Engineering Commons^™

Leveraging Machine Learning For Detecting Iot-Based Interference In Operational Wifi Networks, Josh Pulse

Honors Program Theses

IoT (Internet of Things) devices have become increasingly popular in recent years while WiFi continues to serve as primary network provider indoors. With the advancements in technology, the networks of IoT devices continue to weave closely with indoor WiFi network deployments. Both kinds of these networks primarily operate in 2.4 GHz ISM Band (though latest WiFi standards can operate in 5 GHz and 60 GHz bands, too). With the multitude of tiny IoT sensors being deployed indoors alongside operational WiFi networks, severe interference scenarios cannot be ruled out. As a result of this interference, performance of WiFi networks is bound …

Model-Based Predictive Controller Design, Soheil Sadeghi

Graduate Research Papers

Process control in industries is becoming more critical due to demands on reducing consumed energy, reducing cost, and improving system efficiency and performance. In this work, a well-developed, model-based controller is introduced and implemented in one of the most common processes in the industry. Model Predictive Controller (MPC) has been studied for ten years, but recently has emerged into small industries as the number of current applications grows. These controllers need a process model in the forms of transfer functions, step response, or state-space. Although obtaining a process model can be a cumbersome task, it is worth having it (the …

Activity Recognition Based On Thermopile Imaging Array Sensors, Qingshan Liang

Dissertations and Theses @ UNI

With aging population, the importance of caring for elderly people is getting more and more attention. In this paper, a low resolution thermopile array sensor is used to develop an activity recognition system for elderly people. The sensor is composed of a 32x32 thermopile array with the corresponding 33° × 33° field of view. The outputs of the sensor are sequential images in which each pixel contains a temperature value. According to the thermopile images, the activity recognition system first determines whether the target is within the tracking area; if the target is within the tracking area, the location of …

Viability Of A Proposed Transparent Fluid Model For Analog Metal Casting Filling Process, Andres Segura Irazoqui

Dissertations and Theses @ UNI

No abstract provided.

Developing Arduino Coding Curriculum, Tyler Brown, Riley Bucheitte, Timothy Kidd

Summer Undergraduate Research Program (SURP) Symposium

No abstract provided.

Investigating The Production Of Cores By Using Reclaimed Foundry Green Sand, Kristopher Lee Boss

Dissertations and Theses @ UNI

Increasing environmental regulations, transportation cost, delivery interruptions leading to production concerns, disposal cost, and demand from other industries have influenced the way foundry’s view used sand. The purpose of this research was to determine a beneficial reuse of overflow-green sand that would normally be disposed. The reclamation process used is a combination of mechanical and wet reclamation. The focus was on the production of foundry cold box cores and if using this reclamation process could create a core with a similar quality performance compared to new sand. Research in reclamation could pave the way for a closed loop sand system, …

The Effect Of Cutting Condition Selection On Tool Life In Sand Milling, Craig Ertl

Dissertations and Theses @ UNI

This study was completed to address the problem of determining what effect selected cutting conditions have on tool wear and tool life in robotic sand milling (RSM) operations. The purpose of this study was to analyze the tool wear mechanisms and characteristics that govern the RSM process. The purpose was also to establish an experimental methodology that may be used in future studies to assess tool life when examining various tooling materials and designs, as well as additional sand workpiece materials. Completing this research allowed the machining process to be optimized by analyzing differences in tooling cost with variable values …

How Quality Management Has Been Impacted In The Face Of Covid-19, Eldina Siljkovic

Dissertations and Theses @ UNI

The Coronavirus pandemic has impacted many facets of the United States. This study focuses on its magnitude in comparison to prior pandemics such as Anthrax, SARS, and Ebola. In addition to this comparison its impact on Quality Management within the agricultural sector and food supply chain was also assessed. The results of these studies showcase that COVID-19 has grown exponentially in comparison to prior pandemics and will continue to do so as we enter the winter season. Agricultural equipment manufacturing companies saw a drastic decline in quarterly revenues within 2020 in comparison to 2019. Millions in net sales were lost …

3d Printing Technology On Spare Parts Business Supply Chain Management: A Case Study In Appliance Industry, Salih Boysan

Dissertations and Theses @ UNI

This study investigates the effects of using Additive Manufacturing (AM), also known as 3D printing, to produce spare parts within the supply chain of an appliance manufacturing company.

