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- Creator:
- Lomeli, Albert
- Description:
- GMA 460L - Senior Seminar Research Lab and The developments in the shipping industry have grown significantly in past decades. California's ports are responsible for over fifty percent of the nation’s container cargo volume. The ports must quickly advance to maintain their role in the global supply chain. The purpose of this thesis is to analyze multiple challenges facing California's ports and provide specific policy recommendations that would best address the challenges. The challenges analyzed include Intermodal issues, the Panama Canal expansion, regional ports/ trade wars, labor relations, and the cost of doing business in California.
- Resource Type:
- Poster
- Campus Tesim:
- Maritime
- Department:
- Global Studies and Maritime Affairs
- 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:
- Poster, Abstract, Presentation, and Student Research
- Campus Tesim:
- Pomona
3. Self-Assembled Microsphere Based Lithography of Tmeplate to Fabricate Gecko-Like Synthetic Adhesive
- Creator:
- Wills, Frank, Hirokawa, Brent, Lim, Jade, 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:
- Poster, Student Research, Presentation, 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, Poster, 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, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Haideri, Hana, Caudle, Mitchell, Sherman, Tristan, and Lopez, Jimmy
- 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, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Traylor, Allison, Vagenas, Christina, and Christensen, Rachel
- Description:
- There are over 400 different breeds of the domestic horse (Equus ferus caballus), each selectively bred for a purpose. Breed differences frequently result in a distinctive gait, or body movement. Individual horses may also have gait variations that differ from other members of that breed. When put under a saddle, these gait movements result in an altered experience for the rider, with some gaits causing increased jostling or rider movement. The utility of a horse for a specific assisted therapy discipline is dependent, in part, on the impact, or bounce factor experienced while riding that horse. We analyzed the gait of horses and created a formula to predict, based on the gait, the degree of bounce factor that would be experienced on that horse. This formula will allow breeders, riders, and trainers working with a horse to quickly and objectively select the discipline best suited for that horse without needing to ride, and subjectively assign the horse to a discipline.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Lee, Yoo Jin
- Description:
- An important factor of typography is the rules that dictate good type treatment. This, however, does not mean good design. My project is a book I created that shows my journey to find the perfect form of typography and how I come to achieve perfection. This books shows the research I've put in to create the perfect form of typography as a designer. The book is an in-depth exploration of typographic nomenclature and its application to live copy, grid systems, and complex hierarchy. Composition is explored, from simple to complex text type, as an avenue for expressive typography.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Rivera, Ernie, Herrera, Antonio, Llacsa, Karen, and Ozen, Emre
- Description:
- Unmanned Aerial Systems (UASs) can be cost effective and efficiently used for indoor search and rescue missions. These environments pose dangerous and risky scenarios for rescue personnel. UASs can locate and assist victims that are in need during the event of natural disaster with increased safety and low response time, without posing any danger to the rescuers. However, the lack of GPS signal in the indoor environments poses many difficulties for the use and navigation of these systems. A team from Cal Poly Pomona is using two small unmanned aerial systems, one for search and another for rescue, that can help mitigate this problem. The search UAS, a quadcopter, uses a front-facing camera for the detection of victims, a Pixhawk flight controller, and ultrasonic sensors for collision detection. Using computer vision and machine learning, the search quadcopter navigates through the indoor environments and identifies survivors of disaster, and then relays this information to the rescue UAS, also a quadcopter, via a ground control station (GCS). The rescue quadcopter then navigates to the location of the victim and releases the payload. The use of multiple unmanned aerial systems, allow for smaller, lighter, and more agile vehicles to perform better distribution of tasks. This presentation will discuss how the UASs will be able to fly autonomously within GPS-denied environments while detecting victims using artificial neural networks.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Wu, Ruifan
- Description:
- machine learning is an idea that feeding data to the machine model and it builds it own logic based on the data, and thus is able to generate results that approximate the aimed result. In this visual preference research, the goal is to train a machine model that can recognize people's faces. The model is named ResNet50, which is a Deep Convolutional Network model that is used to perform image classification task. The dataset includes 5500 people's face images that have a score of 1 through 5 of how attractive they are. Through using python, the dataset is preprocessed and the machine model is feed with those images. After 30 epoch of training and 200 times of validation set, the ResNet50 is able to score human face that closely approximates the scores of images were tagged.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Sanabria, Brandon
- Description:
- Oxidation is a corrosion phenomenon where metals degrade by reacting with their surrounding environment. There is always a need for better and more durable metals that can be used to create load-bearing structures. The objective of this project was to expose steels with different carbon contents to air at various temperatures and to analyze the microstructures of the oxidized materials. This analysis is expected to yield insights into the oxidation behavior. This presentation will report on the results of oxidation experiments on different carbon steels and microstructures obtained using optical and scanning electron microscopy will be presented. The effect of carbon content on the oxidation resistance of carbon steels will be reported. Learning outcomes and skills obtained as a result of this summer research experience will also be mentioned.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Phan, Ngu
- Description:
- Nuclear power now provides 11% of the world's electricity and is expected to be the main alternative energy in the near future. The process is highly efficient, but the fuel rod efficiency could be improved. During fission of the fuel rod, lower- mass elements including lanthanides are produced. The separation of lanthanides from actinides would improve energy generation and increase the lifespan of the fuel rod. Separation is challenging because of similar chemical properties of lanthanides and actinides, so there is interest in developing new separation methods. This work investigated the effects of redox-active ligands bound to lanthanides to tailor electronic properties for separation. The synthetic and structural chemistry of gadolinium and holmium catecholates were previously reported, but were synthesized under argon and with water as a solvent. For this research, the synthesis of gadolinium catecholates was tested under oxygen (tabletop) or under anaerobic conditions (argon) and with varying the solvent from water to methanol. Toluene-3,4-dithiol and benzene dithiol were also investigated as potential ligands. Initial findings indicated that different products were synthesized when the reaction was carried under air as opposed to argon.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Green, Nathaniel, Cobian, Cristian, Perez, Adrianna, Moffatt, Andrew, and Abarca, Mario
