4,150 research outputs found
Sistemática de heterocondylus R.M. King & H. Rob. (Eupatorieae, Asteraceae)
No full textHeterocondylus R.M. King & H. Rob. belongs to the subtribe Ayapaninae R.M. King & H. Rob., from Eupatorieae Cass. (Asteraceae), and was described from a group of species from Eupatorium L. with slightly distorted carpopodium, with cell walls distinctly thickened, and an enlarged and variably hairy style base. Its heterogeneous morphology as well as the similarity of some of its species with Campuloclinium DC. (from the subtribe Gyptidinae R.M. King & H. Rob.) raise doubts about their monophyly and phylogenetic relationships with the rest of Ayapaninae. Furthermore, the presence of various taxonomic and nomenclatural problems and the presence of species complexes show the need of a taxonomic study to Heterocondylus. Thus, in order to address these issues, we performed cladistic analyses with evidence of DNA (ITS and trnLF) and morphological characters, and with the combination of these datasets. Also a morphometric study with two species complexes and the taxonomic treatment were accomplished to the genus. We found that all the phylogenetic inferences revealed a non monophyletic Heterocondylus. The morphological characters used to circumscribe the genus were not sufficient to group its species. Heterocondylus will be a natural group with the inclusion of Alomiella R.M. King & H. Rob., Ayapanopsis R.M. King & H. Rob. and Monogereion G.M. Barroso & R.M. King or with the description of a new genus to include part of Heterocondylus species. We reduced the 14 species previously accepted for Heterocondylus to seven in the present study. Eupatorium semiamplexifolium G.S.S. Almeida & Carv.-Okano and H. itacolumiensis (Sch. Bip. ex Baker) R.M. King & H. Rob. were synonymized under H. alatus (Vell.) R.M. King & H. Rob., based on the morphometric study of the three species. Also based on morphometric studies, H. inesiae R. Esteves, H. jaraguensis (B.L. Rob.) R.M. King & H. Rob. and H. reitzii R.M. King & H. Rob. were synonymized under H. pumilus (Gardner) R.M. King & H. Rob. The synonymy of H. pandurifolius (Baker) R.M. King & H. Rob. under H. amphidictyus (DC.) R.M. King & H. Rob., and H. grandis (Sch. Bip. ex Baker) R.M. King & H. Rob. and Heterocondylus leptolepis (Baker) R.M. King & H. Rob. under H. decipiens (Baker) R.M. King & H. Rob. were done based on examination of specimens of the species. In addition, descriptions of H. lysimachioides (Chod.) R.M. King & H. Rob., H. macrocephalus H. Rob. and H. vitalbae (DC.) R.M. King & H. Rob. are presented. Identification key, illustrations, photographs and distribution maps for the species of Heterocondylus are presented.Heterocondylus R.M. King & H. Rob. pertence à subtribo Ayapaninae R.M. King & H. Rob., de Eupatorieae Cass. (Asteraceae), e foi descrito para abrigar um conjunto de espécies segregadas de Eupatorium L. com carpopódio levemente distorcido, de paredes celulares bastante espessas e a base do estilete alargada e variavelmente pilosa. Entretanto, sua morfologia heterogênea assim como a semelhança de algumas de suas espécies com Campuloclinium DC. (pertencente à subtribo Gyptidinae R.M. King & H. Rob.) suscitam dúvidas a respeito de seu monofiletismo e proximidade filogenética com as demais Ayapaninae. Além disso, a presença de vários problemas nomenclaturais e taxonômicos e de complexos de espécies demonstram a necessidade de um tratamento taxonômico para Heterocondylus. Visando a resolução destas questões, foram realizadas análises cladísticas com dados morfológicos e moleculares (ITS e trnLF), e também um estudo morfométrico com dois complexos de espécies e o tratamento taxonômico do gênero. Em todas as inferências filogenéticas realizadas, Heterocondylus emerge como um grupo não monofilético. As características morfológicas utilizadas para a circunscrição do gênero não foram suficientes para agrupar suas espécies. Para que Heterocondylus venha a ser um grupo natural, é necessário incluir os gêneros Alomiella R.M. King & H. Rob., Ayapanopsis R.M. King & H. Rob. e Monogereion G.M. Barroso & R.M. King neste ou descrever um novo gênero para incluir parte de suas espécies. As 14 espécies inicialmente aceitas para Heterocondylus foram reduzidas para sete no presente estudo. Eupatorium semiamplexifolium G.S.S. Almeida & Carv.