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2,142 results for “by contact”
Contact mechanics analyis for chip tool contact in metal cutting of AISI4140
<p>Collection of files to reproduce the contact mechanics analysis in:</p> <p>"Multiscale parametrization of a friction model for metal cutting using contact mechanics, atomistic simulations, and experiments"</p> <p>Authors:<br>Hannes Holey, Florian Sauer, Prasanth Babu Ganta, Leonhard Mayrhofer, Martin Dienwiebel, Volker Schulze, Michael Moseler</p> <p>Tribology Letters 72 (2024)</p> <p>DOI: 10.1007/s11249-024-01906-9</p>
Recent ice-contact delta formation in front of Pio XI glacier controls sedimentary processes in Eyre Fjord, Patagonia
<p><span>Data for "Recent ice-contact delta formation in front of Pio XI glacier controls sedimentary processes in Eyre Fjord, Patagonia"</span></p>
Atomically resolved imaging of the conformations and adsorption geometries of individual β-cyclodextrins with non-contact AFM
<p>Raw data for publication titled <em>Atomically resolved imaging of the conformations and adsorption geometries of individual β-cyclodextrins with non-contact AFM.</em></p>
Voices from Cabinda: Audio files of the examples in the chapter of "Afro-Iberian Languages: Contact and Sociohistory" (LangSciPress)
<p>Audio files (and a few videos) corresponding to the examples presented throughout the chapter on Cabindan Portuguese, included in the volume <em>Afro-Iberian Languages: Contact and Sociohistory</em> (Lamberti/Agostinho, eds.; Language Science Press: https://langsci-press.org/catalog/book/392). The chapter provides a panoramic overview of the main structural features of Cabindan Portuguese, preceded by a historical section on the spread of Portuguese in this Central African region, as well as a sociolinguistic section.</p>
Gambia_Main Contact Survey
Open the record for dataset details and reuse information.
Data from: Seasonal variation in daily patterns of social contacts in the European badger Meles meles
Social interactions among hosts influence the persistence and spread of infectious pathogens. Daily and seasonal variation in the frequency and type of social interactions will play an important role in disease epidemiology and, alongside other factors, may have an influence on wider disease dynamics by causing seasonal forcing of infection, especially if the seasonal variation experienced by a population is considerable. We explored temporal variation in within-group contacts in a high-density population of European badgers Meles meles naturally infected with Mycobacterium bovis (the causative agent of bovine tuberculosis). Summer contacts were more likely and of longer duration during the daytime, while the frequency and duration of winter contacts did not differ between day and night. In spring and autumn, within-group contacts peaked at dawn and dusk, corresponding with when they were of shortest duration with reduced potential for aerosol transmission of pathogens. Summer and winter could be critical for transmission of M. bovis in badgers, due to the high frequency and duration of contacts during resting periods, and we discuss the links between this result and empirical disease data. This study reveals clear seasonality in daily patterns of contact frequency and duration in species living in stable social groups, suggesting that changes in social contacts could drive seasonal forcing of infection in wildlife populations even when the number of individuals interacting remains similar.
Data from: Malaria infections reinforce competitive asymmetry between two Ficedula flycatchers in a recent contact zone
Parasites may influence the outcome of interspecific competition between closely related host species through lower parasite virulence in the host with which they share the longer evolutionary history. We tested this idea by comparing the prevalence of avian malaria (Haemosporidia) lineages and their association with survival in pied and collared flycatchers (Ficedula hypoleuca and F. albicollis) breeding in a recent contact zone on the Swedish island of Öland. A nested PCR protocol amplifying haemosporidian fragments of mtDNA was used to screen the presence of malaria lineages in 1048 blood samples collected during 6 years. Competitively inferior pied flycatchers had a higher prevalence of blood parasites, including the lineages that were shared between the two flycatcher species. Multistate mark–recapture models revealed a lower survival of infected versus uninfected female pied flycatchers, while no such effects were detected in male pied flycatchers or in collared flycatchers of either sex. Our results show that a comparatively new host, the collared flycatcher, appears to be less susceptible to a local northern European malarial lineage where the collared flycatchers have recently expanded their distribution. Pied flycatchers experience strong reproductive interference from collared flycatchers, and the additional impact of species-specific blood parasite effects adds to this competitive exclusion. These results support the idea that parasites can strongly influence the outcome of interspecific competition between closely related host species, but that the invading species need not necessarily be more susceptible to local parasites.
