Journal articles: 'String rios'

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Brocaneli, Pérola Felipette, and Monica Machado Stuermer. "Renaturalização de rios e córregos no município de São Paulo DOI: 10.5585/exacta.v6i1.799." Exacta 6, no. 1 (February 10, 2009): 147–56. http://dx.doi.org/10.5585/exactaep.v6i1.799.

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A cidade de São Paulo tem grande parte de suas áreas úmidas drenadas e aterradas. A ocupação das várzeas traz diversos problemas para o município, comprometendo a paisagem natural dos rios e córregos. Os problemas abrangem desde a interrupção dos processos ecossistêmicos até questões de drenagem superficial. A reabertura de alguns trechos dos rios e córregos do município talvez contribua para a conscientização ambiental dos paulistanos, principalmente a respeito da localização dos rios e da péssima condição das águas. A abertura dos canais como solução para o retardo do escoamento das águas superficiais tem sido avaliada como menos dispendiosa do que a construção e manutenção de piscinões. Este pode ser o início de um processo de valorização das áreas úmidas do município de São Paulo, mesmo que de maneira indireta.

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VACELET, JEAN. "Carnivorous sponges (Porifera, Cladorhizidae) from the deep South Pacific (New Caledonia) with the description of three new species of the genus Abyssocladia and remarks on genus Cercicladia." Zootaxa 4767, no. 2 (April 24, 2020): 257–76. http://dx.doi.org/10.11646/zootaxa.4767.2.3.

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Three new species of carnivorous sponges of the genus Abyssocladia (Demospongiae, Cladorhizidae), A. kanaconi, A. microstrongylata and A. mucronata, are described from the bathyal zone of the Tropical Southwestern Pacific, south of New Caledonia. They were collected in 2016 and 2019 during the KANACONO and KANADEEP 2 expeditions of the Tropical Deep-Sea Benthos program of the French Museum National d’Histoire Naturelle. A new record is reported for the cladorhizid Cercicladia australis Rios, Kelly & Vacelet, 2011, and the spicules of the holotype of the type species of Abyssocladia, A. bruuni Lévi, 1964 are illustrated.

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Elsayed, M. A. "A Novel Approach to Dynamic Representation of Drill Strings in Test Rigs." Journal of Energy Resources Technology 129, no. 4 (May 7, 2007): 281–88. http://dx.doi.org/10.1115/1.2790979.

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Drill strings are used in oil and gas production as well as geothermal wells. They experience destructive vibrations, many of which are highly dependent on drill string modes. In this paper, we show that the lowest frequency modes are not necessarily the most critical and we delineate a methodology for reducing the number of modes representing the drill string. The frequency response function and stability diagram are used as measures of dynamic similarity between the proposed model and the drill string. We also introduce a novel approach to represent a drill string in laboratory test rigs. This approach not only represents the drill string dynamics but also offers flexibility to modify, remove, or augment the modes representing the system. The underlying principle is that in a multi-degree-of-freedom in-series spring-mass system with Rayleigh damping, dynamic modes can be decoupled. Applying the force to the end node (bit), the modes can then be configured separately in a parallel arrangement where their contributions to bit displacement are added algebraically. A practical arrangement for this purpose is proposed in this paper. Construction of a test rig that accurately represents the drill string dynamics is critical to validation of any test data on bits, bottom hole assemblies, instrument subs, and so on.

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GUI, LING-JIAN, SHENG-BIN JIA, XIAN-LIN GUO, MEGAN PRICE, SONG-DONG ZHOU, and XING-JIN HE. "Tongoloa tagongensis (Apiaceae), a new species from the Hengduan Mountains, China." Phytotaxa 461, no. 1 (September 30, 2020): 12–20. http://dx.doi.org/10.11646/phytotaxa.461.1.2.

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Tongoloa tagongensis (Apiaceae), is proposed as a new species from the Hengduan Mountains in Sichuan, western China. It is most similar to T. elata, but the new species’ roots are short conic to tuberous, lower leaves 2–3-ternate/pinnate, rays 4–11, and ribs more obvious. Description and illustrations are provided.

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WATSON, CHARLOTTE, EKIN TILIC, and GREG W. ROUSE. "Revision of Hyalopale (Chrysopetalidae; Phyllodocida; Annelida): an amphi-Atlantic Hyalopale bispinosa species complex and five new species from reefs of the Caribbean Sea and Indo-Pacific Oceans." Zootaxa 4671, no. 3 (September 18, 2019): 339–68. http://dx.doi.org/10.11646/zootaxa.4671.3.2.

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The formerly monotypic taxon, Hyalopale bispinosa Perkins 1985 (Chrysopetalinae), is comprised of a cryptic species complex from predominantly tropical embayments and island reefs of the Western Atlantic and Indo-Pacific Oceans. Hyalopale species are of meiofaunal size (length: 1−2.8mm), but considered non-interstitial, with the majority of species inhabiting a singular habitat of shallow littoral zones among algae and epifauna overlying sediments in rubble. Hyalopale adults exhibit notochaetal fans characterized by the presence of lateral and midline notochaetal spines. Species of Hyalopale can be distinguished by the shape of glass-like notochaetal paleae and the number of densely stacked ribs. Hyalopale bispinosa forms a western and eastern Atlantic species complex, comprising the type species, Hyalopale bispinosa s.s., a comparatively larger form with the highest number of notochaetal paleael ribs from Florida, and Hyalopale cf. bispinosa, from the western and eastern Mediterranean, a smaller form with a similar notochaetal morphology to the latter. Unfortunately, no molecular sequence data is available for Hyalopale bispinosa s.s. Five new species are described, with molecular sequence data provided for three: Hyalopale leslieae sp. nov., a small form with a comparatively low number of paleal ribs, found from the Florida Keys to Belize, Caribbean Sea, H. zerofskii sp. nov. from southern California and Mexico, eastern Pacific and H. sapphiriglancyorum sp. nov., a distinctive species with the lowest number of paleael ribs, from Raja Ampat, Indonesia and the Great Barrier Reef, Queensland, western Pacific. Two other species are described from morphology alone: H. angeliensis sp. nov. from Dampier, Western Australia and Seychelle Islands, eastern Indian Ocean and H. furfuricula sp. nov. from the Red Sea and Mozambique, western Indian Ocean, possessing a unique paleal brow shape. While well supported as a clade, support for relationships within Hyalopale is low. Hyalopale cf. bispinosa (Mediterranean) was recovered as sister group to the remaining Hyalopale, with H. leslieae sp. nov. as sister to the Hyalopale Pacific clade, comprising H. zerofskii sp. nov. (eastern Pacific) and H. sapphiriglancyorum sp. nov. (western Pacific). Within Chrysopetalinae, Hyalopale and Paleanotus formed a clade that was the sister group to the other paleate chrysopetalids under maximum likelihood, though Paleanotus grouped with the other paleate forms under maximum parsimony. The adult morphology of Hyalopale species is compared with that exhibited in the larvae of Paleanotus species; based on these results, including possession of a shared notochaetal character, Hyalopale is considered to contain paedomorphic taxa.

