Engineering Commons^™

Evaluation And Modeling Of Repeated Load Test Data Of Asphalt Concrete For Mechanistic-Empirical Flexible Pavement Design, Stephen Price

Theses and Dissertations

The Mechanistic-Empirical Pavement Design Guide (MEPDG) uses a power model that incorporates Dynamic Modulus (DM) as a factor in predicting rutting performance of asphalt concrete. The rutting model is empirical and the rutting profiles obtained from the model are largely based on the adjustment of calibration constants not the DM. Various DM values would be capable of producing similar rutting profiles based on the current model. This study evaluated using accumulated strain data obtained from the Repeated Load Test (RLT) as an alternative to using DM. In addition, a model to represent the accumulated strain data obtained from the RLT …

Gas Holdup In Trayed Bubble Column Reactors, Javier Alvaré, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

The Sectionalization of Conventional Bubble Columns by Perforated Trays into Trayed Bubble Columns (TBCs) Has Much Potential in Biochemical and Petroleum Refining Processes, as an Effective Way to Improve the Gas-Liquid Contacting Efficiency and Reduce the Liquid Back mixing. in This Work, the Effects of Tray Geometry, Superficial Gas Velocity, and Superficial Liquid Velocity on the overall Gas Holdup Have Been Investigated. It Was Determined that the Trays Significantly Increase the overall Gas Holdup. the Tray Hole Diameter and Superficial Gas Velocity Were Determined to Be the Most Important Factors. © 2006 American Chemical Society.

High Temperature Heat Exchanger Project: Quarterly Progress Report January 1, 2006 Through March 31, 2006, Anthony Hechanova

Publications (NSTD)

Quarterly Collaboration Meeting. The UNLVRF HTHX Project quarterly meeting was held in Albuquerque, NM, March 16 and 17, 2006. The purpose of the meeting was to promote collaboration and communication among the UNLV Research Foundation partners. A tour of Sandia National Laboratory was also provided that included a visit to their sulfuric acid decomposition test apparatus. There were 24 attendees from universities, national laboratories, and private industry. Collaborators discussed their research progress. The next meeting will be in July in Salt Lake City, UT.

Thermal Performance Of Low Approach Evaporative Cooling Systems In Buildings, Ben Costelloe, Donal Finn

Conference Papers

Meteorological enthalpy analysis of temperate and maritime climates above 45˚N suggests that the water-side evaporative cooling technique has considerable unrealised potential with contemporary "high temperature" building cooling systems - such as chilled ceilings. As low approach conditions are the key to exploiting the cooling potential of the ambient air, thermal performance at such conditions needs to be investigated. To address the research issues a test rig, based on an open cooling tower and plate heat exchanger and designed to maximise evaporative cooling potential, has been constructed at DIT. A combination of experimental measurement and analysis is used in the investigations. …

Means Of Seeding And Metallizing Polyimide, Ravi F. Saraf

Department of Chemical and Biomolecular Engineering: Patents

A method to selectively metallize polyimide with an all electroless process.

Highly Coercive Rapidly Solidified Sm–Co Alloys, Shampa Aich, V.K. Ravindran, Jeffrey E. Shield

Nebraska Center for Materials and Nanoscience: Faculty Publications

Highly coercive (H_c up to 37 kOe at 300 K), high remanent permanent magnets have been achieved by rapid solidification of binary Sm–Co alloys and Sm–Co alloys modified with Nb and C. Rapidly solidified SmCo_x alloys with x ranging from 5 to 11.5 formed predominantly a solid solution TbCu7-type SmCo7 phase, although hcp Co was observed for x>7.3. A coercivity value of 10 kOe was observed for xx, as primary dendrites. Additions of 3 at. % Nb or 3 and 5 at. % C profoundly affected the coercivity values. Transmission electron microscopy (TEM) investigations revealed …

Paper Session V: Steganography And Terrorist Communications - Current Information And Trends - Tools, Analysis And Future Directions In Steganalysis In Context With Terrorists And Other Criminals, William Eyre, Marcus Rogers

