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Articles 2731 - 2760 of 45704
Full-Text Articles in Entire DC Network
Laboratory Exercise For The Radiometry Student, Michael A. Marciniak
Laboratory Exercise For The Radiometry Student, Michael A. Marciniak
Faculty Publications
The U.S. Air and Space Forces require optical expertise among their personnel. The Air Force Institute of Technology offers a graduate optics curriculum, which includes a three-course sequence to educate students in the optical concepts of radiometry and radiometric instrumentation. We find radiometry is often a deceptively difficult concept for students to master. To address this, we have developed an experiment in our optics-laboratory coursework to help them gain this mastery. A Fourier-transform infrared spectrometer (FTS) is used to collect spectral data from an unknown sample. FTS calibration and data collection are discussed here, as are the two specific samples …
Relative Vectoring Using Dual Object Detection For Autonomous Aerial Refueling, Derek B. Worth, Jeffrey L. Choate, James Lynch, Scott L. Nykl, Clark N. Taylor
Relative Vectoring Using Dual Object Detection For Autonomous Aerial Refueling, Derek B. Worth, Jeffrey L. Choate, James Lynch, Scott L. Nykl, Clark N. Taylor
Faculty Publications
Once realized, autonomous aerial refueling will revolutionize unmanned aviation by removing current range and endurance limitations. Previous attempts at establishing vision-based solutions have come close but rely heavily on near perfect extrinsic camera calibrations that often change midflight. In this paper, we propose dual object detection, a technique that overcomes such requirement by transforming aerial refueling imagery directly into receiver aircraft reference frame probe-to-drogue vectors regardless of camera position and orientation. These vectors are precisely what autonomous agents need to successfully maneuver the tanker and receiver aircraft in synchronous flight during refueling operations. Our method follows a common 4-stage process …
Testing Hypotheses Of Invasion Pathways Of The Ladybird Harmonia Axyridis Into And Across South Africa, Amy Collop, John S. Terblanche, Susana Clusella-Trullas, Jeff R. Garnas, Pius Bradicich, Minette Karsten
Testing Hypotheses Of Invasion Pathways Of The Ladybird Harmonia Axyridis Into And Across South Africa, Amy Collop, John S. Terblanche, Susana Clusella-Trullas, Jeff R. Garnas, Pius Bradicich, Minette Karsten
Faculty Publications
Harmonia axyridis is an invasive beetle (Coleoptera: Coccinellidae), native to Asia, that has established on four continents beyond its native range and was first observed in South Africa in 2001. Using microsatellite data and a comprehensive geographic coverage of international (17 locations) and South African (14 locations) beetle samples, we inferred the source of colonists invading South Africa and the beetle’s movement within the country. Genetic structure analyses suggest that this species’ populations in South Africa are derived from admixture between beetles originating from eastern North America (which acted as a bridgehead population) and another population not directly sampled in …
Ralph Waldo Emerson In Iowa: When The Popular Essayist Walked On Water, Roy R. Behrens
Ralph Waldo Emerson In Iowa: When The Popular Essayist Walked On Water, Roy R. Behrens
Faculty Publications
No abstract provided.
An Evening With Bach, Teleman, & Vivaldi, Marianne Kordas
An Evening With Bach, Teleman, & Vivaldi, Marianne Kordas
Faculty Publications
Program Notes
Extending Irrigation Reservoir Histories For Improved Groundwater Modeling And Conjunctive Water Management In Two Arkansas Critical Groundwater Areas, Daniel D. Shults, Michele L. Reba, John W. Nowlin, Joseph Massey, Quentin Read
Extending Irrigation Reservoir Histories For Improved Groundwater Modeling And Conjunctive Water Management In Two Arkansas Critical Groundwater Areas, Daniel D. Shults, Michele L. Reba, John W. Nowlin, Joseph Massey, Quentin Read
Faculty Publications
Agricultural land managers in the Mississippi Alluvial Plain rely on the Mississippi River Valley Alluvial Aquifer for the majority of the water used for irrigation in the region. Pumping that outpaces recharge has resulted in significant cones of depression in the region, increasing pumping costs and forcing producers to use more surface water, often in the form of constructing on-farm storage reservoirs. At the same time, efforts are underway to improve groundwater models to run scenarios of conjunctive water management in the region. The improved models require accurate depiction of how the system is being managed including the use of …
Salt Water Exposure Exacerbates The Negative Response Of Phragmites Australis Haplotypes To Sea-Level Rise, Austin Lynn, Tracy Elsey-Quirk
Salt Water Exposure Exacerbates The Negative Response Of Phragmites Australis Haplotypes To Sea-Level Rise, Austin Lynn, Tracy Elsey-Quirk
Faculty Publications
