38,184 results on '"Alex, J."'
Search Results
102. CASCADE: Dataset of extant coccolithophore size, carbon content and global distribution
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de Vries, Joost, Poulton, Alex J., Young, Jeremy R., Monteiro, Fanny M., Sheward, Rosie M., Johnson, Roberta, Hagino, Kyoko, Ziveri, Patrizia, and Wolf, Levi J.
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- 2024
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103. Whole genome sequencing refines stratification and therapy of patients with clear cell renal cell carcinoma
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Culliford, Richard, Lawrence, Samuel E. D., Mills, Charlie, Tippu, Zayd, Chubb, Daniel, Cornish, Alex J., Browning, Lisa, Kinnersley, Ben, Bentham, Robert, Sud, Amit, Pallikonda, Husayn, Frangou, Anna, Gruber, Andreas J., Litchfield, Kevin, Wedge, David, Larkin, James, Turajlic, Samra, and Houlston, Richard S.
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- 2024
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104. Consistency, completeness and external validity of ethnicity recording in NHS primary care records: a cohort study in 25 million patients’ records at source using OpenSAFELY
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Andrews, Colm D., Mathur, Rohini, Massey, Jon, Park, Robin, Curtis, Helen J., Hopcroft, Lisa, Mehrkar, Amir, Bacon, Seb, Hickman, George, Smith, Rebecca, Evans, David, Ward, Tom, Davy, Simon, Inglesby, Peter, Dillingham, Iain, Maude, Steven, O’Dwyer, Thomas, Butler-Cole, Ben F. C., Bridges, Lucy, Bates, Chris, Parry, John, Hester, Frank, Harper, Sam, Cockburn, Jonathan, Goldacre, Ben, MacKenna, Brian, Tomlinson, Laurie A., Walker, Alex J., and Hulme, William J.
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- 2024
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105. A decomposition of light’s spin angular momentum density
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Vernon, Alex J., Golat, Sebastian, Rigouzzo, Claire, Lim, Eugene A., and Rodríguez-Fortuño, Francisco J.
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- 2024
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106. Cellular morphological trait dataset for extant coccolithophores from the Atlantic Ocean
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Sheward, Rosie M., Poulton, Alex J., Young, Jeremy R., de Vries, Joost, Monteiro, Fanny M., and Herrle, Jens O.
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- 2024
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107. Biomarkers of mortality in adults and adolescents with advanced HIV in sub-Saharan Africa
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Riitho, Victor, Connon, Roisin, Gwela, Agnes, Namusanje, Josephine, Nhema, Ruth, Siika, Abraham, Bwakura-Dangarembizi, Mutsa, Musiime, Victor, Berkley, James A., Szubert, Alex J., Gibb, Diana M., Walker, A. Sarah, Klein, Nigel, and Prendergast, Andrew J.
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- 2024
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108. Longitudinal tracking of hemocyte populations in vivo indicates lineage relationships and supports neural progenitor identity in adult neurogenesis
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Edwards, Alex J. and Beltz, Barbara S.
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- 2024
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109. Structural and biophysical insights into targeting of claudin-4 by a synthetic antibody fragment
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Erramilli, Satchal K., Dominik, Pawel K., Ogbu, Chinemerem P., Kossiakoff, Anthony A., and Vecchio, Alex J.
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- 2024
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110. Emergent digital bio-computation through spatial diffusion and engineered bacteria
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Fedorec, Alex J. H., Treloar, Neythen J., Wen, Ke Yan, Dekker, Linda, Ong, Qing Hsuan, Jurkeviciute, Gabija, Lyu, Enbo, Rutter, Jack W., Zhang, Kathleen J. Y., Rosa, Luca, Zaikin, Alexey, and Barnes, Chris P.
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- 2024
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111. Genetic landscape of interval and screen detected breast cancer
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Mills, Charlie, Sud, Amit, Everall, Andrew, Chubb, Daniel, Lawrence, Samuel E. D., Kinnersley, Ben, Cornish, Alex J., Bentham, Robert, and Houlston, Richard S.
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- 2024
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112. Inhibition of caspase pathways limits CD4+ T cell loss and restores host anti-retroviral function in HIV-1 infected humanized mice with augmented lymphoid tissue
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Holloway, Alex J., Saito, Tais B., Naqvi, Kubra F., Huante, Matthew B., Fan, Xiuzhen, Lisinicchia, Joshua G., Gelman, Benjamin B., Endsley, Janice J., and Endsley, Mark A.
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- 2024
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113. Regional impacts of warming on biodiversity and biomass in high latitude stream ecosystems across the Northern Hemisphere
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Jackson, Michelle C., Friberg, Nikolai, Moliner Cachazo, Luis, Clark, David R., Mutinova, Petra Thea, O’Gorman, Eoin J., Kordas, Rebecca L., Gallo, Bruno, Pichler, Doris E., Bespalaya, Yulia, Aksenova, Olga V., Milner, Alexander, Brooks, Stephen J., Dunn, Nicholas, Lee, K.W.K., Ólafsson, Jón S., Gíslason, Gísli M., Millan, Lucia, Bell, Thomas, Dumbrell, Alex J., and Woodward, Guy
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- 2024
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114. Author Correction: Shallow shotgun sequencing reduces technical variation in microbiome analysis
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La Reau, Alex J., Strom, Noah B., Filvaroff, Ellen, Mavrommatis, Konstantinos, Ward, Tonya L., and Knights, Dan
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- 2024
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115. Impact of vaccination on the association of COVID-19 with cardiovascular diseases: An OpenSAFELY cohort study
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Cezard, Genevieve I., Denholm, Rachel E., Knight, Rochelle, Wei, Yinghui, Teece, Lucy, Toms, Renin, Forbes, Harriet J., Walker, Alex J., Fisher, Louis, Massey, Jon, Hopcroft, Lisa E. M., Horne, Elsie M. F., Taylor, Kurt, Palmer, Tom, Arab, Marwa Al, Cuitun Coronado, Jose Ignacio, Ip, Samantha H. Y., Davy, Simon, Dillingham, Iain, Bacon, Sebastian, Mehrkar, Amir, Morton, Caroline E., Greaves, Felix, Hyams, Catherine, Davey Smith, George, Macleod, John, Chaturvedi, Nishi, Goldacre, Ben, Whiteley, William N., Wood, Angela M., Sterne, Jonathan A. C., and Walker, Venexia
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- 2024
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116. Mirror-image ligand discovery enabled by single-shot fast-flow synthesis of D-proteins
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Callahan, Alex J., Gandhesiri, Satish, Travaline, Tara L., Reja, Rahi M., Lozano Salazar, Lia, Hanna, Stephanie, Lee, Yen-Chun, Li, Kunhua, Tokareva, Olena S., Swiecicki, Jean-Marie, Loas, Andrei, Verdine, Gregory L., McGee, John H., and Pentelute, Bradley L.
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- 2024
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117. Synthesis and preclinical evaluation of [11C]EAI045 as a PET tracer for imaging tumors expressing mutated epidermal growth factor receptor
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Högnäsbacka, Antonia A., Poot, Alex J., Plisson, Christophe, Bergare, Jonas, Bonsall, David R., McCluskey, Stuart P., Wells, Lisa A., Kooijman, Esther, Schuit, Robert C., Verlaan, Mariska, Beaino, Wissam, van Dongen, Guus A. M. S., Vugts, Danielle J., Elmore, Charles S., Passchier, Jan, and Windhorst, Albert D.
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- 2024
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118. Microstructural integrity of the locus coeruleus and its tracts reflect noradrenergic degeneration in Alzheimer’s disease and Parkinson’s disease
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Lin, Chen-Pei, Frigerio, Irene, Bol, John G. J. M., Bouwman, Maud M. A., Wesseling, Alex J., Dahl, Martin J., Rozemuller, Annemieke J. M., van der Werf, Ysbrand D., Pouwels, Petra J. W., van de Berg, Wilma D. J., and Jonkman, Laura E.