- Description:
- This presentation talks about the research on autonomous collision avoidance system for a octocopter unmanned aerial vehicle (UAV) using LIDAR. Lack of obstacle avoidance capabilities have limited the use of UAVs for many applications such as package delivery, traffic monitoring, search & rescue, power line inspection, and environmental gas monitoring. An S1000 octocopter is equipped with a 16 channel LIDAR, Pixhawk flight controller, and an Intel NUC onboard computer, which is used to process the LIDAR data and implement the obstacle avoidance algorithm. Data collected by the LIDAR is transferred to a planar grid system for analysis and obstacle detection. Vector Field Histogram Plus (VFH+) method is used for obstacle avoidance. A successful implementation of the algorithm yields a horizontal, bidirectional (left or right) avoidance maneuver by the vehicle. Obstacle avoidance capability helps safely integrate UAVs in the National Airspace System for many applications. Abilities to avoid both static and dynamic obstacles are important for UAVs to possess a human equivalent level of safety and to satisfy federal and local safety regulations. Improvements to the VFH+ method include using a multiplanar grid system to increase its accuracy and effectiveness for the avoidance of static and dynamic obstacles. The presentation will show and discuss simulation and flight test results.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Ravel, Michelle
- Description:
- For economic reasons and particularly in impoverished regions, wound care in animals is often limited and does not meet ideal medical recommendations. For that reason, there is an interest in discovering accessible alternatives to treat with. Manuka honey is just one raw honey product graded at a medical level that has already been shown to have antimicrobial and anti-inflammatory properties, and one that is attributed to reducing edema and pH in wounds while promoting autolytic debridement of eschar - all properties that promote healing. In this experiment, the efficacy of various raw honey products on the healing rate of 4mm punch biopsies of mice is tested. Mice in this experiment would be given a punch biopsy on their backs and then be treated once every other day by cleansing the wound and applying one of several raw honey products into the wound. A control mouse would also receive the standard 4mm punch biopsy, but would be provided the anti-inflammatory drug, Meloxicam. These wounds would be measured with a ruler at the beginning of each subsequent application to provide comparisons on which wound, and its respective honey product, yield the fastest result (namely, a completely healed wound). This information would be used to show which raw honey products could be used or should be avoided in caring for open wounds for animals whose caretakers may not have the ability to purchase or access recommended medical treatments.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- 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, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Ruiz, Jaqueline and Toscano, Cindy
- Description:
- In the past three decades there has been an increase in the number of joint replacement surgeries among the US population. People in need of these surgeries include individuals of all ages for various physiological differences. This has led to a large demand for prosthetics and better prosthetic materials. A prosthetic is a device that substitutes for or supplements a missing or defective part of the body. It is essential that the prosthetic implant functions within the physiological stresses of the body's environment. However, due to the limitations of implant durability, many implants must be replaced at one point during the recipient's life. Prosthetic loosening is one of the major reasons associated with implant replacement surgery, and revision surgeries. The most common finding with failed prosthetic implants is aseptic loosening associated with periprosthetic osteolysis, the degradation of bone surrounding the implant. Aseptic loosening can be caused by the body's own immune response by a series of interactions with multiple cell types within the body. We will examine whether fibroblasts and osteoblasts have a circumstantial migratory response on the surface of different types of alloys that comprise human prosthetics. Migration assays for fibroblasts and osteoblasts have been performed with traditional metal alloys to test whether there is a difference in migration. Novel alloys are now being analyzed. The experimental metal alloys will include commercially pure titanium (CpTi), titanium-based alloys Ti-6V-Al (Ti64), and stainless steel (SS316L). We hereby aspire to find a metal that will increase the longevity of prosthetics.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Ancona, Janelle and Markson, Jordan
- Description:
- Poultry vaccine research is being conducted at a Cal Poly Pomona biosafety level 2 (BSL-2) facility. A central component of that research is the successful incubation and hatching of specific pathogen free (SPF) eggs. In an attempt to improve the percentage of SPF poultry eggs that hatched during incubation (hatchability), a simulated natural nesting cooling period was implemented once daily in two of four incubation groups. 159 SPF chicken eggs were acquired by a commercial supplier. Two incubation groups (n = 80) were maintained at a constant temperature of 37.5 °C. Two other incubation groups (n = 79) experienced a once daily 60 minute decrease in temperature (21.1°C), simulating the cooling an egg may experience when a hen leaves the nest. Eggs were incubated in a cabinet incubator within the BSL-2 facility, and all other incubation parameters were controlled (humidity, temperature, turning interval etc.). Candling to evaluate egg development occurred after the 1st and before the 3rd week of incubation. Heart rate was evaluated non-invasively before the 3rd week of incubation. The incubation groups without a cooling period had a hatchability rate of 82.5% and 90%, while the hatchability of the two groups with the cooling period were 94.9% and 100% respectively. In the absence of other unknown factors, this evidence suggests that including a daily 60 minute cooling period during incubation increases SPF poultry egg hatchability rates.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Gao, Ping-Yang and Farraj, Mustapha
- Description:
- Object detection is the process of locating and classifying objects, which can do such as video surveillance, robot navigation, etc. Deep learning based object detectors are trained from images with known classes of objects; these detectors can only detect a set of object classes that are known at training time. If we want to detect a new object class, we need to re-train our custom detector. However, this training process requires a large amount of images of the custom objects with annotated bounding boxes and performed manually by humans, which is costly and tedious. This causes substantial barriers to build custom detectors for arbitrary objects. To tackle this problem,our project targets a fully automatic framework of building an object detector for custom objects. In particular, we will leverage 3D model reconstruction to automate the generation of a large amount of annotated image data for target objects. Instead of annotating images and creating the bounding boxes, we only need to name the 3D object's masks once and render 3D objects to generate 2D images and its masks with different backgrounds and situations. Then, masks give the names of objects and their size and location to annotate images, which then help fine-tune deep learning models to yield an object detector with compelling identification accuracy of the custom objects. We evaluate this automatic framework, showing that it achieves satisfactory accuracy with limited user assistance while running in real-time on webcam and mobile devices.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Kanazawa, Garrison, Maldonado, Gerardo, Sun, Katie, Salinas, Alex, Mattis, Minna, Geyer, Stuart, Paulsen, Brandon, Mancilla, Mark, Rivera, Edgardo, and Hai, Jonathan
- Description:
- The United States Department of Energy launched the Sunshot Initiative with a goal of reducing the cost of solar energy to $.05/kWh to make it more competitive with other forms of energy. In pursuit of this goal, a project using reverse osmosis concentrate for grid-scale energy storage has been undertaken by researchers at the California State Polytechnic University, Pomona. To assess the feasibility of such a project, a techno-economic analysis is required in order to ensure the project can meet Department of Energy goals. Using information from water districts using reverse osmosis in conjunction with thermodynamic engineering principles, the techno-economic analysis can be used as a primary indicator of the project's economic potential. This presentation explains the technical and financial considerations made in order to assess the viability of using reverse osmosis concentrate for grid-scale energy storage in order to meet the goals of the Sunshot Initiative.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Flamenco, Raul
- Description:
- Per- and poly-fluoroalkyl substances (PFAS) are anthropogenic chemicals used for waterproofing and as surfactants. They are an important group of chemicals for many industries due to their thermal and chemical stability, contributing to their persistence in the environment. As Persistent Organic Pollutants (POPs), PFAS bioaccumulate and are biomagnifed through food webs, and pose a threat to wildlife and ecosystems. Birds are often used as bioindicators for monitoring environmental conditions (e.g., the effects of DDT on raptor species). Many studies have focused their attention on eggs as indicators of contaminants ranging from heavy metals to PCBs. Limited knowledge exists regarding the relationship between environmental, maternal, and egg PFAS transfer rates. This meta-analysis will examine a few key dynamics regarding PFAS concentration in birds: (a) the transfer of PFAS from the environment to the egg in order to assess how PFAS in eggs are indicative of environmental conditions; (b) the relationship between PFAS in eggs and maternal plasma; (c) inter- and intra-specific variation; (d) geographic and temporal variation. By learning more about the distribution and transfer rates of these contaminants it will be easier to set up more consistent and focused studies that address the fate and consequences of PFAS in wild populations of birds. This study will also identify which groups of birds are most at risk as well as which areas of the world have the highest levels of PFAS.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Khuu, Stephen
- Description:
- The liver generates primary bile acids for use in the intestinal tract. Once released in the tract, intestinal bacterium convert these primary bile acids to secondary bile acids, which have been correlated to a number of intestinal diseases such as cancers in the GI tract. This conversion occurs via a metabolic pathway encoded by the bile acid induced (bai) operon. One gene, baiK, encodes a putative CoA transferase; however, this gene product has not been characterized. To investigate the role of BaiK, further in vitro characterization is needed, requiring a significant amount of purified protein. To determine expression conditions that maximize the production of soluble BaiK, different E. coli cell lines, temperatures, and induction times were investigated using SDS-PAGE analysis of whole-cell and soluble protein samples. The next step, BaiK purification, used immobilized metal affinity chromatography and size exclusion chromatography to obtain the purified BaiK protein. Using the purified protein, initial crystallization trials were conducted to identify conditions that could lead to crystal formation. Future plans include optimization of any crystallization leads and structure determination, which will allow for function and mechanism of BaiK to be better understood.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Xu, Tyler, Rosas, Noe, Flores, Isidro, and Nguyen, Antonino
- Description:
- There are many benefits of having a materials with low density and high surface area. The related research has attracted significant attention. To make porous nanofibers is one of the way to achieve low density and high surface area, and it is possible to keep its ability to conduct electricity. The current research focuses on controlling the amount of carbon network which was extended throughout the material by heat treatment. The heat treatment decompose the space holders. The remaining carbon nanofiber network that contained high content of carbon which allowed the nanofiber to have good electrical conductive property. The purpose of this study is to determine the electrical conductivity of porous polyacrylonitrile-derived carbon nanofibers when heat treated at various temperatures. To test the conductive property of the nanofibers, a electrochemical analyzer was used. The data from the different sintered specimens were compared and analyzed through graphical analysis. The results of the specimens sintered at temperatures from 21⁰C to 600⁰C displayed little difference in electrical conductivity, but the specimen treated at 650⁰C was a clear outlier with the highest electrical conductivity. The specimen sintered at 550⁰C also showed good conductivity. It was found that the increase in the heat treatment temperature enabled the nanofibers' electrical conductivity in an increasing way. The material was also electrically sensitive to light, and the addition of iron oxide had no significant influence on the electrical conductivity of the nanofibers. It is concluded that the more carbonization of the fiber network, the better the electrically conductive of the fibers. Further study on porous polyacrylonitrile nanofibers and their electrical conductivity property is encouraged by comparing different space holder polymers.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Wachuka, Sharon
- Description:
- Race/ethnicity was a central theme in the 2016 election. Many believe that Donald Trump's success resulted from backlash against Obama having been the first African American president. Some European Americans expressed feeling marginalized and ignored during the Obama administration. Therefore, the current study explores how race and ethnicity impacted attitudes toward Donald Trump. Through qualitative research, we found different ways that these events may have culturally, socially, and psychologically impacted college students. Focus groups were separated into ethnic groups. Previous research assessed the impact of Donald Trump's presidency, but do not focus on how these demographic characteristics influence voting behavior and support for various candidates or policies. The results will allow us to gain knowledge regarding how these attitudes interact with participants' demographic characteristics such as gender, age, race/ethnicity, and socioeconomic status. We found that African Americans spoke freely compared to other groups about their dislike for Donald Trump. Although there was widespread negative feelings towards Donald Trump, there was a lack of knowledge about his policies. Topics on abortions and gun control were mentioned across all groups, while topics on fear and anger, were only present in African American, and Latino groups. Non muslim Asian Americans mentioned having little effect due to the access to their home countries. European Americans mentioned the church, and Hillary Clinton more frequently than most groups. Many European Americans voted due to the influence of their parents. Disagreement within generational beliefs was brought up among European Americans, and all mentioned racist parents.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Cady, Tristan, Esa, Sania, Majumdar, Prokkawn, and Borja, Felipe
- Description:
- This presentation talks about a system for autonomous navigation and target recognition for indoor search and rescue missions using small unmanned aerial vehicles (UAVs). The use of lightweight multicopters makes them ideal for maneuvering through tight spaces and locating victims in shorter time. Simultaneous Localization and Mapping (SLAM) techniques and Collision Avoidance Systems (CAS) are used to navigate the vehicle in the GPS-denied environments. SLAM, CAS, and target recognition software can help rescuers locate victims for disaster relief. Using a LIDAR and camera, it is possible to create a map of an indoor environment and determining and keeping track of the UAV's in the constructed map. The victims can be identified using onboard image processing. An RPLidar is used in conjunction with HectorSLAM algorithm localization and mapping. A Mobius Actioncam is used for the victim identification. The identification software runs on an NVidia Jetson TX1 microcomputer. The Jetson TX1 communicates with the onboard Pixhawk flight controller, while also transmitting data to a ground station using Xbee radio modules. Neural networks are used for the identification of victims as well as for collision avoidance with the wall so that the UAVs navigate the indoor environment safely. Simulation and test results will be presented. Work is underway to test the overall system in flight for realistic search and rescue missions in the indoor environment.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Mkrtchyan, Karapet and Sanders, Uriah
- Description:
- Floriculture is a multibillion-dollar branch of agriculture that is integral to the economy in numerous countries. The cut flower industry experiences heavy losses in products due to organ shedding. Organ shedding is initiated due to a highly regulated process, which originates with the formation of a detachment or abscission zone. Abscission zone cells in floral organs secrete enzymes to digest the cell walls of adjacent cells. These molecules degrade the middle lamella, which joins adjacent cells. This ultimately leads to the loss of the organ. Delphinium sheds its floral organs just four days after being harvested, making it difficult to ship it to long distances and to sell it outside of localized markets. This project seeks to investigate abscission zone development in floral organs of delphinium flowers using a combination of histological, microscopy, and genomic techniques. Developmental studies will provide a better understanding of the critical points in abscission zone formation in Delphinium flowers, transcriptome analysis at various developmental points will be used to understand the genetic basis of abscission. Results from this data can serve as a foundation for producing Delphinium with delayed abscission activity and thus a longer shelf life after harvesting, without the use of ectopically applied chemicals which still have questionable environmental impacts.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Duong, Vian and Lopez, Laura
- Description:
- The preliminary study of water disinfection began in the mid and late 1800s due to the numerous health hazards due to chemical and microbial water contamination. Although there are many existing methods of water treatment, disinfection by-products (DBPs) have remained as one of many challenges and limitations to safe drinking water. DBPs have been one of the major concerns at the Laguna Vista Elementary School in Oxnard, California. Water samples from the school's water supply revealed an increase in total trihalomethanes (TTHMs), a DBP, which exceeded the regulated maximum contaminant level in 2015, posing health risks to the public. DBP formation results in the chemical reaction between chemical disinfectant agents with the natural organic matter in water. Due to ideal conditions in the formation of THMs, variations of water treatment procedures, such as chemical coagulation, ion exchange, and nanofiltration, in the removal of natural organic matter and bromide will result in decreased DBP formation. Other methodologies to reduce DBPs formation include ozone, adjusting water pH levels, chloramines, and ultraviolet irradiation. Results from these procedures are expected to be lower DBP concentration; however, considering methodology limitations, its effectiveness will vary on the apparatus of the water system, contaminants within the water, and disinfectant. Further research regarding DBP and will classify the proper techniques and technology to reduce TTHM formations.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Rickerl, Kaitlin and Reed, Jessica
- Description:
- Trazodone HCl (TZN) is a selective serotonin antagonist and reuptake inhibitor that is commonly used to treat human depression and anxiety. In a study performed in 2016, TZN was found to be effective in providing sedation and improving handling in laboratory rabbits (Oryctolagus cuniculus). Despite its efficacy the safety of repeated treatment of TZN in rabbits had not been established. To identify the systemic effects of repeated TZN administration in rabbits, New Zealand white laboratory rabbits (n = 12) were orally given 40 mg/kg TZN every 12 hours (±1 hour) for 28 days. A physical examination was performed by a veterinarian every 7 days. Blood was collected for cell counts and serum chemistry analysis prior to and every 14 days during the TZN treatment. Despite some fluctuations in serum liver and kidney values, preliminary results suggest all physical exam parameters and blood values remained within expected reference ranges for the entire 28-day TZN treatment.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Naffaa, Omar, Naffaa, Ibrahim, and Bamgbose, Olusegun
- Description:
- The Decentralized Wastewater Treatment System (DWTS) consists of a variety of water treatment techniques for homes, businesses and industrial facilities independent of power grids or water transport systems. The system can treat both greywater and brackish groundwater- available even in some regions experiencing drought- and therefore can be deployed for single household use, as well as serve disadvantaged communities and remote regions lacking clean water infrastructure. DWTS can do this by being self-sustaining, and mobile, making use of renewable energy sources, solar power in this case, and by being robust, efficient, fault tolerant, and easy to operate. To accomplish this, we propose an embedded control system for DWTS that makes use of embedded sensors and an embedded microcontroller for automation, with the design of the system split into three stages: Data Acquisition, Fault Tolerance, Efficiency Analytics.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
29. Design of a FAME-MLL High Temperature, High Pressure Compressor for a Two-Stage Refrigeration Cycle
- Creator:
- Rugh, Thomas and Steele, Trevor
- Description:
- The design and analysis for the high-temperature, high pressure compressor is part of a two-stage refrigeration cycle using Methyl Lineolate (MLL) working fluid. This refrigeration cycle is part of a Venus Lander outlined in Anderson et al. (2016) [1]. At a critical temperature of 799 K MLL fluid was selected since it was higher than the Venus environment of 738 K, so therefore latent heat transfer was used in the heat rejection. Due to the high working temperatures and pressures, the mechanical design and proper selection of materials is paramount. As shown in the Cordier diagram, [2] the high specific diameter and low specific speed of this compressor leaves only a few options including a piston type compressor and a screw compressor. To prevent significant thermal expansion or mechanical failure, Nickel-based superalloys are chosen as well as mechanical seals (gold, silver) to mitigate leakage. The 3D design will include SOLIDWORKS rendered mechanical design concepts. For the 100 W compressor, appropriate options will be considered in the presentation as well as fundamental thermodynamic and fluid analyses. [1] "Analysis of a Multi-Cascade Methyl Linoleate/SCO2/Transcritical CO2/R410-A Refrigeration Cycle for use in High Temperature, High Pressure Environments," by Kevin R. Anderson, Chris McNamara, and Ariel Gatti, proceedings of the ASME 2016 IMECE Intl. Mech. Engr. Congress & Expo., Nov. 11-17, Phoenix, AZ USA. [2] Fluid Mechanics and Thermodynamics of Turbomachinery," by S.L. Dixon, and C. Hall, Butterworth-Heinemann, 7th Ed., 2013.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Marquez, Carlos
- Description:
- A SIEM (Security Information and Event Management) is a tool used to aggregate, normalize, correlate, and present event log data and network flow traffic from endpoint machines, servers running critical business services, antivirus appliances, network infrastructure components, and more. Software-Defined Networking (SDN) allows the separation of the control plane and the data plane in network devices, giving control of network flow routing to a centralized controller. While a SIEM provides a high level of visibility, it can take more time than is optimal for the user to take appropriate action based on their findings. This project uses enterprise-class switches, IBM QRadar SIEM, and OpenDaylight Nitrogen to see how integration between SDN and SIEM could be used to improve network metrics being measured by the SIEM and allow for user-configured automated network-level responses to detected anomalies in the event logs or network flows. The implementation of such responses could, for example, reduce the need to spend crucial time relaying quarantine orders between appropriate teams for hosts that are known to be infected with malware. This could result in cutting off the spread of the malware upon detection. If automation is not an option, then this same integration could be used to allow one-click options for the same actions in the SIEM interface. The end result is the same - reduced response time to potentially critical threats.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Sanchez, Jocelyn
- Description:
- Ingestible temperature capsules provide alimentary canal luminal temperature throughout their passage. This has the potential, depending on location, to more closely approximate core body temperature. The passage rate of these capsules may also reflect gastrointestinal (GI) motility or transit time. Major adaptive modifications have evolved in the alimentary canal design of non-human species. There has been limited use of these capsules in animals. The purpose of this study is to validate the use of VitalSense® Core Temperature Capsules (Equivital, Inc) in domesticated species. Animals were fitted with external wireless receivers that communicate wirelessly with the capsules every 15 sec. The capsules were then administered orally and monitored using a data acquisition system (LabChart®; ADInstruments, Inc.) until the temperature reading indicated a return to near ambient temperature (complete passage). Results were interpreted with published reference ranges on body temperature and GI transit time for each species. Temperature data as well as transit time was recorded and compared within and between animal species. Understanding the utility and limitations of this technology will help clarify applications for these temperature capsules in research and veterinary medicine.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Robles, Kevin, Alagarsamy, Jeyashree, and Toscano, Cindy
- Description:
- Higher biocompatibility and corrosion resistant biomaterials are more frequently being test-implanted for a wide range of purposes. However, surgery-related infection and implant microbe-colonization is generally the most common complication. When bacteria adhere to and proliferate on the biomaterial surface, the bacteria produce extracellular polymeric substances, primarily polysaccharides, which mediate cell-to-cell adhesion and form a biofilm. Our long-term goal is to extend the life of a prosthetic implant by identifying new metal alloys that are less susceptible to bacterial colonization. Using one of the major biofilm producing bacteria commonly found to colonize surgical implants, Staphylococcus epidermidis, we investigated the biocompatibility of novel metal alloys with regard to their susceptibility to biofilm propagation. The Experimental biometal alloys examined were stainless steel (SS), commercially pure titanium (CPTi), titanium alloy (Ti64), dental grade titanium (Ty) and titanium-boron metal alloys. Biofilm formation was analyzed using crystal violet staining and fluorescent microscopy. Ideal experimental conditions were obtained using flasks or a biofilm reactor. Biofilm reactor experiments were performed with (continuous culture) or without a constant infusion of growth media (batch culture) during biofilm formation. Results indicate that the Ty alloy permits less biofilm formation than traditional metals. Titanium-boron metal alloys, Ti64+0.04% B and Ti64+0.1% B, showed the least amount of biofilm compared to other metal alloys. Thus, we show that, compared to traditional metals such as stainless steel and pure titanium, the Ty, Ti64+0.04% B and Ti64+0.1% B alloys may be better alternatives as a modern prosthetic biometals.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Sycip, Oliver, Chaichi, Mohammad, Davis, Jaylen, Sun, Grace, and Pawluk, Jenelle
- Description:
- The objective of this study was to determine the performance of goat kids fed sorghum sudangrass/pearl millet mixed with legumes. Twenty goat kids (bodyweight 25.5 +/- 5.1 kg) were randomly assigned to four treatments (5 kids per treatment). The treatments were: (i) sorghum sudangrass + low mix (SLM; Control), (ii) pearl millet + low mix (MLM), (iii) pearl millet + high mix (MHM), and (iv) pearl millet + low mix + cow pea (MLC). All treatments also received alfalfa hay. The kids were housed in four pens (3.6 m x 6.1 m each); two kids within each pen were considered one experimental unit. Forage was cut manually and chopped into smaller pieces before feeding. Water and mineralized salt blocks were provided free choice. Goat kids on SLM treatment had the greatest (P < 0.05) average daily gain (ADG; 147 g/d) followed by MLC (126 g/d) and MLM (117 g/d) kids. The MHM kids had the lowest ADG (65 g/d). Similarly, SLM kids had the highest (P < 0.05) feed efficiency (7.4:1) followed by MLC (9.1:1) and MLM (9.8:1). Sorghum sudangrass was shown to be more nutritious for the goat kids than pearl millet. Future research should investigate the most optimal plant growth stage and legume combinations that can provide quality feed for kids in this growth phase.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Costescu, Diana
- Description:
- Titanium and titanium alloys are widely used as implants in the human body. This is because of their advantageous mechanical properties, corrosion resistance and biocompatibility. The alloy that is most commonly used is Ti-6Al-4V which is a titanium-based material containing 6 mass % of aluminum and 4 mass % of vanadium with the rest (90 mass %) comprised of titanium. Although this alloy has been in use for a while, it is important to understand their stability in the body because of the increasingly longer life expectancies of the population as a whole. A problem of importance is the discharge of metal particles into the tissue encompassing the implant, which can cause adverse reactions in the body. It is well known that the pH in the vicinity of an implant can vary quite dramatically during and immediately after surgery. These shifts in pH can cause a local increase in the rate of corrosion. The goal of this study was to investigate the impact of three different pH levels on the corrosion behavior of Ti-6Al-4V in a phosphate buffered saline solution utilizing electrochemical methods. The results will be reported and discussed.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Tasci, Amy, Tran, Michael, Hummel, Erica, and Cahuas, Liliana
- Description:
- Butanol is a gasoline substitute and naturally derived, making the production of butanol of increasing importance. Butanol is produced through acetone, butanol, ethanol (ABE) fermentation pathway in some bacteria, including the Clostridium species. Because of the increasing interest in butanol production, understanding the metabolic flux through the ABE pathway is important for optimizing the recovery of the biofuel. Global profiling of the ABE pathway intermediates is difficult due to the volatile nature of the metabolites and their structural similarity. Our goal is to develop a procedure for the quantification of butanol and butyric acid using Nuclear Magnetic Resonance Spectroscopy (NMR). Due to the complexity of the spectra, traditional 1H-NMR is insufficient for quantification, so we developed 2D approaches for quantification that involve J-resolved spectroscopy (JRES) and Total Correlation Spectroscopy (TOCSY) through the application of a calibration curve. We created a calibration curve with standards and then tested the correlation of the expected concentration of an analyte with the known concentration, and found that they were in high agreement (R2 = 0.97). Additionally, the 1H and TOCSY data for butyric acid had a %RSD of 0.45 and 23, respectively. For butanol, the 1H and TOCSY data had a %RSD of 0.36 and 64%, respectively. The 2D-JRES approach is currently being carried out. Although the 1H approach was the most accurate, we are working on improving the 2D approaches so that butanol and butyric acid can be quantified in a complex sample.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Castro, Thomas and Tamayo, Christian
- Description:
- Biodegradable polymers degrade once exposed to suitable environmental conditions. Using Biodegradable polymers as packing material would decrease the amount of plastic waste causing land pollution, for example: Plastic waste led to the formation of the Great Pacific Garbage Patch (GPGP) (Estimated to be 1.6 million kilometers Squared in size). Packing materials need to have certain properties in order to be viable. Some of the important properties include tensile strength, degradation rate, and glass transition temperature etc. The purpose of this research is to design a biodegradable polymer that will have optimal properties for packaging applications. Here, it was achieved by computer-aided molecular design (CAMD). This method involves linking the relevant properties to the structure of the repeat units of known biodegradable polymers to create quantitative structure property relationships (QSPRs). Molecular descriptors, connectivity indices were used to achieve the QSPRs. The problem was then formulated as an optimization problem involving the QSPRs, constraints and objective function. It was solved using Tabu Search algorithm with the goal of minimizing the objective function. The latter was the difference between the target property values and property of the newly built repeat unit of the biodegradable polymer.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
37. Self-Assembled Microsphere Based Lithography of Tmeplate to Fabricate Gecko-Like Synthetic Adhesive
- Creator:
- Wills, Frank, Galotra, Rohan, Hirokawa, Brent, and Lim, Jade
- 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, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Liu, Yi
- Description:
- There are many different motivations for people to travel. Researchers have found that 75% of leisure travelers have been motivated to visit a destination because of local food or beverage. As tea drinking habits and tea cultures are transmitted worldwide, tea tourism is emerging as a new type of tourism. However, unlike matcha in Japan and black tea in Sri Lanka, China as the birthplace of tea has not drawn more travelers' attention. Furthermore, the study about Chinese tea tourism is limited, and little is known about the tourists' intention to visit China for tea tourism. The purpose of this study is to determine the factors that could impact on tourists' intentions to participate in Chinese tea tourism. Findings can be used to predict and promote future Chinese tea tourism.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Ngo, Irene
- Description:
- Environmental and husbandry changes can create stress in horses, these can manifest themselves in illness, poor development and altered gestation. The Cal Poly Pomona campus has undergone a period of change over the past 5 years and 2016-2017 has had an increased amount of precipitation relative to the recent past. The Arabian horse herd and breeding program at Cal Poly Pomona has been maintained since 1925 in agreement with the stipulations of W.K. Kellogg. This study compared the birth size and gestation (length of time between actual and expected birth date) of Cal Poly Arabian foals born in 2012 (n = 9) to those in 2017 (n =14). Actual birth dates were within the same range as those expected in both the 2012 and 2017 foal groups (5.44 days +/- 12.78 days and 5.86 days +/- 10.48 days respectively). Foals born in 2012 were on average 99.48 cm +/- 5.61 cm tall and weighed 57.95 kg +/- 16.00 kg. Foals in 2017 were not significantly different, with an average height of 108.58 cm +/- 8.49 cm and weight of 49.51 kg +/- 16.18 kg. This data suggests that although the Cal Poly Pomona Arabian horses may have experienced some significant changes over the past 5 years, their pregnancy and birth size was not significantly affected.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Abeyta, Camille