The response of coastal wetlands to sea-level rise (SLR) largely depends on the tolerance of individual plant species to inundation stress and, in brackish and freshwater wetlands, exposure to higher salinities. Phragmites australis is a cosmopolitan wetland reed that grows in saline to freshwater marshes. P. australis has many genetically distinct haplotypes, some of which are invasive and the focus of considerable research and management. However, the relative response of P. australis haplotypes to SLR is not well known, despite the importance of predicting future distribution changes and understanding its role in marsh response and resilience to SLR. Here, we …
Deconstructing The Mangrove Carbon Cycle: Gains, Transformation, And Losses, M. F. Adame, N. Cormier, P. Taillardat, N. Iram, A. Rovai, T. M. Sloey, E. S. Yando, J. F. Blanco-Libreros, M. Arnaud, T. Jennerjahn, C. E. Lovelock, D. Friess, G. M.S. Reithmaier, C. A. Buelow, S. M. Muhammad-Nor, R. R. Twilley, R. A. Ribeiro
Deconstructing The Mangrove Carbon Cycle: Gains, Transformation, And Losses, M. F. Adame, N. Cormier, P. Taillardat, N. Iram, A. Rovai, T. M. Sloey, E. S. Yando, J. F. Blanco-Libreros, M. Arnaud, T. Jennerjahn, C. E. Lovelock, D. Friess, G. M.S. Reithmaier, C. A. Buelow, S. M. Muhammad-Nor, R. R. Twilley, R. A. Ribeiro
Faculty Publications
Mangroves are one of the most carbon-dense forests on the Earth and have been highlighted as key ecosystems for climate change mitigation and adaptation. Hundreds of studies have investigated how mangroves fix, transform, store, and export carbon. Here, we review and synthesize the previously known and emerging carbon pathways in mangroves, including gains (woody biomass accumulation, deadwood accumulation, soil carbon sequestration, root and litterfall production), transformations (food web transfer through herbivory, decomposition), and losses (respiration as CO2 and CH4, litterfall export, particulate and dissolved carbon export). We then review the technologies available to measure carbon fluxes in mangroves, their potential, …
Spatial Distribution And Movement Of Atlantic Tarpon (Megalops Atlanticus) In The Northern Gulf Of Mexico, Shane A. Stephens, Michael A. Dance, Michelle Zapp Sluis, Richard J. Kline, Matthew K. Streich, Gregory W. Stunz, Aaron J. Adams, R. J.David Wells, Jay R. Rooker
Spatial Distribution And Movement Of Atlantic Tarpon (Megalops Atlanticus) In The Northern Gulf Of Mexico, Shane A. Stephens, Michael A. Dance, Michelle Zapp Sluis, Richard J. Kline, Matthew K. Streich, Gregory W. Stunz, Aaron J. Adams, R. J.David Wells, Jay R. Rooker
Faculty Publications
Atlantic tarpon (Megalops atlanticus) are capable of long-distance migrations (hundreds of kilometers) but also exhibit resident behaviors in estuarine and coastal habitats. The aim of this study was to characterize the spatial distribution of juvenile tarpon and identify migration pathways of adult tarpon in the northern Gulf of Mexico. Spatial distribution of juvenile tarpon was investigated using gillnet data collected by Texas Parks and Wildlife Department (TPWD) over the past four decades. Generalized additive models (GAMs) indicated that salinity and water temperature played a significant role in tarpon presence, with tarpon occurrences peaking in the fall and increasing over the …
Achieving Equity In Child And Adolescent Mental Health By Addressing Racism Through Prevention Science, Nada M. Goodrum, Daniel K. Cooper, Sarah Edmunds, Guillermo M. Wippold, Jessica Bradshaw, Julie K. Nguyen, Norweeta Milburn, Funlola Are
Achieving Equity In Child And Adolescent Mental Health By Addressing Racism Through Prevention Science, Nada M. Goodrum, Daniel K. Cooper, Sarah Edmunds, Guillermo M. Wippold, Jessica Bradshaw, Julie K. Nguyen, Norweeta Milburn, Funlola Are
Faculty Publications
Prevention science is a multidisciplinary field dedicated to promoting public health and reducing early risk factors that lead to negative health outcomes. It has been used to successfully improve child and family mental health and well-being, including for families affected by adversity. Despite advances in prevention efforts, major public health inequities remain for Black, Indigenous, and other People of Color (BIPOC) children and families, in part because of equity-implicit “one-size-fits-all” approaches that do not directly address racism which in part underlies the very health concerns these efforts aim to prevent. Structural racism not only introduces additional risk for negative health …
Speculating About Genocide: The Queensland Frontier 1859–1897, Mark Finnane, Jonathan Richards
Speculating About Genocide: The Queensland Frontier 1859–1897, Mark Finnane, Jonathan Richards
Faculty Publications
In the colonisation of Queensland, Australia it is commonly accepted that large numbers of Indigenous people were killed in the second half of the nineteenth century. Calculations of violent mortality have recently been revised radically upwards. We suggest that the methodology deployed in these new studies is unreliable, reflecting errors in counting and calculation, as well as underestimating the selection bias of the samples. We caution against projecting aggregate violent mortality where the underlying data are so imperfect and emphasise the value of more detailed local and regional studies to inform better understanding of colonisation's impact on First Peoples.