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- 2024
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119. A fast ceramic mixed OH−/H+ ionic conductor for low temperature fuel cells
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Zou, Peimiao, Iuga, Dinu, Ling, Sanliang, Brown, Alex J., Chen, Shigang, Zhang, Mengfei, Han, Yisong, Fortes, A. Dominic, Howard, Christopher M., and Tao, Shanwen
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- 2024
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120. Large molecules from the cerebrospinal fluid enter the optic nerve but not the retina of mice
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Tong, Xiao J., Akdemir, Gokhan, Wadhwa, Meetu, Verkman, Alan S., and Smith, Alex J.
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- 2024
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121. State-Level LGBTQ + Policies and Experiences of Interpersonal Discrimination among Sexual and Gender Minority People
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Bates, Alex J., Kamp Dush, Claire M., and Manning, Wendy D.
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- 2024
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122. SARS-CoV-2 human challenge reveals biomarkers that discriminate early and late phases of respiratory viral infections
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Joshua Rosenheim, Rishi K. Gupta, Clare Thakker, Tiffeney Mann, Lucy C. K. Bell, Claire M. Broderick, Kieran Madon, Loukas Papargyris, Pete Dayananda, Andrew J. Kwok, James Greenan-Barrett, Helen R. Wagstaffe, Emily Conibear, Joe Fenn, Seran Hakki, Rik G. H. Lindeboom, Lisa M. Dratva, Briac Lemetais, Caroline M. Weight, Cristina Venturini, Myrsini Kaforou, Michael Levin, Mariya Kalinova, Alex J. Mann, Andrew Catchpole, Julian C. Knight, Marko Z. Nikolić, Sarah A. Teichmann, Ben Killingley, Wendy Barclay, Benjamin M. Chain, Ajit Lalvani, Robert S. Heyderman, Christopher Chiu, and Mahdad Noursadeghi
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Science - Abstract
Abstract Blood transcriptional biomarkers of acute viral infections typically reflect type 1 interferon (IFN) signalling, but it is not known whether there are biological differences in their regulation that can be leveraged for distinct translational applications. We use high frequency sampling in the SARS-CoV-2 human challenge model to show induction of IFN-stimulated gene (ISG) expression with different temporal and cellular profiles. MX1 gene expression correlates with a rapid and transient wave of ISG expression across all cell types, which may precede PCR detection of replicative infection. Another ISG, IFI27, shows a delayed but sustained response restricted to myeloid cells, attributable to gene and cell-specific epigenetic regulation. These findings are reproducible in experimental and naturally acquired infections with influenza, respiratory syncytial virus and rhinovirus. Blood MX1 expression is superior to IFI27 expression for diagnosis of early infection, as a correlate of viral load and for discrimination of virus culture positivity. Therefore, MX1 expression offers potential to stratify patients for antiviral therapy or infection control interventions. Blood IFI27 expression is superior to MX1 expression for diagnostic accuracy across the time course of symptomatic infection and thereby, offers higher diagnostic yield for respiratory virus infections that incur a delay between transmission and testing.
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- 2024
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123. Field surveys in rural Tanzania reveal key opportunities for targeted larval source management and species sanitation to control malaria in areas dominated by Anopheles funestus
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Betwel J. Msugupakulya, Nicolaus S. Mhumbira, Dawson T. Mziray, Masoud Kilalangongono, Mohamed Jumanne, Halfan S. Ngowo, Najat F. Kahamba, Alex J. Limwagu, Meleji L. Mollel, Prashanth Selvaraj, Anne L. Wilson, and Fredros O. Okumu
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Arctic medicine. Tropical medicine ,RC955-962 ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Larval source management (LSM) is re-emerging as a critical malaria intervention to address challenges associated with core vector control tools, such as insecticide-treated nets (ITNs), and to accelerate progress towards elimination. Presently, LSM is not widely used in rural settings and is instead more commonly applied in urban and arid settings. A systematic entomological assessment was conducted in rural communities of southeastern Tanzania, where insecticide-treated nets (ITNs) are widely used, to explore opportunities for deploying LSM to improve malaria control. Methods Aquatic habitat surveys were conducted in 2022 and 2023 to understand habitat usage by different mosquito vectors, covering five villages during the rainy season and seven villages during the dry season. Additionally, samples of adult mosquitoes were collected to assess the role of various Anopheles species in malaria transmission in the area, and to explore opportunities for species sanitation using targeted LSM. Results Adult mosquito surveys showed that in this area, the total entomological inoculation rates (EIR) for indoor collections were 20.1 and 6.5 infectious bites per person per year for outdoors. Anopheles funestus and Anopheles arabiensis were the only Anopheles vectors identified. Anopheles funestus was responsible for over 97.6% of the malaria transmission indoors and 95.4% outdoors. The concurrent larval surveys found that habitats with late instar An. arabiensis and An. funestus comprised only a small subset of 11.2%–16.5% of all water bodies in the rainy season, and 9.7%–15.2% in the dry season. In terms of size, these habitats covered 66.4%–68.2% of the total habitat areas in the wet season, reducing to 33.9%–40.6% in the dry season. From the rainy season to the dry season, the surface area of habitats occupied by An. arabiensis and An. funestus decreased by 92.0% to 97.5%, while the number of habitats occupied by An. arabiensis and An. funestus decreased by 38.0% to 57.3%. Anopheles funestus preferred large, permanent habitats with clear water and vegetation year-round, while An. arabiensis showed contrasting seasonal preferences, favouring sunlit still waters in the rainy season and larger, opaque habitats in the dry season. Conclusion These findings suggest that An. funestus, which is the dominant malaria vector in the area, mediating over 95% of malaria transmission, preferentially occupies only a small subset of uniquely identifiable aquatic habitats in both wet and dry seasons. This presents an opportunity to expand LSM in rural settings by carefully targeting An. funestus habitats, which might be effective and logistically feasible as a complementary approach alongside existing interventions. Further research should assess the impact of targeted LSM for species sanitation compared to blanket LSM.
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- 2024
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124. Genomic landscape of adult testicular germ cell tumours in the 100,000 Genomes Project
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Máire Ní Leathlobhair, Anna Frangou, Ben Kinnersley, Alex J. Cornish, Daniel Chubb, Eszter Lakatos, Prabhu Arumugam, Andreas J. Gruber, Philip Law, Avraam Tapinos, G. Maria Jakobsdottir, Iliana Peneva, Atef Sahli, Evie M. Smyth, Richard Y. Ball, Rushan Sylva, Ksenija Benes, Dan Stark, Robin J. Young, Alexander T. J. Lee, Vincent Wolverson, Richard S. Houlston, Alona Sosinsky, Andrew Protheroe, Matthew J. Murray, David C. Wedge, Clare Verrill, Testicular Cancer Genomics England Clinical Interpretation Partnership Consortium, and Genomics England Research Consortium
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Science - Abstract
Abstract Testicular germ cell tumours (TGCT), which comprise seminoma and non-seminoma subtypes, are the most common cancers in young men. In this study, we present a comprehensive whole genome sequencing analysis of adult TGCTs. Leveraging samples from participants recruited via the UK National Health Service and data from the Genomics England 100,000 Genomes Project, our results provide an extended description of genomic elements underlying TGCT pathogenesis. This catalogue offers a comprehensive, high-resolution map of copy number alterations, structural variation, and key global genome features, including mutational signatures and analysis of extrachromosomal DNA amplification. This study establishes correlations between genomic alterations and histological diversification, revealing divergent evolutionary trajectories among TGCT subtypes. By reconstructing the chronological order of driver events, we identify a subgroup of adult TGCTs undergoing relatively late whole genome duplication. Additionally, we present evidence that human leukocyte antigen loss is a more prevalent mechanism of immune disruption in seminomas. Collectively, our findings provide valuable insights into the developmental and immune modulatory processes implicated in TGCT pathogenesis and progression.
