11,236 research outputs found
Scandarma splendidum Naruse and Ng 2007
No full textScandarma splendidum Naruse and Ng, 2007 Scandarma splendidum Naruse and Ng, 2007, p. 337, figs 1–3 [type locality: Bako National Park, Sarawak, Malaysia]; Ng et al. 2008a, p. 223; Lai and Olesen 2016, p. 72. Material examined Holotype. ZRC 2002.0265, 1 male, 19.1 × 18.5 mm, Bako National Park, Sarawak, Malaysia, 15 March 2002. Paratypes. ZRC 2007.0102, 2 males, 18.0 × 20.0, 18.1 × 19.1 mm, Bako National Park, Sarawak, Malaysia, 13 September 2001. Others. ZRC 2011.1013, 2 males, 10.2 × 11.3, 15.4 × 16.9 mm, 2 females, 11.8 × 12.8, 12.2 × 13.1 mm, Bako, Sarawak, Borneo, coll. May 2002; RUMF-ZC-4985, 1 male, 16.6 × 18.3 mm, 1 female, 11.8 × 12.9 mm, same as ZRC 2011.1013. Diagnosis Carapace squarish, external orbital angle triangular, lateral margins slightly convex; 2 pairs of postfrontal lobes present, lateral lobes slightly exceeding mesial lobes anteriorly; anterior margins of all lobes far from frontal margin in dorsal view. Palm of male chela swollen; outer surface granulated, granules smaller on lower part, with small median protuberance on proximal part of smooth sloping area around bases of fingers; upper surface with 1 straight, longitudinally traversing row of densely packed small granules, and with several short, oblique rows on inner side. Immovable finger almost straight, gradually tapering towards tip, occlusal margin lacking marked proximal elevation, lined with small teeth on proximal two-fifths, 1 large tooth submedially, followed distally by 2 or 3 smaller teeth, subdistally with 1 large tooth and 1 low tooth; lower margin with irregular row of small teeth. Movable finger curved downwards; occlusal margin lined with 2 proximal teeth, followed distally by small teeth, and 1 subdistal tooth; inner side of upper margin with regularly lined rounded granules, these granules indistinct distally. Subdistal tooth of movable finger fitting between 2 subdistal teeth of immovable finger when closed. Male pleonal somite 3 widest, somite 4 abruptly narrowed distally, lateral margins of somites 3–5 clearly concave. G1 short, almost straight, stout, narrowed medially, distal end with anterolaterally directed narrow corneous process. Vulvae located on distal two-fifths of sternite 6, anterior margin adjacent to thoracic sternal suture 5/6, ellipsoidal, margin rimmed posteriorly, sternal vulval cover developed from posterolateral corner, covering almost entire vulva, except for anteromesial hole, cover produced ventroanteriorly as trigonal pyramid structure. Colouration In life, anterior half of carapace (suborbital to pterygostomial regions and frontal to epibranchial regions), chelipeds and third maxillipeds reddish, gradually changing from darker anterior inner parts (chelae and third maxillipeds) to orange posterior outer parts. Posterior half of dorsal surface of carapace varying from cream to dark khaki mixed with dark purple patterns. Ambulatory legs dark purple. See Naruse and Ng (2007, p. 338, fig. 1). Distribution Known only from Sarawak, Malaysia [type locality: Bako National Park] (Naruse and Ng 2007). Remarks Scandarma splendidum is morphologically closest to Sc. raymondi. Among the five diagnostic characters listed by Ng (2013, p. 293), the distal corneous part of the G1 was described as being relatively wider in Sc. raymondi than in Sc. splendidum. A reexamination of the present material, however, shows that the comparative characters were inadvertently transposed by Ng (2013) and that Sc. splendidum is actually the one with a proportionately wider distal corneous part of the G1. Ecological note Naruse and Ng (2007, p. 338) reported that Sc. splendidum was nocturnal and observed on plants to a height of 2 m near streams or puddles, and sometimes found up to 10 m from any water source. They also commented that the ecology and behaviour of Sc. splendidum are similar to those of Sc. lintou in most aspects.Published as part of Naruse, Tohru & Ng, Peter K. L., 2020, Revision of the sesarmid crab genera Labuanium Serène and Soh, 1970, Scandarma Schubart, Liu and Cuesta, 2003 and Namlacium Serène and Soh, 1970 (Crustacea: Decapoda: Brachyura: Sesarmidae), with descriptions of four new genera and two new species, pp. 445-532 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 54 (7 - 8) on pages 497-498, DOI: 10.1080/00222933.2020.1763491, http://zenodo.org/record/460914
