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 28 for “"Macroscopic model"”.
-
The Argument Underlying a Macroscopic Model for The Analysis of Protocols of Students' Thoughts
… distinguishing characteristics of three sorts of macroscopic cognitive framework into which attributive conceptual elements are integrated by the human mind.
-
A Macroscopic Model for Evaluating the Impact of Emergency Vehicle Signla Preemption on Traffic
… done using field studies. None of the simulation models that are currently commercially available have the capability to model the presence of EVs and simulate the traffic dynamics of the vehicles surrounding them. This study presents a macroscopic traffic model for examining the effect of signal …
-
A continuum theory with long-range forces for solids
… require special treatment. Furthermore, as the model loses "local stiffness", the resistance to the formation of discontinuities is reduced. The theory can be viewed in two ways: It is a multi-scale model in that it can be applied simultaneously on the atomistic level and on the macroscopic …
-
Rational construction by molecular dynamics modeling and simulations of porous adsorbent media for bioseparation
… developed that uses the molecular dynamics (MD) modeling and simulation approach to rationally design, construct, and characterize polymeric porous adsorbent media and study the transport and adsorption of a charged biomolecule (desmopressin) in a representative adsorbent medium. The MD results …
-
Model predictive control of timed continuous petri nets
… of timed continuous Petri nets. The theory of Model Predictive Control (MPC) is first discussed. Then continuous Petri nets (PN) are introduced as a powerful tool for modelling, simulation and analysis of discrete event/continuous systems. Their useful capabilities are studied. Finally, a …
-
Multiscale modeling of chemical vapor deposition and plasma etching
In this work, a framework and a set of modeling tools capable of describing systems with key processes occurring on widely separated length and time scales has been developed. The major focus of this work is linking atomistic and continuum descriptions of gas phase transport. This problem is of …
-
Transport in lattice fracture networks : concentration mean and variance
… Our goal is to develop an exact effective macroscopic model for the concentration mean and variance from the microscopic disorder model. Within a Lagrangian transport framework, we derive effective equations for particle transport by coarse graining and ensemble averaging of the local scale …
-
Heat capacity of gadolinium near the Curie point
… region, fits an expression derived from a simple macroscopic model of rounding. The Tc specified by this fit makes alpha = -.09 +/- .05 and alpha = -.32 +/- .05. Our results on Curie point and rounding are in disagreement with recent conjectures of Cadieu and Douglass for gadoliniumo"
-
Counterbending in a flagellum macromodel
… engineering theories. This study created a macroscopic model of the flagellum which allowed deeper exploration of these phenomena. Analysis of material properties and experiments were used to verify the accuracy of the proposed model.
-
Modelling road space prioritisation for public transport using AIMSUN: a case study in Durban
… of road space prioritisation and aspects of modelling this. These types of systems were then modelled using a case study of a single corridor in Durban, South Africa. Both a macroscopic modelling and microscopic modelling package were used to model a base year and various public transport …
-
Molecular dynamics studies of the interactions of low energy particles and clusters with surfaces
… extended to higher energy irradiations using a macroscopic model derived in this work and shown to have enormous significance for studies of radiation damage and ion beam modifications of materials. The simulations also provide new insight into the question of ""non-linear"" or thermal spike …
-
On the mechanics of 2-dimensional carbon allotropes
… and mechanics of a microscopic system in a macroscopic model domain, by maintaining the chosen molecular properties across a multitude of length scales, from the nanoscale to the continuum scale. The process demonstrates how it becomes possible to 'protoype a model', as category theory …
-
Homogenization of a Cracked Poroelastic Medium - Numerical calculation of the coefficients and damage
… order to get the coe cients for an homogeneous macroscopic model starting from heterogeneous microscopic description. The particular problem of this project is a cracked poroelastic medium, that is a Biot-type problem both in the grains and in the cracks. In order to solve the expanded problem …
-
Experiments in fluid spreading in the partial wetting regime
… on partial wetting flows has revealed that the macroscopic behavior is impacted by microscopic behavior, but there is no broadly accepted model that connects these two regions. Some experimental data exist for a small volume of partial wetting fluid spreading, but there is a distinct gap in data …
-
A multiscale analysis of heat transfer in porous media
The modeling of thermal convection in porous media is a challenging task due to the inherent structural and thermophysical heterogeneities that permeate over several scales. In the present thesis, I address several issues relevant to buoyancy-driven thermal convection in porous media. The central …
-
Fracture and toughening of soft elastic composite
… proposed for soft elastic foams. A phase-field model for the fracture processes in soft elastic structures is further developed to study the crack propagation in an elastic foam, and results have all achieved good agreement with the scaling law. Simulations have shown that an effective fracture …
-
Flow through porous media : from mixing of fluids to triggering of earthquakes
… numerical simulations, we derive a macroscopic model of mixing that captures the delicate interplay between channeling of less viscous fluid and creation of interfacial area as a result of viscous fingering. The coupling between subsurface flow and geomechanical deformation is …
-
A bi-level system dynamics modeling framework to evaluate costs and benefits of implementing Controller Pilot Data Link Communications and Decision Support Tools in a non-integrated and integrated scenario
A modeling framework to evaluate the costs and benefits of implementation of Controller Pilot Data Link Communication (CPDLC), and Air Traffic Management (ATM) decision support tools is proposed in this paper. The benefit/cost evaluation is carried out for four key alternatives namely alternative …
-
A system dynamics model for the development of China's air transportation system
… efficient results through systems thinking. This model could be used to communicate relevant information to the decision makers in a readily understandable and useful form and in a timely fashion. Two models are developed in this thesis: 1) A macroscopic China's Socio-economic Development Model …
-
A thermogravimetric study of oxygen diffusion in YBa2Cu3O7-d
… out. This work includes the development of a macroscopic model for oxygen diffusion in YBCO based on the diffusion coefficient calculated from experimental data. The model is used to simulate for the first time oxygenations under both isothermal and non-isothermal conditions. The study of …
Page 1 of 2