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Lecture: Impactful Women and Their Contributions in Ellensburg History
Get PDFJulia Stringfellow, Professor and University Archivist at Central Washington University, will speak on “Impactful Women and Their Contributions in Ellensburg History.” The event is free, open to the public, but seating will be limited. About the Lecture
About the Lecture: Julia Stringfellow, Professor and University Archivist at Central Washington University, will share her research from a Sabbatical she took in 2023 that focused on Ellensburg and Central Washington University impactful women and their contributions. Women discussed in this lecture include the “mother of Ellensburg,” the wife of the first Ellensburg mayor, the first African American female minister of Ellensburg, and the namesake of Hebeler Hall at CWU that promoted active education and learning of children in Ellensburg and nation Hebeler Hall at CWU that promoted active education and learning of children in Ellensburg and nationwide.
About the Speaker: Julia Stringfellow has served as Professor and University Archivist at Central Washington University since 2015. She served as department chair of the library faculty from 2015-2020. Prior to coming to CWU, Stringfellow was an archivist/librarian at Boise State University. She holds a master\u27s degree in library and information science and a master\u27s degree in history from the University of Wisconsin, Milwaukee. She became a Certified Archivist (C.A.) in 2011. Her favorite location in Ellensburg is the Local History Room at the Ellensburg Public Library. In addition to researching local history, she also enjoys serving as a tour guide for the Kittitas County Historical Museum’s pub crawl tours
Chuck Zimchek Video Interview
No full textChuck Zimchek talks about his work as a teacher, and later a school counselor on the Oregon coast. He then came to Central and worked for many years as a career counselor. He discusses memorable colleagues and how he enjoyed working with students at Central over the years.https://digitalcommons.cwu.edu/cwura_interviews/1316/thumbnail.jp
The Mystification of Gender Affirmation: Galathea, Gender, and Fantasy
Get PDFJohn Lyly\u27s Galatea centers the role that gender expression plays in both communal interactions and interpersonal relationships. I argue that the way in which Galatea and Phillida present themselves within the play parallels the modern interpretation of transgender theory as outlined by Judith Butler. The actions that the two take are in service of manufacturing the kind of gender expression that breaks from conventional norms. While still rooted within fundamentalist dynamics, Lyly breaks free of bioessentialist understandings of gender in favor of a more liberating approach
Ethan Bergman Video Interview
No full textEthan Bergman talks about his job as a faculty member at Central Washington University in the Health Sciences Department for 35 years. He discusses his early college career and degrees in biology and coaching baseball before hitchhiking around Europe. He also talk about teaching high school biology before getting his PHD at Washington State then coming to Central. He mentions changes in education over time and how things have changed.https://digitalcommons.cwu.edu/cwura_interviews/1313/thumbnail.jp
RC Baja Car Drivetrain & Chassis
Get PDFThe object of this report is to design, manufacturer, and build an RC Baja Car to compete in the annual ASME RC Baja Competition.
In order to design, manufacture, and build the RC Baja Car, various methods and approaches are utilized throughout to meet the specified criteria of the competition along with the teams’ personal requirements. Initially, after an overall design was acquired, analysis is done to ensure a working device. Analysis such as power requirements to verify the motor will meet ROAR requirements and suffice for the 4wd system utilized in the device. Statics and dynamics analysis are utilized on individual components accounting for the overall weight to ensure the device withstands all forms of testing along with the abuse of the competition. In addition, decision matrices and material research are conducted to certify the best material is chosen for device. Next the manufacturing methods utilized such as, 3D printing for the chassis and differential housing’s along with machining for the drivetrain components are performed in order to assemble/build and test the RC Baja Car.
Testing of the device shows to meet the specified requirements along with competitively competing in the competition. The RC Baja Car is capable of achieving 15 mph in 5 seconds. Each component of the device is able to withstand the torque the car experiences underload when achieving maximum speed off 22.5 mph. The chassis of the RC Baja Car does not deflect more than 5/16 of an inch during testing and standard driving
Articulating Balsa Wood Bridge
Get PDFThis report describes the design, construction, and testing of a small-scale articulating balsa wood bridge that allowed passage over normally impassable terrain. The bridge was required to span a 400mm gap, while also articulating the midpoint of the bridge 140mm above its resting position. The bridge also needed to support a 20kg (44 lbs.) point load in the center of the bridge, and the bridge and articulation tower together needed to weigh less than 85 (0.19 lbs.) grams.
To construct the bridge, statics and mechanics of materials was used to design a truss that was calculated to support the load with a safety factor of 1.25. An articulation tower was constructed, and string was attached from the bridge to a motor that allowed the bridge to be raised. A switch on the motor allowed the motor to articulate the bridge up and down. All bridge and tower members were constructed using balsa wood and wood glue. The parts were manufactured by measuring and cutting stock balsa wood to length.
Once constructed, the final weight of the bridge was 79.5 grams and spanned 429mm in length. The bridge was able to hold 634.01 N (64.7 kg) before failure. Under a 19.4 kg load none of the truss members experienced fracture. The bridge articulated 155 mm above its resting position and articulated to its max height in 0.97 seconds
The Tortuga Drivtrain and Chassis RC Baja
Get PDFThe students in charge of the project, seniors at Central Washington University were tasked with the design and manufacturing of the RC Baja to compete in the Slalom and Sprint event and the Baja event where the maneuverability and acceleration are demonstrated. The project was divided between Roberto, in charge of the drivetrain and chassis and Rogelio, in charge of the steering and suspension. There were also various requirements like velocity and deflection, ensuring the device reaches 30mph and keeping the deflection of components to a minimum and many others which can be seen in section D of the introduction.
