17,730 research outputs found
Lincoln Silva, iconoclasta
No full textLincoln Silva, iconoclastLincoln Silva is one of the Paraguayan writers outshone by Augusto Roa Bastos and Gabriel Casaccia. Being an author of two novels, Rebelión después and General, general, he displays his belonging to Rafael Barrett’s “journalism of accusation,” originated at the beginning of the 20th century. In general, Silva can be considered an anarchist who does not agree with Alfredo Stroessner’s dictatorial system and criticizes the institution of the Church and its language. The proletarian revolution and politics itself become another subject of his criticism. Silva opposes the dictator but does not consider satisfactory the possible governance of the opposition. He ridicules the topics of the Paraguayan culture without offering concrete solutions. He refuses the concepts but does not intend to be constructive. Just as Cassacia’s protagonists, all the characters created by Silva are pulled into ethically ambiguous situations and they can be possibly interpreted as “esperpentic.”Lincoln Silva, iconoclastLincoln Silva is one of the Paraguayan writers outshone by Augusto Roa Bastos and Gabriel Casaccia. Being an author of two novels, Rebelión después and General, general, he displays his belonging to Rafael Barrett’s “journalism of accusation,” originated at the beginning of the 20th century. In general, Silva can be considered an anarchist who does not agree with Alfredo Stroessner’s dictatorial system and criticizes the institution of the Church and its language. The proletarian revolution and politics itself become another subject of his criticism. Silva opposes the dictator but does not consider satisfactory the possible governance of the opposition. He ridicules the topics of the Paraguayan culture without offering concrete solutions. He refuses the concepts but does not intend to be constructive. Just as Cassacia’s protagonists, all the characters created by Silva are pulled into ethically ambiguous situations and they can be possibly interpreted as “esperpentic.&rdquo
Ashley Judd and Candelaria Silva discuss, Bittersweet Humanitarianism at Ford Hall Forum, video recording, 4/8/2011
No full textAshley Judd, award-winning actress, humanitarian, and author of All That Is Bitter and Sweet joins moderator Candelaria Silva, author and Roxbury Film Festival founder, to discuss Judd\u27s experiences in feminist social justice work to discover the relationship between healing oneself and healing others.https://dc.suffolk.edu/fhf-av/1107/thumbnail.jp
¿Una nueva cuestión social?
No full textThe present article, as the author suggests, is a reviewed version of the conference held at Universidad Católica Cardenal Silva Henríquez, on the occasion of the celebration of the Social Worker's day, in November 2005. This celebration- organized by the Department of Social Work and whose invitation is deeply appreciated by the author- was presided over by a new performance on stage of Cantata Santa María de Iquique, by the recently deceased Chilean composer Luis Advis V., and which is, according to Aquín, "an extraordinary expression of the social concern", not only for Chile, but for the area of Latin America as well.El presente artículo, nos indica su autora, es una versión revisada de la conferencia desarrollada en la Universidad Católica Carden Raúl Silva Henríquez, con motivo de la celebración del dia del Trabajador Social, en noviembre de 2005. Dicha celebración -organizada por el Departamento de Trabajo Social y cuya invitación, la autora "agradece profundamente" - estuvo presidida por una nueva puesta en escena de la Cantata Santa María de Iquique, del compositor chileno recientemente fallecido, Luis Advis V., que resulta, según Aquín, "una extraordinaria expresión de la cuestión social", no sólo para Chile sino para el conjunto de América Latina
La situación de los derechos humanos en Chile, hoy. Desafíos para la construcción de una sociedad democrática
No full textThe essay-like reflection included here was presented at the inter-school seminar of Social Work, Sociology and Law courses of Catholic University Silva Henríquez (UCSH), held on March 28th, 2018 in Santiago, and which was entitled "After 70 Years of the Universal Declaration of Human Rights: Challenges of citizenship and the State in today's Latin America." In the text, some areas, themes and human groups are chosen for they, according to the author, make visible the main gaps and advances in human rights, constituting an opportunity to reflect and renew the commitment with human rights from different disciplines and from the role of citizens, in order to strengthen democracy, justice and freedom.La reflexión de corte ensayístico que aquí se presenta, se expuso en el seminario