30 research outputs found
Curtara Labata
No full textKey to the species of <i>Curtara</i> (<i>Labata</i>) <p> 1. Dorsoapical spine more than 0.5 x the length of pygofer; basal aedeagal processes apically branched.............................................................................................................................................. <i>C</i>. <i>ushima</i> sp.nov. (Mato Grosso, Brazil)</p> <p>1’. Dorsoapical spine less than 0.5 x the length of pygofer; basal aedeagal processes apically unbranched.................... 2</p> <p> 2. Style with a short pointed enlargement on ventral margin................. <i>C</i>. <i>xingua</i> DeLong, 1980 (Mato Grosso, Brazil)</p> <p> 2’. Style without pointed enlargement on ventral margin........ <i>C</i>. <i>basala</i> DeLong & Triplehorn, 1978 (Chaco, Paraguay)</p>Published as part of <i>Coelho, Luci Boa Nova & Da-Silva, Elidiomar Ribeiro, 2012, A new species of Curtara DeLong & Freytag (Insecta: Hemiptera: Cicadellidae) from Middle Western Brazil, pp. 77-80 in Zootaxa 3478</i> on page 80, DOI: <a href="http://zenodo.org/record/210114">10.5281/zenodo.210114</a>
Curtara (Labata) ushima Coelho & Da-Silva, 2012, sp.nov.
No full text<i>Curtara</i> (<i>Labata</i>) <i>ushima</i> sp.nov. <p>(Figs 1–8)</p> <p>Length of male 9 mm. General color pale brown with small brown spots. Crown twice as wide between eyes at base as median length; anterior margin rounded, slightly upturned at middle. Crown with median brown spot near anterior margin; coronal suture brown, not reaching anterior margin; three yellow spots near anterior margin, one nearest median brown spot, two nearest proximal eye; posterior margin with three small spots between median line and eye, one yellow, one dark-brown and another yellow. Eyes reddish-brown. Ocelli red, closer to median line than to adjacent eye. Pronotum with maximum width about twice median length; small dark-brown spot near anterior margin each side of median line; anterolateral area yellowish with irregular brown spots. Scutellum with small brown spot on each side of median line. Forewing beige with row of small brown spots, veins reddish-brown; apical cells with marginal dark-brown spots, vein CuA2 dark-brown; veins AA and AP with apical dark-brown spot, transverse vein of m cell spotted with darkbrown; base of appendix dark-brown, apical region suffused with brown. Hind wings with dark-brown veins.</p> <p>Male genitalia. Subgenital plate about 3.5 times as long as broad, apex broadly rounded. Pygofer narrowed apically, somewhat triangular in shape (lateral view), bearing apical long slender dorsally directed spine about 1/2 length of pygofer. Style long, slender, narrowed on apical half, with short pointed enlargement on ventral margin at 3/4 length of blade; apex dorsally bent and pointed; small and delicate setae irregularly distributed from basal lobe to pre-apical area. Connective with main stem short and narrow, with lateral arms forming transverse plate, proportionally more robust. Aedeagus with rather slender shaft, broadened apically (ventral view), bearing pair of divergent retrorse apical processes, processes about 1/4 length of shaft; basal portion dorsally recurved, forming broad and flattened plate bearing pair of dorsally directed, distally branched processes, bases of processes fused medially; basal plate with pair of membranous expansions from anterolateral region parallel to shaft, medially linked to internal wall of the genital capsule and apically hood-like, bearing microsetae.</p> <p>Type material. Holotype male, BRASIL, Mato Grosso: Manso (Usina Hidrelétrica de Manso), 25/i/1988, J.L.Nessimian leg. (deposited in “Coleção Entomológica José Alfredo Pinheiro Dutra”, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil).</p> <p> Comments. <i>Curtara ushima</i> sp.nov. is quite similar to <i>C. xingua</i> (DeLong 1980), except for the longer pygofer spine, the apically branched basal aedeagal processes, and the presence of distal aedeagal processes. In relation to <i>C. basala</i> (DeLong & Triplehorn 1978), <i>C. ushima</i> sp.nov. is distinguished by the longer dorsally directed spine of the pygofer, the more rounded apex of the subgenital plate, the blunt apex of the style, and the apically branched basal aedeagal processes.</p> <p> The type-locality of <i>C. ushima</i> sp.nov. is situated in a hot equatorial and tropical climatic area, with slight seasonal temperature variation (IBGE 1989), alternating between a wet season (from October /November to April) and a dry season (from May to September/October). The average annual temperature is 21ºC to 26 ºC, and corresponds to a Köppen classification of tropical savanna (Aw) (Neto <i>et al</i>. 1993; Andrade <i>et al</i>. 2008). In this region, savanna zones predominate, with large areas in which pasture and annual crops prevail (Andrade <i>et al</i>. 2008). Geographically, the typelocality of <i>C. ushima</i> sp.nov. is approximately halfway between <i>C</i>. <i>xingua</i> (Xingu, Mato Grosso State, Brazil) and <i>C</i>. <i>basala</i> (Chaco, Paraguay) localities (Fig. 9), which have similar climatic and vegetation characteristics.</p>Published as part of <i>Coelho, Luci Boa Nova & Da-Silva, Elidiomar Ribeiro, 2012, A new species of Curtara DeLong & Freytag (Insecta: Hemiptera: Cicadellidae) from Middle Western Brazil, pp. 77-80 in Zootaxa 3478</i> on pages 77-79, DOI: <a href="http://zenodo.org/record/210114">10.5281/zenodo.210114</a>
