Physical Sciences and Mathematics Commons^™

Applying The Component Display Theory To The Instructional Design And Development Of An Educational Mobile Application, Trelisa Glazatov

CCE Theses and Dissertations

Mobile technologies present an opportunity for scholars and practitioners to extend the application of instructional design theories and models to a mobile learning environment. The goal was to examine mobile learning design and development issues, validate and extend the instructional design theory, Component Display Theory (CDT), to the development of mobile learning activities, and recommend guiding principles for mobile learning system development.

Using a formative research approach, which focuses on improving design theory for instructional practices and processes, CDT was used to design a tutorial mobile application targeting faculty professional development. This design instance was formatively evaluated to determine how …

Motivation And Learning Of Non-Traditional Computing Education Students In A Web-Based Combined Laboratory, Michael Jesse Green

CCE Theses and Dissertations

Hands-on experiential learning activities are an important component of computing education disciplines. Laboratory environments provide learner access to real world equipment for completing experiments. Local campus facilities are commonly used to host laboratory classes. While campus facilities afford hands-on experience with real equipment high maintenance costs, restricted access, and limited flexibility diminish laboratory effectiveness. Web-based simulation and remote laboratory formats have emerged as low cost options, which allow open access and learner control. Simulation lacks fidelity and remote laboratories are considered too complex for novice learners.

A web-based combined laboratory format incorporates the benefits of each format while mitigating the …

Math In The Dark: Tools For Expressing Mathematical Content By Visually Impaired Students, Patricia M. Mcdermott-Wells

CCE Theses and Dissertations

Blind and visually impaired students are under-represented in the science, technology, engineering, and mathematics disciplines of higher education and the workforce. This is due primarily to the difficulties they encounter in trying to succeed in mathematics courses. While there are sufficient tools available to create Braille content, including the special Nemeth Braille used in the U.S. for mathematics constructs, there are very few tools to allow a blind or visually impaired student to create his/her own mathematical content in a manner that sighted individuals can use. The software tools that are available are isolated, do not interface well with other …

Security Frameworks For Machine-To-Machine Devices And Networks, Michael Demblewski

CCE Theses and Dissertations

Attacks against mobile systems have escalated over the past decade. There have been increases of fraud, platform attacks, and malware. The Internet of Things (IoT) offers a new attack vector for Cybercriminals. M2M contributes to the growing number of devices that use wireless systems for Internet connection. As new applications and platforms are created, old vulnerabilities are transferred to next-generation systems. There is a research gap that exists between the current approaches for security framework development and the understanding of how these new technologies are different and how they are similar. This gap exists because system designers, security architects, and …

Motivating The Solicited And Unsolicited Sharing Of Tacit Knowledge Through The Process Of Externalization, Sheila Yvonne Sorensen

CCE Theses and Dissertations

While several U. S. firms have invested in Knowledge Management (KM) tools and software, it has become apparent that investments must be made in additional facets of KM, such as knowledge sharing (KS), thought by many researchers to be the most important component of KM. Of the two types of KS, explicit and tacit, the sharing of tacit knowledge has been shown to contribute the most to an organization’s performance. However, since tacit knowledge is difficult to both convey and acquire, this unshared tacit knowledge may ultimately harm an organization when, without the appropriate knowledge, individuals cannot effectively perform their …

Implicit Measures And Online Risks, Lucinda W. Wang

CCE Theses and Dissertations

Information systems researchers typically use self-report measures, such as questionnaires to study consumers’ online risk perception. The self-report approach captures the conscious perception of online risk but not the unconscious perception that precedes and dominates human being’s decision-making. A theoretical model in which implicit risk perception precedes explicit risk evaluation is proposed. The research model proposes that implicit risk affects both explicit risk and the attitude towards online purchase. In a direct path, the implicit risk affects attitude towards purchase. In an indirect path, the implicit risk affects explicit risk, which in turn affects attitude towards purchase.