Open Access 2012: achievements, further steps, and obstacles. An interview with Stevan Harnad
No full textOn the occasion of Open Access Week (22-28 October) I had a talk with Stevan Harnad, a pioneer and one of the world’s best-known Open Access advocates, author of the Subversive proposal (1994-1995) which triggered the whole movement. Professor Harnad highlights achievements, further steps, and obstacles ten years after the Open Access manifesto of the Budapest Open Access Initiative
SC author and illustrator Kate Salley Palmer signing book
No full textPhotograph of SC author and illustrator Kate Salley Palmer signing boo
Frequency-Domain Turbo Equalisation in Coded SC-FDMA Systems: EXIT Chart Analysis and Performance
No full textIn this paper, we investigate the achievable performance of channel coded single-carrier frequency division multiple-access (SC-FDMA) systems employing various detection schemes, when communicating over frequency-selective fading channels. Specifically, three types of minimum mean-square error (MMSE) based frequency-domain (FD) turbo equalisers are considered. The first one is the turbo FD linear equaliser (LE). The second one is a parallel interference cancellation (PIC)-assisted turbo FD decision-feedback equaliser (DFE). The final one is the proposed hybrid interference cancellation (HIC)-aided turbo FD-DFE, which combines successive interference cancellation (SIC) with iterative PIC and decoding. The benefit of interference cancellation (IC) is analysed with the EXtrinsic Information Transfer (EXIT) charts. The performance of the coded SC-FDMA systems employing the above-mentioned detection schemes is investigated with the aid of simulations. Our studies show that the IC techniques achieve an attractive performance at a moderate complexity
Book signing by SC author and illustrator Kate Salley Palmer
No full textPhotograph of Book signing by SC author and illustrator Kate Salley Palme
Projeto de viabilidade econômico-financeira para a implementação de um laboratório de analises clínicas no município de Florianópolis / SC.
No full textTCC (graduação) - Universidade Federal de Santa Catarina, Centro Sócio Econômico, Curso de Administração.O presente estudo concentra-se na área da Administração Geral e na do Empreendedorismo e tem como objetivo averiguar a viabilidade econômico financeira da implementação de um laboratório de análises clinicas no município de Florianópolis / SC. O estudo foi classificado, quanto aos fins, como pesquisa de caráter exploratório-descritivo predominantemente qualitativo e quanto aos meios, como pesquisa bibliográfica e de campo. Para a pesquisa de campo, utilizou-se a amostragem por acessibilidade e tipicidade do método não probabilística. Dita pesquisa, possibilitou identificar os principais concorrentes, bem como seus pontos fortes e fracos. Para o alcance dos objetivos propostos, o estudo constitui-se na elaboração de um Projeto de Negócios (PN) onde foram identificados os aspectos mercadológicos, os recursos materiais, humanos, tecnológicos e financeiros necessários ao empreendimento, bem como, observados os aspectos legais inerentes ao setor de atuação. Após isso, procedeu-se à análise financeira. Para tanto, calculou-se o ponto de equilíbrio, o período de retorno do investimento, o valor presente liquido, a taxa interna de retorno, o índice de lucratividade e a taxa de rentabilidade. Adicionalmente, fez-se a projeção do fluxo de caixa e definiu-se a taxa mínima de atratividade do empreendimento. Desta forma, após ter realizado a análise da pesquisa e a análise financeira, conclui-se pela viabilidade do empreendimento
Scandarma finni Naruse & Ng 2020, comb. nov.