This research is based on an analysis of the operation of a spare parts business of an appliance manufacturing company. This research study used real data to investigate the feasibility of using 3D printing to reduce complexity in the spare parts division in terms of supplier rationalization, inventory reduction, and total cost of ownership. The research method used two scenarios: one where manufacturing spare parts traditionally was the baseline model and the …

Fossil Mobiles: Exploring The Process Of Art As Science Inquiry For Elementary Students Through A Grounded Theory Study, Jolene K. Teske, Courtney Clausen, Harun Parpucu, Phyllis Gray, Audrey C. Rule

Journal of STEM Arts, Crafts, and Constructions

Arts integration into Science, Technology, Engineering, and Mathematics (STEM) subject areas is currently an important area of investigation. This study developed a grounded theory of how artmaking of a mobile related to fossil life of the Devonian period engendered geoscience inquiry. Data were collected from elementary students entering fourth to sixth grade (7 male, 9 female) attending a week-long summer camp at a Midwestern university. Students engaged in a daily hour-long class creating fossil mobiles and learning geoscience content through illustrated slide shows, form and function sets of materials related to Devonian fossils, fossil books, and a fossil hunter- fossil …

Exploring Preservice Teachers’ Still-Life Paintings Of Crystals With Artist-Focused Compared To Science-Focused Introductions, Mahjabeen Hussain, Dessy Stoycheva, Audrey C. Rule, Denise A. Tallakson

Journal of STEM Arts, Crafts, and Constructions

This experimental study was undertaken with preservice teachers to test whether the use of science integration into arts education increases demonstration of science details and creative features in artwork. Two conditions were created: arts-focused and science-focused; gouache still-life paintings were produced and analyzed, and an attitude survey was completed. The results suggested that science integration into visual arts classes increased creativity for the arts-focused condition and increased science concepts in the science-focused condition. Participants in both conditions reported positive attitudes, specifically, high levels of enjoyment, alluded to lack of experience with arts and creative projects, and expressed desire for more …

A Content Analysis Of Thirty Children’S Picture Books About Ecology, Natalia Martín Martín, Jennifer L. Hageman, Sarah E. Montgomery, Audrey C. Rule

Journal of STEM Arts, Crafts, and Constructions

This study presents a content analysis of 30 ecology-themed children’s picture books published in English and Spanish from 1994 to the present. Books were analyzed for the following aspects: 1) Nature appreciation, 2) Interrelatedness of Nature, 3) Realistic ecology problem, 4) Differing perspectives, 5) Hope for a solution, 6) Reflection and responsibility, 7) Steps for a solution, 8) Positive tone, 9) Representation of diversity, 10) Appropriate illustrations, 11) Story appeal, and 12) Developmental appropriateness. Scoring guidelines are provided in an appendix. Content analysis results revealed that most books raise awareness about the impact of human action on the environment, although …

Ocean Underwater Scene Dioramas Of First Graders With Submarine Porthole Views, Ksenia Zhbanova, Audrey C. Rule, Denise A. Tallakson

Journal of STEM Arts, Crafts, and Constructions

Ecology education of the younger generations is vital for worldwide change of people’s attitudes toward nature warranted by the current global ecological crisis. Yet, this goal needs to be addressed through age-appropriate activities that are educational and engaging. This practical article focuses on dioramas of ocean reef life made by first graders. This arts-integrated project served two main purposes: 1) education of primary students about ocean ecology and helping students realize their roles in saving nature 2) increasing student science content knowledge. Additionally, several other benefits of making dioramas emerged during this project, including highly creative student products, genuine interest …

