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 53 for “"Flocking"”.
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Robotic control: real-time architectures and multi-flock flocking
… architectures. The second area covered is robot flocking. The dissertation first asks the question: should mobile robot control architectures include real-time capabilities. This is answered by creating, implementing and testing a real-time aware behavior-based mobile robot control architecture. …
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Consensus, Cooperative Learning, and Flocking for Multi-agent Predator Avoidance
… tasks. In nature the phenomenon of coordinated flocking is highly common with applications related to defending or escaping from predators. In this thesis a hybrid multi-agent system that integrates consensus, cooperative learning, and flocking control to determine the direction of attacking …
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Análisis de efectividad de dificultad dinámica utilizando Flocking Strategies y Dynamic Scripting
… en un laberinto top-down: Dynamic Scripting y Flocking Strategies, con el objetivo de evaluar y demostrar su eficiencia en mantener el estado de flow de los jugadores a comparación de la dificultad estática. Se contó con la participación de 15 jugadores en total divididos en dos grupos, quienes …
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Mister Parid's Neighborhood: Dispersal Behavior and Flocking Dynamics of the Social Black-crested Titmouse (Baeolophus atricristatus)
… passerine that has a tendency to form family flocking groups due to delayed juvenile dispersal each summer. A recently elevated species, separated from its sister-taxon, the tufted titmouse (Baeolophus bicolor), the BCTI is an ideal model species for studying family-flocking dynamics. The …
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Investigation of Communication Constraints in Distributed Multi-Agent Systems
<p>Based on a simple flocking model with collision avoidance, a set of investigations of multi-agent system communication constraints have been conducted, including distributed estimation of global features, the influence of jamming, and communication performance optimization. In flocking control, …
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Distributed Control Of Multi-Agent Systems Using Biologically-Inspired Reinforcement Learning
… this dissertation, we investigate the real-time flocking control of Multi-Agent Systems (MAS) in presence of system uncertainties and dynamic environment. To handle the impacts from system uncertainties and dynamic environment, a novel reinforcement learning technique, which is appropriate for …
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A Complex Adaptive Systems Analysis of Productive Efficiency
… associates the basic building blocks of the CAS 'flocking' metaphor with the essential building block concepts of Data Envelopment Analysis (DEA). Within a proposed framework DEA "decision-making units" (DMUs) are represented as agents in the agent-based modeling (ABM) paradigm. Guided by simple …
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Collective Motion in Spatially Heterogeneous Environments
… animal behavior. We study how obstacles affect flocking, developed an agent-based model of bat flight from experimental data, and explored a model-free classification tool for swarming datasets. In the first study, we incorporated physical violation rules to an existing canonical flocking model …
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Nonbreeding Foraging Ecology of the Brown-headed Nuthatch (<i>Sitta pusilla</i>)
… pine-savanna canopy flocks and recorded flocking and foraging behavior of Brown-headed Nuthatches (Sitta pusilla) in both natural conditions and following predator call playback at two publically managed sites in North Carolina, USA, over three years to determine what drives mixed-species …
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High Probability of Hiding (HPH) and Quality of Autonomy (QoA) Orientated 3D Transformative Intelligent Routing for Airborne Networks
… with same or similar tasks generally form a flocking network where each object is considered as an airborne node. High probability of hiding (HPH)-oriented communication, which aims to avoid easy signal detection by adversaries, is thus very important for a robust AN. To protect the data of …
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MECHANO-CHEMICAL FEEDBACK VIA CONTACT PERCOLATION REGULATES PHASE TRANSITION AND TRANSCRIPTIONAL STATE IN HETEROGENEOUS BREAST CANCER
… that percolation of RAB5A clusters drives flocking-fluid collective motility and activates an inflammatory gene program in neighboring control cells. Simulations and experimental validation show that a phenotypic switch mechanism allows control cells to acquire motility characteristics as a …
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Fault-tolerant distributed cyber-physical systems: two case studies
… The second case study is a distributed flocking problem, where agents form a flock, or a roughly equally spaced distribution in one dimension, and move towards a destination, in spite of some agents' actuators becoming stuck at some value. Each algorithm incorporates self-stabilization …
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Mathematical Models of Quorum Sensing
… study were constructed with the idea of relating flocking movements observed in birds to gene expression in quorum sensing. To this end, modified Cucker-Smale flocking equations which do not require detailed knowledge of signal transductions mechanisms or regulatory proteins are used to represent …
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Vocal responses of Blue Jays (Cyanocitta cristata) to raptors that differ in predatory threat
… in group-living organisms. Some species of flocking birds use referential calls to communicate predator presence and the level of threat posed by predators. Previous studies have revealed that two species in the corvid family, American Crows (Corvus brachyrhynchos) and Siberian Jays …
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Analyses of Greater Sage-Grouse (Centrocercus urophasianus) Translocation Release Methods and Chick Survival in Strawberry Valley, Utah
… mass, and source population had on mortality, flocking, and dispersal distance of translocated hens in 2006. We found that mortality and flocking rates were not influenced by release timing, hen age, body mass, or source population. Dispersal distances for hens released near a lek with actively …
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Invention and Contention: Place, Identity and Memory of the Spanish Past in the American Southwest, 1848-1940
… captivate and renew the many new white citizens flocking to rapidly growing cities. The history of Spanish colonialism in the area became a precious and exclusive cultural and economic resource. This dissertation tells the story of the commemoration of the Spanish past from 1848 to 1940 in three …
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Multi-agent Communication Protocols with Emergent Behaviour
… These behavioural rules allow a simple directed flocking behaviour to emerge. A flocking algorithm is used because it satisfies a major objective, i.e. it has a real time response to local environmental changes and minimises the cost of path planning. A higher level communication mechanism is …
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Persistent Stealthy Attacks and their Detection in Large Distributed Cyber-Physical Systems
… of non-compliant drones into a system of flocking drones is considered. An approach to detecting intrusions is proposed and tested in simulations. In both applications the residual sum metric is proposed as a basis for detection"--Abstract, p. iii</p>
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Behavioural ecology of lesser sheathbills Chionis minor at Marion Island
… (winter) adults within penguin colonies and flocking amongst birds foraging on the coastal plain. Time and energy budgets of birds feeding in these habitats were drawn up. Displays by Lesser Sheathbills were described and their functions in territories, flocks, at nest sites and in sexual …
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Experimental Characterization of Mode I Fracture Toughness of Reinforced Carbon Fiber Laminate with Nano-Cellulose and CNT Additives
… makes use of novel materials in the field of wet flocking and Z-pinning. Cellulose nanofibers (CNFs) have already demonstrated excellent mechanical properties in terms of stiffness and strength, originating at the nano-scale. These materials were introduced into the laminate while in a sol-gel …
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