11,264 results on '"Harvey, A. J."'
Search Results
202. Dimensionality reduction methods for molecular simulations
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Doerr, Stefan, Ariz-Extreme, Igor, Harvey, Matthew J., and De Fabritiis, Gianni
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Statistics - Machine Learning ,Computer Science - Learning ,Quantitative Biology - Biomolecules - Abstract
Molecular simulations produce very high-dimensional data-sets with millions of data points. As analysis methods are often unable to cope with so many dimensions, it is common to use dimensionality reduction and clustering methods to reach a reduced representation of the data. Yet these methods often fail to capture the most important features necessary for the construction of a Markov model. Here we demonstrate the results of various dimensionality reduction methods on two simulation data-sets, one of protein folding and another of protein-ligand binding. The methods tested include a k-means clustering variant, a non-linear auto encoder, principal component analysis and tICA. The dimension-reduced data is then used to estimate the implied timescales of the slowest process by a Markov state model analysis to assess the quality of the projection. The projected dimensions learned from the data are visualized to demonstrate which conformations the various methods choose to represent the molecular process., Comment: 11 pages, 10 figures
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- 2017
203. First results from the DEAP-3600 dark matter search with argon at SNOLAB
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Collaboration, DEAP-3600, Amaudruz, P. -A., Baldwin, M., Batygov, M., Beltran, B., Bina, C. E., Bishop, D., Bonatt, J., Boorman, G., Boulay, M. G., Broerman, B., Bromwich, T., Bueno, J. F., Burghardt, P. M., Butcher, A., Cai, B., Chan, S., Chen, M., Chouinard, R., Cleveland, B. T., Cranshaw, D., Dering, K., DiGioseffo, J., Dittmeier, S., Duncan, F. A., Dunford, M., Erlandson, A., Fatemighomi, N., Florian, S., Flower, A., Ford, R. J., Gagnon, R., Giampa, P., Golovko, V. V., Gorel, P., Gornea, R., Grace, E., Graham, K., Gulyev, E., Hakobyan, R., Hall, A., Hallin, A. L., Hamstra, M., Harvey, P. J., Hearns, C., Jillings, C. J., Kamaev, O., Kemp, A., Kuźniak, M., Langrock, S., La Zia, F., Lehnert, B., Lidgard, J. J., Lim, C., Lindner, T., Linn, Y., Liu, S., Majewski, P., Mathew, R., McDonald, A. B., McElroy, T., McGinn, T., McLaughlin, J. B., Mead, S., Mehdiyev, R., Mielnichuk, C., Monroe, J., Muir, A., Nadeau, P., Nantais, C., Ng, C., Noble, A. J., O'Dwyer, E., Ohlmann, C., Olchanski, K., Olsen, K. S., Ouellet, C., Pasuthip, P., Peeters, S. J. M., Pollmann, T. R., Rand, E. T., Rau, W., Rethmeier, C., Retière, F., Seeburn, N., Shaw, B., Singhrao, K., Skensved, P., Smith, B., Smith, N. J. T., Sonley, T., Soukup, J., Stainforth, R., Stone, C., Strickland, V., Sur, B., Tang, J., Taylor, J., Veloce, L., Vázquez-Jáuregui, E., Walding, J., Ward, M., Westerdale, S., Woolsey, E., and Zielinski, J.
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Astrophysics - Cosmology and Nongalactic Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics ,High Energy Physics - Experiment ,High Energy Physics - Phenomenology - Abstract
This paper reports the first results of a direct dark matter search with the DEAP-3600 single-phase liquid argon (LAr) detector. The experiment was performed 2 km underground at SNOLAB (Sudbury, Canada) utilizing a large target mass, with the LAr target contained in a spherical acrylic vessel of 3600 kg capacity. The LAr is viewed by an array of PMTs, which would register scintillation light produced by rare nuclear recoil signals induced by dark matter particle scattering. An analysis of 4.44 live days (fiducial exposure of 9.87 tonne-days) of data taken with the nearly full detector during the initial filling phase demonstrates the detector performance and the best electronic recoil rejection using pulse-shape discrimination in argon, with leakage $<1.2\times 10^{-7}$ (90% C.L.) between 16 and 33 keV$_{ee}$. No candidate signal events are observed, which results in the leading limit on WIMP-nucleon spin-independent cross section on argon, $<1.2\times 10^{-44}$ cm$^2$ for a 100 GeV/c$^2$ WIMP mass (90% C.L.)., Comment: Accepted for publication in Physical Review Letters
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- 2017
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204. In-situ characterization of the Hamamatsu R5912-HQE photomultiplier tubes used in the DEAP-3600 experiment
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DEAP Collaboration, Amaudruz, P. -A., Batygov, M., Beltran, B., Bina, C. E., Bishop, D., Bonatt, J., Boorman, G., Boulay, M. G., Broerman, B., Bromwich, T., Bueno, J. F., Butcher, A., Cai, B., Chan, S., Chen, M., Chouinard, R., Churchwell, S., Cleveland, B. T., Cranshaw, D., Dering, K., Dittmeier, S., Duncan, F. A., Dunford, M., Erlandson, A., Fatemighomi, N., Ford, R. J., Gagnon, R., Giampa, P., Golovko, V. V., Gorel, P., Gornea, R., Grace, E., Graham, K., Grant, D. R., Gulyev, E., Hall, A., Hallin, A. L., Hamstra, M., Harvey, P. J., Hearns, C., Jillings, C. J., Kamaev, O., Kemp, A., Kuźniak, M., Langrock, S., La Zia, F., Lehnert, B., Li, O., Lidgard, J. J., Liimatainen, P., Lim, C., Lindner, T., Linn, Y., Liu, S., Mathew, R., McDonald, A. B., McElroy, T., McFarlane, K., McLaughlin, J., Mead, S., Mehdiyev, R., Mielnichuk, C., Monroe, J., Muir, A., Nadeau, P., Nantais, C., Ng, C., Noble, A. J., O'Dwyer, E., Ohlmann, C., Olchanski, K., Olsen, K. S., Ouellet, C., Pasuthip, P., Peeters, S. J. M., Pollmann, T. R., Rand, E. T., Rau, W., Rethmeier, C., Retiére, F., Seeburn, N., Shaw, B., Singhrao, K., Skensved, P., Smith, B., Smith, N. J. T., Sonley, T., Stainforth, R., Stone, C., Strickland, V., Sur, B., Tang, J., Taylor, J., Veloce, L., Vázquez-Jáuregui, E., Walding, J., Ward, M., Westerdale, S., White, R., Woolsey, E., and Zielinski, J.
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Physics - Instrumentation and Detectors - Abstract
The Hamamatsu R5912-HQE photomultiplier-tube (PMT) is a novel high-quantum efficiency PMT. It is currently used in the DEAP-3600 dark matter detector and is of significant interest for future dark matter and neutrino experiments where high signal yields are needed. We report on the methods developed for in-situ characterization and monitoring of DEAP's 255 R5912-HQE PMTs. This includes a detailed discussion of typical measured single-photoelectron charge distributions, correlated noise (afterpulsing), dark noise, double, and late pulsing characteristics. The characterization is performed during the detector commissioning phase using laser light injected through a light diffusing sphere and during normal detector operation using LED light injected through optical fibres.