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- 2024
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125. Investigating the effects of mobile bottom fishing on benthic carbon processing and storage: a systematic review protocol
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Stacey L. Felgate, John Aldridge, Stefan G. Bolam, Sarah Breimann, Emil de Borger, Jolien Claes, Jochen Depestele, Graham Epstein, Clement Garcia, Natalie Hicks, Michel Kaiser, Jack H. Laverick, Gennadi Lessin, Finbarr G. O’Neill, Sarah Paradis, Ruth Parker, Ryan Pereira, Alex J. Poulton, Claire Powell, Craig Smeaton, Paul Snelgrove, Justin Tiano, Johan van der Molen, Sebastiaan van de Velde, and Marija Sciberras
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Benthic carbon ,Marine sediments ,Demersal trawling ,Resuspension ,Anthropogenic disturbance ,Environmental sciences ,GE1-350 - Abstract
Abstract Background Marine sediments represent one of the planet’s largest carbon stores. Bottom trawl fisheries constitute the most widespread physical disturbance to seabed habitats, which exert a large influence over the oceanic carbon dioxide (CO2) sink. Recent research has sparked concern that seabed disturbance from trawling can therefore turn marine sediments into a large source of CO2, but the calculations involved carry a high degree of uncertainty. This is primarily due to a lack of quantitative understanding of how trawling mixes and resuspends sediments, how it alters bioturbation, bioirrigation, and oxygenation rates, and how these processes translate into carbon fluxes into or out of sediments. Methods The primary question addressed by this review protocol is: how does mobile bottom fishing affect benthic carbon processing and storage? This question will be split into the following secondary questions: what is the effect of mobile bottom fishing on: (i) the amount and type of carbon found in benthic sediments; (ii) the magnitude and direction of benthic-pelagic carbon fluxes; (iii) the biogeochemical, biological, and physical parameters that control the fate of benthic carbon; and (iv) the biogeochemical, biological, and physical parameters that control the fate of resuspended carbon. Literature searches will be conducted in Web of Science, SCOPUS, PROQUEST, and a range of grey and specialist sources. An initial scoping search in Web of Science informed the final search string, which has been formulated according to Population Intervention Comparator Outcome (PICO) principles. Eligible studies must contain data concerning a change in a population of interest caused by mobile bottom fishing. Eligible study designs are Before and After, Control and Impact, and Gradient studies. Studies included at full-text screening will be critically appraised, and study findings will be extracted.Extracted data will be stored in an Excel spreadsheet. Results will be reported in narrative and quantitative syntheses using a variety of visual tools including forest plots. Meta-analysis will be conducted where sufficient data exists.
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- 2024
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126. Attachment anxiety mediates the relationship of need to belong and Fear of Missing Out (FoMO)
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Alex J. Holte, Andrew Nixon, and Jack Cooper
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Fear of Missing Out ,Need to Belong ,Attachment anxiety ,Depression ,Anxiety ,Psychology ,BF1-990 - Abstract
Abstract Fear of Missing Out (FoMO), the concern one is presently absent from a rewarding experience, is an emerging topic in the empirical literature. Though it has been demonstrated that numerous factors including anxiety and depression predict the extent an individual experiences FoMO, more research is needed to understand the inner mechanisms that work between these variables to result in FoMO. One such factor which may mediate the relations of anxiety and depression on FoMO is the need to belong (NTB). The goal of the current research aims to evaluate if NTB mediates the relationship of anxiety and depression with FoMO. In addition, we aimed to detect if attachment anxiety mediates the relationship of anxiety and FoMO. Lastly, the current study evaluated if attachment anxiety mediates the relationship between NTB and FoMO. An effective sample of 397 adults from the United States were recruited to complete multiple questionnaires. Structural Equation Modeling (SEM) was used to test a theoretical model depicting anxiety and depression as predictors of NTB, NTB predicting both attachment anxiety and FoMO, attachment anxiety predicting FoMO, and anxiety predicting attachment anxiety. Our results indicated that NTB was a strong predictor of FoMO, and this effect was mediated by attachment anxiety. Moreover, NTB mediated the influence of depression on FoMO, while attachment anxiety mediated the impact of anxiety on FoMO. The current research outlines that NTB is a key individual difference for why everyone does not uniformly experience FoMO. Limitations and suggestions for future research are outlined.
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- 2024
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127. Bias‐adjusted and downscaled humidex projections for heat preparedness and adaptation in Canada
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Kenneth Kin Cheung Chow, Housseyni Sankaré, Emilia P. Diaconescu, Trevor Q. Murdock, and Alex J. Cannon
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bias correction ,climate change impacts ,climate services ,CMIP6 ,extreme heat ,heat‐stress indices ,Meteorology. Climatology ,QC851-999 ,Geology ,QE1-996.5 - Abstract
Abstract To help with preparedness efforts of Canadian public health and safety systems for adaptation to climate change, the humidity index (humidex) and three threshold‐based humidex indices (annual number of days with humidex greater than 30, 35 and 40) were computed for a multi‐model ensemble of climate change projections, over Canada. The ensemble consists of one run from each 19 Coupled Model Intercomparison Project Phase 6 (CMIP6) global climate models and offers historical simulations starting in 1950 and future projections out to 2100 following Shared Socioeconomic Pathways (SSPs): SSP1‐2.6, SSP2‐4.5 and SSP5‐8.5. Each ensemble member was bias‐adjusted and statistically downscaled using the Multivariate bias correction—N‐dimensional probability density function transform (MBCn) with hourly data from ERA5‐Land as the target dataset and following a method proposed by Diaconescu et al. (2023; International Journal of Climatology, 43, 837) to calculate humidex from daily climate model outputs. This paper details the steps for data production including evaluation of the target historical gridded data and selection of downscaling method and presents some of the resulting humidex projections at the end of the century.
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- 2024
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128. Endosomal fusion of pH-dependent enveloped viruses requires ion channel TRPM7
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Catherine A. Doyle, Gregory W. Busey, Wesley H. Iobst, Volker Kiessling, Chloe Renken, Hansa Doppalapudi, Marta E. Stremska, Mohan C. Manjegowda, Mohd Arish, Weiming Wang, Shardul Naphade, Joel Kennedy, Louis-Marie Bloyet, Cassandra E. Thompson, Paul W. Rothlauf, Eric J. Stipes, Sean P. J. Whelan, Lukas K. Tamm, Alex J. B. Kreutzberger, Jie Sun, and Bimal N. Desai
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Science - Abstract
Abstract The majority of viruses classified as pandemic threats are enveloped viruses which enter the cell through receptor-mediated endocytosis and take advantage of endosomal acidification to activate their fusion machinery. Here we report that the endosomal fusion of low pH-requiring viruses is highly dependent on TRPM7, a widely expressed TRP channel that is located on the plasma membrane and in intracellular vesicles. Using several viral infection systems expressing the envelope glycoproteins of various viruses, we find that loss of TRPM7 protects cells from infection by Lassa, LCMV, Ebola, Influenza, MERS, SARS-CoV-1, and SARS-CoV-2. TRPM7 ion channel activity is intrinsically necessary to acidify virus-laden endosomes but is expendable for several other endosomal acidification pathways. We propose a model wherein TRPM7 ion channel activity provides a countercurrent of cations from endosomal lumen to cytosol necessary to sustain the pumping of protons into these virus-laden endosomes. This study demonstrates the possibility of developing a broad-spectrum, TRPM7-targeting antiviral drug to subvert the endosomal fusion of low pH-dependent enveloped viruses.
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- 2024
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129. What Are the Side Effects of School Turnaround? A Systematic Review
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Erica Harbatkin, Lam D. Pham, Christopher Redding, and Alex J. Moran
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In this systematic review, we examine research from 2009 to 2022 to identify and classify the unintended effects of turnaround in the United States. We develop a conceptual framework classifying three types of side effects--spillover effects, systemic side effects, and internal side effects--and differentiate these side effects from unintended negative intervention effects. We identify four broad categories of side effects within this framework based on the population they impact: communities, school systems, educators, and students. We find that the most prevalent side effects are related to educator experiences, staffing, community reaction, education governance, and the proliferation of external actors. We conclude by calling for future research to explicitly examine common side effects alongside the intended effects of turnaround.