The RC vehicle was designed using various engineering methods using subjects such as mechanical design, dynamics and mechanics of materials to ensure that the device was going to meet requirements. The main manufacturing method was 3D printing as the intention was to keep the weight as minimal as possible. Once all manufacturing and analysis was completed, various tests were performed to gather data on various aspects of the vehicle like acceleration and velocity.
The 3D printed components were required to not exceed a deflection of .1”. The vehicle was expected to achieve a velocity of 30mph, and the suspension was calculated to compress .5” while the turning radius which was expected to be 4’. In summary, with the testing, it was possible to determine that the vehicle would be meeting the various requirements like the velocity and showed that it would also withstand the drop test as was intended
A Comparison of Sediment Accumulation Effectiveness Behind Beaver Dam Analogues, One Rock Dams, And Post-Assisted Log Structures on East Foster Creek, Douglas County, WA
Get PDFWaterways are valuable resources for communities and habitats, but are subject to degradation in the form of incision. This is a type of streambed erosion where streams narrow and deepen. Sediment control dams were placed on East Foster Creek in Douglas County, WA to control incision following the 2020 Pearl Hill fire. This study examined sediment capture in the ponds behind these dams, which included beaver dam analogues (BDAs), one rock dams (ORDs), and post-assisted log structures (PALS). Sediment capture may be influenced by several factors, including dam type, height, width, distance between dams, vegetation, land use, topography, soil type, and study area. The goal of this was to provide information that can be used for future dam installation decisions.
Sediment capture was measured from transects placed in ponds that created quadrats. Sediment volume was determined as 1) total sediment volume per measured pond and 2) mean sediment volume per quadrat. Based on the results, all dams captured sediment, but amount varied by factor. The results suggested dam type had no significant influence on sediment capture, but dam placement impacted sediment capture efficacy. A positive correlation was observed between distance from nearest upstream dam and total sediment volume per measured pond. Additionally, vegetation density was found to have declined since the fire. Furthermore, sediment capture increased downstream of a bridge in the upper study area. Distance from WA Highway 17 was negatively correlated with sediment capture. However, mean channel bank slope angle positively correlated with sediment capture. Pond size was positively correlated with total sediment volume per measured pond. Of the soil textures present, dams placed on finer soils had the most sediment volume capture. Finally, the lower and upper study areas had significant differences in mean sediment volume per quadrat. These findings suggest that resource managers can improve sediment capture and incision reduction by placing dams in areas with erosive sediments and steep slopes similar to those in this study
RC Baja Drivetrain and Chassis
Get PDFThe RC vehicle comprises 4 crucial subsystems: the chassis, drivetrain, suspension, and steering. This paper will cover the chassis and drivetrain, and my partner Noah Stevens will cover the suspension and steering. The chassis serves as a robust framework housing all vehicle components, while the drivetrain transmits power from the motor to the wheels, propelling the vehicle. An efficient drivetrain typically sacrifices speed for enhanced torque, aiming to minimize energy losses. Meanwhile, an ideal chassis features minimal deflection and user-friendly mounting points. This RC vehicle participated in the CWU RC Baja competition, aiming to rank among the top contenders.
The student conducted a range of analyses that formed the basis of their engineering project. Statics, Mechanical Design, and Dynamics were the primary methods employed in the report. These analyses served to guide the student in designing parts to meet specified requirements when assembled. Following the design phase, manufacturing took place utilizing CNC machines, a Horizontal Bandsaw, Lathe machine, Mill machine, and 3D printing. Subsequently, the testing phase commenced, during which the student evaluated how well the vehicle\u27s components met the testing criteria.
The project resulted in a fully functional vehicle capable of competing, and potentially excelling, in the RC Baja competition. The vehicle demonstrated great acceleration, braking, and maneuvering abilities in both forward and reverse directions. Both the suspension and chassis proved resilient, enduring the challenges presented during both the competition and testing phases. Notably, from a stationary position, the vehicle achieved a top speed of 25mph within a 50-meter distance.
Keywords: engineering, RC Baja, analyse
Impact of the Use of Nutrition Information on Glycemic Control in Adults with Diabetes
Get PDFThe purpose of this study is to examine the association between glycemic control in adults with diabetes and the use of nutrition information (NI). A cross-sectional design evaluated adults with diabetes from the 2009-2010 and 2017-2020 NHANES databases. Use of NI was quantified based on the subject’s use of the Nutrition Facts Label, use of calorie information at restaurants, and use of either the USDA Food Guide Pyramid or My Plate. Glycemic control was established if the subject’s hemoglobin A1C concentration was 7.0% or lower. SAS Software (v. 9.4) was used for all statistical analysis. Differences between prevalences were established using chi-square analysis. Odds-ratios for good glycemic control and the extent of use of NI and other relevant covariables were established using simple and multi-variable logistic regression analysis. Statistically significant differences were established if p-values were wer