Digital Commons Network^™

Intrasubject Variability In Power Reflectance, Defne Abur, Susan E. Voss, Nicholas J. Horton

Engineering: Faculty Publications

Background: Power reflectance measurements are an active area of research related to the development of noninvasive middle-ear assessment methods. There are limited data related to test-retest measures of power reflectance.

Purpose: This study investigates test-retest features of power reflectance, including comparisons of intrasubject versus intersubject variability and how ear-canal measurement location affects measurements.

Research Design: Repeated measurements of power reflectance were made at about weekly intervals. The subjects returned for four to eight sessions. Measurements were made at three ear-canal locations: a deep insertion depth (with a foam plug flush at the entrance to the ear canal) and both …

Understanding The Times: A Causal/Comparative Study Of The Effectiveness Of A Christian Worldview Curriculum In Helping Students Develop A Christian Worldview, Donald Barrows

Doctoral Dissertations and Projects

Christian educators are concerned about the development of a Christian worldview in their students. They also desire that their students maintain that worldview after graduation. In this study, the author attempts to determine the effectiveness of the Understanding the Times Christian worldview curriculum in helping students develop a Christian worldview. To do this, a causal/comparative research design was used as participants took a worldview test to determine the extent to which their worldviews compared with biblical teachings. The researcher sampled a random sample of Christian high school graduates who have taken the yearlong Understanding the Times Christian worldview course at …

Separated Response Function Ratios In Exclusive, Forward Π± Electroproduction, G. M. Huber, H. P. Blok, C. Butuceanu, D. Gaskell, T. Horn, D. J. Mack, D. Abbott, A. Klein, L. M. Qin, K. Vansyoc

Physics Faculty Publications

The study of exclusive π^± electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio R-L=sigma(pi-)(L) / sigma(pi+)(L) is sensitive to isoscalar contamination to the dominant isovector pion exchange amplitude, which is the basis for the determination of the charged pion form factor from electroproduction data. A change in the value of R-T=sigma(pi-)(L) / sigma(pi+)(L) from unity at small -t, to 1/4 at large -t, would suggest a transition from coupling to a (virtual) pion to coupling to individual quarks. Furthermore, the mentioned ratios may show an earlier …

A Study Of Personal Cloud Computing: Compatibility, Social Influence, And Moderating Role Of Perceived Familiarity, Murad Moqbel, Valerie L. Bartelt, Mohammed Al-Suqri

Information Systems Faculty Publications

Building on a research framework based on the Theory of Reasoned Action (TRA), Innovation Diffusion Technology (IDT), and the Technology Adoption Model (TAM), we propose a model integrating compatibility, social influence, and perceived familiarity given the implicit uncertainty of personal cloud. Our model emphasizes the moderating effect of perceived familiarity on the relationships between both perceived compatibility and social influence on behavioral intention. PLS-based structural equation modeling is employed to test the related propositions empirically. Results from a survey, involving 265 university students, reveal that perceived compatibility explains a larger proportion of the variance in behavioral intention; perceived familiarity plays …

Smooth Peano Functions For Perfect Subsets Of The Real Line, Krzysztof Ciesielski

Faculty & Staff Scholarship

In this paper we investigate for which closed subsets P of the real line R there exists a continuous map from P onto P 2 and, if such a function exists, how smooth can it be. We show that there exists an infinitely many times differentiable function f : R → R 2 which maps an unbounded perfect set P onto P 2 . At the same time, no continuously differentiable function f : R → R 2 can map a compact perfect set onto its square. Finally, we show that a disconnected compact perfect set P admits a continuous …

Nowhere-Zero 3-Flows In Signed Graphs, Yezhou Wu, Dong Ye, Wenan Zang, Cun-Quan Zhang

Faculty & Staff Scholarship

Tutte observed that every nowhere-zero $k$-flow on a plane graph gives rise to a $k$-vertex-coloring of its dual, and vice versa. Thus nowhere-zero integer flow and graph coloring can be viewed as dual concepts. Jaeger further shows that if a graph $G$ has a face-$k$-colorable 2-cell embedding in some orientable surface, then it has a nowhere-zero $k$-flow. However, if the surface is nonorientable, then a face-$k$-coloring corresponds to a nowhere-zero $k$-flow in a signed graph arising from $G$. Graphs embedded in orientable surfaces are therefore a special case that the corresponding signs are all positive. In this paper, we prove …

