Digital Commons Network^™

Identifying Self-Regulation Strategies Students Use When Cognitive Load Occurs, Linyu Luo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

When the amount of information to process exceeds students’ capacity to do so, that indicates a problem in the learning environment that will hinder students’ successful learning. This study found that students use a variety of strategies to help them manage their own learning when they felt overwhelmed by the amount of information they needed to process. Further, these strategies differed from those typically expected of students when they are not overwhelmed.

Quantifying Floral Resource Availability Using Unmanned Aerial Systems And Machine Learning Classifications To Predict Bee Community Structure, Jesse Anjin Tabor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bees are important for agricultural and non-agricultural ecosystems because they pollinate both wild plants and commercial crops. Flowers provide pollen and nectar resources that bees use to survive and reproduce. Measuring the relationship between the floral community and bee community may help apiarists and land managers to make informed decisions in managing wild and domesticated bee species. Manual methods to describe and count flowering vegetation is costly in time and personnel. Unmanned aerial vehicle (UAV) technology may be an efficient way to describe and count flowering vegetation on a large scale. UAVs with classification analysis and ground transect surveys were …

Investigating Atmospheric Gravity Waves Using 3-Dimensional Spectral Analysis, Kenneth I. Zia

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Atmospheric gravity waves (GW) are generated from the ground and go into the upper layers of the atmosphere where space begins. These waves have strong effects on the temperature and circulation of the Earth’s atmosphere. The temperature changes caused by these waves are observed through special cameras looking at light that the Earth’s atmosphere naturally emit at night. One of these cameras is placed at McMurdo Station, Antarctica where the long nights are used to see these waves longer than anywhere else. The images captured there are automatically analyzed to determine wave properties to better understand how often they are …

Estimating The Effects Of Forms Of Computer-Based Scaffolding In Problem-Centered Stem Instruction, Mason Reed Lefler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Much like Post-Sputnik 1950s era there is a lot of interest in making sure that United States does not fall behind in Science, Technology, Engineering, and Mathematics (STEM) education. STEM learners are often presented with complex problems to solve both as part of their education and their work. Engineering education suffers from student dropout often due to how difficult it is to support students through solving problems. This dissertation is a close look at computer-based scaffolding, a method of supporting learners during problem solving through computer software. The first paper in this dissertation examines and resolves some of the debate …

Comparison Of Crop Water Use Estimation Methodologies In Irrigated Crops, Laura Christiansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As increasing drought events limit water resources available for irrigation, farmers and other water users are looking for ways to monitor how much water crops use over a growing season. The amount of water used by crops over time is the evapotranspiration (ET) rate. This study compares different methods for ET estimation to recommend methods to water users based on their accuracy, efficiency, and accessibility. Each method was used to estimate ET for sprinkler-irrigated corn and alfalfa fields in Modena, UT over the 2021 growing season. The Soil Moisture based ET (SMET) method was used to estimate ET based on …

The Strategy Of Metallgesellschaft: A Sophisticated Catallactic Analysis, Janette Goodridge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the fall of 1993, German company Metallgesellschaft, Ag experienced a loss of over one billion dollars. This loss resulted from its hedging strategy, and was one of the largest losses of its kind at the time. Naturally this raised interest regarding what caused these huge losses, and called into question the events and circumstances surrounding and leading up to this disaster. There are two basic schools of thought regarding Metallgesellschaft's strategy. The first is that it was a good strategy and had the potential to be successful and profitable. The other is that its strategy was risky and speculative. …

Understanding The Barriers To Carbon Farming On Private Lands, Harrison Naftel

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Climate change caused by manmade greenhouse gas emissions is one of the most important challenges facing society today. Through effective management for carbon sequestration private agricultural lands could become an important part of the solution to this problem. This paper explores the many different methods that farmers, ranchers, and landowners could use to implement sequestration on their land and examines the barriers to further participation in these projects by reviewing the challenges in the world’s current carbon offset markets and offering possible solutions.

Misinformation, Fact Checking, And Immigration Voting Preferences, Katherine Van Shaar

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Although misinformation is rampant in social media and society, there is not an extensive literature exploring the impact of misinformation and fact checks on people’s political preferences relating to immigration policies in the US. The purpose of this study is to examine the impacts of misinformation and fact-checking on people’s policy preferences about immigration. Using an experimental survey and a between-subject approach, we observe how anti-immigration politician’s statements (ranging from false to partially true) impact participants’ perceptions of hot-topic immigration issues with and without fact checks. We also study the correlation between people’s political affiliation and the impact of politicians’ …

Diurnal Changes In Alfalfa Quality And The Effects On Revenue Maximization, Nelson Sip