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Tang, Xiaochao, Angelica M. Palomino, and Shelley M. Stoffels. "Reinforcement Tensile Behavior under Cyclic Moving Wheel Loads." Transportation Research Record: Journal of the Transportation Research Board 2363, no. 1 (January 2013): 113–21. http://dx.doi.org/10.3141/2363-13.

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Numerous studies have revealed the benefits of using geogrids in a flexible pavement, especially for reducing permanent deformation. One of the questions that remain about the effectiveness of a geogrid in reinforcing of pavement is the extent to which the geogrid is engaged and mobilized throughout its service. This paper presents results of a laboratory study on various geogrid products embedded in flexible-pavement sections. The laboratory-scale pavement sections were subjected to cyclic moving wheel loads by using reduced-scale accelerated pavement testing (APT). During the APT, strains that developed in the geogrids were measured at intervals of loading applications by strain gauges installed in pairs on the upper and lower surfaces of the geogrid ribs. Permanent deformation of the subgrade was also measured at the same intervals of loading applications. The measurements of geogrid strains throughout the construction process indicated that the construction resulted in a considerable prestressing effect on the geogrids. Measurements from the individual strain gauges in pairs showed that the gauges installed on the upper surfaces of the ribs were in compression while those on the lower surfaces were in tension; the situation suggested a significant effect on the flexural deflection of the ribs on the tensile strain measurements from the strain gauges. Furthermore, it was observed that geogrid ribs in the longitudinal direction of traffic loading were not mobilized, while considerable strains were developed in geogrid ribs in the direction transverse to traffic loading. A clear correlation was found between the reinforcing forces developed in the geogrids and the performance of the reinforced subgrade in relation to resisting permanent deformation.

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DE MATOS NOGUEIRA, JOÃO MIGUEL, and ADRIANO ABBUD. "Three new serpulids (Polychaeta: Serpulidae) from the Brazilian Exclusive Economic Zone." Zoosymposia 2, no. 1 (August 31, 2009): 201–27. http://dx.doi.org/10.11646/zoosymposia.2.1.16.

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Three new species of serpulids from Brazil are described herein, two of which were described, but not named, by Zibrowius are here considered as new species and given specific names. Vermiliopsis zibrowii sp. nov. is characterized by an operculum with a single endplate or several septa progressively nearer to each other towards the tip and which are separated by conspicuous ribs. Pseudovermilia harryi sp. nov. has an operculum with several septa separated by short ribs and its tube is different from similar congeners. Filogranula revizee sp. nov. has an operculum with a sunken funnel and, frequently, a slender, distally sharp spine. Comparisons between these three species and related species are provided

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GÜRDAL, BAHAR, HÜSEYİN ONUR TUNCAY, and H. AŞKIN AKPULAT. "Peucedanum akaliniae (Apiaceae), a new species from Southern Turkey." Phytotaxa 425, no. 3 (December 5, 2019): 145–53. http://dx.doi.org/10.11646/phytotaxa.425.3.4.

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Peucedanum akaliniae is described as a new species from Southern Turkey. It is similar to P. graminifolium, P. longifolium, P. ruthenicum and P. guvenianum. Diagnostic morphological characters are represented and compared with closely related species. It differs from related taxa by having long petioles with long fibrous collar, pinnate leaves, opposite-verticillate inflorescence, unequal rays and pedicels, number of bracts and white flowers, oblong-ovat fruit shape, dorsal vittae regularly 1–2 per vallecula and ribs, 1–3 vittae in the lateral wings and costas.

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CHEN, YOU-SHENG, LIAN-SHENG XU, and RUI KE. "Nabalus muliensis (Asteraceae, Cichorieae), a new species from China." Phytotaxa 416, no. 4 (September 18, 2019): 257–62. http://dx.doi.org/10.11646/phytotaxa.416.4.4.

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Nabalus muliensis (Asteraceae, Cichorieae), a new species from southwestern Sichuan, China, is described and illustrated. It is the third species of Nabalus occurring in China. The new species is similar to Nabalus tatarinowii in its paniculiform inflorescence, nodding capitula, 3–5 florets, cylindric involucre, achene with unequal ribs and pale brown pappus, but differs by its yellow florets (vs. purple, white or pink), leaf blade lyrate-pinnatilobate (vs. divided with 1–3 pairs of lobes), and achenes with a 2–3 mm long beak (vs. apex truncate). The new species is considered Endangered (EN) according to the IUCN Red List Categories and Criteria.

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CHU, SHAN-SHAN, DE-QUN WANG, HUA-SHENG PENG, and LU-QI HUANG. "Peucedanum huangshanense (Apiaceae), a new species from Anhui, China." Phytotaxa 430, no. 1 (January 23, 2020): 17–24. http://dx.doi.org/10.11646/phytotaxa.430.1.3.

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Peucedanum huangshanense, a new species discovered in Anhui, China, is illustrated and described. Detailed morphological comparisons have showed that it is similar to P. praeruptorum but differs from the latter by having larger compound umbels (5–14 cm across), rays up to 25, and long-ovoid mericarps with lateral ribs narrowly winged. To explore the phylogenetic position of this species, nuclear ribosomal DNA internal transcribed spacer (ITS) region was sequenced for P. huangshanense and P. praeruptorum collected in different places. The morphological and molecular evidences support the hypothesis that P. huangshanense is a new distinct species.

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GONZÁLEZ-ZAMORA, PEDRO, PABLO CARRILLO-REYES, and DANIEL SÁNCHEZ. "Acanthocereus paradoxus (Cactaceae), a new endemic species from Jalisco, Mexico." Phytotaxa 470, no. 2 (November 3, 2020): 145–54. http://dx.doi.org/10.11646/phytotaxa.470.2.3.

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Acanthocereus paradoxus sp. nov., an endemic narrow cylindrical cactus from the state of Jalisco is described and illustrated. The species can be distinguished by its narrow cylindrical mature stems, stem epidermis dull green with some dark green margins, the presence of four central spines, and a greater number of ribs and spines in young stems. A morphological comparison with the other cylindrical members of Acanthocereus and sympatric species of the genus is provided. Data about its habitat and the conservation status are also given.

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Spence, Richard B. "The Strange Case of Sergius Riis." International Journal of Intelligence and CounterIntelligence 15, no. 2 (April 2002): 222–42. http://dx.doi.org/10.1080/08850600252869047.

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KITAJIMA, ELLIOT W., ALINE D. TASSI, VALDENICE M. NOVELLI, SARA CACERES, ALCIDES AGUIRRE, NORMA COSTA, and GILBERTO J. DE MORAES. "Asymmetry in the number of solenidia on tarsi II of Brevipalpus (Acari: Tenuipalpidae) populations from Argentina*." Zoosymposia 6, no. 1 (December 20, 2011): 39–44. http://dx.doi.org/10.11646/zoosymposia.6.1.7.

