Analysis of the Interaction between Distance Relay Protection System and Grid-Connected Inverter-Based Resources

This paper discusses protection challenges posed by the integration of inverter-based resources (IBR), such as large solar farms, into transmission systems due to varying, nonstandard control strategies and fault responses. In particular, this paper investigate the effects of IBR interconnection on distance protection using memory voltage polarization (relay 21). A time-domain electromagnetic transient program (EMTP) is used to perform simulations for analysis. The photovoltaic (PV) park available in the EMTP library is used as the IBR model and is converted into a white-box model in accordance with the latest industry standard, IEEE 2800-2022. The simulations are also experimentally validated to ensure that the simulation models accurately represent the behavior of the protection system under real-world conditions and to verify if the traditional relay settings are sufficient to protect the transmission line due to the low short-circuit current from the IBRs

Choreographing the Rhythms of Observation: Dynamics for Ranged Observer Bipartite-Unipartite SpatioTemporal (ROBUST) Networks

Existing network analysis methods struggle to optimize observer placements in dynamic environments with limited visibility. This dissertation introduces the novel ROBUST (Ranged Observer Bipartite-Unipartite SpatioTemporal) framework, offering a significant advancement in modeling, analyzing, and optimizing observer networks within complex spatiotemporal domains. ROBUST leverages a unique bipartite-unipartite approach, distinguishing between observer and observable entities while incorporating spatial constraints and temporal dynamics. This research extends spatiotemporal network theory by introducing novel graph-based measures, including myopic degree, spatial closeness centrality, and edge length proportion. These measures, coupled with advanced clustering techniques like Proximal Recurrence, provide insights into network structure, resilience, and the effectiveness of observer placements. The ROBUST framework demonstrates superior resource allocation and strategic responsiveness compared to conventional models. Case studies in oceanographic monitoring, urban safety networks, and multi-agent path planning showcases its practical applicability and adaptability. Results demonstrate significant improvements in coverage, response times, and overall network efficiency. This work paves the way for future research in incorporating imperfect knowledge, refining temporal pathing methodologies, and expanding the scope of applications. By bridging theoretical advancements with practical solutions, ROBUST stands as a significant contribution to the field, promising to inform and inspire ongoing and future endeavors in network optimization and multi-agent system planning

Caregiver Engagement in Their Child\u27s Mental Health Rehabilitation Services: Utilizing the Hoover-Dempsey and Sandler Model of Parental Involvement (2005) in Mental Health Counseling

Mental Health Rehabilitation (MHR) is a widely utilized community mental health service in Louisiana for low-income families. However, treatment adherence, including caregiver engagement for minor clients, is often low. There is still limited understanding of the barriers to caregiver engagement and few tools to assess these barriers and engagement behaviors. Clinicians, caregivers, and clients currently engaged in MHR services completed a modified version of the Parent Involvement Project Questionnaire (PIPQ) to determine if this scale and its associated theory, the Hoover-Dempsey and Sandler Model of Parental Involvement (2005), can be used in a mental health counseling format to assess for caregiver engagement in counseling. Reliability scores using Cronbach\u27s alpha were examined to determine whether the PIPQ maintains similar reliability values to the original survey. Independent T-tests were also conducted to examine differences in clinician ratings from the caregivers and clients. Hierarchical and simple regression analyses were run to determine how caregiver beliefs and perceptions impact their involvement behaviors and their child\u27s perceptions of these behaviors. Patterns emerged in the data that indicated that the modified PIPQ was a reliable measure of caregiver engagement and that clinicians often rated caregivers and clients higher on this measure than they rated themselves. Several caregiver beliefs and perceptions about their engagement also showed interactions with their forms of engagement behaviors and their child’s perception of these behaviors. Responses to calls for participants also indicated barriers to MHR and other community agencies participating in research studies that warrant future study

Banat al-Nahda: Mary Ajami and Nazik al-‘Abed’s Creation of Women’s Spaces in Greater Syria 1910-1920

This thesis examines the spaces created by the pioneers of the Syrian women’s movement in 1910-1920, Mary Ajami and Nazik al-‘Abed, using spatial analysis and analyzing the discursive space they created in their magazines. Throughout the brief independence during Prince Faysal’s rule in 1918-1920, Ajami and al-‘Abed mobilized to allow women to enter male-dominated spaces and discourses. They utilized their pioneering magazines, al-Arus and Nur al-Fayha,’ to reach women in public and private spaces. The Women’s Literary Forum was established to foster women’s self-representation and education. At the same time, the School for the Daughters of the Martyrs and Nur al-Fayha’ Society aimed to create an uncontested presence for women in national affairs. This paper aims to show that Ajami and al-‘Abed adopted a creative framework to help women gain their rights by linking the idea of women’s liberation with Syria’s independence

Development and Validation of LC-MS Methods for the Detection of TMAO and Multi-Class Drug Residues in Food Products

