Digital Commons Network^™

Technological Innovation: An Option In The Ms In Technology Program, James R. Gray

Teaching Entrepreneurship to Engineering Students

The Technological Innovation (TI) option of the Masters of Science in Technology program emphasizes the research, development and technical management of the technological innovation process within the technology-based organization. It is structured to aid the industrial and engineering professional that is responsible for the design and development of technical processes and products. This option includes the technical management of innovation processes, research and development, information technologies, and process technologies. Participants in this option come from a wide range of technological disciplines and draw on an extensive array of theoretical and applied knowledge. This paper presents the development and implementation of …

Tools And Metrics For Evaluating Modular Product Concepts Based On Strategic Objectives, Matthew Bailey Strong

Theses and Dissertations

The design of modular products has recently become the focus of significant research in the area of design theory and methodology. This focus is the result of increased awareness of the potential power of modularity to achieve certain product objectives. However, there continues to be a gap between the results of academic research and industrial application. The refinement, consolidation, and extension of this academic research would help design teams who are charged with developing modular products to use these academic findings in real world, industrial applications. The research presented in this document focuses on developing design tools, based on past …

Ultrasonic Technique For Investigation Of The Effect Of Grid-Generated Turbulence On Sound Wave Propagation, Tatiana A. Andreeva, William W. Durgin

Office of the Provost Scholarship

This paper concerns an experimental study of the effects of the grid-generated turbulence on the propagation of acoustical waves in a wind tunnel. Turbulence effects are investigated using ultrasound time-of-flight method, employing counter-propagating ultrasonic pulses. Turbulence effects are an important source of error in the active probing of the atmosphere using sound sources. The emphasis is on the propagation time fluctuations and their interpretation using theoretical analysis of Kolmogorov.

Winter/Spring 2003, 90.9 Wmpg Fm

WMPG Program Guides

Newspaper format

Unusual Luminescence Lines In Gan, M. A. Reshchikov, D. Huang, F. Yun, P. Visconti, L. He, H. Morkoç, J. Jasinski, Z. Liliental-Weber, R. J. Molnar, S. S. Park, K. Y. Lee

Electrical and Computer Engineering Publications

A series of sharp intense peaks was observed in the low-temperature photoluminescence spectrum of unintentionally doped GaN in the photon energy range between 3.0 and 3.46 eV. We attributed the majority of these peaks to excitons bound to unidentified structural and surface defects. Most of the structural- and surface-related peaks (at 3.21, 3.32, 3.34, 3.35, 3.38, and 3.42 eV) were observed in Ga polar films. In N polar GaN, we often observed the 3.45 eV peak attributed to excitons bound to the inversion domain interfaces.

Mass Transfer Coefficients For Laminar Longitudinal Flow In Hollow-Fibre Contactors, Ashok S. Sangani, Sangkyun Koo

Biomedical and Chemical Engineering - All Scholarship

We consider the problem of predicting the rate of mass transfer to a fluid flowing parallel to the axes of randomly placed aligned tubes, a model of hollow-fibre contactors. The analysis is carried out for the limiting cases of short contactors, for which the concentration boundary layers remain thin compared with the radius of the tubes, and for the fully developed case corresponding to very long tubes. Numerical simulations for random arrays are carried out for N randomly placed tubes within a unit cell of a periodic array. It is shown that the mass transfer coefficient for the fully developed …

Design, Fabrication, And Characterization Of An Alternating Phase Shifting Mask For Duv Lithography, Andrew C. Estroff

Journal of the Microelectronic Engineering Conference

The goal of this project is to design, fabricate, and characterize alternating phase shift masks for 248nm DUV lithography. The characterization of the masks was to include etch depth and sidewall angle measurements via atomic force microscopy (AFM). Etch times were to be varied in order to induce phase changes of 900, 1800, and 270°; one binary chrome on glass mask was also supposed to be fabricated to show the enhancements offered in processing by the phase shifting masks. The measurements of the etch profiles should not only be useful in determining the achieved phase shift and their correlation to …

