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- Creators: Mechanical and Aerospace Engineering Program
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Description
Undergraduate teacher preparation programs face scrutiny regarding pre-service teachers' preparation upon graduation. Specifically, scholars contend that teacher preparation programs do not adequately prepare pre-service teachers to plan for effective instruction. Situated in the Mary Lou Fulton Teachers College at Arizona State University, this action research study used the Theory of Pedagogical Content Knowledge to examine (a) how pre-service teachers developed unit planning practices using the Backward Design framework and (b) the pedagogical teaching practices used as they implemented the unit plan in the classroom. During the student teaching course, pre-service teachers received instruction on how to use the Backward Design framework to plan a unit of instruction to implement in their placement classroom. Results from the mixed-methods study provided evidence that Backward Design was an effective way for pre-service teachers to plan instruction. Results from the study indicated that implementing and reflecting on lessons taught from the unit plan contributed to the pedagogical teaching practices used in the classroom. Furthermore, results demonstrated that designing, implementing, and reflecting on the unit plan contributed to a shift in how participants viewed themselves. Through the study, they began to view themselves more as a teacher, than a pre-service student teacher. Keywords: teacher preparation programs, unit planning, instructional practices
ContributorsBoozer, April (Author) / Carlson, David (Thesis advisor) / Barnard, Wendy (Committee member) / Holmes, Shaun (Committee member) / Arizona State University (Publisher)
Created2014
Description
Mentor teachers have a significant impact on pre-service teachers. Unfortunately, mentors are often underprepared for their role, and thus, the potential learning from a student teaching experience is not maximized. Mary Lou Fulton Teachers College at Arizona State University provides training to mentors who host pre-service teachers during their student teaching experience. Training is delivered in two formats: online prior to the start of the semester and face-to-face each month throughout the semester. This action research study looked at how training contributes to mentor understanding and actions in supporting teacher candidates and how mentor support impacts teacher candidate performance. The study included two mentor/teacher candidate dyads and one university site coordinator. Qualitative and quantitative data were collected from a variety of sources including observations of mentor trainings, teacher candidate lessons, and coaching conversations. Additional data sources included semi-structured interviews with mentors, teacher candidates, and the site coordinator. Analysis of data found that training may contribute to mentor understanding, but other factors matter too. The data also indicated that current training is insufficient at producing all desired mentor behaviors. With respect to the ways that mentors support teacher candidates, this study found that mentors play a multifaceted role, provide ongoing feedback, and employ various strategies during coaching conversations. This study found mentors help teacher candidates see their performance through the eyes of an experienced educator. Modeling and coaching helped teacher candidates improve. This study also suggests a positive, professional relationship between mentor/mentee and certain teacher candidate characteristics such as openness to feedback facilitate learning from a mentor.
ContributorsBorden, Ryen (Author) / Carlson, David (Thesis advisor) / Barnard, Wendy (Committee member) / Rojas, Michelle (Committee member) / Arizona State University (Publisher)
Created2014
Description
Peer learning is one of the longest established and most intensively researched forms of learning. As a form of peer learning, peer tutoring is characterized by specific role-taking as tutor or tutee with high focus on curriculum content. In the late 18th century, Andrew Bell undoubtedly became the first person in the world to use peer tutoring in a systematic fashion within a school setting. Due to its miraculous success, Bell affirmed that peer tutoring was the new method of practical education and was essential to every academic institution. Early in American education, teachers relied on certain students to teach others (i.e., peer tutoring) but this occurred on an informal, impromptu, as needed basis. This type of peer tutoring lasted well into the 20th century. A recent change in the traditional face of peer tutoring arrangements for U.S. schools has occurred due to more than 30 years of research at four major tutoring centers. Peer tutoring has moved away from an informal and casual approach to a more formal and robust method of teaching and learning. However, at the researcher's high school, peer tutoring was still very casual, informal, and practically non-existent. Consequently, the researcher created a peer tutoring club, and developed, and implemented a peer tutoring program. The researcher conducted a mixed-methods study with design-based research (DBR) as the preferred research design in order to discover what constitutes an ideal peer tutor and an ideal peer tutoring session. The researcher utilized qualitative means to analyze the following data: 1) field notes, 2) impromptu interviews, 3) questionnaires, 4) focus group interviews, and 5) a semi-structured interview. The researcher utilized quantitative means to analyze the following data: 1) sessions tutored survey and 2) archival data (e.g., daily attendance, school records). Analysis of qualitative and quantitative data suggested that the ideal peer tutor was qualified (e.g., desire, character traits, content mastery), trained (e.g., responsibilities, methodologies, procedures), and experienced. Likewise, in addition to having an ideal peer tutor, an ideal peer tutoring session took place in an environment conducive to learning and tutees were prepared and actively participated.