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To verify the prevailing Brevipalpus species in citrus orchards affected by leprosis in Argentina, specimens of this genus were collected mainly from ‘Valencia’ and ‘Hamlin’ varieties of sweet orange plants from experimental and commercial plantations at Bella Vista, Corrientes Province, Concordia, Entre Rios Province and Saens Peña, Chaco Province. Examinations under light microscopy and scanning electron microscopy were carried out to identify the species based on external morphological characteristics. A mixture of typical Brevipalpus obovatus Donnadieu and Brevipalpus phoenicis (Geijskes) was found, with prevalence of the former (43.7 versus 27.2%) in the 327 adult females examined. However, 29% of the total number of females examined were atypical, having one solenidion (ù”) on one of tarsi II and two (ù’ and ù”) on the other, either left or right. To investigate whether this variation was also common elsewhere, several Brevipalpus populations of the obovatus species-group from Chile (Brevipalpus chilensis Baker), Brazil (B. obovatus and B. phoenicis), Costa Rica and Paraguay (B. phoenicis in both countries) were examined. Asymmetric numbers of tarsus II solenidia were found in 11 of the 1,993 examined adult female specimens of these populations. The results suggested a relation between the high proportion of asymmetric mites in Argentina and the occurrence of a mixed population of both B. obovatus and B. phoenicis; however, present knowledge about the apparently parthenogenetic system of reproduction of these species does not support the hypothesis that asymmetric mites could be the hybrids of those species. Thus, the factor leading to high proportions of asymmetric Brevipalpus in Argentina remains unknown.

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KLJUYKOV, EUGENE, DMITRY LYSKOV, ULIANA UKRAINSKAJA, TAHIR SAMIGULLIN, and ELENA TERENTIEVA. "Heracleum piliferum (Apiaceae), a new species from central Nepal." Phytotaxa 500, no. 3 (May 13, 2021): 166–78. http://dx.doi.org/10.11646/phytotaxa.500.3.2.

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A new species, Heracleum piliferum (Apiaceae), is described from the Annapurna mountain massif, central Nepal. The new species is related to H. forrestii and H. hemsleyanum and differs from them in dense pubescence of petioles, short triangular sheaths of stem leaves, 2-pinnate leaf blades, shallow notched terminal leaf segments, crenulate leaf margin, larger terminal umbels, and broadly winged lateral ribs of the mericarps.

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Strausbaugh, C. A., J. R. Myers, R. L. Forster, and P. E. McClean. "A Quantitative Method to Screen Common Bean Plants for Resistance to Bean common mosaic necrosis virus." Phytopathology® 93, no. 11 (November 2003): 1430–36. http://dx.doi.org/10.1094/phyto.2003.93.11.1430.

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A quantitative method to screen common bean (Phaseolus vulgaris) plants for resistance to Bean common mosaic necrosis virus (BCMNV) is described. Four parameters were assessed in developing the quantitative method: symptoms associated with systemic virus movement, plant vigor, virus titer, and plant dry weight. Based on these parameters, two rating systems (V and VV rating) were established. Plants from 21 recombinant inbred lines (RILs) from a Sierra (susceptible) × Olathe (partially resistant) cross inoculated with the BCMNV-NL-3 K strain were used to evaluate this quantitative approach. In all, 11 RILs exhibited very susceptible reactions and 10 RILs expressed partially resistant reactions, thus fitting a 1:1 susceptible/partially resistant ratio (χ2 = 0.048, P = 0.827) and suggesting that the response is mediated by a single gene. Using the classical qualitative approach based only on symptom expression, the RILs were difficult to separate into phenotypic groups because of a continuum of responses. By plotting mean percent reduction in either V (based on visual symptoms) or VV (based on visual symptoms and vigor) rating versus enzyme-linked immunosorbent assay (ELISA) absorbance values, RILs could be separated clearly into different phenotypic groups. The utility of this quantitative approach also was evaluated on plants from 12 cultivars or pure lines inoculated with one of three strains of BCMNV. Using the mean VV rating and ELISA absorbance values, significant differences were established not only in cultivar and pure line comparisons but also in virus strain comparisons. This quantitative system should be particularly useful for the evaluation of the independent action of bc genes, the discovery of new genes associated with partial resistance, and assessing virulence of virus strains.

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MENDOZA F., J. MOISES, PRISCILA ORLANDINI, and MÁRCIO LACERDA LOPES MARTINS. "Two new species of Manihot (Euphorbiaceae) from the Amazon region." Phytotaxa 453, no. 3 (July 23, 2020): 233–43. http://dx.doi.org/10.11646/phytotaxa.453.3.5.

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Two new species of Manihot endemic to the Amazon region are described here: Manihot australis and M. striata. Important diagnostic characters distinguishing the new species such as presence or absence of indumentum, form and size as well presence or absence of ribs in fruits, among other, are discussed and illustrated by line drawings and photographic plates. Information about their natural habitat and distribution is also provided.

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JIA, SHENG-BIN, XIAN-LIN GUO, SONG-DONG ZHOU, and XING-JIN HE. "Hansenia pinnatiinvolucellata is conspecific with H. weberbaueriana (Apiaceae) based on morphology and molecular data." Phytotaxa 418, no. 2 (September 24, 2019): 203–10. http://dx.doi.org/10.11646/phytotaxa.418.2.5.

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Hansenia pinnatiinvolucellata and H. weberbaueriana have been recorded to co-occur in Hengduan Mountains and adjacent regions. However, there were no reliable distinguishing characters to identify them. In our research, we explored key morphological characters through field work, specimen examinations and original literature reviews and reconstructed the phylogeny based on nuclear ITS regions, to determine the relationship between H. pinnatiinvolucellata and H. weberbaueriana. Morphological results indicated that the key, unique morphological characters (entire or pinnati bracteoles longer than pedicels and fruit with 3 ribs) of H. pinnatiinvolucellata were occurs simultaneously in some populations of H. weberbaueriana. Phylogenetic analyses also reveal that H. pinnatiinvolucellata and H. weberbaueriana are nested together. So, H. pinnatiinvolucellata should be a synonym of H. weberbaueriana.

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GILL, ANTHONY C., and STEFFI MICHALSKI. "Osteological evidence for monophyly of the Leiognathidae (Teleostei: Acanthomorpha: Acanthuriformes)." Zootaxa 4732, no. 3 (February 13, 2020): 409–21. http://dx.doi.org/10.11646/zootaxa.4732.3.4.

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Osteological characters supporting monophyly and identification of extant Leiognathidae are reviewed. Ten osteological synapomorphies support monophyly of the Leiognathidae, involving modification of the ribs, gill arches, palatoquadrate, median fins and branchiostegals. Fourteen additional characters are noted that nest the Leiognathidae within the Acanthuriformes (sensu Gill & Leis). Nine further characters are noted as useful for identification of leiognathids, though each occurs more widely among acanthuriforms and other fishes. Three fossil genera that have been assigned to the Leiognathidae are briefly reviewed for the various leiognathid characters. Only one fossil genus, †Euleiognathus Yabumoto & Uyeno, appears correctly placed in the family.

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ALMEIDA, ROBERTO BAPTISTA PEREIRA, GUILHERME MEDEIROS ANTAR, THAIS VASCONCELOS, LEIDIANA L. SANTOS, and BRUNO S. AMORIM. "Myrcia lucasae (Myrtaceae), a new species from the campo rupestre of Chapada Diamantina, Brazil." Phytotaxa 435, no. 3 (March 11, 2020): 227–34. http://dx.doi.org/10.11646/phytotaxa.435.3.2.