The stimulus used …

Uncertainty Quantification Of Turbulence Model Closure Coefficients For Transonic Wall-Bounded Flows, John Anthony Schaefer

Masters Theses

"The goal of this work was to quantify the uncertainty and sensitivity of commonly used turbulence models in Reynolds-Averaged Navier-Stokes codes due to uncertainty in the values of closure coefficients for transonic, wall-bounded flows and to rank the contribution of each coefficient to uncertainty in various output flow quantities of interest. Specifically, uncertainty quantification of turbulence model closure coefficients was performed for transonic flow over an axisymmetric bump at zero degrees angle of attack and the RAE 2822 transonic airfoil at a lift coefficient of 0.744. Three turbulence models were considered: the Spalart-Allmaras Model, Wilcox (2006) k-ω Model, and the …

Haverstraw Bay Benthic Mapping Project Gis Data, Robert M. Cerrato

SoMAS Research Data

High-resolution backscatter and bathymetric maps created by multibeam and sidescan sonar surveys were used to identify five different seafloor bottom types within Haverstraw Bay. Grab samples were collected within these areas to characterize sediment properties and macrofauna. Selected sampling locations were revisited and seafloor images were obtained with an HD underwater camera. Multivariate analysis was used to identify the most important factors explaining variations in community structure. Results indicated that categorical variables defining bottom types, grain size, and water depth can explain about 42% of community structure variation. In addition, shell length data collected for Rangia cuneata, an introduced species, …

Desktop Study Report : Linking Management Of Natural Coastal Resources To Socioeconomic Development, Henrik Nilsson, Dariusz P. Fey, Piotr Margonski, Michael Van Laak, Nardine Stybel

HERRING

The HERRING Desktop Study Report links management of natural coastal resources to socioeconomic development.

Cappack Devices For Enhanced Qnmr Measurements In 1H Nmr Spectroscopy, Lingyu Chi

Masters Theses

"Quantitative NMR analyses can be improved by adding well-defined external references for measuring sample properties on absolute scales. Special Capillary-tube Package (CapPack) devices were invented that provide in situ information (e.g., temperature, pH, pressure, integration, chemical shift, lock, etc.) about a sample with spectral imprimaturs. A new microscale glass-sealing technique produced CapPack devices that can survive high temperatures and pressures in harsh environments. Two CapPack devices are discussed: (1) Gradient CapPack-- a device for examining the irradiation bandwidth of solvent-suppression pulse sequences; (2) T₁ CapPack - a device for examining the T₁ robustness of solvent-suppression pulse sequences. A …

The Update, January/February 2015, University Of Northern Iowa. College Of Humanities, Arts And Sciences.

Update

Inside this issue:

-- FORTEPAN Iowa: UNI Professors Collaborate to Build a Digital Database of Iowa Photographs

-- Department News

-- School of Music Events
-- Theatre UNI Spring 2015 Shows
-- Yager Awards: Annual Yager Awards Event Yields a Memorable Experience
-- Alumni Spotlight: Technology: Greg Smith
-- Alumni Spotlight: Department of Communication Sciences and Disorders: Jamie Flatness
-- Student Spotlight: Department of Mathematics: Jacob Snyder
-- Featured Organization: Philosophy Club, Department of Philosophy and World Religions
-- Student Spotlight: Department of Art: Justin Allen
-- Student Spotlight: Department of Music: Malcolm Burke
-- Featured Organization: Women in Computing, …

The Wright Message, 2015-2016, University Of Northern Iowa. Department Of Mathematics.

The Wright Message

Inside this issue:

-- Dear Alumni and Friends
-- Dr. Edward Rathmell retires from UNI
-- 2015 Hari Shankar Lecture
-- Around Wright Hall
-- Congratulations to....
-- Faculty Highlights
-- Student News
-- 2015-2016 Tenure-Stream Faculty
-- Alumni Spotlight: Clayton Edwards & Mary Theilen
-- Department Interviews: Adrienne Stanley, Joel Haack, , Benjamin Castle & Suzanne Shontz
-- UNI Students Travel to Korea
-- Trijitzsky Scholarship Winner Emily Wardenburg
-- Student Spotlights: Amber Irlmeier, Britney Bockstahler, Derek Hofland & Julia Robinson
-- PAEMST Award Winner Allysen Lovstuen
-- Donor Spotlight: Alan and Barbara Hubbard
-- News fro KME
-- …