interescuelas de las carreras de Trabajo Social, Sociología y Derecho de la Universidad Católica Silva Henríquez (UCSH). Este encuentro, titulado "A 70 Años de la Declaración Universal de los Derechos Humanos: Retos de la ciudadanía y el Estado en la América Latina actual", se realizó en la sede central de la Universidad Silva Henríquez el 28 de marzo de 2018 en Santiago, Chile. En el texto se escogen algunos ámbitos, temas y grupos humanos que, a juicio de la autora, visibilizan las principales brechas y avances en materia de derechos humanos, lo que constituye una oportunidad de reflexionar y renovar el compromiso con los derechos humanos desde las distintas disciplinas y desde el papel de ciudadanos/as, en aras a fortalecer la democracia, la justicia y la libertad
Estudo e implementação de um conversor bidirecional como interface na regulação de tensão em barramento c.c. e carregamento de baterias em um sistema nanorrede
No full textDue to the increase of electricity demand to attend the growing needs of society and to compensate deficiencies of the energy generation, there is a need to enhance the participation of renewable energy resources into the energy matrix, since conventional fossil energy sources will not be able to supply this increasing energy demand owing to environmental con-strains. The smart grids introduce new concepts for the electrical power system, such as mi-cro and nanogris, in which the power generation is based on renewable resources like wind and solar power. The energy production in such systems depends on natural factors as solar irradiation and wind speed, what requires the employment of local energy storage systems, based normally on batteries, in order to ensure uninterrupted power supply to the local power system, or nanogrid. In this thesis, a study is conducted over a bidirectional dc-dc converter, which inter-faces the energy storage system and the main dc bus of a dc nanogrid. This power converter will control the power flow between the nanogrid and the battery banks, hence providing a regulated dc voltage on the nanogrid side. The dc nanogrid architecture is presented and the bidirectional dc-dc converter topologies revised, thus enabling the selection of the Dual Ac-tive Bridge structure as the interface converter. A set of modulation techniques were studied in order to decide which one is more suitable for employment on an experimental converter. A control method is proposed which provides means for ensuring a regulated voltage on the nanogrid main dc bus and concomitantly respects the battery bank charging restrictions.Devido ao aumento da demanda de energia elétrica para atender as necessidades cres-centes da sociedade e suprir as deficiências na geração, existe a demanda de se aumentar a participação das fontes renováveis de energia na matriz de eletricidade dada as restrições am-bientais. Dessa forma, as redes inteligentes de energia introduzem novos conceitos para o sis-tema elétrico, tal como as microrredes e nanorredes, as quais possuem sua geração baseada em fontes renováveis como eólica e solar. A produção de energia por essas fontes depende de fatores naturais, como o sol e o vento, o que leva à necessidade de sistemas de armazenamen-to de energia em bancos de baterias para garantir o fornecimento ininterrupto à nanorrede. Nesse trabalho, um estudo acerca de um conversor bidirecional c.c.-c.c. para interface entre sistemas de armazenamento de energia e barramento c.c. da nanorrede é realizado com a finalidade de que se possa manter a tensão no barramento c.c. regulada através do controle do fluxo de potência entre o sistema de armazenamento e barramento. A estrutura da nanorrede é apresentada, o estudo das topologias de conversores bidirecionais c.c.-c.c. é realizado possibi-litando a utilização do conversor Dual-Active-Bridge como mecanismo de interface entre o barramento c.c. e o sistema de baterias. Os métodos de modulação para controle de potência são estudados para a seleção do método de modulação mais adequado para a implementação experimental do conversor. Uma técnica de controle é proposta para que se possa atender ao fluxo bidirecional de potência e o processo de carregamento de baterias
Estudo e implementação de um conversor bidirecional como interface na regulação de tensão em barramento c.c. e carregamento de baterias em um sistema nanorrede
