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Portable Stage
No full textThe following report details the design, analysis, manufacturing, and testing of the prototype for the Portable Auto-Leveling Stage. Time and labor constraints required the prioritization of crucial safety subsystems over those conceived with performance enhancement in mind. FEA simulations displayed expected results on a fully assembled stage unit, whereas physical testing was run on one of the leg assemblies and the unconstrained stage deck. Wiring and verification of input response came to fruition in a testing system untethered to the physical stage deck
Valve-Tec
No full textThis project explores the feasibility of replacing a traditional camshaft driven system with an electronically actuated camless design for internal combustion engines. The primary motivation is to improve engine efficiency, reduce emissions, and extend the relevance of combustion engines in a future leaning toward electrification. Traditional camshaft systems limit engine responsiveness and efficiency due to fixed valve timing. Our camless solution addresses these limitations by using solenoids controlled by microcontrollers to open and close the valves based on the crankshaft position. We developed a modular prototype that integrates both analog and digital hall effect sensors for crank angle detection, dual microcontrollers for real time control and monitoring, and a solenoid-based actuation system. The system achieved valve timing with an accuracy of 6° to 8° and successfully demonstrated all four strokes of an engine cycle while operating within specified voltage and power constraints. However, the design exceeded intended size limitations and struggled to maintain performance at high RPMs and elevated temperatures. Despite these constraints, the project validates the potential camless systems for small scale engine applications
The relationship between virtual learning during the COVID-19 lockdown and body image disturbances among college students
No full textObjective College students tend to have lower body image than other groups, in part because of comparisons they make with peers. The closing of college campuses due to the onset of the COVID-19 pandemic disrupted the ability to compare; thus, we investigate how the transition to and from virtual-learning influenced body image.
Participants Third- and fourth-year undergraduates (N = 103) at a private university.
Method In Fall 2021, undergraduates retrospectively indicated their frequency of body talk, body surveillance, and restrained eating behaviors before the pandemic, during virtual-schooling, and upon returning to campus.
Results Repeated-measures ANOVAs showed that virtual-schooling was associated with less body surveillance and fewer restrained eating behaviors than pre-COVID; and for students who lived at home (versus with friends), pre-COVID was associated with more body talk behaviors.
Conclusion This study provides insights into how virtual-schooling may mitigate some of the risk factors for body image disturbances
Alva Vanderbilt: life of the week
No full textClimbing to the top of Gilded Age society in 19th-century America, socialite Alva Vanderbilt made headlines for being one of the first elite women to divorce on her terms, and she later turned her ambition – and considerable fortune – to the fight for women’s rights. In today\u27s episode, Nancy Unger tells Elinor Evans about a woman who upended the highest echelons of society, caused scandal and heartache, but ultimately blazed a path from strategic social climber to outspoken suffragist