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- 2024
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130. Causal Attribution Tendencies of Early Childhood Practitioners and the Efficacy of Attribution Retraining
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Alex J. Faucheux
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Early childhood practitioners frequently attempt to identify the cause of outcomes experienced by their learners. This is sometimes referred to as causal attribution. Causal attribution may be affected by prior success and failure of a learner, the amount of effort exerted by the learner, the ability level of the learner, and knowledge of any disability associated with the learner, all of which can be considered controllable or uncontrollable, stable or unstable, and internal or external (Weiner, 1986; Woodcock & Vialle, 2011). As practitioners attribute cause to outcomes, they start to develop attributional tendencies; these tendencies, along with the cues and public behaviors associated with these attributional tendencies, may have an impact on future outcomes of learners (Graham, 2020; Toevali & Kikas, 2016). It is important that practitioners develop adaptive attributional tendencies in which cause is attributed to controllable and unstable variables. One potential teaching approach for developing adaptive attributional tendencies is attribution retraining (Haynes et al, 2011; Wilson & Linville, 1982; 1985). This dissertation is a foundational dissertation that will examine multiple aspects of attribution, addressing several gaps in the extant literature including attributional tendencies of early childhood practitioners, attribution retraining for early childhood practitioners, and the thoughts and beliefs on attribution of early childhood practitioners. The study included a quantitative randomized control pre-test/post-test study that examined the efficacy of attribution retraining on a sample of early childhood practitioners and a qualitative thematic analysis that used semi-structured interviews to explore the thoughts and beliefs of early childhood practitioners regarding attribution of success and failure. Results from the quantitative portion of the study were inconclusive but did suggest that attribution retraining could potentially be effective in the future. Results from the qualitative portion of the study showed early childhood practitioners emphasize social-emotional learning and support, and the importance of family and family collaboration, when attributing cause to success and failure. This study established a foundation for future attribution and attribution retraining research with early childhood practitioners and parents of young children. Results are expanded on and discussed, then the implications for future research and practice are given. Future research should continue to explore attributional tendencies of early childhood practitioners and attribution retraining as a teaching tool for educating early childhood practitioners, as well as family members of young learners. Future research should include qualitative methodologies and mixed methodologies in order to capture more complete information about early childhood practitioners, and family members. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]
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- 2024
131. The Traumatic Aspect of Naming: Psychoanalysis and the Freirean Subject of (Class) Antagonism
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Alex J. Armonda
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Deploying a Lacanian conceptual framework, this article interrogates the psychoanalytic underpinnings of Paulo Freire's dialogical method of critical pedagogy. The paper advances the claim that the transformative efficacy of Freirean dialogue is rooted in its unique ability to confront and engage the repressed element of trauma, or what Lacan calls the "real." The author suggests that the locus of trauma stands as the elusive, yet central and constitutive axis around which Freire's dialogical engagement turns. Following psychoanalysis' attention to biography, the paper first examines how Freire's personal experience of exile informs his philosophical orientation to being, politics, and education. Turning to a specific classroom event Freire outlines in "Pedagogy of Hope," the paper then develops a new interpretation of Freire's idea of naming, and through Lacanian analysis, extends Freire's insight on the relationship between psyche, ideology, and social antagonism. Pushing the idea of class subjectivity in Freire beyond its familiar determinants (namely as an 'identity'), the paper resituates the notion of radical subjectivity in critical pedagogy as the effect of a traumatic loss or gap in the sociosymbolic order of being. The author argues that the 'naming event' in Freire is formally rooted in an encounter with this unconscious gap. To conclude, the paper offers critical educators some new points of departure for conceptualizing the transformative labor of problem-posing dialogue.
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- 2024
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132. Do Teacher Beliefs Mediate Leadership and Teacher Behaviors? Testing Teacher Self-Efficacy's Mediation Role between Leadership for Learning and Teacher Outcomes
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Joonkil Ahn and Alex J. Bowers
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Purpose: Leadership for learning emerged as an integrated leadership framework; however, attempts to establish an empirical measurement model have been limited. Critically, not much is known about how much teachers' beliefs (e.g. self-efficacy) can mediate leadership for learning impact on teacher behaviors. This study establishes a leadership for learning measurement model and examines whether teacher self-efficacy mediates the effect of leadership for learning tasks on teacher collaboration, instructional quality, intention to leave current schools and their confidence in equitable teaching practice. Design/methodology/approach: Drawing on the most recent 2018 Teaching and Learning International Survey (TALIS), the study employed a structural equation modeling mediation approach. Findings: Results suggested that teacher self-efficacy statistically significantly mediated 16 out of 20 of the relationships between leadership for learning task domains and teacher outcomes. Especially, in explaining the variance in instructional quality and teacher confidence in implementing equitable teaching practices, considerable proportions of the predictive power of leadership for learning tasks were accounted for (i.e. mediated) by teacher self-efficacy. Research limitations/implications: School-wide efforts to craft the school vision for learning must be coupled with enhancing teacher self-efficacy. Critically, leadership efforts may fall short of implementing equitable teaching practice and quality instruction without addressing teacher confidence in their ability in instruction, classroom management and student engagement. Originality/value: This study is the first of its kind to evidence teacher self-efficacy mediates leadership for learning practice impact on teacher behaviors.
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- 2024
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133. Methods of a Sixteenth-Century Actor-Director: Lope de Rueda’s Performance-Based Approach to Adaptation
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Thomas, Alex J. H.
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- 2024
134. How to Catch an AI Liar: Lie Detection in Black-Box LLMs by Asking Unrelated Questions
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Pacchiardi, Lorenzo, Chan, Alex J., Mindermann, Sören, Moscovitz, Ilan, Pan, Alexa Y., Gal, Yarin, Evans, Owain, and Brauner, Jan
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Computer Science - Computation and Language ,Computer Science - Artificial Intelligence ,Computer Science - Machine Learning - Abstract
Large language models (LLMs) can "lie", which we define as outputting false statements despite "knowing" the truth in a demonstrable sense. LLMs might "lie", for example, when instructed to output misinformation. Here, we develop a simple lie detector that requires neither access to the LLM's activations (black-box) nor ground-truth knowledge of the fact in question. The detector works by asking a predefined set of unrelated follow-up questions after a suspected lie, and feeding the LLM's yes/no answers into a logistic regression classifier. Despite its simplicity, this lie detector is highly accurate and surprisingly general. When trained on examples from a single setting -- prompting GPT-3.5 to lie about factual questions -- the detector generalises out-of-distribution to (1) other LLM architectures, (2) LLMs fine-tuned to lie, (3) sycophantic lies, and (4) lies emerging in real-life scenarios such as sales. These results indicate that LLMs have distinctive lie-related behavioural patterns, consistent across architectures and contexts, which could enable general-purpose lie detection.