Mutagenic Studies Of A Unique Cysteine Ligase Enzyme, Emily David, Paul Cook

Student Summer Scholars Manuscripts

BshC is the final enzyme in a three step pathway for the synthesis of bacillithiol, a compound that enables resistance to fosfomycin in Gram-positive bacteria. BshC is unique from other enzymes of its kind because of an additional ADP binding site and inactivity when studied in the laboratory. To explore BshC function, several site-directed mutants have been selected within the ADP binding pocket. Fluorescence assays have been utilized on the wild-type BshC and one mutant, Y510Q. We determined that Y510Q does not bind ATP as effectively as wild-type BshC. These fluorescence assays will be utilized on W506L, E384A, and H386A …

The Effects Of Invasive Earthworm Species On Salamanders In The Grand Valley State University Ravine Ecosystem, Hunter J. Brunges, James Dunn

Student Summer Scholars Manuscripts

Earthworms are an invasive species that are causing ecological damage to northern forest ecosystems. The disruption to soil nutrient cycling and litter decomposition can negatively impact organisms that live within the leaf litter, such as salamanders. To test this hypothesis, we sampled earthworms within three ravines at thirty-six sites using the mustard extraction method. We surveyed salamander populations on two dates in 2015 at each site using cover boards. We also collected data on slope aspect, altitude, soil moisture, leaf litter coverage, canopy cover, and coarse woody debris at each site to determine their effects on earthworm and salamander populations. …

Communiqué: College Of Humanities, Arts & Sciences Alumni Magazine,Volume 4, Winter 2015, University Of Northern Iowa. College Of Humanities, Arts, And Sciences.

Communiqué: College of Humanities, Arts & Sciences Alumni Magazine

Inside this issue:

-- Dean's Message
-- Harlem Hellfighters
-- American Panthers in London
-- Little Free Libraries
-- Special Olympic Torch
-- Vertigo A-GoGo
-- World of Kurt Vonnegut
-- Donor Feature Regina Neville
-- CHAS Applause
-- News in Short
-- A New Learning Environment
-- Castle in Budapest
-- INSPIRE
-- Sixteen Strong: NCUR
-- Biology Living and Learning Community
-- Yager Award
-- Roboshop
-- Students in the news
-- Transitions
-- Book Nook
-- Donor Feature Gerald Intemann
-- Dean's Fund Donor Listing
-- Alumni News

A Comparison Of Management Strategies For The Federally Endangered Running Buffalo Clover (Trifolium Stoloniferum) On The Blue Grass Army Depot, Ky, Alexi David Dart-Padover

Online Theses and Dissertations

Running buffalo clover (Trifolium stoloniferum) is a federally endangered plant that appears to depend on habitat disturbance, although proposed management strategies such as cattle grazing, mowing, and herbicide application have never been compared in a controlled study. We evaluate the efficacy of these techniques on the Blue Grass Army Depot (BGAD) in Madison County, KY, where one of T. stoloniferum’s largest populations occurs. Fifty-nine patches of T. stoloniferum on the BGAD were treated annually between 2012 and 2014 with combinations of mowing and grass-specific herbicide. Patches of T. stoloniferum also were exposed to one of three types of cattle exposure …

Non-Simplicial Decompositions Of Betti Diagrams Of Complete Intersections, Courtney Gibbons, Jack Jeffries, Sarah Mayes-Tang, Claudiu Raicu, Branden Stone, Bryan White

Articles

We investigate decompositions of Betti diagrams over a polynomial ring within the framework of Boij-Soederberg theory. That is, given a Betti diagram, we decompose it into pure diagrams. Relaxing the requirement that the degree sequences in such pure diagrams be totally ordered, we are able to define a multiplication law for Betti diagrams that respects the decomposition and allows us to write a simple expression of the decomposition of the Betti diagram of any complete intersection in terms of the degrees of its minimal generators. In the more traditional sense, the decomposition of complete intersections of codimension at most 3 …

