Digital Commons Network^™

A Simple Inexpensive Method For The Rapid Testing Of The Photocatalytic Activity Of Self Cleaning Surfaces, Andrew Mills, James Hepburn, David Hazafy, Christopher O'Rourke, Josef Krysa, Michal Baudys, Martin Zlamal, Hana Bartkova, Claire Hill, Kim Winn, Morten Simonsen, Erik Sogaard, Suresh Pillai, Nigel Leyland, Rachel Fagan, Frank Neumann, Christina Lampe, Tobias Graumann

Articles

A rapid semi-quantitative, inexpensive method,using a simple digital scanner and an indicator ink, suitable for use in the laboratory, or in the field, for assessing the photocatalytic activity of commerical photocatalytic self-cleaning materials such as glass, is described. The repeatability of the current method is found to be hight and better than many of the previously reported ISO photocatalyst tests.

Follow The Dotted Line: Composition Portfolio With Commentary., David Bremner

Doctoral

This research consists of a portfolio of original musical compositions, accompanied by a commentary which examines the aesthetic and technical aspects of each piece and of the body of work as a whole. It traces the development of a mature and original compositional style. The works presented share a focus on the concept of line. This concept is explored in a range of diverse instrumentations (orchestra, choral, solo instrument/voice, chamber ensemble, electronics) and diverse compositional methods (fully-notated scores, graphic scores, devised improvised schemes). The emphasis is on lines that are constrained within a particular pitch register, while being explored fully …

Social Group Detection Based Routing In Delay Tolerant Networks, Roy Cabaniss, Srinivasa S. Vulli, Sanjay Madria

Computer Science Faculty Research & Creative Works

When implementing Mobile Ad Hoc Networks, a key characteristic of the network is the mobility pattern of the nodes. Based on the application, nodes can follow semi-predictable patterns, such as the routes followed by Vehicular Ad Hoc Networks, or the more strict schedules followed by aerial reconnaissance. Optimal routing schemes tend to take advantage of information regarding these patterns. In social environments, such as wildlife tracking or sending messages between humans, the devices and/or users will follow regular contact habits, tending to encounter social groups in which they participate. By identifying these groups, the patterns are used to optimize routing …

Probing The Circulation Of Ring-Shaped Bose-Einstein Condensates, Noel Murray, Michael Krygier, Mark Edwards, K. C. Wright, Gretchen K. Campbell, Charles W. Clark

Physics & Astronomy: Faculty Publications

This paper reports the results of a theoretical and experimental study of how the initial circulation of ring-shaped Bose-Einstein condensates (BECs) can be probed by time-of-flight (TOF) images. We have studied the dynamics of a BEC after release from a toroidal trap potential by solving the three-dimensional Gross-Pitaevskii (GP) equation. The trap and condensate characteristics matched those of a recent experiment. The circulation, experimentally imparted to the condensate by stirring, was simulated by imprinting a linear azimuthal phase on the initial condensate wave function. The simulated TOF images were in good agreement with the experimental data. We find that upon …

The Effects Of Teacher Preparation Programs On Novice Teachers Regarding Classroom Management, Academic Preparation, Time Management, And Self Efficacy, Dolores Carr

Doctoral Dissertations and Projects

This study examines the national concern regarding types of teacher preparation programs (traditional, alternative) and their effects on classroom management, academic preparation, time management, and self-efficacy of novice teachers. What are the decisions and influences that determine highly qualified teachers; can these traits be learned? Does the type of training a teacher receives determine his/her effectiveness? Who determines the standards for teacher preparation programs? What are the challenges facing teacher preparation programs? Who will be responsible for reform and improvement? A review of literature provides direction in answering these questions. The findings uncovered that the type of teacher preparation programs, …

Between The Man And Beast: Reactions To Evolutionary Science In Alfred, Lord Tennyson's Idylls Of The King And T. H. White's The Once And Future King, Mary Feldman

Masters Theses

The development and popular acceptance of evolutionary theory in the nineteenth century, of which Charles Darwin was perhaps the leading voice, produced perhaps the greatest cultural cataclysm of the Modern age. It held theological and philosophical implications beyond the scientific realm, profoundly impacting the humanities as well as science. The Arthurian legend, a story that has been told and retold for centuries before and after Darwin, offers us a unique opportunity to examine how a preexisting story was radically altered in the light of evolution. Alfred, Lord Tennyson's Idylls of the King and T. H. White's The Once and Future …

Directed Search For Continuous Gravitational Waves From The Galactic Center, J. Aasi, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.