Process Metrology For Ultrathin Gate Dielectrics, Julien Buisson

Journal of the Microelectronic Engineering Conference

One of the major challenges is to be able to grow and accurately measure such thicknesses of gate oxides. In addition, the gate oxide thickness may change during the polysilicon deposition, which is important to measure from the device point of view. The use of variable angle spectroscopic ellipsometer (VASE) has been shown to provide a technique for directly measuring the thickness of the oxide underneath polysilicon. The objective of this study Is to use VASE (energy range from 0.78 eV to 6 eV, which corresponds to wavelengths from 200 to 1600 nm) to measure ultra thin silicon dioxide layers …

Santa Clara Magazine, Volume 45 Number 3, Winter 2003, Santa Clara University

Santa Clara Magazine

10 - ACADEMIC EXCELLENCE AT SCU By Paul Locatelli, S.J. ln an adaptation of his convocation address, SCU 's president describes the University's goal to educate "the whole person."

12 - 'BECKHAM' BOOSTS SCU SOCCER By Victoria Hendel De La O. References to SCU in the hit movie have brought international attention to the women's soccer program.

14 - SEEKING SOLUTIONS Experts vi sit campus to discuss the issue of clergy abuse and work on a book about the topic.

18 - UNEARTHING THE PAST By Connie Skipitares. SCU archaeologists, anthropologists, and students probe a site near campus to learn …

Almeria-Mars: A Web Based Robotic Simulation, John Travis Ian Wood

Theses Digitization Project

This project discusses the concepton of a web-based simulation. In particular, it will deal with the development of a robotic Mars Pathfinder simulation delivered via the World Wide Web.

Military Leadership: A Context Specific Review, Leonard Wong, Paul Bliese, Dennis Mcgurk

United States Army: Publications

The purpose of this article is to review the literature on military leadership and highlight research opportunities for leadership scholars. The review uses a context specific approach and turns to a simplified version of Hunt’s (Hunt, J. G. (1991). Leadership: A new synthesis. Newbury Park, California: Sage) extended multilevel leadership model as a template to examine the many facets of military leadership. The military leadership literature is stratified into the systems, organizational, and direct levels of leadership with an examination of studies on the critical tasks and individual capabilities required at each level. Additionally, studies on organizational culture and effectiveness …

The Prevalence And Severity Of Coronary Artery Calcification On Coronary Artery Computed Tomography In Black And White Subjects, Timothy C. Lee, Patrick G. O’Malley, Irwin Feuerstein, Allen J. Taylor

United States Army: Publications

OBJECTIVES We studied the relationship between coronary artery calcium (CAC) and race in asymptomatic, active-duty personnel in the Prospective Army Coronary Calcium (PACC) project.
BACKGROUND Valid cardiovascular risk assessments in black Americans using coronary artery computed tomography (coronary CT) require the generalizability of population-based CAC score distributions derived from primarily white patient populations.
METHODS Among 1,000 consecutive participants (mean age, 42 ± 2 years; range, 40 to 45 years), 999 participants underwent coronary CT and indicated a specific racial affiliation. This included white, non-Hispanic in 699 (69.9%) participants and black, non-Hispanic in 194 (19.4%) participants. Univariate associations between race and …

Rodent Sperm Analysis In Field-Based Ecological Risk Assessment: Pilot Study At Ravenna Army Ammunition Plant, Ravenna, Ohio, Lawrence V. Tannenbaum, Matthew Bazar, Melanie S. Hawkins, Barney W. Cornaby, Elizabeth A. Ferguson, L. Chantelle Carroll, Patrick F. Ryan

United States Army: Publications

Ecological risk assessment (ERA) guidance recommends that field-truthing efforts proceed when modeled hazard quotients (HQs) suggest that toxicological effects are occurring to site receptors. To date, no field methods have been proposed by the regulatory community that can lead to definitive determinations of acceptable or unacceptable risk for birds and mammals, the two terrestrial classes of receptors that are commonly assessed using the HQ method. This paper describes rodent sperm analysis (RSA) as a viable method to be applied in the field at sites with historical contamination. RSA is capable of detecting biological differences that bear on reproduction, a highly …

Retrieval Of Subpixel Snow-Covered Area And Grain Size From Imaging Spectrometer Data, Thomas H. Painter, Jeff Dozier, Dar A. Roberts, Robert E. Davis, Robert O. Green

