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 363 for “"Ecological Systems"”.
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Modeling and Analysis of Interaction Networks in Ecological Systems
… This thesis explores network formation within ecological systems, focusing on herbivore-plant interaction networks using field data collected in Ecuador. Two modeling frameworks are considered: the repeated choice model (RCM) and the stochastic actor-oriented model (SAOM). The RCM treats …
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A socio-ecological systems perspective on planning for informality
… impact. Taking nullah-adjacent JJCs as a social-ecological system (SES), I conduct a mixed methods study, demonstrating that environmental planning for the river is interwoven with lack of sanitation and waste disposal infrastructure in drain-adjacent JJCs, that necessitates planning for …
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Network structure and stability criteria for complex ecological systems
… will persist in the face of these interactions. Ecological theory has demonstrated that when direct, pairwise interactions among a group of species are too numerous, or too strong, then the coexistence of these species will be unstable to any slight perturbation. The stability of these systems is …
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Synchronization via correlated noise and automatic control in ecological systems
… work is the possibility to synchronize nonlinear systems via correlated noise and automatic control. The thesis is divided into two parts. The first part is motivated by field studies on feral sheep populations on two islands of the St. Kilda archipelago, which revealed strong correlations due to …
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Tangled lines : Examining Western and Central Pacific Tuna Social-ecological Systems
… faced with complex and interlinked social and ecological challenges including high seas management issues, setting sustainable limits, climate change impacts, human rights violations, and illegal, unreported, and unregulated activities. At odds with this complexity, strong but narrow …
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Understanding community changes in ecological systems: a probabilistic and geometric perspective
Regulating and predicting community changes in ecological systems represent fundamental challenges in science and engineering, particularly in systems subject to constant environmental perturbations (e.g., natural, in vivo, and in situ environments). Consequently, a central goal of ecological …
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Assessing Climatic Hazards in Coastal Socio-Ecological Systems using Complex System Approaches
Coastal socio-ecological systems face unprecedented challenges due to climate change, with impacts encompassing long-term, chronic changes and short-term extreme events. These events will impact society in many ways and prompt human responses that are extremely challenging to predict. This …
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Positive and Negative Interactions in Economic and Ecological Systems: An Analogical Approach
The results of the statistical analyses were used to structure a simulation model that combines explained variation with randomized fluctuations. The simulation model demonstrates also the lack of dependency effects between the industries. Possible reasons for these findings are discussed along …
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Peer and school externalizing behaviors among early adolescents: an ecological systems analysis
The purpose of this study was to examine ecological level correlates of peer and school externalizing behaviors among early adolescents (ages 12-14). The current research addressed the following hypotheses for the direct effects: learning problems, poverty, and peer and school externalizing …
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Digital emulation of ecological systems: modeling a new approach for landscape architecture
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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Building voluntary sustainability : how urban design can promote care for ecological systems
… sustainably are intellectual understanding of ecosystems, engagement with ecosystems, and feedback on personal ecosystem impacts. Urban design is a key element in how the ecosystem is presented and culturally interpreted, and this thesis examines how urban design can be used to promote care for …
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Developing a learning progression for energy and causal reasoning in socio-ecological systems
… in their explanations of energy and socio-ecological events using both interview and written assessments.
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Social-ecological systems resilience in changing rural landscapes of the Midwestern United States
… of influence to deliberately affect social-ecological systems. Human and natural processes are interlinked, non-linear, and emergent. This dissertation has explored the application of resilience thinking to sense of place as a conceptual basis for envisioning ideal environmental management …
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Climate impacts and adaptation in the Dungeness crab fishery: a social-ecological systems perspective
… within and between coupled human and ecological communities. I first considered trophic-mediated climate risk to juvenile Dungeness crab, demonstrating the value of molecular diet analysis (“dDNA”) in understanding risk to, and potential adaptability of, marine species facing disrupted …
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A border of cloth: Ecological systems and critical spatial perspectives on the Islamic hijab
… from two theoretical points of view, namely ecological systems theory and critical spatial theory. Both theories are applied to argue that the ?ij?b should be interpreted holistically in the light of al-Isl?m as a religious and cultural system. It is a symbol with great personal significance …
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The Impacts of Biofuel Expansion on the Resilience of Social-Ecological Systems in Ethiopia
… as a disturbance to the resilience of social-ecological systems. Examining this issue through a resilience framework illustrates the dynamics of such systems, identifying potential trade-offs and regime shifts. Additionally, this research highlights the differentiated impacts for actors across …
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The Role of a Medical Family Therapist: An Ecological Systems Look at Pediatric Illness
… interviewed. Results were organized within the ecological systems framework (Bronfenbrenner, 1979) according to the various ways participants became a part of the family's illness experience. Participants identified roles directly with the family, with the health care team, and within the larger …
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Cavity-Based Approaches to Stochastic Dynamics on Sparse Graphs: From Ecological Systems to Epidemiological Inference
L'abstract è presente nell'allegato / the abstract is in the attachment
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Artificial Soil Formation And Stabilization Of Material Cycles In Closed Ecological Systems For Mars Habitats
<p>Scientists are increasingly pressured to investigate novel ways in which to feed astronauts for the first mission to Mars in the 2030s. It is the aim of this thesis to conduct a preliminary investigation for soil formation of NASA JSC Mars-1A Regolith Simulant in an environmentally closed …
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