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178 results for “Spiral”
Dataset for the publication "Implementation of an exact completing method of generation for face-milled spiral bevel gears with uniform depth taper"
<p>This dataset contains geometric and graphics data associated with the referenced paper, enabling the reproduction of the conducted research. </p>
Whole-brain background-suppressed pCASL MRI with 1D-accelerated 3D RARE Stack-Of-Spirals Readout- Dataset 2
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Whole-brain background-suppressed pCASL MRI with 1D-accelerated 3D RARE Stack-Of-Spirals Readout- Dataset 3
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The One-Armed Spiral Instability in Neutron Star Mergers and its Detectability in Gravitational Waves
<p>We distribute complete gravitational-wave signals in the Advanced LIGO band (10 Hz - 8192 Hz) of the inspiral and merger of two neutron stars. These waveforms been constructed by hybridizing numerical-relativity data obtained with the WhiskyTHC code [1] with tidal effective-one-body waveforms [2,3]. More details on the procedure used to generate these waveforms are given in [4]. </p> <p>The waveforms are distributed as HDF5 files containing the amplitude and phase of the -2 spin-weighted spherical harmonics multipoles of the strain:</p> <p><span class="math-tex">\(( h_+ - \mathrm{i} h_\times )_{l,m} = \frac{A_{l,m}}{D_{\rm cm}} \exp(-\mathrm{i} \phi_{l,m} )\)</span></p> <p>where <span class="math-tex">\(D_{\rm cm}\)</span> is the distance in cm from the source.</p> <p>The data files include a machine readable "/metadata" group with:</p> <ul> <li>/metadata/EOS: name of the equation of state</li> <li>/metadata/M_{A|B}: mass in isolation of star A (or B) in grams</li> <li>/metadata/R_{A|B}: radius of star A (or B) in cm</li> <li>/metadata/k2T: tidal coupling constant of the binary (see [3])</li> <li>/metadata/kl_{A|B}: l=2,3,4 dimensionless Love numbers of star A (or B)</li> </ul> <p>We store amplitude and phase for multipoles modes up to l=4 as time series sampled at 16384 Hz.</p> <p>We make these waveforms freely available in the hope that they will be useful. We kindly ask you to cite [3] and [4] in any publication resulting from the use of these waveforms.</p> <p>---<br /> [1] http://www.tapir.caltech.edu/~david_e/whiskythc.html<br /> [2] https://eob.ihes.fr/<br /> [3] S. Bernuzzi, A. Nagar, T. Dietrich, T. Damour; Modeling the Dynamics of Tidally Interacting Binary Neutron Stars up to the Merger; Phys.Rev.Lett. 114 (2015) 16, 161103.<br /> [4] D. Radice, S. Bernuzzi, C. D. Ott; The One-Armed Spiral Instability in Neutron Star Mergers and its Detectability in Gravitational Waves; arXiv:1603.05726.</p>
Symmetry breaking in spin spirals and skyrmions by in-plane and canted magnetic fields
<p>The influence of in-plane and canted magnetic fields on spin spirals and skyrmions in atomic bilayer<br> islands of palladium and iron on an Ir(111) substrate is investigated by scanning tunneling microscopy<br> at low temperatures. It is shown that the spin spiral propagation direction is determined by the island’s<br> border which can be explained by equilibrium state calculations on a triangular lattice.Wefind a<br> different response of spin spirals to in-plane magnetic fields for a propagation direction parallel to the<br> applied field as compared to perpendicular, which originates from their cycloidal nature. As a result,<br> the spin spiral propagation direction may be reorientated by in-plane fields. Furthermore, it is<br> demonstrated that also skyrmions are distorted in canted fields which allows to determine the sense of<br> magnetization rotation as enforced by the interfacial Dzyaloshinskii–Moriya interaction.</p>
Geologic time scale - log-spiral