-Okano e H. itacolumiensis (Sch. Bip. ex Baker) R.M. King & H. Rob. foram sinonimizadas sob H. alatus (Vell.) R.M. King & H. Rob., com base no estudo morfométrico de exemplares das três espécies. Ainda com base nos estudos morfométricos, H. inesiae R. Esteves, H. jaraguensis (B.L. Rob.) R.M. King & H. Rob. e H. reitzii R.M. King & H. Rob. foram sinonimizadas sob H. pumilus (Gardner) R.M. King & H. Rob. Ainda foi feita a sinonímia de H. pandurifolius (Baker) R.M. King & H. Rob. sob H. amphidictyus (DC.) R.M. King & H. Rob., e de H. grandis (Sch. Bip. ex Baker) R.M. King & H. Rob. e Heterocondylus leptolepis (Baker) R.M. King & H. Rob. sob H. decipiens (Baker) R.M. King & H. Rob., com base no exame dos exemplares das espécies. Além destas espécies, são apresentadas as descrições de H. lysimachioides (Chod.) R.M. King & H. Rob., H. macrocephalus H. Rob. e H. vitalbae (DC.) R.M. King & H. Rob. O trabalho também contém chave de identificação, ilustrações, fotos e mapas de distribuição para as espécies de Heterocondylus
R.M. Simmons presentation, Rena Smart book review
No full textR.M. Simmons of the Gospel Music Workshop of America gives a presentation on the African influence in the African American religious experience. He explains how African slaves brought to America their concept of music (utilitarian concept of music). Simmons further discusses the fusion between the utilitarian concept and the Western concept of religion resulting in spirituals. He also describes hymn categories in early forms of formal African American worship experiences. Simmons takes questions from the audience among which is Dr. Riggins Earl Jr. Video concludes with a book review on Christian Theology and Ethics by Rena Smart.The Atlanta University Center Robert W. Woodruff Library acknowledges the generous support of the National Endowment for Humanities - Humanities Collections and Reference Resources Implementation Project Grant in supporting the processing and digitization of a number of its major archival collections as part of the project: Spreading the Word: Expanding Access to African American Religious Archival Collections at the Atlanta University Center Robert W. Woodruff Library.</em
Maps of soil organic carbon stocks in Brazil
No full textThis database was created by Gustavo Vieira Veloso and Lucas Carvalho Gomes 04/06/2022.
Contact: [email protected] and [email protected]
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Maps of soil organic carbon (SOC) stocks in Brazil of the article: "Modeling and mapping soil organic carbon stocks in Brazil" (doi: 10.1016/j.geoderma.2019.01.007)
The dataset is composed of five folders of SOC stocks maps at the standard depths (0–5, 5–15, 15–30, 30–60, and 60–100 cm). The maps are in Geotif format (EPSG 102015) with a spatial resolution of approximately 1 km and include the mean SOC stocks, standard deviation (SD), coefficient of variation (CV), 0.05 and 0.95 quantiles.
The maps are free to use and please cite also the article:
Gomes, L.C., Faria, R.M., de Souza, E., Veloso, G.V., Schaefer, C.E.G., & Fernandes Filho, E.I. (2019). Modeling and mapping soil organic carbon stocks in Brazil. Geoderma, 340, 337-350
Velocity-Gradient Probability Distribution Functions in a Lagrangian Model of Turbulence
No full textThe Recent Fluid Deformation Closure (RFDC) model of lagrangian turbulence is recast in path-integral language within the framework of the Martin-Siggia-Rose functional formalism. In order to derive analytical expressions for the velocity-gradient probability distribution functions (vgPDFs), we carry out noise renormalization in the low-frequency regime and find approximate extrema for the Martin-Siggia-Rose effective action. We verify, with the help of Monte Carlo simulations, that the vgPDFs so obtained yield a close description of the single-point statistical features implied by the original RFDC stochastic differential equations
Utricularia trichophylla Spruce ex Oliver 1860