Annual ADFSL Conference on Digital Forensics, Security and Law

In ancient times, users communicated using steganography, “…derived from the Greek words steganos, meaning ‘covered’, and graphein, meaning ‘to write.’” (Singh, 1999, p.5) Steganography facilitates secret, undetected communication. In modern times, in the context of the Global War on Terror, national intelligence and law enforcement agencies need tools to detect hidden information (steganography) in various types of media, most specifically to uncover the placement of hidden information in images. This paper will look at steganography in general terms, presenting the theory of some common steganographic techniques and touching on some theoretical work in steganography. Then a discussion of how to …

Paper Session V: Forensic Software Tools For Cell Phone Subscriber Identity Modules, Wayne Jansen, Rick Ayers

Annual ADFSL Conference on Digital Forensics, Security and Law

Cell phones and other handheld devices incorporating cell phone capabilities (e.g., smart phones) are ubiquitous. Besides placing calls, cell phones allow users to perform other tasks such as text messaging and phonebook entry management. When cell phones and cellular devices are involved in a crime or other incident, forensic specialists require tools that allow the proper retrieval and speedy examination of data present on the device. For devices conforming to the Global System for Mobile Communications (GSM) standards, certain data such as dialed numbers, text messages, and phonebook entries are maintained on a Subscriber Identity Module (SIM). This paper gives …

Paper Session Iv: Development And Delivery Of Coursework - The Legal/Regulatory/Policy Environment Of Cyberforensics, John W. Bagby, John C. Ruhnka

Annual ADFSL Conference on Digital Forensics, Security and Law

This paper describes a cyber-forensics course that integrates important public policy and legal issues as well as relevant forensic techniques. Cyber-forensics refers to the amalgam of multi-disciplinary activities involved in the identification, gathering, handling, custody, use and security of electronic files and records, involving expertise from the forensic domain, and which produces evidence useful in the proof of facts for both commercial and legal activities. The legal and regulatory environment in which electronic discovery takes place is of critical importance to cyber-forensics experts because the legal process imposes both constraints and opportunities for the effective use of evidence gathered through …

Unlv Research Foundation High Temperature Heat Exchanger Development, Anthony Hechanova

Publications (NSTD)

Barriers addressed:

Nuclear Hydrogen Initiative R&D Plan – Material performance and component design and testing for: intermediate heat exchanger and high-temperature thermochemical water splitting (H2SO4 decomposition and HI decomposition). Improved materials for High Temperature Electrolysis.

Paper Session Iv: Toward Understanding Digital Forensics As A Profession: Defining Curricular Needs (***Research In Process ***), Michelle Wolf, Alan Shafer, Michael Gendron

Annual ADFSL Conference on Digital Forensics, Security and Law

This research paper presents research in process which attempts to define the common body of knowledge (CBK) of digital forensics. Digital forensics is not well defined not does it have a generally accepted CBK. The first three phases of completed research, in a four-phase research process are discussed. The early results have created a preliminary CBK, and final validation is underway.

Paper Session Iii: Research Brief: A Curriculum For Teaching Information Technology Investigative Techniques For Auditors, Grover S. Kearns, Elizabeth V. Mulig

Annual ADFSL Conference on Digital Forensics, Security and Law

Recent prosecutions of highly publicized white-collar crimes combined with public outrage have resulted in heightened regulation and greater emphasis on systems of internal control. Because both white-collar and cybercrimes are usually perpetrated through computers, auditors’ knowledge of information technology (IT) is now more vital than ever. However, preserving digital evidence and investigative techniques, which can be essential to fraud examinations, are not skills frequently taught in accounting programs. Furthermore, many students are not instructed in the use of computer assisted auditing tools and techniques – applications that might uncover fraudulent activity. Only a limited number of university-level accounting classes provide …

Paper Session Ii: Forensic Scene Documentation Using Mobile Technology, Ibrahim Baggili

Annual ADFSL Conference on Digital Forensics, Security and Law

This paper outlines a framework for integrating forensic scene documentation with mobile technology. Currently there are no set standards for documenting a forensic scene. Nonetheless, there is a conceptual framework that forensic scientists and engineers use that includes note taking, scene sketches, photographs, video, and voice interview recordings. This conceptual framework will be the basis that a mobile forensic scene documentation software system is built on. A mobile software system for documenting a forensic scene may help in standardizing forensic scene documentation by regulating the data collection and documentation processes for various forensic disciplines.