United States Army: Publications

We describe and validate an automated model that retrieves subpixel snow-covered area and effective grain size from Airborne Visible/ Infrared Imaging Spectrometer (AVIRIS) data. The model analyzes multiple endmember spectral mixtures with a spectral library of snow, vegetation, rock, and soil. We derive snow spectral endmembers of varying grain size from a radiative transfer model; spectra for vegetation, rock, and soil were collected in the field and laboratory. For three AVIRIS images of Mammoth Mountain, California that span common snow conditions for winter through spring, we validate the estimates of snow-covered area with fine-resolution aerial photographs and validate the estimates …

Transformation Of 2-Line Ferrihydrite To 6-Line Ferrihydrite Under Oxic And Anoxic Conditions, Ravi K. Kukkadapu, John M. Zachara, James K. Fredrickson, Steven C. Smith, Alice C. Dohnalkova, Colleen K. Russel

United States Department of Energy: Publications

Mineralogical transformations of 2-line ferrihydrite were studied under oxic and Fe³⁺-reducing conditions to establish the role, if any, of 6-line ferrihydrite (“well” organized ferrihydrite) in the reaction pathway and as a final product. In oxic experiments, concentrated suspensions (0.42 mol/L Fe³⁺ in 0.1 mol/L NaClO₄) of freshly synthesized 2-line ferrihydrite, with and without 3% Ni2+, were aged at an initial pH = 7.2 (unbuffered and unadjusted) and 25°C for more than three years. X-ray diffraction, transmission electron microscopy, and Mössbauer spectroscopy measurements were performed on the solids after different aging periods. The primary mineralogical products …

Microbial Reduction Of Structural Fe(Iii) In Illite And Goethite, Hailiang Dong, Ravi K. Kukkadapu, James K. Fredrickson, John M. Zachara, David W. Kennedy, Heather M. Kostandarithes

United States Department of Energy: Publications

Microbial reduction of Fe(III) in illite was studied to evaluate the possibility of microbial utilization of Fe(III) in sedimentary clays and to determine the effects of bioreduction on clay composition and structure. A subsurface bacterium (Shewanella putrefaciens CN32) and illite separates (

Mossbauer And Optical Spectroscopic Study Of Temperature And Redox Effects On Iron Local Environments In A Fe-Doped (0.5 Mol% Fe2o3)18na2o–72sio2 Glass, Ravi K. Kukkadapu, Hong Li, Gary L. Smith, J.D. Crum, Jun-Sik Jeoung, W. Howard Poisl, Michael C. Weinberg

United States Department of Energy: Publications

Local environments of ferric and ferrous irons were systematically studied with Mössbauer (at liquid helium temperature)and ultraviolet–visible–near infrared spectroscopic methods for various 18Na₂O–72SiO₂ glasses doped with 0.5 mol% Fe₂O₃. These were prepared at temperatures of 1300–1600 °C in ambient air or at 1500 °C under reducing conditions with oxygen partial pressures from 12.3 to 0.27 x 10^-7 atmospheres. The Mössbauer spectroscopic method identified three types of local environments, which were represented by the Fe³⁺ sextet, the Fe³⁺ doublet, and the Fe²⁺ doublet. The Fe³⁺ sextet ions were assigned …

Influence Of Electron Donor/Acceptor Concentrations On Hydrous Ferric Oxide (Hfo) Bioreduction, James K. Fredrickson, Sreenivas Kota, Ravi K. Kukkadapu, Chongxuan Liu, John M. Zachara

United States Department of Energy: Publications

Dissimilatory metal-reducing bacteria (DMRB) facilitate the reduction of Fe and Mn oxides in anoxic soils and sediments and play an important role in the cycling of these metals and other elements such as carbon in aqueous environments. Previous studies investigating the reduction of Fe(III) oxides by DMRB focused on reactions under constant initial electron donor (lactate) and electron acceptor (Fe oxide) concentrations. Because the concentrations of these reactants can vary greatly in the environment and would be expected to influence the rate and extent of oxide reduction, the influence of variable electron acceptor and donor concentrations on hydrous ferric oxide …

Nonlocal Bacterial Electron Transfer To Hematite Surfaces, Kevin Rosso, John M. Zachara, James K. Fredrickson, Yuri Gorby, Steven Smith

United States Department of Energy: Publications

Mechanisms by which dissimilatory iron-reducing bacteria utilize iron and manganese oxide minerals as terminal electron acceptors for respiration are poorly understood. In the absence of exogenous electron shuttle compounds, extracellular electron transfer is generally thought to occur through the interfacial contact area between mineral surfaces and attached cells. Possible alternative reduction pathways have been proposed based on the discovery of a link between an excreted quinone and dissimilatory reduction. In this study, we utilize a novel experimental approach to demonstrate that Shewanella putrefaciens reduces the surface of crystalline iron oxides at spatial locations that are distinct from points of attachment.

