Browsing Theses & Dissertations by Title
Now showing items 2285-2304 of 3346
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Numerical simulation of the structure of time dependent homogeneous, isotropic turbulence
(2009)We consider physical situation of homogeneous, isotropic decaying turbulence in an incompressible fluid for computational study. It is well established that laminar and turbulent flows of Newtonian fluids are governed ... -
Numerical simulations of on acoustic wave-guided inside a catheter
(2011-12)People with chronic diseases like cancer or renal failure have permanent catheters trough which drug are administrated or dialysis performed. These catheters can accumulate sediments and be obstructed. Replacing is a viable ... -
Numerical study of transport processes in the gas diffusion media of a fuel cell
(2009-12)Fuel cells, widely regarded as the 21st century energy-conversion devices, convert chemical energy directly into electricity with high energy density at low operating temperature, good performance operation, and high ... -
Numerical study of two-phase turbulent flow
(2008)In this thesis we calculate various Lagrangian correlation functions for fluid and particle velocities along the trajectories of the particles in two-phase turbulent flow cases. We consider the case of stationary ... -
Nutrient distribution across the insular shelf of La Parguera Puerto Rico: Assessment by algal tissue nitrogen
(2008)A survey was conducted to investigate possible presence of an inshore to shelf edge gradient in % nitrogen (%N) and stable nitrogen isotope ratio (δ15N; ‰ vs. air) in tissues of the rhodophyte Acanthophora spicifera and ... -
Nutrient release and grazing effects by two exotic Thiaridae snails on periphyton biomass under artificial conditions
(2018-05)Thiara (Tarebia) granifera and Melanoides tuberculata are invasive parthenogenetic snails that impact food webs in tropical freshwater systems. Due to their high reproductive rate, both snails dominate the community of ... -
Object recognition using spherical harmonics shape descriptor in hyperspectral imagery
(2011)Object recognition in hyperspectral and multispectral imagery has been studied in the last decade. The different approaches to recognition over hyperspectral images are based on spectral behavior, ignoring the shape behavior. ... -
Object segmentation in hyperspectral images using graph cuts based on active contours
(2010)The interest in object segmentation on hyperspectral images is increasing and many approaches have been proposed to deal with this area. In this project, we develop an algorithm that combines both the active contours and ... -
An object-oriented framework for hp-adaptive discontinuous galerkin methods
(2006)In this work, we consider second order elliptic problems arising in the modeling of single phase flows in porous media in 2D and in the analysis of transverse electromagnetic modes in wave guides using a discontinuous ... -
Object-oriented re-engineering of the nursing documentation system hpad
(2008)This document describes the process of improving the nursing documentation system, HPAD, by means of a software re-engineering process. The development of the re- engineered system required the study of the existing system ... -
Observation of enhanced Raman scattering as a result of coupling between localized plasmons and surface polariton waves associated with metal-semiconductor nanocomposites
(2011-05)We report the observation of enhanced Raman scattering as a result of the coupling between the localized surface plasmon (LSP) of metal nanoparticles (NP) and the surface plasmon polariton (SPP) associated with a thin metal ... -
Observation system for puerto rico coastal wave analysis
(2005)The National Weather Service in San Juan receives wave model output for the Puerto Rican regional coastal waters generated by WaveWatch III model of National Centers for Environmental Prediction (NCEP). These predictions ... -
Occurrence and characterization of Mn nodules in a Toposequence at Coloso valley agricultural reserve
(2010)Manganese (Mn) nodules are sedimentary rocks, generally spherical or irregularly round in shape with concentric layers formed from manganese and iron mineral precipitation. These are redoximorphic features in soils with ... -
Ocean circulation modeling of the San Juan bay
(2013)The Regional Ocean Modeling System has been implemented in the San Juan bay estuary, Puerto Rico, to investigate quantitatively the ocean currents at a harbor scale with tidal, wind and river forcing and to develop a ... -
Oceanomics: Shedding light on genome size reduction dynamics and global distribution of marine photosynthetic picoeukaryotes
(2020-05)Despite their reduced cell size (<3 μm), marine Photosynthetic Picoeukaryotes (PPEs) constitute a substantial part of the picophytoplankton biomass production in the open ocean. However, current knowledge about their ... -
Off the grid x-band radar node development for weather applications
(2010)The Student Led Test Bed (STB) is part of the NSF Engineering Research Center CASA and is currently focused on developing low infrastructure radar networks to fill lower atmosphere gaps not covered by current technology. ... -
Oil accumulation via Chlorella species using carbon sources from waste
(2009-12)One of the global issues acquiring significant attention these days is related to energy supply and demand. The irreversible decrease of fossil fuels left to supply energy and the greenhouse gases increase in the atmosphere ... -
On applications of rough sets theory to knowledge discovery
(2007)Knowledge Discovery in Databases (KDD) is the nontrivial extraction of implicit, previously unknown and potentially useful information from data. Data preprocessing is a step of the KDD process that reduces the complexity ... -
On chip solar energy harvesting system using substrate diode pv cell and fractional open circuit age implementation
(2018)The technological community is highly focused in the area of solar energy harvesting. Specifically, these efforts can be observed in the design of more efficient power management systems which can extract the maximum ...