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- 2017
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205. The search for neutron-antineutron oscillations at the Sudbury Neutrino Observatory
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SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Duncan, F. A., Dunford, M., Earle, E. D., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kruger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., OrebiGann, G. D., Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Simpson, J. J., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Wright, A., Yeh, M., Zhang, F., and Zuber, K.
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High Energy Physics - Experiment ,Nuclear Experiment ,Physics - Instrumentation and Detectors - Abstract
Tests on $B-L$ symmetry breaking models are important probes to search for new physics. One proposed model with $\Delta(B-L)=2$ involves the oscillations of a neutron to an antineutron. In this paper a new limit on this process is derived for the data acquired from all three operational phases of the Sudbury Neutrino Observatory experiment. The search was concentrated in oscillations occurring within the deuteron, and 23 events are observed against a background expectation of 30.5 events. These translate to a lower limit on the nuclear lifetime of $1.48\times 10^{31}$ years at 90% confidence level (CL) when no restriction is placed on the signal likelihood space (unbounded). Alternatively, a lower limit on the nuclear lifetime was found to be $1.18\times 10^{31}$ years at 90% CL when the signal was forced into a positive likelihood space (bounded). Values for the free oscillation time derived from various models are also provided in this article. This is the first search for neutron-antineutron oscillation with the deuteron as a target., Comment: 14 pages, 8 figures
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- 2017
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206. Overview of ADNI MRI.
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Jack, Clifford R., Arani, Arvin, Borowski, Bret J., Cash, Dave M., Crawford, Karen, Das, Sandhitsu R., DeCarli, Charles, Fletcher, Evan, Fox, Nick C., Gunter, Jeffrey L., Ittyerah, Ranjit, Harvey, Danielle J., Jahanshad, Neda, Maillard, Pauline, Malone, Ian B., Nir, Talia M., Reid, Robert I., Reyes, Denise A., Schwarz, Christopher G., and Senjem, Matthew L.
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The magnetic resonance imaging (MRI) Core has been operating since Alzheimer's Disease Neuroimaging Initiative's (ADNI) inception, providing 20 years of data including reliable, multi‐platform standardized protocols, carefully curated image data, and quantitative measures provided by expert investigators. The overarching purposes of the MRI Core include: (1) optimizing and standardizing MRI acquisition methods, which have been adopted by many multicenter studies and trials worldwide and (2) providing curated images and numeric summary values from relevant MRI sequences/contrasts to the scientific community. Over time, ADNI MRI has become increasingly complex. To remain technically current, the ADNI MRI protocol has changed substantially over the past two decades. The ADNI 4 protocol contains nine different imaging types (e.g., three dimensional [3D] T1‐weighted and fluid‐attenuated inversion recovery [FLAIR]). Our view is that the ADNI MRI data are a greatly underutilized resource. The purpose of this paper is to educate the scientific community on ADNI MRI methods and content to promote greater awareness, accessibility, and use. Highlights: The MRI Core provides multi‐platform standardized protocols, carefully curated image data, and quantitative analysis by expert groups.The ADNI MRI protocol has undergone major changes over the past two decades to remain technically current.As of April 25, 2024, the following numbers of image series are available: 17,141 3D T1w; 6877 FLAIR; 3140 T2/PD; 6623 GRE; 3237 dMRI; 2846 ASL; 2968 TF‐fMRI; and 2861 HighResHippo (see Table 1 for abbreviations).As of April 25, 2024, the following numbers of quantitative analyses are available: FreeSurfer 10,997; BSI 6120; tensor based morphometry (TBM) and TBM‐SYN 12,019; WMH 9944; dMRI 1913; ASL 925; TF‐fMRI NFQ 2992; and medial temporal subregion volumes 2726 (see Table 4 for abbreviations).ADNI MRI is an underutilized resource that could be more useful to the research community. [ABSTRACT FROM AUTHOR]
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- 2024
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207. Standardized statistical framework for comparison of biomarkers: Techniques from ADNI.
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Harvey, Danielle J., Tosun, Duygu, Jack, Clifford R., Weiner, Michael, and Beckett, Laurel A.
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INTRODUCTION: Well‐chosen biomarkers have the potential to increase the efficiency of clinical trials and drug discovery and should show good precision as well as clinical validity. METHODS: We suggest measures that operationalize these criteria and describe a general approach that can be used for inference‐based comparisons of biomarker performance. The methods are applied to measures obtained from structural magnetic resonance imaging (MRI) from individuals with mild dementia (n = 70) or mild cognitive impairment (MCI; n = 303) enrolled in the Alzheimer's Disease Neuroimaging Initiative. RESULTS: Ventricular volume and hippocampal volume showed the best precision in detecting change over time in both individuals with MCI and with dementia. Differences in clinical validity varied by group. DISCUSSION: The methodology presented provides a standardized framework for comparison of biomarkers across modalities and across different methods used to generate similar measures and will help in the search for the most promising biomarkers. Highlights: A framework for comparison of biomarkers on pre‐defined criteria is presented.Criteria for comparison include precision in capturing change and clinical validity.Ventricular volume has high precision in change for both dementia and mild cognitive impairment (MCI) trials.Imaging measures' performance in clinical validity varies more for dementia than for MCI. [ABSTRACT FROM AUTHOR]
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- 2024
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208. Contributions of the ADNI Biostatistics Core.
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Beckett, Laurel A., Saito, Naomi, Donohue, Michael C., and Harvey, Danielle J.
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The goal of the Biostatistics Core of the Alzheimer's Disease Neuroimaging Initiative (ADNI) has been to ensure that sound study designs and statistical methods are used to meet the overall goals of ADNI. We have supported the creation of a well‐validated and well‐curated longitudinal database of clinical and biomarker information on ADNI participants and helped to make this accessible and usable for researchers. We have developed a statistical methodology for characterizing the trajectories of clinical and biomarker change for ADNI participants across the spectrum from cognitively normal to dementia, including multivariate patterns and evidence for heterogeneity in cognitive aging. We have applied these methods and adapted them to improve clinical trial design. ADNI‐4 will offer us a chance to help extend these efforts to a more diverse cohort with an even richer panel of biomarker data to support better knowledge of and treatment for Alzheimer's disease and related dementias. Highlights: The Alzheimer's Disease Neuroimaging Initiative (ADNI) Biostatistics Core provides study design and analytic support to ADNI investigators.Core members develop and apply novel statistical methodology to work with ADNI data and support clinical trial design.The Core contributes to the standardization, validation, and harmonization of biomarker data.The Core serves as a resource to the wider research community to address questions related to the data and study as a whole. [ABSTRACT FROM AUTHOR]
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- 2024
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209. Unity fluorescent carbene–gold(I)–acetylide complexes with two-photon absorption and energy-efficient blue FOLEDs.
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Brannan, Alexander C., Cho, Hwan-Hee, Daniel, Jonathan, Harvey, Amelia J., Smith, Charles T., Le Phuoc, Nguyen, Linnolahti, Mikko, Blanchard-Desce, Mireille, Greenham, Neil C., and Romanov, Alexander S.