Experimental Observation Of Extreme Multistability In An Electronic System Of Two Coupled Rössler Oscillators, Mitesh S. Patel, Unnati Patel, Abhijit Sen, Gautam C. Sethia, Chittaranjan Hens, Syamal K. Dana, Ulrike Feudel, Kenneth Showalter, Calistus N. Ngonghala, Ravindra E. Amritkar

Faculty & Staff Scholarship

We report the first experimental observation of extreme multistability in a controlled laboratory investigation. Extreme multistability arises when infinitely many attractors coexist for the same set of system parameters. The behavior was predicted earlier on theoretical grounds, supported by numerical studies of models of two coupled identical or nearly identical systems. We construct and couple two analog circuits based on a modified coupled Rössler system and demonstrate the occurrence of extreme multistability through a controlled switching to different attractor states purely through a change in initial conditions for a fixed set of system parameters. Numerical studies of the coupled model …

Accretion Disks Around Binary Black Holes Of Unequal Mass: General Relativistic Magnetohydrodynamic Simulations Near Decoupling, Roman Gold, Vasileios Paschalidis, Zachariah B. Etienne, Stuart L. Shapiro, Harald P. Pfeiffer

Faculty & Staff Scholarship

No abstract provided.

Accretion Disks Around Binary Black Holes Of Unequal Mass: General Relativistic Mhd Simulations Of Postdecoupling And Merger, Roman Gold, Vasileios Paschalidis, Milton Ruiz, Stuart L. Shapiro, Zachariah B. Etienne, Harald P. Pfeiffer

Faculty & Staff Scholarship

We report results from simulations in general relativity of magnetized disks accreting onto merging black hole binaries, starting from relaxed disk initial data. The simulations feature an effective, rapid radiative cooling scheme as a limiting case of future treatments with radiative transfer. Here we evolve the systems after binary-disk decoupling through inspiral and merger, and analyze the dependence on the binary mass ratio with $q\equiv m_{\rm bh}/M_{\rm BH}=1,1/2,$ and $1/4$. We find that the luminosity associated with local cooling is larger than the luminosity associated with matter kinetic outflows, while the electromagnetic (Poynting) luminosity associated with bulk transport of magnetic …

Accurate And Efficient Waveforms For Compact Binaries On Eccentric Orbits, E. A. Huerta, Prayush Kumar, Sean T. Mcwilliams, Richard O’Shaughnessy, Nicolás Yunes

Faculty & Staff Scholarship

Compact binaries that emit gravitational waves in the sensitivity band of ground-based detectors can have non-negligible eccentricities just prior to merger, depending on the formation scenario. We develop a purely analytic, frequency-domain model for gravitational waves emitted by compact binaries on orbits with small eccentricity, which reduces to the quasi-circular post-Newtonian approximant TaylorF2 at zero eccentricity and to the post-circular approximation of Yunes et al. (2009) at small eccentricity. Our model uses a spectral approximation to the (post-Newtonian) Kepler problem to model the orbital phase as a function of frequency, accounting for eccentricity effects up to ${\cal{O}}(e^8)$ at each post-Newtonian …

Measuring And Using Light In The Melanopsin Age., Robert J Lucas, Stuart N Peirson, David M Berson, Timothy M Brown, Howard M Cooper, Charles A Czeisler, Mariana G Figueiro, Paul D Gamlin, Steven W Lockley, John B O'Hagan, Luke L A Price, Ignacio Provencio, Debra J Skene, George C Brainard

Department of Neurology Faculty Papers

Light is a potent stimulus for regulating circadian, hormonal, and behavioral systems. In addition, light therapy is effective for certain affective disorders, sleep problems, and circadian rhythm disruption. These biological and behavioral effects of light are influenced by a distinct photoreceptor in the eye, melanopsin-containing intrinsically photosensitive retinal ganglion cells (ipRGCs), in addition to conventional rods and cones. We summarize the neurophysiology of this newly described sensory pathway and consider implications for the measurement, production, and application of light. A new light-measurement strategy taking account of the complex photoreceptive inputs to these non-visual responses is proposed for use by researchers, …

Improved Moving Puncture Gauge Conditions For Compact Binary Evolutions, Zachariah B. Etienne, John G. Baker, Vasileios Paschalidis, Bernard J. Kelly, Stuart L. Shapiro

Faculty & Staff Scholarship

No abstract provided.