Worldwide Forest Surveys Reveal Forty-Three New Species In Phytophthora Major Clade 2 With Fundamental Implications For The Evolution And Biogeography Of The Genus And Global Plant Biosecurity, T. Jung, I. Milenković, Y. Balci, J. Janoušek, T. Kudláček, Z. Nagy, B. Baharuddin, J. Bakonyi, K. D. Broders, S. O. Cacciola, T. T. Chang, N. M. Chi, T. Corcobado, A. Cravador, B. Dordević, A. Durán, M. Ferreira, C. H. Fu, L. Garcia, A. Hieno, H. H. Ho, C. Hong, M. Junaid, K. Kageyama, T. Kuswinanti, C. Maia, T. Májek, H. Masuya, G. Magnano Di San Lio, B. Mendieta-Araica, N. Nasri, L. S.S. Oliveira, A. Pane
Worldwide Forest Surveys Reveal Forty-Three New Species In Phytophthora Major Clade 2 With Fundamental Implications For The Evolution And Biogeography Of The Genus And Global Plant Biosecurity, T. Jung, I. Milenković, Y. Balci, J. Janoušek, T. Kudláček, Z. Nagy, B. Baharuddin, J. Bakonyi, K. D. Broders, S. O. Cacciola, T. T. Chang, N. M. Chi, T. Corcobado, A. Cravador, B. Dordević, A. Durán, M. Ferreira, C. H. Fu, L. Garcia, A. Hieno, H. H. Ho, C. Hong, M. Junaid, K. Kageyama, T. Kuswinanti, C. Maia, T. Májek, H. Masuya, G. Magnano Di San Lio, B. Mendieta-Araica, N. Nasri, L. S.S. Oliveira, A. Pane
Faculty Publications
During 25 surveys of global Phytophthora diversity, conducted between 1998 and 2020, 43 new species were detected in natural ecosystems and, occasionally, in nurseries and outplantings in Europe, Southeast and East Asia and the Americas. Based on a multigene phylogeny of nine nuclear and four mitochondrial gene regions they were assigned to five of the six known subclades, 2a-c, e and f, of Phytophthora major Clade 2 and the new subclade 2g. The evolutionary history of the Clade appears to have involved the pre-Gondwanan divergence of three extant subclades, 2c, 2e and 2f, all having disjunct natural distributions on separate …
Influence Of Hesperidin On The Physico-Chemical, Microbiological And Sensory Characteristics Of Frozen Yogurt †, Roberto Cedillos, Ricardo S. Aleman, Ryan Page, Douglas W. Olson, Charles Boeneke, Witoon Prinyawiwatkul, Kayanush Aryana
Influence Of Hesperidin On The Physico-Chemical, Microbiological And Sensory Characteristics Of Frozen Yogurt †, Roberto Cedillos, Ricardo S. Aleman, Ryan Page, Douglas W. Olson, Charles Boeneke, Witoon Prinyawiwatkul, Kayanush Aryana
Faculty Publications
Frozen yogurts contain yogurt culture bacteria, which might impart health benefits to their consumers. Global frozen yogurt market sales are expected to grow by 4.8% by 2028, which represents an important opportunity for the industry, consumers and researchers. Polyphenols are metabolites found in plants which have antioxidant and anti-inflammatory properties and might prevent chronic diseases such as cancer, diabetes and cardiovascular diseases. The objective of this study was to elucidate the effect of the polyphenol hesperidin on the physico-chemical, microbiological and sensory characteristics of frozen yogurts. Hesperidin was incorporated into frozen yogurt at three concentrations (125, 250 and 500 mg/90 …
Transformative Insights: Break Up With Salt (Buws) Program’S Short-Term Influence On Hypertension Risk Factors, Jean Pierre Enriquez, Helena Salgado, Christopher Kuetsinya, Li Hsiang Lin, Elizabeth Gollub
Transformative Insights: Break Up With Salt (Buws) Program’S Short-Term Influence On Hypertension Risk Factors, Jean Pierre Enriquez, Helena Salgado, Christopher Kuetsinya, Li Hsiang Lin, Elizabeth Gollub
Faculty Publications
Break Up with Salt (BUWS) is a four-session community-based nutrition education program aimed at reducing key controllable hypertension risk factors. This pilot study utilized a pre-post survey design to assess short-term outcomes on food behaviors (including DASH diet eating patterns), physical activity, and overall well-being, in two groups of participants. The first “pilot” group (n = 25) completed a comprehensive, 16-item survey; the second “abbreviated” group (n = 27) completed a 5-item survey. The pilot group experienced improvements in whole grain (p = 0.04), sweetened beverage consumption, watching/reducing sodium (p = 0.04) and fat (p = 0.05) consumption, and time …
Natural Incidence Of Stem Borer Damage In U.S. Rice Varieties, Michael J. Stout, Kevin Mccarter, James M. Villegas, Blake E. Wilson
Natural Incidence Of Stem Borer Damage In U.S. Rice Varieties, Michael J. Stout, Kevin Mccarter, James M. Villegas, Blake E. Wilson
Faculty Publications
