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 430 for “"Size distributions"”.
-
Statistical Inverse Modelling of Aerosol Size Distributions
… inversion approach to estimating the aerosol size distribution and aerosol dynamical parameters from aerosol observations. Specifically, we consider the state space framework to simultaneously estimate and quantify the uncertainty of the size distribution, condensation, deposition, and …
-
Particle size distributions and stability of aqueous aerosols.
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1975
-
The Role of Collection in Determining Raindrop Size Distributions
Made available in DSpace on 2014-12-08T22:24:36Z (GMT). No. of bitstreams: 1 7000775.pdf: 1524556 bytes, checksum: b5df7774702164b69db542947a5ac5ec (MD5) Previous issue date: 1969
-
Grain size distributions of various materials in an abrasion mill
Wet abrasion of sand-sized quartz and orthoclase in polyethylene bottles for 912 hours showed that abrasion of fine material is practically negligible, in agreement with Kuenen (1959). The size distributions of the sand. sized quartz and orthoclase remained unchanged. The size distributions of …
-
Marine particle dynamics : sinking velocities, size distributions, fluxes, and microbial degradation rates
… the determination of the particle concentration size distribution at high spatial, depth, and temporal resolutions. Drifting sediment traps were also deployed to assess both the bulk particle flux and determine the size distribution of the particle flux via image analysis of particles collected …
-
Assessing fall velocity-maximum dimension relationships and particle size distributions for snowfall
… velocity and maximum dimension and the particle size distributions of snowflakes from many snowfall events were analyzed. Observed relationships between fall velocity and maximum dimension were compared with previously derived relationships, and it was found that, in most cases, no single curve …
-
Control of Micro- and Nano-Sphere Size Distributions: Implications in Drug Delivery
Finally, as an extension of our acoustic excitation technique, we developed a method for fabricating uniform microcapsules exhibiting controlled shell thickness. The addition of a second concentric nozzle to our system allowed us to spray a dual polymer jet. Considering the interfacial tensions and …
-
The kinetic and equilibrium cluster size distributions of finite bond aggregation processes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
-
Marine particle dynamics : sinking velocities, size distributions, fluxes, and microbial degradation rates
… the determination of the particle concentration size distribution at high spatial, depth, and temporal resolutions. Drifting sediment traps were also deployed to assess both the bulk particle flux and determine the size distribution of the particle flux via image analysis of particles collected …
-
The consequences and implications of ecology on body size distributions in social insects
… success and survival of an organism (e.g. size at birth, age at maturity, and size at maturity). One of the major tenets of life history theory is that finite resources must be allocated to the development of traits associated with growth, defense, and reproduction. Consequently, investment …
-
Real-time Analysis of Aerosol Size Distributions with the Fast Integrated Mobility Spectrometer (FIMS)
<p>The Fast Integrated Mobility Spectrometer (FIMS) has emerged as an innovative instrument in the aerosol science domain. It employs a spatially varying electric field to separate charged aerosol particles by their electrical mobilities. These separated particles are then enlarged through vapor …
-
Modelling of Rainfall Drop Size Distributions for Application in Fade Prediction on Earth-Space Paths
… measurement of rain rate and rainfall drop size distribution (DSD) at the earth station location. <br/><br/>This thesis fits the standard lognormal and gamma distributions to one-minute slices of rainfall DSDs captured between 2003 and 2013 at the Chilbolton Observatory in southern England. …
-
Influence of environmental parameters on atmospheric aerosol size distributions in a South African coastal zone
… of aerosol properties (concentrations, sizes, and types) at the coastal location of Simon's Town in False Bay, to characterize these properties for the first time in a coastal region of South Africa. The study site provides the opportunity to measure these aerosol properties in pristine …
-
Experimental and theoretical studies of phase transitions and micellar size distributions in ternary surfactant systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
-
Size distributions, population dynamics, and single-cell properties of marine plankton in diverse nutrient environments
… and nutrient availability. To this end, size spectra of microbes were studied over a range of nutrient regimes, both natural and manipulated. Three transects in the Atlantic provided a natural range of nutrient environments, especially because they captured seasonal variations. The …
-
A balloon-borne telemetering device for the measurement of raindrop-size distributions in the vertical.
Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1965. M.S.
-
Evaluations of microphysical parameterizations in retrieval algorithms for snowfall particle size distributions from dual frequency radar measurements
… to constrain the shapes of snowflake particle size distributions. Previous algorithms that have been proposed for dual frequency retrievals assume that snowflakes have a constant density, scatter as homogeneous particles, and have an exponential size distribution. These assumptions disagree …
-
Use of artificial neural network models to derive particle size distributions and their moments from chord length distributions
… a method for in-lie measurement of a particle size distribution (PSD) of suspended solids and its moments. This was part of a wider study, the aim of which was to develop a system for controlling a crystallisation process. The control strategy to be used is dependent on kinetic models of the …
Page 1 of 22