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Before alfalfa hay is sold to brokers or diaries, it is quality is evaluated to determine the price. These tests go into great detail about the micro and macro nutrients alfalfa contains or they could be a function of the fibers alfalfa contains to determine the digestibility. Studies show ways to increase alfalfa quality such as harvesting later in the day at peak photosynthesis. However, the financial benefits, or lack thereof, based on these changes to quality have no conclusion. Here we show that harvesting alfalfa later in the day increases the quality and has financial benefits. We found that …

Context And Content Of Teaching Conversations: Exploring How To Promote Sharing Of Innovative Teaching Knowledge Between Science Faculty, A. Kelly Lane, Brittnee Earl, Stephanie Feola, Jennifer E. Lewis, Jacob D. Mcalpin, Karl Mertens, Susan E. Shadle, John Skvoretz, John P. Ziker, Marilyne Stains, Brian A. Couch, Luanna B. Prevost

School of Biological Sciences: Faculty Publications

Background: Change strategies may leverage interpersonal relationships and conversations to spread teaching innovations among science faculty. Knowledge sharing refers to the process by which individuals transfer information and thereby spread innovative ideas within an organization. We use knowledge sharing as a lens for identifying factors that encourage productive teaching-related conversations between individuals, characterizing the context and content of these discussions, and understanding how peer interactions may shape instructional practices. In this study, we interview 19 science faculty using innovative teaching practices about the teaching-focused conversations they have with different discussion partners.

Results: This qualitative study describes characteristics of …

Late Quaternary Biotic Homogenization Of North American Mammalian Faunas, Danielle Fraser, Amelia Villaseñor, Anikó B. Tóth, Meghan A. Balk, Jussi T. Eronen, W. Andrew Barr, A. K. Behrensmeyer, Matt Davis, Andrew Du, J. Tyler Faith, Gary R. Graves, Nicholas J. Gotelli, Advait M. Jukar, Cindy V. Looy, Brian J. Mcgill, Joshua H. Miller, Silvia Pineda-Munoz, Richard Potts, Alex B. Shupinski, Laura C. Soul, S. Kathleen Lyons

School of Biological Sciences: Faculty Publications

Biotic homogenization—increasing similarity of species composition among ecological communities—has been linked to anthropogenic processes operating over the last century. Fossil evidence, however, suggests that humans have had impacts on ecosystems for millennia. We quantify biotic homogenization of North American mammalian assemblages during the late Pleistocene through Holocene (~30,000 ybp to recent), a timespan encompassing increased evidence of humans on the landscape (~20,000–14,000 ybp). From ~10,000 ybp to recent, assemblages became significantly more homogenous (>100% increase in Jaccard similarity), a pattern that cannot be explained by changes in fossil record sampling. Homogenization was most pronounced among mammals larger than 1 …

My Perspective, Gabriella Nabitaka

A Midwestern Review: A Magazine of the Arts and Issues at DePauw University

No abstract provided.

December 2022 Table Of Contents Newsletter - Scholarly Communication, Victoria Peters, Kayla Birt Flegal

Table of Contents Newsletter

This month's DePauw University Libraries newsletter surrounds the service of Scholarly Communication. We feature the library's open access statement, open access publishing, and meet the Scholarly Communication and Resource Services Librarian, Victoria Peters.

A Hidden Window: Love And Insecurity For Peter And Clive, Ian Smith '26

Best First-Year Seminar Writing

The concept that Peter Walsh’s views in Virginia Woolf’s Mrs. Dalloway are a hidden critique of her fellow Bloomsbury member Clive Bell’s incendiary essay Civilization is in no way innovative or groundbreaking, having been recognized and expanded upon by biographers and literary critics alike. However, this comparison is deceptively easy to extend to realms in which it does not apply. Woolf is first and foremost a novelist, and Peter Walsh is first and foremost a character in a novel. As such, Peter’s presence in Mrs. Dalloway should not be interpreted as a commentary on Bell’s Civilization, but rather as …

Cadaver Lucy, Gabriela Guerrero

A Midwestern Review: A Magazine of the Arts and Issues at DePauw University

No abstract provided.

Show Time, Halle Smith

A Midwestern Review: A Magazine of the Arts and Issues at DePauw University

No abstract provided.

The Park Bench, Samuel Erickson

A Midwestern Review: A Magazine of the Arts and Issues at DePauw University

No abstract provided.

Middlewestern, Anonymous _

A Midwestern Review: A Magazine of the Arts and Issues at DePauw University

No abstract provided.

Tell Me You Listen, Pamela Gonzalez

A Midwestern Review: A Magazine of the Arts and Issues at DePauw University

No abstract provided.