ContributorsJohnson, Brian (Author) / Carlson, David (Thesis advisor) / Barnard, Wendy (Committee member) / Moore, David (Committee member) / Arizona State University (Publisher)
Created2014
Description
In an effort to better prepare K-12 students for college and career readiness, Advancement Via Individual Determination (AVID) has created a college and career readiness system that is implemented in schools across the United States and in many international locations. Part of this system of schoolwide transformation, is the AVID Elective class, designed for students in the academic-middle. In the AVID Elective, students are supported in their efforts to attend four-year universities. A critical aspect of the AVID Elective class is the weekly implementation of AVID Tutorials, ideally led by trained college tutor/mentors.
The purpose of this action research study is to investigate support structures of AVID Tutors beyond the current tutor training system, in order to see how additional methods can contribute to continual improvement of the tutor training system. Findings from this study indicate that expanding current tutor-training practice to include a blended-learning, on-the-job model, might be beneficial for AVID Tutors and AVID Students.
Through a mixed methods action research study, both qualitative and quantitative data collection tools were employed to help understand the effect of additional tutor training supports. Interviews, tutor assignments, observations of tutorials, and pre- and post-tests provide the bulk of the data studied. Further, this study could provide critical information for key AVID stakeholders who seek to offer training to tutors in AVID.
The purpose of this action research study is to investigate support structures of AVID Tutors beyond the current tutor training system, in order to see how additional methods can contribute to continual improvement of the tutor training system. Findings from this study indicate that expanding current tutor-training practice to include a blended-learning, on-the-job model, might be beneficial for AVID Tutors and AVID Students.
Through a mixed methods action research study, both qualitative and quantitative data collection tools were employed to help understand the effect of additional tutor training supports. Interviews, tutor assignments, observations of tutorials, and pre- and post-tests provide the bulk of the data studied. Further, this study could provide critical information for key AVID stakeholders who seek to offer training to tutors in AVID.
ContributorsGarcia, Michael B (Author) / Kulinna-Hodges, Pamela (Thesis advisor) / Carlson, David (Committee member) / Johnston, Dennis (Committee member) / Arizona State University (Publisher)
Created2018
Description
The purpose of this study was to observe the effectiveness of the phenylalanyl arginine β-naphthylamide dihydrochloride inhibitor and Tween 20 when combined with an antibiotic against Escherichia. coli. As antibiotic resistance becomes more and more prevalent it is necessary to think outside the box and do more than just increase the dosage of currently prescribed antibiotics. This study attempted to combat two forms of antibiotic resistance. The first is the AcrAB efflux pump which is able to pump antibiotics out of the cell. The second is the biofilms that E. coli can form. By using an inhibitor, the pump should be unable to rid itself of an antibiotic. On the other hand, using Tween allows for biofilm formation to either be disrupted or for the biofilm to be dissolved. By combining these two chemicals with an antibiotic that the efflux pump is known to expel, low concentrations of each chemical should result in an equivalent or greater effect on bacteria compared to any one chemical in higher concentrations. To test this hypothesis a 96 well plate BEC screen test was performed. A range of antibiotics were used at various concentrations and with varying concentrations of both Tween and the inhibitor to find a starting point. Following this, Erythromycin and Ciprofloxacin were picked as the best candidates and the optimum range of the antibiotic, Tween, and inhibitor were established. Finally, all three chemicals were combined to observe the effects they had together as opposed to individually or paired together. From the results of this experiment several conclusions were made. First, the inhibitor did in fact increase the effectiveness of the antibiotic as less antibiotic was needed if the inhibitor was present. Second, Tween showed an ability to prevent recovery in the MBEC reading, showing that it has the ability to disrupt or dissolve biofilms. However, Tween also showed a noticeable decrease in effectiveness in the overall treatment. This negative interaction was unable to be compensated for when using the inhibitor and so the hypothesis was proven false as combining the three chemicals led to a less effective treatment method.
