users by aggregating fragmented segments of spectrum. By using SA, multiple carriers with …
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A Business Framework for Dynamic Spectrum Access in Cognitive Networks
… technology has been limited because of the networks inability to adapt resulting in sub-optimal performance. Limited in state, scope and response mechanisms, network elements consisting of nodes, protocol layers and policies have been unable to make intelligent decisions. Modern networks …
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From Structure to Function: Social and Cognitive Networks in Children Born Very Low Birth Weight
… <1500 g) have an increased risk of social and cognitive impairments, which can affect their social and academic success at school. However, little is known about the functional and structural underpinnings of these impairments at preschool-age, an important transitional period in development, …
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Bridging the gap between theory and implementation in cognitive networks: developing reasoning in today's networks
Communication networks are becoming increasingly complex and dynamic. The networking paradigm commonly employed, on the other hand, has not changed over the years, and, as a result, performs poorly in today's environments. Only very recently, a new paradigm named cognitive networking has been …
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Dynamic speech networks in the brain: Dual contribution of incrementality and constraints in access to semantics
… 1) What are the network dynamics underpinning cognitive computations that take place when we map sounds to rich semantic representations? 2) How do the prior semantic and syntactic contextual constraints facilitate this mapping? Experiment 1 investigated the cognitive processes and relevant …
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Statistical modelling of congruence and association between perceptual and complete networks
"Structural analysis of social networks using statistical techniques has been evolving into sophisticated models for the last 60 years. These statistical models and techniques have been predominantly concerned with the structure of a global network. Statistical approaches to the analysis of …
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Contextual Constraints: An Examination of Implicit Followership Theories
… across time to assess the dynamism of the cognitive networks of implicit followership theories. Change in culture and immediate leader was measured at three time points, across six months, during the acquisition of one organization by a second. Change scores were created by computing …
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Cross-Layer Game Theoretic Mechanism for Tactical Mobile Networks
In recent years, Software Defined and Cognitive Radios (SDRs and CRs) have become popular topics of research. Game theory has proven to be a useful set of tools for analyzing wireless networks, including Cognitive Networks (CNs). This thesis provides a game theoretic cross-layer mechanism that can …
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Effectiveness of using structured aids in learning number concepts for middle primary school children
… materials aids the construction of internal cognitive networks by the learner in the building of conceptual knowledge. Knowledge formed in this way is rich in relationships and leads to better understanding of number and operational concepts. While the results of the study indicate that the …
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The neural correlates of social and non-social decision-making in resolving complex, dynamic uncertainty
… tool for modeling these processes, but the cognitive and neural dynamics that govern real-time appraisal during complex narratives remain underexplored. Across three studies, this dissertation investigated how individuals dynamically appraise social and non-social ambiguity using a 45-minute …
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More Than a Feeling: The Impact of Affect and Gender as Contextual Constraints on Perceptions of Emerging Leaders
… theorized recently some of this gender-related cognitive bias may be offset by perceiver affect (Medvedeff & Lord, 2007). In this experiment, a between-participants factorial design was used to examine the impact of gender stereotypes (male or female) and perceiver affect (positive or negative) …
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Toward a Distributed Actuation and Cognition Means for a Miniature Soft Robot
… and creating the infrastructure for distributed cognitive networks. There are many technical issues in designing soft robots, in terms of perception, actuation, cognition, power, physical structure and so on. We are focusing on actuation and cognition issues in this thesis. We investigated water …
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Cognitive Radar Detection in Nonstationary Environments and Target Tracking
… and stealthy targets, the concept of cognitive radars has been proposed to integrate intelligent modules into conventional radar systems. To achieve better performance, cognitive radars are designed to sense, learn from, and adapt to environments. In this dissertation, we introduce …
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Clustered wireless sensor networks
… of topology in randomly deployed wireless sensor networks (WSNs) is important in addressing the fundamental issue of stochastic coverage resulting from randomness in the deployment procedure and power management algorithms. This dissertation defines and studies clustered WSNs, WSNs whose topology …
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Traffic-Aware Channel Assignment for Multi-Transceiver Wireless Networks
… in multi-hop, multi-transceiver wireless networks. We investigate (1) how channels can be assigned throughout the network to ensure that the network is connected and (2) how the channel assignment can be adapted to suit the current traffic demands. We analyze a traffic-aware method for …
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