Monetary Policy And The Racial Wage Gap, Edmond Berisha, Ram Sewak Dubey, Eric Olson

Department of Economics Faculty Scholarship and Creative Works

This paper aims to clarify the relationship between monetary policy shocks and wage inequality. We emphasize the relevance of within- and between-wage-group inequalities in explaining total wage inequality in the USA. Relying on the quarterly data for the period 2000–2020, our analysis shows that racial disparities explain 12% of observed total wage inequality. Subsequently, we examine the role of monetary policy in wage inequality. We do not find compelling evidence that shows that monetary policy plays a role in exacerbating the racial wage gap. However, there is evidence that accommodative monetary policy plays a role in magnifying between-group wage inequalities …

Modeling Polar Cap Airglow Patch Intensities Using Three-Dimensional Ionospheres Produced By Data Assimilations, Michael R. Negale, J. V. Eccles, J. M. Holmes, S. V. Fridman, L. J. Nickisch

Space Dynamics Laboratory Publications

Discrete high density plasma structures in the Earth’s ionosphere that convect across the polar cap from the dayside to nightside are known as polar cap patches. Patches can interfere and disrupt satellite and HF communications, and therefore, accurate forecasting and modeling of this phenomenon would be greatly beneficial. In this study we have utilized the Global Positioning System Ionospheric Inversion (GPSII) data assimilation model using electron density measurements from the northward looking Resolute Bay Incoherent Scatter Radar (RISR-N) and total electron content (TEC) from ground based Global Navigation Satellite System (GNSS) receivers to reconstruct the high latitude ionosphere. From the …

Mango Surface Color Features Measurement Using Digital Image Processing, Md Towfiqur Rahman, Goutom Kumar, Md Abdul Momin

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Summary

Postharvest processing of agricultural produce is still done the conventional way in Bangladesh. Manual grading of agricultural produce, especially fruits and vegetables, is laborious and costly due to acute shortage of labor during the peak season, as well as difficulty maintaining the product quality. Machine vision system (MVS) applications are widely used nowadays as a non-destructive and cost-effective technology for automatically grading and sorting large volumes of produce in the packing house according to size, shape, color, texture, and surface defects. In this study, a simple MVS was constructed measuring different color features of mango fruit surface as a …

Framework For The Use Of Extended Reality Modalities In Aec Education, Barbara Oliveira Spitzer, Jae Hoon Ma, Ece Erdogmus, Ben Kreimer, Erica Ryherd, Heidi Diefes-Dux

Department of Agricultural and Biological Systems Engineering: Faculty Publications

The educational applications of extended reality (XR) modalities, including virtual reality (VR), augmented reality (AR), and mixed reality (MR), have increased significantly over the last ten years. Many educators within the Architecture, Engineering, and Construction (AEC) related degree programs see student benefits that could be derived from bringing these modalities into classrooms, which include but are not limited to: a better understanding of each of the subdisciplines and the coordination necessary between them, visualizing oneself as a professional in AEC, and visualization of difficult concepts to increase engagement, self-efficacy, and learning. These benefits, in turn, help recruitment and retention efforts …

The Role Of Mmp-3 In Copper Oxide Nanoparticle-Induced Pulmonary Inflammation And Fibrosis., Yuanbao Zhang

Electronic Theses and Dissertations

Copper oxide nanoparticles (Nano-CuO) are wildly used in medical and industrial fields and our daily necessities. However, the biosafety assessment of Nano-CuO is far behind their rapid development. This study was to investigate the potential mechanisms underlying Nano-CuO-induced pulmonary inflammation and fibrosis, especially to determine whether Nano-CuO exposure could dysregulate MMP-3, an important mediator in pulmonary fibrosis, and its roles in Nano-CuO-induced pulmonary inflammation and fibrosis. Aim 1 was to investigate whether exposure to Nano-CuO caused MMP-3 dysregulation in lung epithelial cells and the role of MMP-3 in Nano-CuO-induced alteration of cell junction-associated proteins. The potential mechanisms that might be …

Dual-Band Circularly Polarized Shared Aperture Antenna For Cubesat Communication System, Syed Salman Kabir

Graduate Theses and Dissertations (2019 - present)

For space exploration, a special class of small satellite known as CubeSat, has become popular in academia and industry in recent years. Due to its low cost and short development time, researchers prefer CubeSat over large-scale satellites wherever possible. In academia, CubeSat has major applications in the field of space atmosphere, space-to-ground communication, weather forecasting, etc. Like other spacecrafts, CubeSat uses multiple antennas in different frequency bands to establish a communication link with ground stations. Recent CubeSat missions are generating a large amount of data which cannot be downlinked using conventional antennas. The demand for a compact antenna system that …