Magnetic Behavior Of Rapidly Solidified Pr–Co Alloys With The Tbcu7-Type Structure, J. Kostogorova, Jeffrey E. Shield

Nebraska Center for Materials and Nanoscience: Faculty Publications

Rapid solidification has been utilized to produce a series of Pr–Co alloys between the Pr₂Co₁₇ and PrCo₅ stoichiometries. In this system, PrCo₅ has easy axis magnetization while Pr₂Co₁₇ has easy-plane magnetization. Alloys of the form (Pr_xCo_1-x)₉₄Ti₃C₃ with x ranging from 0.105 corresponding to the Pr₂Co₁₇ compound tox=0.167 corresponding to the PrCo₅ compound were produced by melt spinning at a tangential wheel speed of 40 m/ s. The rapid solidification and alloying additions were found to suppress …

Structural And Magnetic Properties Of Laves Compounds Dy1-XPrX(Fe0.35Co0.55B0.1)2 (0≤X≤1), W.J. Ren, D. Li, Yucheng Sui, W. Liu, X.G. Zhao, J.J. Liu, J. Li, Z.D. Zhang

Nebraska Center for Materials and Nanoscience: Faculty Publications

Dy_1-xPr_x(Fe_0.35Co_0.55B_0.1)₂ (0≤x≤1) Laves compounds with a cubic MgCu₂-type structure were synthesized by arc melting and subsequent annealing. The lattice parameter of the Laves compounds linearly increases, while the Curie temperature T_c decreases with increasing Pr content. The saturation magnetization M₅ at 5 K or 295 K for the Dy_1-xPr_x(Fe_0.35Co_0.55B_0.1)₂ alloys decreases to reach a minimum, then increases with increasing Pr content. The composition for magnetic moment compensation is about x …

Tsunamigenic Probabilistic Fault Displacement Hazard Analysis For Subduction Zones, Robb E.S. Moss, Thaleia Travasarou

Civil and Environmental Engineering

The recent Sumatra earthquake and subsequent tsunami has provoked greater awareness of the hazard posed by coseismic fault displacement associated with sea-floor subduction zones. This catastrophic event has focused renewed efforts on tsunami forecasting, modeling, and detection. Yet the mechanism that causes this type of tsunami, coseismic fault displacement of a sea-floor subduction zone, is still treated deterministically. This paper describes a methodology for probabilistic fault displacement hazard analysis (PFDHA) for a sea-floor subduction zone, and presents example displacement hazard curves for the Cascadia Subduction Zone. The goal of this probabilistic methodology is to quantify the uncertainty and associated hazard …

Incorporating Parameter Uncertainty Into Attenuation Relationships, Robb E.S. Moss, Armen Der Kiureghian

Civil and Environmental Engineering

Strong ground motion attenuation relationships estimate the mean and variance of ground shaking as it decreases with distance from an earthquake source. Current relationships use “classical” regression techniques that treat the input variables or parameters as exact, neglecting the uncertainties associated with the measurement of ground acceleration, moment magnitude, site-to-source distance, shear wave velocity, etc. This leads to a poorly constrained estimate of the uncertainty of strong ground motions. This paper discusses the work in progress on; a) estimating the statistics of parameter uncertainty, and b) incorporating the parameter uncertainty into the regression of strong motion attenuation data using a …

Off Campus Furniture Retail Development, Dan E. White, Richard D. Mccarthy, Christopher T. Cowgill