Mass spectrometry is an analytical technique to identify and characterize compounds based on their molecular mass. It works by ionizing chemical compounds to generate charged molecules or fragments and then separate them according to their mass-to-charge ratio. Measuring these masses provides information about the analyzed substances\u27 chemical structure, composition, and quantity. This technique can be used to formulate the composition of a sample and measure the concentration of a specific compound within the sample matrix. A set of analytical methods has been developed by utilizing the following technique. The process for extraction and detection of Trimethylamine oxide (TMAO) in tissues of marine organisms was created to determine its concentration in rainbow trout. TMAO is an essential molecule for farm-raised fish and, therefore, can be commonly found as a food additive to their diet. The goal was to ensure the accumulation of the supplement in the intestinal and muscular tissues of dissected fish. Another analytical method has been instituted for the multi-drug residues (MDR) analysis in food products, such as dry milk and beef and porcine tissues. The list of drugs includes nine antibiotic families found in food products. Residues can either be administered drug or a metabolite of a drug. Consumption of these residues can pose a threat due to allergic reactions, carcinogenicity, and antimicrobial resistance. Regulatory bodies, such as the EU, US FDA, and Codex, formulated a list of maximum residue limits (MRL) in animal-derived products. Thus, the method for simultaneous analysis of these drugs and their metabolites is crucial to uphold the guidelines set on the market. Both detection methods, TMAO and MDR, were put on the Liquid chromatography-tandem mass spectrometry (LC-MS/MS) systems. This analytical technique is commonly used for detecting residual amounts of contaminants due to its high sensitivity. Through the analysis, traces of TMAO and drug residues were found in fish tissues, dry milk, bovine and porcine tissues

The Last Duel? Kulturkämpfe in fin de siècle New Orleans

An 1897 murder in New Orleans’ French Quarter appeared to be a commonplace barroom-brawl-gone-bad. However, a historical analysis of the crime reveals the complex intersection of race, ethnic identity, and a new meaning of manhood at the turn of the century. When we place the words exchanged between the two men inside urban spaces and the Atlantic world of the late nineteenth century, how racial and gender formation unfolded on the street becomes clear. This microhistory applies spatial analysis and a deep read of newspapers, magazines, and court documents. It addresses a topic not yet fully explored, namely, the intersection of Creole and French identity with a new ideal of manhood. It is the story of a Kulturkampf—a culture war-- and of the long-standing tradition in the United States to resort to extra-legal violence to settle disputes

Investigation on the Effects of Biofouling on the Boundary Layer

This study is an investigation of the effect of biofouling on the boundary layer of a flat plate and a NACA 4-digit series foil. Three identical hydrofoils made of resin were placed in the Gulf of Mexico at Grand Isle, Louisiana, and observed and analyzed by marine biologists at the University of New Orleans for their species composition. The resulting biofouling that grew was primarily made up of barnacles and bryozoans. The foils were submerged in an open channel flume at zero incidence and subjected to a series of experiments whose arc-length Reynolds numbers ranged from approximately 13000 to 32000. The flow regime around the fouled foils was laminar and captured in a series of experiments using two-dimensional particle image velocimetry. The resulting data was compared to the flow regime around an identical foil with no biofouling on its surface, which was tested using the same methods at zero incidence. The flow regime of the “clean foil” was also captured using two-dimensional particle image velocimetry. The effects of the biofouling on shear stress, boundary layer thickness, and velocity profiles were analyzed. The strengths and weaknesses of using the particle image velocimetry method for capturing flow around biofouling was also discussed. Two dimensional simulations of the fouled foils were created in the commercial computational fluid dynamics software ANSYS Fluent for comparison to the results of the particle image velocimetry experiments on the fouled foils. The experiments on the fouled foils found that the biofouling causes the boundary layer thickness to increase along the length of the foil in comparison to the boundary layer of the clean foil. However, at these Reynolds numbers, even relatively large and obstructive biofouling such as barnacles do not cause significant disruption of the boundary layer or the flow regime. The two-dimensional simulations of the fouled foils compare favorably to the corresponding experimental results, although they slightly overpredict the effect the biofouling has on the separation regions of the fouled foil, which are located downstream of the location of maximum thickness. For example, the separation regions, and therefore the boundary layers, were somewhat thicker in the simulations than in the experiments. It was found that upstream of the location of maximum thickness of the foil, the simulations and experiments showed better agreement in terms of thickness of the boundary layer and the nature of the velocity profiles. It was determined that particle image velocimetry is effective and recording velocity profiles of biofouled surfaces along with shear stress data. Further studies should investigate other types of fouling and whether three-dimensional computational fluid dynamics simulations would be more effective for this purpose, and worth the additional computational cost. Keywords: boundary layer, biofouling, computational fluid dynamics, hydrofoi