Digital Commons Network^™

Communication, Learning And Social Support At The Speaking Center: A Communities Of Practice Perspective, Ann Marie Foley Coats

USF Tampa Graduate Theses and Dissertations

In response to increasing demand for public speaking instruction, more institutions are establishing campus speaking centers staffed by student tutors. Peer tutors provide clients with a range of supports in the speech-making process, including suggestions for speech content and organization and for improving delivery during simulated practice sessions. This study investigates patterns of peer interaction in one campus speaking center to understand the dynamics of peer support in a non-classroom setting and how they may create the conditions for student learning. This ethnographic study conceptualized speaking center activities and the practice of oral communication skills development through the lens of …

Scientia Fall 2020 - Full Issue

Scientia

The full issue of the fall 2020 issue of Scientia.

Lab Notes

Scientia

Paleo Showcase; Expert Opinions; School of Nursing Director Appointed; EPISTEM Porject; CSH Honors Award Recipients; Diversity Fellowship

Strength And Agility Power Up Online Learning

Scientia

DePaul's College of Science and Health pivoted to online learning when the COVID-19 pandemic precluded in-person instruction. Using Labster and personalized support from tech-savvy instructional designers in the college, faculty were able to create virtual lab experiences for such areas as nursing and biology.

Implementing The Flipped Classroom In An Undergraduate Corporate Finance Course, Jayendra S. Gokhale

Publications

This study analyzes flipped mode of instruction in Corporate Finance. In the current environment, with many students in quarantine and greater emphasis on self-study, it is even more relevant to understand how students understand and retain concepts derived from online environment. In this study, performance of students in flipped mode is compared with the performance in traditional lecture-style. In flipped class, students watched a brief video-lecture, took an online assessment quiz prior to attending an interactive discussion-based class session, unlike the traditional lecture style. The results of this study suggest that with flipped mode, most students take greater responsibility of …

Update On The Use Of Transcranial Electrical Brain Stimulation To Manage Acute And Chronic Covid-19 Symptoms, Giuseppina Pilloni, Marom Bikson, Bashar W. Badran, Mark S. George, Steven A. Kautz, Alexandre Hideki Okano, Abrahão Fontes Baptista, Leigh E. Charvet

Publications and Research

The coronavirus disease 19 (COVID-19) pandemic has resulted in the urgent need to develop and deploy treatment approaches that can minimize mortality and morbidity. As infection, resulting illness, and the often prolonged recovery period continue to be characterized, therapeutic roles for transcranial electrical stimulation (tES) have emerged as promising non-pharmacological interventions. tES techniques have established therapeutic potential for managing a range of conditions relevant to COVID-19 illness and recovery, and may further be relevant for the general management of increased mental health problems during this time. Furthermore, these tES techniques can be inexpensive, portable, and allow for trained self-administration. Here, …

The Grizzly, November 12, 2020, Simra Mariam, Ava Compagnoni, Morgan Grabowski, Layla Halterman, Griffin Banks, Maggie Frymoyer, Shelsea Deravil

Ursinus College Grizzly Newspaper, 1978 to Present

Ursinus Enters New Pre-Engineering Partnership • Creating Art in a New Way: Ursinus College Dance Company • Notable Alum Profile: Kim Guadagno • A Bear in the Woods • Opinion: Residence Life - Big Brother is Watching You; Outside Morning Noises Near North Hall are Obnoxious • Intramural Cornhole Makes Impression at UC • Students' Fantasy Football

Qualities Of A Good English Language Teacher From The Perspectives Of Textbook Authors In The Field Of Language Teaching, Teachers, And Learners, Mohammad Mohammaditabar, Mohammad Sadegh Bagheri, Mortaza Yamini, Ehsan Rassaei

The Qualitative Report

Researchers in the field of language teaching have long been fascinated by the qualities of good teachers. Such qualities have rarely been approached qualitatively from different angles in a single study. Thus, this research aimed to unearth the qualities in question by employing a qualitative multimethod approach. To this end, 23 randomly selected standard language teaching textbooks were analyzed by two coders using qualitative content analysis. The judiciously adopted codes from the analysis were employed to design and carry out semi-structured interviews with nine effective language teachers as well as ten good learners nominated via purposeful sampling. The data gleaned …

The Dynamics Of Nonlinear Atmospheric Acoustic-Gravity Waves Generated By Tsunamis Over Realistic Bathymetry, P. A. Inchin, C. J. Heale, J. B. Snively, M. D. Zettergren