<p>The geologic time scale proportionally represented as a log-spiral. Some key events in Earth's history are marked on the diagram, including major extinction events, global scale glaciations, the intiation of permanent atmospheric oxygen, the formation of the moon, and the formation of Earth's magnetic field. The outer spiral arcs show components of the evolution of life on Earth. There are three versions available each with a light/dark text variant. One version uses the official International Commission on Stratigraphy colour scheme for the time scale and the scientific colours batlow colour scheme for life evolution. The other two versions use scientific colour maps batlow/glasgow and glasgow/batlow for their time scale and history of life evolution respectively. The light variants have black text in transparent regions and should be used for light backgrounds, while the dark variants have white text in transparent zones and should be used on dark backgrounds.</p> <p>Version 1.0.1 corrects a spelling error</p> <p>Version 1.0.2 fixes transposed eon/era labels and adds PDF versions.</p> <p>Version 1.0.3 corrects a spelling error</p> <p>The julia code used to generate the base of the image is provided. Further editing was done in Inkscape.</p>
Merger simulation (elliptical & spiral galaxy)
<p><strong>Gadget-2 (Springel 2005) simulation of 3.56 Gyr evolution of a shell-creating merger with 1:10 stellar-mass ratio, elliptical primary galaxy and secondary with inclined disk and 6 kpc impact parameter. One second of the video corresponds to 60 Myr. For more details, see <a href="https://ui.adsabs.harvard.edu/abs/2020A%26A...634A..73E/abstract">Ebrová et al. (2020, A&A 634, 73)</a> </strong></p>
Text-fig. 19. Turritella shell from White Patch Fossil Site 1. a: stereo lateral view; b: obverse view to show the spiral ridges. in Stratigraphy, Chronology And Palaeontology Of The Tertiary Rocks Of The Cheringoma Plateau, Mozambique
Text-fig. 19. Turritella shell from White Patch Fossil Site 1. a: stereo lateral view; b: obverse view to show the spiral ridges.
Text-fig. 6. Transmitted light microphotographs of permineralized wood from Govone. a, b: cf. Cupressinoxylon sp., radial section, MGPT-PU141105, a – nodular end of ray parenchyma (arrow), b – thick and pitted horizontal walls of ray parenchyma (arrow). c–f: Pinaceae gen. et sp. indet., MGPT-PU141107, c – abnormal discoloration due to ecological disruptions (radial section), d – rays up to 10 cells high, uniseriate, partly biseriate (black arrow), intercellular spaces observed (white arrows) (tangential section), e – large, thick-walled axial resin canal with more than 9 epithelial cells observed, axial resin canal diameter>60 Μm (transverse section), f – spiral thickenings due to compression (white arrow) (radial section). in Remains Of A Subtropical Humid Forest In A Messinian Evaporitebearing Succession At Govone, Northwestern Italy - Preliminary Results
Text-fig. 6. Transmitted light microphotographs of permineralized wood from Govone. a, b: cf. Cupressinoxylon sp., radial section, MGPT-PU141105, a – nodular end of ray parenchyma (arrow), b – thick and pitted horizontal walls of ray parenchyma (arrow). c–f: Pinaceae gen. et sp. indet., MGPT-PU141107, c – abnormal discoloration due to ecological disruptions (radial section), d – rays up to 10 cells high, uniseriate, partly biseriate (black arrow), intercellular spaces observed (white arrows) (tangential section), e – large, thick-walled axial resin canal with more than 9 epithelial cells observed, axial resin canal diameter>60 Μm (transverse section), f – spiral thickenings due to compression (white arrow) (radial section).
531SS - System Spiral
<p>System Spiral</p>
Developments in taxonomy could see safari hunters killing 25 types of antelope, instead of the previous 9, to achieve the 'spiral horned grand slam'. in Taxonomy anarchy hampers conservation
Developments in taxonomy could see safari hunters killing 25 types of antelope, instead of the previous 9, to achieve the 'spiral horned grand slam'.