Slime Bash Social: A Tactile Manipulative For Child And Youth Play, Joyce A. Levingston, Marie E. Adebiyi, Brian Hadley, Younis Al-Hassan, Dongyub Back, Michelle Cook, Christopher R. Edginton

Journal of STEM Arts, Crafts, and Constructions

The play product of slime has gained increasing popularity amongst children and youth throughout the United States. Slime can be thought of as a tactile manipulative that can be shaped, stretched, expanded, lumped together, twisted, squeezed, squashed, folded, rolled, shredded, twirled, swirled, pounded, and cut or pulled apart. As a learning tool, slime can and does support STEM initiatives and programs. Slime can be created using simple ingredients that are easily measured, combined, and prepared by children and youth. In addition, slime can incorporate components such as glitter, beads, shaving cream, color dyes and other items. This paper offers an …

Practical Art Projects Related To Children’S Picture Books About Ecology, Jennifer L. Hageman, Natalia Martín Martín, Sarah E. Montgomery, Audrey C. Rule

Journal of STEM Arts, Crafts, and Constructions

This study presents art projects that reinforce scientific content presented in children’s picture books about ecology. Ten K-6 students from varying socioeconomic classes, and different cultural and language backgrounds from the United States and Spain participated. Next Generation Science Standards were identified and addressed in these art projects. Students’ understanding and engagement were evaluated through teacher observations, photographs, and a student attitude survey. Upper- and lower-elementary students evidenced increased understanding of environmental issues, and high level of enjoyment and engagement through these art projects integrated with science content. Researchers encourage educators to incorporate picture books and art in science lessons …

Editorial: Developing Creativity Through Stem Subjects Integrated With The Arts, Ksenia Zhbanova

Journal of STEM Arts, Crafts, and Constructions

This issue of the Journal of STEM Arts, Crafts, and Constructions is focused on creativity - one of the most highly-desirable 21^st Century skills on personal and global levels. Time, pedagogical knowledge, and resource constraints limit the number of opportunities for teachers to develop creativity in students. In this editorial, creativity development steps and strategies are illuminated along with specific roles of STEM subjects and the arts in development of student creativity. The processes of creativity development used in STEM and the arts are compared to each other and to the non-subject-specific creative process model of Root-Bernstein and Root- …

Influence Of Sonication Parameters On The Morphology Of Nanocellulose Aerogels, Dexter Cox, Tim Kidd

Research in the Capitol

Nanocellulose is a renewable and biocompatible material that has a tensile strength similar to aluminum, is stiffer than Kevlar, and has a strength to weight ratio eight times that of stainless steel. There has been a range of studies on nanocellulose materials for potential use as a low-calorie food substitute, biomedical wound dressings, and as a structural component for buildings. Throughout this research experiment, nanocellulose aerogels of different mass compositions were created through a mechanical process using an ultrasonic processor with a titanium probe attachment. The purpose of this study was to develop a method that reduces the amount titanium …

An Investigation Into The Prediction Of Double-Skin Penetration Within Chromite Molds And Cores In Heavy Section Steel Casting Using Process Simulation Software, Nathaniel Bryant

Dissertations and Theses @ UNI

This investigation was conducted in response to a commercial steel foundry approaching the University of Northern Iowa for assistance with a recurring defect they experienced on a production casting. The defect was described as a mass of metal that penetrated and consumed the interstices of their chromite molds and cores, and it was determined to consist of fayalite. After an extensive literature review, it was concluded that the foundry experienced the double-skin defect, a niche quality issue that most commonly occurs in heavy-section steel casting with chromite molding materials

After it was determined that the double-skin defect was occurring, a …

Impact Of Parent Mentoring And Participation In First Robotics On Middle And High School Age Female Perceptions Of Engineering Careers, Kirsten Olson

