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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
2. Self-Assembled Microsphere Based Lithography of Tmeplate to Fabricate Gecko-Like Synthetic Adhesive
- 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:
- Magat, Paula Marie
- Description:
- Depleting fossil fuels has been an undergoing issue that calls for the attention of many scientists around the world, as the demand for it increases with the increasing population. Thus, various types of renewable energy sources are being studied and evaluated to determine which can accommodate the world's growing demand. For this particular study, biomass-derived substitute for aromatic compounds is being investigated, particularly biomass derived from lignin. Lignin, a complex organic polymer is one of the major components that makes up the structure of plants and wood. If broken down into simpler molecules, lignin could potentially provide a substitute for aromatic compounds, a major constituent of petroleum, which are used in variety of materials. In order to break down lignin into simpler compounds, a catalyst is essential. However, different catalysts break down lignin into different compounds, and another issue associated with biomass-derived materials is the presence of oxygen in the biomass-derived compounds. Whereas, fossil-derived compounds are mainly composed of hydrocarbons. Hence, the goal of the study is to determine whether a molybdenum catalyst can break down lignin into useful aromatics. Our findings along these lines will be discussed.
- Resource Type:
- Student Research, Presentation, Poster, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Quintanilla, Natalie
- Description:
- Fused deposition modeling (FDM) has been a fast-growing 3D printing technology. Many of the parts printed with this technology are composed of acrylonitrile butadiene styrene (ABS). In this study, we evaluate the tensile strength characteristics of 3D printed ABS parts. Specimens with a dog bone geometry were printed using the ASTM D638-14 Standard Test Method for Tensile Properties of Plastics. A flat build orientation was used with varying raster orientation of either 0o or 90o on the build plate. An Instron Tensile Testing machine was used to evaluate the stress-strain characteristics of each specimen and determine Young's Modulus and the yield strength of the parts. Results showed that there was a negligible effect on Young's Modulus and yield strength for the different raster orientations.
- Resource Type:
- Student Research, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Hughes, David
- Description:
- In this poster, I present some of the work that I have done on Apache Spark implementations of randomized Linear Algebra: randomized SVD and randomized QB factorization. The field of randomized Linear Algebra has expanded rapidly in the last decade in response to the challenge of Big Data and the need for computationally efficient solutions in this realm. Probabilistic algorithms that derive a smaller matrix approximation from a higher-dimensional matrix have been shown to have both theoretical and empirical success. I seek to take advantage of the Apache Spark Big Data processing engine, in particular the GraphX library, to efficiently compute these various probabilistic algorithms in a distributed manner. Moreover, GraphX provides the graph-and-data parallel processing abstraction that I attempted to build an effective and scalable solution on top of. Finally, I verify the algorithms in a local manner and benchmark them on a large matrices to demonstrate the correctness and effectiveness of the implementations.
- Resource Type:
- Student Research, Presentation, Poster, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Yang, Stella, Jeabeom, Lee, Huizar, Dante, Thai, Derek, Snelbaker, Chris, Velazquez, Marco, Cañada, Tiras, and Garey, Shawn
- Description:
- Novelty ice cube trays have become even more popular in recent years. Large ice spheres became desirable for their unique shape, aesthetic look, and ability to keep a drink cold without melting and watering it down as quickly as traditional rectangular ice cubes. The task was to find out whether or not 3D Printing could be a viable option for creating novelty or customizable ice cube trays. The problem with 3D Printing is its difficulty with making the printed part watertight while still keeping its unique shape and being able to make sure that it is food-safe. Trays must also be easily mass produced while keeping filament costs low. To ensure that the tray satisfies these criteria, research was done to determine what kinds of the filament, if there are any, that are considered to be food safe. It was found that both PLA (polylactic acid) and PET-G (Polyethylene Terephthalate Glycol) are both considered to be food-safe as both plastics are used for food storage and making disposable water bottles. Polyurethane, a food-safe coating when fully cured, was used to prevent the print from leaking and to keep the ice from sticking to the mold. Once the filament and coatings were determined it became a trial and error on designing a tray that could be customized and that would be watertight while still being easy to open and removing the ice with no difficulty or breakage.
