41530 research outputs found
Sort by
AGED 539 Graduate Internship Report - Pacheco High School
No full textThis internship and project report includes validation documents required in meeting the quality criteria for secondary-level programs of instruction in agriculture. The supporting material includes information to receive state and local funding, outline the goals and objectives of the program, along with an overview of Pacheco High School, the agriculture program, and the community
L’alphabet de Lyon de Bruno Benoit Traducido al español
No full textThis is a translation of the novel L\u27Alphabet de Lyon by Bruno Benoit. It goes into the rich history and culture of Lyon, France
PROVE Primary Battery Structure
Get PDFIn conjunction with Prototype Vehicle (PROVE) Laboratory, our group designed, manufactured, and tested a prototype structure to house the battery boxes for PROVE’s endurance vehicle. Our structure was designed to support the batteries during normal use, and in the event of a front crash. Our design is comprised of a secondary composite box to house the battery boxes, a bottom plate to affix the secondary box to the chassis floor, a horizontal plate fastened to the chassis, and a brace structure welded to the chassis. From the outset, we chose to use a secondary box, the primary battery boxes must be removable, and we could not directly affix supports. In areas of less certainty, such as the number of support or the strength of support methods, we initially used intuition to make decisions, and allowed room for iteration once we had sufficient analysis later in the project.
After developing our initial structure, we created FEM case studies on the full assembly, and used hand calculations to verify our FEM. We were most concerned with the deflection of the front wall in a front 20g crash. We used laminate plate theory in a python algorithm to verify FEM results for the front wall deflection. We found that the brace structure failed in the FEM study. However, we also anticipate redesigning or possibly removing the brace in favor of an additional plate joining the chassis tubes parallel to the front wall.
Our team manufactured layups of carbon fiber sandwich panels and L channels for the secondary structure and bottom plate. We successfully integrated the bottom plate and secondary box. However, due to tolerancing issues and discrepancies between the CAD and the physical vehicle our brace structure requires alteration to be integrated. Threaded inserts were manufactured on a lathe and bonded into the panels to allow for them to be integrated onto the chassis. The secondary structure was manufactured smoothly and could fit onto the chassis, which is a great success. One of the two horizontal plates and braces were water jetted and welded respectively, but they need to be redesigned to properly suit their integration. Additionally, our team characterized the Elastic moduli and Poisson’s ratio of carbon fiber material using tensile and strain gauge testing
Queering/Querying Educational Spaces: The LGBTQIA2+ Learning and Affirming Challenge
Get PDFLegislation regulating learning content and approaches seek to limit exposure to and consideration of non-cis-heteronormative ways of being and knowing (Sawchuk, 2022). Denial of access to a more difference-affirming curricula reinforces hegemonic cultural norms (Chen & Lawless, 2018). Research on the college experiences of LGBTQIA2+ identifying individuals indicates a generally chilly campus climate, recognizing that “colleges and universities have historically been shaped by and for cisgender, straight individuals” (Pryor, 2017, p. 36). Educators can play a key role in reshaping this reality by co-constructing affirming environments where learners can generatively engage with difference and grow their capacities for cultural responsiveness in a multidimensional world of diverse human experiences. This article describes an online, asynchronous program grounded in principles of queer communication pedagogy, that the authors designed as a supportive space to learn, share information, and take action in order to create LGBTQIA2+ affirming learning experiences
Cal Poly CubeSat Lab Next Generation SystemBoard
Get PDFCal Poly CubeSat Lab’s current “SystemBoard” or primary compute board that it flown on their satellites has been flying for over 15 years and is beginning to show it’s age. Many components onboarda are nearing obsolescence and are hard to source for new boards. In this project, the specifications for a new revision of CPCL’s core SystemBoard, named SystemBoard 3.0, were defined and designs were generated for a 1st generation prototype, as well as producing evaluation boards to test the developed subsystems before their integration into a final product. This project was necessary to ensure that CPCL can continue to operate missions without disruptions from discontinued hardware. The new hardware also allowed for new features to be developed to take advantage of improvements in power efficiency and performance, opening the door to missions that may not have been previously possible
Bike Share: A discussion and case study analysis Including recommendations for Cal Poly and the City of San Luis Obispo