Social contact data for the Netherlands
<p>Social contact data for the Netherlands.</p>
Data from: Low levels of hybridization across two contact zones among three species of woodpeckers (Sphyrapicus sapsuckers)
Three species of closely related woodpeckers (sapsuckers; Sphyrapicus) hybridize where they come into contact, presenting a rare 'λ‐shape' meeting of hybrid zones. Two of the three arms of this hybrid zone are located on either side of the Interior Plateau of British Columbia, Canada bordering the foothills of the Coast Mountains and the Rocky Mountains. The third arm is located in the eastern foothills of the Rocky Mountains. The zones of hybridization present high variability of phenotypes and alleles in relatively small areas and provide an opportunity to examine levels of reproductive isolation between the taxa involved. We examined phenotypes (morphometric traits and plumage) and genotypes of 175 live birds across the two hybrid zones. We used the Genotyping By Sequencing (GBS) method to identify 180 partially diagnostic single nucleotide polymorphisms (SNPs) to generate a genetic hybrid index (GHI) for each bird. Phenotypically diverged S. ruber and S. nuchalis are genetically closely related, while S. nuchalis and S. varius have similar plumage but are well separated at the genetic markers studied. The width of both hybrid zones is narrower than expected under neutrality, and analyses of both genotypes and phenotypes indicate that hybrids are rare in the hybrid zone. Rarity of hybrids indicates assortative mating and/or some form of fitness reduction in hybrids, which might maintain the species complex despite close genetic distance and introgression. These findings further support the treatment of the three taxa as distinct species.
The role of local impedance drop in the acute lesion efficacy during pulmonary vein isolation performed with a new contact force sensing catheter – a pilot study
<p>The role of local impedance drop in the acute lesion efficacy during pulmonary vein isolation performed with a new contact force sensing catheter – a pilot study</p>
Data from: Phylogeography of the Neotropical epiphytic orchid, Brassavola nodosa: evidence for a secondary contact zone in northwestern Costa Rica
Spatial patterns of genetic variation can reveal otherwise cryptic evolutionary and landscape processes. In northwestern Costa Rica, an approximately concordant genetic discontinuity occurs among populations of several plant species. We conducted phylogeographic analyses of an epiphytic orchid, Brassavola nodosa, to test for genetic discontinuity and to explore its underlying causes. We genotyped 18 populations with 19 nuclear loci and two non-coding chloroplast sequence regions. We estimated genetic diversity and structure, relative importance of pollen and seed dispersal, and divergence time to understand how genetic diversity was spatially partitioned. Nuclear genetic diversity was high with little differentiation among populations (GSTn = 0.065). In contrast, chloroplast haplotypes were highly structured (GSTc = 0.570) and reveal a discontinuity between northwestern and southeastern populations within Costa Rica. Haplotype differences suggest two formerly isolated lineages that diverged approximately 10,000-100,000 YBP. Haplotype mixing and greater genetic diversity occur in an intermediate transition zone. Patterns of nuclear and chloroplast data were consistent. Different levels of genetic differentiation for the two genomes reflect the relative effectiveness of biotic versus abiotic dispersers of pollen and seeds. Isolation of the two lineages likely resulted from the complex environmental and geophysical history of the region. Our results suggest a recent cryptic seed dispersal barrier and/or zone of secondary contact. We hypothesize that powerful northeasterly trade winds hinder movement of wind-borne seeds between the two regions, while the multi-directional dispersal of pollen by strong-flying sphinx moths resulted in lower differentiation of nuclear loci.