Physics Faculty Research & Creative Works

We present the results of a directed search for continuous gravitational waves from unknown, isolated neutron stars in the Galactic center region, performed on two years of data from LIGO's fifth science run from two LIGO detectors. The search uses a semicoherent approach, analyzing coherently 630 segments, each spanning 11.5 hours, and then incoherently combining the results of the single segments. It covers gravitational wave frequencies in a range from 78 to 496 Hz and a frequency-dependent range of first-order spindown values down to -7.86 x 10^-8 Hz/s at the highest frequency. No gravitational waves were detected. The 90% …

Plasmonic Scaling Of Superconducting Metamaterials, Cihan Kurter, John A. Abrahams, Gennady Shvets, Steven Mark Anlage

Physics Faculty Research & Creative Works

Superconducting metamaterials are utilized to study the approach to the plasmonic limit simply by tuning temperature to modify the superfluid density, and thus the superfluid plasma frequency. We examine the persistence of artificial magnetism in a metamaterial made with superconductors in the plasmonic limit, and compare to the electromagnetic behavior of normal metals as a function of frequency as the plasma frequency is approached from below. Spiral-shaped Nb thin film meta-atoms of scaled dimensions are employed to explore the plasmonic behavior in these superconducting metamaterials, and the scaling condition allows extraction of the temperature dependent superfluid density, which is found …

Nitroxide-Functionalized Graphene Oxide From Graphite Oxide, Yazmin I. Avila-Vega, Cesar C. Leyva-Porras, Marcela Mireles, Manuel Quevedo-Lopez, Javier Macossay-Torres, Jose Bonilla-Cruz

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

A facile method for preparing functionalized graphene oxide single layers with nitroxide groups is reported herein. Highly oxidized graphite oxide (GO=90.6%) was obtained, slightly modifying an improved Hummer’s method. Oxoammonium salts (OS) were investigated to introduce nitroxide groups to GO, resulting in a one-step functionalization and exfoliation. The mechanisms of functionalization/exfoliation are proposed, where the oxidation of aromatic alcohols to ketone groups, and the formation of alkoxyamine species are suggested. Two kinds of functionalized graphene oxide layers (GOFT1 and GOFT2) were obtained by controlling the amount of OS added. GOFT1 and GOFT2 exhibited a high interlayer spacing (d0001 = 1.12nm), …

Symmetry Robust Descriptor For Non-Rigid Surface Matching, Zhiyuan Zhang, Kangkang Yin, Kelvin W. C. Foong

Research Collection School Of Computing and Information Systems

In this paper, we propose a novel shape descriptor that is robust in differentiating intrinsic symmetric points on geometric surfaces. Our motivation is that even the state-of-theart shape descriptors and non-rigid surface matching algorithms suffer from symmetry flips. They cannot differentiate surface points that are symmetric or near symmetric. Hence a left hand of one human model may be matched to a right hand of another. Our Symmetry Robust Descriptor (SRD) is based on a signed angle field, which can be calculated from the gradient fields of the harmonic fields of two point pairs. Experiments show that the proposed shape …

Minutes Of Graduate College Curriculum Committee, November 1, 2013, University Of Northern Iowa. Graduate College Curriculum Committee.

Minutes - Graduate Curriculum Committee

Minutes of the committee that oversees the development of the curriculum of the University of Northern Iowa Graduate College.

Understanding The Genetic Makeup Of Linux Device Drivers, Peter Senna Tschudin, Laurent Reveillere, Lingxiao Jiang, David Lo, Julia Lawall

Research Collection School Of Computing and Information Systems

Attempts have been made to understand driver development in terms of code clones. In this paper, we propose an alternate view, based on the metaphor of a gene. Guided by this metaphor, we study the structure of Linux 3.10 ethernet platform driver probe functions.

Understanding The Genetic Makeup Of Linux Device Drivers, Peter Senna Tschudin, Laurent Reveillere, Lingxiao Jiang, David Lo, Julia Lawall

Research Collection School Of Computing and Information Systems

No abstract provided.

Assessment And Recommendations For Using High-Resolution Weather Information To Improve Winter Maintenance Operations, Michael Baldwin, Kimberly Hoogewind, Derrick Snyder, Matthew Price, R. Jeffrey Trapp

JTRP Technical Reports

A variety of methods for obtaining detailed analyses regarding the timing and duration of winter weather across the state of Indiana for multiple seasons were compared and evaluated during this project. Meteorological information from sources such as surface reporting stations, National Weather Service radars, and three-dimensional weather analysis and prediction systems were utilized in this work. In addition, daily weather forecasts were provided by students at Purdue University during the 2012-13 winter season. These forecasts supplemented the weather forecast information already in use at INDOT. Purdue weather forecasts were systematically evaluated during this project. The results from these assessments are …

Implementation Of Limit States And Load Resistance Design Of Slopes, Rodrigo Salgado, Sang Inn Woo, Faraz S. Tehrani, Yanbei Zhang, Monica Prezzi