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Two fluorescent organometallic "carbene–gold(I)–acetylide" (CMAc) complexes based on bicyclic alkyl(amino) carbene (BIC), 4-ethynyl-2,1,3-benzothiadiazole (Au1) and 4,7-diethynyl-2,1,3-benzothiadiazole (Au2) have been synthesized and characterized. Compounds Au1 and Au2 exhibit blue to yellow fluorescence with up to unity fluorescence quantum yields and radiative rates exceeding 10
8 s−1 . The dipolar Au1 complex exhibits a low two photon absorption cross-section (2PA σ2 ) of 0.8 GM, whereas the quadrupolar Au2 complex shows a high 2PA σ2 value of 90 GM. A fluorescent CMAc organic light emitting diode (OLED) emits blue electroluminescence with up to 4.7% external quantum efficiency. [ABSTRACT FROM AUTHOR]- Published
- 2024
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210. Pulmonary embolism response teams. A description of the first 36‐month Australian experience.
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Roy, Bapti, Cho, Jin‐Gun, Baker, Luke, Thomas, Liza, Curnow, Jennifer, Harvey, John J., Geenty, Paul, Banerjee, Ashoke, Lai, Kevin, Vicaretti, Mauro, Erksine, Odette, Li, Jane, Alasady, Rafid, Wong, Vanessa, Tai, Jian E., Thirunavukarasu, Caitlin, Haque, Imran, and Chien, Jimmy
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HEMORRHAGE complications ,CARDIOVASCULAR disease related mortality ,LUNG radiography ,PULMONARY embolism ,RISK assessment ,MEDICAL information storage & retrieval systems ,T-test (Statistics) ,HUMAN services programs ,DISEASE management ,SCIENTIFIC observation ,BLOOD vessels ,COMPUTED tomography ,TREATMENT effectiveness ,RETROSPECTIVE studies ,DISEASES ,ELECTRONIC health records ,MEDICAL records ,ACQUISITION of data ,COMPARATIVE studies ,DATA analysis software ,THROMBECTOMY ,HEALTH care teams ,ECHOCARDIOGRAPHY ,EVALUATION ,DISEASE risk factors - Abstract
Background: High/intermediate‐risk pulmonary embolism (PE) confers increased risk of cardiovascular morbidity and mortality. International guidelines recommend the formation of a PE response team (PERT) for PE management because of the complexity of risk stratification and emerging treatment options. However, there are currently no available Australian data regarding outcomes of PE managed through a PERT. Aims: To analyse the clinical and outcome data of patients from an Australian centre with high/intermediate‐risk PE requiring PERT‐guided management. Methods: We performed a retrospective observational study of 75 consecutive patients with high/intermediate‐risk PE who had PERT involvement, between August 2018 and July 2021. We recorded clinical and interventional data at the time of PERT and assessed patient outcomes up to 30 days from PERT initiation. We used unpaired t tests to compare right to left ventricular (RV/LV) ratios by computed tomography criteria or transthoracic echocardiogram (TTE) at baseline and after interventions. Results: Data were available for 74 patients. Initial computed tomography pulmonary angiography RV/LV ratio was increased at 1.65 ± 0.5 and decreased to 1.30 ± 0.29 following PERT‐guided interventions (P < 0.001). TTE RV/LV ratio also decreased following PERT‐guided management (1.09 ± 0.19 vs 0.93 ± 0.17; P < 0.001). 20% of patients had any bleeding complication, but two‐thirds were mild, not requiring intervention. All‐cause mortality was 6.8%, and all occurred within the first 7 days of admission. Conclusion: The PERT model is feasible in a large Australian centre in managing complex and time‐critical PE. Our data demonstrate outcomes comparable with existing published international PERT data. However, successful implementation at other Australian institutions may require adequate centre‐specific resource availability and the presence of multispeciality input. [ABSTRACT FROM AUTHOR]
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- 2024
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211. Fire Ecology of Rocky Mountain Forests
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Hood, Sharon M., Harvey, Brian J., Fornwalt, Paula J., Naficy, Cameron E., Hansen, Winslow D., Davis, Kimberley T., Battaglia, Mike A., Stevens-Rumann, Camille S., Saab, Victoria Ann, Tomé, Margarida, Series Editor, Seifert, Thomas, Series Editor, Kurttila, Mikko, Series Editor, Greenberg, Cathryn H., editor, and Collins, Beverly, editor
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- 2021
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212. Application of microfluidic systems in modelling impacts of environmental structure on stress-sensing by individual microbial cells
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Harvey, Harry J., Chubynsky, Mykyta V., Sprittles, James E., Shor, Leslie M., Mooney, Sacha J., Wildman, Ricky D., and Avery, Simon V.
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- 2022
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213. Evaluation of sample pooling using the SAMBA II SARS-CoV-2 test
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Heaney, Katy, Ritchie, Allyson V., Henry, Rowan, Harvey, Adam J., Curran, Martin D., Allain, Jean-Pierre, and Lee, Helen H.
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- 2022
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214. How Do I Compare Thee? An Evidence-Based Approach to the Presentation of Class Comparison Information to Students Using Dashboard
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Harvey, Annelie J. and Keyes, Helen
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Learning Dashboards display analytics pertaining to student performance and attainment, often alongside scores for the class cohort average. Little research has considered the effects of this social comparison information on students' well-being, motivation, and engagement. The current study presented participants with hypothetical data that simulated a student performing above, below, or at the class average before measuring self-esteem, persistence on an impossible anagram task, and willingness to engage with study support services. Our results showed that where upward social comparisons were induced (exposure to Dashboard data displaying engagement and attainment below the class average), students reported lower self-esteem than participants presented with above average vignette data. Interestingly, this effect was not moderated by the grade profile of students and no effects on persistence or willingness to engage with study support were observed. We conclude that upward social comparisons in Dashboard data can have negative consequences for students' self-esteem.
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- 2020
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215. The Influence of Alcohol and Weapon Presence on Eyewitness Memory and Confidence
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Harvey, Alistair J., Shrimpton, Braden, Azzopardi, Zoe, O'Grady, Katherine, Hicks, Emily, Hirst, Emily, and Atkinson-Cox, Keenan
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In this quasi-experimental field study, bar drinkers (0.00-0.23% blood alcohol content) viewed a photographic sequence in which a male took a laptop from a helpdesk assistant, either on loan or at gunpoint. Following a brief retention period, participants answered 20 multiple-choice questions about the male, his actions, and details of the scene, then attempted to identify him from a simultaneous target-present or target-absent line-up. Alcohol was associated with a reduction in correct identifications and an increase in false identifications. Surprisingly, the presence of a weapon in the scene enhanced identification accuracy, though wider scene memory was not influenced by alcohol or the weapon. Findings offer some support for the view that alcohol restricts face encoding, perhaps through the narrowing of attention to salient external features (e.g., hair). We also suggest that curiosity about mock-crime perpetrators may produce weapon focus reversals, although the factors that might elicit such curiosity remain unclear.