ContributorsPetrovich Flynn, Chandler James (Author) / Misra, Rajeev (Thesis director) / Bean, Heather (Committee member) / Perkins, Kim (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
An in-depth analysis on the effects vortex generators cause to the boundary layer separation that occurs when an internal flow passes through a diffuser is presented. By understanding the effects vortex generators demonstrate on the boundary layer, they can be utilized to improve the performance and efficiencies of diffusers and other internal flow applications. An experiment was constructed to acquire physical data that could assess the change in performance of the diffusers once vortex generators were applied. The experiment consisted of pushing air through rectangular diffusers with half angles of 10, 20, and 30 degrees. A velocity distribution model was created for each diffuser without the application of vortex generators before modeling the velocity distribution with the application of vortex generators. This allowed the two results to be directly compared to one another and the improvements to be quantified. This was completed by using the velocity distribution model to find the partial mass flow rate through the outer portion of the diffuser's cross-sectional area. The analysis concluded that the vortex generators noticeably increased the performance of the diffusers. This was best seen in the performance of the 30-degree diffuser. Initially the diffuser experienced airflow velocities near zero towards the edges. This led to 0.18% of the mass flow rate occurring in the outer one-fourth portion of the cross-sectional area. With the application of vortex generators, this percentage increased to 5.7%. The 20-degree diffuser improved from 2.5% to 7.9% of the total mass flow rate in the outer portion and the 10-degree diffuser improved from 11.9% to 19.2%. These results demonstrate an increase in performance by the addition of vortex generators while allowing the possibility for further investigation on improvement through the design and configuration of these vortex generators.
ContributorsSanchez, Zachary Daniel (Author) / Takahashi, Timothy (Thesis director) / Herrmann, Marcus (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / W.P. Carey School of Business (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
The objective of this project was to design an electrically driven centrifugal pump for the Daedalus Astronautics @ASU hybrid rocket engine (HRE). The pump design was purposefully simplified due to time, fabrication, calculation, and capability constraints, which resulted in a lower fidelity design, with the option to be improved later. The impeller, shroud, volute, shaft, motor, and ESC were the main focuses of the pump assembly, but the seals, bearings, lubrication methods, and flow path connections were considered as elements which would require future attention. The resulting pump design is intended to be used on the Daedalus Astronautics HRE test cart for design verification. In the future, trade studies and more detailed analyses should and will be performed before this pump is integrated into the Daedalus Astronautics flight-ready HRE.
ContributorsShillingburg, Ryan Carl (Author) / White, Daniel (Thesis director) / Brunacini, Lauren (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
Human habitation of other planets requires both cost-effective transportation and low time-of-flight for human passengers and critical supplies. The current methods for interplanetary orbital transfers, such as the Hohmann transfer, require either expensive, high fuel maneuvers or extended space travel. However, by utilizing the high velocities of a super-geosynchronous space elevator, spacecraft released from an apex anchor could achieve interplanetary transfers with minimal Delta V fuel and time of flight requirements. By using Lambert’s Problem and Free Release propagation to determine the minimal fuel transfer from a terrestrial space elevator to Mars under a variety of initial conditions and time-of-flight constraints, this paper demonstrates that the use of a space elevator release can address both needs by dramatically reducing the time-of-flight and the fuel budget.
ContributorsTorla, James (Author) / Peet, Matthew (Thesis director) / Swan, Peter (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
This thesis evaluates the viability of an original design for a cost-effective wheel-mounted dynamometer for road vehicles. The goal is to show whether or not a device that generates torque and horsepower curves by processing accelerometer data collected at the edge of a wheel can yield results that are comparable to results obtained using a conventional chassis dynamometer. Torque curves were generated via the experimental method under a variety of circumstances and also obtained professionally by a precision engine testing company. Metrics were created to measure the precision of the experimental device's ability to consistently generate torque curves and also to compare the similarity of these curves to the professionally obtained torque curves. The results revealed that although the test device does not quite provide the same level of precision as the professional chassis dynamometer, it does create torque curves that closely resemble the chassis dynamometer torque curves and exhibit a consistency between trials comparable to the professional results, even on rough road surfaces. The results suggest that the test device provides enough accuracy and precision to satisfy the needs of most consumers interested in measuring their vehicle's engine performance but probably lacks the level of accuracy and precision needed to appeal to professionals.
ContributorsKing, Michael (Author) / Ren, Yi (Thesis director) / Spanias, Andreas (Committee member) / School of Mathematical and Statistical Sciences (Contributor) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
This research project will test the structural properties of a 3D printed origami inspired structure and compare them with a standard honeycomb structure. The models have equal face areas, model heights, and overall volume but wall thicknesses will be different. Stress-deformation curves were developed from static loading testing. The area under these curves was used to calculate the toughness of the structures. These curves were analyzed to see which structures take more load and which deform more before fracture. Furthermore, graphs of the Stress-Strain plots were produced. Using 3-D printed parts in tough resin printed with a Stereolithography (SLA) printer, the origami inspired structure withstood a larger load, produced a larger toughness and deformed more before failure than the equivalent honeycomb structure.
ContributorsMcGregor, Alexander (Author) / Jiang, Hanqing (Thesis director) / Kingsbury, Dallas (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05