Honors Theses

The development of a 3.3 acre parcel of land at 5110 S. Westnedge, City of Portage, Kalamazoo County, Michigan is being proposed by Cowgill and Associates Inc. This will be a commercial development project with Off Campus Furniture taking occupancy after construction is complete. The building will be two stories with 57,500 square feet of usable floor space. All design was completed in accordance to the City of Portage, and the Michigan building code with design being done in accordance to ACI Code 318-05. The development includes but is not limited to site work, including storm water runoff and design, …

Interpersonal Sensitivity And Information Sharing During Layoffs: Implications For Job Seekers, Rainer Seitz

Dissertations and Theses

Layoffs have become an increasingly common cost reduction strategy implemented by organizations. In addition to affecting those who lose their jobs or remain with the organization after a reduction, layoffs may also affect individuals outside the organization. A systems perspective on layoffs takes into account the various stakeholders who are affected by such an action beyond those traditionally studied. Job applicants are one group of stakeholders for which research on the implications of layoffs is lacking. The purpose of this dissertation was to examine the specific organizational justice factors of interpersonal sensitivity and information sharing in a layoff and their …

Classification Of Infrasound Events Using Hermite Polynomial Preprocessing And Radial Basis Function Neural Networks, Christopher G. Lowrie

Electrical Engineering and Computer Science Faculty Publications

A method of infrasonic signal classification using hermite polynomials for signal preprocessing is presented. Infrasound is a low frequency acoustic phenomenon typically in the frequency range 0.01 Hz to 10 Hz. Data collected from infrasound sensors are preprocessed using a hermite orthogonal basis inner product approach. The hermite preprocessed signals result in feature vectors that are used as input to a parallel bank of radial basis function neural networks (RBFNN) for classification. The spread and threshold values for each of the RBFNN are then optimized. Robustness of this classification method is tested by introducing unknown events outside the training set …

Cross-Sensor Fusion Of Imagery For Improved Information Extraction, Samuel Peter Kozaitis, Michel Ouendeno

Electrical Engineering and Computer Science Faculty Publications

We combined cross-sensor data that leads to improved extraction of information from disparate sensors. We presented a new method for signal fusion that uses different transforms for the forward transforms of two images and a common transform for the inverse. When using a fusion rule that selects the maximum value between images, we were able to transfer more energy to the result using our method. Our method could form the basis of a new image fusion approach because it offers a way to transfer more energy to the result not possible with a conventional approach.

Design Concepts And Process Analysis For Transmuter Fuel Manufacturing: Quarterly Progress Report #6, Kamalakar Alluri, Georg F. Mauer

Fuels Campaign (TRP)

Project Milestones

• Completed a systematic study seeking to arrive at an optimized plant configuration, using value engineering techniques in January 2006.

• Vision-based robot serving and automated plant safety monitoring is currently in progress.

An Lmi Approach To Discrete-Time Observer Design With Stochastic Resilience, Edwin E. Yaz, Chung Seop Jeong, Yvonne I. Yaz

Electrical and Computer Engineering Faculty Research and Publications

Much of the recent work on robust control or observer design has focused on preservation of stability of the controlled system or the convergence of the observer in the presence of parameter perturbations in the plant or the measurement model. The present work addresses the important problem of stochastic resilience or non-fragility of a discrete-time Luenberger observer which is the maintenance of convergence and/or performance when the observer is erroneously implemented possibly due to computational errors i.e. round off errors in digital implementation or sensor errors, etc. A common linear matrix inequality framework is presented to address the stochastic resilient …

In-Situ Testing Of A Carbon/Epoxy Isotruss Reinforced Concrete Foundation Pile, Sarah Richardson

Theses and Dissertations

This thesis focuses on the field performance of IsoTruss®-reinforced concrete beam columns for use in driven piles. Experimental investigation included one instrumented carbon/epoxy IsoTruss®-reinforced concrete pile (IRC pile) and one instrumented steel-reinforced concrete pile (SRC pile) which were driven into a clay profile at a test site. These two piles, each 30 ft (9 m) in length and 14 in (36 cm) in diameter, were quasi-statically loaded laterally until failure. Behavior was predicted using three different methods: 1) a commercial finite difference-based computer program called Lpile; 2) a Winkler foundation model; and, 3) a simple analysis based on fundamental mechanics …