Lepidopteran stem borers (Crambidae) are economically important pests of rice in Louisiana and Texas, and diversified management tactics are needed. Rice varieties differ in susceptibility to stem borers, but resistance has not been studied in modern varieties. Analysis of stem borer injury levels (densities of unfilled panicles or “whiteheads”) was conducted on data from 37 separate field experiments in Acadia and Calcasieu Parishes, LA from 2016 to 2021. In all years, stem borer infestations were predominantly comprised of the Mexican rice borer, Eoreuma loftini (Dyar). Whitehead density was least in 2016 (0.1 whiteheads m−2) and greatest in 2019 (4.0). Across …
Seven-Year Prospective Study On Yearly Incidence Of Orbivirus Infection Of Captive White-Tailed Deer And Potential Culicoides Vectors, Michael Becker, Glen Gentry, Claudia Husseneder, Lane Foil
Seven-Year Prospective Study On Yearly Incidence Of Orbivirus Infection Of Captive White-Tailed Deer And Potential Culicoides Vectors, Michael Becker, Glen Gentry, Claudia Husseneder, Lane Foil
Faculty Publications
Bluetongue virus (BTV) and epizootic hemorrhagic disease virus (EHDV) are arthropod-borne viruses that are transmitted by biting midges in the genus Culicoides (Diptera: Ceratopogonidae) and can cause hemorrhagic disease in certain ruminants. The objectives of this study were to measure the incidence of BTV and EHDV infections in captive white-tailed deer herd as well as tissues and corresponding presence of Culicoides midges at a location near Clinton, LA. During a 7-yr study with yearly outbreaks of hemorrhagic disease in the deer herd, 15 species of Culicoides were captured using Centers for Disease Control (CDC) black light traps. Reverse transcriptase quantitative …
Application Of Tensorflow Model For Identification Of Herbaceous Mimosa (Mimosa Strigillosa) From Digital Images, T. Setiyono, T. Gentimis, F. Rontani, D. Duron, G. Bortolon, R. Adhikari, B. Acharya, K. J. Han, W. D. Pitman
Application Of Tensorflow Model For Identification Of Herbaceous Mimosa (Mimosa Strigillosa) From Digital Images, T. Setiyono, T. Gentimis, F. Rontani, D. Duron, G. Bortolon, R. Adhikari, B. Acharya, K. J. Han, W. D. Pitman
Faculty Publications
This study explored the use of TensorFlow image recognition model to identify herbaceous mimosa (Mimosa strigillosa) from digital images. There is a demand for such technology toward digital mapping of the spatial distribution of these important perennial legumes in the context of pasture management and as well as management of reclamation ground cover landscapes. This study provided evidence of successful application of TensorFlow model for identification of herbaceous mimosa from digital images with final accuracy of 95 % or more. The complexity of ground images of multiple objects in this study is suspected to induce fluctuations in validation accuracy. Such …
Sustainable Sweetpotato Production In The United States: Current Status, Challenges, And Opportunities, Justin George, Gadi V.P. Reddy, Phillip A. Wadl, William Rutter, Julianna Culbreath, Pierre W. Lau, Tahir Rashid, Matthew C. Allan, Suzanne D. Johaningsmeier, Amanda M. Nelson, Ming Li Wang, Augustine Gubba, Kai Shu Ling, Yan Meng, Daniel J. Collins, Sathish K. Ponniah, Prasanna H. Gowda
Sustainable Sweetpotato Production In The United States: Current Status, Challenges, And Opportunities, Justin George, Gadi V.P. Reddy, Phillip A. Wadl, William Rutter, Julianna Culbreath, Pierre W. Lau, Tahir Rashid, Matthew C. Allan, Suzanne D. Johaningsmeier, Amanda M. Nelson, Ming Li Wang, Augustine Gubba, Kai Shu Ling, Yan Meng, Daniel J. Collins, Sathish K. Ponniah, Prasanna H. Gowda
Faculty Publications
Sweetpotato (Ipomoea batatas L.) is an important staple crop cultivated in over 100 countries, and the storage roots and vines provide food for humans and livestock. Sweetpotato consumption and demand for its value-added products have increased significantly in the last two decades and have led to new cultivar development, expansion in acreage, and increased demand in the United States and its export markets. Despite the known nutritional components and other health benefits, further research is needed to characterize the genetic diversity and chemical composition related to their storage root qualities, essential in developing consumer-preferred cultivars that offer host plant resistance …
Growing The Next Generation Of Horticulture Customers And Stakeholders Through Industry And Extension Outreach Collaborations1, Natalie Bumgarner, Alicia Rihn, Julie Campbell, Sheri Dorn, Heather Kirk-Ballard