Publications

The investigation of atmospheric tsunamigenic acoustic and gravity wave (TAGW) dynamics, from the ocean surface to the thermosphere, is performed through the numerical computations of the 3D compressible nonlinear Navier-Stokes equations. Tsunami propagation is first simulated using a nonlinear shallow water model, which incorporates instantaneous or temporal evolutions of initial tsunami distributions (ITD). Ocean surface dynamics are then imposed as a boundary condition to excite TAGWs into the atmosphere from the ground level. We perform a case study of a large tsunami associated with the 2011 M9.1 Tohuku-Oki earthquake and parametric studies with simplified and demonstrative bathymetry and ITD. Our …

Spontaneous Raman Scattering Enhancement With Microcavities And Multipass Resonators For Trace Gas Detection, Juan Sebastian Gomez Velez

USF Tampa Graduate Theses and Dissertations

The continual increase in production and use of chemicals in an ever-growing field of applications naturally brings forth the necessity to accurately and efficiently measure molecular composition. Spontaneous Raman scattering is a reliable technique which can optically identify molecules based on their intrinsic rotational-vibrational energy structure. The Raman emission from a substance can be spectrally analyzed to detect molecular species simultaneously and with isotopic sensitivity using a single laser source. However, even though the process is non-invasive and effective, the rate at which the emission occurs is notoriously low due to a weak scattering cross-section. Therefore, research into the development …

Soybean: Good Source For High-Performance Supercapacitors, Jonghyun Choi

Electronic Theses & Dissertations

In this era of rising energy consumption, people are demanding high-performance and environment friendly energy storage devices. To meet these needs, there are many efforts to develop high performance supercapacitor using biomass. In this study, soybean shell, leaf, and stem was used as a source of carbon via chemical activation with an KOH activating agent. The activating agent KOH was mixed in several proportions ranging from 1:0.125 to 1:1, and all samples exhibited the tendency to increase the surface area and porosity as the activating agent ratio increased. Samples mixed with KOH in a 1:1 ratio showed not only the …

From Wave Propagation To Spin Dynamics: Mathematical And Computational Aspects, Oleksii Beznosov

Mathematics & Statistics ETDs

In this work we concentrate on two separate topics which pose certain numerical challenges. The first topic is the spin dynamics of electrons in high-energy circular accelerators. We introduce a stochastic differential equation framework to study spin depolarization and spin equilibrium. This framework allows the mathematical study of known equations and new equations modelling the spin distribution of an electron bunch. A spin distribution is governed by a so-called Bloch equation, which is a linear Fokker-Planck type PDE, in general posed in six dimensions. We propose three approaches to approximate solutions, using analytical and modern numerical techniques. We also present …

Numerical Simulations Of Nonlinear Waves And Their Stability: Stokes Waves And Nonlinear Schroedinger Equation, Anastassiya Semenova

Mathematics & Statistics ETDs

The present work offers an investigation of dynamics and stability of nonlinear waves in Hamiltonian systems. The first part of the manuscript discusses the classical problem of water waves on the surface of an ideal fluid in 2D. We demonstrate how to construct the Stokes waves, and how to apply a continuation method to find waves in close vicinity to the limiting Stokes wave. We provide new insight into the stability of the Stokes waves by identifying previously inaccessible branches of instability in the equations of motion for the fluid. We provide numerical evidence that pairs of unstable eigenvalues of …

Metacognition In Problem Solving Process Of One-Dimensional Kinematics Among Physics Pre-Service Teachers, Suci Rizkina Tari

Student Works (2020-2029)

Issue about low physics problem solving performance in Indonesia due to lack of metacognitive skills urged the development of explicit instruction. This urgency has led to the need of deep understanding about students’ metacognitive behaviour and how these behaviour affect the problem solving process. This study aims to identify metacognitive behaviour that students exhibited while solving one-dimensional kinematics problem and examined the role of metacognition in problem solving process of one-dimensional kinematics. A qualitative study was employed. Six students from Physics Education programme at a university was chosen as the participants in this study. Data were collected through think aloud …

Using Item Option Characteristics Curve To Analyze Misconceptions On Chemical Reactions Of Pre-Service Chemistry Teachers In Indonesia, Hilman Qudratuddarsi

Student Works (2020-2029)

Chemical reactions are an important component when studying chemistry but it is difficult to master them. The presence of three-level of representations (macro, sub-micro and symbolic) in chemistry add to this difficulty and as a result, misconceptions do take place. Misconceptions interfere with cognitive development of students and prevent them from having meaningful learning experiences. Thus, identifying accurately these misconceptions are paramount. These misconceptions are analysed using two-tier multiple-choice questions (2TMC). Some researchers argue its limiting diagnostic power and introduced three-tier and four-tier multiple-choice questions (3TMC and 4TMC). However, 3TMC and 4TMC have its own challenges in term of time …