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- 2020
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216. The Unrealised Potential of School Grounds in Britain to Monitor and Improve Biodiversity
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Harvey, Deborah J., Gange, Alan C., and Harvey, Hannah
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In this study, we aimed to understand the state of school grounds across Britain and how they are being used to support biodiversity conservation and pupils' environmental education. We carried out an opt-in survey of schools across Britain, asking staff to report on habitats in their grounds and how they are used for learning. Our results showed that schools are under-using their grounds to provide habitats and environmental education. Realizing the potential of these spaces could be a vital tool in the future success of species diversity. This could be done through changes to the national curricula and teacher training.
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- 2020
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217. Southern Hemisphere continental temperature responses to major volcanic eruptions since 1883 in CMIP5 models
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Harvey, P. J. and Grab, S. W.
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- 2022
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218. Production of a structurally validated cyclotide in rice suspension cells is enabled by a supporting biosynthetic enzyme
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Qu, Haiou, Jackson, Mark A., Yap, Kuok, Harvey, Peta J., Gilding, Edward K., and Craik, David J.
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- 2020
219. Formation and fragmentation of doubly and triply charged ions in the negative ion spectra of neutral N-glycans from viral and other glycoproteins
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Harvey, David J., Struwe, Weston B., Behrens, Anna-Janina, Vasiljevic, Snezana, and Crispin, Max
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- 2021
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220. Identification of N-glycans with GalNAc-containing antennae from recombinant HIV trimers by ion mobility and negative ion fragmentation
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Harvey, David J., Behrens, Anna-Janina, Crispin, Max, and Struwe, Weston B.
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- 2021
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221. Acute alcohol intoxication and the cocktail party problem: do “mocktails” help or hinder?
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Harvey, Alistair J. and Beaman, C. Philip
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- 2021
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222. Bifenthrin causes transcriptomic alterations in mTOR and ryanodine receptor-dependent signaling and delayed hyperactivity in developing zebrafish (Danio rerio)
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Frank, Daniel F, Miller, Galen W, Harvey, Danielle J, Brander, Susanne M, Geist, Juergen, Connon, Richard E, and Lein, Pamela J
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Environmental Sciences ,Pollution and Contamination ,Neurosciences ,1.1 Normal biological development and functioning ,2.1 Biological and endogenous factors ,Mental health ,Animals ,Hypersensitivity ,Delayed ,Locomotion ,Pyrethrins ,Ryanodine Receptor Calcium Release Channel ,Signal Transduction ,TOR Serine-Threonine Kinases ,Transcriptome ,Water Pollutants ,Chemical ,Zebrafish ,Ca2+-dependent signaling ,Fish behavior ,Insecticide ,Neurodevelopment ,Pesticide ,Pyrethroid ,Chemical Sciences ,Biological Sciences ,Toxicology ,Biological sciences ,Chemical sciences ,Environmental sciences - Abstract
Over the last few decades, the pyrethroid insecticide bifenthrin has been increasingly employed for pest control in urban and agricultural areas, putting humans and wildlife at increased risk of exposure. Exposures to nanomolar (nM) concentrations of bifenthrin have recently been reported to alter calcium oscillations in rodent neurons. Neuronal calcium oscillations are influenced by ryanodine receptor (RyR) activity, which modulates calcium-dependent signaling cascades, including the mechanistic target of rapamycin (mTOR) signaling pathway. RyR activity and mTOR signaling play critical roles in regulating neurodevelopmental processes. However, whether environmentally relevant levels of bifenthrin alter RyR or mTOR signaling pathways to influence neurodevelopment has not been addressed. Therefore, our main objectives in this study were to examine the transcriptomic responses of genes involved in RyR and mTOR signaling pathways in zebrafish (Danio rerio) exposed to low (ng/L) concentrations of bifenthrin, and to assess the potential functional consequences by measuring locomotor responses to external stimuli. Wildtype zebrafish were exposed for 1, 3 and 5 days to 1, 10 and 50 ng/L bifenthrin, followed by a 14 d recovery period. Bifenthrin elicited significant concentration-dependent transcriptional responses in the majority of genes examined in both signaling cascades, and at all time points examined during the acute exposure period (1, 3, and 5 days post fertilization; dpf), and at the post recovery assessment time point (19 dpf). Changes in locomotor behavior were not evident during the acute exposure period, but were observed at 19 dpf, with main effects (increased locomotor behavior) detected in fish exposed developmentally to bifenthrin at 1 or 10 ng/L, but not 50 ng/L. These findings illustrate significant influences of developmental exposures to low (ng/L) concentrations of bifenthrin on neurodevelopmental processes in zebrafish.
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- 2018
223. A magnetic resonance imaging study of early brain injury in a rat model of acute DFP intoxication
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Hobson, Brad A, Rowland, Douglas J, Supasai, Suangsuda, Harvey, Danielle J, Lein, Pamela J, and Garbow, Joel R
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Pharmacology and Pharmaceutical Sciences ,Biomedical and Clinical Sciences ,Neurosciences ,Neurodegenerative ,Biomedical Imaging ,Brain Disorders ,Epilepsy ,Aetiology ,2.1 Biological and endogenous factors ,Neurological ,Animals ,Brain Injuries ,Disease Models ,Animal ,Isoflurophate ,Magnetic Resonance Imaging ,Male ,Rats ,Sprague-Dawley ,Status Epilepticus ,In vivo imaging ,Neuropathology ,Organophosphate ,Seizure ,T2-weighted MRI ,Toxicology ,Pharmacology and pharmaceutical sciences - Abstract
Current treatments for seizures induced by organophosphates do not protect sufficiently against progressive neurodegeneration or delayed cognitive impairment. Developing more effective therapeutic approaches has been challenging because the pathogenesis of these delayed consequences is poorly defined. Using magnetic resonance imaging (MRI), we previously reported brain lesions that persist for months in a rat model of acute intoxication with the OP, diisopropylfluorophosphate (DFP). However, the early spatiotemporal progression of these lesions remains unknown. To address this data gap, we used in vivo MRI to longitudinally monitor brain lesions during the first 3 d following acute DFP intoxication. Adult male Sprague Dawley rats acutely intoxicated with DFP (4mg/kg, sc) were MR imaged at 6, 12, 18, 24, 48, 72h post-DFP, and their brains then taken for correlative histology to assess neurodegeneration using FluoroJade C (FJC) staining. Acute DFP intoxication elicited moderate-to-severe seizure activity. T2-weighted (T2w) anatomic imaging revealed prominent lesions within the thalamus, piriform cortex, cerebral cortex, hippocampus, corpus striatum, and substantia nigra that corresponded to neurodegeneration, evident as bands of FJC positive cells. Semi-quantitative assessment of lesion severity demonstrated significant regional variation in the onset and progression of injury, and suggested that lesion severity may be modulated by isoflurane anesthesia. These results imply that the timing of therapeutic intervention for attenuating brain injury following OP intoxication may be regionally dependent, and that longitudinal assessment of OP-induced damage by MRI may be a powerful tool for assessing therapeutic response.