Get PDFSince 2015, micromobility has swiftly expanded to new cities across the United States. Micromobility is defined as a category of transportation services that are shared-use, lightweight, and personal use such as electric scooters (escooters), shared bicycles, and electric bicycles (e-bikes). Micromobility vehicles can be person powered, electrically powered, or a combination of the two (CRCOG, 2022; BTS, 2022). One form of micromobility that is gaining popularity is known as bicycle share. In 2020, the North American Bikeshare and Scootershare Association (NABSA) 2020 State of the Industry Report found that an estimated 83.4 million trips were taken in North America alone (Urbanism Next, 2020). Bicycle share is a type of short term vehicle rental service used in cities across the world. The service typically allows users to rent bicycles through a mobile phone app or a kiosk. Users can ride bikes throughout a bike share system\u27s operating area, which is often contained to select, defined locations such as a city’s limits. There are two major types of bike share in the world. The first is docked, which requires docking stations to charge and store the bikes. In this system, a user can pick up a bike at any station and ride and drop it off at any other empty dock station within the system’s network. The second is dockless, which does not require a docking station, and can be parked anywhere. Recently, it has become standard and more affordable for bike share programs to use both shared bikes and scooters as a hybrid or mixed fleet
IVD Delivery System
Get PDFCepheid is a molecular diagnostics company that has assigned our senior project team to design a system that automates the current manual transportation of samples between two laboratory rooms. With the focus of retaining the sanitary integrity of both the samples as well as the initial cleanroom, also referred to as the packaging laboratory, our team has designed an extension of the current passthrough that will contain all other subsystems. In order to automate the transportation of the samples, the design employs a track and trolley system to be purchased and mounted within the passthrough. A verification prototype was built and tested to ensure the design would work as intended, modeling a five-foot section of the entire sixty-foot path. This prototype features an interlocking system to eliminate any potential for backflow between lab rooms. Samples are carried in a hanging bag that the team has designed to not spill any of the cartridge’s contents. Additionally, a virtual model was made and used to perform varying load tests to prove the validity of the materials selected for the passthrough. While effective, the proposed design could be improved in efficiency, though regardless of the decisions made by Cepheid regarding implementation, the designed passthrough extension and interlocking system could be used in any industry backflow prevention scenario
Food Processing and Campus Market (Building 24)
Get PDFThis report provides a prescriptive and performance-based analysis of the Food Processing Building located on Cal Poly’s campus in San Luis Obispo, California. Food science and nutrition classes take place at the facility where faculty and students manufacture food products such as chocolates, jams, and barbecue sauces. The finished products are offered for sale in the building’s mercantile area, known as the Campus Market, in addition to other retail locations around the city. The Food Processing Building is considered mixed use with portions of the building classified as moderate-hazard factory (F-1), moderate-hazard storage (S-1), business (B), mercantile (M), and assembly (A-3) in order from most to least square footage. Originally designed in 1960, most of the building’s fire and life safety systems were based on the code requirements from the 1958 Edition of the Uniform Building Code (UBC). Construction was completed in 1962, and the existing store area was expanded in 1998. The Food Processing Building’s fire and life safety systems were checked for prescriptive compliance with the 2022 Editions of the California Building Code (CBC) and California Fire Code (CFC). The prescriptive analysis includes the means of egress, fire alarm and detection, fire suppression, structural fire protection, flammability, and smoke control. Additionally, since the building is nonsprinklered, a proposed design for an automatic sprinkler system is provided. The building meets the prescriptive requirements for exit capacity, number and arrangement of exits, exit access travel distances, fire detection, allowable height and number of stories, and fire separation distance. Other prescriptive requirements require field verification to check for code compliance. Deficiencies were found regarding common path of travel, allowable area, and visible notification coverage. The loading dock on the north side of the building relies on occupants using a step ladder to reach the sidewalk, which disqualifies it from being considered an exit. Subsequently, this creates an issue where the common path of travel from the northeast corner of the building exceeds the maximum allowed by code. Furthermore, the building far exceeds the allowable area for a nonsprinklered, F-1 occupancy. The