Mate Choice And The Evolutionary Stability Of A Fixed Threshold In A Sequential Search Strategy, Raymond Cheng, Steven M. Seubert, Daniel D. Wiegmann

Mathematics & Statistics Faculty Publications

The sequential search strategy is a prominent model of searcher behavior, derived as a rule by which females might sample and choose a mate from a distribution of prospective partners. The strategy involves a threshold criterion against which prospective mates are evaluated. The optimal threshold depends on the attributes of prospective mates, which are likely to vary across generations or within the lifetime of searchers due to stochastic environmental events. The extent of this variability and the cost to acquire information on the distribution of the quality of prospective mates determine whether a learned or environmentally canalized threshold is likely …

Length Effects Of A Built-In Flapping Flat Plate On The Flow Over A Traveling Wavy Foil, Nansheng Liu, Yan Peng, Xiyun Lu

Mathematics & Statistics Faculty Publications

Flow over the traveling wavy foil with a built-in rigid flapping plate at its trailing edge has been numerically studied using the multi-relaxation-time Lattice Boltzmann method and immersed boundary method. The effect of the plate length on the propulsive performance such as the thrust force, energy consumption, and propeller efficiency has been investigated. Three modes (body force dominated, body and tail force competing and tail force dominated modes) have been identified that are associated with different hydrodynamics and flow structures. It is revealed that there exists a better performance plate length region and, within this region, a high propeller efficiency …

Network-Based Assessments Of Percolation-Induced Current Distributions In Sheared Rod Macromolecular Dispersions, Feng Shi, Simi Wang, M. Gregory Forest, Peter J. Mucha, Ruhai Zhou

Mathematics & Statistics Faculty Publications

Conducting high-aspect-ratio rods with 1-10 nm-scale diameters dispersed in poorly conducting matrices at extremely low, O(1%), volume fractions induce dramatic gains in bulk conductivity at rod percolation threshold. Experimentally [Nan, Shen, and Ma, Annu. Rev. Mater. Res., 40 (2010), pp. 131-151], bulk conductivity abandons the prepercolation, linear scaling with volume fraction that follows from homogenization theory [Zheng et al., Adv. Funct. Mater., 15 (2005), pp. 627-638], and then postpercolation jumps orders of magnitude to approach that of the pure rod macromolecular phase as predicted by classical percolation theory [Stauffer and Aharony, Introduction to Percolation Theory, CRC …

Outlook Magazine, Autumn 2014

Outlook Magazine

No abstract provided.

An Analysis Of The Problem Solving Skills Of Children Who Are Deaf Or Hard Of Hearing, Angelina T.G. Laurent

Independent Studies and Capstones

Literature Review: Problem-solving skills are important to reasoning through everyday situations, and underlie social competence and academic achievement. Cognitive skills such as theory of mind and executive function contribute to problem-solving ability. Children who are deaf or hard of hearing often present with delays in these areas. Data Analysis: Data for 10 students who are deaf or hard of hearing who were administered the Test of Problem Solving – Elementary, Third Edition is analyzed. Results: Problem-solving abilities of students who are deaf or hard of hearing tend to fall on the lower end of the average range, where the average …

Teachers' Perceptions Of The Effectiveness Of The Art Education Preparation Program In Kuwait, Ghadeer Alhaddad

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was designed to investigate how pre-service, beginners, and advanced art teachers in Kuwait viewed their teacher preparation program by describing and evaluating its effectiveness. To examine the issues of art teacher training and current teaching, this study used quantitative and qualitative research approaches. The study included a qualitative document analysis and a quantitative survey questionnaire of pre-service art education teachers who have completed their classroom observation at the end of the fourth year at the College of Basic Education (CBE), beginning art education teachers who are teaching in the first of their second year at the Ministry of …