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- 2018
224. Effects of Yoga on Attention, Impulsivity, and Hyperactivity in Preschool-Aged Children with Attention-Deficit Hyperactivity Disorder Symptoms
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Cohen, Samantha CL, Harvey, Danielle J, Shields, Rebecca H, Shields, Grant S, Rashedi, Roxanne N, Tancredi, Daniel J, Angkustsiri, Kathleen, Hansen, Robin L, and Schweitzer, Julie B
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Biomedical and Clinical Sciences ,Health Sciences ,Psychology ,Mental Health ,Clinical Research ,Pediatric ,Brain Disorders ,Behavioral and Social Science ,Attention Deficit Hyperactivity Disorder (ADHD) ,Complementary and Integrative Health ,Clinical Trials and Supportive Activities ,Mental health ,Attention Deficit Disorder with Hyperactivity ,Child ,Preschool ,Female ,Follow-Up Studies ,Humans ,Impulsive Behavior ,Male ,Neuropsychological Tests ,Treatment Outcome ,Yoga ,ADHD ,yoga ,preschool ,Medical and Health Sciences ,Psychology and Cognitive Sciences ,Developmental & Child Psychology ,Biomedical and clinical sciences ,Health sciences - Abstract
ObjectiveBehavioral therapies are first-line for preschoolers with attention-deficit hyperactivity disorder (ADHD). Studies support yoga for school-aged children with ADHD; this study evaluated yoga in preschoolers on parent- and teacher-rated attention/challenging behaviors, attentional control (Kinder Test of Attentional Performance [KiTAP]), and heart rate variability (HRV).MethodsThis randomized waitlist-controlled trial tested a 6-week yoga intervention in preschoolers with ≥4 ADHD symptoms on the ADHD Rating Scale-IV Preschool Version. Group 1 (n = 12) practiced yoga first; Group 2 (n = 11) practiced yoga second. We collected data at 4 time points: baseline, T1 (6 weeks), T2 (12 weeks), and follow-up (3 months after T2).ResultsAt baseline, there were no significant differences between groups. At T1, Group 1 had faster reaction times on the KiTAP go/no-go task (p = 0.01, 95% confidence interval [CI], -371.1 to -59.1, d = -1.7), fewer distractibility errors of omission (p = 0.009, 95% CI, -14.2 to -2.3, d = -1.5), and more commission errors (p = 0.02, 95% CI, 1.4-14.8, d = 1.3) than Group 2. Children in Group 1 with more severe symptoms at baseline showed improvement at T1 versus control on parent-rated Strengths and Difficulties Questionnaire hyperactivity inattention (β = -2.1, p = 0.04, 95% CI, -4.0 to -0.1) and inattention on the ADHD Rating Scale (β = -4.4, p = 0.02, 95% CI, -7.9 to -0.9). HRV measures did not differ between groups.ConclusionYoga was associated with modest improvements on an objective measure of attention (KiTAP) and selective improvements on parent ratings.
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- 2018
225. Narrative Language Sampling in Typical Development: Implications for Clinical Trials
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Channell, Marie Moore, Loveall, Susan J, Conners, Frances A, Harvey, Danielle J, and Abbeduto, Leonard
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Clinical Research ,Pediatric ,Clinical Trials and Supportive Activities ,Adolescent ,Aging ,Child ,Child Development ,Child Language ,Child ,Preschool ,Clinical Trials as Topic ,Cross-Sectional Studies ,Female ,Humans ,Language Tests ,Linguistics ,Male ,Narration ,Semantics ,Sex Characteristics ,Young Adult ,Clinical Sciences ,Cognitive Sciences ,Speech-Language Pathology & Audiology - Abstract
PurposeThis study examined cross-sectional age-related trajectories of expressive language variables (syntactic complexity, lexical diversity, unintelligibility, dysfluency, and talkativeness) derived from a narrative language sampling procedure.MethodNarrative samples were analyzed from 103 typically developing individuals, ages 4-21 years.ResultsResults showed that this procedure was effective for the entire age range, with participants producing an utterance on virtually every page of the wordless picture books used to prompt the narrative. Importantly, the cross-sectional trajectories for syntactic complexity and lexical diversity showed age-related increases through the age of 18 years, although measures of other dimensions of language showed different relationships with age.ConclusionsThese data inform developmental work and document the extent to which the narrative procedure can be used to characterize expressive language over a wide age range. This procedure has been proposed as an outcome measure for clinical trials and interventions involving individuals with intellectual and developmental disabilities. The present data document the developmental levels for which the procedure and metrics derived are appropriate.
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- 2018
226. Midlatitude atmospheric circulation responses under 1.5 and 2.0 ∘C warming and implications for regional impacts
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Li, Camille, Michel, Clio, Graff, Lise Seland, Bethke, Ingo, Zappa, Giuseppe, Bracegirdle, Thomas J, Fischer, Erich, Harvey, Ben J, Iversen, Trond, King, Martin P, Krishnan, Harinarayan, Lierhammer, Ludwig, Mitchell, Daniel, Scinocca, John, Shiogama, Hideo, Stone, Dáithí A, and Wettstein, Justin J
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Earth Sciences ,Oceanography ,Atmospheric Sciences ,Climate Action ,Physical Geography and Environmental Geoscience ,Climate change science ,Geoinformatics - Abstract
This study investigates the global response of the midlatitude atmospheric circulation to 1.5 and 2.0g°C of warming using the HAPPI (Half a degree Additional warming, Prognosis and Projected Impacts) ensemble, with a focus on the winter season. Characterising and understanding this response is critical for accurately assessing the near-term regional impacts of climate change and the benefits of limiting warming to 1.5g°C above pre-industrial levels, as advocated by the Paris Agreement of the United Nations Framework Convention on Climate Change (UNFCCC). The HAPPI experimental design allows an assessment of uncertainty in the circulation response due to model dependence and internal variability. Internal variability is found to dominate the multi-model mean response of the jet streams, storm tracks, and stationary waves across most of the midlatitudes; larger signals in these features are mostly consistent with those seen in more strongly forced warming scenarios. Signals that emerge in the 1.5g°C experiment are a weakening of storm activity over North America, an inland shift of the North American stationary ridge, an equatorward shift of the North Pacific jet exit, and an equatorward intensification of the South Pacific jet. Signals that emerge under an additional 0.5g°C of warming include a poleward shift of the North Atlantic jet exit, an eastward extension of the North Atlantic storm track, and an intensification on the flanks of the Southern Hemisphere storm track. Case studies explore the implications of these circulation responses for precipitation impacts in the Mediterranean, in western Europe, and on the North American west coast, paying particular attention to possible outcomes at the tails of the response distributions. For example, the projected weakening of the Mediterranean storm track emerges in the 2g°C warmer world, with exceptionally dry decades becoming 5 times more likely.