Growing The Next Generation Of Horticulture Customers And Stakeholders Through Industry And Extension Outreach Collaborations1, Natalie Bumgarner, Alicia Rihn, Julie Campbell, Sheri Dorn, Heather Kirk-Ballard
Faculty Publications
As the horticulture consumer base transitions to younger generations, educational outreach collaborations between Extension and industry could be a mutually beneficial way to serve an increasingly diverse customer audience. A recent study investigated drivers of, and opportunities for, increased participation in plant-related activities using an online survey of 2,134 respondents. Both participants and non-participants in plant-related activities were surveyed. Some of the commonly cited reasons for non-participation were a lack of knowledge and overall success, illustrating an opportunity for education to be beneficial. While many plant retailers may not have the personnel or resources to engage widely in education, collaborations …
An Island ‘Endemic’ Born Out Of Hybridization Between Introduced Lineages, Jessie F. Salter, Robb T. Brumfield, Brant C. Faircloth
An Island ‘Endemic’ Born Out Of Hybridization Between Introduced Lineages, Jessie F. Salter, Robb T. Brumfield, Brant C. Faircloth
Faculty Publications
Humans have profoundly impacted the distribution of plant and animal species over thousands of years. The most direct example of these effects is human-mediated movement of individuals, either through translocation of individuals within their range or through the introduction of species to new habitats. While human involvement may be suspected in species with obvious range disjunctions, it can be difficult to detect natural versus human-mediated dispersal events for populations at the edge of a species' range, and this uncertainty muddles how we understand the evolutionary history of populations and broad biogeographical patterns. Studies combining genetic data with archaeological, linguistic and …
The Expected Behaviors Of Posterior Predictive Tests And Their Unexpected Interpretation, Luiza Guimarães Fabreti, Lyndon M. Coghill, Robert C. Thomson, Sebastian Höhna, Jeremy M. Brown
The Expected Behaviors Of Posterior Predictive Tests And Their Unexpected Interpretation, Luiza Guimarães Fabreti, Lyndon M. Coghill, Robert C. Thomson, Sebastian Höhna, Jeremy M. Brown
Faculty Publications
Poor fit between models of sequence or trait evolution and empirical data is known to cause biases and lead to spurious conclusions about evolutionary patterns and processes. Bayesian posterior prediction is a flexible and intuitive approach for detecting such cases of poor fit. However, the expected behavior of posterior predictive tests has never been characterized for evolutionary models, which is critical for their proper interpretation. Here, we show that the expected distribution of posterior predictive P-values is generally not uniform, in contrast to frequentist P-values used for hypothesis testing, and extreme posterior predictive P-values often provide more evidence of poor …
Using Risk Ratios To Quantify Potential Behavior-Environment Relations, P. Raymond Joslyn, Samuel L. Morris
Using Risk Ratios To Quantify Potential Behavior-Environment Relations, P. Raymond Joslyn, Samuel L. Morris
Faculty Publications
Behavior-environment functional relations are the units of explanation in applied behavior analysis (ABA). Whether hypothesized experimentally or descriptively, quantification of putative functional relations improves our ability to predict and influence behavior. Risk ratios are an accessible, straightforward quantitative analysis that can serve this purpose. They have been employed to great effect in other fields (e.g., medicine, public health), but are rarely used within ABA. In this tutorial, we describe risk ratios and how they are calculated, discuss why risk ratios are well suited for quantifying behavior–environment relations, and illustrate their utility and applicability across five demonstrations from real clinical cases. …
Genome-Wide Polygenic Risk Score For Ckd In Individuals With Apol1 High-Risk Genotypes, Ha My T. Vy, Steven G. Coca, Ashwin Sawant, Ankit Sakhuja, Orlando M. Gutierrez, Richard Cooper, Ruth J.F. Loos, Carol R. Horowitz, Ron Do, Girish N. Nadkarni
Genome-Wide Polygenic Risk Score For Ckd In Individuals With Apol1 High-Risk Genotypes, Ha My T. Vy, Steven G. Coca, Ashwin Sawant, Ankit Sakhuja, Orlando M. Gutierrez, Richard Cooper, Ruth J.F. Loos, Carol R. Horowitz, Ron Do, Girish N. Nadkarni
Faculty Publications
No abstract provided.
