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772 results for “fronts”
Supporting information of Ultra-Wide Band Antipodal Vivaldi Antenna Using Metasurface Lens for Gain and Front-to-Back Ratio (FBR) Improvement
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Data and MATLAB code for the publication entitled "High-frequency Internal Waves Catalyzed by Submesoscale Fronts"
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Data from: Gene expression under thermal stress varies across a geographic range expansion front
Many ectothermic species are currently expanding their distributions polewards due to anthropogenic global warming. Molecular genetic mechanisms facilitating range expansion under these conditions are largely unknown, but understanding these could help mitigate expanding pests and disease vectors, or help explain why some species fail to track changing climates. Here, using RNA-seq data, we examine genome-wide changes in gene expression under heat and cold stress in the range-expanding damselfly Ischnura elegans in northern Europe. We find that both the number of genes involved and levels of gene expression under heat stress have become attenuated during the expansion, consistent with a previously-reported release from selection on heat tolerances as species move polewards. Genes upregulated under cold stress differed between core and edge populations, corroborating previously-reported rapid adaptation to cooler climates at the expansion front. Expression of sixty-nine genes exhibited a region x treatment effect; these were primarily upregulated in response to heat stress in core populations but in response to cold stress at the range edge, suggesting that some cellular responses originally adapted to heat stress may switch to cold stress functionality upon encountering novel thermal selection regimes during range expansion. Transcriptional responses to thermal stress involving heat shock and neural function genes were largely geographically conserved, while retrotransposon, regulatory, muscle function and defence gene expression patterns were more variable. Flexible mechanisms of cold stress response and the ability of some genes to shift their function between heat and cold stress might be key mechanisms facilitating rapid poleward expansion in insects.
Data from: How obstacles perturb population fronts and alter their genetic structure
As populations spread into new territory, environmental heterogeneities can shape the population front and genetic composition. We focus here on the effects of an important building block of heterogeneous environments, isolated obstacles. With a combination of experiments, theory, and simulation, we show how isolated obstacles both create long-lived distortions of the front shape and amplify the effect of genetic drift. A system of bacteriophage T7 spreading on a spatially heterogeneous Escherichia coli lawn serves as an experimental model system to study population expansions. Using an inkjet printer, we create well-defined replicates of the lawn and quantitatively study the population expansion of phage T7. The transient perturbations of the population front found in the experiments are well described by a model in which the front moves with constant speed. Independent of the precise details of the expansion, we show that obstacles create a kink in the front that persists over large distances and is insensitive to the details of the obstacle's shape. The small deviations between experimental findings and the predictions of the constant speed model can be understood with a more general reaction-diffusion model, which reduces to the constant speed model when the obstacle size is large compared to the front width. Using this framework, we demonstrate that frontier genotypes just grazing the side of an isolated obstacle increase in abundance, a phenomenon we call 'geometry-enhanced genetic drift', complementary to the founder effect associated with spatial bottlenecks. Bacterial range expansions around nutrient-poor barriers and stochastic simulations confirm this prediction. The effect of the obstacle on the genealogy of individuals at the front is characterized by simulations and rationalized using the constant speed model. Lastly, we consider the effect of two obstacles on front shape and genetic composition of the population illuminating the effects expected from complex environments with many obstacles.
Supplementary material 1 from: Gariepy TD, Musolin DL, Konjević A, Karpun NN, Zakharchenko VY, Zhuravleva EN, Tavella L, Bruin A, Haye T (2021) Diversity and distribution of cytochrome oxidase I (COI) haplotypes of the brown marmorated stink bug, Halyomorpha halys Stål (Hemiptera, Pentatomidae), along the eastern front of its invasive range in Eurasia. NeoBiota 68: 53-77. https://doi.org/10.3897/neobiota.68.68915
Table S1. Collection information and GPS coordinates
Figure 1 from: Kress W, Knapp S, Stoev P, Penev L (2012) On the front line of modern data-management and Open Access publishing: Two years of PhytoKeys – the fastest growing journal in plant systematics. PhytoKeys 19: 1-8. https://doi.org/10.3897/phytokeys.19.4501
Figure 1 - Total number of submitted manuscripts, published articles and pages per year in PhyltoKeys.
Firenze, Italia. Santa Maria Novella, west front.
<p>Firenze, Italia. Santa Maria Novella, west front.</p>
Fig. 50. Begonia joshii Moonlight. A. Habit. B. Leaf, adaxial surface. C. Leaf, abaxial surface. D. Inflorescence. E. Staminate flower, front view. F. Staminate flower, side view. G in The genus Begonia (Begoniaceae) in Peru
Fig. 50. Begonia joshii Moonlight. A. Habit. B. Leaf, adaxial surface. C. Leaf, abaxial surface. D. Inflorescence. E. Staminate flower, front view. F. Staminate flower, side view. G. Smallest tepal of staminate flower. H. Largest tepal of staminate flower. I. Androecium, side view. J. Pistillate flower, front view. K. Pistillate flower, side view. L. Cross section of ovary. M. Smallest tepal of pistillate flower. N. Largest tepal of pistillate flower. O. Pistils, side view. All photographs taken by D.A. Purvis in the living collections of the Royal Botanic Garden Edinburgh (Accession 20180923, grown from seeds collected as part of P.W. Moonlight 1253). Reproduced from Moonlight et al. (2020), with the permission of Edinburgh Journal of Botany.
