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- Creator:
- Lee, Pita
- Description:
- Exclusion learning is a term that is coined by behavior analysts to describe the emergence of new conditional discriminations in the absence of direct training. Given the presentation of an unknown sample and two comparison stimuli (e.g., an unknown stimulus and a known stimulus), selection of an unknown stimulus may emerge. Even when an individual has never been trained to select an unknown stimulus in the presence of an unknown sample, exclusion of the known stimulus may occur simply because it does not correspond with the unknown sample. In this project, basic and applied literature conducted on exclusion learning were reviewed that included different groups of individuals. These individuals included non-human subjects, adults, children, and individuals with mild-to-severe developmental disabilities. Recommendations and implications for practice were also discussed. In addition, a brief training was developed that included instructional materials to train behavior analysts and behavioral technicians on the topic of exclusion learning.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Special Education and Counseling
- Creator:
- Subramani, Naveen Kumar
- Description:
- With the rise of Artificial Intelligence over the past decade, many useful applications have been developed and in use. Computer vision is one of the core areas of Machine Learning. Computer vision could solve a range of tasks in many areas like medical computer vision, manufacturing machine vision, in autonomous vehicles and so on. Pedestrian detection is a challenging problem in computer vision. It is also an important task in video monitoring system. The objective of this thesis is to build a true pedestrian detector. The robust model is based on deep residual neural network using Transfer Learning. Trained model can be used to detect pedestrians on traffic videos in real time.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Computer Science
- Creator:
- Amegatcher, Chris
- Description:
- The large Continent of Africa has had only two MROs: one in Addis Ababa, Ethiopia, and the second one in Johannesburg, South Africa. The rest of the continent fly their aircraft to Europe for Major Maintenance work when needed. This fits into a picture along with other factors, such as a protracted Colonialism, perpetrated by a few European Countries for several decades; who took away raw materials for processing and manufacturing in Europe. Lack of aviation infrastructure, economic and financial issues, safety and security, had hitherto, worked as barriers to the growth of aviation and other infrastructure in Africa. After the collapse of Ghana Airways Corporation, and the demise of Nigeria Airways Ltd., a strong argument exists for building a repair and overhaul facility for Aircraft operations within West Africa.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Technology
- Creator:
- Sheikh, Sana
- Description:
- ABSTRACT Interface Design for Memory Access in an FPGA-MIPS Datapath This thesis focuses on the design and implementation of memory access control on an Altera DE-1 System-on-chip (SOC) board. The board integrates a Hard Processor System (HPS) with a dual-core cortex-A9 processor, and an FPGA fabric within a Cyclone V SOC chip. A multi-cycle MIPS datapath is implemented on the FPGA fabric, the datapath needs to access the SDRAM for instruction fetch, data fetch and data store. A handshaking protocol between the datapath and the (synchronous dynamic random access memory) SDRAM control is used to facilitate the memory accesses. Data communication between the HPS and the FPGA is performed using the Altera Advanced Microcontroller Bus Architecture (AMBA) Advanced Extensible Interface (AXI) bridges. The bridges are configured so the MIPS datapath can access instructions and data from the SDRAM. The MIPS machine code and the program data are initially stored in a Secure Digital Multi Media Card (SD/MMC). The HPS, using a burst mode, initiates a mapping of all the code and data from the SD/MMC to the memory banks in the SDRAM. Once the mapping is completed, a run command is performed on the Multicycle Datapath to sequentially execute the instructions. The result, then, is displayed using the on-board LED’s. The interfaces among the HPS, the FPGA, and the SD/MMC are developed via a custom IP Core. The software packages used for the implementation of the system include; Altera Quartus-II which provides the programming environment for the design on the FPGA fabric and the Qsys tool for designing custom IP and the bridge configurations. The Quartus II also allows the user to establish a JTAG and UART connection for hardware debugging on the Altera DE-1 SOC board. The C code compilation, debugging and building are performed using the INTEL SOC FPGA Embedded Design Suite (EDS). The HPS runs a LINUX Operating System (OS) which builds a LINUX KERNEL. When connected to the board, the LINUX KERNEL maps and integrates all the programming components together and synchronizes data communication. The results have shown correct instruction fetching and data accesses for the execution of MIPS instructions on the datapath.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Electrical and Computer Engineering
- Creator:
- Aghajanian, Andreh Andy
- Description:
- The time of death of an individual can contain important information to a crime scene investigator. Current methods to determine the post-mortem interval of a deceased individual are not entirely accurate or reliable. In order to devise a more effective method, we examined the OxyVu Hyperspectral Oximetry system. This system measures the levels of oxyhemoglobin and deoxyhemoglobin across a particular area of the dermis skin layer. It is hypothesized that upon death in an individual, levels of oxyhemoglobin decrease while deoxyhemoglobin levels increase. The OxyVu system was employed on a laboratory rat model where various spectroscopic readings were taken on euthanized rats to see if a relationship exists between oxyhemoglobin and deoxyhemoglobin levels in the rat after death. The results failed to show any conclusive, accurate or consistent findings between hemoglobin levels after death. These findings suggest that there may be no relationship between oxyhemoglobin and deoxyhemoglobin levels after death.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Criminal Justice and Criminalistics
- Creator:
- Rojas, Brianna
- Description:
- The purpose of this study is to develop a finite element (FE) model of an existing DOT-approved, Omni-Directional Suspension (ODS) motocross helmet shell, as a means of optimizing helmet design to mitigate head injury risk. To assess the structural behavior of the composite shell (constructed of various fibers embedded in an epoxy resin), a physical, quasi-static 3-point bend test is conducted on various shell samples. In conjunction with the physical test, a simulated 3-point bend test is conducted in the multi-physics simulation software, LS-DYNA. The helmet shell is represented in LS-DYNA with *MAT_58, a continuum damage material used to model woven fabrics and composite materials. As a means of validating the FE model, comparative analysis is conducted between the simulation and experimental 3-point bend test results to confirm that *MAT_58 is capable of predicting the helmet shell’s structural behavior. Development of a valid motocross helmet shell FE model will contribute to future development of the full OSD helmet model. Once constructed, the full motocross helmet FE model can then be fitted over LS-DYNA’s existing Hybrid III 50th Percentile Male Anthropomorphic Test Device (ATD) FE model to simulate translational and rotational impact and in turn, assess head injury risk.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Mechanical Engineering
- Creator:
- Aleman Zometa, Jeniffer
- Description:
- Established disturbance theory aimed at understanding community structure maintains that externally imposed disturbances occur randomly over the landscape and interrupt competitive exclusion, thereby increasing community diversity. In contrast to this idea, our detailed landscape surveys show that disturbances happen most frequently in sub regions of the bed that support the greatest productivity and hence thickest cover of Mytilus californianus. Crowding reduces the attachment strength of mussels, making them more susceptible to dislodgment, and also lowers the reproductive condition of those imbedded individuals. A layer of empty shells and debris develops above the rock surface, barring direct rock attachment and promoting lateral attachments in the surface layers. This structurally unstable aggregation with thickened layers incurs more frequent propagating gaps than thinner layers. Mussel beds are comprised of different disturbance regimes, arrayed predictably over the intertidal landscape, and composed of competitive dominants that show self-limitation in thickened regions while maintaining subordinate species.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Biological Sciences
- Creator:
- Ibrahim, Mohamed Elsaid Awad
- Description:
- With the increase in technology, many developers have advanced their knowledge in improving road safety by designing various devices such as Vehicular AD Hoc Networks (VANETs). These VANETs are important in ensuring there is a continuous vehicle-to-vehicle communication along the roads while at close range in order to prevent road accidents. Similarly, VANETS are meant to ensure vehicles are alerted of events occurring at their surrounding through information sharing between vehicles to other vehicles (V2V) and vehicles to stationary objects built along the roads (V2I). However, MAC sub-layer protocol is common when designing VANET devices; this is because VANETs are ineffectual in preventing road accidents when messages cannot get to the other party. The path breaks causes delay of inconsistency and packet delays from source to destination. There are several improvement measures that can be taken to VANET is effective and efficient in improving road safety through inter vehicle communication and vehicle to stationary VANET devices installed along the roads. Since VANET operates in a wireless environment, there are other interferences from wireless devices such as mobile phones, laptops and other operational devices installed in vehicles. This thesis evaluated the performance of multiple routing protocols on MANET to assess their ability in finding stable paths. The evaluation led to practical suggestions on how to design better routing protocols for VANET. Keywords: MAC sub-layer, VANET, RTS, CTS, PASTA, TDMA and V2V/V2I
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Electrical and Computer Engineering
- Creator:
- Perng, Baochin
- Description:
- Coconut oil has been widely used for health due to anecdotal evidence and information posted from the internet. However, researchers still continue to search for the best diets to improve the quality of life, especially for people with cognitive decline. The aim of this project is to create a novel dietary approach, the Keto-Mediet, which may help prevent the onset of Alzheimer’s disease. The Keto-Mediet approach combines the benefits of Ketogenic diet and Mediterranean diet into a food pyramidal model with evidence from the literature of the years between 1982 and 2015 focusing on gene-by-diet interaction, and lipid and glucose metabolism in the brains of Alzheimer’s patients. The Keto-Mediet pyramid is rich in various types of vitamins and substitutes coconut products for saturated animal fats, and limits glucose intake is intended to delay brain degeneration. This approach also encourages adherence to this healthy diet and lifestyle changes including exercise for people whose age ranges from 40 to 75 years. Those who comply with this approach will significantly enhance their knowledge and adopt a healthier lifestyle, as compared to those whose modern eating patterns are typically less healthy. Therefore, the Keto-Mediet approach can be applied in hopes of preventing and decreasing Alzheimer’s disease in different ethnicities and cultural groups.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Kinesiology and Nutritional Sciences
10. Development of a database to characterize the density of nail polish samples by magnetic levitation
- Creator:
- Martinez, Elisa Nicole
- Description:
- This study describes a simple and non-destructive method to characterize the density of nail polish samples using magnetic levitation (MagLev). Dried nail polish samples were levitated in a 3M MnCl2 paramagnetic solution between two permanent NdFeB magnets. The levitation heights were measured using ImageJ software and the density was calculated by comparing the sample data to a standard density bead linear regression curve. A database of the density values of 76 different nail polish samples from seven different manufacturers was compiled. Questioned nail polish samples may be compared to samples in this database in order to identify a potential manufacturer. The results suggest that density values may be more discriminating that FTIR analysis in distinguishing similarly colored nail polish. Demonstrable differences were also observed in the density of nail polish samples collected from a microscope slide verses in situ sampling of the same nail polish from a fingernail.
- Resource Type:
- Thesis
- Campus Tesim:
- Los Angeles
- Department:
- Criminal Justice and Criminalistics