No full textDue to the increase of electricity demand to attend the growing needs of society and to compensate deficiencies of the energy generation, there is a need to enhance the participation of renewable energy resources into the energy matrix, since conventional fossil energy sources will not be able to supply this increasing energy demand owing to environmental con-strains. The smart grids introduce new concepts for the electrical power system, such as mi-cro and nanogris, in which the power generation is based on renewable resources like wind and solar power. The energy production in such systems depends on natural factors as solar irradiation and wind speed, what requires the employment of local energy storage systems, based normally on batteries, in order to ensure uninterrupted power supply to the local power system, or nanogrid. In this thesis, a study is conducted over a bidirectional dc-dc converter, which inter-faces the energy storage system and the main dc bus of a dc nanogrid. This power converter will control the power flow between the nanogrid and the battery banks, hence providing a regulated dc voltage on the nanogrid side. The dc nanogrid architecture is presented and the bidirectional dc-dc converter topologies revised, thus enabling the selection of the Dual Ac-tive Bridge structure as the interface converter. A set of modulation techniques were studied in order to decide which one is more suitable for employment on an experimental converter. A control method is proposed which provides means for ensuring a regulated voltage on the nanogrid main dc bus and concomitantly respects the battery bank charging restrictions.Devido ao aumento da demanda de energia elétrica para atender as necessidades cres-centes da sociedade e suprir as deficiências na geração, existe a demanda de se aumentar a participação das fontes renováveis de energia na matriz de eletricidade dada as restrições am-bientais. Dessa forma, as redes inteligentes de energia introduzem novos conceitos para o sis-tema elétrico, tal como as microrredes e nanorredes, as quais possuem sua geração baseada em fontes renováveis como eólica e solar. A produção de energia por essas fontes depende de fatores naturais, como o sol e o vento, o que leva à necessidade de sistemas de armazenamen-to de energia em bancos de baterias para garantir o fornecimento ininterrupto à nanorrede. Nesse trabalho, um estudo acerca de um conversor bidirecional c.c.-c.c. para interface entre sistemas de armazenamento de energia e barramento c.c. da nanorrede é realizado com a finalidade de que se possa manter a tensão no barramento c.c. regulada através do controle do fluxo de potência entre o sistema de armazenamento e barramento. A estrutura da nanorrede é apresentada, o estudo das topologias de conversores bidirecionais c.c.-c.c. é realizado possibi-litando a utilização do conversor Dual-Active-Bridge como mecanismo de interface entre o barramento c.c. e o sistema de baterias. Os métodos de modulação para controle de potência são estudados para a seleção do método de modulação mais adequado para a implementação experimental do conversor. Uma técnica de controle é proposta para que se possa atender ao fluxo bidirecional de potência e o processo de carregamento de baterias
Oriental: a importância do timbre na obra de Pattápio Silva
No full textThe flutist and composer Pattápio Silva (1880-1907) was one of the Brazilian interpreters that reached larger prominence and projection in the society of his time. In spite of the short career, interrupted by the premature death, when he was 26 years old, Pattápio was considered a great virtuoso of his instrument besides having participated in the historical recordings accomplished in 1902, pioneers in brazil. Influenced by the European flutists' composers, we can highlight in the work of Pattápio Silva his innovative spirit with relation to the exploration of the technique of his instrument, with emphasis in the sound possibilities of the flute. Under these aspects, his work of larger prominence was Oriental op.6 to flute and piano. Through the spectrographic analyses accomplished in the work, we can observe the importance of the variations of tone-color proposed by the author in this piece.O flautista e compositor Pattápio silva (1880-1907) foi um dos intérpretes brasileiros que alcançou maior destaque e projeção na sociedade de sua época. Apesar da curta carreira, interrompida pela morte prematura aos 26 anos, Pattápio firmou-se como grande virtuose de seu instrumento além de ter participado das históricas gravações realizadas em 1902, pioneiras no Brasil. Influenciado pelos compositores flautistas europeus, podemos destacar na obra de Pattápio Silva seu espírito inovador quanto à exploração da técnica de seu instrumento, com ênfase nas possibilidades sonoras da flauta. Sob estes aspectos, sua obra de maior destaque foi Oriental op. 6 para flauta e piano. Através das análises espectográficas realizadas neste trabalho, poderemos observar a importância das variações de timbre propostas pelo autor nesta peça
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
Ruellia scarlatina M. J. Silva. A. Flowering 2022, nom. nov.