Few-Layer Titanium Trisulfide (Tis3) Field-Effect Transistors, Alexey Lipatov, Peter M. Wilson, Mikhail Shekhirev, Jacob D. Teeter, Ross Netusil, Alexander Sinitskii

Chemistry Department: Faculty Publications

Titanium trisulfide (TiS₃) is a promising layered semiconductor material. Several-mm-long TiS₃ whiskers can be conveniently grown by the direct reaction of titanium and sulfur. In this study, we exfoliated these whiskers using the adhesive tape approach and fabricated few-layer TiS₃ field-effect transistors (FETs). The TiS₃ FETs showed an n-type electronic transport with roomtemperature field-effect mobilities of 18-24 cm²V^-1s^-1 and ON/OFF ratios up to 300. We demonstrate that TiS₃ is compatible with the conventional atomic layer deposition (ALD) procedure for Al₂O₃. ALD of alumina on TiS3 …

Fluctuations In A Quasi-Stationary Shallow Cumulus Cloud Ensemble, M. Sakradzija, Axel Seifert, Thijs Heus

Physics Faculty Publications

We propose an approach to stochastic parameterisation of shallow cumulus clouds to represent the convective variability and its dependence on the model resolution. To collect information about the individual cloud lifecycles and the cloud ensemble as a whole, we employ a large eddy simulation (LES) model and a cloud tracking algorithm, followed by conditional sampling of clouds at the cloud-base level. In the case of a shallow cumulus ensemble, the cloud-base mass flux distribution is bimodal, due to the different shallow cloud subtypes, active and passive clouds. Each distribution mode can be approximated using a Weibull distribution, which is a …

Smooth Positive Solutions To An Elliptic Model With C2 Functions, Joon Hyuk Kang

Faculty Publications

Two species of animals are competing or cooperating in the same environment. Under what conditions do they coexist peacefully? Or under what conditions does either one of the two species become extinct, that is, is either one of the two species excluded by the other? We investigate this phenomena in mathematical point of view.

In this paper we concentrate on coexistence solutions of the competition or cooperation model

This system is the general model for the steady state of a competitive or cooperative interacting system depending on growth conditions for and . The techniques used in this paper are elliptic …

A Curve Satisfying T/K=S With Constant K>0, Yun Myung Oh, Ye Lim Seo

Faculty Publications

In the present paper, we investigate a space curve in which the curvature is constant and the torsion is a linear function. The aim of this paper is to find an explicit formula for this space curve when the ratio of the torsion to the curvature is a linear function when the curvature is constant.

Two Compact Incremental Prime Sieves, Jonathan P. Sorenson

Scholarship and Professional Work - LAS

A prime sieve is an algorithm that finds the primes up to a bound n. We say that a prime sieve is incremental, if it can quickly determine if n+1 is prime after having found all primes up to n. We say a sieve is compact if it uses roughly √n space or less. In this paper, we present two new results.

• We describe the rolling sieve, a practical, incremental prime sieve that takes O(n log log n) time and O(√n log n) bits of space.

• We also …

Four Color Observations Of 2501 Lohja, Bin Li, Haibin Zhao, Hao Lu, Xianming Han

Scholarship and Professional Work - LAS

Photometric studies of asteroid 2501 Lohja were made between 2014 June 24 and 25 using the Southeastern Association for Research in Astronomy (SARA) Kitt Peak telescope with Bessell B, V, R and I filters. We obtained a synodic period of 3.81 ± 0.01h, which is consistent with previous values.

Rational Maps Of Cp^2 With No Invariant Foliation, Scott R. Kaschner, Rodrigo A. Perez, Roland K.W. Roeder

Scholarship and Professional Work - LAS

We present simple examples of rational maps of the complex projective plane with equal first and second dynamical degrees and no invariant foliation.