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- 2023
135. GA-NIFS: Early-stage feedback in a heavily obscured AGN at $z=4.76$
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Parlanti, Eleonora, Carniani, Stefano, Übler, Hannah, Venturi, Giacomo, Circosta, Chiara, D'Eugenio, Francesco, Arribas, Santiago, Bunker, Andrew J., Charlot, Stéphane, Lützgendorf, Nora, Maiolino, Roberto, Perna, Michele, Del Pino, Bruno Rodríguez, Willott, Chris J., Böker, Torsten, Cameron, Alex J., Chevallard, Jacopo, Cresci, Giovanni, Jones, Gareth C., Kumari, Nimisha, Lamperti, Isabella, and Scholtz, Jan
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Dust-obscured galaxies are thought to represent an early evolutionary phase of massive galaxies in which the active galactic nucleus (AGN) is still deeply buried in significant amounts of dusty material and its emission is strongly suppressed. The unprecedented sensitivity of the James Webb Space Telescope enables us for the first time to detect the rest-frame optical emission of heavily obscured AGN and unveil the properties of the hidden accreting super-massive black holes (BHs). In this work, we present the JWST/NIRSpec IFS data of ALESS073.1, a massive, dusty, star-forming galaxy at $z = 4.76$ hosting an AGN at its center. The detection of a very broad $H_\alpha$ emission associated with the Broad Line Region (BLR) confirms the presence of a BH ($\log(M_{BH}/M_\odot)>8.7$) accreting at less than 15\% of its Eddington limit and classifies the target as a Type 1 AGN. The rest-frame optical emission lines also reveal a fast ionized gas outflow marginally resolved in the galaxy center. The high sensitivity of NIRSpec allows us to perform the kinematic analysis of the narrow H$\alpha$ component which indicates that the warm ionized gas velocity field is consistent with disk rotation. We also find that, in the innermost nuclear regions ($< 1.5$ kpc), the intrinsic velocity dispersion of the disk reaches $\sim 150$ km/s, $\sim 2-3$ times higher than the velocity dispersion inferred from the [CII] 158$\mu$m line tracing mostly cold gas. Since, at large radii, the velocity dispersion of the warm and cold gas are comparable, we conclude that the outflows are injecting turbulence in the warm ionized gas in the central region, but they are not sufficiently powerful to disrupt the dense gas and quench star formation. These findings support the scenario that dust-obscured galaxies represent the evolutionary stage preceding the unobscured quasar when all gas and dust are removed from the host., Comment: 16 pages, 12 figures, accepted in A&A
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- 2023
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136. Ultraviolet-ozone treatment: an effective method for fine-tuning optical and electrical properties of suspended and substrate-supported MoS2
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Sarcan, Fahrettin, Armstrong, Alex J., Bostan, Yusuf K., Kus, Esra, McKenna, Keith, Erol, Ayse, and Wang, Yue
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Condensed Matter - Materials Science ,Physics - Applied Physics ,Physics - Optics - Abstract
Ultraviolet-ozone (UV-O3) treatment is a simple but effective technique for surface cleaning, surface sterilization, doping and oxidation, and is applicable to a wide range of materials. In this study, we investigated how UV-O3 treatment affects the optical and electrical properties of molybdenum disulfide (MoS2), with and without the presence of a dielectric substrate. We performed detailed photoluminescence (PL) measurements on 1-7 layers of MoS2 with up to 8 minutes of UV-O3 exposure. Density functional theory (DFT) calculations were carried out to provide insight into oxygen-MoS2 interaction mechanisms. Our results showed that the influence of UV-O3 treatment on PL depends on whether the substrate is present, as well as the number of layers. The PL intensity of the substrate-supported MoS2 decreased dramatically with the increase of UV-O3 treatment time and was fully quenched after 8 mins. However, the PL intensity of the suspended flakes was less affected. 4 minutes of UV-O3 exposure was found to be optimal to produce p-type MoS2, while maintaining above 80% of the PL intensity and the emission wavelength, compared to pristine flakes (intrinsically n-type). Our electrical measurements showed that UV-O3 treatment for more than 6 minutes not only caused a reduction in the electron density but also deteriorated the hole-dominated transport. It is revealed that the substrate plays a critical role in the manipulation of the electrical and optical properties of MoS2, which should be considered in future device fabrication and applications.
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- 2023
137. Ionised gas kinematics and dynamical masses of $z\gtrsim6$ galaxies from JADES/NIRSpec high-resolution spectroscopy
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de Graaff, Anna, Rix, Hans-Walter, Carniani, Stefano, Suess, Katherine A., Charlot, Stéphane, Curtis-Lake, Emma, Arribas, Santiago, Baker, William M., Boyett, Kristan, Bunker, Andrew J., Cameron, Alex J., Chevallard, Jacopo, Curti, Mirko, Eisenstein, Daniel J., Franx, Marijn, Hainline, Kevin, Hausen, Ryan, Ji, Zhiyuan, Johnson, Benjamin D., Jones, Gareth C., Maiolino, Roberto, Maseda, Michael V., Nelson, Erica, Parlanti, Eleonora, Rawle, Tim, Robertson, Brant, Tacchella, Sandro, Übler, Hannah, Williams, Christina C., Willmer, Christopher N. A., and Willott, Chris
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Astrophysics - Astrophysics of Galaxies - Abstract
We explore the kinematic gas properties of six $5.5
1$ thus far. The cold gas masses implied by the observed star formation rates are $\sim 10\times$ larger than the stellar masses. We find that their ionised gas is spatially resolved by JWST, with evidence for broadened lines and spatial velocity gradients. Using a simple thin-disc model, we fit these data with a novel forward modelling software that accounts for the complex geometry, point spread function, and pixellation of the NIRSpec instrument. We find the sample to include both rotation- and dispersion-dominated structures, as we detect velocity gradients of $v(r_{\rm e})\approx100-150\,{\rm km\,s^{-1}}$, and find velocity dispersions of $\sigma_0\approx 30-70\,{\rm km\,s^{-1}}$ that are comparable to those at cosmic noon. The dynamical masses implied by these models ($M_{\rm dyn}\sim10^{9-10}\,{\rm M_\odot}$) are larger than the stellar masses by up to a factor 40, and larger than the total baryonic mass (gas + stars) by a factor of $\sim 3$. Qualitatively, this result is robust even if the observed velocity gradients reflect ongoing mergers rather than rotating discs. Unless the observed emission line kinematics is dominated by outflows, this implies that the centres of these galaxies are dark-matter dominated or that star formation is $3\times$ less efficient, leading to higher inferred gas masses., Comment: Accepted for publication in A&A. Software for JWST/NIRSpec MSA modelling (slit losses, 1D LSFs and 2D model fitting) publicly available at https://github.com/annadeg/jwst-msafit - Published
- 2023
138. Advancing Intra-operative Precision: Dynamic Data-Driven Non-Rigid Registration for Enhanced Brain Tumor Resection in Image-Guided Neurosurgery
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Chrisochoides, Nikos, Fedorov, Andriy, Drakopoulos, Fotis, Kot, Andriy, Liu, Yixun, Foteinos, Panos, Angelopoulos, Angelos, Clatz, Olivier, Ayache, Nicholas, Black, Peter M., Golby, Alex J., and Kikinis, Ron
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Electrical Engineering and Systems Science - Image and Video Processing - Abstract
During neurosurgery, medical images of the brain are used to locate tumors and critical structures, but brain tissue shifts make pre-operative images unreliable for accurate removal of tumors. Intra-operative imaging can track these deformations but is not a substitute for pre-operative data. To address this, we use Dynamic Data-Driven Non-Rigid Registration (NRR), a complex and time-consuming image processing operation that adjusts the pre-operative image data to account for intra-operative brain shift. Our review explores a specific NRR method for registering brain MRI during image-guided neurosurgery and examines various strategies for improving the accuracy and speed of the NRR method. We demonstrate that our implementation enables NRR results to be delivered within clinical time constraints while leveraging Distributed Computing and Machine Learning to enhance registration accuracy by identifying optimal parameters for the NRR method. Additionally, we highlight challenges associated with its use in the operating room.
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- 2023
139. A rotating white dwarf shows different compositions on its opposite faces
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Caiazzo, Ilaria, Burdge, Kevin B., Tremblay, Pier-Emmanuel, Fuller, James, Ferrario, Lilia, Gaensicke, Boris T., Hermes, J. J., Heyl, Jeremy, Kawka, Adela, Kulkarni, S. R., Marsh, Thomas R., Mroz, Przemek, Prince, Thomas A., Richer, Harvey B., Rodriguez, Antonio C., van Roestel, Jan, Vanderbosch, Zachary P., Vennes, Stephane, Wickramasinghe, Dayal, Dhillon, Vikram S., Littlefair, Stuart P., Munday, James, Pelisoli, Ingrid, Perley, Daniel, Bellm, Eric C., Breedt, Elme, Brown, Alex J., Dekany, Richard, Drake, Andrew, Dyer, Martin J., Graham, Matthew J., Green, Matthew J., Laher, Russ R., Kerry, Paul, Parsons, Steven G., Riddle, Reed L., Rusholme, Ben, and Sahman, Dave I.