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- 2018
227. Anatomy of the Nose and Paranasal Sinuses
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Dalgorf, Dustin M., primary and Harvey, Richard J., additional
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- 2022
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228. Acute intoxication with diisopropylfluorophosphate promotes cellular senescence in the adult male rat brain
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Tsai, Yi-Hua, primary, González, Eduardo A., additional, Grodzki, Ana C. G., additional, Bruun, Donald A., additional, Saito, Naomi H., additional, Harvey, Danielle J., additional, and Lein, Pamela J., additional
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- 2024
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229. History of contrast enhanced ultrasound (CEUS)
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Dietrich, Christoph F., primary, Albrecht, Thomas, additional, Becher, Harald, additional, Harvey, Chris J., additional, Jenssen, Christian, additional, Lim, Adrian K., additional, Möller, Kathleen, additional, and Greis, Christian, additional
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- 2024
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230. Soft Robotics for Space Applications: Towards a Family of Locomotion Platforms
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Foster-Hall, William, primary, Harvey, David J., additional, and Akmeliawati, Rini, additional
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- 2024
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231. A consensus platform for antibody characterization
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Ayoubi, Riham, primary, Ryan, Joel, additional, Bolivar, Sara Gonzalez, additional, Alende, Charles, additional, Moleon, Vera Ruiz, additional, Fotouhi, Maryam, additional, Southern, Kathleen, additional, Alshafie, Walaa, additional, Baker, Matt R, additional, Ball, Alexander R, additional, Callahan, Danielle, additional, Cooper, Jeffery A, additional, Crosby, Katherine, additional, Harvey, Kevin J, additional, Houston, Douglas W, additional, Kumaran, Ravindran, additional, Rego, Meghan, additional, Schofield, Christine, additional, Wu, Hai, additional, Biddle, Michael S, additional, Brown, Claire M, additional, Kahn, Richard A, additional, Bandrowski, Anita, additional, Virk, Harvinder S, additional, Edwards, Aled M, additional, McPherson, Peter S, additional, and Laflamme, Carl, additional
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- 2024
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232. Clinical features of responders to mepolizumab in eosinophilic chronic rhinosinusitis and the outcomes post treatment cessation
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Ho, Jacqueline, primary, Walter, Sophie, additional, Alvarado, Raquel, additional, Grayson, Jessica W., additional, Campbell, Raewyn G., additional, Kalish, Larry H., additional, Sacks, Raymond, additional, Sewell, William A., additional, Rimmer, Janet, additional, and Harvey, Richard J., additional
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- 2024
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233. A maternal ketogenic diet alters oviduct fluid nutrients and embryo histone acetylation in mice
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Whatley, Emma G, primary, Harvey, Alexandra J, additional, and Gardner, David K, additional
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- 2024
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234. The α4 Nicotinic Acetylcholine Receptor Is Necessary for the Initiation of Organophosphate-Induced Neuronal Hyperexcitability
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Andrew, Peter M., primary, Feng, Wei, additional, Calsbeek, Jonas J., additional, Antrobus, Shane P., additional, Cherednychenko, Gennady A., additional, MacMahon, Jeremy A., additional, Bernardino, Pedro N., additional, Liu, Xiuzhen, additional, Harvey, Danielle J., additional, Lein, Pamela J., additional, and Pessah, Isaac N., additional
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- 2024
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235. Different methods of 3D QRS area calculation from vectorcardiographic X, Y, and Z Leads
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Noheria, Amit, primary, Toquica, Christian, additional, Mahmood, Uzair A., additional, DeBauge, Ashley, additional, Morey, Tucker, additional, and Harvey, Christopher J., additional
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- 2024
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236. Continuous Compartment Pressure Monitoring Allows the Early Detection of Compartment Syndrome After Arterial Revascularization
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Schupbach, Drew, primary, Reindl, Rudy, additional, Gill, Heather L, additional, Liberman, A S, additional, and Harvey, Edward J, additional
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- 2024
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237. Comparison of Allergen Immunotherapy Alone and in Conjunction With Turbinate Surgery for Nasal Obstruction in Perennial Allergic Rhinitis Patients
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Chong, Amaris Xin Jie, primary, Alvarado, Raquel, additional, Rimmer, Janet, additional, Campbell, Raewyn G., additional, Kalish, Larry, additional, Png, Lu Hui, additional, and Harvey, Richard J., additional
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- 2024
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238. Que signifie réellement le professionnalisme dans le paysage chirurgical contemporain?
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Ball, Chad G., primary, Inaba, Kenji, additional, and Harvey, Edward J., additional
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- 2024
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239. Catheter‐related superior vena cava syndrome: an increasing problem
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Harvey, John J, primary, Vrazas, John I, additional, Bekhit, Elhamy, additional, Barnes, Chris, additional, and Robinson, Philip J, additional
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- 2024
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240. Addressing climate change with behavioral science: A global intervention tournament in 63 countries
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Vlasceanu, Madalina, primary, Doell, Kimberly C., additional, Bak-Coleman, Joseph B., additional, Todorova, Boryana, additional, Berkebile-Weinberg, Michael M., additional, Grayson, Samantha J., additional, Patel, Yash, additional, Goldwert, Danielle, additional, Pei, Yifei, additional, Chakroff, Alek, additional, Pronizius, Ekaterina, additional, van den Broek, Karlijn L., additional, Vlasceanu, Denisa, additional, Constantino, Sara, additional, Morais, Michael J., additional, Schumann, Philipp, additional, Rathje, Steve, additional, Fang, Ke, additional, Aglioti, Salvatore Maria, additional, Alfano, Mark, additional, Alvarado-Yepez, Andy J., additional, Andersen, Angélica, additional, Anseel, Frederik, additional, Apps, Matthew A. J., additional, Asadli, Chillar, additional, Awuor, Fonda Jane, additional, Azevedo, Flavio, additional, Basaglia, Piero, additional, Bélanger, Jocelyn J., additional, Berger, Sebastian, additional, Bertin, Paul, additional, Białek, Michał, additional, Bialobrzeska, Olga, additional, Blaya-Burgo, Michelle, additional, Bleize, Daniëlle N. M., additional, Bø, Simen, additional, Boecker, Lea, additional, Boggio, Paulo