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Promoting Energy Sustainability through Fundamental Study of Precious Metal Catalysts for Fuel Cells and Electrolyzers
No full textClean and efficient energy technologies are in high demand to resolve the issues related to limited fossil fuels and the climate crisis. Recently, electrochemical conversion devices, such as fuel cells and electrolyzers, demonstrate a viable option for a sustainable energy system. Electrolyzers can generate green hydrogen through water electrolysis, which can then be used in fuel cells to directly convert chemical energy to electricity. However, there are still technical barriers that need to be addressed before reaching full commercialization in these emerging technologies. For fuel cells, especially in heavy-duty vehicle applications, durability is a critical concern to be competitive with internal combustion engines. One of the key degradation losses in fuel cells comes from the catalyst layer made of platinum nanoparticles dispersed on carbon support (Pt/C). Here, a fundamental study was conducted to investigate the degradation mechanism of Pt/C using accelerated durability testing protocols in acidic and alkaline media. It was found that the generation of carboxyl functional groups due to carbon corrosion in acid poisons the Pt active sites during oxygen reduction reaction (ORR). In alkaline, carbon dissolution happens that triggers the formation of large Pt agglomerates. For electrolyzers, hydrogen generation relies on an expensive and scarce iridium metal as a catalyst for the oxygen evolution reaction (OER). To lower the cost of this device, alternative materials are developed to reduce the iridium (Ir) loading. We proposed to enhance Ir utilization by alloying with cobalt (Co), being a less expensive and more available metal. Surfactant-assisted Adam’s fusion synthesis technique was developed as a scalable method to produce IrCo catalysts. The synthesized material outperforms commercial Ir baseline catalysts, in both acidic and alkaline media. In addition, the effects of the Ir/Co molar ratio, the use of surfactant, and acid etching were investigated to enhance OER performance. In this dissertation, the catalytic performance and degradation mechanisms of precious metals for ORR and OER in both acid and alkaline media were successfully studied using a half-cell electrochemical set-up and physicochemical characterization tools. The new findings provide insights into developing more efficient and durable fuel cells and electrolyzers to promote energy sustainability toward a decarbonized society
Sistemas Complejos: Estudio de modelos para la distribución del dinero
No full textEl presente trabajo estudia modelos sobre la distribución del dinero entre la población y los diferentes factores que le afectan. Se recopilan para ello algunos trabajos esenciales sobre la materia desarrollados tanto por matemáticos como por físicos y se respaldan con simulaciones numéricas que corroboran lo mencionado. Todo ello intentando seguir un orden cronológico que nos permite ver el desarrollo del campo que nos concierne, la econofísica. Tras una breve introducción histórica introduciremos un primer modelo básico, el cual analizaremos de formas distintas, para luego comenzar a introducir modificaciones sobre este. De esta manera, conseguiremos modelizar situaciones más concretas de la vida cotidiana o incluso introducir la posibilidad de préstamos de dinero entre la población. Cabe destacar que de las tres principales distribuciones sobre las que se centra la econofísica, dinero, salarios y riqueza, únicamente nos centraremos en la primera y pese a que parece que hacen referencia a elementos similares, no todos los resultados válidos para un tipo de distribuciones son válidos para otros. De esta forma, los resultados aquí recogidos no deben ser extrapolados a las otras distribuciones sin justificación previa. La mayoría de los cálculos se desarrollarán en el propio trabajo para facilitar su seguimiento, salvo en ciertos casos en los que el desarrollo completo de los cálculos distraería al lector del hilo principal de la demostración. Las simulaciones se han obtenido mediante programación en C++ y no se han incluido los programas por el caracter informal de estos
Correlation between Power Elbow Flexion and Physical Performance Test: A Potential Predictor for Assessing Physical Performance in Older Adults
No full textCorrelation; Functional tests; Muscle power; Older adultsCorrelación; Pruebas funcionales; Poder muscular; Personas mayoresCorrelació; Proves funcionals; Potència muscular; Gent granBackground: With the increasing number of older adults and their declining motor and cognitive function, it is crucial to find alternative methods for assessing physical functionality. The Short Physical Performance Battery (SPPB), the Time Up and Go (TUG) test, the 4 Meter Walk Test and the Barthel Index (BI) have been used to evaluate mobility and fragility and predict falls. But some of these functional test tasks could be difficult to perform for frail older adults or bedridden patients that cannot ambulate. This study aimed to evaluate the relationship between these functional tests and the power elbow flexion (PEF test).