FIGURE A4 in Refined methods for estimating spirals and spiral deviations
FIGURE A4. Upper colossal squid beak with wavelet maxima and minima located on the hood. Circle and cross symbol denote the spiral axis. Inset shows the spiral deviations from the L2QL fit, with vertical lines for the center of spiral change and wavelet reconstruction with maxima (solid circles) and minima (open circles). Note the reversal of the inset horizontal scale to match the direction of growth from the rostral tip. See text for detail on wavelet scale and reconstruction.
FIGURE 6 in Refined methods for estimating spirals and spiral deviations
FIGURE 6. Patterns of spiral deviations with accretionary growth (arc length) for four spirals. Apart from the L1 spiral, deviation patterns are similar and have the same vertical scale. Vertical lines and shade (red) locate estimates of where changes in spiral shape occur on the outline.
FIGURE 4 in Refined methods for estimating spirals and spiral deviations
FIGURE 4. Nearest nine spirals to the LR-F1ventral valve outline, as ranked by similarity ratio on both local and global features. Spirals along axes are in approximate order of complexity. The green line represents agreement between local and global features.
FIGURE 5 in Refined methods for estimating spirals and spiral deviations
FIGURE 5. Reducing then increasing error (residual standard deviation) for different spirals fitted to the LR-F1 ventral valve. Absolute least error is not always the best spiral. See text for abbreviations and explanation.
FIGURE 2. Eleven spirals that are more complex than the simple logarithmic spiral, L1 in Refined methods for estimating spirals and spiral deviations
FIGURE 2. Eleven spirals that are more complex than the simple logarithmic spiral, L1 of Figure 1. Outlines are plotted on a logarithmic scale for radius against angle turned about the axis. Vertical lines show spirals with abrupt change, and shaded areas show regions of transitional change between log-piecewise spirals representing accretionary growth (see text for explanation and abbreviations).
FIGURE 1 in Refined methods for estimating spirals and spiral deviations
FIGURE 1. Accretionary growth (blue line) as an outline (A), and as a graph of log e (radius, r) against angle, θ, about an axis (cross symbol) (B). The intercept is the loge(radius) when θ = 0, and the constant slope defines the expansion of the L1 spiral.
FIGURE A1 in Refined methods for estimating spirals and spiral deviations
FIGURE A1. Photograph of a colossal squid upper beak. Arrows indicate two of the high points in undulations along the hood. Scale near the rostral tip is in mm.
FIGURE A3 in Refined methods for estimating spirals and spiral deviations
FIGURE A3. Scree plot of the reduction in error (residual standard deviation) for different spirals fitted to the upper beak of the colossal squid. Generalized transition spirals are denoted by the lowercase letter g.
Рис. 2. Типы раЗвитиЯ слепого отростка желудка у S. obscura, пиЩеварительнаЯ желеЗа удалена: A – тип 1, море Лаптевых, 74°34.9′ N, 115°43.4′ E (тот же ЭкЗемплЯр, что и на рисунке 1B); B – тип 2, Баренцево море, Югорский Шар (тот же ЭкЗемплЯр, что и на рисунке 1A); C, D – тип 3, море Лаптевых, 75°10.2′ N, 115°41.8′ E (тот же ЭкЗемплЯр, что и на рисунке 1C). Условные обо- ЗначениЯ: sc – слепой отросток желудка; dst – дистальный карман желудка. Линейка = 1 мм. in Variability of the spiral caecum in Solariella obscura (Vetigastropoda: Trochoidea: Solariellidae)
Рис. 2. Типы раЗвитиЯ слепого отростка желудка у S. obscura, пиЩеварительнаЯ желеЗа удалена: A – тип 1, море Лаптевых, 74°34.9′ N, 115°43.4′ E (тот же ЭкЗемплЯр, что и на рисунке 1B); B – тип 2, Баренцево море, Югорский Шар (тот же ЭкЗемплЯр, что и на рисунке 1A); C, D – тип 3, море Лаптевых, 75°10.2′ N, 115°41.8′ E (тот же ЭкЗемплЯр, что и на рисунке 1C). Условные обо- ЗначениЯ: sc – слепой отросток желудка; dst – дистальный карман желудка. Линейка = 1 мм.
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