4 research outputs found
Thermal and dynamic range characterization of a photonics-based RF amplifier
No full textThis work reports a thermal and dynamic range characterization of an ultra-wideband photonics-based RF amplifier for microwave and mm-waves future 5G optical-wireless networks. The proposed technology applies the four-wave mixing nonlinear effect to provide RF amplification in analog and digital radio-over-fiber systems. The experimental analysis from 300 kHz to 50 GHz takes into account different figures of merit, such as RF gain, spurious-free dynamic range and RF output power stability as a function of temperature. The thermal characterization from -10 to +70 °C demonstrates a 27 dB flat photonics-assisted RF gain over the entire frequency range under real operational conditions of a base station for illustrating the feasibility of the photonics-assisted RF amplifier for 5G networks
Aegla platensis Schmitt 1942
No full textAegla platensis Schmitt, 1942 Diagnosis. Anterolateral spine of carapace reaching half of cornea; protogastric lobes moderately raised; rostrum very long in adults, carinate along its entire length; anterior angle of ventral margin of epimera 2 with spine; fourth thoracic sternite raised medially, with scale; proximal outer margin of moveable finger of cheliped bearing lobe with tubercle; palmar crest rectangular, little developed; inner margin of ventral face of ischium unornamented (Bond-Buckup & Buckup 1994). New records. ARGENTINA: Province of Tucumán: River Las Tiapas and Los Membrillos with Ruta 341, 26º 51 ' 19 "S, 65 º 25 ' 51 "W; 707 m, 09.xii. 2001,(UFRGS 3231, 2 M); Loc.Rio Noque, La Cascada, La sala Sr. Javier, FML 0 0 150 (togheter with A. humahuaca). Former distribution. ARGENTINA: Northern and central Province of Buenos Aires, eastern Tucumán, southeastern Catamarca, and southwestern Misiones. BRAZIL: Southwestern Santa Catarina, and Rio Grande do Sul, except its northeastern part. PARAGUAY: Colonia Independencia. URUGUAY: Departments of Colonia and Canelones (Bond-Buckup & Buckup 1994). Present distribution. ARGENTINA: Paraguay River system, Mar Chiquita system, Dulce River – central Province of Buenos Aires (?), eastern Tucumán, southeastern Catamarca, and southwestern Misiones. BRAZIL: Southwestern Santa Catarina, and Rio Grande do Sul except its northeastern part. PARAGUAY: Colonia Independencia. URUGUAY: Departments of Colonia and Canelones. Remarks. Bond-Buckup & Buckup (1994) identified lots MACN 20959 -1, 11857, 23171, and 25931, all from the La Plata River, as A. platensis. However, the first author, during a recent revision of the MACN collection, determined that these specimens are not A. platensis, but another, very similar species. In sampling in tributaries along the right bank of the La Plata River, Province of Buenos Aires, only A. uruguayana was recorded, corroborating the absence of records of A. platensis from the watercourses located in northern Buenos Aires Province. This resulted in changes in its geographical distribution in Argentina, in addition to the new records from the Province of Tucumán. There still remain doubts as to the statement of Schmitt (1942), who mentioned in his description of A. platensis that the lot was collected on “ Isla Flores, which may equally be located near Buenos Aires or in the Department of Canelones in Uruguay. Aegla platensis has been used as an experimental model in the laboratory as well as in the field (for a review see Bueno & Bond-Buckup 2000; Bueno et al. 2000; Bueno & Bond-Buckup 2004; Ferreira et al. 2005; Oliveira et al, 2007; Almerão et al. 2007).Published as part of Bond-Buckup, Georgina, Jara, Carlos G., Buckup, Ludwig, Bueno, Alessandra A. P., Pérez-Losada, Marcos & Crandall, Keith A., 2010, Description of a new species of Aeglidae, and new records of related species from river basins in Argentina (Crustacea, Anomura), pp. 18-30 in Zootaxa 2343 on pages 24-25, DOI: 10.5281/zenodo.19334