Detrital Zircon (U-Th)/He Thermochronology In The Greater Caucasus: Implications For Thermal And Tectonic History Along-Strike, Kate Gutterman

LSU Master's Theses

Located along the northernmost boundary of the Arabia-Eurasia collision zone, the Greater Caucasus are a young, actively deforming mountain range striking WNW-ESE between the Black and Caspian Seas. Previous thermochronometric studies predominantly focused on the western portion of the range partially constrain the thermal and tectonic history of the Greater Caucasus. However, due to the complex nature of the tectonics in the region, multiple competing tectonic models have been suggested to explain the exact timing of collision and onset of rapid uplift. Furthermore, the Greater Caucasus exhibit competing along-strike gradients in modern shortening rates, mean annual precipitation, structural architecture and …

U/Pb Zircon Ages Of Felsic Veins In The Sawtooth Metamorphic Complex, Idaho, U.S.A: Implications For Magmatism And Vein Source, Kyle Tollefson

LSU Master's Theses

Veins associated with igneous activity provide numerous insights into the geologic history of an area. The Sawtooth Metamorphic Complex (SMC) in Idaho is a roof pendent of highgrade rocks cross-cut by numerous felsic veins of unknown age and source. Obtaining U/Pb zircon geochronology of these veins can facilitate understanding the ages of magmatism in the region, their source, when nearby batholiths were juxtaposed to the SMC, and provide additional insights into the geologic evolution of the area. Each potential source of these veins has a distinct age: the Sawtooth batholith (ca. 47 Ma), the Idaho batholith (98-53 Ma), an anatectic …

On The Construction And Mathematical Analysis Of The Wavelet Transform And Its Matricial Properties, Diego Sejas Viscarra

Rose-Hulman Undergraduate Mathematics Journal

We study the properties of computational methods for the Wavelet Transform and its Inverse from the point of view of Linear Algebra. We present a characterization of such methods as matrix products, proving in particular that each iteration corresponds to the multiplication of an adequate unitary matrix. From that point we prove that some important properties of the Continuous Wavelet Transform, such as linearity, distributivity over matrix multiplication, isometry, etc., are inherited by these discrete methods.

This work is divided into four sections. The first section corresponds to the classical theoretical foundation of harmonic analysis with wavelets; it is used …

Dna Self-Assembly Design For Gear Graphs, Chiara Mattamira

Rose-Hulman Undergraduate Mathematics Journal

Application of graph theory to the well-known complementary properties of DNA strands has resulted in new insights about more efficient ways to form DNA nanostructures, which have been discovered as useful tools for drug delivery, biomolecular computing, and biosensors. The key concept underlying DNA nanotechnology is the formation of complete DNA complexes out of a given collection of branched junction molecules. These molecules can be modeled in the abstract as portions of graphs made up of vertices and half-edges, where complete edges are representations of double-stranded DNA pieces that have joined together. For efficiency, one aim is to minimize the …

Generalised Fibonacci Sequences Under Modular Arithmetic, Connor Riddlesden

Rose-Hulman Undergraduate Mathematics Journal

In this paper, we find patterns and count the number of distinct generalised Fibonacci sequences under modular arithmetic. We will start with the repetition of the normal Fibonacci sequence modulo an integer, m, where m is greater than or equal to two and make connections to its dependency on the prime factorisation of m. We will then extend the complexity of the problem into generalised Fibonacci sequences with different starting values. Finally we will present some interesting observations that are still open problems.

The Name Tag Problem, Christian Carley

Rose-Hulman Undergraduate Mathematics Journal

The Name Tag Problem is a thought experiment that, when formalized, serves as an introduction to the concept of an orthomorphism of $\Zn$. Orthomorphisms are a type of group permutation and their graphs are used to construct mutually orthogonal Latin squares, affine planes and other objects. This paper walks through the formalization of the Name Tag Problem and its linear solutions, which center around modular arithmetic. The characterization of which linear mappings give rise to these solutions developed in this paper can be used to calculate the exact number of linear orthomorphisms for any additive group Z/nZ, which is demonstrated …

Configuration Spaces For The Working Undergraduate, Lucas Williams

Rose-Hulman Undergraduate Mathematics Journal

Configuration spaces form a rich class of topological objects which are not usually presented to an undergraduate audience. Our aim is to present configuration spaces in a manner accessible to the advanced undergraduate. We begin with a slight introduction to the topic before giving necessary background on algebraic topology. We then discuss configuration spaces of the euclidean plane and the braid groups they give rise to. Lastly, we discuss configuration spaces of graphs and the various techniques which have been developed to pursue their study.

