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Fault Discrimination Algorithm for Busbar Differential Protection Relaying Using Partial Operating Current Characteristics
Get PDFDifferential protection is the unit protection system which is applied to protect a particular unit of power systems. Unit is known as zone in protection terminology which is equivalent to simple electrical node. In recent time, low impedance current differential protection schemes based on percentage restrained characteristics are widely used in power systems to protect busbar systems. The main application issue of these schemes is mis-operation due to current transformer (CT) saturation during close-in external faults. Researchers have suggested various solution of this problem; however, individually they are not sufficient to puzzle out all mis-operational scenarios. This thesis presents a new bus differential algorithm by defining alternative partial operating current characteristics of a differential protection zone and investigating its performance for all practical bus faults. Mathematical model of partial operating current and operating principle of the proposed bus differential relay are described in details. A CT saturation detection algorithm which includes fast and late CT saturation detection techniques is incorporated in relay design to increase the sensitivity of partial operating current based internal-external fault discriminator for high impedance internal faults. Performance of the proposed relay is validated by an extensive test considering all possible fault scenarios
Biloxi Marsh Platform Response due to Meteorological Forcing
Get PDFThe Biloxi Marsh of the eastern Mississippi River delta plain is exposed to meteorological forces ranging from large-scale, mid-latitude cyclones to smaller scale storms and squalls. Each time that these marsh platforms are exposed to a storm event, the potential exists for either deposition or erosion to take place. This study examines the connection between wind speeds, stratigraphic composition, marsh edge morphology, and marsh edge erosion at 4 sites in the Biloxi Marsh. As much as 2.17 m of erosion were measured during the 9-month study with a maximum, averaged erosion rate of 0.03 m day-1. Shell berm transgression was also documented as the result of winds from a low-pressure system near the site that resulted large waves. Shell berm movement occurred as a result of high wind speeds on shore but there was no connection between wind speeds and erosion for the duration of this study across all sites
The Diary and Notes of Marcus Christian as a Site of Rhetorical Education, Entries 1924-1945
Get PDFThis thesis asserts that Marcus Bruce Christian (1900-1976), a New Orleans, Louisiana, black poet, writer, and historian, used his diary and notes as a site of rhetorical education and as a space in which he constructed and reinforced a Duboisian ethos, a particular type of black identity and character shaped by the political rhetoric of W. E. B. Du Bois. Maintaining this ethos, Christian, an autodidact throughout most of his life, negotiated a society strangled by white supremacist ideology and resisted being interpellated into the negative black identity constructed by a hostile and stifling Jim Crow South
Thrown
Get PDFIn this thesis paper, I will document and analyze the process of making my graduate thesis film, Thrown. I will start by stating my overall thesis statement, then move into the evaluation of my performance in regards to each specific area of the filmmaking process. I will reflect how I translated my learning at the University of New Orleans in a practical application short film exercise and detail my successes and struggles throughout the process. The goal of this investigation is to understand how I can improve in the future. In the end, I will determine if my thesis proves true, the level of my success in individual aspects of filmmaking, and the overall efficacy of Thrown as a short film
SPICE: A Software Tool for Studying End-user’s Insecure Cyber Behavior and Personality-traits
Get PDFInsecure cyber behavior of end users may expose their computers to cyber-attack. A first step to improve their cyber behavior is to identify their tendency toward insecure cyber behavior. Unfortunately, not much work has been done in this area. In particular, the relationship between end users cyber behavior and their personality traits is much less explored. This paper presents a comprehensive review of a newly developed, easily configurable, and flexible software SPICE for psychologist and cognitive scientists to study personality traits and insecure cyber behavior of end users. The software utilizes well-established cognitive methods (such as dot-probe) to identify number of personality traits, and further allows researchers to design and conduct experiments and detailed quantitative study on the cyber behavior of end users. The software collects fine-grained data on users for analysis
Visualization Representation of Data Collected From Acoustic and Satellite Tags
No full textTelemetry is a PostgreSQL-driven Ruby on Rails application that allows biologists to observe the movements of fish using visual rendering of satellite and acoustic data and discover movement patterns based on environmental dynamics. Data is parsed into the system and analyzed to produce paths for each participating animal. An additional mapping component yields a graphical visualization of these paths. Combined with environmental sampling of salinity, lunar cycles, and weather patterns, these tools aim to provide biologists a rich toolset to monitor and analyze fish patterns. Participating fish in Lake Pontchartrain are tagged with transmitters emitting signals to stationary hydrophones mounted on buoys in the lake. Data is collected periodically from the buoys by field agents and imported into the Telemetry system. The retrieved data consists of detection objects detailing the latitudes, longitudes, and timestamps for each fish. Moreover, some fish are tagged with satellite transmitters whose data is collected remotely. The Telemetry project not only allows biologists to monitor fish movements, but also gives access to the fishermen for better planning their fishing strategies. In addition, both biologists and fishermen will have a better understanding of how different factors affect the fish movement patterns. The project can be accessed by the public via the live site at https://louisianafisheries.net/telemetry. To view the fish movement patterns, simply click on the “fish tracks” tab and select the appropriate fish to view their paths
Odor Monitoring at the New Orleans East Bank Wastewater Treatment Plant
Get PDFHydrogen Sulfide is a corrosive, odorous, and hazardous gas that can cause issues for wastewater collection systems and treatment plants. When evaluating hydrogen sulfide concentrations it is important to consider the source, odor causing mechanism, and its level of toxicity. In this study, continuous hydrogen sulfide monitoring was performed for 8 locations within the New Orleans East Bank Wastewater Treatment Plant for a span of 5 months. Hot spots within the plant are located and data analysis is performed based on daily and hourly averages of hydrogen sulfide concentrations. The data was configured to show peak hydrogen sulfide concentrations at specific time intervals throughout the day
Associations between Executive Functioning and Social Adjustment in Urban School Children Participating in a Mindful Yoga Practice
Get PDFThe present study is a preliminary investigation assessing the associations between socioemotional adjustment and executive functioning problems in a low-income, high-risk sample of elementary students who participated in a mindful yoga practice. Mindfulness is a concept that encompasses attention within the present moment and requires acceptance and nonjudgment. Rather than being an outcome-reliant principle, it emphasizes the individual’s present state of mind and being (Kabat-Zinn, 2003). Recently, mindfulness has become a popular phenomenon in research. It has shown to be a highly effective coping strategy and mediator for cognitive, emotional, and behavioral problems (Flook, 2010; Hayes & Feldman, 2004; Broderick & Metz, 2009; Mendelson et al., 2010). However, little research has been done to assess the role mindfulness plays in children. The objective for this study was to investigate the associations between contextual stress, mindfulness, executive functioning difficulties, emotion dysregulation, and aggression. Data for these variables was reported via self-report (n=21), parent-report, and teacher-report at one time towards the end of the yoga curriculum. Mindfulness was not associated with executive functioning or emotional dysregulation. However, parent and teacher reports did reveal significant links among more aggression, executive functioning difficulties, and emotion dysregulation. Discussion notes the limitations of the current study and recommendations for improving the study design to improve the study of positive interventions for children experiencing high-stress lifestyles