The social function of representation: an analysis of the documentary representation about women and feminisms in the knowledge organization
No full textA Ciência da Informação é responsável pelas manifestações concretas do conhecimento produzido por determinados grupos de domínios do conhecimento (CAPURRO, 2003), as mulheres são um grupo que tem em comum a vivência do feminino socialmente construído, como a linguagem, dimensões culturais, sociais e histórias. Entendendo a perspectiva de gênero noque se trata da mulher, a ciência da informação concede espaços para a representação plural e expressão de gênero nos sistemas de recuperação da informação. Levando isso em consideração, com esse trabalho pretende-se analisar a base bibliográfica, com destaque para os fundamentos teórico-metodológicos, e as perspectivas de pesquisas que contemplam a representação do domínio “mulheres e feminismos” na Organização do Conhecimento. Para isso foram propostos os seguintes objetivos específicos: a) compreender quais são os autores que constituem o referencial teórico dos estudos sobre mulheres e feminismos no campo da Organização do Conhecimento; b) verificar e comparar as metodologias empregadas na produção de estudos sobre mulheres e feminismos no campo da Organização do Conhecimento; c) identificar quais são as perspectivas futuras de estudos sobre o domínio do feminismo na Organização do Conhecimento. Sendo assim, este estudo mapeia o que se tem publicado na literatura científica acerca do domínio mulheres e feminismos nas linguagens documentárias e sistemas de organização do conhecimento. Foi utilizado o método de revisão de literatura. Aidentificação do corpus documental intermediário se deu pelas seguintes basesde dados: a) Library, Information Science e Tecnology Abstracts (LISTA); b) Scopus; c) Web of Science; d) Base de Dados Referenciais de Artigos de Periódicos em Ciência da Informação (BRAPCI) e pelos anais de congresso doCongresso Brasileiro em Organização do conhecimento, e os anais do Encontro Nacional de Pesquisa em Ciência da Informação (ENANCIB). Com a cobertura cronológica de 2011-2023. Foram encontrados 619 artigos que compuseram o corpus de análise intermediário, e com a aplicação dos critérios de exclusão o corpus de análise final foi composto por quatorze textos. Para o cumprimento doobjetivo “a” foi realizada um levantamento bibliográfico das referências utilizadas para entender como se constitui a base bibliográfica sobre mulheres e feminismos na ciência da informação. Para o cumprimento dos objetivos “b” e “c” foi utilizada a metodologia de análise terminológica de Cabré (1993). A autora Hope A. Olson foi a que mais apresentou mais referências citadas pelo corpus selecionado, com incidência de 27 ocorrências, sendo apenas três artigos com incidência de três citações. Se tratando das metodologias utilizadas no domíniomulheres e feminismos, foram identificadas 6 metodologias utilizadas nas quais, a “análise de sistemas de organização do conhecimento” foi a mais utilizada. Se tratando as perspectivas de pesquisa no campo, a maioria dos autores ressalta pesquisas em que se prioriza identificar a desigualdade de gênero e abordar assuntos como a ética nos sistemas de organização do conhecimento e a melhoria das representações terminológicas.Information Science is responsible for the concrete manifestations of knowledge produced by certain groups of knowledge domains (CAPURRO, 2003), women are a group that has in common the experience of the socially constructed feminine, such as language, cultural, social dimensions and Stories. Understanding the gender perspective when it comes to women, information science gives spaces for plural representation and gender