91341 research outputs found
Sort by
Carl Maneri, Mathematics and Statistics
Get PDFKIn this May 10, 2024 oral history interview conducted by Kathy Morris, Carl Maneri reflects on his thirty-year career as a founding faculty member in Wright State University’s Department of Mathematics and Statistics. He discusses the university’s early development, faculty governance, departmental leadership, and the challenges of teaching first-generation students at a growing public institution
Best Integrated Writing Fall 2024 - Complete Edition
Get PDFBest Integrated Writing includes excellent student writing from Integrated Writing courses taught at Wright State University
Partner Or Perish: Tree Microbiomes And Climate Change
No full textTrees, as long-lived, sessile, and slowly evolving organisms, are disproportionally impacted by the impacts of climate change. Gradual and ongoing selective pressures over extended geologic timescales has provided coevolutionary opportunity for both the tree and its microbiome (holobiont) to improve tree fitness under changing conditions. This coevolution of the holobiont could infer phenological plasticity to trees to adapt to rapid climate shifts expected in the Anthropocene. Systems-based approaches founded on complex systems sciences, holobiome theory, combined with an understanding of coevolutionary history and application of suitable model systems will expose more opportunities to manipulate the holobiont and help us to grow climate-resilient trees and forests
Characterization Of Emerging Xanthomonas campestris Isolates On The Nonnative Weed Garlic Mustard Alliaria Petiolata
No full textNonnative plant infestations provide unique opportunities to investigate pathogen emergence with evolutionarily recent plant introduction events. The widespread distribution of invasive plants and their proximity to genetically related crops highlights the risks of nonnative plants acting as ancillary hosts and fostering microbial recombination and pathogen selection. Garlic mustard (Alliaria petiolata) is a widespread, nonnative cruciferous weed that grows throughout North America and along the forested edges of diverse agricultural fields. The recent identification of a novel Xanthomonas campestris pv. incanae strain isolated from a diseased A. petiolata population led to the current investigation of the distribution and diversity of X. campestris isolates from naturally infected A. petiolata. A total of 14 diseased A. petiolata sites were sampled across three states, leading to the identification of diverse X. campestris pathotypes and genotypes. Pathogenicity assays and multilocus sequence analyses identified pathogenic X. c. pv. incanae and X. c. pv. barbareae strains collected from disparate A. petiolata populations. Moreover, independently collected X. c. pv. incanae strains demonstrated a broad cruciferous host range by infecting cabbage (Brassica oleracea var. capitata), garden stock (Matthiola incana), and the cover crop yellow mustard (Guillenia flavescens). This study highlights the genetic variability and host potential of natural X. campestris populations and the potential risks to Brassica crops via widespread, dense garlic mustard reservoirs
Ecomorphology Of Longnose Gar (Lepisosteus osseus): On The Influence Of Size, Sex, And River Location
No full textEcomorphology is essential to understanding the evolution and biogeography of species. However, morphological studies that focus on nongame or ‘rough’ fish groups such as Gar (Lepisosteidae), outside of a phylogenetic context, are comparatively rare. Herein, we investigate the effects of sex, size, and location in a river to assess the potential for sexual dimorphism, allometry, habitat, or some combination to drive observed morphologic variation. Our dataset includes 230 Longnose Gars (Lepisosteus osseus) made up of both males and females of a wide range of sizes collected from three different sites corresponding to the upper, middle, and lower Great Pee Dee River in South Carolina. Dorsal and lateral photographs were taken from each specimen and landmarked for 2D geometric morphometric analyses. Discriminant function analyses (DFA) were also conducted on a few linear trusses to compare the accuracy of sex-related shape aspects that emerged from morphometrics as a possible field-based tool to help fisheries managers understand their stock populations. Overall, location was a statistically significant predictor of shape, yet the differences were not biologically meaningful. Additionally, sex and size were strong predictors of shape, with the greatest differences seen in the largest individuals. DFA of field measurements found that the Snout Length-to-Total Length ratio accurately predicted sex 71% of the time, with females having longer snouts than males. Differences in ratio between sexes can allow tentative sex assignments without lethal gonadal inspection. This study presents the first standardized whole-body 2D geometric morphometrics protocol for Longnose Gar
Interspecific Selection In A Diverse Mycorrhizal Symbiosis
No full textCoevolution describes evolutionary change in which two or more interacting species reciprocally drive each other’s evolution, potentially resulting in trait diversification and ecological speciation. Much progress has been made in analysis of its dynamics and consequences, but relatively little is understood about how coevolution works in multispecies interactions, i.e., those with diverse suites of species on one or both sides of an interaction. Interactions among plant hosts and their mutualistic ectomycorrhizal fungi (ECM) may provide an ecologically unique arena to examine the nature of selection in multispecies interactions. Using native genotypes of Monterey pine (Pinus radiata), we performed a common garden experiment at a field site that contains native stands to investigate selection from ECM fungi on pine traits. We planted seedlings from all five native populations, as well as inter-population crosses to represent intermediate phenotypes/genotypes, and measured seedling traits and ECM fungal traits to evaluate the potential for evolution in the symbiosis. We then combined field estimates of selection gradients with estimates of heritability and genetic variance–covariance matrices for multiple traits of the mutualism to determine which fungal traits drive plant fitness variation. We found evidence that certain fungal operational taxonomic units, families and species-level morphological traits by which ECM fungi acquire and transport nutrients exert selection on plant traits related to growth and allocation patterns. This work represents the first field-based, community-level study measuring multispecific coevolutionary selection in nutritional symbioses
The EASY-AI Symbology
No full textAs artificial intelligence (AI) surges into the forefront of research and the lives of everyday people, challenges in understanding and communicating how these systems operate are becoming more prevalent. The need for a common language for AI systems that allows for multidisciplinary understanding and communication is a prevalent topic within the field. In this work, we take the visual framework EASY-AI and create a symbolic system that overlays the framework’s ontology to facilitate such communication and understanding. Poster submission
When Will the Glomerular Filtration Rate in Former Preterm Neonates Catch Up With Their Term Peers?