Transport Of Multiple Tracers In Variably Saturated Humid Region Structured Soils And Semi-Arid Region Laminated Sediments, M.A. Mayes, P.M. Jardine, T.L. Mehlhorn, B.N. Bjornstad, J.L. Ladd, John M. Zachara

United States Department of Energy: Publications

The processes governing physical nonequilibrium (PNE)—coupled preferential flow and matrix diffusion—are diverse between humid and semi-arid regions, and are directly related to climate and rock/sediment type, and indirectly related to subsequent soil profile development. The fate and transport of contaminants in these variably saturated undisturbed media is largely a function of the influence of PNE processes. Large cores of laminated silts and sands were collected from the US Department of Energy Pacific Northwest National Laboratory (PNNL) in semi-arid south central Washington. Additional cores of weathered, fractured interbedded limestone and shale saprolite were collected from the Oak Ridge National Laboratory (ORNL) …

Scale-Up Of The Fermentation And Purification Of The Recombinant Heavy Chain Fragment C Of Botulinum Neurotoxin Serotype F, Expressed In Pichia Pastoris, Scott K. Johnson, Wenhui Zhang, Leonard A. Smith, Karen J. Hywood-Potter, S. Todd Swanson, Vicki L. Schlegel, Michael M. Meagher

Michael Meagher Publications

A recombinant heavy chain fragment C of botulinum neurotoxin serotype F (BoNTF(Hc)) has been expressed in Pichia pastoris for use as an antigen in a proposed human vaccine. P. pastoris cells were grown using glycerol batch, glycerol fed-batch, and methanol fedbatch methods to achieve high cell densities. The total cellular protein recovered after homogenization was 72 mg/g of cell paste. BoNTF(Hc) was purified from soluble Pichia cell lysate employing ion-exchange chromatographic (IEC) and hydrophobic interaction chromatographic (HIC) methods developed at the bench scale using 10–100mL columns. The process was performed at the pilot scale using 1–4 L columns for evaluation …

Extraction Of A Valuable Compound From A Waste Stream For Adm Ringaskiddy, Colin G. Burkley

Theses

This thesis was originally conceived as a potential Masters Degree research programme by the management of ADM Ringaskiddy as a means of maximizing throughput through the plant’s wastewater treatment facility. This facility is a major producer of citric acid using beet molasses and a fermentation process. It was proposed that removal of a compound, known as betaine, from the citric acid process waste stream would reduce the Chemical Oxygen Demand (COD) content of the waste requiring treatment before disposal. This would be achieved by using the citric acid process waste as the feedstock for a betaine extraction process. The wastewater …

Modeling Sugarbeet Quality Variables From Satellite Images And Canopy Spectral Indices, Subodh Kulkarni

Electronic Theses and Dissertations

Remote sensing was used to model crop quality from measurements of canopy spectra. Three indices of canopy characteristics, derived from satellite image data, were tested for relationship to whole-field sugarbeet quality. Quality was quantified as recoverable sucrose per ton of harvested sugarbeets. Quality data were extracted from the year 2002 Field Database of the Southern Minnesota Beet Sugar Co-operative, (SMBSC), Renville, Minnesota. Linear regression models utilizing canopy indices and changes in canopy indices over time were tested for relationship to sugarbeet quality for four classes of sugarbeets. Classes of sugarbeet tested represented fields planted to a mix of varieties resistant …

Inside Unlv, Richard Jensen, Donna Mcaleer, Jennifer Vaughan, Cate Weeks, Carol C. Harter, Jeffrey Koep

Inside UNLV

No abstract provided.

