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 286 for “"Natural systems"”.
-
Organolead Compounds in Natural Systems
… toxicity or accumulation of these compounds in natural systems, such as bivalve molluscs. These animals are an essential part of the diet of coastal birds and may have accumulated alkyllead to concentrations that were acutely toxic to the birds. Data reported in this thesis indicate the …
-
Interfacial fluid dynamics inspired by natural systems
Many natural systems interact with the interface between air and liquids on a daily basis. Plants like the lotus that have self-cleaning leaf surfaces and animals that intake fluids in a variety of ways are all examples of these systems. Plants and animals exploit interfacial fluid dynamics in a …
-
A Study of Lead Alkylation in Natural Systems
… several workers have investigated the effects of natural sediments on solutions of lead salts and reached the conclusion that sporadic biological methylation of lead takes place. In contrast, data presented in the following chapters suggests a number of possible reasons for the apparent …
-
Tannin geochemistry of natural systems: method development and application
… to terrigenous organic matter cycling in aquatic systems. However, virtually nothing is known at the molecular level about tannin diagenesis despite the increased sensitivity and unambiguity of molecular characterizations vs. bulk techniques. Due to the analytical challenges in measuring tannin …
-
A re-connection : modeling built works after natural systems
… operations of centralized, unintelligent systems. This inefficient organization encourages the destructive processes of production and consumption to remain unaccountable, broadening the disparity between the built environment and the natural ecosystem. Similarly, there is an increasing …
-
Essays on Water Policy and Coupled Human and Natural Systems
Human and freshwater ecosystems are intrinsically interconnected. To better design effective policies, modeling tools and valuation methods are necessary to help understanding the complex reciprocal linkages between ecosystem processes and human actions, and coupled human and natural systems (CNHS) …
-
The dynamics and resilience of river cities as coupled human-natural systems
… to be destructive to river-floodplain ecosystems through the homogenization of the biophysical environment and elimination of periodic flooding that maintains ecological functions. Despite these recognitions, it is still widely believed that flood control is indispensable in cities and …
-
Properties of natural systems and the efficiency of market-based solutions to environmental externalities
… how the interaction between economic and natural systems affects the efficiency of policy instruments to regulate environmental externalities. In the first study, I use a population data set of irrigation wells in Nebraska's Republican River Basin to analyze whether adopting spatially …
-
Modeling lake ecosystem change within coupled human-natural systems to improve water resources management
Lake ecosystems are sentinels of change in a landscape, integrating upstream terrestrial and aquatic effects of climate and land use drivers. Climate and land use change is mediated by socio-cultural and economic processes, resulting in complex responses in lake ecosystems as a part of coupled …
-
Ecological Perspectives on Cannabis sativa Phytochemistry: Biotic Interactions and Abiotic Stress in Managed and Natural Systems
… across environmental conditions and cultivation systems. This dissertation takes an ecological lens to Cannabis phytochemistry, combining observational surveys, comparative analyses, and field experiments to explore how chemical traits structure arthropod communities across both natural and …
-
Studying coupled human and natural systems from a decentralized perspective: the case of agent-based and decentralized modeling
The science of coupled human and natural systems deals with the interactions between humans and their environment. This science focuses on the complex dynamics and patterns that emerge through these interactions. One of the most insightful ways to study coupled human and natural systems consists in …
-
The growth of E. coli at various phosphate concentrations
… arisen as to its causes in different types of natural systems. Investigations were made of the stimulatory and limiting effects of phosphate on the bacterium E. coli in synthetic media. Growth was measured in batch and continuous flow cultures using both turbidimetric and respirometric …
-
Park Park Fabric Landscape: Landscape Systems Give Form to Architecture
… crisis. We must change how we consume and affect natural resources on the planet if we are to retain its richness of landscapes and biodiversity. It is our job as landscape architects to lead the way in changing the human relationship to natural resource consumption and building. My thesis asks …
-
Anthills built to order : automating construction with artificial swarms
… no centralized control or preplanning. These natural systems motivate investigating the use of artificial swarms to automate construction or fabrication. The goal is to be able to take an unspecified number of simple robots and a supply of building material, give the system a high-level …
-
Living on the land: redesigning land use relationships in the Philippi Horticultural Area
… it will put even further pressure on the current natural systems and water resources, as well as the historic presence of agriculture in the PHA. A new approach is required using landscape-based urban design to tackle what would usually be a planning predicament. Densification and development …
-
Living differently
… that supports centralised authorities who devise systems for living (eg: food supply, energy sources) that are not necessarily in keeping with sustainable processes. South Africa is facing a severe energy crisis and the current solution to this problem is to build more energy plants that are …
-
Design Process to Integrate Natural and Human Systems
… for recreation or development that ignores natural systems. "Most...landscape designers are still inspired by and primarily focused on aesthetics; society's other major objectives are secondary for them" (Richard Forman 2002, p: 85). In 1993, American Society of Landscape Architects defined …
-
Stormwater management and multipurpose infrastructure networks
In urban planning and design, natural systems are a key element of explorations about how to design for sustainability. As part of these efforts, academics and practitioners have also begun to explore the ways in which the utilization of natural systems can and should change our approach to the …
-
Integration of freestanding polyelectrolyte multilayer membranes in larger scale structures
… membranes are not only essential in natural systems (membranes of cells or organelles) but they are also important for applications (separation, filtering) in miniaturized devices. Membranes, integrated as diffusion barriers or filters in micron scale devices need to fulfill …
Page 1 of 15