A Long Time Ago In A Galaxy Far, Far Away: A Candidate Z ~ 12 Galaxy In Early Jwst Ceers Imaging, Steven L. Finkelstein, Micaela B. Bagley, Pablo Arrabal Haro, Mark Dickinson, Henry C. Ferguson, Jeyhan S. Kartaltepe, Casey Papovich, Denis Burgarella, Dale D. Kocevski, Marc Huertas-Company, Kartheik G. Iyer, Anton M. Koekemoer, Rebecca L. Larson, Pablo G. Pérez-González, Caitlin Rose, Sandro Tacchella, Stephen M. Wilkins, Katherine Chworowsky, Aubrey Medrano, Alexa M. Morales, Rachel S. Somerville, L. Y. Aaron Yung, Guillermo Barro

Pacific Faculty Work

We report the discovery of a candidate galaxy with a photo-z of z ~ 12 in the first epoch of the James Webb Space Telescope (JWST) Cosmic Evolution Early Release Science Survey. Following conservative selection criteria, we identify a source with a robust zphot = 11.8-0.2+0.3 (1σ uncertainty) with mF200W = 27.3 and ≥7σ detections in five filters. The source is not detected at λ < 1.4 μm in deep imaging from both Hubble Space Telescope (HST) and JWST and has faint ~3σ detections in JWST F150W and HST F160W, which signal a Lyα break near the red edge of both filters, implying z ~ 12. This object (Maisie's Galaxy) exhibits F115W-F200W > 1.9 mag (2σ lower limit) with a blue continuum slope, resulting in 99.6% of the photo-z probability distribution function favoring z > 11. All data-quality images show no artifacts at the candidate's position, and independent analyses …

The Effects Of Stigma On Quality Of Life And Psychological Outcomes In Participants With Varying Reports Of Subjective Cognitive Decline., Lauren Flaherty

Electronic Theses and Dissertations

Background: Diagnostic labels such as cognitive impairment, dementia or MCI often carry associated stigmatization. Stigma can lead to social isolation and rejection; increasing the likelihood of loneliness, depression, and anxiety. Depression and anxiety can be predictive of cognitive function; depression and anxiety are linked to stigma. Subjective cognitive decline (SCD) can be indicative of actual cognitive impairment. Subjective impairment and stigma can significantly predict quality of life. The aim of the proposed dissertation study was to explore whether higher SCD scores associate with more internalized stigma, and if this stigma mediates the relationship between SCD and depression, SCD and …

Reaching Syrians In Need: An Analysis Of Humanitarian Aid In The 21st Century., James Clark

Electronic Theses and Dissertations

The objective of this dissertation is two-fold. One is to critically consider humanitarian aid delivery to and through Syria via a lens that combines the humanities and social sciences. The fields of anthropology, political science and postcolonialism are employed to accomplish this. The second is to investigate the process involved in this delivery amid the country’s ongoing conflict. Combining these two facets provides a view of humanitarian aid as it relates to the conflict in Syria while applying a liberal arts-humanities approach. The introduction establishes the basis to discuss the existence of aid providers and those in need of aid …

Effects Of Top-Down Attention And Individual Differences On Recognition Memory And Recollective Experience., Anna Kelley

Electronic Theses and Dissertations

Memory accuracy and detail hold practical importance, and psychology has studied means to improve memory. One such means is performing visually guided saccades immediately before a memory test. Previous work has found this intervention to improve memory performance, an effect dubbed Saccade-Induced Retrieval Enhancement or SIRE. The top-down attentional control account posits that SIRE occurs because saccades activate attentional control regions in the brain, which contributes to executing top-down attentional control when searching memory. The current experiment tested this account of SIRE by attempting to replicate previous results and investigating whether a different attentional task, the Revised Attention Network Test …

Investigation Of Human N-Acetyltransferases (Nat1 And Nat2) Genetic Polymorphisms In Susceptibility To Aromatic Amine And Alkylaniline Genotoxicity., Mariam Habil

Electronic Theses and Dissertations

Arylamine N-acetyltransferases, NAT1 and NAT2, catalyze the detoxification and/or activation of carcinogens. Single nucleotide polymorphisms or SNPs result in different human NAT1 and NAT2 genotypes. We hypothesize that different NATs alleles will impact levels of N-acetylation, HPRT mutations, DNA damage and oxidative stress induced by carcinogens. NER-deficient Chinese hamster ovary (CHO) cells transfected with human CYP1A2 and NAT1*4, NAT1*14B, NAT2*4, NAT2*5B or NAT2*7B have been used to investigate N-acetylation of benzidine, β-naphthylamine (BNA), and 4, 4’-methylene bis (2-chloroaniline) (MOCA) as aromatic amines and 3,4-dimethylaniline (3,4-DMA) as one of alkylanilines and their associated toxicity. Our …