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Myrcia lucasae (Myrcia sect. Gomidesia, Myrtaceae), a new species from the Bahia state, Brazil, is here described and illustrated. It differs from M. lughadhae, a closely related and sympatric species, by the strigose indumentum with ferruginous trichomes and the absence of ribs on fruits. It is also different and from M. virgata (Myrcia sect. Myrcia), by presenting thecae with irregular dorsal openings (characteristics of Myrcia sect. Gomidesia). Collections of M. lucasae have been constantly misidentified as the morphologically similar M. virgata, a species from a different section, which does not occur in the state of Bahia. Myrcia lucasae is endemic to the highly diverse campo rupestre vegetation of the Chapada Diamantina biogeographic province. We also provide preliminary conservation assessment, comments on distribution and ecological aspects of this new taxon.

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Ortiz, Nilce, Evelyn Loures de Godoi, Lilian Polakiewicz, and Maria Aparecida Faustino Pires. "Monitoramento de águas de superfície densamente poluídas – O córrego Pirajuçara – localizado na Região Metropolitana de São Paulo DOI: 10.5585/exacta.v6i2.937." Exacta 6, no. 2 (May 7, 2009): 245–58. http://dx.doi.org/10.5585/exactaep.v6i2.937.

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Os córregos urbanos são sistemas dinâmicos, de elevada complexidade, que sofrem, continuamente, impactos dos despejos de indústrias e descargas domésticas, como o córrego Pirajuçara, localizado na região metropolitana de São Paulo. Este trabalho alia as medidas dos aspectos físicos, químicos e biológicos para avaliação da qualidade de água de córregos urbanos com eventos de enchente, que atravessa cidades com densa população. Para essa avaliação, desenvolveu-se um material adsorvente, que ficou imerso em águas urbanas poluídas, e foi submetido a uma série de análises que permitiram observar compostos tóxicos equivalentes aos existentes nos córregos analisados, principalmente quanto à presença de metais tóxicos, compostos orgânicos e eutrofização da água. Os resultados obtidos servem de apoio para estudos de outros rios, córregos, lagos e reservatórios densamente poluídos, localizados em áreas metropolitanas, como os córregos Aricanduva, Tamanduateí e tantos outros.

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METUSALA, DESTARIO, DEE DEE AL FARISHY, and MATTHEW JEBB. "Nepenthes putaiguneung (Nepenthaceae), a new species from highland of Sumatra, Indonesia." Phytotaxa 454, no. 4 (August 4, 2020): 285–92. http://dx.doi.org/10.11646/phytotaxa.454.4.6.

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A new species of Nepenthes—Nepenthes putaiguneung—from the highlands of Sumatra (Indonesia) is described and illustrated. This new species is morphologically similar with N. Singalana from which differs in having narrowly spathulate leaves, more gracile upper pitchers with a finely ribbed peristome, lacking teeth on its inner edge, lid with a basal crest and a short tooth-like triangular appendage near the apex on the underside (not lacking such appendages), the lid glands of lower pitcher confined to the midline (not scattered evenly over the whole surface), and pedicel of lower male flowers usually with minutely short bracteole. N. putaiguneung is also similar to N. mikei but differs in having narrowly spathulate leaves with obtuse apex, lower pitcher with slender infundibulate shape below and cylindrical above, peristome of lower pitcher with short and denser distinct ribs, lid of lower and upper pitcher with a prominent glandular crest at the base of midrib, several distinct glands on the lid of lower pitcher that clustered along the midrib; and pedicel of lower male flowers that usually with minutely short bracteole.

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Santos, Claudiana Gois. "Sapatão é revolução: Censura, erotismo e pornografia na obra de Cassandra Rios." Revista Periódicus 1, no. 7 (May 18, 2017): 263. http://dx.doi.org/10.9771/peri.v1i7.21782.

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Resumo: Um panteão de prostitutas, adúlteras, ninfetas e devassas lésbicas de toda ordem tem sido utilizado no leito da literatura “para ler com apenas uma das mãos”. Nota-se nesse tipo de narrativa o tom transgressivo que na história recente brasileira foi tomado como afronta à imposição de uma rígida moral por parte dos militares que estavam no poder. Considerada como uma das escritoras que mais evidenciou protagonistas lésbicas na literatura brasileira, Cassandra Rios tem uma vasta obra desconsiderada por parte da crítica canônica, relegando-a à subliteratura. Outra parcela da crítica enxerga suas obras como propagação de um discurso moralista a respeito da homoafetividade feminina. O consenso da crítica encontra-se apenas no fato de sua obra ser repleta de elementos eróticos e/ou pornográficos. Devido à grande produção da autora, o enfoque deste trabalho incidirá sobre as publicações do período entre 1964 e 1985, quando o estado brasileiro sofreu um golpe militar, que culminou em mudanças políticas e sociais e interferiu na produção artística e intelectual nacional. O presente artigo pretende discutir como Cassandra Rios, por meio de um discurso aparentemente popular, conseguia levar a um grande número de leitores questões sobre a subjetividade de uma parcela da população estigmatizada durante um tempo de censura rígida da produção literária.

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Oliveira, Márcio Joaquim Estefano de, Cássia Silveira de Assis, and Cássia Silveira de Assis. "Aderência do aço-concreto produzido com agregado reciclado DOI: 10.5585/exacta.v4i1.664." Exacta 4, no. 1 (March 12, 2008): 135–41. http://dx.doi.org/10.5585/exactaep.v4i1.664.

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As obras de construção civil (incluindo novas edifi cações, reformas e demolições), produzem uma quantidade considerável de resíduos de construção e de demolição (RCDs) que, geralmente, são descartados de maneira inadequada e sem critério, o que causa sérios problemas tanto ao meio ambiente quanto ao ser humano. Ao despejarem esses detritos em rios,beiras de estradas, terrenos próprios à agricultura, devido aos contaminantes presentes nesse material, como betume, sulfato de cálcio, tintas e solventes, o desequilíbrio provocado no ecossistema é muito grande. A utilização de agregado reciclado em pavimentos, em blocos, em concreto sem função estrutural e, mais recentemente, em concreto com função estrutural são algumas opções para atenuar os impactos ambientais. Atualmente, estudam-se propriedades do concreto obtido do agregado reciclado para que ele seja utilizado com segurança. Um dos aspectos que merecem atenção é a aderência deste tipo de concreto com o aço. Foram produzidos corpos-de-prova em concreto armado em que houve a substituição parcial de agregado natural por agregado reciclado e concreto armado convencional, assumido como referência. Os espécimes foram submetidos ao ensaio de tração para calcular a tensão de aderência, segundo as normas brasileiras. Apesar de apresentarem variações, os testes indicaram a possibilidade do uso de concreto armado resultante do emprego de agregado reciclado em projetos que demandem estruturas capazes de suportar tensões superiores a 25 megapascal (MPa).

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Tavassol, Panteha, Naweed Ahmed, Wakqas Kayani, Sahab Jamshidi, Suneil Bapat, and Ahmed Imamovic. "Transmission of Human Papillomavirus Without Sexual Contact." Revue interdisciplinaire des sciences de la santé - Interdisciplinary Journal of Health Sciences 6, no. 1 (November 13, 2016): 8–12. http://dx.doi.org/10.18192/riss-ijhs.v6i1.1346.