No full textAims: Whether and when glomerular filtration rate (GFR) in preterms catches up with term peers is unknown. This study aims to develop a GFR maturation model for (pre)term-born individuals from birth to 18 years of age. Secondarily, the function is applied to data of different renally excreted drugs. Methods: We combined published inulin clearance values and serum creatinine (Scr) concentrations in (pre)term born individuals throughout childhood. Inulin clearance was assumed to be equal to GFR, and Scr to reflect creatinine synthesis rate/GFR. We developed a GFR function consisting of GFRbirth (GFR at birth), and an Emax model dependent on PNA (with GFRmax, PNA50 (PNA at which half of GFRmax is reached) and Hill coefficient). The final GFR model was applied to predict gentamicin, tobramycin and vancomycin concentrations. Result: In the GFR model, GFRbirth varied with birthweight linearly while in the PNA-based Emax equation, GA was the best covariate for PNA50, and current weight for GFRmax. The final model showed that for a child born at 26 weeks GA, absolute GFR is 18%, 63%, 80%, 92% and 96% of the GFR of a child born at 40 weeks GA at 1 month, 6 months, 1 year, 3 years and 12 years, respectively. PopPK models with the GFR maturation equations predicted concentrations of renally cleared antibiotics across (pre)term-born neonates until 18 years well. Conclusions: GFR of preterm individuals catches up with term peers at around three years of age, implying reduced dosages of renally cleared drugs should be considered below this age
Design and Analysis of Reliable and High Data Rate Multi-Carrier DCSK Transceiver With Index Modulation and Noise Suppression
No full textIn this article, we propose a novel efficient differential chaos shift keying (DCSK) scheme that delivers the user data using the index modulation-aided multicarrier DCSK with noise suppression (IM-MC-DCSK-NS). In this design, we use the time slot index, and the index of the orthogonal chaotic signals generated via the Hilbert transform, to modulate the user data to enhance the data rate with low complexity. Moreover, we propose to apply the noise suppression method to improve the reliability of the transmission. Moreover, we analyze the theoretical performance of the proposed transceiver, encompassing the bit error rate (BER), complexity, data rate, spectral efficiency, and energy efficiency. Furthermore, simulation results are provided to validate the effectiveness of the theoretical analysis. In addition, the results compared with up-to-date noncoherent chaotic communication benchmarks demonstrate that the proposed IM-MC-DCSK-NS system attains better reliability performance with lower complexity and higher data rate
Strain-Tuned Optical Properties of Bilayer Silicon at Midinfrared Wavelengths
No full textOptical properties of two-dimensional bilayer silicon have been explored at midinfrared wavelengths using density functional theory. In this work, progressive atomic structural deformation and the resultant variations in the optical properties of the bilayer silicon films were investigated under external in-plane strain. A phase transformation of the atomic structure has been observed at an applied in-plane tensile strain of 5.17%, at which the atomic lattice is changed from a low buckled to a buckle-free honeycomb structure. Evaluations of the optical properties were carried out by taking into account the inter- and intraband transitions. An abrupt change in the optical refraction index was observed at the phase transition. In addition, the buckle-free honeycomb structure presents a strain-resistive absorption edge pinned at 1.14 μm wavelength. Exceeding a strain threshold of 12.26% results in the development of both direct- and indirect-energy bandgap openings. The direct bandgap induced interband optical transitions, resulting in absorption peaks at midinfrared wavelengths and a drastic increase in the refraction index. Moreover, by adjusting the strain, the optical absorptions can be tuned in a wide range of wavelength at midinfrared from 1.5 to 11.5 μm