Data from: Genetic Variation in Plethodon cinereus and Plethodon hubrichti from in and Around a Contact Zone
Climate change poses several challenges to biological communities including changes in the frequency of encounters between closely related congeners as a result of range shifts. When climate change leads to increased hybridization, hybrid dysfunction or genetic swamping may increase extinction risk—particularly in range-restricted species with low vagility. The Peaks of Otter Salamander, Plethodon hubrichti, is a fully terrestrial woodland salamander that is restricted to ~ 18 km of ridgeline in the mountains of southwestern Virginia, and its range is surrounded by the abundant and widespread Eastern Red-backed Salamander, Plethodon cinereus. In order to determine whether these two species are hybridizing and how their range limits may be shifting, we assessed variation at eight microsatellite loci and a 1008 bp region of Cytochrome B in both species at allopatric reference sites and within a contact zone. Our results show that hybridization between P. hubrichti and P. cinereus either does not occur or is very rare. However, we find that diversity and differentiation are substantially higher in the mountaintop endemic P. hubrichti than in the widespread P. cinereus, despite similar movement ability for the two species as assessed by a homing experiment. Furthermore, estimation of divergence times between reference and contact zone populations via approximate Bayesian computation is consistent with the idea that P. cinereus has expanded into the range of P. hubrichti. Given the apparent recent colonization of the contact zone by P. cinereus, future monitoring of P. cinereus range limits should be a priority for the management of P. hubrichti populations.
Self-Strain-Sensing: Comparison of Contact Materials
<p>These Datasets were used to compare different contacting methods for the development of Self-Strain-Sensing CFRP parts.</p>
The dataset used in "A max-margin model for predicting residue-base contacts in protein-RNA interactions"
<p>The dataset used in "A max-margin model for predicting residue-base contacts in protein-RNA interactions"</p>
Data for "Clean ballistic quantum point contact in SrTiO3"
<p>Spreadsheets containing raw data, axis and trace labels from submitted manuscript "Clean ballistic quantum point contact in SrTiO<sub>3</sub>".</p>
Coiled tubing contact analysis data and source code
<p>基于数字孪生的连续油管接触分析数据及源代码研究</p>
FIGURE 6 in Two noteworthy Calea (Asteraceae: Neurolaeneae) from contact areas of the Atlantic Forest and Cerrado of Brazil
FIGURE 6. Principal Component Analysis performed with the informative morphological characters of C. × parviantha and its parents: C. parvifolia and C. triantha. 1. Calea triantha. 2. Calea × parviantha. 3. Calea parvifolia. Figure by Marcelo L. Bueno.
FIGURE 5 in Two noteworthy Calea (Asteraceae: Neurolaeneae) from contact areas of the Atlantic Forest and Cerrado of Brazil
FIGURE 5. Calea × parviantha nothospecies nov. (Neurolaeneae, Asteraceae) in tropical high elevation grasslands in the contact zone of the Atlantic Forest and Cerrado domains at Porto Amazonas, Paraná, Brazil. A. Leaf abaxial surfaces and phyllaries of involucrum. B. Radiate capitulum. Photos by R. T. Dall'Agnol.
FIGURE 4 in Two noteworthy Calea (Asteraceae: Neurolaeneae) from contact areas of the Atlantic Forest and Cerrado of Brazil
FIGURE 4. Comparative illustration of informative structures to recognize the new nothospecies Calea × parviantha in comparison to its parental species C. parvifolia and C. triantha (Neurolaeneae, Asteraceae) A–C. Indumentum of stems. D–H. Cypselae with pappus scales. I–K. Leaves, abaxial surface with venation. L–N Abaxial surface with vein and indumentum in detail. A, D, E, I and L: Calea parvifolia drawn from M. L. Brotto et al. 3175 (MBM). B, F, G, J and M: Calea × parviantha nothospecies nov. drawn from A. C. Cervi 3546 (MBM). C, H, K and N: Calea triantha drawn from G. Heiden et al. 2312 (ECT); A–M: millimeter scale. Illustration by Débora Dalzotto.
FIGURE 3 in Two noteworthy Calea (Asteraceae: Neurolaeneae) from contact areas of the Atlantic Forest and Cerrado of Brazil
FIGURE 3. Prediction occurrence map of suitable ecological niche modelling for Calea grandiflora and C. × parviantha (Neurolaeneae, Asteraceae). Figure by: Marcelo L. Bueno.
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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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.