Digital Commons Network^™

Nebraska Test #2296: John Deere 9rx 710, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Test #2268: Case Ih Steiger 595, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Test #2269: Case Ih Steiger 645, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary #1294: Fendt 620 Vario, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary #1292: Fendt 616 Vario, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary #1298: Fendt 726 Vario Gen 7.1, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Lives And Lessons Of Zoo Animals, Nicole Emlen

Undergraduate Theses, Professional Papers, and Capstone Artifacts

This project was an interdisciplinary museum exhibit that was displayed at the Montana Natural History Center between April 4 and May 12, 2025. It displays my photographs that I took of some of the animals I worked with during my summer 2024 internship at ZooMontana. In this project, I educate the public about three main functions of zoos--rescue, conservation, and education--through the stories and lives of four species. These animals all have unique stories that are important to share to improve public knowledge of why zoos are important and how we can improve relationships between humans and wildlife. Photography is …

A Number Talk Informed By The Socio-Ecological, Elizabeth Suazo-Flores, Darian Sherva, Christine Mcgrail, Amber Adgerson

Teaching, Leadership & Professional Practice Faculty Publications

Fourth graders used a variety of strategies to identify the total number of objects buried in the soil.

Personalized Physics Learning Through Ai: Insights From Problem Generation, Chatbot Dialogues, And Intelligent Tutoring Systems, Atharva Dange

Physics Dissertations - Archive

Artificial intelligence (AI) is poised to transform science education, yet questions remain on how best to integrate these technologies into teaching and learning. This dissertation investigates the use of AI-driven tools in university physics courses through three complementary studies. In the first study, a generative language model (ChatGPT) was used to create novel physics homework problems aligned with course objectives. Analysis showed that, after expert vetting, AI-generated questions can foster higher-order problem-solving and reduce student reliance on solution memorization, though careful instructor oversight is required to ensure accuracy. The second study embedded an AI chatbot as a learning aid in …

Examining The Impact Of Conceptual Mathematics Instructional Practices On Middle School Achievement For Low-Income Public-School Students, Tracy L. Donath

Theses and Dissertations

This dissertation in practice investigates the persistent decline in mathematics proficiency between the fourth and fifth grades, particularly among low-income compared to high-income students in a large, urban public school district in central Illinois. Using Mintrop’s Cycle of Inquiry and the CPED framework in a 90-day intervention, seven fifth-grade teachers implemented small group lessons designed to build students’ conceptual understanding of grade level mathematics. This data-driven intervention encouraged the teachers to use a variety of manipulatives and visual representations to improve students’ mathematics proficiency on four grade level Common Core standards. Data collected through classroom pretests, posttests, and exit tickets, …

Mathematical Practices (Commonly Used By Mathematicians) In Mathematics Teachers’ Solutions To Algebraic Problems, Vesife Hatisaru, Steven Richardson, Jon R. Star

Research outputs 2022 to 2026

A teacher of mathematics knows mathematics as a teacher and as a mathematician. Whilst the existing research on teacher knowledge contributes to our understanding of the ways of knowing mathematics as a teacher, little is known about ways of knowing mathematics as a mathematician. Guided by the conceptual framework of mathematical practices (MPs) (commonly used by mathematicians), this case study aimed to contribute to fill this gap. The study examined solutions generated by two secondary teachers of mathematics to a set of algebraic problems to determine which MPs are apparent, or not, in the teachers’ work. Data were content analyzed …

“Regression To The Mean”: The Confluence Of Eugenics And Statistics In The 19th And 20th Centuries, Emrys G. King

Pomona Senior Theses

The work of this thesis is twofold — first, qualitatively characterizing the confluence between the British eugenics and statistics movements in the late 19th and early 20th centuries, and second, quantitatively analyzing the effect of this foundation on pedagogical materials in the growing field of statistics between 1880 and 1970. Towards the first goal, the history of the method of least squares, state statistics, and positive and negative eugenics are outlined, followed by a close reading of the foundational texts authored by Francis Galton and Karl Pearson that introduced linear regression. Towards the latter goal, English-language statistics textbooks published between …

Greenhouse Management For The Smaller Structure--Educational And Hobby, Stacy A. Adams

