40,808 research outputs found
Keteiodoros Strusz & Percival & Wright & Pickett & Byrnes 1998, n.gen.
No full textKeteiodoros n.gen. Type species. Keteiodoros bellense n.sp. Wenlock, New South Wales. No other species are presently known. Derivation of name. Greek XTl1:£LOS = sea-monstrous + oop6s= leather bag; neuter gender. The name is an allusion to original environment, size, and resemblance to an ovoid football. Diagnosis. Very large and strongly equibiconvex trimerellide brachiopod, each valve with deeply excavated steep-sided platform supported by long median septum; deep umbonal cavities in ventral valve; ventral umbo long, incurved; dorsal umbo strongly incurved, bulbous, fitting against posterior end of ventral platform; long thick longitudinally and transversely curved articulating plate more or less concentric with umbo, extending from dorsal beak almost to surface of ventral platform; valve margins slightly overlapping dorsoventrally in front of flattened zones which served as articulation pivots. Discussion. Because of the unusual morphology of this form, discussion of its relationships follows the specific description.Published as part of Strusz, D. L., Percival, Ian G., Wright, A. J., Pickett, John W. & Byrnes, A., 1998, A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia, pp. 171-186 in Records of the Australian Museum 50 (2) on page 176, DOI: 10.3853/j.0067-1975.50.1998.1278, http://zenodo.org/record/465297
A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia
No full textFigure 12. A-B, oblique views of the shell exterior (A) and interior (B) of Keteiodoros bellense n.sp., reconstructed from the complete paratype AM FI01117 (Fig. 4) and serially sectioned paratype CPC 34409 (Fig. 6), and modified after the holotype (Fig. 7) and the silicified dorsal valve, paratype MMF 33366 (Fig. 10); 2 cm scale bars. In B, the open valves have been truncated anteriorly to show their cross-sections, while the dorsal valve has been strongly rotated, and lifted vertically above the ventral valve, to show its interior; the inferred position of the "hinge" line is shown as a dashed line.Published as part of Strusz, D. L., Percival, Ian G., Wright, A. J., Pickett, John W. & Byrnes, A., 1998, A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia, pp. 171-186 in Records of the Australian Museum 50 (2) on page 184, DOI: 10.3853/j.0067-1975.50.1998.1278, http://zenodo.org/record/465297
Figure 4. A-E in A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia
No full textFigure 4. A-E-the only well preserved nearly complete (although somewhat worn) shell, paratype AM FlOll17. A-dorsal view; B-E-lateral, ventral, anterior and posterior views (dorsal valve uppermost in D and E); 2 cm scale bars. The anterior edges of the valves are slightly damaged (E); the rapid development of the ventral sulcus near the anterior margin is clearly visible in C and E, while B shows the relationship of the valve margins behind and in front of the pivot zone.Published as part of Strusz, D. L., Percival, Ian G., Wright, A. J., Pickett, John W. & Byrnes, A., 1998, A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia, pp. 171-186 in Records of the Australian Museum 50 (2) on page 177, DOI: 10.3853/j.0067-1975.50.1998.1278, http://zenodo.org/record/465297
Figure 9. Paratype MMF 33365, a in A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia
No full textFigure 9. Paratype MMF 33365, a silicified fragment of a dorsal umbo, in approximately ventral (top) and lateral (bottom) aspects; 1 cm scale bar. Note the distinct asymmetry of the sharp incurved beak (apical angle 110°, directed right-ventrally at about 60° to the commissure), and the tracks of the bottom edges of the dorsal platform. Only the proximal part of the articulating plate is preserved, but its relationship to the beak is clear. The flat-bottomed ridged channel between beak and plate (compare Figs. 8, 10) we interpret as the site of diductor attachment.Published as part of Strusz, D. L., Percival, Ian G., Wright, A. J., Pickett, John W. & Byrnes, A., 1998, A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia, pp. 171-186 in Records of the Australian Museum 50 (2) on page 182, DOI: 10.3853/j.0067-1975.50.1998.1278, http://zenodo.org/record/465297