Dissertations and Theses @ UNI

Female presence within engineering careers has been a growing concern for decades, as females continue to major in engineering at a far lesser rate than males. Females may be affected by many different environmental factors, from parental influence, early engineering experiences, negative stereotypes present in male dominated careers, and male dominant culture in content classes and the workplace. Researchers have explored ways in which the gender gap within engineering can be closed, such as heightening females’ self-efficacy and providing early STEM experiences. Early engineering experiences include the FIRST (For Inspiration and Recognition of Science and Technology) Programs, where students are …

An Investigation Of Solar Panel Thermal Images Collected From An Unmanned Aerial Vehicle, Ginger Ivy Jo L'Heureux

Dissertations and Theses @ UNI

As the population of the world continues to increase, so does energy consumption. At the same time, available fossil fuels continue to be depleted. Knowing these two facts, there is a need to find additional sources of energy. Photovoltaic panels (solar panels) are front and center of the renewable energy available options.

Exploring the practical use of infrared thermal imaging for data collection and maintenance of photovoltaic panels is the main objective of this study. In this research, three unmanned aerial vehicle (UAV) flights were completed to obtain thermal imaging of the Cedar Falls Utilities Solar Field with various dates …

Arts Integration Into Elementary Science: Force And Motion And Natural Disasters, Eric C. Ooms, Tabitha M. Wu, Ashley R. Kokemuller, Sarah E. Montgomery, Audrey C. Rule

Journal of STEM Arts, Crafts, and Constructions

This study explored the effect of arts integration into science during an instructional unit on force and motion and one addressing natural weather disasters. Seventy-eight elementary students in four classrooms (grade 5, grade 4, and two at grade 3) participated in the study. This study assessed content retention, student-made products (rollercoasters and hurricane shelters), and student attitudes. All students in each classroom experienced the two units of instruction, one unit in the experimental condition of arts integration and one unit in the control condition without arts integration. Both conditions involved students in constructing models of given materials. Each unit consisted …

Second Grade Students Learn About Civil Engineers And Erosion, Andrea Earline Anderson, Jessica A. Meier

Journal of STEM Arts, Crafts, and Constructions

The integration of art into curricula focused on teaching science is a new perspective in education designed to reach a broader range of students. The current study examined the process of second-grade students participating in science and art activities through qualitative content analysis. The subjects of science and art were not taught to the students separately, rather, students engaged in both subjects simultaneously, in an integrated manner. Participants were 23 second-grade students (11 female and 12 male; age range 7 to 8 years) who were learning about erosion through sketching and creative construction and the work of civil engineers through …

Ecosystem Shake Up: An Environmental Change Adaptation Project, Hannah E. Morgan, Dana Atwood-Blaine, Audrey C. Rule

Journal of STEM Arts, Crafts, and Constructions

This practical article reports an intriguing diorama project for third grade elementary students (ages 8-9 years). Students worked as partners to create dioramas of given ecosystems made in pizza boxes. Then, students rolled a die to determine a change in some environmental factor that affected the ecosystem. The students discussed how this change affected the ecosystem and made a second part of their diorama showing the ecosystem after the change. Finally, students made class presentations concerning their dioramas and ideas. A rubric for assessing the projects is included. Results of this science project indicate that students became deeply engrossed in …

Exploring The Physics Of Sound With Steam-Azing Third Graders, Page L. Foss, Kyrie D. Borsay

Journal of STEM Arts, Crafts, and Constructions

This practical article was based on a lesson conducted with third graders from an elementary school in the Midwest who were studying concepts about sound. The lesson activities address Next Generation Science Standards that include engineering concepts, along with integrating activities that support National Core Arts Standards. The students created instruments that made music but that were not the standard string, percussion or wind orchestral instruments that they had previously studied: string, percussion, or wind. Their instruments made of recycled materials included drum and shaker combinations, animal-shaped instruments, and instruments that combined three or more instruments.