No full textRuellia scarlatina M.J. Silva, nom. nov. (Figure 1). = Ruellia capitata Rizzini (1956: 156.) nom. illeg., non Ruellia capitata Buchanan-Hamilton ex D. Don. (1825: 120). Type:— BRAZIL. Goiás: Niquelândia, 26 July 1952, fl., localidade do Macedo, A. Macedo 3677 (holotype RB 78758!; isotypes NY930506! S09-8233!, SP 84553!, US 2059785!, US 2197176!). Description:—Shrub or subshrub, erect, 0.7–1.8 m tall; stems subcylindrical at base and subquadrangular distally, green with brown spots, glabrous, few or non-branched on upper third; internodes 1.5–4.6 cm long, slightly dilated above the nodes. Leaves opposite decussate, membranaceous; petiole 6–7 mm long; leaf blade11–12 × 1.9–4.2 cm, narrowly elliptic, elliptic or oblong-elliptic, base attenuated, apex acuminate, margins entire, sparsely scabridulous with glandular-sessile trichomes on both surfaces, the scabridulous trichomes denser on the veins, adaxial surface dark green, abaxial surface opaque green, venation camptodromous-brochidodromous, secondary veins 8–10 per side, curved at apex, impressed on adaxial surface, prominent on abaxial surface, tertiary veins perpendicular to the secondary ones, impressed on both surfaces; cystoliths conspicuous on both surfaces. Thyrses glomeruliform, four-sided, 3–5 cm long, terminal, congested, sessile; bracts 3.9–5.5 × 0.4–0.6 cm, lanceolate, lance-elliptic, margins ciliate, apex acute, similar tonormal leaves in terms of indumentum, sessile; bracteoles 2.4–2.7 × 1.1–1.3 cm, widely ovate, pubescent and glandular-capitate on both surfaces, margins entire, apex acute, conspicuously nerved, sessile. Flowers 5.2–5.3 cm long; calyx 2.2–2.3 cm long, with glandular and pubescent trichomes on both surfaces, 5-lobed, lobes 2.2–2.5 × 0.49–0.51 cm, subequal, lanceolate, foliaceous, margins entire, apex obtuse; corolla 4.9–5 cm long, infundibuliform, scarlet-red, glandular-capitate externally, tube 2.6–2.7 cm long, the throat 2–2.3 cm long, subcylindrical, lobes 1.4–1.5 × 1–1.1 cm, slightly curved and spreading, ovate or ovate-elliptic, apex obtuse, rounded or emarginate; stamens 4, weakly didynamous, exserted, filaments inserted ca. 2.6 cm above the base of the corolla, sparsely hirsute-glandular, the shorter pair ca. 3.4 mm long, the longer pair ca. 3.5 mm long, anthers 5.8–6 mm long, dorsifixed, sagittate, mucronulate; ovary 4.2–4.3 × 1.3–1.7 mm, oblongoid or oblong-obovoid, densely and shortly hispid, styles 5.3–6.3 cm long, hispid, stigma bilobed, asymmetrical, nectar disc annular. Capsules 1.5–1.6 × ca. 0.5 cm, clavate, shortly acuminate, green when immature and cream-colored when mature, dense and short-tomentose; retinacula 2.9–3 mm long; calyx persistent and larger than the fruits. Seeds 7-8, 4.7–4.8 × ca. 4.8 mm, orbicular, light brown, apex obtuse, margins slightly whitish, with hygroscopic trichomes covering the entire surface. Phenology:—Collected with flowers in June, and with flowers and fruits in August and September. Distribution and ecology: —Endemic to Goiás State, Brazil, and collected so far in mountainous areas in the municipality of Niquelândia (Figure 2). It grows in “cerrados densos”, “brejos”, edges of “florestas estacionais” or “florestas de galeria” on clayey and stony soils between 758 and 818 m. a.s.l. Etymology:—The specific epithet “scarlatina” alludes to its scarlet-red corolla. Additional specimens examined:— BRAZIL. Goiás: Niquelândia, ca. 2 km da estrada para Macêdo Velho, 14°21’03”S, 48°24’52’’W, 29 August 1995, fl., M. L. Fonseca, R. Marquete & F. C. A. Oliveira 431 (IBGE, US); ibd., junto a cidade, Morro do Cristo, 14°27’08”S, 48°27’26’’W, 19 September 1996, fl. fr., 29 August 1995, fl., M. Aparecida da Silva & C.C. S. Ferreira 3145 (US, IBGE); ibd., rodovia Niquelândia-Votoratim Metais (BR 535), cerca de 3, 4 km do trevo de