5,655 research outputs found
SC author and illustrator Kate Salley Palmer signing book
No full textPhotograph of SC author and illustrator Kate Salley Palmer signing boo
Book signing by SC author and illustrator Kate Salley Palmer
No full textPhotograph of Book signing by SC author and illustrator Kate Salley Palme
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
Seleção recorrente de famílias de meio-irmãos em população composta de milho (Zea mays L.) procedente de Anchieta - SC
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias. Programa de Pós-Graduação em Recursos Genéticos e Vegetais.A substituicao de variedades locais de milho pelas variedades melhoradas inviabilizou o processo produtivo e economico de muitas propriedades agricolas que nao puderam acompanhar a modernizacao da agricultura. Diante disso, alguns agricultores retornaram ao cultivo de variedades locais ou crioulas de milho, em busca de material mais adaptado a estes ambientes particulares de cultivo. O presente trabalho e parte de um processo ciclico de desenvolvimento de uma nova variedade de polinizacao aberta, iniciado a partir de uma populacao composta de Anchieta, denominada MPA1, desenvolvido por um agricultor do municipio. O primeiro ciclo de selecao conduzido neste trabalho foi baseado no metodo de selecao recorrente convergente-divergente intrapopulacional proposto por Lonquist, porem usando familias de meio-irmaos como unidade de selecao e recombinacao. Os caracteres usados como criterios de selecao foram estabelecidos pelos agricultores da regiao Oeste Catarinense. A definicao de uma estrategia adequada para a selecao simultanea de caracteres, que atendesse aos interesses particulares desses agricultores, foi a base para o inicio desse trabalho. Foram conduzidos tres experimentos em blocos ao acaso, em tres propriedades de agricultores. Em cada propriedade foram avaliados 64 tratamentos em tres repeticoes, para 18 caracteres fenotipicos definidos por agricultores da regiao. Foram conduzidas analises de variancia individuais para cada carater, em cada um dos tres locais, dentre os quais, 11 apresentaram significancia (¥á ¡Â 0,05) entre os tratamentos. Para estas variaveis, o ganho direto de selecao, a partir da selecao truncada de 25% das familias de meio-irmaos, foi estimado em 3,65%, 5,95% e 5,48% para a produtividade de graos (PROD); 2,82%, 4,76% e 5,72% para diametro de colmo (DCO); 4,93%, 3,77% e 5,60% para numero de fileiras de graos espiga-1 (NFG); 9,72%, 7,02% e 7,21% para posicao da espiga na colheita (PEC); -4,99%, -5,75% e -5,15% para altura de planta (APL); 26,16%, 14,05% e 20,26% para quantidade de raizes adventicias (QRA); 5,41%, 6,01% e 3,21% para numero de graos fileira-1 (NGF); 5,93%, 7,58% e 5,16% para comprimento de espiga (CES); -6,37%, -5,16% e -3,87% para angulo entre a folha e o caule (ALC); -11,83%, -15,58% e -13,36% para numero de ramificacoes secundarias do pendao (RSP) e -3,94%, -3,48% e -1,13% para dias da emergencia ate a liberacao de polen (CIC), para os locais 1, 2 e 3 respectivamente. Para estas mesmas variaveis, a partir da analise de covariancia, foram estimados os coeficientes de correlacao genetica, fenotipica, de ambiente e os ganhos indiretos de selecao entre pares de variaveis. Foram observados coeficientes de correlacao genetica ( g r ) significativos (¥á ¡Â 0,05) entre PROD com as variaveis QRA (-0,77), DCO (-0,76), NGF (0,60) e CIC (-0,65) no local 1; PROD com ALC (0,42), QRA (-0,67), APL (0,28), NFG (0,34), NGF (0,57), CES (0,09) e PEC (-0,28), no local 2, e; PROD com ALC (0,35), DCO (0,61) NGF (0,70) e CES (0,53), no local 3. As estimativas dos ganhos indiretos de selecao das variaveis cujos coeficientes g r foram significativos (¥á ¡Â 0,05) com PROD, estimados a partir da selecao truncada, corresponderam a -13,69% (QRA), -1,66% (DCO), 2,31% (NGF) e -1,53% (CIC), no local 1; em 1,66% (ALC), -8,26% (QRA), 1,14% (APL), 0,94% (NFG), 2,64% (NGF), 0,48% (CES) e -2,94% (PEC), no local 2 e; em 1,07% (ALC), 2,38% DCO), 1,97% (NGF) e 1,98% (CES), no local 3. Em razao das combinacoes entre PROD com QRA e DCO, no local 1, PROD com ALC, QRA, APL e PEC, no local 2, e PROD com ALC, no local 3 terem apresentado coeficientes g r de sentido inverso ao interesse dos agricultores, sugere-se a adocao de indices de seleca com a devida ponderacao das variaveis para promover o melhoramento simultaneo dos principais atributos destacados como prioritarios pelos agricultores
SC-Square: Overview to 2021.
No full textThis extended abstract was written to accompany an invited talk at the 2021 SC-Square Workshop, where the author was asked to give an overview of SC-Square progress to date. The author first reminds the reader of the definition of SC-Square, then briefly outlines some of the history, before picking out some (personal) scientific highlights
SC-Square: Overview to 2021.
No full textThis extended abstract was written to accompany an invited talk at the 2021 SC-Square Workshop, where the author was asked to give an overview of SC-Square progress to date. The author first reminds the reader of the definition of SC-Square, then briefly outlines some of the history, before picking out some (personal) scientific highlights
Supply Chain (SC) Network Optimization
No full textSupply chain network design and optimization is one of the most important strategic decisions that an organization has to make. SC network design decisions are strategic-level SC decisions because they have long-lasting effect on the firms' supply chain performance and the decisions cannot be changed in a short period. In this chapter, the author aims to introduce the concept of SC network optimization to the managers of medium-sized enterprises. The chapter also explains the importance of the SC network optimization studies, educates readers about how they can benefit from the concept, and tries to show how the implementation of SC network optimization/design will improve the competitiveness of these organizations. The readers are also guided through the four steps of SC network optimization process. Finally, the chapter provides a brief review of the SC network optimization literature and proposes future research directions. </jats:p
The turbulence structure of 3D separation (Stall Cells) over an airfoil
No full textThe flow over airfoils that experience separation of the trailing edge type becomes three-dimensional at angles of attack around maximum lift and Stall Cells (SCs) form. SCs are large scale coherent structures of separated flow that consist of two counter-rotating vortices. In the present study the turbulence structure of a SC over a rectangular wing is investigated using Stereo PIV measurements. It is found that the turbulence characteristics of the flow are highly anisotropic and that the Boussinesq approximation is invalid. High values of normal Reynolds stresses in the SC vortices and the separation shear layer region indicates a wandering motion of the former and a flapping motion of the latter. Based on the available data the relation between Reynolds stresses, their production terms and the mean flow gradients is examined. It is found that at the centre of the SC, between the two vortices, the flow characteristics resemble those of a double shear layer while at the vortex region the effect of the vortices leads to double peaks in production terms
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