S., additional, Borau, Sylvie, additional, Bos, Björn, additional, Bouguettaya, Ayoub, additional, Brauer, Markus, additional, Brick, Cameron, additional, Brik, Tymofii, additional, Briker, Roman, additional, Brosch, Tobias, additional, Buchel, Ondrej, additional, Buonauro, Daniel, additional, Butalia, Radhika, additional, Carvacho, Héctor, additional, Chamberlain, Sarah A. E., additional, Chan, Hang-Yee, additional, Chow, Dawn, additional, Chung, Dongil, additional, Cian, Luca, additional, Cohen-Eick, Noa, additional, Contreras-Huerta, Luis Sebastian, additional, Contu, Davide, additional, Cristea, Vladimir, additional, Cutler, Jo, additional, D'Ottone, Silvana, additional, De Keersmaecker, Jonas, additional, Delcourt, Sarah, additional, Delouvée, Sylvain, additional, Diel, Kathi, additional, Douglas, Benjamin D., additional, Drupp, Moritz A., additional, Dubey, Shreya, additional, Ekmanis, Jānis, additional, Elbaek, Christian T., additional, Elsherif, Mahmoud, additional, Engelhard, Iris M., additional, Escher, Yannik A., additional, Etienne, Tom W., additional, Farage, Laura, additional, Farias, Ana Rita, additional, Feuerriegel, Stefan, additional, Findor, Andrej, additional, Freira, Lucia, additional, Friese, Malte, additional, Gains, Neil Philip, additional, Gallyamova, Albina, additional, Geiger, Sandra J., additional, Genschow, Oliver, additional, Gjoneska, Biljana, additional, Gkinopoulos, Theofilos, additional, Goldberg, Beth, additional, Goldenberg, Amit, additional, Gradidge, Sarah, additional, Grassini, Simone, additional, Gray, Kurt, additional, Grelle, Sonja, additional, Griffin, Siobhán M., additional, Grigoryan, Lusine, additional, Grigoryan, Ani, additional, Grigoryev, Dmitry, additional, Gruber, June, additional, Guilaran, Johnrev, additional, Hadar, Britt, additional, Hahnel, Ulf J.J., additional, Halperin, Eran, additional, Harvey, Annelie J., additional, Haugestad, Christian A. P., additional, Herman, Aleksandra M., additional, Hershfield, Hal E., additional, Himichi, Toshiyuki, additional, Hine, Donald W., additional, Hofmann, Wilhelm, additional, Howe, Lauren, additional, Huaman-Chulluncuy, Enma T., additional, Huang, Guanxiong, additional, Ishii, Tatsunori, additional, Ito, Ayahito, additional, Jia, Fanli, additional, Jost, John T., additional, Jovanović, Veljko, additional, Jurgiel, Dominika, additional, Kácha, Ondřej, additional, Kankaanpää, Reeta, additional, Kantorowicz, Jaroslaw, additional, Kantorowicz-Reznichenko, Elena, additional, Kaplan Mintz, Keren, additional, Kaya, Ilker, additional, Kaya, Ozgur, additional, Khachatryan, Narine, additional, Klas, Anna, additional, Klein, Colin, additional, Klöckner, Christian A., additional, Koppel, Lina, additional, Kosachenko, Alexandra I., additional, Kothe, Emily J., additional, Krebs, Ruth, additional, Krosch, Amy R., additional, Krouwel, Andre P.M., additional, Kyrychenko, Yara, additional, Lagomarsino, Maria, additional, Lamm, Claus, additional, Lange, Florian, additional, Lee Cunningham, Julia, additional, Lees, Jeffrey, additional, Leung, Tak Yan, additional, Levy, Neil, additional, Lockwood, Patricia L., additional, Longoni, Chiara, additional, López Ortega, Alberto, additional, Loschelder, David D., additional, Lu, Jackson G., additional, Luo, Yu, additional, Luomba, Joseph, additional, Lutz, Annika E., additional, Majer, Johann M., additional, Markowitz, Ezra, additional, Marsh, Abigail A., additional, Mascarenhas, Karen Louise, additional, Mbilingi, Bwambale, additional, Mbungu, Winfred, additional, McHugh, Cillian, additional, Meijers, Marijn H.C., additional, Mercier, Hugo, additional, Mhagama, Fenant Laurent, additional, Michalakis, Katerina, additional, Mikus, Nace, additional, Milliron, Sarah, additional, Mitkidis, Panagiotis, additional, Monge-Rodríguez, Fredy S., additional, Mora, Youri L., additional, Moreau, David, additional, Motoki, Kosuke, additional, Moyano, Manuel, additional, Mus, Mathilde, additional, Navajas, Joaquin, additional, Nguyen, Tam Luong, additional, Nguyen, Dung Minh, additional, Nguyen, Trieu, additional, Niemi, Laura, additional, Nijssen, Sari R. R., additional, Nilsonne, Gustav, additional, Nitschke, Jonas P., additional, Nockur, Laila, additional, Okura, Ritah, additional, Öner, Sezin, additional, Özdoğru, Asil Ali, additional, Palumbo, Helena, additional, Panagopoulos, Costas, additional, Panasiti, Maria Serena, additional, Pärnamets, Philip, additional, Paruzel-Czachura, Mariola, additional, Pavlov, Yuri G., additional, Payán-Gómez, César, additional, Pearson, Adam R., additional, Pereira da Costa, Leonor, additional, Petrowsky, Hannes M., additional, Pfattheicher, Stefan, additional, Pham, Nhat Tan, additional, Ponizovskiy, Vladimir, additional, Pretus, Clara, additional, Rêgo, Gabriel G., additional, Reimann, Ritsaart, additional, Rhoads, Shawn A., additional, Riano-Moreno, Julian, additional, Richter, Isabell, additional, Röer, Jan Philipp, additional, Rosa-Sullivan, Jahred, additional, Ross, Robert M., additional, Sabherwal, Anandita, additional, Saito, Toshiki, additional, Sarrasin, Oriane, additional, Say, Nicolas, additional, Schmid, Katharina, additional, Schmitt, Michael T., additional, Schoenegger, Philipp, additional, Scholz, Christin, additional, Schug, Mariah G., additional, Schulreich, Stefan, additional, Shreedhar, Ganga, additional, Shuman, Eric, additional, Sivan, Smadar, additional, Sjåstad, Hallgeir, additional, Soliman, Meikel, additional, Soud, Katia, additional, Spampatti, Tobia, additional, Sparkman, Gregg, additional, Spasovski, Ognen, additional, Stanley, Samantha K., additional, Stern, Jessica A., additional, Strahm, Noel, additional, Suko, Yasushi, additional, Sul, Sunhae, additional, Syropoulos, Stylianos, additional, Taylor, Neil C., additional, Tedaldi, Elisa, additional, Tinghög, Gustav, additional, Huynh, Luu Duc Toan, additional, Travaglino, Giovanni Antonio, additional, Tsakiris, Manos, additional, Tüter, İlayda, additional, Tyrala, Michael, additional, Uluğ, Özden Melis, additional, Urbanek, Arkadiusz, additional, Valko, Danila, additional, van der Linden, Sander, additional, van Schie, Kevin, additional, van Stekelenburg, Aart, additional, Vanags, Edmunds, additional, Västfjäll, Daniel, additional, Vesely, Stepan, additional, Vintr, Jáchym, additional, Vranka, Marek, additional, Wanguche, Patrick Otuo, additional, Willer, Robb, additional, Wojcik, Adrian Dominik, additional, Xu, Rachel, additional, Yadav, Anjali, additional, Zawisza, Magdalena, additional, Zhao, Xian, additional, Zhao, Jiaying, additional, Żuk, Dawid, additional, and Van Bavel, Jay J., additional
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- 2024
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241. Development of a Tool for Navigating the Evidence concerning Land Managers and Woodland Creation in the United Kingdom
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Petrokofsky, Gillian, primary, Dunn, Michael, additional, Edwards, David, additional, Harvey, William J., additional, Hemery, Gabriel E., additional, Marshall, Harry, additional, McConnachie, Stephen, additional, Petrokofsky, Leo, additional, Watts, Kevin, additional, and Ambrose-Oji, Bianca, additional
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- 2024
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242. Wildfire-Driven Forest Conversion in Western North American Landscapes
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COOP, JONATHAN D., PARKS, SEAN A., STEVENS-RUMANN, CAMILLE S., CRAUSBAY, SHELLEY D., HIGUERA, PHILIP E., HURTEAU, MATTHEW D., TEPLEY, ALAN, WHITMAN, ELLEN, ASSAL, TIMOTHY, COLLINS, BRANDON M., DAVIS, KIMBERLEY T., DOBROWSKI, SOLOMON, FALK, DONALD A., FORNWALT, PAULA J., FULÉ, PETER Z., HARVEY, BRIAN J., KANE, VAN R., LITTLEFIELD, CAITLIN E., MARGOLIS, ELLIS Q., NORTH, MALCOLM, PARISIEN, MARC-ANDRÉ, PRICHARD, SUSAN, and RODMAN, KYLE C.