final breach of prescriptive code is the visible notification within the mercantile area of the building does not provide adequate coverage. Occupant safety is the primary objective for the performance-based analysis. Three design fires scenarios were considered including a cooking fire in the kitchen, an industrial equipment fire during manufacturing, and a storage room fire. The storage room fire was determined to be the highest risk to occupant safety because of smoke spilling into the interior corridor that serves many adjoining rooms and spaces. This design fire scenario impacts the largest number of occupants and quickly impedes egress. Tenability criteria were defined for toxicity, temperature, and visibility which were analyzed through fire modeling to determine the available safe egress time (ASET). Occupant evacuation time was determined through egress modeling in order to calculate the required safe egress time (RSET). Visibility in the corridor drops below the tenable limit around 110 seconds which is considered the ASET. On the other hand, RSET was calculated to be 303 seconds, which is comprised of the detection time, notification time, pre-movement time, and evacuation time. Quantitatively, since ASET is 193 seconds less than RSET, the performance-based analysis concludes that the Food Processing Building’s fire and life safety systems do not maintain a tenable environment long enough for occupants to evacuate safely. Recommendations are provided to address the prescriptive deficiencies as well as improve the results of the performance-based analysis. Constructing a small exterior staircase at the north loading dock is the simplest solution for the common path of travel issue from the northeast corner. However, installing a sprinkler system will increase the maximum common path of travel to 100 feet, while also increasing allowable area for an F-1 occupancy to 48,000 square feet, thereby solving both deficiencies. Additional strobes should be installed in the Campus Market to cover the areas lacking visual notification. The performance-based analysis suggests that replacing the plastic pallets with wood pallets will significantly decrease the fuel load in the storage rooms. If a sprinkler system were installed and the plastic pallets removed, the heat release rate of the design fire will decrease, resulting in less smoke generation and more time available for occupants to evacuate via the corridor
Failure Analysis of Variably Sized 4340 Steel Mandrels Utilized in the Production of Seamless Superalloy Rings through the Vertical Ring Rolling Process
Get PDFVertical ring rolling is a forging process which forms seamless metal rings through applying a large force at elevated temperatures onto component materials stabilized by cylindrical mandrels. Carlton Forge Works, a company which produces rings of superalloy materials such as INCO718 and 718Plus, is experiencing a consistent failure of mandrels due to extreme conditions. An analysis of the lifetime (bulk material, heat treatment, and use) was performed, which aided in the identification of process variables tied to mandrel failure. Experiments were formed surrounding three variables of the mandrel heat treatment: Austenitization temperature, quenching temperature, and tempering conditions, with the goal of analyzing the degradation of mandrels prior to failure with hardness measurements. Rockwell Hardness C (HRC) was used in each of the three experiments. The first experiment assessed incomplete austenitization due to overcrowded furnaces at 1400˚F and 1550˚F. Secondly, quenching for 10 minutes at 70˚F, 100˚F and 150˚F, was performed to simulate quench vat conditions. Finally, extra tempering at 300˚F, 400˚F, 500˚F, 570˚F, 700˚F, 900˚F and 1400˚F was performed to replicate over-tempering of the mandrels during rolling. Hardness degradation below the HRC range of superalloy rings (35-40 HRC) was used to numerically fit the lifetime of components and propose solutions for mandrel failure
Weed Robot
Get PDFTeam Weed Scouts has completed our work on a weed-cutting robot for the Girl Scouts of California’s Central Coast. The final robot build provides a solid foundation that can be built and improved upon by future teams. We have completed the robot base and structure, including the chassis, drivetrain, and robot shell. We also completed manufacturing a weed storage bin and canvas cover for the robot. Additionally, we have built a weed scooper, the mechanism that cuts weeds and transports them into a storage compartment. The electronics and programming for remote control of the robot are also implemented. After some testing, we found that the robot had limited functionality. It was able to drive around with slight power issues but unfortunately, the weed scooper was not able to fully cut and transport the weeds. Despite these obstacles, we have created a semi-operable foundation for future teams to optimize, test, and debug. The next steps include adding a weed shredder and developing autonomous robot functionality along with weed identification. Upon project completion, the weed-cutting robot will help maintain the grounds at Camp Arnaz and serve as a source of engineering inspiration for Girl Scouts and other camp visitors