3,665 research outputs found
FIGURE 1. Panus bambusinus-A in Two new combinations in the genus Panus (Panaceae, Polyporales) based on morphology and molecular phylogeny
No full textFIGURE 1. Panus bambusinus-A. Basidiomata (photo of dried herbarium specimen at ZGC, which is a part of the holotype at L) B. Generative hyphae showing clamp connection (arrow) C. Skeletal hyphae D. Hymenium with projecting gloeocystidia E, F, G. Gloeocystidia H. Cheilocystidia I. Pileipellis J. Basidiospores K. Basidiospore enlarged. Scale bars: A=20 mm, B, C=16 µm, D=26 µm, E, F, G=12 µm, H=18 µm, I=24 µm, J, K=6 µm. Photos by: Vinjusha N.Published as part of Arun Kumar, T. K., 2021, Two new combinations in the genus Panus (Panaceae, Polyporales) based on morphology and molecular phylogeny, pp. 287-294 in Phytotaxa 514 (3) on page 290, DOI: 10.11646/phytotaxa.514.3.8, http://zenodo.org/record/531627
FIGURE 4 in Indigofera himachalensis (Fabaceae: Indigofereae), a new species from Himachal Pradesh, India
No full textFIGURE 4. Indigofera himachalensis (from Chauhan & Pandey 5011) A. Habit, B. Leaflet (leftside)-abaxial, (rightside)-adaxial C. Standard, D. Wings, E. Keel, F. Calyx with gynoecium, G. Pod, H. Seed. Drawn by V. Chauhan.Published as part of Chauhan, Vibha, Pandey, Arun K. & Schaefer, Hanno, 2013, Indigofera himachalensis (Fabaceae: Indigofereae), a new species from Himachal Pradesh, India, pp. 43-49 in Phytotaxa 112 (2) on page 48, DOI: 10.11646/phytotaxa.112.2.2, http://zenodo.org/record/507885
CORPORATE GOVERNANCE AND CAPITAL MARKETS: A CONCEPTUAL FRAMEWORK
No full textThis paper outlines a conceptual framework of the relationship between corporate governance and two important determinants of capital market development namely, a firm’s access to finance, and its financial performance. The framework assumes that a firm’s corporate governance is simultaneously determined by a group of related governance components and other firm characteristics. Whilst the capital markets play a crucial role in enhancing corporate governance standards, the effectiveness and credibility of such effort might be constrained by poor firm-level corporate governance. Moreover, the cause and effect relationship can work in the opposite direction e.g. firm-level corporate governance quality can enhance both the firm’s ability to gain access to finance and its financial performance, which eventually lead to capital market development. The framework is primarily based on the economic approaches to corporate governance, although it recognises part of the assumptions of the stakeholder theory and the political economy aspects of corporate governance
FIGURE 1. Chordodes combiareolatus n in Chordodes combiareolatus, a new species of horsehair worms (Nematomorpha) from Nagaland, India, with further comments on Chordodes moutoni
No full textFIGURE 1. Chordodes combiareolatus n. sp. A. Cuticle in mid-body region with simple areoles (sar) and tubercle areoles (tuar), showing also the cuticular surface between areoles. B. Tubercle areole with strongly displaced tubercle. C. Thorn areole (thar). D. Position of crowned areole clusters on lateral body sides (encircled) and of crowned areole clusters with long filaments along the ventral midline (arrows). E. Crowned areole cluster composed of a pair of crowned areoles (crar) and surrounding circumcluster areoles (ccar). F. Overview showing the mixed occurrence of crowned areole clusters (encircled) and clusters with a flat central surface (dotted circles). G. Magnification of a cluster with a flat central surface.Published as part of Schmidt-Rhaesa, Andreas & Yadav, Arun K., 2015, Chordodes combiareolatus, a new species of horsehair worms (Nematomorpha) from Nagaland, India, with further comments on Chordodes moutoni, pp. 202-210 in Zootaxa 3925 (2) on page 204, DOI: 10.11646/zootaxa.3925.2.3, http://zenodo.org/record/23735
Ready-to-use post-Newtonian gravitational waveforms for binary black holes with nonprecessing spins: An update
No full textInternational audienceFor black-hole binaries whose spins are (anti-) aligned with respect to the orbital angular momentum of the binary, we compute the frequency-domain phasing coefficients including the quadratic-in-spin terms up to the third post-Newtonian (3PN) order, the cubic-in-spin terms at the leading order, 3.5PN, and the spin-orbit effects up to the 4PN order. In addition, we obtain the 2PN spin contributions to the amplitude of the frequency-domain gravitational waveforms for nonprecessing binaries, using recently derived expressions for the time-domain polarization amplitudes of binaries with generic spins, complete at that accuracy level. These two results are updates to [K. G. Arun, A. Buonanno, G. Faye, and E. Ochsner, Phys. Rev. D 79, 104023 (2009).] for amplitude and [M. Wade, J. D. E. Creighton, E. Ochsner, and A. B. Nielsen, Phys. Rev. D 88, 083002 (2013).] for phasing. They should be useful for constructing banks of templates that accurately model nonprecessing inspiraling binaries, for parameter estimation studies, and for constructing analytical template families that account for the inspiral-merger-ringdown phases of the binary