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Human papillomavirus (HPV) is one of the most common sexually transmitted infections. There are four common HPV strains: 6, 11, 16, and 18. Strains 6 and 11 cause genital warts, while strains 16 and 18 are asymptomatic in males and may progress to cervical cancer in females. Although uncommon, a small percentage of males and females have been diagnosed with HPV without previous sexual contact. In this case report, we discuss a case conducted on a 15-year-old South Asian male who contracted an unknown low-risk strain of HPV with no history of sexual contact. HPV is highly infectious, however in the majority of cases the immune system is able to clear the infection, preventing the appearance of genital warts. In cases such as these, it is important to help control the spread of viral infections. Several determinants of health are involved in and affect the transmission of HPV, including income and social status, social support networks, education and literacy, culture, social and physical environments, and health services. To aid in the prevention of HPV, sexual education should be taught at early ages within schools and the Gardasil® vaccine should be administered to both females and males at an early age to reduce the burden of disease and the incidence of HPV.

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Vermeij, Geerat J., Gregory S. Herbert, Francisco J. Vega, and María del Carmen Perrilliat. "Mexfusus rotundicostatus, a new genus and species of neogastropod from the Late Cretaceous of southern Mexico." Journal of Paleontology 78, no. 6 (November 2004): 1123–27. http://dx.doi.org/10.1017/s0022336000043924.

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Mexfusus rotundicostatus new genus and species is a neogastropod of uncertain affinities from the Late Cretaceous (Early Maastrichtian) Mexcala Formation of southern Mexico. It is characterized by strong, rounded, axial ribs, fine spinelets at the intersection of axial ribs and sharp spiral cords, subsutural cord, strong simple spiral cords, and an apparently smooth, glazed columellar lip. A possible second species is Peristernia conica Riedel, 1932 from the Coniacian of Cameroon.

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ERMILOV, SERGEY G., ELIZABETH A. HUGO-COETZEE, and ALEXANDER A. KHAUSTOV. "Malgacheliodes martensi spec. nov. (Acari, Oribatida, Licnodamaeidae) from South Africa." Zootaxa 4984, no. 1 (June 10, 2021): 357–67. http://dx.doi.org/10.11646/zootaxa.4984.1.26.

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The genus Malgacheliodes is recorded in South Africa for the first time. Malgacheliodes martensi spec. nov. is described from soil of Hogsback State Forest, Eastern Cape Province. Adults of the new species differ from those of Malgacheliodes guillaumeti by the presence of ribs and furrows in the aggenital region, bacilliform leg tracheae, rounded ventral keel on leg I femur and four pairs of notogastral setae (h1 absent); while its tritonymph differs from that of M. guillaumeti by the presence of five pairs of gastronotic setae (c1 absent). The generic diagnosis of Malgacheliodes is updated. The differences in morphology of the tritonymphal instar in Malgacheliodes and other genera of Licnodamaeidae are presented.

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BERTINI, L., M. BEGHINI, C. SANTUS, and A. BARYSHNIKOV. "Resonant test rigs for fatigue full scale testing of oil drill string connections." International Journal of Fatigue 30, no. 6 (June 2008): 978–88. http://dx.doi.org/10.1016/j.ijfatigue.2007.08.013.

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Gao, Xiufang, and Bengt Sunde´n. "Effects of Inclination Angle of Ribs on the Flow Behavior in Rectangular Ducts." Journal of Fluids Engineering 126, no. 4 (July 1, 2004): 692–99. http://dx.doi.org/10.1115/1.1778715.

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The flow behavior in rib-roughened ducts is influenced by the inclination of ribs and the effect is investigated in the present study by Particle Image Velocimetry (PIV). The local flow structures between two adjacent ribs were measured. The Reynolds number was fixed at 5800. The flow field description was based on the PIV results in planes both parallel and perpendicular to the ribbed walls at various locations. The rib angle to the main flow direction was varied as 30 deg, 45 deg, 60 deg and 90 deg. The ribs induce three dimensional flow fields. The flow separation and reattachment between adjacent ribs are clearly observed. In addition, the inclined ribs are found to alter the spanwise distribution of the streamwise velocity component. The streamwise velocity component has its highest values at the upstream end of the ribs, and decreases continuously to its lowest values at the downstream end. Strong secondary flow motion occurs over the entire duct cross section for the inclined ribs. The flow structures between two consecutive ribs show that the fluid flows along the ribs from one end of the ribs to the other end, and then turns back at the transverse center. Downwash and upwash flows are observed at the upstream end and downstream end of the ribs, respectively.

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Dániel, Vladimír, and Petr Koňas. "FEM effective suggestion of guitar construction." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 54, no. 2 (2006): 23–30. http://dx.doi.org/10.11118/actaun200654020023.

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Modal analysis of the whole guitar construction was performed. The results of eigenfrequencies were obtained. Stress in strings affects not only static loading of material, but also shift of eigenfrequencies. From obtained natural frequencies for solved spectrum such frequencies were used which coincides with assumed ribs new positions of ribs were suggested. Other ribs which do not carry out the mechanical function were removed. Also static reaction was evaluated and new position of ribs was adjusted. For final model new eigenfrequencies were computed and compared with previous ones. Significant changes were revealed in low frequencies (bellow 400 Hz) where fewer amounts of natural shapes were obtained. Approximately 50% were lost by adding of ribs. For chosen frequencies of equal temperament the harmonic analysis was performed. The analysis proved ability of oscillation for frequencies far of natural frequencies. The final model satisfies the requirement of minimization of static stress in material due to strings and allows very effective oscillation of top the guitar resonance board. In comparison with literature good agreement in amplitude size of front board and amount of modes in appropriate frequencies were achieved. Suggested model even offers higher amount of natural shapes in comparison with literature, namely in high frequencies. From additional comparison of eigenfrequencies and natural shapes the influence of ribs position on natural shapes was approved.

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GUSEV, EVGENIY S., and MAXIM S. KULIKOVSKIY. "Two new species of genus Mallomonas from swamp localities in Vietnam." Phytotaxa 468, no. 1 (October 23, 2020): 121–29. http://dx.doi.org/10.11646/phytotaxa.468.1.8.

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Two new species, Mallomonas punctostriata sp. nov. and Mallomonas collucata sp. nov., are described from Vietnam based on silica-scale morphology studied by means of transmission and scanning electron microscopy. Both species inhabits swamp areas. Mallomonas punctostriata belongs to section Striatae. Its scales have unique transverse rows, consisting of papillae, resembling transverse ribs of members of section Striatae. Mallomonas collucata belongs to section Annulatae. This species has small scales with hexagonal reticulation on the shield. Mallomonas punctostriata was found in Phu Quoc Island (Kien Giang Province) and Cam Ranh Peninsula (Khanh Hoa Province). Mallomonas collucata has been observed only in one site on Phu Quoc Island.

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Vashchilina, O., and I. Lebedyeva. "Some peculiarities of the drilling rigs elements movement." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 1-2 (2020): 57–60. http://dx.doi.org/10.17721/1812-5409.2020/1-2.9.

