Now showing items 921-930 of 950
Understanding the Importance of an Energy Crisis.
(2009)
Human development and energy, in general, and electrical energy, specifically, co-exist seamlessly in high HDI countries where reliability and availability is greater than 99%. In numerous low HDI countries, there is 2-50% ...
Electron Field Emission from Boron Nitride Thin Films.
(2008)
A systematic study of electron field emission from boron nitride thin films is presented, establishing nanostructured thin film cubic boron nitride (cBN) as a robust and chemically inert material with a low effective ...
Optical and Magnetic Manipulation of Hybrid Micro and Nanoparticle Sensors.
(2008)
Microparticles and nanoparticles have been used in a wide variety of applications ranging from biomedical to optical and electronic technologies. The microscopic and mesoscopic size scale of single particles makes them ...
A Building Block Approach Towards Novel Nonlinear Optical Materials.
(2007)
The purpose of the present research is to develop and apply a building block approach towards the design of novel nonlinear optical materials, capable of exhibiting enhanced Two-Photon Absorption (TPA) behavior. These ...
Few-Cycle and Sub-Cycle Metrology for the Characterization of High Harmonics.
(2009)
The rapid advances in the generation of ultra-short optical pulses in recent decades have often outstripped the ability of metrologists to accurately measure the pulses' temporal profiles. With each reduction in pulse ...
Pore Characterization of Ultralow-k Dielectric Thin Films Using Positronium Annihilation Spectroscopy.
(2008)
In this thesis, a series of nanoporous ultralow dielectric constant (ULK) thin films fabricated using spin-coating and sacrificial pore generators (degradable porogens embedded in a host matrix) were studied as a function ...
Electron Transport in Hall Thrusters
(2012)
Despite high technological maturity and a long flight heritage, computer models of Hall thrusters remain dependent on empirical inputs and a large part of thruster development to date has been heavily experimental in nature. ...
Full-wave Nonlinear Inverse Scattering for Acoustic and Electromagnetic Breast Imaging.
(2012)
Acoustic and electromagnetic full-wave nonlinear inverse scattering techniques are explored in both theory and experiment with the ultimate aim of noninvasively mapping the material properties of the breast. There is ...
Exploring the Mechanics of Transcriptional Control through DNA Looping with Optical Tweezers.
(2010)
The interior of a cell is a crowded and constantly fluctuating environment, where DNA and other biomolecules are highly constrained and subject to various kinds of me-chanical forces. To unravel the role of mechanics in ...
An Experimental Investigation of Reacting and Nonreacting Coaxial Jet Mixing in a Laboratory Rocket Engine.
(2009)
Coaxial jets are commonly used as injectors in propulsion and combustion devices due to both the simplicity of their geometry and the rapid mixing they provide. In liquid rocket engines it is common to use coaxial jets in ...