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Earth and Planetary Astrophysics - Abstract
White dwarfs, the extremely dense remnants left behind by most stars after their death, are characterised by a mass comparable to that of the Sun compressed into the size of an Earth-like planet. In the resulting strong gravity, heavy elements sink toward the centre and the upper layer of the atmosphere contains only the lightest element present, usually hydrogen or helium. Several mechanisms compete with gravitational settling to change a white dwarf's surface composition as it cools, and the fraction of white dwarfs with helium atmospheres is known to increase by a factor ~2.5 below a temperature of about 30,000 K; therefore, some white dwarfs that appear to have hydrogen-dominated atmospheres above 30,000 K are bound to transition to be helium-dominated as they cool below it. Here we report observations of ZTF J203349.8+322901.1, a transitioning white dwarf with two faces: one side of its atmosphere is dominated by hydrogen and the other one by helium. This peculiar nature is likely caused by the presence of a small magnetic field, which creates an inhomogeneity in temperature, pressure or mixing strength over the surface. ZTF J203349.8+322901.1 might be the most extreme member of a class of magnetic, transitioning white dwarfs -- together with GD 323, a white dwarf that shows similar but much more subtle variations. This new class could help shed light on the physical mechanisms behind white dwarf spectral evolution., Comment: 45 pages, 11 figures
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- 2023
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140. DUVET Survey: Mapping Outflows in the Metal-Poor Starburst Mrk 1486
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McPherson, Daniel K., Fisher, Deanne B., Nielsen, Nikole M., Kacprzak, Glenn G., Chu, Bronwyn Reichardt, Cameron, Alex J., Bolatto, Alberto D., Chisholm, John, Fielding, Drummond B., Berg, Danielle, Herrera-Camus, Rodrigo, Li, Miao, Vaught, Ryan J. Rickards, and Sandstrom, Karin
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Astrophysics - Astrophysics of Galaxies - Abstract
We present a method to characterize star-formation driven outflows from edge-on galaxies and apply this method to the metal-poor starburst galaxy, Mrk 1486. Our method uses the distribution of emission line flux (from H$\beta$ and [OIII] 5007) to identify the location of the outflow and measure the extent above the disk, the opening angle, and the transverse kinematics. We show that this simple technique recovers a similar distribution of the outflow without requiring complex modelling of line-splitting or multi-Gaussian components, and is therefore applicable to lower spectral resolution data. In Mrk 1486 we observe an asymmetric outflow in both the location of the peak flux and total flux from each lobe. We estimate an opening angle of $17-37^{\circ}$ depending on the method and assumptions adopted. Within the minor axis outflows, we estimate a total mass outflow rate of $\sim2.5$ M$_{\odot}$ yr$^{-1}$, which corresponds to a mass loading factor of $\eta=0.7$. We observe a non-negligible amount of flux from ionized gas outflowing along the edge of the disk (perpendicular to the biconical components), with a mass outflow rate $\sim0.9$ M$_{\odot}$ yr$^{-1}$. Our results are intended to demonstrate a method that can be applied to high-throughput, low spectral resolution observations, such as narrow band filters or low spectral resolution IFS that may be more able to recover the faint emission from outflows., Comment: 12 Pages, 6 Figures
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- 2023
141. The Perturbed Full Two-Body Problem: Application to Post-DART Didymos
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Meyer, Alex J., Agrusa, Harrison F., Richardson, Derek C., Daly, R. Terik, Fuentes-Muñoz, Oscar, Hirabayashi, Masatoshi, Michel, Patrick, Merrill, Colby C., Nakano, Ryota, Cheng, Andrew F., Barbee, Brent, Barnouin, Olivier S., Chesley, Steven R., Ernst, Carolyn M., Gkolias, Ioannis, Moskovitz, Nicholas A., Naidu, Shantanu P., Pravec, Petr, Scheirich, Petr, Thomas, Cristina A., Tsiganis, Kleomenis, and Scheeres, Daniel J.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
With the successful impact of the NASA DART spacecraft in the Didymos-Dimorphos binary asteroid system, we provide an initial analysis of the post-impact perturbed binary asteroid dynamics. To compare our simulation results with observations, we introduce a set of "observable elements" calculated using only the physical separation of the binary asteroid, rather than traditional Keplerian elements. Using numerical methods that treat the fully spin-orbit-coupled dynamics, we estimate the system's mass and the impact-induced changes in orbital velocity, semimajor axis, and eccentricity. We find that the changes to the mutual orbit depend strongly on the separation distance between Didymos and Dimorphos at the time of impact. If Dimorphos enters a tumbling state after the impact, this may be observable through changes in the system's eccentricity and orbit period. We also find that any DART-induced reshaping of Dimorphos would generally reduce the required change in orbital velocity to achieve the measured post-impact orbit period and will be assessed by the ESA Hera mission in 2027., Comment: Accepted for publication in PSJ
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- 2023
142. Long distance optical conveyor-belt transport of ultracold $^{133}$Cs and $^{87}$Rb atoms
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Matthies, Alex J., Mortlock, Jonathan M., McArd, Lewis A., Raghuram, Adarsh P., Innes, Andrew D., Gregory, Philip D., Bromley, Sarah L., and Cornish, Simon L.
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Condensed Matter - Quantum Gases ,Physics - Atomic Physics - Abstract
We report on the transport of ultracold cesium and rubidium atoms over $37.2\,$cm in under $25\,$ms using an optical conveyor belt formed by two counter-propagating beams with a controllable frequency difference that generate a movable optical lattice. By carefully selecting the waists and focus positions, we are able to use two static Gaussian beams for the transport, avoiding the need for a Bessel beam or vari-focus lenses. We characterize the transport efficiency for both species, including a comparison of different transport trajectories, gaining insight into the loss mechanisms and finding the minimum jerk trajectory to be optimum. Using the optimized parameters, we are able to transport up to $7 \times 10^6$ cesium or rubidium atoms with an efficiency up to $75\,$%. To demonstrate the viability of our transport scheme for experiments employing quantum gas microscopy, we produce Bose-Einstein condensates of either species after transport and present measurements of the simultaneous transport of both species., Comment: 15 pages, 10 figures
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- 2023
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143. Corrected Density Functional Theory and the Random Phase Approximation: Improved Accuracy at Little Extra Cost
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Graf, Daniel and Thom, Alex J. W.
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Physics - Chemical Physics - Abstract
We recently introduced an efficient methodology to perform density-corrected Hartree-Fock density functional theory (DC(HF)-DFT) calculations and an extension to it we called "corrected" HF DFT (C(HF)-DFT). In this work, we take a further step and combine C(HF)-DFT, augmented with a straightforward orbital energy correction, with the random phase approximation (RPA). We refer to the resulting methodology as corrected HF RPA (C(HF)-RPA). We evaluate the proposed methodology across various RPA methods: direct RPA (dRPA), RPA with an approximate exchange kernel (RPA-AXK), and RPA with second-order screened exchange (RPA-SOSEX). C(HF)-dRPA, in particular, demonstrates very promising performance; for RPA with exchange methods we find over-corrections for certain chemical problems.
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- 2023
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144. Co-Design of Multijunction Photoelectrochemical Devices for Unassisted CO2 Reduction to Multicarbon Products
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Wei, William J, King, Alex J, Bui, Justin C, Weber, Adam Z, and Bell, Alexis T
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Engineering ,Chemical Sciences ,Physical Chemistry ,Affordable and Clean Energy ,photoelectrochemistry ,CO2 reduction ,design ,electrochemical engineering ,semiconductors ,multijunction ,energy conversion - photovoltaics ,Macromolecular and Materials Chemistry ,Physical Chemistry (incl. Structural) ,Materials Engineering ,Energy ,Physical chemistry ,Materials engineering - Abstract
Highlights Photoelectrochemical CO2 reduction to multicarbon products with high efficiency. Co-design of photoelectrochemical CO2 reduction devices for multicarbon product generation. Optimal semiconductor bandgaps for high multicarbon product selectivity. Limitations in multicarbon product generation from photoelectrochemical CO2 reduction. Optimizing photoelectrochemical CO2 reduction systems for multicarbon product generation.