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This paper deals with investigatson of the process of drill bit whirling on the rough plane of the well bottom. Nonholonomic kinematic models of the mechanical interaction of contacting bodies with defects at the initial stage of system self-excitation are applied. On the basis of the results of experimental studies, it is believed that one of the main factors influencing on the whirlings vibrations is the geometry of the bit. The bit is considered to be an absolutely rigid ellipsoidal body, the well bottom surface is supposed to be a plane. The resulting oscillations are associated with spontaneous bending deformations of the drill string, which are accompanied by continuous contact of the bit and the rock. The equations of motion of the bit in the linear approximation are obtained. The analysis of the solution of the linearized equations is carried out, and the frequencies of the arising periodic motions are found. The forms of oscillations under different geometrical parameters of an ellipsoidal bit are analyzed. It is shown that the bit can rotate in backward direction, moving at angular velocities that exceed the angular frequency of the drill string. The research results can be used in the development of new types of drilling rigs.

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SILVA, GABRIEL S. C. "A new species of Phenacorhamdia Dahl 1961 (Siluriformes: Heptapteridae) from the Paranapanema River basin, southeastern Brazil." Zootaxa 4890, no. 2 (December 2, 2020): 275–82. http://dx.doi.org/10.11646/zootaxa.4890.2.8.

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A new species of Phenacorhamdia is described from Paranapanema River, Upper Paraná River basin, southeastern Brazil. The new species is distinguished from congeners by the combination of following characters 45−46 vertebrae; an entirely dark-brown body; nine pleural ribs; eight branched rays in upper lobe of caudal fin; seven branched rays in pectoral fin; 13 anal-fin rays with 9−10 branched; first basal radial inserted at the 13th vertebrae and eight branchiostegal rays.

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BOVE, CLAUDIA P., C. THOMAS PHILBRICK, and ARTHUR R. LOURENÇO. "A new species of Lophogyne s.l. (Podostemaceae) from the Amazonian savanna of Amapá, Brazil." Phytotaxa 474, no. 2 (December 1, 2020): 172–78. http://dx.doi.org/10.11646/phytotaxa.474.2.7.

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A new species of Lophogyne from a Brazilian Amazon savanna is described and illustrated. It is morphologically similar to the former Jenmaniella species, due to the presence of stems that arise from prostrate roots attached to the substratum, a gynophore at anthesis, and three prominent non-suture ribs per valve in the fruit, currently merged in Lophogyne s.l.. Lophogyne wilsonii can be distinguished from all others species of Lophogyne s.l. by the apical region of the roots unattached from the substratum. The conservation status is discussed and an identification key is presented.

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Verschoof, Ruben A., Dennis Bakhuis, Pim A. Bullee, Sander G. Huisman, Chao Sun, and Detlef Lohse. "The influence of wall roughness on bubble drag reduction in Taylor–Couette turbulence." Journal of Fluid Mechanics 851 (July 20, 2018): 436–46. http://dx.doi.org/10.1017/jfm.2018.515.

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We experimentally study the influence of wall roughness on bubble drag reduction in turbulent Taylor–Couette flow, i.e. the flow between two concentric, independently rotating cylinders. We measure the drag in the system for the cases with and without air, and add roughness by installing transverse ribs on either one or both of the cylinders. For the smooth-wall case (no ribs) and the case of ribs on the inner cylinder only, we observe strong drag reduction up to DR$=33\,\%$ and DR$=23\,\%$, respectively, for a void fraction of $\unicode[STIX]{x1D6FC}=6\,\%$. However, with ribs mounted on both cylinders or on the outer cylinder only, the drag reduction is weak, less than DR$=11\,\%$, and thus quite close to the trivial effect of reduced effective density. Flow visualizations show that stable turbulent Taylor vortices – large-scale vortical structures – are induced in these two cases, i.e. the cases with ribs on the outer cylinder. These strong secondary flows move the bubbles away from the boundary layer, making the bubbles less effective than what had previously been observed for the smooth-wall case. Measurements with counter-rotating smooth cylinders, a regime in which pronounced Taylor rolls are also induced, confirm that it is really the Taylor vortices that weaken the bubble drag reduction mechanism. Our findings show that, although bubble drag reduction can indeed be effective for smooth walls, its effect can be spoiled by e.g. biofouling and omnipresent wall roughness, as the roughness can induce strong secondary flows.

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Jung, Dong Won. "Round Shape Rib Forming by Roll Forming Process." Applied Mechanics and Materials 873 (November 2017): 37–41. http://dx.doi.org/10.4028/www.scientific.net/amm.873.37.

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Roll forming process, due to increased product performance, higher quality, and lower cost with other advantages, has been made suitable process to form any shapes in the sheets. In this paper stress, strain and thickness distribution in the steel galvanized hot coil commercial (SGHC) sheet with Round shape ribs formed by roll forming process was investigated by a Finite Element code, ABAQUS software. The stress and strain distributions are considered during forming. Since in round shape ribs the flow of material is easier than quadrilateral one, the Stress distribution was more uniformand thinning strain was concentrated in the ribs with maximum value of 14.5% while this value in quadrilateral shape rib forming is 15.5%. The results show that this method is applicable in reducing the thickness strain.

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Perchepied, L., and M. Pitrat. "Polygenic Inheritance of Partial Resistance to Fusarium oxysporum f. sp. melonis Race 1.2 in Melon." Phytopathology® 94, no. 12 (December 2004): 1331–36. http://dx.doi.org/10.1094/phyto.2004.94.12.1331.

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Fusarium oxysporum f. sp. melonis is responsible for Fusarium wilt of melon. Race 1.2 strains overcome two dominant resistance genes (Fom-1 and Fom-2) and are further divided into two types depending on the symptoms they cause, yellowing or wilting. Partial resistance to F. oxysporum f. sp. melonis race 1.2 was studied by using a recombinant inbred line (RIL) population that was developed by single seed descent from an F1 hybrid between ‘Isabelle’, a partially resistant line, and a susceptible line, ‘Védrantais’. Artificial inoculations were performed with a yellowing strain (TST) and a wilting strain (D'Oléon 8) and replicated in six locations. Disease reactions of the parental lines, controls, and RILs were scored using a 1-to-5 scale and by using the area under the disease progress curve (AUDPC). Phenotypic correlations were highly significant between the different locations and experiments. The heritability of the resistance was high, from 0.72 to 0.96, and 4 to 14 genetic factors were estimated to confer resistance to F. oxysporum f. sp. melonis race 1.2. Thirteen other strains were tested with an RILs subset. Some small strainspecific effects may be involved. These results contribute to a better understanding of the polygenic inheritance of the partial resistance to F. oxysporum f. sp. melonis race 1.2.

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Savidge, Rodney Arthur. "Chemistry of developing bordered-pit rims in balsam-fir trees." Botany 94, no. 5 (May 2016): 347–57. http://dx.doi.org/10.1139/cjb-2016-0002.

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Rims of bordered pits form on the primary walls of radially enlarged cambial derivatives prior to the onset of general secondary-wall formation. A recent report (Botany, 2014, 92(7): 495–511) raised the possibility that the chemical composition of the rim might be different from that of the secondary wall. To investigate this, early-stage nonfluorescent and late-stage autofluorescent rims were separated from cambial derivatives of Abies balsamea (L.) Mill. and purified to homogeneity by density-gradient centrifugation. Solid state nuclear magnetic resonance spectroscopy, Raman microspectroscopy, combined gas chromatography – mass spectroscopy, enzyme digestion, and chemical resilience data support the interpretation that cellulose alone is the microfibrillar polysaccharide of nonfluorescent early-stage rims. A lignin is additionally present in late-stage rims, and it evidently bonds with cellulose because rims are extraordinarily resistant to hydrolysis by either enzymes or strong acid.