Coastal Wetland Restoration Through The Lens Of Odum's Theory Of Ecosystem Development, Friedrich W. Keppeler, Annette S. Engel, Linda M. Hooper-Bùi, Paola C. López-Duarte, Charles W. Martin, Jill A. Olin, Katelyn J. Lamb, Michael J. Polito, Nancy N. Rabalais, Brian J. Roberts, Erick M. Swenson, Olaf P. Jensen
Coastal Wetland Restoration Through The Lens Of Odum's Theory Of Ecosystem Development, Friedrich W. Keppeler, Annette S. Engel, Linda M. Hooper-Bùi, Paola C. López-Duarte, Charles W. Martin, Jill A. Olin, Katelyn J. Lamb, Michael J. Polito, Nancy N. Rabalais, Brian J. Roberts, Erick M. Swenson, Olaf P. Jensen
Faculty Publications
Advancing ecological restoration assessments requires a more detailed consideration of species interactions and ecosystem processes. Most restoration projects rely on a few metrics not always directly linked with ecological theory. Here, we used Odum's theory of ecosystem development to assess and compare the ecosystem structure and services of created marshes (4–6 years old) with preexisting, reference marshes in a brackish water region of the Mississippi River Delta. We built ecosystem models for created and reference marshes that integrated large datasets of stomach contents, stable isotopes, and taxa abundances. Despite strong resemblance in community structure, created marshes were at an earlier …
Spatial Heterogeneity And Oil Pollution Structured The Soil Microbial Community In Salt Marshes In Barataria Bay, Louisiana, Usa, Eight Years After The Deepwater Horizon Oil Spill, Grace A. Cagle, Huan Chen, John W. Fleeger, Donald Deis, Qianxin Lin, Aixin Hou
Spatial Heterogeneity And Oil Pollution Structured The Soil Microbial Community In Salt Marshes In Barataria Bay, Louisiana, Usa, Eight Years After The Deepwater Horizon Oil Spill, Grace A. Cagle, Huan Chen, John W. Fleeger, Donald Deis, Qianxin Lin, Aixin Hou
Faculty Publications
The Deepwater Horizon (DWH) oil spill significantly impacted salt marsh ecosystems, with numerous repercussions observed in the subsequent years. However, the long-term effects of chronic oil exposure on soil microbial communities remain unexplored. This study, conducted in 2018, aimed to identify how the legacy of heavy oiling from the DWH spill in 2010 influenced the soil microbial community. We surveyed vegetation and soil variables while simultaneously employing high-throughput 16s rRNA gene sequencing to examine microbial communities in soils across 21 marsh sites that exhibited varying degrees of initial oil contamination following the DWH incident. The effects of these variables, including …
Evidence For Evolved Stellar Binary Mergers In Observed B-Type Blue Supergiants, Athira Menon, Andrea Ercolino, Miguel A. Urbaneja, Daniel J. Lennon, Artemio Herrero, Ryosuke Hirai, Norbert Langer, Abel Schootemeijer, Emmanouil Chatzopoulos, Juhan Frank, Sagiv Shiber
Evidence For Evolved Stellar Binary Mergers In Observed B-Type Blue Supergiants, Athira Menon, Andrea Ercolino, Miguel A. Urbaneja, Daniel J. Lennon, Artemio Herrero, Ryosuke Hirai, Norbert Langer, Abel Schootemeijer, Emmanouil Chatzopoulos, Juhan Frank, Sagiv Shiber
Faculty Publications
Blue supergiants are the brightest stars in their host galaxies, and yet their evolutionary status has been a long-standing problem in stellar astrophysics. In this pioneering work, we present a large sample of 59 early B-type supergiants in the Large Magellanic Cloud with newly derived stellar parameters and identify the signatures of stars born from binary mergers among them. We simulate novel 1D merger models of binaries consisting of post main-sequence giants with helium-rich cores (primaries) and main-sequence companions (secondaries), and consider the effects of interaction of the secondary with the core of the primary along with the mixing induced …