expression in information recovery systems. Taking this into consideration, with this work it is intended to analyze the bibliographic base, especially the theoretical- methodological foundations, and the prospects for research that contemplate the representation of the domain “women and feminisms” in the organization of knowledge. For this, the following specific objectives were proposed: a) to understand which authors constitute the theoretical framework of studies on women and feminisms in the field of knowledge organization; b) Verify and compare the methodologies employed in the production of studies on women and feminisms in the field of knowledge organization; c) Identify what are the future perspectives of studies on the domain of feminism in the organization of knowledge. Thus, this study maps what has been published in the scientific literature on women and feminisms in documentary languages and knowledge organization systems. The literature review method was used. The identificationof the intermediate documentary corpus was due to the following databases: a) Library, Information Science and Technology Abstracts (list); b) scopus; c) Web of Science; d) Referential database of journal articles in Information Science (BRAPCI) and the Annals of Congress of the Brazilian Congress in Knowledge Organization, and the annals of the National Meeting of Information Science Research (ENANCIB). With the chronological coverage of 2011-2023. There were 619 articles that composed the intermediate analysis corpus, and with the application of the exclusion criteria the final analysis corpus was composed of fourteen texts. To comply with the “A” objective, a bibliographic survey of the references used to understand how the bibliographic basis on women and feminisms in information science was constituted. To fulfill the objectives “B” and “C” the methodology of terminological analysis of Cabré (1993) was used. Author Hope A. Olson was the one that most presented the most references cited by the selected corpus, with an incidence of 27 occurrences, with only three articleswith three citations incidence. When it comes to the methodologies used in the domain women and feminisms, 6 methodologies used were identified in which “the analysis of knowledge organization systems” was the most used. In the caseof research perspectives in the field, most authors emphasize research in which it is prioritized to identify gender inequality and address issues such as ethics inknowledge organization systems and the improvement of terminological representations.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CNPq: 30575/2021-
Cuphea gracilis Kunth 1824
No full text<p> <b>11.</b> <i>Cuphea gracilis</i> Kunth (1824: 199).</p> <p> <i>Cuphea gracilis</i> var. <i>orinocensis</i> Saint-Hilaire (1833: 100). <i>Cuphea gracilis</i> var. <i>media</i> Koehne (1877: 284).</p> <p> Lectotype (designated by Lourteig 1987: 25):— VENEZUELA. [Amazonas]: “crescit prope Atures, locis arenosis (Orinoco [river]) [approx. 5.612, -67.614]”, May 1800, <i>Humboldt & Bonpland 857</i> (P [00679419] image!, isolectotypes B image!, K [fragm.] image!). Figs. 11A–F, 18.</p> <p> <i>Cuphea multicaulis</i> Koehne (1877: 228). Lectotype (first step designated by Lourteig 1987: 25, <b>second step lectotypification here designated</b>):—[COLOMBIA]. [Vichada]: “ad cataractas Maypures [approx. 5.243, -67.852]”, June 1854, <i>Spruce 3727</i> (P [01901646] image!, isolectotypes BM, F [fragm.] image!, K image!, P [01901647] image!).</p> <p> <i>Cuphea pauciflora</i> Koehne (1903: 132). Lectotype (<b>here designated</b>):— VENEZUELA. “Cuchivero, am Fusse der grossen Stromschnellen”, <i>Selwyn auf der Exp. Passarge n. 809</i> ([illustration] “ <i>C. pauciflora</i> ” in Koehne, Atlas Lythracearum, ined., Gray Herbarium: pl. 75. 1902).