Superstable Manifolds Of Invariant Circles And Codimension-One Böttcher Functions, Scott R. Kaschner, Roland K.W. Roeder

Scholarship and Professional Work - LAS

Let f:X ⇢ X be a dominant meromorphic self-map, where X is a compact, connected complex manifold of dimension n>1. Suppose that there is an embedded copy of P1 that is invariant under f, with f holomorphic and transversally superattracting with degree a in some neighborhood. Suppose that f restricted to this line is given by z↦zb, with resulting invariant circle S. We prove that if a≥b, then the local stable manifold Wsloc(S) is real analytic. In fact, we state and prove a suitable localized version that can be useful in wider contexts. We then show that the condition …

Design Of A Novel Low - Cost, Portable, 3d Ultrasound System With Extended Imaging Capabilities For Point-Of-Care Applications, Michail Tsakalakis

Browse all Theses and Dissertations

Ultrasound Imaging (USI) or Medical Sonography (MS), as it is formally called, has been widely used in biomedical applications over the last decades. USI can provide clinicians with a thorough view of the internal parts of the human body, making use of sound waves of higher frequencies than humans can perceive. USI systems are considered highly portable and of low-cost, compared to other imaging modalities. However, despite those advantages, Ultrasound Systems (US) and especially 3D ones, have not been yet extensively utilized for Point-of-Care (POC) applications, due to numerous restrictions and artifacts that they currently present.

Hardware complexity and real-time …

Mining Behavior Of Citizen Sensor Communities To Improve Cooperation With Organizational Actors, Hemant Purohit

Browse all Theses and Dissertations

Web 2.0 (social media) provides a natural platform for dynamic emergence of citizen (as) sensor communities, where the citizens generate content for sharing information and engaging in discussions. Such a citizen sensor community (CSC) has stated or implied goals that are helpful in the work of formal organizations, such as an emergency management unit, for prioritizing their response needs. This research addresses questions related to design of a cooperative system of organizations and citizens in CSC. Prior research by social scientists in a limited offline and online environment has provided a foundation for research on cooperative behavior challenges, including 'articulation' …

Relating Reactive Transport To Hierarchical And Multiscale Sedimentary Architecture, Mohamad Reza Soltanian

Browse all Theses and Dissertations

This dissertation addresses the transport of reactive solutes in groundwater. The goal is to better link reactive transport processes to what is known about sedimentary architecture. New forms of Lagrangian-based models for the processes of retardation and dispersion are derived through linking the models to hierarchical and multiscale sedimentary architecture. This allows for a fundamental understanding of how these processes arise from the hierarchical architecture of sedimentary facies, and allows for a quantitative decomposition of these processes into facies-related contributions at different scales within the hierarchy.

The main focus is on reactive transport characterized by a high Damkohler number, DN, …

Proxy-Pet Building Blocks As A Design Element For Library Synthesis, Lainey Jo Mallin

Browse all Theses and Dissertations

In exploring radioligands for positron emission tomography (PET) imaging, it is not unusual to synthesize a library of compounds around some targeting scaffold, screen for optimal binding to a relevant diagnostic cellular target, remove some portion of optimized molecule so as to append the requisite reporter group, and then re-evaluate. To this end, the use of "click labeling" in radiochemistry is proving an increasingly attractive means of conjugating a 18F-reporter group, wherein the targeting scaffold bearing a terminal alkyne is allowed to react with a 2-[18F]-fluoroethylazide to forge a linkage as a 1,2,3-triazole substituent. Since the triazole linked prosthetic group …

Browser Based Visualization For Parameter Spaces Of Big Data Using Client-Server Model, Kurtis M. Glendenning

Browse all Theses and Dissertations

Visualization is an important task in data analytics, as it allows researchers to view abstract patterns within the data instead of reading through extensive raw data. Allowing the ability to interact with the visualizations is an essential aspect since it provides the ability to intuitively explore data to find meaning and patterns more efficiently. Interactivity, however, becomes progressively more difficult as the size of the dataset increases. This project begins by leveraging existing web-based data visualization technologies and extends their functionality through the use of parallel processing. This methodology utilizes state-of-the-art techniques, such as Node.js, to split the visualization rendering …