Theoretical Aspects of Nanoparticle Electric Propulsion

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76886/1/AIAA-2006-4335-432.pd

Experimental Results and Modeling Advances in the Study of the Nanoparticle Field Extraction Thruster

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76588/1/AIAA-2007-5254-110.pd

Nanoparticle Electric Propulsion: Experimental Results

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76874/1/AIAA-2006-4803-539.pd

Nanoparticle Field Extraction Thruster (nanoFET): Introduction to, Analysis of, and Experimental Results from the No Liquid Design Option

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77224/1/AIAA-2008-5097-170.pd

Assessment of newly developed tongue sulfide probe for detecting oral malodor

Aim: The present study examined the relationship between sulfide levels on tongue dorsum surfaces (pS levels) and oral malodor. Method: The pS levels of 20 systemically healthy volunteers were evaluated using an industrial device equipped with a newly-developed tongue sulfide probe. The pS levels on 3 parts of the tongue – anterior, middle and posterior along the median groove of the tongue dorsum – were determined for each subject. Results: The device reported the pS level in a digital score ranging from 0.0 (<10 −7 M of sulfide) to 5.0 (ges;10 −2 M of sulfide) in increments of 0.5. Oral malodor was assessed by measuring the level of volatile sulfur compounds in mouth air, as well as by the organoleptic method. The pS levels were 0.03±0.11, 0.20±0.41 and 0.88±0.76 for the anterior, middle and posterior parts, respectively. This difference was significant ( p <0.001). Both oral malodor measurements showed significant correlation ( p <0.05) with the pS levels of middle and posterior parts of tongue. Conclusion: It was concluded that the tongue sulfide probe might be useful in management of subjects with oral malodor.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75342/1/j.1600-051x.2001.028005494.x.pd

Developmental Progress of the Nanoparticle Field Extraction Thruster

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76891/1/AIAA-2008-5096-799.pd

Microstructure-sensitive estimation of small fatigue crack growth in bridge steel welds

A probabilistic finite element model is implemented to estimate microstructurally small fatigue crack growth in bridge steel welds. Simulations are based on a microstructure-sensitive crystal plasticity model to quantify fatigue indicator parameters (FIPs) at the slip system level and a fatigue model that relates FIPs to fatigue lives of individual grains. Microstructures from three weld zones, namely, fusion zone (FZ), heat affected zone (HAZ), and base metal (BM), are constructed based on their microstructural attributes such as grain morphology, size, and orientation. Statistical volume elements (SVEs) are generated and meshed independently for the three welding zones. Each grain within the SVEs is divided into several slip bands parallel to crystallographic planes. During the loading process, cracks nucleate at the slip bands (SBs) with the largest FIP next to the free surface. The crack extension path is assumed to be transgranular along SBs and the number of cycles required to crack the neighbor grain is calculated by the corresponding FIP-based crack growth rate equation. The simulation process is carried out using ABAQUS with a user defined subroutine UMAT for crystal plasticity. After the calibration of the constitutive model and irreversibility parameters, numerical simulations for small crack growth in three zones are presented. The crack length vs. the predicted fatigue resistance shows significant differences in the mean values and variability among the three weld zones