Fig. 67. Begonia arrogans Irmsch. A. Habit with sun leaves. B. Shade leaf, adaxial surface. C. Stipule. D. Bract, adaxial surface. E. Staminate flower, front view. F in The genus Begonia (Begoniaceae) in Peru
Fig. 67. Begonia arrogans Irmsch. A. Habit with sun leaves. B. Shade leaf, adaxial surface. C. Stipule. D. Bract, adaxial surface. E. Staminate flower, front view. F. Smallest tepal of the staminate flower. G. Largest tepal of the staminate flower. H. Androecium, side view. I. Pistillate flower, side view. J. Pistillate flower, front view. K. Cross section of ovary. L. Smallest tepal of the pistillate flower. M. Largest tepal of the pistillate flower. N. Gynoecium, side view. All photographs taken by D.A. Purvis & P.W. Moonlight in the living collections of the Royal Botanic Garden Edinburgh (Accession 20160124, grown from seeds collected as part of P.W. Moonlight & A. Daza 239).
Fig. 33. Begonia obtecticaulis Irmsch. A. Habit. B. Leaf, abaxial surface. C. Leaf, adaxial surface. D. Stipule. E. Inflorescence. F. Bract. G. Pistillate flower, side view. H. Pistillate flower, front view. I in The genus Begonia (Begoniaceae) in Peru
Fig. 33. Begonia obtecticaulis Irmsch. A. Habit. B. Leaf, abaxial surface. C. Leaf, adaxial surface. D. Stipule. E. Inflorescence. F. Bract. G. Pistillate flower, side view. H. Pistillate flower, front view. I. Cross section of ovary. J. Largest tepal of the pistillate flower. K. Smallest tepal of the pistillate flower. L. Pistils, side view. M. Pistils, front view. N. Staminate flower, side view. O. Staminate flower, front view. P. Androecium, side view. All photographs taken by D.A. Purvis in the living collections of the Royal Botanic Garden Edinburgh (Accession 20160137a, grown from seeds collected as part of P.W. Moonlight & A. Daza 209).
Fig. 30. Begonia lamolina Moonlight. A. Habit. B. Leaf, abaxial surface. C. Inflorescence. D. Pistillate flower, side view. E. Pistillate flower, front view. F in The genus Begonia (Begoniaceae) in Peru
Fig. 30. Begonia lamolina Moonlight. A. Habit. B. Leaf, abaxial surface. C. Inflorescence. D. Pistillate flower, side view. E. Pistillate flower, front view. F. Staminate flower, front view. Illustration by Peter Moonlight from photographs of P.W. Moonlight & A. Daza 146 (A) and 1142 (B–F); all scale bars estimated.
Impact of Front-of-pack Nutrition Labelling on Consumer Purchases
ClinicalTrials.gov study NCT02546505. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Neoadjuvant Therapy With Conservative Surgery vs. Up-front Conservative Surgery for BRAF V600E-Mutated Ameloblastoma
ClinicalTrials.gov study NCT06819605. IPD Sharing: NO. Countries: 0. Publications: 2.
Effect of an Educational Intervention About Front of Package Labeling in Children and Caregivers.
ClinicalTrials.gov study NCT06102473. IPD Sharing: NO. Countries: 0. Publications: 13.
Safety and Performance Study of the RELIANCE 4-Front Passive Fixation Lead
ClinicalTrials.gov study NCT01856491. IPD Sharing: Not stated. Countries: 3. Publications: 0.
Ibrutinib in Treating Minimal Residual Disease in Patients With Chronic Lymphocytic Leukemia After Front-Line Therapy
ClinicalTrials.gov study NCT02649387. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Pazopanib as Front-Line Therapy in Patients With Non-Resectable or Metastatic Soft Tissue Sarcomas Who Are Not Candidates for Chemotherapy
ClinicalTrials.gov study NCT02300545. IPD Sharing: NO. Countries: 1. Publications: 0.
Safety and Performance Study of the Reliance 4-Front Lead
ClinicalTrials.gov study NCT01772576. IPD Sharing: NO. Countries: 11. Publications: 0.
A Phase II Study Using Rituximab Plus Venetoclax in the Front Line Treatment of Marginal Zone Lymphoma
ClinicalTrials.gov study NCT04416451. IPD Sharing: YES. Countries: 1. Publications: 0.
Effectiveness of Different Front-of-Pack Nutritional Labels in Promoting Greater Adherence to the Mediterranean Diet Among Italian Consumers
ClinicalTrials.gov study NCT06488079. IPD Sharing: NO. Countries: 1. Publications: 0.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.