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- 2023
145. Outcomes of Urethroplasty for Synchronous Anterior Urethral Stricture Utilizing the Trauma and Urologic Reconstruction Network of Surgeons Length, Segment and Etiology Anterior Urethral Stricture Classification System
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Jamil, Marcus L, Hamsa, Alexandra, Grove, Shawn, Cho, Eric Y, Alsikafi, Nejd F, Breyer, Benjamin N, Broghammer, Joshua A, Buckley, Jill C, Elliott, Sean P, Erickson, Bradley A, Myers, Jeremy B, Peterson, Andrew C, Rourke, Keith F, Voelzke, Bryan B, Zhao, Lee C, and Vanni, Alex J
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Biomedical and Clinical Sciences ,Clinical Sciences ,Urologic Diseases ,Clinical Research ,Humans ,Urethral Stricture ,Constriction ,Pathologic ,Urethra ,Causality ,Surgeons ,Urology & Nephrology ,Clinical sciences - Abstract
ObjectiveTo describe the characteristics, management, and functional outcomes of patients with synchronous urethral stricture disease (SUSD) utilizing a multi-institutional cohort.MethodsData were collected and assessed from a prospectively maintained, multi-institutional database. Patients who underwent anterior urethroplasty for urethral stricture disease (USD) were included and stratified by the presence or absence of SUSD. USD location and etiology were classified according to the Trauma and Urologic Reconstruction Network of Surgeons Length, Segment and Etiology Anterior Urethral Stricture Classification System. Anterior urethroplasty techniques were recorded for both strictures. Functional failure was compared between groups.ResultsOne thousand nine hundred eighty-three patients were identified, of whom, 137/1983 (6.9%) had SUSD. The mean primary stricture length for patients with SUSD was 3.5 and 2.6 cm for the secondary stricture. Twelve anterior urethroplasty technique combinations were utilized in treating the 27 different combinations of SUSD. Functional failure was noted in 18/137 (13.1%) patients with SUSD vs 192/1846 (10.4%) patients with solitary USD, P = .3. SUSD was not associated with increased odds of functional failure. S classifications: S1b, P = .003, S2a, P = .001, S2b, P = .01 and S2c, P = .02 and E classifications: E3a, P = .004 and E6, P = .03, were associated with increased odds of functional failure.ConclusionRepair of SUSD in a single setting does not increase the risk of functional failure compared to patients with solitary USD. Increasing S classification, S1b through S2c and E classifications E3a and E6 were associated with increased functional failure. This reinforces the importance of the Trauma and Urologic Reconstruction Network of Surgeons Length, Segment and Etiology Anterior Urethral Stricture Classification System as a necessary tool in large-scale multi-institutional analysis when assessing highly heterogenous patient populations.
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- 2023
146. AUTHOR REPLY
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Schlaepfer, Charles H, Flynn, Kevin J, Vanni, Alex J, Breyer, Benjamin N, and Erickson, Bradley A
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Biomedical and Clinical Sciences ,Clinical Sciences ,Urology & Nephrology ,Clinical sciences - Published
- 2023
147. Clinical Validation of an Adult-acquired Buried Penis Classification System Based on Standardized Evaluation of the Penis, Abdomen, and Scrotum
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Schlaepfer, Charles H, Flynn, Kevin J, Alsikafi, Nejd F, Breyer, Benjamin N, Broghammer, Joshua A, Buckley, Jill C, Elliott, Sean P, Myers, Jeremy B, Vanni, Alex J, Voelzke, Bryan B, Zhao, Lee C, and Erickson, Bradley A
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Biomedical and Clinical Sciences ,Clinical Sciences ,Urologic Diseases ,Clinical Research ,Good Health and Well Being ,Urology & Nephrology ,Clinical sciences - Abstract
ObjectiveTo clinically validate a previously developed adult-acquired buried penis (AABP) classification system that is based on a standardized preoperative physical examination that subtypes patients by their penile skin/escutcheon complex (P), abdominal pannus (A), and scrotal skin (S).MethodsThe Trauma and Urologic Reconstruction Network of Surgeons (TURNS) database was used to create an AABP cohort. Patients were retrospectively classified using the previously described PAS classification system. The frequency of subtypes, surgical methods utilized for AABP repair, and correlations between PAS classification and surgery subtypes were analyzed.ResultsThe final cohort consisted of 101 patients from 10 institutions. Interrater reliability between two reviewers was excellent (κ = 0.95). The most common subtypes were P2c (contributory escutcheon+insufficient penile skin; 27%) and P2a (contributory escutcheon+sufficient penile skin; 21%) for penile subtypes, A0 (no pannus; 41%) and A1 (noncontributory pannus; 39%) for abdominal subtypes, and S0 (normal scrotal skin with preserved scrotal sulcus; 71%) for scrotal subtypes. AABP repair procedures included escutcheonectomy (n = 59, 55%), scrotoplasty (n = 51, 48%), split-thickness skin grafting (n = 50, 47%), penile skin excision (n = 47, 44%) and panniculectomy (n = 7, 7%). P, A, and S subtypes were strongly associated with specific AABP surgical techniques.ConclusionThe PAS classification schema adequately describes AABP heterogeneity, is reproducible among observers, and correlates well with AABP surgery types. Future work will focus on how PAS subtypes affect both surgical and patient-centered outcomes.
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- 2023
148. Network Connectivity Alterations across the MAPT Mutation Clinical Spectrum
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Zhang, Liwen, Flagan, Taru M, Häkkinen, Suvi, Chu, Stephanie A, Brown, Jesse A, Lee, Alex J, Pasquini, Lorenzo, Mandelli, Maria Luisa, Gorno‐Tempini, Maria Luisa, Sturm, Virginia E, Yokoyama, Jennifer S, Appleby, Brian S, Cobigo, Yann, Dickerson, Bradford C, Domoto‐Reilly, Kimiko, Geschwind, Daniel H, Ghoshal, Nupur, Graff‐Radford, Neill R, Grossman, Murray, Hsiung, Ging‐Yuek Robin, Huey, Edward D, Kantarci, Kejal, Lago, Argentina Lario, Litvan, Irene, Mackenzie, Ian R, Mendez, Mario F, Onyike, Chiadi U, Ramos, Eliana Marisa, Roberson, Erik D, Tartaglia, Maria Carmela, Toga, Arthur W, Weintraub, Sandra, Wszolek, Zbigniew K, Forsberg, Leah K, Heuer, Hilary W, Boeve, Bradley F, Boxer, Adam L, Rosen, Howard J, Miller, Bruce L, Seeley, William W, Lee, Suzee E, and Consortia, the ARTFL LEFFTDS ALLFTD
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Biomedical and Clinical Sciences ,Neurosciences ,Clinical Sciences ,Dementia ,Brain Disorders ,Alzheimer's Disease Related Dementias (ADRD) ,Clinical Research ,Frontotemporal Dementia (FTD) ,Mental Health ,Alzheimer's Disease ,Rare Diseases ,Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD) ,Aging ,Acquired Cognitive Impairment ,Neurodegenerative ,Biomedical Imaging ,2.1 Biological and endogenous factors ,Aetiology ,Neurological ,Humans ,Cross-Sectional Studies ,tau Proteins ,Brain ,Mutation ,Gray Matter ,Magnetic Resonance Imaging ,Frontotemporal Dementia ,Biomarkers ,ARTFL/LEFFTDS/ALLFTD Consortia ,Neurology & Neurosurgery ,Clinical sciences - Abstract
ObjectiveMicrotubule-associated protein tau (MAPT) mutations cause frontotemporal lobar degeneration, and novel biomarkers are urgently needed for early disease detection. We used task-free functional magnetic resonance imaging (fMRI) mapping, a promising biomarker, to analyze network connectivity in symptomatic and presymptomatic MAPT mutation carriers.MethodsWe compared cross-sectional fMRI data between 17 symptomatic and 39 presymptomatic carriers and 81 controls with (1) seed-based analyses to examine connectivity within networks associated with the 4 most common MAPT-associated clinical syndromes (ie, salience, corticobasal syndrome, progressive supranuclear palsy syndrome, and default mode networks) and (2) whole-brain connectivity analyses. We applied K-means clustering to explore connectivity heterogeneity in presymptomatic carriers at baseline. Neuropsychological measures, plasma neurofilament light chain, and gray matter volume were compared at baseline and longitudinally between the presymptomatic subgroups defined by their baseline whole-brain connectivity profiles.ResultsSymptomatic and presymptomatic carriers had connectivity disruptions within MAPT-syndromic networks. Compared to controls, presymptomatic carriers showed regions of connectivity alterations with age. Two presymptomatic subgroups were identified by clustering analysis, exhibiting predominantly either whole-brain hypoconnectivity or hyperconnectivity at baseline. At baseline, these two presymptomatic subgroups did not differ in neuropsychological measures, although the hypoconnectivity subgroup had greater plasma neurofilament light chain levels than controls. Longitudinally, both subgroups showed visual memory decline (vs controls), yet the subgroup with baseline hypoconnectivity also had worsening verbal memory and neuropsychiatric symptoms, and extensive bilateral mesial temporal gray matter decline.InterpretationNetwork connectivity alterations arise as early as the presymptomatic phase. Future studies will determine whether presymptomatic carriers' baseline connectivity profiles predict symptomatic conversion. ANN NEUROL 2023;94:632-646.