JTRP Technical Reports

A logical framework is developed for load and resistance factor design (LRFD) of slopes based on reliability analysis. LRFD of slopes with resistance factors developed in this manner ensures that a target probability of slope failure is not exceeded. Three different target probabilities of failure (0.0001, 0.001 and 0.01) are considered in this report. The ultimate limit state for slope stability (formation of a slip surface and considerable movement along this slip surface) is defined using the Bishop simplified method with a factor of safety equal to unity. Gaussian random field theory is used to generate random realizations of a …

The Tornado Warning Process: A Review Of Current Research, Challenges, And Opportunities, Jerry Brotzge, William Donner

Sociology Faculty Publications

With the unusually violent tornado season of 2011, there has been a renewed national interest, through such programs as NOAA's Weather Ready Nation initiative, to reevaluate and improve our tornado warning process. This literature review provides an interdisciplinary, end-to-end examination of the tornado warning process. Following the steps outlined by the Integrated Warning System, current research in tornado prediction and detection, the warning decision process, warning dissemination, and public response are reviewed, and some of the major challenges for improving each stage are highlighted. The progress and challenges in multi-day to short-term tornado prediction are discussed, followed by an examination …

On Closed Subsets Of Non-Commutative Association Schemes Of Rank 6, Jose Vera

Theses and Dissertations - UTB/UTPA

The notion of an association scheme is a generalization of the concept of a group. In fact, the so-called thin association schemes correspond in a well-understood way to groups. In this thesis, we look at the structure of non-commutative association schemes of rank 6. We will show that a non-normal closed subset of a noncommutative association scheme of rank 6, must have rank 2. The so-called Coxeter schemes of rank 6 which we present in Section 4 provide examples of association schemes of rank 6 with non-normal closed subsets of rank 2. It is shown that normal closed subsets of …

The Catalytic Behaviour Of Nanoag@Montmorillonite Composite Materials, Martina Karlíková, Libor Kvítek, Robert Prucek, Aleš Panáček, Jan Filip, Jirí Pechoušek, Nathaniel F. Adegboyega

Chemistry and Chemical Engineering Faculty Publications

The preparation of nanoAg@montmorillonite composite materials and their catalytic activity is reported in this article. The nanoAg@montmorillonite composite materials were prepared by the adsorption of silver NPs, with an average size about 30 nm, from their aqueous dispersion onto two types of montmorillonite with different chemical composition. Silver NPs were prepared via modified Tollens process, which involves the reduction of [Ag(NH 3)2]+complex cation by maltose. The amount of silver NPs anchored onto the MMT surfaces was determined by UV-VIS spectroscopy; the decrease in absorbance of the dispersion after the adsorption was monitored. Prepared nanocomposite materials were subsequently characterized by means …

Transformative Engagement In Deliberative Democracies: Exploring A Framework For Engagement Using A Creative, Braided Approach, Janell C. Walther

Department of Communication Studies: Dissertations, Theses, and Student Research

Policymakers, scientists, academics, and organizational leaders have long been interested in the best way to engage, persuade, and educate stakeholders, no matter the topic (e.g., Mazer, 2013; Bell et al, 2013). While exploration of information dissemination and presentation is growing (Jones, 2013; Gutkind, 2005), particularly within highly mediatized networked societies (Castells, 2008), the necessity for engaging, persuading, and educating citizens in the public sphere through diverse approaches is increasingly obvious. In particular, it is important and relevant to creatively engage stakeholders and decision-makers in an interactive dialogue to allow for fuller understanding about complex topics, especially in the realm of …

Dg Algebras With Exterior Homology, W. G. Dwyer, J. P.C. Greenlees, Srikanth B. Iyengar

Department of Mathematics: Faculty Publications

We study differential graded algebras (DGAs) whose homology is an exterior algebra over a commutative ring R on a generator of degree n, and also certain types of differential modules over these DGAs. We obtain a complete classification with R = Z or R = F_p and n ≥ –1. The examples are unexpectedly interesting.

Scalar Differential Equation For Slowly-Varying Thickness-Shear Modes In At-Cut Quartz Resonators With Surface Impedance For Acoustic Wave Sensor Application, Huijing He, Jiashi Yang, John A. Kosinski

Department of Mechanical and Materials Engineering: Faculty Publications

For time-harmonic motions, we generalize a 2-D scalar differential equation derived previously by Tiersten for slowly-varying thickness-shear vibrations of AT-cut quartz resonators. The purpose of the generalization is to include the effects of surface acoustic impedance from, e.g., mass layers or fluids for sensor applications. In addition to the variation of fields along the plate thickness, which is considered in the usual 1-D acoustic wave sensor models, the equation obtained also describes in-plane variations of the fields, and therefore can be used to study the vibrations of finite plate sensors with edge effects. The equation is compared with the theory …

Auroral Ion Upflows: Sources, High Altitude Dynamics, And Neutral Wind Effects, Meghan R. Burleigh

Doctoral Dissertations and Master's Theses

Large upwellings of thermal plasma are commonly observed in the high-latitude, topside ionosphere. These auroral ion upflows have a range of potential sources including frictional heating, electron precipitation, neutral winds, and higher-altitude density cavities. The unique signatures and detailed evolution of these upflows are examined through the use of Incoherent Scatter Radar data and a sophisticated ionospheric fluid model.