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Gromadski, A. S., V. A. Gromadski, Vik A. Gromadski, and Yu I. Chumak. "Rationale for the sustainable operational parameters of drilling string rotations in rotary drilling rigs." Jornal of Kryvyi Rih National University, no. 47 (2018): 102–12. http://dx.doi.org/10.31721/2306-5451-2018-1-47-102-112.

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Li, Jing, Ya-Fei Jia, Chen-Xi Miao, and Ming-Xing Xie. "Discrete Element Analysis of the Load Transfer Mechanism of Geogrid-Ballast Interface under Pull-Out Load." Advances in Civil Engineering 2020 (October 10, 2020): 1–12. http://dx.doi.org/10.1155/2020/8892922.

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Geogrids have been extensively used in subgrade construction for stabilization purposes of unconfined ballast. Based on well-calibrated microparameters, a series of geogrid-reinforced ballast models with different geogrid sizes and particular structures were developed to reproduce the mechanical behavior of the geogrid under pull-out load in this paper. And the rationality of the DEM model is verified by comparing the evolution law pull-out force measured by laboratory tests and numerical simulations under comparable conditions. Moreover, the macro pull-out force and the internal force distribution of the geogrid were analyzed, and the contact force statistical zones of the particle system were divided accurately according to the results. Meanwhile, both the force transfer mechanism in the geogrid-ballast interface and the sectionalized strain of the geogrid were discussed. And results unveil that the pull-out load is transmitted along the longitudinal ribs to the transverse ribs, and nearly 90% of the load is transmitted to the contact network (in statistical zone 1) in front of the first transverse rib, resulting in strong interlocking between the particles occurs in statistical zone 1. And the second transverse rib is the strength dividing line between strong and weak contact forces. Then, additional pull-out tests on the control groups were conducted, and the sectionalized strain of the geogrid and the peak pull-out force, as well as the energy dissipation were systematically analyzed. In addition, the proposed method used in simulation holds much promise for better understanding of the reinforcement mechanism and further optimizing the performance of geogrid-reinforced structures.

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Peng, L. X., Yue-Ping Tao, Hong-Qiao Li, and Gui-Kai Mo. "Geometric Nonlinear Meshless Analysis of Ribbed Rectangular Plates Based on the FSDT and the Moving Least-Squares Approximation." Mathematical Problems in Engineering 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/548708.

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Based on the first-order shear deformation theory (FSDT) and the moving least-squares approximation, a new meshless model to study the geometric nonlinear problem of ribbed rectangular plates is presented. Considering the plate and the ribs separately, the displacement field, the stress, and strain of the plate and the ribs are obtained according to the moving least-squares approximation, the von Karman large deflection theory, and the FSDT. The ribs are attached to the plate by considering the displacement compatible condition along the connections between the ribs and the plate. The virtual strain energy formulation of the plate and the ribs is derived separately, and the nonlinear equilibrium equation of the entire ribbed plate is given by the virtual work principle. In the new meshless model for ribbed plates, there is no limitation to the rib position; for example, the ribs need not to be placed along the mesh lines of the plate as they need to be in FEM, and the change of rib positions will not lead to remeshing of the plate. The proposed model is compared with the FEM models from pieces of literature and ANSYS in several numerical examples, which proves the accuracy of the model.

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Xu, Heng Qiu, Ming Zhe Li, Lin Lin Li, Rui Zhang, Da Li Wang, Wei Liang, and Yu Jiang Shen. "Power Spinning Study of Thin-Walled 5A06 Aluminum Alloy Cylinder with Longitudinal and Hoop Inner Ribs for Manufacturing Engineering." Advanced Materials Research 583 (October 2012): 301–5. http://dx.doi.org/10.4028/www.scientific.net/amr.583.301.

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In this paper, a three-dimensional finite element model of power spinning 5A06 aluminum alloy cylinder with longitudinal and hoop ribs is established. It reveals the laws of the stress and strain distribution of the longitudinal and hoop ribs in the spinning process, provides a theoretical guidance for the further optimization of process parameters for manufacturing engineering. The 5A06 aluminum alloy cylinder validated testes are through three stages. The first is to study spinning forming of the ten longitudinal ribs. The second is to study spinning forming ten longitudinal ribs and a hoop combined rib. The third is to study spinning forming qualified samples with ten longitudinal ribs and four hoop combined ribs. Optimization aspect of the aluminum alloy reinforced spinning parameters are obtained through simulation analysis and experimental verification, to provide an ideal theoretical guidance for further material application and production.

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KLJUYKOV, EUGENE, ELENA TERENTIEVA, ULIANA UKRAINSKAJA, and DMITRY LYSKOV. "Notes on the genus Zeravschania (Apiaceae) with description of two new species from Afghanistan and Iran." Phytotaxa 425, no. 3 (December 5, 2019): 137–44. http://dx.doi.org/10.11646/phytotaxa.425.3.3.

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Two species of Apiaceae are described as new to science: Zeravschania khorasanica from the Khorasan Province, eastern Iran, and Z. podlechii from the Ghor Province, central Afghanistan. Zeravschania khorasanica is related to Z. regeliana and Z. scabrifolia, but differs in rigid remains of petioles and sheaths, deeply laciniate ultimate segments of leaves, and broad-keeled ribs of mericarps. Zeravschania podlechii differs from other species of the genus in multiple stems, short internodes, dichotomous branching, and an unusual life form (сushion plant). In addition, Z. knappii is transferred to the genus Dichoropetalum on the basis of morphological evidence.

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Fialko, S. Yu. "Stress–Strain Analysis of Thin-Walled Shells with Massive Ribs." International Applied Mechanics 40, no. 4 (April 2004): 432–39. http://dx.doi.org/10.1023/b:inam.0000034466.84371.54.

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Louzano, Paula, and Ariane Faria dos Santos. "Oportunidades de aprender matemática no Brasil, Chile e Estados Unidos." Estudos em Avaliação Educacional 28, no. 68 (August 31, 2017): 444. http://dx.doi.org/10.18222/eae.v28i68.4645.