Effect Of Silicon Content On The Corrosion Resistance And Radiation-Induced Embrittlement Of Materials For Advanced Heavy Liquid Metal Nuclear Systems: Quarterly Progress Report (November 2005 – January 2006), Ajit K. Roy

Transmutation Sciences Materials (TRP)

This task is intended to study the effect of Si content not only on the corrosion resistance but also on the radiation-induced embrittlement of martensitic stainless steels. The susceptibility of these alloys with different Si content to stress corrosion cracking, general corrosion and localized corrosion will be evaluated in the molten LBE and aqueous environments of different pH values using state-of-the-art testing techniques. Testing in the aqueous media is intended to develop baseline data for comparison purpose. Radiation-induced embrittlement of these alloys will initially be studied by irradiating the test specimens with bremmstrahlung gamma radiation from 20-40 MeV electron beams …

2nd Annual Undergraduate Research Conference Abstract Book, University Of Missouri--Rolla

Undergraduate Research Conference at Missouri S&T

No abstract provided.

Method And Apparatus For Solder-Less Attachment Of An Electronic Device To A Textile Circuit, James A. Zollo, Bonnie Bachman, Alan R. Beatty, Stephen O. Bozzpme, Nitin B. Desai, Ronald J. Kelley, Rami C. Levy

Economics Faculty Research & Creative Works

A method and apparatus form electrical connections between electronic circuits and conductive threads (102, 104, 106, 108) that are interwoven into textile material (130). Electronic circuits (128), such as semiconductor dies, are connected to a carrier (132) and electrical connections (136) are made to conductive connection areas (110, 112, 114, 116) on the carrier (132). Conductive stitching (202, 204, 206, 208) provides electrical contacts for both the conductive connection areas (110, 112, 114, 116) on the carrier (132) and the conductive threads (102, 104, 106, 108) that are interwoven into the textile material (130). Optionally, a thin, flexible substrate material …

Method For Preparation Of Nanometer Cerium-Based Oxide Particles, X.-D. Zhou, Wayne Huebner, Harlan U. Anderson

Materials Science and Engineering Faculty Research & Creative Works

The invention comprises novel undoped and doped nanometer-scale CeO₂ particles as well as a novel semi-batch reactor method for directly synthesizing the novel particles at room temperature. The powders exhibited a surface area of approximately 170 m²/g with a particle size of about 3-5 nm, and are formed of single crystal particles that are of uniform size and shape. The particles’ surface area could be decreased down to 5 m²/g, which corresponds to a particle size of 100 nm, by thermal annealing at temperatures up to 1000° C. Control over the particle size, size distribution …

The Phase Stability Of Cerium Species In Aqueous Systems Iii. The Ce(Iii/Iv)-H2o-H2o2/O2 System Dimeric Ce(Iv) Species, Pu Yu, Thomas J. O'Keefe

Materials Science and Engineering Faculty Research & Creative Works

Equilibria and thermodynamic data for cerium dimer species were calculated for both the Ce-H₂O-O₂ and Ce-H₂O-H₂O₂ systems. It was found that Ce (IV) has a tendency to form dimers, especially when the total cerium concentration is higher than 0.001 M. There are three major soluble dimer forms considered in this paper: (CeOCe)⁶⁺,(CeOCe)(OH)⁵⁺, and (CeOCe)(OH)²⁴⁺, all having very similar standard potentials (E⁰ _{Ce(IV)dimer/Ce(III)}01.66∀0.02V). When they coexist in solution, the concentration ratio of the Ce (IV) dimer to Ce3+ depends on the total cerium concentrations, the …

Erratum: “Terahertz Studies Of The Dielectric Response And Second-Order Phonons In A Gase Crystal” [Appl. Phys. Lett.87, 182104 (2005)], B. L. Yu, F. Zeng, V. Kartazayev, R. R. Alfano, K. C. Mandal

Faculty Publications

No abstract provided.