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 19 of 19 for “"field experimentation"”.
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Population ecology and management of the invasive plant, Lespedeza cuneata
… this dissertation, I describe the combination of field experimentation, statistical modeling and spatially explicit computer simulations that I used to investigate the persistence and spread of an L. cuneata invasion in a native prairie site. Management treatments reduced local infestations, but …
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Performance investigation of a naturally driven building ventilation terminal.
… using Computational Fluid Dynamics (CFD) and far-field experimentation.An extensive literature review was carried out to provide the framework for this investigation. Building on existing (developed) research techniques, the knowledge gaps identified in this subject area, were isolated and …
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Flexural behavior of prestressed concrete monoblock crossties
… by ensuring designs are adequate for the field conditions that are encountered. Throughout the international railway community, many methods have been developed to analyze the flexural demand of concrete crossties. The current flexural analysis methodologies contained in American Railway …
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Field test program of the concrete crosstie and fastening system
… concrete crossties and fastening systems, field experimentation was performed at the Transportation Technology Center (TTC) in Pueblo, CO by researchers from the University of Illinois at Urbana-Champaign (UIUC). This paper focuses on the transfer of vertical and lateral loads through the …
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Multi-contact protocol-constrained collision avoidance for autonomous marine vehicles
The field of autonomous collision avoidance has continued to advance in many areas including sensory and perception, navigation, payload integration, and collision avoidance. The advances in collision avoidance, however, have largely focused on iterative changes to the velocity obstacle - an …
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Chemical treatment of corroding steel reinforcement after removal of chloride contaminated concrete
… for further evaluation in both large-scale and field experimentation.
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Simulation and assessment of highly altered hydrologic system responses to anthropogenic and natural stressors at the watershed scale
… for scenario-based analysis in lieu of actual field experimentation made it possible to assess the impacts of future climate and land use changes over the watershed responses. Although, the conceptualization of the physical processes representing the WMPs is challenging, the ability to create …
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Asymptotically optimal path planning and surface reconstruction for inspection
… structure of interest. Our work also involved field experimentation. We use off-the-shelf sensors and a robotic platform to scan marine structures above and below the waterline. Using such scanned data points, we reconstruct triangulated polyhedral surface models of marine structures based on …
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Roles of grasslands in sustainable improvement of land productivity in Bukoba District, Tanzania
… archival information on changing tenure systems; field experimentation and model development. Data were analysed for descriptive statistics, principal component analysis, ANOVA and modelling by SPSS, Conoco, GENSTAT and GAMS, respectively. Results established that customary tenure and land use …
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Crop Rotations for Sustainable Intensification
… systems. Through the integration of long-term field experimentation and transferable canopy monitoring approaches, it advances the mechanistic understanding of N dynamics and yield formation and provides a foundation for improving NUE in complex cropping systems.
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Modeling, Identification, and Control of an Unmanned Surface Vehicle
This dissertation addresses the modeling, identification, and control of an automated planing vessel. To provide motion models for trajectory generation and to enable model-based control design for trajectory tracking, several experimentally identified models are compared over a wide range of speed …
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Efficacy of indigenous pesticidal plants for tomato and brassica pest management in Malawi
… brassicae and Myzus persicae). The results on field surveys revealed that majority of smallholder farmers have considerable knowledge about pesticidal plants and reported Tephrosia vogelii, Vernonia amygdalina, Tithonia diversifolia and Azadirachta indica as particularly important. T. vogelii …
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Mechanistic analysis of concrete crosstie and fastening system using field-validated finite element model
… model based on laboratory experimentation, 4) validating the multiple crosstie model based on the field experimentation conducted on instrumented track, 5) validating the multiple crosstie model based on full-scale laboratory experimentation under asymmetric loading …
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Effect of Air Temperature, Vehicle Speed, and Pavement Surface Aging on Tire/Pavement Noise Measured with On-Board Sound Intensity Methodology
… first part of this thesis shows the results of field experimentation about the influence of external factors like air temperature and vehicle speed over the tire/pavement noise measured with the OBSI methodology. Temperatures from 40 to 90"F were targeted, and speeds from 35 mph to 60 mph (range …
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Coupled non-linear diffusion under periodic boundary conditions
… is reviewed in the areas of laboratory and field experimentation, computer simulation, and analytical and numerical approaches. The equations have been supposed analytically intractable for any generality of coupled flow. On the contrary, simulation indicates that a phenomenon of coupled …
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The effects of fertilisers, particularly foliar applied, on the potato plant's tolerance of attack by the potato cystnematodes, <i>Globodera rostochiensis</i> and <i>G. pallida</i>
… for the poor growth of PCN-infected plants. Field and glasshouse investigations showed contrasting effects of nutrients, especially foliar-applied, and nematicide applications, and highlighted the greater suitability of field experimentation for these types of investigation. The Diagnosis and …
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Cooperative communication and distributed detection in wireless sensor networks
… nodes can be positioned randomly over a given field with a high density; each node operates both like sensor (for collection of environmental data) as well as transceiver (for transmission of information to the data retrieval); the nodes have limited energy resources. The use of wireless …
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Distribution, population status and conservation of the samango monkey (Cercopithecus albogularis schwarzi) in the Limpopo Province, South Africa
… of two different canopy bridge designs through field experimentation and behavioural data collection for arboreal guenon roadkill mitigation. Analysis of actual roadkill data collected in the study area provided insights into the nature of high-risk localities. We showed that canopy overpasses …