No full text2.32. Utricularia trichophylla Spruce ex Oliv., Journal of the Proceedings of the Linnean Society, Botany 4: 173 (1860). [Figs. 2 and 7 U-V]. Terrestrial or helophyte. Aerial/submerged pinnatifid leaves. Slender and flexible scape. Peltate bracts, entire margins, absent bracteoles. Ascending pedicels in fruits. Sepals with inconspicuous nerves, plan and entire margins. Yellow corolla, gibbous palate, trilobed lower lip, straight and subulate/bifid/quadrifid spur, as long as and parallel to the lower lip. Capsule dehiscing by a ventral pore. Selected material:— Camaçari, 14 August 2003, fl. and fr., F. Rivadavia 1688 (SPF); Entre Rios, Areial, 31 October 2012, fl. and fr., A.V. Popovkin 1257 (HUEFS); Lençóis, Estrada entre Lençóis e Seabra, 15 February 1994, fl. and fr., R.M. Harley 14094 (SPF); Luís Eduardo Magalhães, Estrada BR-020 a 23 km S da cidade, 28 January 2002, fl. and fr., C.P. Bove 1002 (R); Maraú, 5 Km ao SE de Maraú, rod. p/ Ponta do Mutá, 02 February 1994, fl. and fr., R.M. Harley 18955 (CEPEC, K, NY); Porto Seguro, Trancoso, 24 November 2013, fl. and fr., P.C. Baleeiro 363 (SPF); Rio de Contas, 9 km N estrada para o povoado de Mato Grosso, 26 October 1988, fl. and fr., R.M. Harley 25667 (CEPEC, SPF); Sento Sé, APA Boqueirão da Onça, 05 September 2013, fl. and fr., D.S. Fernandes 88 (R); Umburanas, Delfino, Serra do Curral Feio, 12 April 1999, fl. and fr., L.P. de Queiroz 5458 (HUEFS). Comments:— Utricularia trichophylla can be confused with U. subulata (see comments section in this species). In Bahia state, this species is found in veredas, campos rupestres and restingas.Published as part of Guedes, Felipe Martins, Miranda, Vitor Fernandes Oliveira & Alves, Marccus, 2022, Diversity and distribution of Lentibulariaceae in Bahia state, Brazil: implications for phytogeography and conservation, pp. 213-255 in Phytotaxa 556 (3) on pages 242-243, DOI: 10.11646/phytotaxa.556.3.1, http://zenodo.org/record/697283
Present-day kinematics at the Azores-Gibraltar plate boundary as derivated from GPS observations
No full textAerospace Engineerin
Author Correction: Global geochemical fingerprinting of plume intensity suggests coupling with the supercontinent cycle
No full textThe original version of this Article omitted from the author list the 4th and 5th authors, Grant Cox and Ross Mitchell, who were both at Curtin University. Consequently, the corrected version of the Acknowledgements removes the following from the original version: ‘and Ross Mitchell’. In addition, the following was added to the Author Contributions: ‘G.M.C. and R.M. were involved in an early attempt of this study.’. This has been corrected in both the PDF and HTML versions of the Article
Colonising "The Coral Island": A Postcolonial Reading of R.M. Ballantyne's Children's "Classic"
No full textstudent essayBeing written during the rise of the British Empire in the 1850sm R.M. Ballantyne's boys' adventure story "The Coral Island" is in many ways a product of its time, conveying imperial ideas and Victorian values to the young reader. Through his portrayal of the native inhabitants in relation to his descriptions of the three British protagonists, the author creates a stereotyped image of the natives as primitive savages. Due to the further use of a first person narrator and realist pretensions, the dated racist ideas become influential upon the reader. In spite of the fact that the novel has been considered as an entertaining children's classic by generations since its first publication, "The Coral Island" should not be classified as good children's literature today but should rather be historicised as a result of its controversial contents. By adopting a postcolonial approach and applying postcolonial theory in my analysis of R.M. Ballantyne's "The Coral Island", I have in this essay endeavoured to demonstrate in what ways the novel would prove problematic as a children's book today. In my first chapter I present the imperial ideas and Victorian values that are conveyed, whereas in my second chapter I discuss Ballantyne's stereotyping of the natives. As a result of my study of this novel, I have exemplified how the author portrays the three British boys as representative of the Victorian ideals of the time. I have also illustrated their assumed superiority over nature and their roles as colonisers. Furthermore, my analysis of "The Coral Island" has revealed how Ballantyne communicates both white superiority as well as the Western "oblibation" to civilise primitive people throug Christian conversion. Consequently, the novel promotes the ideology of its time. As a result of my findings, I would like to argue that "The Coral Island" should today be viewed as a text conveying historical ideas and values rather than as an exciting children's classic