Drum Transcription In The Presence Of Pitched Instruments Using Prior Subspace Analysis, Derry Fitzgerald, Robert Lawlor, Eugene Coyle

Conference papers

This paper demonstrates the use of Prior Subspace Analysis (PSA) as a method for transcribing drums in the presence of pitched instruments. PSA uses prior subspaces that represent the sources to be transcribed to overcome some of the problems associated with other subspace methods such as Independent Subspace Analysis (ISA) or sub-band ISA. The use of prior knowledge results in improved robustness for transcription purposes and enables the method to work more readily in the presence of pitched instruments than other subspace methods. The system presented in this paper attempts to extend the use of PSA to transcribe drum sounds …

Design And Evaluation Of A Pdf Print Estimating System, Mengtsung Tai

Dissertations and Theses @ UNI

This research consisted of designing and evaluating portable document format (PDF) print estimating system to commercial systems. Taking into account functionality, reliability, standardization, and integration, the conventional design method (Pressman, 1997) was used to develop the print estimating system. Considering the printer's viewpoint, added features make the system function online and offline and compatible with all common computer platforms. After the system was developed, experts and entry-level users evaluated the system for software usability (Nielsen, 2000; Shneiderman, 1998). A total of 26 experts and 38 entry-level users responded to 14 questions about usability in a personal interview survey. Statistical analysis …

Electronic Commerce: Formation Of Contract Under Malaysian Law, Chun Boon Loo

Student Works (2000-2009)

The subject of contract formation is a fundamental component of the law of contract as all aspects of contractual performance are dependent on a contract being properly formed. The purpose of this Thesis is to examine how the novelties introduced by the Internet and other electronic media like Electronic Data Interchange (EDI) and electronic mails affect the existing legal principles concerning formation of contracts under the law of Malaysia. This Thesis argues that the existing law in Malaysia governing the formation of contracts is fraught with uncertainty when applied to the Internet and other electronic media. This Thesis submits that …

Report On The Third Acm/Ieee Joint Conference On Digital Libraries (Jcdl), Michael L. Nelson

Computer Science Faculty Publications

The Third ACM/IEEE Joint Conference on Digital Libraries (JCDL 2003) was held on the campus of Rice University in Houston, Texas, May 27 - 31. Regarding the merging of the ACM and IEEE conference series, in the JCDL 2002 conference report published last year in D-Lib Magazine Edie Rasmussen noted, "Perhaps by next year...no one will remember that it wasn't always so" [1]. Judging by the number of participants I met who did not know that the ACM and IEEE used to hold separate digital library conferences, Rasmussen's prediction has come to pass.

Quantifying The Effects Of Small-Scale Heterogeneities On Flow And Transport In Undisturbed Cores From The Hanford Formation, M. N. Pace, M. A. Mayes, P. M. Jardine, T. L. Mehlhorn, John M. Zachara, B.N. Bjornstad

United States Department of Energy: Publications

Accelerated migration of contaminants in the vadose zone has been observed beneath tank farms at the U.S. Department of Energy’s Hanford Reservation, Richland, WA. This paper focuses on quantifying hydrologic processes that control the fate and transport of contaminants in the unsaturated sediments beneath the Hanford tank farms. The experimental approach involved the use of field relevant, long-term unsaturated nonreactive transport experiments in undisturbed sediments from the Hanford Formation. Undisturbed sediment cores were collected from a laminated fine-grained sand unit within the Hanford Formation in both the vertical direction (flow cross bedding) and the horizontal direction (flow bedding parallel). Laboratory-scale …

Secondary Mineralization Pathways Induced By Dissimilatory Iron Reduction Of Ferrihydrite Under Advective Flow, Colleen M. Hansel, Shawn G. Benner, Jim Neiss, Alice Dohnalkova, Ravi K. Kukkadapu, Scott Fendorf

United States Department of Energy: Publications

Iron (hydr)oxides not only serve as potent sorbents and repositories for nutrients and contaminants but also provide a terminal electron acceptor for microbial respiration. The microbial reduction of Fe (hydr)oxides and the subsequent secondary solid-phase transformations will, therefore, have a profound influence on the biogeochemical cycling of Fe as well as associated metals. Here we elucidate the pathways and mechanisms of secondary mineralization during dissimilatory iron reduction by a common iron-reducing bacterium, Shewanella putrefaciens (strain CN32), of 2-line ferrihydrite under advective flow conditions. Secondary mineralization of ferrihydrite occurs via a coupled, biotic-abiotic pathway primarily resulting in the production of magnetite …