- Description:
- Metabolomics is the study of the biochemical processes in an organism and how those processes are affected by biotic or abiotic stress. Understanding these mechanisms enables a broader view of how stress affects various biological systems and how the organism is susceptible or resistant to the stress. Currently, our research group is applying metabolomics and metabolite profiling to explore how plants respond to toxic soils, such as poisoning from aluminum which causes stunted plant growth. Surprisingly, a significant portion of arable land is contaminated with aluminum, limiting its use for food crop cultivation. Herein we are applying GC-MS to explore the metabolic perturbations associated with aluminum toxicity and the possible coping strategies plants have developed. Recently, we have developed a sensitive selected ion monitoring (SIM) method to explore the metabolic effects of stress on plant mechanisms. Not only is sensitivity increased, but also selectivity by detecting only the masses of interest. So far, we have doubled our sensitivity for many analytes, including those associated with the TCA cycle. Additionally, we are able to quantify 15 metabolites using our method and can add over a dozen more. With this method, we are exploring the metabolism of plants exposed to aluminum as well as the root exudate to understand plant coping mechanisms.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Cauthen, Joseph
- Description:
- Electroencephalography (EEG) has been researched as a potential biometric for almost two decades. The most promising techniques to obtain reliable authentication credentials have been the use of evoked potentials, or the process of measuring the change in neurological activity induced by introducing the subject to a stimulus. Research in which the stimuli are visual have yielded accuracy rates approaching those of other popular biometrics. However, if EEG authentication was to become a viable biometric, visual stimuli has practical drawbacks. Using evoked potentials, this study investigates the efficacy of auditory stimuli, more specifically music, instead. Using statistical analysis on the time-frequency readings of 5 participants this study seeks features of musically evoked potentials that have the necessary properties for authentication.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Gibbs, Richard, Cline, Isaiah, Reutershan, Hannah, and Raines, Spencer
- Description:
- In April, 2019, an array of telescopes spread across the globe, known collectively as the Event Horizon Telescope (EHT) produced the first ever image of the black hole at the center of our galaxy. Our goal is to recreate this image using an array of space based telescopes. Such distributed spacecraft systems provide advantages over other space based telescopes in terms of cost and resolving power. However the individual telescopes in the array must be able to coordinate their relative positions and pointing directions. One possibility to achieve this would be through blockchain technology. With the blockchain technology, we could robustly control multiple spacecraft and manage multiple formats of data seamlessly. We could also autonomously control distributed spacecraft systems. The data retrieval speed and robustness to failure will be greatly enhanced.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Oliver, "Pi" Raymond
- Description:
- Photosensitizers are used in Photodynamic therapy (PDT) to treat various medical ailments including cancer, acne vulgaris, skin and organ diseases, bacterial infections, and sexually transmitted diseases. When photons of necessary and specific wavelengths interact with photosensitizers, reactive oxygen species (ROS) are generated which damage the cellular structure of the infected tissue - inducing cellular necrosis and lysis or apoptosis. Ideal photosensitizers have a high quantum yield of singlet and triplet oxygen which damages the infected cells. Computer-aided molecular design (CAMD) was employed in order to search for new photosensitizers with such desirable traits. Quantitative structure-property relationships (QSPR's) were defined based on 21 different known photosensitizer structures for properties, singlet oxygen quantum yield and molar extinction coefficient. Connectivity indices were used as molecular descriptors to develop QSPRs. Correlations were obtained by linear regression. Chemical moieties were then analyzed, processed, and recombined using combinatorial optimization techniques in order to develop new photosensitizers. The optimization formulation minimizes the difference between the properties of the newly built photosensitizer and the target value and it is solved stochastically using the Tabu Search algorithm. Novel candidate photosensitizers have been proposed here for future research and use in PDT.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Delgadillo, Alba and Raza, Tehreem
- Description:
- There are an estimated 100,000 cases of torn Anterior Cruciate Ligaments (ACL) in the United States each year. Although autografts and allografts are approved treatments, they are expensive, labor intensive, cause donor site morbidity, and require a lengthy patient recovery process. Synthetic implants eliminate the harvesting procedure and have great biocompatibility, however their long-term effects are not understood. Understanding the full scope of mechanical properties of a synthetic material that closely matches those of native ligaments is imperative for ACL reconstruction innovation. PLG 10-90 (L-lactide-co-glycolide) is an absorbable copolymer which degrades into harmless products and is utilized as suture in orthopedic surgery. The copolymer sufficiently matches average native ACL tensile strength, percent elongation to fracture, and the degradation time is approximately that of ACL regrowth time. These factors make PLG 10-90 a strong candidate to provide structural support during the ACL recovery time and degrade thereafter. This research will determine a quantitative model of PLG 10-90 whose variables are expressed as decaying functions to account for the degradation of the copolymer. The model will probe the viscous and elastic components of PLG 10-90 and may be incorporated into ANSYS, an advanced simulation software. ANSYS may accurately simulate scenarios under conditions which are not feasible to conduct experimentally. An iterative process of customized simulations, rather than traditionally used empirical observations, will provide insight regarding in-vivo mechanical responses. This quantitative data of degrading PLG 10-90 will help determine the viability of the copolymer for ACL reconstruction.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Castro, Thomas and Tamayo, Christian
- Description:
- Photosensitizers are used to treat various medical conditions including acne vulgaris, herpes, and cancer through the process of Photodynamic therapy (PDT). Once administered, the infected area is illuminated with a specific wavelength of light. During illumination the photosensitizer produces reactive oxygen species (ROS) which cause damage to any nearby cells in multiple ways including apoptosis and necrosis. An ideal photosensitizer has a high singlet oxygen quantum yield and a low dark toxicity. In order to search for a new photosensitizer with these desirable traits computer-aided molecular design (CAMD) was used. Nine different known photosensitizers were used to create quantitative structure-property relationships (QSPR's) based on their dark toxicity. Linear regression was then used to create correlations for three properties which were molar extinction coefficient, singlet oxygen quantum yield, and dark toxicity. The chemicals were then broken down into moieties and reconstructed using optimization formulation and solved using the Tabu Search algorithm to give new photosensitizer molecules with desired properties.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
46. Facial Privacy
- Creator:
- Kim, Ricky and Karim, Waleed
- Description:
- Technology is evolving and especially in cameras, with how connected everything is the line in a person's privacy is running thin. This problem is significant affects celebrities with paparazzi but for the general population, there have been instances where our picture was taken without our consent. So we know the problem, what can we do about it? Fight fire with fire or in this instance technology with technology. Our project is a camera app using facial recognition to find the desired user and if desired so, can blur their face. The process of blurring the face will happen in a nanosecond when the phone processes the picture right before it saves the photo in the image gallery. The methodology of the program is to use a person's face as a variable, meaning the user's face will be stored in the app as a database for the program to recognize before displaying the message to the wearable device whether to blur the individual's face. We are still working on what method is faster by having the image of the user saved in a database or only relying on the wearable device. To achieve this, we need a smartwatch, the one we used is called Hexaware, and a smartphone, we were provided a Samsung S5. On the side, we also designed and modeled the user interface of the app for both the Samsung S5 and the smartwatch.The user interface so far is pretty simple. The setup process takes about 3 steps.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Soto, Benjamin
- Description:
- Garlic (Allium sativum) has a long recorded history as a medicinal agent. Modern efforts have begun to elucidate the effects of garlic on the immune system. Macrophages are essential innate immune cells that-when activated-produce protein signals called cytokines. Lipopolysaccharide (LPS) is an outer membrane component of gram-negative bacteria. Candida albicans (C. albicans) is an opportunistic yeast species that heavily infects immunocompromised individuals. We previously reported that garlic increases the secretion of a cytokine, TNF-α, from LPS activated J774A.1 (J7) macrophages. We have found similar results in LPS activated mouse-harvested macrophages but did not see an effect in LPS activated RAW 264.7 (RAW) macrophages. We further observed that garlic reduces TNF-α secretion from C. albicans activated J7, RAW, and mouse-harvested macrophages. The mechanism of action utilized by garlic to exert its effects on immunity remains elusive. Thus, we sought to understand if garlic alters TNF-α mRNA levels from LPS or C. albicans activated macrophages. To this end, we plated J7 and RAW macrophages at a concentration of 1.25x105 cells/mL and mouse-harvested macrophages at a concentration of 1.00x106 cells/mL. Macrophages were then challenged with LPS (0.1 ng/mL) or heat-killed C. albicans (6.25x106) cells/mL and treated with a 1:500 dilution of garlic. Following a 2 hour incubation, mRNA was extracted and analyzed via RT-qPCR. Preliminary data shows that garlic reduces TNF-α mRNA levels in LPS activated J7, RAW, and mouse-harvested macrophages. Results also suggest that garlic reduces TNF-α mRNA levels in C. albicans activated J7, RAW, and female mouse-harvested macrophages.
- Resource Type:
- Abstract, Poster, Presentation, and Student Research
- Campus Tesim:
- Pomona
- Creator:
- Sanchez, Joseline and Watkins, Anna
- Description:
- Millennials are often misrepresented in the media as self indulgent and apathetic towards politics. Contrary to this narrative, millennials are a major political force and are one of the most diverse generations. In order to challenge these statements, a survey of 937 respondents located in Southern California has been conducted. We recruited a wide range of students from different demographics and our sample uniquely features an often overlooked population of Latinx and Asian respondents. Our research finds that millennials feel strongly about several issues including Black Lives Matter, immigration issues, women's rights, gun reform, and healthcare. Our preliminary findings show that there is a misconception when it comes to millennial political engagement. Millennials appear apathetic because of their low participation in rallies; however, millennials engage politically on different platforms when compared to baby boomers and previous generations. We look at the rise and influence of social media and how it has affected this new generation's political activism.
- Resource Type:
- Self Assessment, Abstract, Poster, and Presentation
- Campus Tesim:
- Pomona
- Creator:
- Zhang, Zijie and Cortez, Justin Lanz
- Description:
- Achieving decarbonylation of ketones is of interest as a route towards synthesizing carbon-carbon bonds. However, decarbonylation requires the cleavage of two carbon-carbon bonds which are kinetically and thermodynamically more stable than the carbon-hydrogen bond of an aldehyde. A recent study first reported decarbonylation of ketones by nickel bound to phosphine or carbene ligands. This project aims to establish feasibility of using bidentate N-heterocyclic carbene (NHC) nickel complexes as catalysts for decarbonylation reactions. Three nickel complexes with varying ligand sterics were tested as catalysts in an initial reaction with benzophenone to establish feasibility. Following the reaction, the observation of biphenyl by GC-MS indicated that a decarbonylation had occurred. Future goals include tailoring the catalyst and reaction conditions to improve yields and expanding the scope to substituted ketones. Improving nickel mediated decarbonylation of ketones will be significant in the development of new reactions for synthesis of pharmaceuticals and fine chemicals.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona
- Creator:
- Zadeh, Pasha Beglar, Huang, Renrong, Rounsefell, Kristi, Keil, Gordon, and Dela Paz, Adriel
- Description:
- A hashing algorithm is a one-way encryption mathematical function that takes in a set of data and condenses it to an output of a fixed size called the message digest (hash). It has many applications in computing systems, from checking data integrity in digital communications to speeding up performances of databases. Our project involves creating a processor based on the MIPS Instruction Set that is specialized to perform the SHA-256 hashing algorithm. Custom hardware is incorporated in the processor for specific operations that are needed in calculating the hash. This simplifies the instruction calls for those specific operations, thereby condensing the required assembly code for implementing the SHA-256 hashing algorithm.
- Resource Type:
- Student Research, Poster, Presentation, and Abstract
- Campus Tesim:
- Pomona