Niquelândia, margens da rodovia, 14°26’08”S, 48°26’34.6”W, 818 m. a.s.l., 07 September 2013, fl., Pirani, J.R. et al. 6494 (K, RB, SPF, UB); ibd., 2.3 km N of Niquelândia on GO-535, in route to Macêdo Velho, measured from traffic circle leaving town, 14°42’02”S, 48°29’02”W, 20 August 2016, fl., fr., Erin Tripp & Nicolás Medina 5968 (NY, COLO); ibd., cerca de 3, 5 km antes de chegar a Vila Macedo, cerrado denso, 14°23’53”S, 48°25’58”W, 29 August 2019, fl., fr., M. J. Silva & A. A. Alonso 9887 (UFG); ibd., GO 535 em direção a Vila Macedo, cerca de 200 metros acima da bica, 14°27’03”S, 48°26’46”W, 758 m. a.s.l., 24 June 2021, fl., M. J. Silva & I. S. Santos 12860 (UFG), M. J. Silva & I. S. Santos 12861 (UFG), M. J. Silva & I. S. Santos 128602 (UFG), M. J. Silva & I. S. Santos 12863 (UFG). Preliminary conservation status:—Species classified as Critically Endangered (CR), Criterion B1 subcriteria v, vi., E vii, due to having an estimated Extent of Occurrence of 47,561 Km 2. It forms populations of less than 20 adults plants and grows in areas under strong anthropogenic pressure such as roadsides, but also in mountainous areas, inappropriate for agricultural practices or civil construction. Morphological relationships and systematic position:— Ruellia scarlatina can be recognized by its subshrubby or shrubby habit, glabrous stems, glomeruliform and congested thyrses, with ovate or ovate-elliptic bracteoles, densely covered by glandular trichomes on both sides, flowers with calyx deeply divided into 5 lobes, corolla infundibuliform, scarlet-red, with external glandular trichomes and broad lobes, ovate or ovate-elliptic, stamens weakly didynamous, gynoecium shortly hispid, with clavate capsules with 7 or 8 orbicular seeds completely covered by hygroscopic hairs. According to Ezcurra (1993), due to its red corolla, Ruellia scarlatina could be included in the informal group Physiruellia, which, according to that author, is represented in South America by six species [R. elegans Poiret (1816: 727), R. reitzii Wasshausen & Smith (1969: 60), R. brevifolia (Pohl 1831: 155) Ezcurra (1989: 278), R. angustiflora Ness (1847: 51) Lindau ex Rambo (1964: 23), R. sanguinea Grisebach (1879: 260) and R. longipedunculata Lindau (1895:365)]. Tripp (2007), in a phylogenetic study of Ruellia, recovered the species placed by Ezcurra (1993) into the informal group Physiruelliain the “Physiruellia clade”, which, according to that author, included plants generally with dichasia simple or compound, profusely branched, and often long-pedunculate, flowers subtended by paired bracteoles, corolla often inflated,ovary with 8-14 ovules,capsules clavate,and seeds with hydroscopic trichomes only on their margins. The species of this clade, according to that author, were previously placed in the sections Ruellia and Physiruellia by Lindau (1895). Fernandes et al. (2020) cited six species of Ruellia with red flowers in Goiás State [R. adenocalyx Lindau (1898: 46), R. amplexicaulis (Nees 1847: 59) Lindau (1895: 311), R. angustior (Nees1847: 34) Lindau (1898: 46), R. brevifolia (Pohl 1831: 84) Ezcurra (1989: 278), R. densa (Nees 1847: 47) Hieronymus (1878: 74), and R. elegans Poiret (1816: 727)]. Although R. scarlatina shares red flowers with them, it cannot easily be confused with any of them because of leaf peculiarities (shape, apex, aspects of the trichomes, venation pattern), the type of inflorescence, and capsules, and the number of seeds per capsule, as evidenced in the key below.Published as part of Silva, Marcos José Da, 2022, Ruellia scarlatina, a new name for the sixty-year-old but misunderstood Ruellia capitata Rizzini (Acanthaceae), pp. 55-65 in Phytotaxa 547 (1) on pages 57-60, DOI: 10.11646/phytotaxa.547.1.5, http://zenodo.org/record/655593
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