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- 2023
149. A high‐resolution model of the grapevine leaf morphospace predicts synthetic leaves
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Daniel H. Chitwood, Efrain Torres‐Lomas, Ebi S. Hadi, Wolfgang L. G. Peterson, Mirjam F. Fischer, Sydney E. Rogers, Chuan He, Michael G. F. Acierno, Shintaro Azumaya, Seth Wayne Benjamin, Devendra Prasad Chalise, Ellice E. Chess, Alex J. Engelsma, Qiuyi Fu, Jirapa Jaikham, Bridget M. Knight, Nikita S. Kodjak, Adazsofia Lengyel, Brenda L. Muñoz, Justin T. Patterson, Sundara I. Rincon, Francis L. Schumann, Yujie Shi, Charlie C. Smith, Mallory K. St. Clair, Carly S. Sweeney, Patrick Whitaker, James Wu, and Luis Diaz‐Garcia
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ampelography ,grapevine ,leaf development ,leaf shape ,morphospace ,Vitis ,Environmental sciences ,GE1-350 ,Botany ,QK1-989 - Abstract
Societal Impact Statement Grapevine leaves are emblematic of the strong visual associations people make with plants. Leaf shape is immediately recognizable at a glance, and therefore, this is used to distinguish grape varieties. In an era of computationally enabled machine learning‐derived representations of reality, we can revisit how we view and use the shapes and forms that plants display to understand our relationship with them. Using computational approaches combined with time‐honored methods, we can predict theoretical leaves that are possible, enabling us to understand the genetics, development, and environmental responses of plants in new ways. Summary Grapevine leaves are a model morphometric system. Sampling over 10,000 leaves using dozens of landmarks, the genetic, developmental, and environmental basis of leaf shape has been studied and a morphospace for the genus Vitis predicted. Yet, these representations of leaf shape fail to capture the exquisite features of leaves at high resolution. We measure the shapes of 139 grapevine leaves using 1672 pseudo‐landmarks derived from 90 homologous landmarks with Procrustean approaches. From hand traces of the vasculature and blade, we have derived a method to automatically detect landmarks and place pseudo‐landmarks that results in a high‐resolution representation of grapevine leaf shape. Using polynomial models, we create continuous representations of leaf development in 10 Vitis spp. We visualize a high‐resolution morphospace in which genetic and developmental sources of leaf shape variance are orthogonal to each other. Using classifiers, Vitis vinifera, Vitis spp., rootstock and dissected leaf varieties as well as developmental stages are accurately predicted. Theoretical eigenleaf representations sampled from across the morphospace that we call synthetic leaves can be classified using models. By predicting a high‐resolution morphospace and delimiting the boundaries of leaf shapes that can plausibly be produced within the genus Vitis, we can sample synthetic leaves with realistic qualities. From an ampelographic perspective, larger numbers of leaves sampled at lower resolution can be projected onto this high‐resolution space, or, synthetic leaves can be used to increase the robustness and accuracy of machine learning classifiers.
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- 2025
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150. Prairie dog towns increase grassland bird diversity at the landscape scale/Las poblaciones de perritos de las praderas aumentan la diversidad de aves de praderas a escala de paisaje
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Haun, Alex J., Dreelin, R. Andrew, and Boyce, Andy J.
- Subjects
Ecosystems -- Research -- Protection and preservation ,Biological diversity -- Protection and preservation -- Research ,Wildlife conservation -- Research -- Protection and preservation ,Indicators (Biology) -- Research -- Protection and preservation ,Biological sciences - Abstract
Prairie dogs (Cynomys sp.) are recognized as keystone species because their colonies provide habitat heterogeneity and are inhabited by specialized plant and animal communities. While many studies have demonstrated the unique ecological properties of prairie dog colonies and their effects on local grassland bird communities, few have examined how their presence influences bird diversity at a landscape scale. We collected species diversity data across 192 points within 64 80-ha sampling cells. With 11 of those 64 cells containing an active prairie dog town, we tested if the presence of black-tailed prairie dog (Cynomys ludovicianus) colonies would result in higher landscape-scale avian biodiversity in a mixed-grass prairie and sagebrush steppe ecosystem in north-central Montana. Utilizing permutational multivariate analysis of variance, we observed significant dissimilarities between avian communities with and without prairie dog colonics, and colony presence explained a moderate proportion of variance in avian diversity. Indicator species analysis found 5 species significantly associated with colony cells: Homed Lark (Eremophila alpestris), Marbled Godwit (Limosa fedoa), Brewer's Blackbird (Euphagus cyanocephalus), Killdeer (Charadrius vociferus), and Burrowing Owl (Athene cunicularia). These findings suggest prairie dogs play an important role in maintaining high avian biodiversity at a landscape scale within grassland ecosystems. Further, our results emphasize the importance of incorporating prairie dogs into conservation efforts for grassland birds. Received 14 August 2023. Accepted 8 March 2024. Key words: conservation, Great Plains, keystone species, Montana, songbirds. (Spanish)--Los perritos de las praderas (Cynomys sp.) se reconocen como especies clave ya que sus colonias brindan heterogeneidad al habitat y son habitadas por comunidades animales y vegetales especializadas. Mientras muchos estudios han demostrado las propiedades unicas de las colonias de perritos de las praderas y sus efectos en comunidades locales de aves de praderas, pocos han examinado como su presencia influye en la diversidad de aves a escala del paisaje. Colectamos datos de diversidad de especie en 192 puntos con celdas de muestreo de 64-80 ha. Con 11 de esas 64 celdas que contenian poblaciones activas de perritos de las praderas, analizamos si la presencia de colonias de perrito de la pradera de cola negra (Cynomys ludovicianus) resultan en una mayor biodiversidad de aves a escala del paisaje en una pradera de pastos mixtos y ecosistema de estepa de artemisa en la parte central del norte de Montana. Utilizando analisis de varianza multivariado permutacional, observamos disimilitudes significativas entre comunidades de aves con y sin colonias de perritos de la pradera y la presencia de colonias explico en proporcion moderada la varianza de la diversidad aviar. Analisis de especies indicadoras encontro 5 especies significativamente asociadas con celdas de colonias: alondra Eremophila alpeslris, aguja Limosa fedoa, tordo Euphagus cyanocephalus, chorlito Charadrius vociferus, y el tecolote Athene cunicularia. Estos hallazgos sugieren que los perritos de la pradera juegan un papel importante en mantener una alta biodiversidad de aves a escala de paisaje dentro de ecosistemas de pradera. Ademas, nuestros resultados enfatizan en la importancia de incorporar a los perritos de pradera en esfuerzos de conservacion de aves de pradera. Palabras clave: aves canoras, conservacion, especies clave, Great Plains, Montana., Grassland bird communities coevolved with frequent and large-scale ecological disturbances such as grazing and fire that create a mosaic of habitat within grasslands (Knopf 1996, Smith and Lomolino 2004, Fuhlendorf [...]
- Published
- 2024
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