</p> <p> <b>Subshrubs</b> 30–50 cm tall; stems erect to decumbent, indumentum strigose and pubescent, one-armed trichomes, and short eglandular trichomes, <0.5 mm long, with curved apices, sometimes concentrated in a longitudinal band along the stem; internodes 0.7–3 cm long; brachyblasts absent. <b>Leaves</b> opposite, membranaceous, petioles ca. 1 mm long, blades 8–30 × 2.5–5 mm, narrow-ovate, apex acute, base acute to obtuse, margin plane to subrevolute, indumentum strigose on both surfaces; hyphodromous, secondary veins rarely visible. <b>Racemes</b> 10–22 cm long, bracteose, simple to compound, elongated, distinct; bracts 3–13 × 1–3 mm, subequal pairs, similar to leaves in shape and indumentum. <b>Flowers</b> alternate; pedicels 2–5 mm long; bracteoles 0.6–0.7 mm long, ovate; floral tubes 6–7 mm long; spur obtuse, deflexed; outer surface purple, indumentum pubescent, mixed with sparse glandular trichomes; inner surface villous behind the stamens, pilose on the rest of the floral tube; petals 6, purple to magenta, subequal, two dorsal 3–3.2 × 1.2– 1.7 mm, obovate, four ventral 2.7–3.4 × 1.2–1.6 mm, obovate; stamens free in the upper third of the floral tube, five antesepalous exserted, four antepetalous subexserted; pistil ca. 3.2 mm long; ovary glabrous; style pilose to glabrous; ovules 3; nectary ca. 0.6 × 0.7, deflexed. <b>Seeds</b> 2–3, 2 × 1.7–1.9 mm, elliptic to obovate, apex retuse, base acute to obtuse, margin obtuse.</p> <p> <b>Phenology:</b> —Collected with flowers and fruits in May, June, July, and September.</p> <p> <b>Distribution and habitat:</b> — Colombia, in department of Vichada, and Venezuela, in Amazonas state (Fig. 18) (Lourteig 1987, 2007); granite outcrops on riverbanks, and Amazonian savannas; 60–80 m elev.</p> <p> <b>Conservation status:</b> — <i>Cuphea gracilis</i> was categorized as Endangered (EN) B1ab(i,ii,iii)+2ab(i,ii,iii), with an estimated EOO of 500 km ² and AOO of 24 km ². It is a narrowly endemic species, whose populations are threatened by massive hydroelectric projects in the rivers where the species is found (Funk <i>et al.</i> 2007).</p> <p> <b>Specimens examined:</b> —COLOMBIA. <b>Vichada</b>: [Cumaribo], Maipures, plantes des bords de l’Orénoque, <i>Chaffanjon 514</i> (P image!). VENEZUELA. <b>Amazonas</b>: savane d’Atures, plantes des bords de l’Orénoque, 12 June 1887, <i>Gaillard 23</i> (P!); [Atures], Puerto Ayacucho, great rapids of the Orinoco, cristalline laja, 1–1.5 km east of Hotel Amazonas, 07 September 1953, <i>Maguire et al. 36053</i> (P image!); Atures, carretera Puerto Ayacucho-Sanariapo [Samariapo] desde Pto. Ayacucho hasta el Km 35 hacia Sanariapo [Samariapo], en sabana llanera con bosques ocasionales, cerca de la carretera, 6–19 July 1969, <i>Bunting et al. 3500</i> (P image!); [Atures], Puerto Ayacucho, between the electric power plant and the Rio Orinoco, 05º40’00”N, 67º37’00”W, 23 June 1984, <i>Davidse & Miller 26439</i> (P!); Atures, Parque Sucre, on rocky igneous savanna slope just south of Puerto Ayacucho, 05º43’00”N, 67º37’00”W, 08 September 1985, <i>Steyermark et al. 131594</i> (P!); Atures, Rio Sipapo, 5 km de su desembocadura al Rio Orinoco, Cerro Caldero, 05º01’00”N, 67º46’00”W, 17 May 1992, <i>Groger & Barcroft 408</i> (P image!).</p> <p> <i>Cuphea gracilis</i> is characterized by narrow-ovate leaves (Fig. 11B) and long, distinct bracteose racemes (Fig. 11A). It occurs in the border between Venezuela and Colombia, in the granite outcrops on the banks of the Orinoco river and its tributary, the Sipapo river, and in adjacent savanna regions. <i>Cuphea gracilis</i> is morphologically close to <i>C. carajasensis</i>, but can be distinguished by the glabrous ovary, with the villous indumentum present only on the inner surface behind the stamens. In <i>C. carajasensis</i>, the dorsal region of the ovary is densely villous, and is restricted to habitats with ironstone outcrops in the state of Pará, Brazil (Cavalcanti <i>et al.