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 91 for “"Diffusion Theory"”.
-
Exact and Approximated Green's Functions for Neutron Diffusion Theory
Made available in DSpace on 2017-07-06T18:58:57Z (GMT). No. of bitstreams: 3 Streibich_Matthew_W_MS.pdf: 14579807 bytes, checksum: 90defe5c6cf869d03ef95f79ed0a4455 (MD5) Streibich_Matthew_W_MS_ABS.pdf: 542939 bytes, checksum: f6101bccc7d73b530bbfaf98aef882c3 (MD5) license.txt: 4813 bytes, checksum: …
-
A nonlinear diffusion theory model for xenon-induced flux oscillations
… of weighted residuals applied to multigroup diffusion theory. A similar linear model is developed by the same methods in order to consider the effects of the nonlinearities of the system. The effects of multi- and single-energy group considerations are also examined. Finally, the effects of …
-
Experimental characterization of a coupled deformation-diffusion theory for elastomeric materials
… to fully characterize a coupled deformation-diffusion theory. Free swelling experiments, transient swelling force measurements, and an analysis of the swollen geometry of a PDMS bilayer strip were performed, and compared to numerical simulations. The experimental results and numerical …
-
Leadership Products As Innovations In The Context Of Rogers' Diffusion Theory
… when framed in the context of Rogers’ diffusion-of-innovation theory. Thus, the products’ respective dissemination patterns were compared and contrasted-- quantitatively through purchase numbers, and qualitatively through opinions and events recollected by early users. The case-study …
-
Coupled Elastic-Plastic Thermomechanically Assisted Diffusion: Theory Development, Numerical Implementation, and Application
A fully coupled thermomechanical diffusion theory describing the thermal and mechanically assisted mass transport of dilute mobile constituents in an elastic solid is extended to include the effects of elastic-plastic deformation. Using the principles of modern continuum mechanics and classical …
-
Computational Modeling of Osmotically Assisted Membrane Separations with Multicomponent Solution-diffusion Theory
… separation is achieved due to the solution-diffusion mechanism, which results from the combination of selective species partitioning and the relative diffusive rates within the membrane matrix. To model membrane separations involving multicomponent mixtures, the transport equations are …
-
Comparisons of Transport and Diffusion Theory Calculations of Performancecharacteristics for Large Fast Reactors
Made available in DSpace on 2014-12-11T17:26:01Z (GMT). No. of bitstreams: 1 7105217.pdf: 5163120 bytes, checksum: d6b149182da08b0eaafee8cb4aae9f1d (MD5) Previous issue date: 1970
-
MITR-II fuel management, core depletion, and analysis : codes developed for the diffusion theory program CITATION
Thesis (Nucl.E.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1979.
-
An analytical study of members of a horizontal women's professional and managerial network as related to diffusion theory
… to build a profile of women who belonged. Using diffusion theory of social network analysis as a theoretical framework, the research attempted to determine whether the networking process contributed to the career development and personal development of the women involved.Findings indicated a …
-
Cross section generation strategy for high conversion light water reactors
… few-group macroscopic cross sections for neutron diffusion theory analyses of this type of reactor, in order to enable three-dimensional transient simulations. The goal is to minimize the number of energy groups in these simulations to reduce computational effort. A two-dimensional cross section …
-
A Method for Characterizing the Properties of Industrial Foams
… foam layer has been developed using diffusion theory. Measurements predicted by diffusion theory were compared to results generated using Monte Carlo methods for a variety of foam layer properties in both the time-domain and the frequency-domain. The properties that were varied …
-
The self-consistent simulation of carrier transport and its effect on the modulation response in semiconductor quantum well lasers
… bulk regions of the device is modeled with drift-diffusion theory, and carrier fluxes at abrupt heterojunctions are treated with ballistic transport derived from thermionic emission theory. In addition, the first treatment of carrier capture in a quantum well laser simulator is presented, and a …
-
PREDICTORS OF THE SUSTAINED IMPLEMENTATION OF THE SCHOOL-WIDE POSITIVE BEHAVIOR INTERVENTION SUPPORT MODEL
… successful implementation. Informed by Rogers’ diffusion theory, this study examined factors that may influence the sustained implementation of the SWPBIS. These factors are relative advantage, compatibility, complexity, trialibility, and observability. Results of this study indicated that the …
-
On the Theory of Stress-Assisted Diffusion
… of a recently developed stress-assisted diffusion theory are obtained. General transient solutions are obtained analytically for certain classes of stress distributions. For general stress distributions a perturbation method is employed to produce transient solutions. Under appropriate …
-
The Asymptotic Development of The Equations of Nuclear Reactor Theory
The solutions to various forms of the diffusion equation are shown to correspond to the leading term of an asymptotic expansion of the solution to the neutron transport equation for large near-homogeneous systems which are close to critical. The product of the fundamental unit-cell transport theory …
-
Transport-theory-equivalent diffusion coefficients for node-homogenized neutron diffusion problems in CANDU lattices
… performed customarily using two-energy-group diffusion theory (no angular dependence) for a node-homogenized reactor model. The work presented here is concerned with reducing the loss in accuracy entailed when going from Transport to Diffusion. To this end a new method of calculating the …
-
Modeling of controlled-release drug delivery from autocatalytically degrading polymer microspheres
… diffusivity of the drug. A mechanistic reaction-diffusion model with pore evolution coupled to hydrolysis and related to the effective diffusivity through hindered diffusion theory is proposed. Experimental background motivating the attention to the size-dependent effects of autocatalysis on drug …
-
An exploratory study of the diffusion of instructional computing innovation among social work faculty
… computers as instructional tools. Rogers' (1983) Diffusion Theory was used to identify variables hypothesized to be correlated with the innovational adoption process. The findings suggested that the innovational attributes of trialability (r =.459, $p<.001$) and observability (r =.363, $p<.001$) …
-
Uncovering and avoiding failure modes in driveline and tire/wheel NVH using a computational meta-model
… countermeasures.Using insights from innovation diffusion theory, the process and tool were deployed systematically to NVH community, with user insights used to adapt and improve the process and tools. Based on this work, a strategy is introduced for the development and adoption of a failure mode …
Page 1 of 5