Searches For Baryon Number Violation In Neutrino Experiments: A White Paper, P. S.B. Dev, L. W. Koerner, S. Saad, S. Antusch, M. Askins, K. S. Babu, J. L. Barrow, J. Chakrabortty, A. De Gouvêa, Z. Djurcic, S. Girmohanta, I. Gogoladze, M. C. Goodman, A. Higuera, D. Kalra, G. Karagiorgi, E. Kearns, V. A. Kudryavtsev, T. Kutter, M. Malinský, D. A. Martinez Caicedo, R. N. Mohapatra, P. Nath, S. Nussinov, J. P. Ochoa-Ricoux, V. Pec, A. Rafique, J. Rodriguez Rondon, R. Shrock, H. W. Sobel, T. Stokes, M. Strait, R. Svoboda
Searches For Baryon Number Violation In Neutrino Experiments: A White Paper, P. S.B. Dev, L. W. Koerner, S. Saad, S. Antusch, M. Askins, K. S. Babu, J. L. Barrow, J. Chakrabortty, A. De Gouvêa, Z. Djurcic, S. Girmohanta, I. Gogoladze, M. C. Goodman, A. Higuera, D. Kalra, G. Karagiorgi, E. Kearns, V. A. Kudryavtsev, T. Kutter, M. Malinský, D. A. Martinez Caicedo, R. N. Mohapatra, P. Nath, S. Nussinov, J. P. Ochoa-Ricoux, V. Pec, A. Rafique, J. Rodriguez Rondon, R. Shrock, H. W. Sobel, T. Stokes, M. Strait, R. Svoboda
Faculty Publications
Baryon number conservation is not guaranteed by any fundamental symmetry within the standard model, and therefore has been a subject of experimental and theoretical scrutiny for decades. So far, no evidence for baryon number violation has been observed. Large underground detectors have long been used for both neutrino detection and searches for baryon number violating processes. The next generation of large neutrino detectors will seek to improve upon the limits set by past and current experiments and will cover a range of lifetimes predicted by several Grand Unified Theories. In this White Paper, we summarize theoretical motivations and experimental aspects …
X-Ray Polarimetry Of The Dipping Accreting Neutron Star 4u1624–49, M. Lynne Saade, Philip Kaaret, Andrea Gnarini, Juri Poutanen, Francesco Ursini, Stefano Bianchi, Anna Bobrikova, Fabio La Monaca, Alessandro Di Marco, Fiamma Capitanio, Alexandra Veledina, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Simone Castellano, Elisabetta Cavazzuti, Chien Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolò Di Lalla, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak
X-Ray Polarimetry Of The Dipping Accreting Neutron Star 4u1624–49, M. Lynne Saade, Philip Kaaret, Andrea Gnarini, Juri Poutanen, Francesco Ursini, Stefano Bianchi, Anna Bobrikova, Fabio La Monaca, Alessandro Di Marco, Fiamma Capitanio, Alexandra Veledina, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Simone Castellano, Elisabetta Cavazzuti, Chien Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolò Di Lalla, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak
Faculty Publications
We present the first X-ray polarimetric study of the dipping accreting neutron star 4U 1624−49 with the Imaging X-ray Polarimetry Explorer. We report a detection of polarization in the nondip time intervals with a confidence level of 99.99%. We find an average polarization degree (PD) of 3.1% ± 0.7% and a polarization angle of 81° ± 6° east of north in the 2–8 keV band. We report an upper limit on the PD of 22% during the X-ray dips with 95% confidence. The PD increases with energy, reaching from 3.0% ± 0.9% in the 4–6 keV band to 6% ± …