Department of Agronomy and Horticulture: Faculty Publications

Greenhouses used for teaching or by hobbyist are smaller than those used for commercial production or found in the retail environment. Structural materials, covering, mechanical equipment, and control systems often are packaged as a kit made available through greenhouse suppliers. Supplier construction services may not be available, in which buyers must use local contractors to complete the installation. Greenhouses are unique structures that differ greatly from sheds or other outbuildings. They have coverings that allow maximum light transmittance, protected from UV degradation, and can handle wide inside to outside temperature extremes. This extension circular provides valuable information on the character, …

Initial Growth Of Inclusive Knowledge And Leadership Practices By Science Education Teacher-Leaders, Elizabeth B. Lewis, Elizabeth Hasseler, Rachel Benzoni, Gina S. Matkin, Wendy Smith, Daniel R. Claes, David M. Harwood, L. J. Mcelravy, Dawn Jaramillo

Department of Teaching, Learning, and Teacher Education: Presentations

Slies of a presentation given at the 2025 Annual International National Association for Research in Science Teaching (NARST) Conference on the initial results from an iterative program design for educating science education leaders.

Differences In Motivation For Biology Learning: A Measurement Invariance Testing And Latent Mean Comparison Approach, Ting Dai, Kuan Xing, Avi Kaplan, Jennifer G. Cromley, Kyle R. Mara, Tony Perez

STEMPS Faculty Publications

Educational and psychological research often involves comparing motivation across groups. It is critical to ensure that observed differences in motivation are true variations by group, not due to measurement biases. With a diverse sample of undergraduate students (N = 2200), this study measured internal consistency and gathered validity evidence based on the internal structure of five motivation scales. To compare motivation for biology between groups of undergraduate students, this study tested for measurement scalar invariance by group and, accordingly, conducted latent factor mean comparisons to understand true group differences. On average, female students held lower expectancy beliefs and self-efficacy …

Using Abandoned Model Systems And Historical Literature To Teach Modern Concepts And Techniques In Cell Biology, Leocadia V. Paliulis, Gunar Fabig, Sandra Stein, Silke Tulok, Anja Nobst, Chukwuebuka William Okafornta, Thomas Kurth, Thomas Müller-Reichert

Faculty Journal Articles

The cell biology literature of the 19th and early-to-mid 20th centuries is full of the seminal works that were critical for the development of our current understanding of biology but were done using model systems that are no longer commonly used. We argue that these historical papers are ideal for the development of course-based research experiences, both because the background work is conceptually and technically straightforward, and because the study of the abandoned systems stopped prior to the availability of modern techniques. These abandoned systems offer outstanding opportunities for teaching modern light and electron microscopy techniques, thus providing students with …

Using Quanser Platform To Introduce Engineering Technology Students To Autonomous Vehicles, Otilia Popescu, Logan Beaver, Murat Kuzlu, Krishnanand Kaipa

Engineering Technology Faculty Publications

The area of autonomous vehicles is not new, but the latest advances in various technologies gave it a new boost in the last decade and it keeps growing in interest. However, undergraduate curricula rarely include courses specific to this area, which is considered mostly an interdisciplinary graduate field. While various programs introduce students to the background needed to understand and approach the field, specific work on autonomous vehicle projects is left for extra curriculum activities or student clubs, and eventually for senior (capstone) projects. This paper presents the work of a team of electrical engineering technology students on an autonomous …

Flipped Classroom Techniques In A Thermodynamics Course In Engineering Technology, Nathan Luetke, Orlando Ayala, Vukica Jovanovic

Engineering Technology Faculty Publications

Teaching undergraduate thermodynamics presents numerous challenges to educators due to its inherently complex and abstract nature. The vast array of applications in engineering requires educators to strike a balance between theoretical principles and practical examples, thereby creating a meaningful and applicable learning experience. This paper presents an approach to teaching an undergraduate thermodynamics course in engineering technology developed over four consecutive semesters blending traditional lecture-based teaching with flipped classroom techniques. The teaching methods used, and modifications made each semester are presented along with student performance.

