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 129 for “"Coevolution"”.
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ECOLOGICAL PERSPECTIVES ON HOST-PARASITE COEVOLUTION
… parasite antigenicity loci, maintained by coevolution in pathosystems, is common and can persist for millions of years. Such polymorphisms and how they persist or break down are both fundamentally interesting and important for human health and agriculture. Examples include the major …
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Protein Engineering via in Vitro Coevolution
… a simple and efficient method---in vitro coevolution---for the creation of novel protein functions in an existing protein scaffold. The in vitro coevolution method involves the design of a hypothetical pathway toward the target protein function followed by stepwise directed evolution of an …
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Coevolution between brood-parasitic honeyguides and their hosts
… both species' evolution — a process known as coevolution — has forged the natural world around us. Avian brood parasites and their hosts are now model systems for studying such coevolutionary interactions between species, providing striking examples of the adaptations that arise when the life …
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Human Origins: Hidden Nonlinear Dynamics in Brain-Culture Coevolution
… and cooperation are interlocked in coevolutionary embrace, they can produce two distinct regimes that resemble observed differences in the cultural behaviour of human and nonhuman animals. When natural selection favours small scales of cooperative information sharing, storage …
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Protein Coevolution and Coadaptation in the Vertebrate bc1 Complex
… complex, selection was characterized in terms of coevolution and coadaptation. Coevolution is described as reciprocal local biochemical shifts based on phylogenetic location and results in overall maintenance. Coadaptation, on the other hand, is more dynamic and is described as coordinated local …
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Deep learning and coevolution reveal proteome-wide protein-protein interactions
… protein structure prediction models capture coevolutionary information at significantly higher resolution than statistical methods and we exploit this coevolutionary signal to computationally predict protein-protein interactions with high accuracy based on gold-standard benchmarks. We create …
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Evolutionary algorithm for multiobjective optimization: Cooperative coevolution and new features
… for multiobjective optimization. A cooperative coevolution mechanism is introduced into multiobjective optimization, which evolves multiple solutions in the form of cooperative subpopulations. The cooperation among subpopulations is achieved through the sharing of archive and representatives of …
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Coevolution of Heliconius spp. and Passiflora spp. : a phylogenetic comparison
… phylogenetic examination of this association for coevolution. To test the HeliconiuslPassilfora association for coevolutionary congruence, phylogenies for each group were established and compared. The phylogeny for 14 species ofHeliconiinae from Costa Rica was based on combined sequence data from …
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Analyzing Multi-Agent Reinforcement Learning and Coevolution in Cybersecurity Simulations
… to generate enterprise network samples. We apply coevolution to this challenging environment, and, in a novel modeling approach for this problem, interpret each population as a distribution over fixed strategies to form a mixed strategy Nash equilibrium. We compare the results to solutions …
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The plastid caseinolytic protease complex as a model for cytonuclear coevolution
Coevolution, or evolution in response to reciprocal selective pressures, is important to biological function and the persistence of populations. Competition or mutualisms between organisms can drive coevolution, as can predatory or parasitic relationships. However, coevolution also occurs within …
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The phylogenesis of palaeoarts, and their coevolution in relation to artification
… exploiting this toolkit that evolved following coevolutionary trajectories with socio-cognitive niches in later hominins. I conclude that artification has a mosaic evolution, and that the first instances of art-making can be tracked back to the Early-Acheulean ≈ 1.7 mya.
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Coevolution and consequences of symbioses between aphids and maternally transmitted bacteria
… known about their roles in aphid biology or the coevolutionary histories of these symbioses. I have addressed these mysteries in this dissertation, through use of molecular and experimental analyses. My findings reveal that secondary symbionts are diverse and infect members of numerous aphid and …
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Coevolution of plastid genomes and transcript processing pathways in photosynthetic alveolates
Following their endosymbiotic uptake, plastids undergo profound changes to genome content and to their associated biochemistry. I have investigated how evolutionary transitions in plastid genomes may impact on biochemical pathways associated with plastid gene expression, focusing on the highly …
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Tilters with windmills--the coevolution of the appropriate technology movement in America
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Political Science, 1988.
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Modeling, simulation and visualization of stability and support operations using coevolution: Concepts and environment
… extends the use of genetic algorithms to coevolution, a multi-sided genetic algorithm, for non-conventional warfare operations, termed Stability and Support Operations (SASO), which constitute many of the current major military operations in the world. It presents the concepts for a system …
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Strategic change in the pharmaceutical industry 1992-2002: evolution and coevolution of firms' grand strategies
… to a global oligopoly. In the ecology literature coevolution theory proposes that V competing species (incumbent firms) interact and shape each others’ development, and V that this in turn potentially shapes the community (industry) structure. This suggests that when exploring how firms’ …
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Strategic change and the coevolution of industry-university relationships : evidence from the forest products industry
In this thesis we present an analysis of the dynamics of industry-university relationships tracing the origin of the relationship and its changes over time as the firm's strategies evolve. We analyze the strategic trajectories of nine European and North American forest products companies, …
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Coevolution of Small Business Strategy and Regulation: A Mixed-Methods Study of United States Craft Breweries
This dissertation asks how do small firms overcome regulatory constraints despite powerful opposition? Significant research has documented the nonmarket strategies of large, multinational firms seeking to benefit from and capture regulatory systems. However, despite the historically important role …
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The relative influence of competition and coevolution on the community structure of insectivorous bats in Southern Africa
… based on predictions from competition and coevolution hypotheses. Each of the competing hypotheses was considered from a number of different perspectives to provide multiple opportunities from which to uncover the mechanism that could result in non-random patterns of community structure. I …
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