Now showing items 5494-5513 of 8482

• Polymer formation, deactivation, and ethylene selectivity decline in palladium/aluminum oxide catalyzed selective acetylene hydrogenation ﻿

(1989)
The removal of acetylene by selective hydrogenation is a critical step in the purification of ethylene streams for industrial polyethylene production. Hydrogenation of 0.35-1.0% acetylene in ethylene over Pd/Al$\sb2$O$\sb3$ ...
• Polymer nanocomposites characterization by a stochastic finite elements representation ﻿

(2007)
This dissertation introduces a new multiscale stochastic finite element method (MSFEM) for determining the mechanical properties of polymer nanocomposites (PNC) consisting of polymers reinforced with single-wall carbon ...
• Polymer-Based Approaches to Bone Tissue Repair and Regeneration ﻿

(2014-04-03)
The loss or damage of bone tissue due to trauma or surgical resection remains a significant clinical challenge. Limitations associated with the current gold standard of care, autografting, include donor site morbidity and ...
• Polymer/Extracellular Matrix Composite Scaffolds for Articular Cartilage Regeneration ﻿

(2013-08-20)
Cartilage is highly dependent on its extracellular matrix (ECM) for many of its vital characteristics such as a low friction surface, high compressive strength, and force distribution. Unfortunately, articular cartilage ...
• Polymeric delivery of inhibitors of smooth muscle cell proliferation ﻿

(1998)
Restenosis, currently estimated to occur in 30-50% of dilated lesions, continues to be a major limitation to the success of current interventional cardiovascular procedures. Presently, no established therapy prevents or ...
• Polymorphism of microsatellites in coding regions of Dictyostelium discoideum ﻿

(2005)
Microsatellites are repetitive DNA sequences with high rate of slippage mutations, which cause changes in length. As expected by the neutral theory of molecular evolution the level of polymorphism of these sequences is ...
• Polysulfone ultrafiltration membranes impregnated with silver nanoparticles show improved biofouling resistance and virus removal ﻿

(2009)
Biofouling and virus penetration are two significant obstacles in water treatment membrane filtration. Biofouling reduces membrane permeability, increases energy costs, and decreases the lifetime of membranes. In order to ...
• Polytectic ﻿

(1997)
In the fragmented, polymorphous world we presently inhabit, is synthesis applicable or even relevant? The conflict, tension, and struggle inherent in the attempts at reconciliation between architectural theory and architectural ...
• POPULATION BALANCE ANALYSIS OF SHEAR-INDUCED PLATELET AGGREGATION ﻿

(1984)
The work herein examines in vitro platelet aggregation in response to fluid shearing motion. Our specific aim is to characterize shear-induced aggregation by means of kinetic measurements. In doing so we consider plausible ...
• Population dynamics of tetrachloroethene dechlorinating consortia for surfactant and bioaugmentation remediation applications ﻿

(2007)
Three anaerobic, dechlorinating consortia were enriched from different origins using methanol and tetrachloroethene (PCE) and maintained for approximately three years. Characterization of the consortia with terminal ...
• Population Regulomics: Applying population genetics to the cis-regulome ﻿

(2014-02-24)
Population genetics provides a mathematical and computational framework for understanding and modeling evolutionary processes, and so it is vital for the investigation of biological systems. In its current state, molecular ...
• Pore-Scale Controls on Permeability, Fluid Flow, and Methane Hydrate Distribution in Fine-Grained Sediments ﻿

(2011)
Permeability in fine-grained sediments is governed by the surface area exposed to fluid flow and tortuosity of the pore network. I modify an existing technique of computing permeability from nuclear magnetic resonance (NMR) ...
• Porous Autonomous ﻿

(2013-07-10)
Porosity is program, circulation, light, views, scale, occupation. Autonomy is sculpture, logic, container, shelter, indifference. The contemporary public institution must be porous and autonomous. While this goal has never ...

(1970)
• Portable high performance and scalability of partitioned global address space languages ﻿

(2007)
Large scale parallel simulations are fundamental tools for engineers and scientists. Consequently, it is critical to develop both programming models and tools that enhance development time productivity, enable harnessing ...
• Portable mid-infrared gas sensors: Development and applications ﻿

(2001)
Several novel compact architectures of diode laser based absorption gas sensors have been developed, characterized and applied to real world applications. The motivation for this research has been the need to develop highly ...

(1970)
• Pose Estimation With Low-Resolution Bearing-Only Sensors ﻿

(2012)
Pose estimation of neighboring robots is a key requirement for configuration control behaviors in multi-robot systems. Estimating pose is difficult without system constraints, it is even more challenging when using ...
• Positive Lyapunov exponent for ergodic Schrodinger operators ﻿

(2010)
The discrete Schrodinger equation describes the behavior of a 1-dimensional quantum particle in a disordered medium. The Lyapunov exponent L( E) describes the exponential behavior of solutions at an energy E. Positivity ...
• Positron survival in type II supernovae ﻿

(1990)
In this work I investigate the possibility of Type II supernovae being the origin for positrons producing observed annihilation radiation observed toward the Galactic center. It was my contention that the decay of $\sp{56}$Co ...