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- Creator:
- Watson, Andrea
- Description:
- Photobiomodulation has been shown to reduce pain and expedite wound healing in animals. To determine the influence the canine's age has on the therapeutic effect of photobiomodulation after dental prophylaxis a low energy GaAlInP laser with a continuous 650 nm wavelength and 100 mW power output was used. Owners had the option to enroll their canine (n = 24) in the study if they were receiving an anesthetized dental treatment. During the post-operative recovery, each patient received irradiation (10 J/cm2) as a member of one of three randomly assigned treatment groups. One group (n = 7) received four treatment points of irradiation on the gingiva of the right upper and lower dental arcade, one group (n = 8) received four treatment points of irradiation on the gingiva of the left upper and lower dental arcade, and one group (n = 9) received a mock gingiva treatment without irradiation. Inflammation and erythema along the gingival treatment area of each canine was scored 24 hours after treatment by a blinded veterinary evaluator in person or via photograph. The data from this study indicates a trend of higher evaluation scores with increasing age of the canine patient. The data also illustrates lower evaluation scores for the canine patients who received photobiomodulation therapy following dental prophylaxis.
- Resource Type:
- Student Research, Presentation, Poster, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Hirokawa, Brent, Lim, Jade, Wills, Frank, and Galotra, Rohan
- Description:
- Gecko-like synthetic adhesives (GSAs) are dry adhesives that replicate the function of gecko toepads through their microscopic fibrillar structure. To produce GSA molds, we fabricated Si templates using microsphere lithography. We formed a monolayer of polystyrene microspheres using colloidal self-assembly, then transferred this mask to a Si wafer. Next, we sputtered Au onto the mask and substrate and removed the microspheres using ultrasonication. The resulting Au-patterned Si wafer was exposed to a chemical etch to remove the uncoated material, forming deep pits in the Si surface. This surface structure forms a template for the fabrication of soft polymer molds that can be used to fabricate GSAs.
- Resource Type:
- Student Research, Presentation, Poster, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Smith, Tyler, Hayman, Zachary, Kiani, Cameron, Castaneda, Eduardo, and Gibes, Scott
- Description:
- A project submitted to the Department of Mechanical Engineering in partial fulfillment of the requirements for the B.S. degree. Department of Mechanical Engineering ME 494 and Since the first internal combustion engine was built the design has required a rotating camshaft to mechanically actuate the valve timing. The problem with actuating the valves on an engine with a camshaft is there are many added losses. Turning the camshaft consumes energy from the crankshaft which takes away from the overall power output; also the springs used to close the valves create a large amount of parasitic losses which take away from the engine performance. Some types of camshafts use a rocker arm assembly that requires many extra parts and adds a considerable amount of weight to the engine. Clearly, mechanical valve timing that uses a rotating camshaft has serious flaws; a new design that gets rid of the camshaft and its accessories could revolutionize the internal combustion engine. There are many companies competing to invent camless valve timing for engines, and all of which are at the basic R&D and prototyping stage. There are no camless four stroke engines being produced and sold on the market today. The objective of this project is to enter the camless actuation race and create a camless valve actuator that is driven by the forces from a piezoelectric crystal. Piezoelectric crystals expand when high voltage is applied to them. The expansion displacement is minimal, but the forces produced are impressive, making it undoubtedly possible to actuate the valves of an engine. Designing a new valve actuator that does not use a camshaft is greatly beneficial for many reasons. By eliminating the camshaft and the associated components, the engine design will be less complex, the overall timing components on the engine will weigh less, and the removed spring will reduce parasitic loss. Utilizing piezoelectric crystals and an electronic controller to actuate the valves and control the timing has the potential to increase the engine efficiency up to 20%, increase the potential horsepower up to 20%, and reduce exhaust emissions up to 50%. This technology has the potential to change the industry, and this project summarizes how the Cal Maritime senior capstone Flex Engine team is attempting to break into the camless internal combustion engine market.
- Resource Type:
- Project and Student Research
- Campus Tesim:
- Maritime
- Department:
- Department of Mechanical Engineering
- Creator:
- Coomber, Jeff
- Description:
- In 1918 Humboldt County, California, the United States, and the whole world was faced with one of the deadliest pandemics in history. The Spanish Influenza, or the Spanish Flu, was this pandemic, in less than one year it, killed around 600,000 Americans and millions around the world. Not even isolated Humboldt County could escape the disease. Humboldt County and the nation as a whole were unprepared for such a pandemic due to lack of medical staff, tight quarters in the military training camps, and the increase in traveling during the war. This paper examines the impact the Spanish Flu had on Humboldt County in different ways. First examining the home front and how the flu impacted the towns and cities in Humboldt County. Next the military training camps where the Spanish Flu hit hard is examined to see what men from Humboldt were facing. Finally the influenza's impact in Humboldt is compared to Philadelphia and San Francisco which were two of the worst hit cities in the U.S. by the influenza. While the influenza affected each place differently, in the end all cities and camps were likewise unprepared for the flu and played down the danger of the influenza with disastrous consequences. Humboldt County's cities and towns were no different than most of the United States as they were unprepared and many of the newspapers played down the danger. Like every city, town and camp, Humboldt County was short staffed when the influenza hit, had a press playing down the dangers and was consumed with war fever which was a distraction from the flu. The local governments of Humboldt County however, did take action faster than many other local governments. Even so, the Spanish Influenza had a major impact on Humboldt County, resulting in over 200 deaths and thousands of infected citizens. It would take another generation for Humboldt County, as well as the many areas in the United States affected by the pandemic to recover.
- Resource Type:
- Student Research
- Campus Tesim:
- Humboldt
- Department:
- History