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Este trabalho utiliza dados do Programme for International Student Assessment (PISA) 2012 do Brasil, Chile e Estados Unidos para analisar a oportunidade de os alunos de diferentes níveis socioeconômicos em aprender matemática, medida pela exposição a conceitos e problemas dessa disciplina. Os alunos brasileiros apresentam grandes desvantagens em relação aos demais na cobertura curricular e mesmo os alunos mais ricos apresentam baixa probabilidade de exposição curricular frente aos seus colegas dos outros países. Além disso, a probabilidade de nunca terem sido expostos a conceitos e problemas matemáticos aumenta à medida que os conceitos ficam mais complexos, assim como cresce a desigualdade entre os mais pobres e os mais ricos. Portanto, não só observamos grandes desigualdades entre ricos e pobres em suas oportunidades de aprender matemática, mas também baixa exposição curricular dos alunos brasileiros de modo geral.Palavras-chave: Oportunidade de Aprendizagem; Pisa; Ensino de Matemática; Currículo. Oportunidades de aprender Matemáticas en Brasil, Chile y Estados UnidosEste trabajo utiliza datos del Programme for International Student Assessment (PISA) 2012 de Brasil, Chile y Estados Unidos para analizar la oportunidad de que alumnos de distintos niveles socioeconómicos aprendan matemáticas, medida por la exposición a conceptos y problemas de tal disciplina. Los alumnos brasileños presentan grandes desventajas en relación a los demás en la cobertura curricular e incluso los alumnos más ricos presentan baja probabilidad de exposición curricular con relación a sus colegas de los demás países. Por otra parte, la probabilidad de que nunca hayan sido expuestos a conceptos y problemas matemáticos aumenta a medida que los conceptos se hacen más complejos, así como crece la desigualdad entre los más pobres y los más ricos. Por lo tanto, no solo observamos grandes desigualdades entre ricos y pobres en sus oportunidades de aprender matemáticas, sino también una baja exposición curricular de los alumnos brasileños en general.Palabras-clave: Oportunidad de Aprendizaje; Pisa; Enseñanza de Matemáticas; Currículo. Opportunities to learn Mathematics in Brazil, Chile and the United StatesThis paper uses data from the Program for International Student Assessment (PISA) 2012 of Brazil, Chile and the United States to analyze the opportunity of students from different socioeconomic backgrounds to learn Mathematics, assessed by the exposure to concepts and problems of this discipline. The Brazilian students present major disadvantages compared to the others in terms of curriculum coverage and even the richest students have a low probability of curriculum exposure compared with their peers from other countries. In addition, the likelihood of never having been exposed to mathematical concepts and problems increases as the concepts become more complex, and as inequality increases between the poorest and the richest. Therefore, not only do we observe large inequalities between rich and poor regarding their opportunities to learn Mathematics, but also a low curriculum exposure of Brazilian students as a whole.Keywords: Learning Opportunity; Pisa; Teaching of Mathematics; Curriculum.

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Authors, The. "Short Communications." Rivista Italiana di Ornitologia 84, no. 1 (March 20, 2015): 53. http://dx.doi.org/10.4081/rio.2014.228.

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Overwintering of Crane, Grus grus, within the Alpine arch Prima nidificazione accertata di assiolo Otus scops in provincia di Varese

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46

Jakubovskis, Ronaldas, Domas Valiukas, and Gintaris Kaklauskas. "Experimental and Numerical Study of Reinforcement Strains in RC Ties." Solid State Phenomena 322 (August 9, 2021): 100–105. http://dx.doi.org/10.4028/www.scientific.net/ssp.322.100.

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The importance of interaction between concrete and reinforcement for reinforced concrete (RC) mechanics is a known issue, yet its complexity enforces one to perform in-depth investigations at the microscopic level. In this paper, short RC ties with lengths less than transfer length of bond stresses were chosen to investigate contact zones between concrete and reinforcement. A three-dimensional finite element approach (Model-3D) with simplified geometry of ribs (rib-scale model) is modelled. Its effectiveness is checked against the results yielded by a number of double pull-out tests on RC prisms, where the strain distribution of the bars was measured with strain gauges. As it turns out, the considered model shows a good correlation with experimental data at different loading levels, and the most important factor describing the effectiveness is the geometry of ribs.

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Anderson, John, Roberto Quaas, Quigbin Chen, David Almora, Ricardo Vázquez, Juan Velasco, Citlali Pérez, and Gerardo Castro. "CHARACTERISTICS OF EARTHQUAKES IN THE MEXICAN SUBDUCTION ZONE ON STRONG MOTION ACCELEROGRAMS." Revista de Ingeniería Sísmica, no. 54 (December 19, 1996): 17. http://dx.doi.org/10.18867/ris.54.234.

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Aceelerograms recorded on the Guerrero, Mexico, strong motion accelerograph network illustrate the dependence of strong ground motion on the magnitude and the hypocenter distance. These data suppport the hipothesis that complexity in accelerograms at short distances arises from complexity at the source. The duration of strong shaking is controlled by the source dimension at short distances, and extended by wave porpagation effects as distance increases. Peak amplitudes (peak acceleration, velocity) saturate at different magnitudes at different distances. This change in shape of attenuation curves as magnitude increases can be explained by the trnasition of Green's functions from simple, short pulses at short distances to longer duration wave trains at large distances. Spectral amplitudes demonstrate scalin relations in which loe frequency amplitudes are proportional to seismic moment but high frecuencies increase much less rapidly. The beginnings of large earthquakes look like small earthquakes, consistent with a cascade model for the growth of large events. The mostrecent large earthquake, on sept. 14,995 (Mw=7.4) shows surprisingly weak peak accelerations.

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48

Evans, Michael. "Objectivity, Subjectivity and Statistical Evidence." Revue interdisciplinaire des sciences de la santé - Interdisciplinary Journal of Health Sciences 4, no. 1 (August 17, 2014): 10. http://dx.doi.org/10.18192/riss-ijhs.v4i1.1214.

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Introduction: Statistics has applications in many fields. The point behind all of these applications is that there are questions for which there is no obvious way that we can obtain definitive answers. The reason for this lies in variation, which can arise for many reasons, and this leads to uncertainty. The health sciences provides an excellent example of this as the variation among patients, such as physical, genetic and lifestyle characteristics, lead to different responses to a treatment for a health problem. We are then left with the questions of whether or not a treatment works and, if so, how well.

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49

De Broucker, Patrice. "Éducation et santé : construire des indicateurs en comparaison internationale." Revue interdisciplinaire des sciences de la santé - Interdisciplinary Journal of Health Sciences 4, no. 1 (August 17, 2014): 12. http://dx.doi.org/10.18192/riss-ijhs.v4i1.1215.

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Introduction: De nos jours, on traite souvent de l’éducation comme d’un sésame de l’accès à l’emploi – plus élevé est votre niveau de scolarité et meilleur est votre champ d’étude, meilleures sont vos chances d’obtenir rapidement un emploi stable, rémunérateur et gratifiant. Certes, c’est important et il y a là une considération que personne ne peut ignorer lorsque vient le moment de faire des choix d’orientation scolaire et de carrière. Mais il serait inconvenant de ne penser l’éducation et son rôle dans la vie qu’en de tels termes. L’éducation est source de nombreux autres bénéfices tant pour l’individu que pour la société.

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50

De Broucker, Patrice. "Education and Health: Building Indicators in International Comparison." Revue interdisciplinaire des sciences de la santé - Interdisciplinary Journal of Health Sciences 4, no. 1 (August 17, 2014): 20. http://dx.doi.org/10.18192/riss-ijhs.v4i1.1216.

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Introduction: Nowadays, we often analyze the benefits of education as a sesame to access employment – the higher your level of education and better your field of study, the better your chances of getting quickly a stable, well paid and rewarding job. Surely this is important and it is a consideration that nobody can ignore when it comes to making a choice of a pathway through school and a career. But it would be inappropriate to think of education and its role in life only in such terms. Education is a source of many other benefits both for the individual and for society.

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Journal articles on the topic 'String rios'

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