- Resource Type:
- Student Research, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Daudu, Robert
- Description:
- Our continued dependence on crude oil and its products has led to continuous increase in gas price, and most importantly severe damage to the environment. Due to these implications, the search for renewable energy source has never been more imperative. An ideal alternative to this dependence are biofuels whose emissions and cost are lesser than fossil fuel. According to previous studies, some members of the class clostridia can utilize Acetone-Butanol-Ethanol (ABE) fermentation pathway for biofuel production, with Butanol being a direct replacement of gasoline. The goals of this project are to biochemically and genomically compare Clostridium strains utilizing the ABE pathway. To carry out our objectives, animal fecal samples were collected, anaerobically enriched, and cultured on a selective media. After culturing, Clostridium strains were isolated based on morphology and biochemical properties. Species identification is determined by 16S rRNA sequencing.The ABE pathway genes are amplified by PCR. Solvent analysis are done by Nuclear Magnetic Resonance (NMR). Finally, comparative analysis are done on strains utilizing the ABE pathway to check for genomic similarities and differences that might play an important role in their ability to produce biofuel. Our study has identified several butanol producing clostridia, which will be used to further elucidate the relationship between clostridia strains capable of producing biofuels, and may lead to the development of more efficient ways to use microbes for the production of biofuels, and reduce greenhouse gas emissions in the environment.
- Resource Type:
- Student Research, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Lopez, Jimmy, Sherman, Tristan, Haideri, Hana, and Caudle, Mitchell
- Description:
- If UAVs are to be successfully integrated into U.S. national airspace, the ability to perform autonomous collision avoidance between both manned and unmanned aircraft is a necessity. This poster presents a method for collision avoidance utilizing Automatic Dependent Surveillance - Broadcast (ADS-B) transponders which will be required in all manned aircraft by 2020. These devices broadcast and receive global position of all similarly equipped aircraft in a 100-nautical mile vicinity. A Sig Kadet Senior and a Hangar 9 Valiant fixed wing aircraft are used as flight platforms to test autonomous collision avoidance. These aircraft will include ADS-B transponders, a Pixhawk autopilot and an Intel NUC as the primary components of the avionics system. The uniquely developed algorithm is compiled in a Linux environment and uses MAVLink protocols to send off-board commands to the autopilot. The collision avoidance algorithm uses kinematic and circular motion equations to predict the future positions of both aircraft and employ an avoidance maneuver at a constant altitude. This system is demonstrated through simple ground tests, and subsequently moving on to full-system flight tests.
- Resource Type:
- Student Research, Presentation, Poster, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Sarraf, Michelle
- Description:
- Many people seem to embrace the idea of "Finding Your Truth" (FYT), wherein individualism has been extended to what is true and false, and the scientific method is just one way of seeing reality. In three pre-registered studies, we developed a multi-dimensional scale to measure FYT, and political liberals and conservatives evaluated disagreeing scientific (in the form of a researcher) and non-scientific (in the form of a professional or online commenter) perspectives on apolitical topics. Conservatives, compared to liberals, were more welcoming to non-scientific perspectives, an effect mediated by a stronger belief that intuitions are a valid source of truth (one dimension of FYT). However, conservatives and liberals have an equivalent tendency to see reality as subjective (another dimension of FYT), which also predicts endorsement of a science rejecter. The roots and implications of FYT thinking are discussed, including the idea that differences in science acceptance are not due only differences in reasoning ability, but also differences in belief about the nature of truth.
- Resource Type:
- Student Research, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Gonzalez, Edgar
- Description:
- Herpes simplex virus type 1 (HSV-1) infects 47.8% of individuals ages 14 to 49 in the United States. This virus usually causes oral or eye mucosal infections, but is now responsible for nearly half of genital herpes infections. Presently, there is no vaccine to prevent infections. To test the efficacy of a liposomal vaccine containing three epitopes of the HSV-1 gD protein (gD3pep), we developed an HSV-1 intravaginal infection in BALB/c mice by challenging mice (n=5/group) with different concentrations of HSV-1 (F strain). Challenged mice were observed for morbidity and mortality for 11 days. The challenge dose that produced morbidity by day 6 or 7 was selected for subsequent testing with the liposomal gD3pep vaccine containing one of the following adjuvants: MPL, MTP-PE, LT1, or CDN. Phosphate buffered saline (PBS) was the control. Mice (n=14/group) received vaccine subcutaneously d0, d14, and d28. Spleens were harvested d31 (n=7/group) to determine IL-4 and IFN-γ secretion. Mice (n=7/group) were challenged intravaginally d35 with HSV-1 and monitored for morbidity and mortality to d63. Survival was 86% with CDN, 71% with MPL, 57% with MTP-PE, and 14% with both LT1 and PBS. Disease signs and weight loss paralleled survival. IL-4 secreting splenocytes (Th1 response) were significantly higher in MTP-PE and CDN groups (p≥0.0099), while the MPL group had higher IFN-γ secreting splenocytes (Th2 response). CDN, MPL, and MTP-PE adjuvants protected mice against HSV-1 infection, via different immune response mechanisms suggesting that a Th1 or Th2 response can generate protection against genital HSV-1 infection.
- Resource Type:
- Student Research, Presentation, and Abstract
- Campus Tesim:
- Pomona