Material and methods: A correlation study was designed with 41 older adults over 65 years of age. The upper limb muscle power was measured using a linear encoder (VITRUBE VBT) with the flexion of the elbow.
Results: Strong correlations were found between the PEF test and the 4mWT (rho = 0.715, p = 0.001) and TUG (rho= -0.768, p = 0.001), indicating that the greater the upper limb muscle power is, the greater physical performance will be. Moderate correlations were also found between the PEF and Barthel Index (rho = 0.495, p = 0.001) and SPPB (rho = 0.650, p < 0.001).
Conclusions: There is a strong correlation between PEF and the functional tests, proving that older adults that have greater upper limb muscle power have better physical performance. Upper limb muscle power and PEF could be an interesting tool for the assessment of physical performance in bedridden older adults
Effectiveness of a Multicomponent Training Program on Physical Performance and Muscle Quality in Older Adults: A Quasi-Experimental Study
No full textAging is associated with a decrease in functional capacity, manifested by a loss of strength, physical performance and muscle quality. Multicomponent training (MCT), characterized by the combination of at least three types of training, could be a good strategy to counteract these changes. To date there are no studies evaluating the effectiveness of MCT in improving both physical performance and muscle quality simultaneously. The aim of this study is to evaluate the changes produced by an MCT program on both physical performance and muscle quality in a population of healthy older adults. Sixteen healthy older adults were recruited to perform a 15-session multicomponent training intervention. Physical performance was assessed by different functional tests, and muscle quality was assessed by tensiomyography and myotonometry. The main results of this study show some improvement in functional tests, but not in muscle quality parameters, except for vastus lateralis stiffness. MCT is able to generate improvements in the physical performance of older adults, but these improvements are not reflected in muscle quality parameters measured by tensiomyography and myotonometry
Sex differences in pre-season anthropometric, balance, and range of motion characteristics in elite youth soccer players
No full textIn soccer, injury epidemiology differs between males and females. It is clinically useful to know whether there are between-sex differences in selected characteristics relevant to primary injury risk and injury prevention practices. The purpose of this study was to explore between-sex differences in anthropometric, balance, and range-of-motion characteristics in Spanish elite male and female youth soccer players. This was a pre-season cross-sectional study. Sixty-nine males (age 16.8 ± 0.9 yr; height 175.9 ± 6.8 cm; mass 67.9 ± 6.3 kg) and thirty-seven females (age 17.2 ± 1.7 yr; height 164.0 ± 6.3 cm; mass 59.0 ± 5.8 kg) participated. Anthropometrics (standing/sitting height, bodymass, right/left leg length) and right/left anterior reach test (ART), hip internal/external active range of motion, active knee extension (AKE), and weightbearing lunge test (WBLT) were measured. Between-sex differences were assessed with Bonferroni-corrected Mann–Whitney U tests and Cliff’s delta (d). Between-sex significant differences (p < 0.003, d ≥ 0.50) were observed for anthropometric data and for hip internal rotation. No between-sex significant differences were observed for ART/AKE/WBLT measures. Between-sex significant differences with large effect sizes were identified for anthropometric data and right/left hip internal rotation. The present study adds new data to the literature for young Spanish male and female soccer players. The present findings will help inform clinical reasoning processes and future injury prevention research for elite male and female youth soccer players
PHS20 Cost Associated to the Management of Inappropriate Shocks in Patients With an Implantable Cardioverter Defibrillator – Cardina Study
No full textFig 2 -
No full textA) Modified Back Saver Sit and reach test. B) Passive Knee Extension Test. C) Hamstring strength. D) Gluteus strength. E) Surface electromyography. F) Countermovement jump.</p
Fig 3 -
No full textA-B) Diacutaneous fibrolysis to quadratus lumborum C) Diacutaneous fibrolysis to gluteal area, D) Diacutaneous fibrolysis between vastus externus and biceps fermoris E-F) Di-acutaneos fibrolysis hamstring area.</p
