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 54 for “"transport capacity"”.
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Characterizing channel migration habits, sediment-transport capacity and flow dynamics in peatlands: an example from Cedar Creek, Minnesota U.S.A.
… carbon cycle as the terrestrial carbon storage capacity of these environments may store the equivalent of two-thirds, if not more, of atmospheric carbon. Of particular importance to the carbon flux and storage capacity of a peatland are the hydrologic conditions and morphodynamics of fluvial …
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Design and Analysis of Wireless Networks: Connectivity, Coverage, and Capacity
… communications, influences the scaling of the transport capacity of wireless networks. The transport capacity is the supremum of the sum of distance-rate product over all source destination pairs. Our results show that in the high attenuation regime when the absorption constant of the medium is …
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Buildup/Washoff Model for Dissolved Iron in Stormwater Runoff
… was selected to estimate the pollutant transport capacity. In a further step the two were combined. The derived Buildup/Washoff model was calibrated for the collected data and precipitation data of the International Airport of New Orleans. The obtained power function for pollutant …
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WFP supply chain capacity in Ethiopia : an analysis of its sufficiency, constraints & impact
The WFP's transport of food aid to Ethiopia's landlocked population is constrained by supply chain bottlenecks at the port, and limited availability of trucks for inland transport. How can the WFP supply chain be optimized to effectively operate within the given constraints? First, we assess …
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Fractional transport of bed-material load in sand-bed channels
… presents a new method for predicting fractional transport rates of bedmaterial load in sand-bed channels. The proposed method is developed based on the concept of the transport capacity fraction (TCF) approach. The bed-material concentration for a given size fraction is obtained by weighting the …
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Understanding Performance Limits in Wireless Sensor Networks
Finally, we study the minimum energy required for transporting packets between two arbitrarily chosen source and destination in a random wireless network. We prove both an upper bound and a lower bound of the minimum transporting energy. We also show several results of network transport capacity …
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The influence of low moisture stress on the gas exchange and thylakoid activity of loblolly pine (pinus taeda) and aleppo pine (pinus halepensis)
… characteristics, uncoupled thylakoid electron transport capacity, and needle osmotic potentials were measured. Seedlings of both species were watered only when their needle water potential fell below -1.8 and -2.2 MPa respectively (water stress conditioning) or were kept well watered …
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Butyrate-induced upregulation of intestinal glucose transport and signaling pathways represent a possible nutrient therapy for individuals with malabsorptive disorders
… Interventions aimed at increasing intestinal transport capacity may mitigate the negative consequences of a damaged intestine, and reduce the need or intensity of costly supportive therapies. Attaining nutrients is a careful orchestration of diet, digestion, and absorption. In a typical …
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Capacities of erasure networks
… investigated, in various multiple senses, the “capacity” of several models of erasure networks. The defining characteristic of a memoryless erasure network is that each channel between any two nodes is an independent erasure channel. The models that we explore differ in the absence or presence …
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Areal Modeling of Erosion for Environmental Nonpoint Applications (AMEENA)
… on a watershed scale by predicting erosion and transport over the landscape surface. Erosion is predicted based on the Revised Universal Soil Loss Equation (RUSLE), and sediment transport capacity is estimated as a function of upslope flow volume, local gradient, and land use. Gross erosion is …
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Three-Dimensional Numerical Modeling Of Multiple-Sized Sediment Transport Modeling Under Current And Waves
… numerical model of multiple-sized sediment transport under current and waves is developed. The coastal circulations are described by a three-dimensional hydrodynamic model, which is governed by the three-dimensional phase-averaged shallow water flow equations coupled with wave radiation …
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Oxygen Transport in the Human Placenta: A Multi-Physics Modelling Approach
… (FEA), were combined to study the oxygen transport mechanism in the human placenta and its relationship to placental structure. Initial research relates to the development of a platform suitable for realistic computational simulations. The work shows how the 3D architecture of a terminal …
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The intraorgan lymphatic system of the rat left ventricle in normalcy and aging
… in the accepted visible macromolecular transport pathways. Lymphatic vessels were found in both epicardial and myocardial areas. No endocardial lymphatics were found. Both intercellular and transendothelial visible macromolecular transport pathways were examined in 3, 6, 12, 18, and 28 …
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Hydraulic Performance of Porous Sediment Control Structures
… One is based on the variation of sediment transport capacity, while the other is based on the concept of the potential fall depth.
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Assimilatory sulfur metabolism in marine microorganisms
… study consisted of four parts: (1) The sulfate transport systems of two nutritionally different marine bacteria, Pseudomonas halodurans and Alteromonas luteo-violaceus, were characterized to provide information on environmental regulation of sulfate transport capacity. In common with terrestrial …
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Sediment transport modelling at the catchment scale in Alpine streams
… Also, artificial reservoirs may reduce their capacity to provide water in the quantity and time needed for the productive uses they were built, like irrigation and hydropower. In the last sixty years for example, dam-regulated rivers in Europe have witnessed a loss of reservoir capacity due to …
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Investigação de efeitos de escoamento 3D e de ondas de vento na aplicação de um modelo de transporte de sedimentos
Most of the sediment transport formulas is parameterized in terms of a bottom shear stress defined from vertical velocities (2DH). In the usual calculation, is assumed that the direction of sediment transport follows the vector velocity 2DH, (Meyer-Peter and Müller (1948), Engelund and Hansen …
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On the Scalability of Ad Hoc Dynamic Spectrum Access Networks
… performance, which we define in terms of network transport capacity and end-to-end throughput per node, as the network density increases. We develop an analytical procedure for performance evaluation of ad hoc DSA networks using Markov models, and analyze the performance of a DSA network with one …
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The effect of changing topological constraints on poleward ocean heat transport induced by plate tectonics over the last 600 million years
… on the oceans may affect their ability to transport heat poleward and change the equilibrium pole-equator temperature of Earth. An ocean model was run for three simple continental geometries to determine the effect of land distribution on the heat transport capacity and pole-equator …
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Morphodynamics of multi-thread rivers Theory and Observations of Channel Loops
… asymmetry is associated with an increase of the transport capacity in the narrower dominated channel. Finally, the stability threshold of the observed bifurcation is computed for each observed bifurcation, showing that the bifurcation planform notably affects the stability of the configuration in …
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