On The Equitable Total (𝑘+1)-Coloring Of 𝑘-Regular Graphs, Bryson Stemock

Rose-Hulman Undergraduate Mathematics Journal

A graph is considered to be totally colored when one color is assigned to each vertex and to each edge so that no adjacent or incident vertices or edges bear the same color. The \textit{total chromatic number} of a graph is the least number of colors required to totally color a graph. This paper focuses on $k$-regular graphs, whose symmetry and regularity allow for a closer look at general total coloring strategies. Such graphs include the previously defined M\"obius ladder, which has a total chromatic number of 5, as well as the newly defined bird's nest, which is shown to …

Colorings And Sudoku Puzzles, Katelyn D. May

Rose-Hulman Undergraduate Mathematics Journal

Map colorings refer to assigning colors to different regions of a map. In particular, a typical application is to assign colors so that no two adjacent regions are the same color. Map colorings are easily converted to graph coloring problems: regions correspond to vertices and edges between two vertices exist for adjacent regions. We extend these notions to Shidoku, 4x4 Sudoku puzzles, and standard 9x9 Sudoku puzzles by demanding unique entries in rows, columns, and regions. Motivated by our study of ring and field theory, we expand upon the standard division algorithm to study Gr\"obner bases in multivariate polynomial rings. …

Investigating First Returns: The Effect Of Multicolored Vectors, Shakuan Frankson, Myka Terry

Rose-Hulman Undergraduate Mathematics Journal

By definition, a first return is the immediate moment that a path, using vectors in the Cartesian plane, touches the x-axis after leaving it previously from a given point; the initial point is often the origin. In this case, using certain diagonal and horizontal vectors while restricting the movements to the first quadrant will cause almost every first return to end at the point (2n,0), where 2n counts the equal number of up and down steps in a path. The exception will be explained further in the sections below. Using the first returns of Catalan, Schröder, and Motzkin numbers, which …

New Theorems For The Digraphs Of Commutative Rings, Morgan Bounds

Rose-Hulman Undergraduate Mathematics Journal

The digraphs of commutative rings under modular arithmetic reveal intriguing cycle patterns, many of which have yet to be explained. To help illuminate these patterns, we establish a set of new theorems. Rings with relatively prime moduli a and b are used to predict cycles in the digraph of the ring with modulus ab. Rings that use Pythagorean primes as their modulus are shown to always have a cycle in common. Rings with perfect square moduli have cycles that relate to their square root.

On The Enumeration Of Shapes, May Cai, Nicholas Liao

Rose-Hulman Undergraduate Mathematics Journal

We define a shape as a union of finitely many line segments. Given an arrangement of lines on a plane, we count the number of shapes in the arrangement by examining the symmetries of the arrangement and applying Burnside's lemma. We further establish a generating function for the number of distinct line segments on a line with k distinguished points. We list all affine line arrangements of four and five line segments, together with the corresponding number of shapes on them.

Iterated Line Graphs On Bi-Regular Graphs And Trees, Brenden Balch

Rose-Hulman Undergraduate Mathematics Journal

In 1965, van Rooij and Wilf considered sequences of line graphs, in which they grouped sequences of line graphs into four categories. We’ll add to their research by presenting results on sequences of line graphs for star graphs and bi-regular graphs. We will then investigate slight variations of star graphs.

A Connection Between Quadratic Rational Maps And Linear Fractional Maps, Laura Schlesinger, Anna Marek, Ella White, Danqi Yin

Rose-Hulman Undergraduate Mathematics Journal

This research project is an investigation into quadratic rational maps, $\vp$, of one complex variable that map the unit disk to itself. Previous research \cite{brittney} shows that for each $\vp$, a corresponding linear fractional map $\zeta$ can be found using the coefficients of $\vp$, and this $\zeta$ can be used to characterize functions in the kernel of the adjoint of the composition operator with symbol $\vp$, defined on a space of analytic functions. In this paper, we show sufficient conditions to ensure that certain cases of $\vp$ map the unit disk to itself and find all the forms of $\zeta$. …

Effect Of Increased Autumn Temperature And Co2 Concentration On Frost Hardening And Winter Survival In Lolium Perenne, Mats Höglind, M. Jørgensen, Liv Østrem, L. Mortensen

IGC Proceedings (1977-2023)

No abstract provided.