Detecting The Influence Of Best Management Practices On Vegetation Near Ephemeral Streams With Landsat Data, Matthew Rigge, Alexander Smart, Bruce Wylie, Kendall De Van Kamp

Natural Resource Management Faculty Publications

Various best management practices (BMPs) have been implemented on rangelands with the goals of controlling nonpoint sourcepollution, reducing the impact of livestock in ecologically important riparian areas, and improving grazing distribution.Providing off-stream water sources to livestock in pastures, cross-fencing, and rotational grazing are common rangeland BMPsthat have demonstrated success in drawing livestock grazing pressure away from streams. We evaluated the effects of rangelandBMP implementation with six commercial-scale pastures in the northern mixed-grass prairie. Four pastures received a BMPsuite consisting of off-stream water, cross-fencing, and deferred-rotation grazing, and two pastures did not receive BMPs. Wehypothesized that the BMPs increased the quantity …

Does Male Circumcision Prevent Herpes Simplex Virus Type 2 In Sexually Active Males Aged 18-50?, Mary K. Macon

PCOM Physician Assistant Studies Student Scholarship

OBJECTIVE: The objective of this selective EBM review is to determine whether or not male circumcision prevents herpes simplex virus type 2 (“HSV-2”) in sexually active males aged 18- 50.

STUDY DESIGN: Review of three English language primary studies published in 2009 and 2012.

DATA SOURCES: Three randomized control trials analyzing the intervention of circumcision to prevent HSV-2 in sexually active males found using Medline and PubMed.

OUTCOMES MEASURED: The main clinical outcome in all studies measured the incidence of HSV-2 defined as a sexually transmitted infection with symptoms of visible genital ulceration. The outcomes were …

Microlectures In A Flipped Classroom: Application, Creation And Resources, Dawn Sweet

Mid-Western Educational Researcher

Using microlectures in a flipped classroom is a growing trend. In this media review, the benefits of microlectures for such classrooms are discussed, including how they can be used to help students become more responsible for their learning, as well as how they can be used by teachers to provide differentiated instruction. A list of resources for creating microlectures is included.

Response To Intervention In Illinois: An Exploration Of School Professionals’ Attitudes And Beliefs, Amy Feiker Hollenbeck, Eva Patrikakou

Mid-Western Educational Researcher

The present study examines school professionals’ self-reported perceptions of readiness in relation to the implementation of Response to Intervention (RTI) following a mandated deadline across the state of Illinois, as well their beliefs about the framework. A survey was developed to measure variables in the model related to school professionals’ training and levels of confidence about various aspects of RTI. Results indicate that the model applied differently to school psychologists and other school professionals, explaining 64% and 66%, respectively, of the variance in perceiving RTI as a beneficial change. While there were differences in the number and type of variables …

Principal And Mathematics Coaches' Journey To Improve Mathematics Learning, R. Cox

Journal of Mathematics and Science: Collaborative Explorations

My educational career path began as an elementary school teacher, then as an assistant principal, and now as a principal. With the educational experiences that I had at each level of my career, I was certain I would be able to handle an increase in the mathematical rigor presented to our students through the new Mathematics Standards of Learning for Virginia Public Schools (SOL) [1]. I found that, yes, I was able to understand the rigor. However, I found the challenge was providing the needed assistance to bring about results that would ultimately help our teachers and students be successful. …

Just Harry, Lily Anderson

Honors College Student Publications

This book chapter written by Purdue University Honors College student, Lily Anderson, is a contribution to Bross, Kristina, "Little Else Than a Memory: Purdue Students Search for the Class of 1904" (2014). Scholarly Publishing Services e-Books. Book 8. http://docs.lib.purdue.edu/sps_ebooks/8.

"The External Feminine": An Examination Of The Life And Times Of The Twentieth-Century New University Woman Through Cecil Clare Crane, Cedar Marie Woodworth

Honors College Student Publications

This book chapter written by Purdue University Honors College student, Cedar Marie Woodworth, is a contribution to Bross, Kristina, "Little Else Than a Memory: Purdue Students Search for the Class of 1904" (2014). Scholarly Publishing Services e-Books. Book 8. http://docs.lib.purdue.edu/sps_ebooks/8.