Science Through Art: Motivating Gifted And Talented Students, Ksenia Zhbanova

Journal of STEM Arts, Crafts, and Constructions

Gifted and talented students have unique characteristics and needs. Arts Integration is an effective differentiation strategy that helps meeting these students’ needs. STEM subjects are easily and organically integrated with the Arts because scientific and artistic inquiry are very similar. This practical article describes an arts-integrated project that provided the gifted and talented participants with an increased level of challenge, an opportunity for self-expression and for building social skills, amplified motivation, and a chance to deepen and demonstrate their knowledge of science, technology, engineering, mathematics, social studies and English Language Arts. In this project, identified gifted students completed figural transformations …

Editorial: Arts Integration Allows Students The Opportunity To Be Original, Ksenia S. Zhbanova, Audrey C. Rule

Journal of STEM Arts, Crafts, and Constructions

This editorial explores the other six articles in this issue 2 of volume 3 of the Journal of STEM Arts, Crafts, and Constructions to examine how originality is displayed and supported by art projects. Originality, is a quality or a characteristic of an idea, approach or product. Originality can be defined as newness or novelty. To be classified as original, an idea must be new. It does not have to have a utilitarian value, which is a requirement for an idea to be categorized as creative. Helping students develop originality is important because it allows the freedom to make any …

Effect Of Fe Substitution On Structural, Magnetic And Electron-Transport Properties Of Half-Metallic Co2tisi, Juliana Herran, Parashu Kharel, Pavel Lukashev

Research in the Capitol

In recent years, research on magnetic materials has been one of the most technologically appealing developments in materials science. Among other applications, magnetic materials are essential components of data storage and information processing in computer hardware elements, such as hard drives and random access memories. Here, we present a theoretical study of structural, magnetic and electronic properties of ferrimagnetic Co₂Ti_1−xFe_xSi (x = 0, 0.25, 0.5), using density functional calculations. We show that the magnetic moment of Co₂Ti_1−xFe_xSi increases when Ti is substituted with Fe, consistent with experimental findings. …

A Low-Cost Arduino-Based Home Security System, Qi Lu

Annual Graduate Student Symposium

Home security is important for every family, especially for the family which lives in a big house. Because the house is much bigger than apartment or dorm, it is hard for the owner to notice if someone is intruding into their house. On the other hand, the home security systems sell in in the market are usually expensive. To address this problem, a low-cost home security system is designed and implemented. When the system is armed, infrared sensors are used to detect intruders. When a person is detected, sensors will send the signal to the user wirelessly, and indoor alarm …

Exploring Possible Humanoids On Mars: A Lesson Designed For Twice-Exceptional Gifted Students, Younis Al-Hassan, Marie Adebiyi, Shehreen Iqtadar, Dana L. Atwood-Blaine

Journal of STEM Arts, Crafts, and Constructions

This practical article presents a classroom-tested pedagogical plan to assist instructors in teaching thinking skills to gifted students with disabilities in the context of science. The lesson, which focused on using Edward de Bono thinking skills to explore humanoid images that appear in NASA photos, provided accommodations for students with hearing impairment, along with disabilities associated with short and long-term memory. The instructional design team presented the arts-integrated activity of drawing scenes showing possible ways the anomalies could have been generated, and an interactive electronic game using iPads that asked participants to gather needed items for a trip to Mars. …

Faces On Mars Lesson: Incorporating Art, Thinking Skills, And Disability Differentiation Strategies For Twice-Exceptional Gifted Students, Marine Pepanyan, Mike Fisher, Audrey Wallican-Green

Journal of STEM Arts, Crafts, and Constructions

This practical article provides an example art-integrated lesson designed to serve gifted students with the exceptionalities of deficits in executive functioning and in impulse control. The lesson used the mysterious science problem of possible life on Mars as evidenced by anomalous faces in NASA photographs as a stimulus for practice in processing information through three Edward de Bono CoRT Thinking Skills. This lesson demonstrated differentiating instruction for gifted students with disabilities that included hands-on and peer-involved exercises. Examples of student work showing comic book-like stories about the famous Face on Mars are included, along with student responses to the thinking …