Differential Equations' Coverage In Circuits And Heat Transfer Courses In An Engineering Technology Curricula, Otilia Popescu, Orlando Ayala

Engineering Technology Faculty Publications

Differential equations are at the core of any undergraduate engineering as well as of science programs. While a course in differential equations is required by any engineering degree, it is not a requirement for engineering technology programs, which usually require mathematics up to calculus I. This paper discusses the undergraduate engineering technology curricula, focusing on how differential equations are taught to engineering technology students and how they are covered in the programs. In particular, the paper will discuss the treatment of differential equations in electrical circuits and heat transfer courses.

Representation In Engineering-Focused Children's Literature: A Critical Content Analysis, Angela Eckhoff

Teaching & Learning Faculty Publications

Children’s picturebooks have long been understood as a powerful medium for exploring aspects of children’s lives, experiences, and identities serving as mirrors which allow children to see themselves reflected, as windows through which they can gain insight into the experiences of others, and as sliding glass doors when children are connected to the story and characters in meaningful ways. Utilizing a critical content analytic approach, this research examined the identity markers and engineering practices found in contemporary children’s picturebooks with an engineering focus. The analysis yielded key themes that highlight the ways children can interact and connect to the characters …

Perceptions Of Stem Education And Artificial Intelligence: A Twitter (X) Sentiment Analysis, Demetrice Smith-Mutegi, Yoseph Mamo, Jinhee Kim, Helen Crompton, Matthew Mcconnell

Teaching & Learning Faculty Publications

Background, context, and purpose of the study: Artificial intelligence (AI) is becoming increasingly prevalent in science, technology, engineering, and mathematics (STEM) education, holding promising potential for supporting the design and implementation of quality STEM education. However, there is a lack of data-based research studying the diverse perceptions of AI in STEM education as conveyed on social media, the factors that influence those perceptions, or the change in those perceptions over time among public audiences. Results, the main findings: The purpose of this study was to examine public perceptions of AI in STEM education by analyzing X posts (Tweets) between 04/28/2020 …

Teaching To Whom And With Whom: The Role Of Context In Developing Preservice Teachers' Self-Efficacy For Teaching Engineering And Coding Via Robotics, Jennifer Kidd, Kristie Gutierrez, Min Jung Lee, Danielle Rhemer, Pilar Pazos, Krishna Kaipa, Stacie Ringleb, Orlando Ayala

Teaching & Learning Faculty Publications

Due to mandates for the inclusion of engineering and computer science standards for K-6 schools nationwide, there is a need to understand how teacher educators can help develop preservice teachers’ (PSTs’) teaching self-efficacy in these areas. To provide experience teaching and learning engineering and coding, PSTs in an instructional technology course were partnered with undergraduate engineering students in an electromechanical systems course to teach robotics lessons to fifth graders (10–11 year olds) over Zoom. A multi-case study approach explored teaching self-efficacy development for three preservice teachers during their robotics project experiences using multiple data sources, including surveys, reflections, interviews, and …

Teacher Moves For Building A Mathematical Modeling Classroom Community, Ayse Ozturk

Teaching & Learning Faculty Publications

This study investigates the role of teacher talk moves in cultivating a mathematical modeling classroom community. From the models and modeling perspective, it explores how specific teacher talk moves promote student participation in modeling phases and the exchange of ideas with other students. Through a four-week after-school program involving eight secondary students, data were collected from small-group and whole-class discussions. The findings reveal that teacher talk moves can be categorized into three core types: eliciting students’ ideas, introducing key terms and ideas used in mathematical modeling, and encouraging students to take a position during discussions. These moves are shown to …

Rural Families' At-Home Stem Tinkering Stimulates Creativity, Self-Expression, And Social-Emotional Engagement, Kristie S. Gutierrez, Kylie J. Swanson, Margaret R. Blanchard

Teaching & Learning Faculty Publications

Introduction: Informal STEM learning experiences include visits to museums, zoos, and aquariums as well as experiments and other activities performed at home. Family involvement in these experiences has been linked to increased student interest and participation in STEM fields; yet, scant research has been conducted on at-home STEM.

