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22 results for “asymmetric structure”
Structurally well-defined anti-π-allyliridium complexes catalyze Z-retentive asymmetric allylic alkylation of oxindoles
<p>Uploaded herein are all the output files of the computational studies on Ir-catalyzed <em>Z</em>-retentive asymmetric allylic alkylation of oxindoles.</p> <p>Some Gaussian checkpoint files, summary of Mayer bond order calculations (as plain txt files), and the output and checkpoint files of the calculations on a known Ir-complex (JACS, 2017, 3606), are included in this update.</p>
Figure 2: Impedance by means of Bode-plot representation, symmetric (con- tinuous line) and the asymmetric (dashed line) tree.-THE RESPIRATORY IMPEDANCE IN AN ASYMMETRIC MODEL OF THE LUNG STRUCTURE
<p>Figure 2 shows the total impedance by means of its Bode plot, for the symmetric and the asymmetric tree, whereas the airway tubes are modelled by an R ¡ L ¡ C element in both representations.<br> It is signi¯cant to observe that in the frequency interval of clinical interest,<br> ! 2 [25; 300] rad/s, the two impedances tend to behave similarly. For the asymmetric case, we have a decrease of about -10dB/dec and a phase of ap-proximately ¡50o, resulting in a fractional order of n »=0:5. This observation suggests that a combined e®ect of more than one fractal order is present in the lungs and that it leads naturally to values closer to measured data in the low<br> frequency range.</p>
Figure 4: The estimated impedance within the measured frequency range for the symmetric (*) and the asymmetric (o) case against averaged data from healthy subjects-THE RESPIRATORY IMPEDANCE IN AN ASYMMETRIC MODEL OF THE LUNG STRUCTURE
<p>It is significant to observe that in the frequency interval of clinical interest,<br> ! 2 [25; 300] rad/s, the two impedances tend to behave similarly. For the<br> asymmetric case, we have a decrease of about -10dB/dec and a phase of ap-<br> proximately ¡50o, resulting in a fractional order of n »=</p> <p>This observation suggests that a combined efect of more than one fractal order is present in the<br> lungs and that it leads naturally to values closer to measured data in the low<br> frequency range. In other words, the symmetric tree representation does not<br> suffice to obtain a good fit between the model and the measured impedance<br> data. Another observation is that the constant-phase behavior is emphasized<br> at frequencies below those evaluated standardly in clinical practice, i.e. below<br> 5Hz. However, in the standard clinical range of frequencies for the forced oscil-<br> lation technique, namely 4-48Hz, both symmetric and asymmetric tree models<br> give similar results, as depicted in ¯gure 4</p>
Figure 3: Number of branches for each generation, in the asymmetric (TOP) and symmetric (BOTTOM) generation. Notice that the Y-axis is logarithmic.-THE RESPIRATORY IMPEDANCE IN AN ASYMMETRIC MODEL OF THE LUNG STRUCTURE
<p>Figure 3 shows the number of branches that are in one generation, for the symmetric and asymmetric<br> lung structure. Notice the diferent slope which characterizes the space-filling distribution.</p>
Figure 1: Asymmetric representation for the ¯rst four generations, in its elec- trical equivalent-THE RESPIRATORY IMPEDANCE IN AN ASYMMETRIC MODEL OF THE LUNG STRUCTURE
<p>For example, the average of the radius ratio<br> changes from 2¡0:1713 = 0:8881 to 0:8923 when only the ¯rst 16 generations are<br> taken into account, respectively to 0:8783 for the alveoli (generations 17-24)<br> [5]. This implies that the homothety factor changes, depending on the spatial<br> location within the tree. On the other hand, if we analyze the radius ratio from<br> generations 1 to 24 in steps of 4, we obtain an average of 0:8535, whereas if we<br> use steps of 2, we obtain an average homothety factor of 0:8623. These changes<br> might not seem signi¯cant, but one should recall that they are originated by<br> the symmetric geometry of the respiratory tree. However, when asymmetry<br> is considered, one deals with several homothety factors, i.e. as schematically<br> drawn in figure 1.</p>
Figure 1: Asymmetric representation for the ¯rst four generations, in its elec- trical equivalent-THE RESPIRATORY IMPEDANCE IN AN ASYMMETRIC MODEL OF THE LUNG STRUCTURE
<p>These changes<br> might not seem signi¯cant, but one should recall that they are originated by<br> the symmetric geometry of the respiratory tree. However, when asymmetry<br> is considered, one deals with several homothety factors, i.e. as schematically<br> drawn in ¯gure 1.</p>
Asymmetrical effects of temperature on stage-structured predator-prey interactions
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Asymmetrical hybridization and environmental factors influence the spatial genetic structure of a killifish hybrid zone
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Asymmetric reconstructions of helical structures
<p>This dataset includes the asymmetric reconstructions of 4 helical structures (TMV, VipA/VipB, MAVS-CARD, and HIV tube) from cryo-EM images</p>
Fits Data of "Multiple Rings and Asymmetric Structures in the Disk of SR 21"
<p>This is the fits data of the paper "Multiple Rings and Asymmetric Structures in the Disk of SR 21". </p>