Computational Design And Characterization Of Silicene Nanostructures For Electrical And Thermal Transport Applications, Tim H. Osborn

Browse all Theses and Dissertations

Novel silicene-based nanomaterials are designed and characterized by first principle computer simulations to assess the effects of adsorptions and defects on stability, electronic, and thermal properties. To explore quantum thermal transport in nanostructures a general purpose code based on Green's function formalism is developed.

Specifically, we explore the energetics, temperature dependent dynamics, phonon frequencies, and electronic structure associated with lithium chemisorption on silicene. Our results predict the stability of completely lithiated silicene sheets (silicel) in which lithium atoms adsorb on the atom-down sites on both sides of the silicene sheet. Upon complete lithiation, the band structure of silicene is transformed …

Thin Film Growth Of Dielectric Materials By Pulsed Laser Deposition, Jason Christopher Anders

Browse all Theses and Dissertations

Thin films of Sr_yCa_1-yZr_1-xTi_xO₃ (SCZT) with x = 0.8, y = 0.01, CaHf_1-xTi_xO₃ (CHT) with x = 0.8, and _xBiScO₃ - (1-x) BaTiO₃ with x = 0.36 (BSBT(36/64)) showing a high permittivity are useful both in capacitor applications. These dielectric thin films with a SrRuO₃ (SRO) conductive bottom electrodes were prepared by using pulsed laser deposition on <100< La_0.3Sr_0.7Al_0.65Ta_0.35O₃ (LSAT) single crystal substrates. In a search of optimal conditions to achieve epitaxially grown SCZT, CHT, …

Effect Of Rivers On Groundwater Temperature In Heterogeneous Buried-Valley Aquifers: Extent, Attenuation, And Phase Lag Of Seasonal Variation, Nathan Lee Young

Browse all Theses and Dissertations

The temperature of groundwater in aquifers is relatively stable when compared to the water temperature in surface-water bodies. However, in aquifers that are hydraulically connected to rivers that have water flux into the aquifer, the local aquifer temperature can show seasonal variation. This project focused on the thermally-altered, near-river zone of such an aquifer, and used numerical methods to examine the extent of seasonal variation in temperature into the aquifer, and the attenuation and phase shift of the signal with distance from the river. The results show that the extent of alteration by diffusive heat flow is negligible compared to …

Binding And Entry Mechanisms Of Adenovirus In Polarized Epithelial Cells, Trisha Lynn Brockman

Browse all Theses and Dissertations

Adenovirus's primary receptor, the Coxsackievirus and adenovirus receptor (CAR), has two transmembrane isoforms with differential localization within polarized epithelial cells (CAREx7 (basolateral), CAREx8 (apical)). I hypothesized that each isoform of CAR is degraded at different rates and is regulated by Src-family kinases. Increasing or decreasing the concentration of CAR is predicted to directly alter adenoviral entry. To test this hypothesis, inducible Madin Darby Canine Kidney (MDCK) cell lines either expressing CAREx7, CAREx8, or mCherry, under a doxycycline-inducible promoter were used in pulse-chase structured experiments to calculate the half-lives of these proteins. Alternatively, a polarized model lung epithelium (CaLu-3) treated with …

Development Of A Student Self-Reported Instrument To Assess Course Reform, R.C. Morris, Loran Carleton Parker, David Nelson, Matthew D. Pistilli, Adam Hagen, Chantal Levesque-Bristol, Gabriela Weaver

IMPACT Publications

This study examines the development and implementation of a survey-based instrument assessing the effectiveness of a course redesign initiative focused on student centeredness at a large midwestern university in the United States. Given the scope of the reform initiative under investigation in this study, researchers developed an instrument called the Classroom Experience Questionnaire (CEQ), which was administered to students enrolled in redesigned courses. Early findings demonstrate strong construct validity and internal reliability of the CEQ instrument as well as concurrent validity between the CEQ and observation data gathered in concert with self-report data. The authors conclude that in the absence …