A survey of solar cycle 23 shows that at Sondrestrom upflows occur most often in the cusp region and midnight auroral zone. Simplified force balance analysis and steady state velocity calculations are applied to a few select events to elucidate the …

Tennessee Farm Bureau News - November 2013, Tennessee Farm Bureau Federation

Tennessee Farm Bureau News

No abstract provided.

Cognitive Apprenticeship And The Supervision Of Science And Engineering Research Assistants, Michelle A. Maher, Joanna A. Gilmore, David F. Feldon, Telesia E. Davis

Instructional Technology and Learning Sciences Faculty Publications

We explore and critically reflect on the process of science and engineering research assistant skill development both within laboratory-based research teams and, when no team is present, whithin the faculty supervisor-research assistant interactions. Using a performance-based measure of research skill development, we identify research assistants who, over the course of an academic year of service as a researcher, markedly developed, modestly developed, or failed to develop their research skills. Interviews with these research assistants and their faculty supervisors, seen through the lens of cognitive apprenticeship, provide insight into this variation. We found that within the contours of supervisory relationships and …

Teachers' Perceptions Of Administrative Support In Incentive Grant Schools, William Crowder

Doctoral Dissertations and Projects

The purpose of this study is to investigate teachers' perceptions of administrative support in incentive grant schools. The primary objective of this study is to determine the effect of participation in an incentive grant on the perceived level of administrative support. The research questions were as follows: 1. Do teachers who are participating in an incentive grant program perceive they have greater support from their supervising administrator than the teachers who are not participating in the incentive grant program within the same secondary schools? 2. Do teachers who have 10 or more years of experience who are participating in an …

Hpv Vaccine Acceptability Among Men: A Systematic Review And Meta-Analysis, Peter A. Newman, Carmen H. Logie, Nick Doukas, Kenta Asakura

School for Social Work: Faculty Publications

Objective To understand rates of human papillomavirus (HPV) vaccine acceptability and factors correlated with HPV vaccine acceptability. Design Meta-Analyses of cross-sectional studies. Data sources We used a comprehensive search strategy across multiple electronic databases with no date or language restrictions to locate studies that examined rates and/or correlates of HPV vaccine acceptability. Search keywords included vaccine, acceptability and all terms for HPV. Review methods We calculated mean HPV vaccine acceptability across studies. We conducted meta-Analysis using a random effects model on studies reporting correlates of HPV vaccine acceptability. All studies were assessed for risk of bias. Results Of 301 identified …

E-Commerce Regulation: Necessity, Futility, Disconnect, Eliza Mik

Research Collection Yong Pung How School Of Law

Existing e-commerce regulations constitute a premature and unnecessary interference in the natural evolution of commercial practices and technologies. I question not just their quality, mainly attributable to the technological ignorance of the regulator, but their very necessity. I observe the practical futility of drafting effective regulatory instruments in areas subject to continuous and unpredictable technological change. I criticize the overly homogenous approach to "everything Internet" (i.e. everything involving the Internet requires new law) as well as the creation of new regulatory spheres and legal categories. Some might claim that it is too early for a critical retrospective of this subject. …

2013 Scholarly Productivity Report, Missouri University Of Science And Technology

Civil, Architectural and Environmental Engineering Scholarly Productivity Reports

No abstract provided.

Taxation, Craig D. Bell

University of Richmond Law Review

The overall purpose of this article is to provide Virginia tax and general practitioners with a concise overview of the recent developments in Virginia taxation that will most likely impact those practitioners. This article does not, however, discuss many of the numerous technical legislative changes to title 58.1 of the Virginia Code, which covers taxation.

Bilingual And Esl Pre-Service Teachers Learn About Effective Instruction For Ells Through Meaningful Collaboration, Alma D. Rodríguez

Bilingual and Literacy Studies Faculty Publications

This article presents the results of a study conducted to identify the perceptions of bilingual and ESL pre-service teachers regarding the integration of a collaborative service learning project in a key course of their teacher preparation program. Pre-, process, and final reflective essays were written by participants as they engaged in the development of an ESL unit to teach language through content to ELLs. The analysis of participants’ reflections revealed that preservice teachers connect the learning they acquire in their teacher education program with their life experiences, which contributes to their identity formation as prospective teachers of ELLs. In addition, …