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 85 for “"SWARMING"”.
-
Directional UAV swarming: a network perspective
… In this research, we would investigate a UAV swarming from a network perspective. Generally, multiple UAVs could form a swarming network. Each UAV serves as a network node. The links between UAVs are regarded as network data links. In Chapter 2, we will design a novel 2-layer MAC: We will …
-
DRONE SWARMING TACTICS IN A CONTESTED ENVIRONMENT
Drone swarms have emerged as a defining feature of modern warfare. This thesis uses agent-based simulation to examine how force composition, weapon technology, and decoy tactics shape the outcomes of swarm attacks. The model pits a layered defender equipped with a mix of weapon and sensor systems …
-
Two problems about coupled oscillators: transient dynamics and swarming
The conduct of coupled oscillators has long beguiled scientists. Here we study two models of such oscillators. The first is Peskin’s integrate-and-fire model. We focus on the transitory behavior, showing that in its infancy, synchrony looks much like aggregation. In the second model, we consider …
-
Heterogeneous defensive naval weapon assignment to swarming threats in real-time
This thesis develops an automated decision aid capable of generating defensive engagement profiles for use in naval shipboard defense. It allows the efficient pairing of multiple defensive weapon systems to several incoming threats operating in multiple domains by providing the operator with …
-
Inhibition of Proteus Swarming by the Metabolic Products of Serratia Marcescens
… Enterobacteriaceae, exhibit the phenomenon of swarming on moist agar media. Swarming is a cyclic pattern of active motility and stationary growth away from a point of inoculation giving rise to concentric rings of growth on the agar surface (Fig. 1). On media that is exceptionally moist, the …
-
An Image Compression Approach to Cooperative Processing for Swarming Autonomous Underwater Vehicles
Current wireless underwater communication technologies—i.e. underwater acoustic modems—are extremely bandwidth limited as compared to land-based wireless technologies. Additionally, acoustic modem technologies are not advancing at the same high rate as computing technologies. Therefore, it is …
-
Deep-learning-based transport layer control for big data transmission over UAV swarming networks
Multi-Beam Smart Antennas (MBSAs) achieve concurrent communications in multiple beams, thereby providing higher throughput compared to regular directional antennas. Most of the transport layer control schemes used in MBSA-equipped networks are based on TCP, which are too conservative since they …
-
Proposed in vitro model of neutrophil swarming in a chronic, low-level inflammatory state
… immune cell and their homotypic aggregation, or swarming, is a key mechanism in clearing pathogens greater than 20 μm in size. We hypothesize that neutrophil swarming ability is altered when in a low dose LPS primed state; potentially leading to an overall altered innate immune response in the …
-
Bat swarming as an inspiration for multi-agent systems: predation success, active sensing, and collision avoidance
… In the work of this dissertation, we used bat swarming as an inspiration for multi-agent systems to study various topics which include predation success, active sensing, and collision avoidance. To investigate the predation success, we modeled a group of bats hunting a number of collectively …
-
Chimera Ligand for Pili and Lectin A Protein Controls Antibiotic-Promoted Biofilm Formation, Swarming Motility, Tolerance and Persister Formation by Pseudomonas aeruginosa
… of Pseudomonas aeruginosa to inhibit both swarming motility and biofilm formation. The potential adjuvant agents of these chimera ligands that can increase the effectiveness of antibiotics were demonstrated. In addition, the ability of our adjuvant molecules to eliminate drug-tolerant …
-
The ecology and conservation of cave roosting bats in the Yorkshire Dales
… 2002 and 2005,53 cave entrances were logged for swarming activity using automated echolocation call loggers. A subset was chosen for continuous monitoring outside the hibernation period and another for winter logging. Logging was followed up by trapping at caves with significant autumn bat …
-
Antigenic and functional differences between the polar and lateral flagella of Azospirillum brasilense
… and also on medium solidified with carrageenan. Swarming also occurred on a dialysis membrane overlying SM, indicating that the nature of the solid surface may not be important. The effects of various physical and chemical factors on swarming were determined. A temperature of 30°C rather than the …
-
Controlling Microbial Multicellular Behaviors With Saccharide Derivatives
… behaviors like biofilm formation and swarming motility are known to increase their tolerance against antimicrobials. From microbial standpoint, nonmicrobicidal agents that do not impede growth are tolerable and therefore, there is a lower propensity to develop resistance against such …
-
Rational Development of Small Molecules Targeting Virulence of Pseudomonas aeruginosa
… project are the type III secretion system and swarming motility. During this project rational $\textit{in silico}$ drug discovery methods were used to identify small molecule inhibitors of ExsA, the master transcriptional regulator of the type III secretion system. The molecules were ordered …
-
The Role of CheV in S. typhimurium Chemotaxis
… the cheV gene had no effect on S. typhimurium's swarming ability and only a minor effect on the ability of S. typhimurium to sense/respond to serine and its ability to accomplish surface motility. My results also indicate that overexpression of the cheV gene disrupts S. typhimurium's swarming …
-
Characterization of cyclic-di-GMP signaling with the Lyme spirochete, Borrelia burgdorferi
… of rrp1 disrupted translational motion and swarming patterns by causing extended cell runs, eliminating stops/flexes, and reducing swarming capabilities. This was attributed to a defect in N-acetyl-D-glucosamine (NAG) metabolism and chemotaxis. NAG is a major source of nutrition for B. …
-
Collective Motion in Spatially Heterogeneous Environments
… explored a model-free classification tool for swarming datasets. In the first study, we incorporated physical violation rules to an existing canonical flocking model to understand obstacle-induced perturbations to flocking behavior. The findings revealed that obstacles introduce non-monotonic …
-
Discovering the Biological Activities of Maltose Derivatives for Controlling Bacterial Multicellular Behaviors
… behaviors, like biofilm formation and swarming motility, which are not essential for bacterial survival but are critical for infections. Consequently, the use of such nonmicrobicidal agents is less likely to induce evolution of bacterial genes. The use of two different kinds of …
-
Characterization of major virulence regulators of Erwinia amylovora
… mutants of envZ/ompR and grrA/grrS have opposite swarming motility phenotypes. In order to determine how the two systems interact, two triple mutants, envZ/ompR/grrA (ERA) and envZ/ompR/grrS (ERS) were generated. Our results showed that both triple mutants had slightly increased virulence on apple …
Page 1 of 5