Methods: This descriptive case study investigated the tinkering experiences of nine rural middle school students and their families who participated in a series of interactive, at-home activities. The overarching research question was, in what ways do families engage in at-home STEM interventions? Data analyses of at-home audio recordings were guided by the …

Teaching Engineering To Enhance Beginning Elementary Preservice Teachers' Engineering-Related Knowledge And Beliefs, Jennifer Kidd, Danielle Rhemer, Kristie Gutierrez, Stacie I. Ringleb, Krishnanand Kaipa, Orlando Ayala, Pilar Pazos, Francisco Cima, Isaac Kumi

Teaching & Learning Faculty Publications

Background

Teacher educators have begun exploring the most effective ways to prepare preservice teachers (PSTs) to engage elementary students in engineering design. However, this remains challenging as PSTs continue to report a lack of exposure to engineering during their K-12 school experiences. This study investigates the engineering-related knowledge and beliefs of PSTs in their first education course, collaborating in small teams to lead elementary students in engineering design challenges. We explored two different iterations to understand how the structure of the teaching experiences contributed to PST outcomes as a first step in identifying helpful approaches. In spring 2022, PSTs collaborated …

Scholarly Inquiry And Practice In Mathematics Teacher Education Through Intimate Scholarship, Signe E. Kastberg, Elizabeth Suazo-Flores, Melva Grant, Olive Chapman

Teaching & Learning Faculty Publications

Historically scholarly inquiry and practice in mathematics education has responded to societal values and questions. Drawing from the Journal of Mathematics Teacher Education’s description of mathematics teacher educator (MTE) work as in solidarity with and alongside mathematics teachers, we turn to mathematics teacher education research as a series of paradigm shifts. MTEs committed to supporting teachers and transferring knowledge attempted to influence mathematics teachers’ work by exploring and understanding teachers’ behaviors. MTEs have also used insider’s perspectives to report the particular of MTEs’ work by describing it beyond behavior and knowledge. These scholars fulfill the call for theoretical eclecticism …

Exploring Physics Teacher Identity: Pathways Toward Equitable Instruction Among Teachers, Clausell Mathis, Jomo Mutegi, Turhan Carroll, Maya Patel, Andrea Wooley

Teaching & Learning Faculty Publications

Physics teacher identity encompasses teachers' beliefs and views toward being a physics teacher. Physics teacher identity is influenced by teachers' perspectives on physics teaching and learning. Previous studies on teacher identity in general suggest that the construct is complex and malleable. Studies further suggest that it influences instructional methods, student engagement, and classroom environment. However, within physics education, there has yet to be an examination of how physics teacher identity influences "equitable" teaching approaches. This qualitative study sought to identify various dimensions of physics teacher identity and its implications for physics education research. We interviewed secondary and postsecondary physics teachers …

Knowing By Heart: Philosophical Dimensions Of Humanistic Mathematics Education, Catherine Henney

Theses and Dissertations

This project seeks to revive interest in late twentieth century humanistic mathematics education (HME) so that its principles might cross the boundary of higher education and settle in corners of the K-12 math education space. In particular, HME’s theme of teaching math humanistically directs attention to features and phenomena that bear strongly on students’ daily classroom experiences. Personhood, agency, inquiry, meaning, environment, feelings, relationships: these elements invite a more thorough meditation and philosophical analysis. Though it is a largely philosophical endeavor, this project is enlivened by classroom vignettes and case studies that bring practical relevance to HME’s core principles. Chapters …

First Portfolio - Alec 207: Communicating Science With Public Audiences, Heather Akin

UNL Faculty Course Portfolios

This portfolio investigates how collaborative group projects and structured peer reviews enhance undergraduate students’ science communication skills in ALEC 207: Communicating Science with Public Audiences. Drawing on mid-semester evaluations, peer review reflections, and overall course outcomes, the analysis highlights how group-based activities and peer critiques help students develop clarity, relevance, and confidence in their communication. ALEC 207 introduces core principles of strategic communication in food, agriculture, and natural resources contexts, and gives students opportunities to refine their writing through press releases, feature articles, visual communications, and audience-tailored messages. While the course predominantly emphasizes writing, it also leverages ongoing revisions to …

From Poetry To Policy: How H-Stem Has Guided My Research Path, Kayla D. Taylor

Student Works

Embry-Riddle PhD student Kayla Taylor was invited to share how Humanistic STEM has shaped her educational journey at the third annual Humanistic STEM symposium.