Utricularia praelonga A. St.-Hil. & Girard
No full text2.25. Utricularia praelonga A.St.-Hil. & Girard, Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences 7: 870 (1838). [Figs. 2 and 7L]. Terrestrial or helophyte. Aerial linear leaves. Slender and slightly stiff scape. Basifixed and basally connate bracts and bracteoles, plan and laciniate-denticulate margins. Ascending pedicels in fruits. Glandular sepals with conspicuous and prominent nerves, erose-denticulate margins. Yellow corolla, gibbous palate, entire to shallowly trilobed lower lip, curved and acute spur, as long as or longer than and parallel to the lower lip. Longitudinally dehiscing capsule. Selected material:— Abaíra, Campo de Ouro Fino, 15 February 1992, fl. and fr., R.M. Harley 52064 (HUEFS, NY, R); Mucugê, Chapada Diamantina, Fazenda Pedra Grande estrada para Bonimal, 17 February 1997, fl. and fr., E. Saar PCD5829 (ALCB); Rio de Contas, Pico do Itobira, 02 January 2003, fl., R.M. Harley 54539 (HUEFS). Comments:— Utricularia praelonga can be readily distinguished from all the other congeners in Bahia state by its basifixed and basally connate bracts and bracteoles with laciniate-denticulate margins, and yellow corolla with entire to shallowly trilobed lower lip. In the state, this species is found only in campos rupestres.Published as part of Guedes, Felipe Martins, Miranda, Vitor Fernandes Oliveira & Alves, Marccus, 2022, Diversity and distribution of Lentibulariaceae in Bahia state, Brazil: implications for phytogeography and conservation, pp. 213-255 in Phytotaxa 556 (3) on pages 239-240, DOI: 10.11646/phytotaxa.556.3.1, http://zenodo.org/record/697283
Acoustic emmission gedrag van verschillende grondsoorten
No full textDit rapport vat de resultaten samen van de meetrapporten "Acoustic Emission" (A.E.) gedrag van verschillende grondsoorten door ing. F.M. Schenkeveld, LGM en "Acoustic emission laboratory testing of sand, clay and peat soils" door Prof. R.M. Koerner, Drexel University, U.S.A. Het onderzoek werd verricht in opdracht van het Centrum voor Onderzoek Waterkeringen (COW), in samenwerking met het Laboratorium voor Grondmechanica (LGM). Projectleider voor het COW was ir. A. Penning. Het doel van het onderzoek is de evaluatie van de "acoustic emission"-methode met betrekking tot stabiliteitsproblemen bij Nederlandse dijken. Tijdens het vooronderzoek is kontakt gelegd met Prof. R.M. Koerner (R.M.K.), Drexel University, U.S.A. Om een goede basis te geven aan het onderzoek werd met Prof. Koerner een gezamenlijk project uitgevoerd. "Acoustic Emissions" zijn spanningsgolven die gegenereerd worden in een materiaal onder spanning tijdens deformatie. Soms zijn deze spanningsgolven hoorbaar (kraken van hout), maar vaak niet vanwege de lage amplitude en hoge frequentie. Een piezoelectrische sensor wordt gebruikt om de "acoustic emissions" te detecteren. De opnemer produceert een electrisch signaal evenredig met de amplitude van de waargenomen trilling. Het signaal wordt dan versterkt, gefilterd en geteld of op een andere wijze gekwantificeerd. Achtergrondruis en andere ongewenste verstoringen worden gefilterd of apart gekwantificeerd en afgetrokken van de resultaten. De tellingen of andere bewerkte resultaten van de emissies worden dan gecorreleerd met het materiaal gedrag om empirisch de veiligheid van de onderzochte situatie te bepalen. Indien er geen acoustic emissions zijn is het materiaal in het algemeen in rust en stabiel. Evenwel als er emissies worden waargenomen is het materiaal in beweging, hetgeen uiteindelijk kan leiden tot bezwijken. De komponenten van het huidige "acoustic emission" systeem bestaan uit: een stalen staaf (om het signaal vanuit de grond naar een geschikt waarnemingspunt te brenger.) , een sensor (geofoon, versnellingsopnemer,hydrofoon of een andere opnemer die een mechanische trilling in een electrisch signaal omzet), een voorversterker (om het signaal te versterken indien een lange kabel wordt gebruikt), filters (om ongewenste gedeelten van het signaal te elimineren), een versterker (om het signaal verder te versterken voor signaalbewerking) en een signaalbewerkingssysteem. Het signaalbewerkingssysteem is over het algemeen een teller die telt als een bepaalde drempelwaarde wordt overschreden.TAW/EN
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