Figure 13 in A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia
No full textFigure 13. Reconstructed axial longitudinal section of a shell, with the inferred positions of the adductor and diductor muscles projected onto that plane. A dashed line gives the dorsal valve in open position, showing the minimum amount of gape possible under this scheme. Based on the serially sectioned shell, which has been used to project the axis of rotation of the dorsal valve from its inferred position at the valve margins, and on the longitudinal section of AM FlO1l21 (Fig. llA).Published as part of Strusz, D. L., Percival, Ian G., Wright, A. J., Pickett, John W. & Byrnes, A., 1998, A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia, pp. 171-186 in Records of the Australian Museum 50 (2) on page 185, DOI: 10.3853/j.0067-1975.50.1998.1278, http://zenodo.org/record/465297
Figure 8. A peel taken from a in A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia
No full textFigure 8. A peel taken from a transverse serial section of paratype MMF 33364, at 60.3 mm from the posterior end; 1 cm scale bar. The swollen articulating plate (arrowed), and the slots it conceals (which we interpret as locations of diductor attachment), are clearly visible in the centre of the photograph, as is the trace of the dorsal platform. At right can be seen the relationship between the valve margins at the pivot zone. Note the heavy but irregular recrystallisation.Published as part of Strusz, D. L., Percival, Ian G., Wright, A. J., Pickett, John W. & Byrnes, A., 1998, A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia, pp. 171-186 in Records of the Australian Museum 50 (2) on page 181, DOI: 10.3853/j.0067-1975.50.1998.1278, http://zenodo.org/record/465297
Figure 5. Incomplete large shell, paratype CPC 34408 in A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia
No full textFigure 5. Incomplete large shell, paratype CPC 34408; 2 cm scale bar. The exterior of the ventral valve displays growth lines where adhering sediment has been mechanically removed, and anteriorly a broad very shallow sulcus. The side view shows the shell in inferred life position; the preserved part of the shell was probably below the sediment-water interface, and so protected from storm damage by the surrounding sediment. The restricted space between ventral and dorsal umbos is evidence for the severe limit imposed on the angle of gape.Published as part of Strusz, D. L., Percival, Ian G., Wright, A. J., Pickett, John W. & Byrnes, A., 1998, A giant new trimerellide brachiopod from the Wenlock (Early Silurian) of New South Wales, Australia, pp. 171-186 in Records of the Australian Museum 50 (2) on page 178, DOI: 10.3853/j.0067-1975.50.1998.1278, http://zenodo.org/record/465297
Measurement of the branching fractions for B--> D(*)+pi(-)l(-)(nu)over-bar(l) and (B)over-bar(0)-> D-(*)0 pi(+)l(-)(nu)over-bar(l)
No full textWe report on a measurement of the branching fractions for B- --> D(*)+ pi(-)l(-)(nu) over bar (l) and (B) over bar (0) --> D-(*)0 pi(+)l(-)(nu) over bar (l) with 275 x 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at KEKB. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We obtain B(B- --> D(+)pi(-)l(-)(nu) over bar (l)) = (0.54 +/- 0.07 (stat) +/- 0.07(syst) +/- 0.06(BR)) x 10(-2), B(B- --> D*+pi(-) l(-) (nu) over bar (l)) (0.67 +/- 0.11 (stat) +/- 0.09(syst) +/- 0.03(BR)) x 10(-2), B((B) over bar (0) --> D(0)pi(+)l(-) (nu) over bar (l)) = (0.33 +/- 0.06(stat) +/- 0.06(syst) +/- 0.03(BR)) x 10(-2), B((B) over bar (0) -->D(*0)pi(+)l(-)(nu) over bar (l)) = (0.65 +/- 0.12(stat) +/- 0.08(syst) +/- 0.05(BR)) x 10(-2), where the third error comes from the error on (B) over bar --> D((*))l(-)(nu) over bar (l) decays. Contributions from B-0 --> D(*+)l(-)(nu) over bar (l) decays are excluded in the measurement of (B) over bar (0) --> D(0)pi(+)l-(nu) over bar (l).Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)0ARTICLE5null7
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Logarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
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