</i> 2016).</p> <p> There are five varieties related to <i>C. gracilis</i>, two described by Saint Hilaire (1833) (<i>C. gracilis var. brasiliensis</i> Saint-Hilaire [1833: 100] and <i>C. gracilis</i> var. <i>orinocensis</i>) and three by Koehne (1877) (<i>C. gracilis</i> var. <i>major</i> Koehne [1877: 284], <i>C. gracilis</i> var. <i>media</i> and <i>C. gracilis</i> var. <i>minor</i> Koehne [1877: 284]). The typification and identity of these varieties are discussed below.</p> <p> In “ <i>Flora Brasiliae Meridionalis</i> ”,Saint Hilaire(1833) made a brief comment contrasting <i>C.gracilis</i> var. <i>orinocensis</i> from <i>C. gracilis</i> var. <i>brasiliensis</i>. There is the remark “ <i>(Humboldtiana)</i> ” right after the name “ <i>Orinocensi</i> ”. The author probably created this variety based on the type of <i>C. gracilis</i>, collected by F.W. von Humboldt and A.J.A. Bonpland. <i>Cuphea gracilis</i> var. <i>brasiliensis</i> was removed from this study because its identification is close to <i>C. retrorsicapilla</i> Koehne (1877: 279), from <i>C</i>. sect. <i>Euandra</i> subsect. <i>Oidemation</i> Koehne (1883: 395, 399) (see discussion in Graham & Cavalcanti 2013).</p> <p> <i>Cuphea gracilis</i> var. <i>media</i> has also been described based on the collection of F.W. von Humboldt & A.J.A. Bonpland, among other specimens (Koehne 1877). However, Lourteig (1987) made a mistake in lectotypifying this variety under “ <i>Spruce 3728</i> ”, since this material is cited by Koehne (1877) for <i>C. gracilis</i> var. <i>minor</i> together with “ <i>Karsten s.n</i>.”. Furthermore, the latter two collections are correctly identified as <i>C. odonellii</i>, thus <i>C. gracilis</i> var. <i>minor</i> was synonymized here under this species.</p> <p> <i>Cuphea gracilis</i> var. <i>major</i> was considered as a synonym of <i>C. antisyphilitica</i> var. <i>acutifolia</i> by Lourteig (1987), who cited a specimen “ <i>Riedel 920</i> ” in P as “ holotype ”. After analyzing the image of the specimen, it was concluded that its morphology is similar to that of members of <i>C</i>. sect. <i>Euandra</i> subsect. <i>Oidemation</i>, however, its identity has not yet been determined.</p> <p> Koehne (1903) placed <i>C. pauciflora</i> in <i>C</i>. sect. <i>Euandra</i> subsect. <i>Hilariella</i> Koehne (1881: 156), because of the length of the stamens and the habit, since he did not see the seeds (the shape of the seed margin is important for infrageneric classification). Lourteig (1987) considered <i>C. pauciflora</i> as a synonym of <i>C. gracilis</i> and commented that she only saw the illustration in Koehne’s unpublished Atlas (“ <i>Atlas Lythracearum</i> ”). In the protologue and illustration there are several striking characters of <i>C</i>. sect. <i>Trispermum</i> s.l., and of <i>C. gracilis</i>, such as delicate branches, long, bracteose racemes, 3 ovules, and vesicles absent. In addition, the collection locality of the type material is close to the occurrence area of <i>C. gracilis</i>. Finally, the species was kept here as a synonym of <i>C. gracilis</i>. In this revision, no specimen related to <i>C. pauciflora</i> was found in the herbaria examined. The species was then lectotypified here with the illustration of the original type material from Koehne’s unpublished Atlas, which includes details of the branches, floral tube in lateral view and in longitudinal-dorsal section, pistil, and nectary.</p>Published as part of <i>Facco, Marlon Garlet & Cavalcanti, Taciana Barbosa, 2023, Taxonomic Revision of Cuphea sect. Trispermum s. l. (Lythraceae), pp. 1921-1935 in Phytotaxa 588 (1)</i> on pages 1921-1935, DOI: 10.11646/phytotaxa.588.1.1, <a href="http://zenodo.org/record/7751590">http://zenodo.org/record/7751590</a>