Data from: The effect of initial vortex asymmetric structure on tropical cyclone intensity change in response to an imposed environmental vertical wind shear
<p>Previous studies have investigated how the environmental vertical wind shear (VWS) may trigger the asymmetric structure in an initially axisymmetric tropical cyclone (TC) vortex and how TC intensity changes in response. In this study, the possible effect of the initial vortex asymmetric structure on the TC intensity change in response to an imposed environmental VWS is investigated based on idealized full-physics model simulations. Results show that the effect of the asymmetric structure in the initial TC vortex can either enhance or suppress the initial weakening of the TC in response to the imposed environmental VWS. When the initial asymmetric structure is in phase of the VWS-induced asymmetric structure, the TC weakening will be enhanced and vice versa. Our finding calls for realistic representation of initial TC asymmetric structure in numerical weather prediction models and observations to better resolve the asymmetric structure in TCs.</p>
Data from: The effect of initial vortex asymmetric structure on tropical cyclone intensity change in response to an imposed environmental vertical wind shear
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From canopy complementarity to asymmetric competition: the negative relationship between structural diversity and productivity during succession
<p>1. Positive relationships between structural diversity and forest productivity have been documented in controlled experiments and early secondary forests, however, negative relationships have also been observed in late successional forests. The mechanisms causing observed relationships between structural diversity and productivity are not well established, but complementarity among crowns and asymmetric competition have been suggested.</p> <p>2. We used LiDAR and repeated census data to examine relationship between canopy structural diversity and productivity in nine 1-ha subtropical forest plots along a disturbance gradient in southeastern China. We quantified the relative importance of community composition, species diversity, canopy structural diversity, leaf area index (LAI), and disturbance regime on productivity using piecewise structural equation modelling. We also tested how vertical leaf area distribution effected productivity.</p> <p>3. Contrary to many prior observations, we found a negative relationship between canopy structural diversity and forest productivity. The negative effect may stem from asymmetric competition between overstory and understory leaves, leading to a lower leaf area efficiency (i.e., wood production per leaf area). Asymmetric competition was suggested by a negative relationship between understory leaf area and total productivity. Changes in community composition over the disturbance gradient, but not species diversity, had a significant effect on productivity.</p> <p>4. Synthesis. Our study suggests that leaf area and canopy structural diversity have contrasting effects on productivity in this subtropical forest, and this need to be considered when estimating rates of carbon sequestration in secondary forests. The negative effect of asymmetric competition on productivity is comparable to that of the shift in species composition over succession, highlighting the role of canopy structural diversity in shaping forest productivity.</p>
From canopy complementarity to asymmetric competition: the negative relationship between structural diversity and productivity during succession
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Data from: Asymmetric ON-OFF processing of visual motion cancels variability induced by the structure of natural scenes
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Data from: Highly asymmetric fine-scale genetic structure between sexes of African striped mice and indication for condition dependent alternative male dispersal tactics
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Effects of Asymmetric Rapid Maxillary Expansion on Dentoskeletal Structures in Mixed Dentition
ClinicalTrials.gov study NCT06486324. IPD Sharing: NO. Countries: 0. Publications: 3.
Data from: Asymmetric oceanographic processes mediate connectivity and population genetic structure as revealed by RADseq in a highly dispersive marine invertebrate (Parastichopus californicus)
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Neutron reflectometry datasets for "Structure and Hydration of Asymmetric Polyelectrolyte Multilayers as studied by Neutron Reflectometry: Connecting Multilayer Structure to Superior Membrane Performance"
<p>Reflectometry datasets collected from asymmetric polyelectrolyte films on the Platypus reflectometer.</p> <p>Analysis was undertaken in a <a href="https://jupyter.org/">jupyter notebook</a> environment. The notebook file is provided to allow reproduction of the analysis alongside a pdf copy for ease of access.</p> <p>The reflectometry data files provided are four-column text files. Column 1 is Q, column 2 is R, column 3 is R error, and column 4 is Q error (resolution).</p>
Data from: Asymmetric dispersal structures a riverine metapopulation of the freshwater pearl mussel Margaritifera laevis
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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.