Detection Of X-Ray Polarization From The Blazar 1es 1959+650 With The Imaging X-Ray Polarimetry Explorer, Manel Errando, Ioannis Liodakis, Alan P. Marscher, Herman L. Marshall, Riccardo Middei, Michela Negro, Abel Lawrence Peirson, Matteo Perri, Simonetta Puccetti, Pazit L. Rabinowitz, Iván Agudo, Svetlana G. Jorstad, Sergey S. Savchenko, Dmitry Blinov, Ioakeim G. Bourbah, Sebastian Kiehlmann, Evangelos Kontopodis, Nikos Mandarakas, Stylianos Romanopoulos, Raphael Skalidis, Anna Vervelaki, Francisco José Aceituno, Maria I. Bernardos, Giacomo Bonnoli, Víctor Casanova, Beatriz Agís-González, César Husillos, Alessandro Marchini, Alfredo Sota, Pouya M. Kouch, Elina Lindfors, Carolina Casadio, Juan Escudero
Detection Of X-Ray Polarization From The Blazar 1es 1959+650 With The Imaging X-Ray Polarimetry Explorer, Manel Errando, Ioannis Liodakis, Alan P. Marscher, Herman L. Marshall, Riccardo Middei, Michela Negro, Abel Lawrence Peirson, Matteo Perri, Simonetta Puccetti, Pazit L. Rabinowitz, Iván Agudo, Svetlana G. Jorstad, Sergey S. Savchenko, Dmitry Blinov, Ioakeim G. Bourbah, Sebastian Kiehlmann, Evangelos Kontopodis, Nikos Mandarakas, Stylianos Romanopoulos, Raphael Skalidis, Anna Vervelaki, Francisco José Aceituno, Maria I. Bernardos, Giacomo Bonnoli, Víctor Casanova, Beatriz Agís-González, César Husillos, Alessandro Marchini, Alfredo Sota, Pouya M. Kouch, Elina Lindfors, Carolina Casadio, Juan Escudero
Faculty Publications
Observations of linear polarization in the 2-8 keV energy range with the Imaging X-ray Polarimetry Explorer (IXPE) explore the magnetic field geometry and dynamics of the regions generating nonthermal radiation in relativistic jets of blazars. These jets, particularly in blazars whose spectral energy distribution peaks at X-ray energies, emit X-rays via synchrotron radiation from high-energy particles within the jet. IXPE observations of the X-ray-selected BL Lac-type blazar 1ES 1959+650 on 2022 May 3-4 showed a significant linear polarization degree of Πx = 8.0% ± 2.3% at an electric-vector position angle ψ x = 123° ± 8°. However, on 2022 June …
Systematic Kmtnet Planetary Anomaly Search. X. Complete Sample Of 2017 Prime-Field Planets, Yoon Hyun Ryu, Andrzej Udalski, Jennifer C. Yee, Weicheng Zang, Yossi Shvartzvald, Cheongho Han, Andrew Gould, Michael D. Albrow, Sun Ju Chung, Kyu Ha Hwang, Youn Kil Jung, In Gu Shin, Hongjing Yang, Sang Mok Cha, Dong Jin Kim, Seung Lee Kim, Chung Uk Lee, Dong Joo Lee, Yongseok Lee, Byeong Gon Park, Richard W. Pogge, Hanyue Wang, Przemek Mróz, Michał K. Szymański, Jan Skowron, Radek Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona
Systematic Kmtnet Planetary Anomaly Search. X. Complete Sample Of 2017 Prime-Field Planets, Yoon Hyun Ryu, Andrzej Udalski, Jennifer C. Yee, Weicheng Zang, Yossi Shvartzvald, Cheongho Han, Andrew Gould, Michael D. Albrow, Sun Ju Chung, Kyu Ha Hwang, Youn Kil Jung, In Gu Shin, Hongjing Yang, Sang Mok Cha, Dong Jin Kim, Seung Lee Kim, Chung Uk Lee, Dong Joo Lee, Yongseok Lee, Byeong Gon Park, Richard W. Pogge, Hanyue Wang, Przemek Mróz, Michał K. Szymański, Jan Skowron, Radek Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona
Faculty Publications
We complete the analysis of planetary candidates found by the KMT AnomalyFinder for the 2017 prime fields that cover ∼13 deg2. We report three unambiguous planets: OGLE-2017-BLG-0640, OGLE-2017-BLG-1275, and OGLE-2017-BLG-1237. The first two of these were not previously identified, while the last was not previously published due to technical complications induced by a nearby variable. We further report that a fourth anomalous event, the previously recognized OGLE-2017-BLG-1777, is very likely to be planetary, although its light curve requires unusually complex modeling because the lens and source both have orbiting companions. One of the three unambiguous planets, OGLE-2017-BLG-1275, is …