Constraints on the binary black hole nature of GW151226 and GW170608 from the measurement of spin-induced quadrupole moments
No full textAccording to the "no-hair" conjecture, a Kerr black hole (BH) is completely described by its mass and spin. In particular, the spin-induced quadrupole moment of a Kerr BH with mass and dimensionless spin can be written as , where . Thus by measuring the spin-induced quadrupole parameter , we can test the binary black hole nature of compact binaries and distinguish them from binaries comprised of other exotic compact objects, as proposed in [N. V. Krishnendu et al., PRL 119, 091101 (2017)]. Here, we present a Bayesian framework to carry out this test where we measure the symmetric combination of individual spin-induced quadrupole moment parameters fixing the anti-symmetric combination to be zero. The analysis is restricted to the inspiral part of the signal as the spin-induced deformations are not modeled in the post-inspiral regime. We perform detailed simulations to investigate the applicability of this method for compact binaries of different masses and spins and also explore various degeneracies in the parameter space which can affect this test. We then apply this method to the gravitational wave events, GW151226 and GW170608 detected during the first and second observing runs of Advanced LIGO and Advanced Virgo detectors. We find the two events to be consistent with binary black hole mergers in general relativity. By combining information from several more of such events in future, this method can be used to set constraints on the black hole nature of the population of compact binaries that are detected by the Advanced LIGO and Advanced Virgo detectors
Embelia villosa Wallich 1824
No full text7. Embelia villosa Wallich (1824: 289) Lectotype (designated here):— INDIA, Jharkhand, Rajmahal hills, 1823, Wallich Cat. No. 2313 (K, K001115624!); isolectotype: (G, G00138770!). Fig. 4 Wallich (1824) described this species based on Roxburgh’s collection. This species was introduced into the Botanic garden along with E. robusta by Roxburgh (Wallich 1824). Major collections of Wallich are now deposited at K herbarium (Stafleu & Cowan 1988). Our search in K resulted in finding an HBC specimen with Wallich catalogue no. 2313, which is cited in the protologue. The specimen (K001115624) from K has two species of Embelia mounted on a single sheet, on top with E. villosa (three flowering twigs) and at bottom a single reproductive twig of E. ribes. Additionally, we could trace one more specimen deposited in G herbarium which is annotated as isotype on the sheet with Wallich catalogue no. 2313 and both the specimens are matching with the protologue. Hence, here we designate the specimen with barcode K001115624 available at K herbarium as lectotype.Published as part of Prasanth, Arun & Sardesai, Milind M., 2021, Nomenclatural notes on type materials of eight names in Embelia (Primulaceae) from Peninsular India, pp. 230-238 in Phytotaxa 491 (3) on page 237, DOI: 10.11646/phytotaxa.491.3.3, http://zenodo.org/record/575443
Frequency Dependence Effective Refractive Index of Meta–Materials by Effective Medium Theory
No full textIn this present communication we studied the frequency dependenceof the effective electromagnetic parameters of left-handed and relatedmeta-materials (NIMs) of the split ring resonator (SRR) and wire type.By varying the width of inserted material as well as the host material,we also calculate the effective parameters of NIM like effectivepermittivity and effective permeability. Using these parameters, wecalculate the effective refractive index and impedance of theconsidered medium. Our results reveal that the negative index ofmaterials can be achieved when the thickness of the host materialsshould equal to the thickness of the inserted materials
C Nanorods‐Embedded Nanocages Assemblies for Efficient Photocatalytic Hydrogen Generation
No full textCocatalyst materials can promote the separation of photogenerated electron-hole pairs and accelerate the catalytically active sites of semiconductor photocatalysts. However, it is critical to make low-cost, noble-metal-free materials with high catalytic reactivity, yet this task is extremely difficult to do. Herein, an effective photocatalytic hydrogen generation process has been developed using N-doped Fe3C (N-Fe3C) nanocages adorned with ultrathin ZnIn2S4 nanosheets produced from a dual metal organic framework. In addition, the highly porous hybrid structure developed gives a large number of active sites for catalytic reduction events, and light scattering can be used to better capture visible light. Due to their improved solar-driven hydrogen evolution rate (9,600 mu mol h(-1) g(-1)) and apparent quantum efficiency (3.6 %), these structures are superior to those of Pt noble-metal co-catalytic systems and ZnIn2S4-based nanohybrids, which were previously reported.
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