No full text<i>Scandarma finni</i> (Alcock, 1900), comb. nov. <p>(Figure 25)</p> <p> <i>Sesarma finni</i> Alcock, 1900, p. 424 [type locality: Andamans]; Alcock and McArdle 1903, pl. 66, fig. 1.</p> <p> <i>Sesarma</i> (<i>Sesarma</i>) <i>finni</i>: Tesch 1917, p. 154.</p> <p> <i>Labuanium finni</i>: Serène and Soh 1970, p. 402; Ng et al. 2008a, p. 221.</p> <p> <i>Material examined</i></p> <p> <i>Holotype.</i> ZSI, female, 11.0 × 11.0 mm, Andamans (photographs examined).</p> <p> <i>Diagnosis</i></p> <p>Carapace subsquarish, external orbital angle blunt, lateral margins slightly divergent posteriorly, with 2 rudimentary epibranchial teeth; 2 pairs of postfrontal lobes present, lateral lobes slightly exceeding mesial lobes anteriorly; anterior margins of all lobes relatively close to but never reaching frontal margin in dorsal view. The male chela, male pleon and G1 are unknown.</p> <p> <i>Distribution</i></p> <p>The only confirmed locality is the Andamans [type locality].</p> <p> <i>Remarks</i></p> <p> <i>Sesarma</i> (<i>Sesarma</i>) <i>finni</i> was described based on a juvenile female specimen (11 × 11 mm) from the Andamans (Figure 25; photographs of the holotype kindly provided by Santanu Mitra, ZSI). Alcock and McArdle (1903, pl. 66, fig. 1) subsequently published a drawing of <i>Se</i>. (<i>Se</i>.) <i>finni</i> without locality but citing Alcock (1900) in the legend of the figure. Since Alcock and McArdle’s (1903) drawing appears similar to <i>Se. gracilipes</i>, records of <i>Se. gracilipes</i> from the eastern Indian Ocean are probably best referred to <i>Sc. finni</i>. Records of ‘ <i>Sesarma gracilipes</i> ’ from the eastern Indian Ocean include Nicobars (Heller 1865), Atjeh (De Man 1895) and Nias (Tesch 1917), and they neither described in detail nor figured the specimens. Crosnier (1965, p. 59) synonymised <i>Se. finni</i> under <i>Se. gracilipes</i>, but it was treated as a valid species in Ng et al. (2008a).</p> <p> The generic position of <i>Sc. finni</i> is uncertain, as taxonomically diagnostic large male characters, such as major chela, pleon and G1, are not available. Our comparison of the photograph of the holotype of <i>Sc. finni</i> (Figure 25) with similar-sized specimens of morphologically similar species (<i>Sc. lintou, Sc. gracilipes, Sc. papua</i> and <i>Sc. malagasy</i>; Figures 17, 26) indicated that they can be distinguished from each other by different combination of carapace characters (Table 4). <i>Scandarma finni</i> is at least different from other <i>Scandarma</i> species and here tentatively placed in <i>Scandarma</i> as a valid species for now.</p> <p> Pretzmann (1984, p. 142, pl. 2, figs 6–8) recorded ‘ <i>Labuanium finni</i> ’ from the South Andaman Islands. But it clearly differs from <i>Sc. finni</i> s.s. and is here referred to <i>Andamanium thelxinoe</i> (De Man, 1908), comb. nov. (see below).</p>Published as part of <i>Naruse, Tohru & Ng, Peter K. L., 2020, Revision of the sesarmid crab genera Labuanium Serène and Soh, 1970, Scandarma Schubart, Liu and Cuesta, 2003 and Namlacium Serène and Soh, 1970 (Crustacea: Decapoda: Brachyura: Sesarmidae), with descriptions of four new genera and two new species, pp. 445-532 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 54 (7 - 8)</i> on pages 492-493, DOI: 10.1080/00222933.2020.1763491, <a href="http://zenodo.org/record/4609148">http://zenodo.org/record/4609148</a>
High-resolution clean-sc
No full textIn this paper a high-resolution extension of CLEAN-SC is proposed: HR-CLEAN-SC. Where CLEAN-SC uses peak sources in “dirty maps” to define so-called source components, HR-CLEAN-SC takes advantage of the fact that source components can likewise be derived from points at some distance from the peak, as long as these “source markers” are on the main lobe of the Point Spread Function (PSF). This is very useful when sources are closely spaced together, such that their PSFs interfere. Then, alternative markers can be sought in which the relative influence by PSFs of other source positions is minimised. For those markers the source components better agree with the actual sources, which allows for better estimation of their locations and strengths. This paper outlines the theory needed to understand this approach and discusses applications to 2D and 3D microphone array simulations with closely spaced sources
SC author and illustrator Kate Salley Palmer talking to event attendees
No full textPhotograph of SC author and illustrator Kate Salley Palmer talking to Rita Lewi
Ca-modified Al–Mg–Sc alloy with high strength at elevated temperatures due to a hierarchical microstructure
No full textAl-Mg alloys are normally prone to lose part of their yield and tensile strength at high temperatures due to insufficient thermal stability of the microstructure. Here, we present a Ca-modified Al–Mg–Sc alloy demonstrating high strength at elevated temperatures. The microstructure contains Al4Ca phases distributed as a network along the grain boundary and Al3(Sc,Zr) nano-particles dispersed within the grains. The microstructure evolution and age-hardening analysis indicate that the combination of an Al4Ca network and Sc-rich nano-particles leads to excellent thermal stability even upon aging at 300 °C. The tensile strength of the alloy for temperatures up to 250 °C is significantly improved by an aging treatment and is comparable with the commercial heat-resistant aluminum alloys, i.e., A356 and A319. At a high temperature of 300 °C, the tensile strength is superior to the above-mentioned commercial alloys, even more so when expressed as the specific strength due to the low density of Ca-modified Al–Mg–Sc alloy. The excellent high-temperature strength results from a synergistic effect of solid solution strengthening, grain boundary strengthening and nanoparticle order strengthening.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Novel Aerospace Material
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