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- 2020
243. Assessment of magnetic resonance imaging criteria for the diagnosis of cavernous sinus invasion by pituitary tumors
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Chang, Nicholas, Grayson, Jessica W., Mangussi-Gomes, João, Fung, Sebastian, Alvarado, Raquel, Winder, Mark, Jonker, Benjamin P., McCormack, Ann, and Harvey, Richard J.
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- 2021
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244. Functionalisation of spider silk protein 4RepCT using un-natural amino acid mutagenesis and click chemistry
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Harvey, David J.
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572 ,QD415 Biochemistry - Abstract
Interest in spider silk as a biomaterial has recently increased owing to its strength, biocompatibility, biodegradability, lack of immunogenicity and pyrogenicity. Unfortunately large scale production from spiders is highly impractical, as their cannibalistic nature prevents them from being farmed. As a consequence of this, scalable production of recombinant spider silk sequences in E.coli has emerged. There is a demand for functionalised silk materials tailored for specific novel applications. Previously this has been achieved through genetic fusion, which can prove difficult when using highly GC rich silk sequences, or classical chemical conjugation methods that are non-residue or non-site specific. The aim of the research described in this thesis was to produce a chemically modifiable self-assembling spider silk protein through the incorporation of a non-canonical amino acid into a miniature spidroin construct (4RepCT). To achieve this, a methionine auxotrophic strain of E.coli has been used to incorporate a methionine analogue (L-azidohomoalanine (L-Aha)) in place of all three methionine residues in the mature 4RepCT sequence to give 4RepCT3Aha. I have demonstrated that this did not adversely affect the normal self-assembly process of the protein into fibres. Subsequently the silk protein was functionalised using either copper-catalysed azide-alkyne cycloaddition (CuAAC) or strain-promoted azide-alkyne cycloaddition (SPAAC) in so called click chemistry reactions for a number of purposes. Firstly, the presence of 2 L-Aha residues was verified by the successful conjugation of alkyne modified fluorophores to both soluble spidroin protein and pre-made fibres. Following this proof of principle 4RepCT3Aha fibres were then functionalised with the broad spectrum antibiotic levofloxacin endowing the fibres with antimicrobial activity which has been demonstrated against E.coli NCTC 12242. Another potential area of application for spider silk is as a cell scaffold for use in wound healing and tissue engineering. 4RepCT3Aha has been modified through conjugation of alkyne modified cyclic peptides bearing an RGD motif to improve its capacity to support mesenchymal stem cells. This was demonstrated to be more effective in supporting growth of the cells compared to routinely used tissue culture plastics. The successful modifications of 4RepCT3Aha reported in this thesis highlight the versatility of the residue-specific click chemistry modification approach, generating new bespoke silk-based materials relevant in a wide range of applications.
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- 2017
245. Computing the Independence Polynomial: from the Tree Threshold down to the Roots
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Harvey, Nicholas J. A., Srivastava, Piyush, and Vondrák, Jan
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Computer Science - Data Structures and Algorithms ,Computer Science - Computational Complexity ,Computer Science - Discrete Mathematics ,Mathematics - Combinatorics ,Mathematics - Probability - Abstract
We study an algorithm for approximating the multivariate independence polynomial $Z(\mathbf{z})$, with negative and complex arguments, an object that has strong connections to combinatorics and to statistical physics. In particular, the independence polynomial with negative arguments, $Z(-\mathbf{p})$, determines the Shearer region, the maximal region of probabilities to which the Lovasz Local Lemma (LLL) can be extended (Shearer 1985). In statistical physics, complex zeros of the independence polynomial relate to existence of phase transitions. Our main result is a deterministic algorithm to compute approximately the independence polynomial in any root-free complex polydisc centered at the origin. Our algorithm is essentially the same as Weitz's algorithm for positive parameters up to the tree uniqueness threshold, and the core of our analysis is a novel multivariate form of the correlation decay technique, which can handle non-uniform complex parameters. In particular, in the univariate real setting our work implies that Weitz's algorithm works in an interval between two critical points $(\lambda'_c(d), \lambda_c(d))$, and outside of this interval an approximation of $Z(\mathbf{z})$ is known to be NP-hard. As an application, we give a sub-exponential time algorithm for testing approximate membership in the Shearer region. We also give a new rounding based deterministic algorithm for Shearer's lemma (an extension of the LLL), which, however, runs in sub-exponential time. On the hardness side, we prove that evaluating $Z(\mathbf{z})$ at an arbitrary point in Shearer's region, and testing membership in Shearer's region, are #P-hard problems. We also establish the best possible dependence of the exponent of the run time of Weitz's correlation decay technique in the negative regime on the distance to the boundary of the Shearer region., Comment: 35 pages. Extended abstract to appear in Proceedings of ACM-SIAM SODA, 2018
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- 2016
246. Phaeohyphomycosis in Kidney Transplant Recipients: Highlighting the Importance of Early Recognition and Surgical Debridement
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Singla, Animesh A., Garg, Priya, Chui, Juanita N., Pham, David, Webb-Harvey, Zachary J., Halliday, Catriona L., De Silva, Ramesh, Hameed, Ahmer, Nulend, Rowan Klein, Lee, Taina, Wong, Germaine, and Pleass, Henry
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- 2023
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247. Integrating clinical medicine and population health : where to from here?
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Rouble, Andrew N., Zayed, Rim, Harvey, Bart J., and Loh, Lawrence C.
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- 2019
248. Abstract 13585: In Patients With Right Bundle Branch Block, ECG Z-Axis QRS-T Voltage-Time-Integral Predicts Right Ventricular Structure and Function
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Fairbank, Tyan, DeBauge, Ashley, Harvey, Christopher J, Ranka, Sagar, Jiwani, Sania, Sheldon, Seth H, Reddy, Madhu, Beaver, Timothy A, and Noheria, Amit
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- 2022
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249. Abstract 13586: In Patients With Left Bundle Branch Block, QRS Duration is a Stronger Predictor of Left Ventricular Hypertrophy and Dilation Than QRS Voltage
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DeBauge, Ashley, Fairbank, Tyan, Harvey, Christopher J, Ranka, Sagar, Jiwani, Sania, Sheldon, Seth H, Reddy, Madhu, Beaver, Timothy A, and Noheria, Amit
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- 2022
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250. Early wear detection and its significance for condition monitoring
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Lu, Ping, Powrie, Honor E., Wood, Robert J.K., Harvey, Terry J., and Harris, Nicholas R.
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- 2021
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