bluuebunny/crossref_metadata_2025 huggingface dataset:
Pine seed removal in fragments of three temperate plant communities
Authors: Flores-Peredo Rafael , Sánchez-Velásquez Lázaro Rafael , Bolívar-Cimé Beatriz del Socorro
Published: November 2016

Background: Foraging strategies may vary among guilds of granivores and impact the tree recruitment and biodiversity of plant communities.

Hypothesis : The hypotheses were: during the night in areas with tree cover rodents will be the main seed removers, insects in open areas at night, and birds in all types of plant communities during the daytime.    

Studied species/Data description/Mathematical model: The seed removal by birds, rodents and insects was studied in a Mexican temperate forest. In order to detect differences in seed removal of Pinus patula , P. pseudostrobus , P. teocote and P. montezumae, a GLMM model with three way interaction (type of plant community, exclusion treatment and period) was carried out for each pine seed species where random variables were the variation among sites and months. 

Study site and years of study: This study was carried out in a Mexican temperate forest during February 2006 and January 2007.

Methods : Through exclusion treatments we evaluated the seed removal of four pine species in three plant communities with two replicates (1 ha approximately) and two periods.

Results : The three-way interaction was significant for all pine species ( P < 0.001) (GLMM processes). The variance was greater among sites than between months. The main seed removers for all pine seed species, were: At night insects for subalpine grassland; during the daytime birds for all plant communities, and at night the rodents in pine forest, oak-alder forest and finally in the subalpine grassland.   

Conclusions : The rodents were the main seeds removers in areas with tree cover during the night, the insects in open areas at night, and birds in all plant communities during the daytime.
Nuevas localidades de algunas plantas
Authors: Paray Ladislao
Published: November 2016

Se describen nuevas localidades de algunas plantas
Señor Dr. Phil. Carlos Reiche
Authors: Roldán Angel
Published: November 2016

Breve semblanza el Dr. Phil. Carlos Reiche, profesor de Botánica en la Alta Escuela de la Universidad Nacional de México, durante los años de 1911-1920.
Eizi Matuda y la flora de Chiapas, México
Authors: Ernández-Xolocotzi Efraím
Published: November 2016

Breve narración de la trayectoria de Eizi Matuda, y su contribución al conocimiento de la flora de la región de Chiapas, México
El árbol de papel en el México antiguo
Authors: Reko B.P.
Published: November 2016

Anotaciones taxonómicas y descriptivas de varias especies
Apuntes sobre la flora de Guerrero
Authors: Reko B.P.
Published: November 2016

Parece inconcebible el gran número de especies nuevas o raras que pude coleccionar y que más tarde fueron depositadas en el U. S. National Museum en Wáshington. Si la cosecha botánica en esa zona tan limitada resultó tan rica en novedades, se pueden imaginar las grandes posibilidades de otros descubrimientos mediante exploraciones extensas en las vastas y poco visitadas zonas de este interesante Estado.
Orquídeas mexicanas...
Authors: Balme Juan
Published: November 2016

La familia de las orquídeas es una de las más extensas, y la mejor definida del reino vegetal, pasando ya de 15,000 las especies y variedades clasificadas.
El género Lamorouxia en México
Authors: Paray Ladislao
Published: November 2016

Este género fue establecido por Humboldt, Bónpland y Kunth a principios del siglo pasado y lo dedicaron a J. V. F. Lamouroux, profesor de Historia Natural en Caen, Francia. Bentham y Hooker también lo describen en el Prodromus de De Candolle y enumeran 18 éspecies en México. El género fue revisado en 1895 por los botánicos americanos Robinson Greenman, habiendo sido publicado su trabajo por el Gray Herbarium. Desde entonces ningún botánico se ha dedicado al estudio extenso del género, excepto Hunnewell, quien en 1939 publicó dos especies nuevas de Lamourouxia.
Exploraciones en la Sierra de Juárez
Authors: Paray Ladislao
Published: November 2016

Comúnmente refiere a dicha sierra como la de Juárez pero, en realidad, geográficamente se trata de la Sierra Madre oriental. Esta región apartada y de dificil acceso, se divide en varias partes. Sierra de Juárez se llama a la región alrededor de Ixtlán de Juárez, Natividad etc. De Talea de Castro se llama la Sierra de San Nolasco. De Taka a Villa Alta recibe el nombre de Sierra del Distrito de Villa Alta. Adelante de Villa Alta a Choapán y más abajo hacia la costa es la del Distrito de Choapan. También se conoce la región con el nombre de La Chinantla. Los habitantes de la región son indígenas que pertenecen a los grupos étnicos de los Chinantecas, los Zapotecas y los Mijes.
Nuevas Dioscóreas de México
Authors: Matuda Eizi
Published: November 2016

Se describen 2 nuevas especies de Dioscorea.
La distribución de Fagus en México
Authors: Fox William , Sharp A.J.
Published: November 2016

Fagus no se había registrado en México hasta que el Prof. Maximino Martínez hizo su interesante descubrimiento en 1940 cerca de Zacualtipán, Hgo. Describió y denominó la especie Fagus mexicana en ese mismo año. A insinuación suya Sharp lo encontró en 1945 en el cerro de Tutotepec, cerca de Apulco del mismo Estado, siendo registrada por Miranda y Sharp. Más tarde, en 1950, los mismos autores, siguiendo las indicaciones del Sr. Byron Harrel la colectaron más al norte, en la sierra situada arriba de Gómez Farías, Tamps., habiendo sido registrada por Sharp, Hernánclez, Crum y Fox en 1951. En 1952 Sharp la encontró hacia el sur, cerca de Teziutlán, Pue.
Visita a Guanajuato
Authors: Gold Dudley B.
Published: November 2016

La ciudad de Guanajuato se encuentra a 2100 metros sobre el nivel del mar, rodeada completamente por cerros de mediana altura, alcanzando los inmediatos a la ciudad de 2500 a 2600 metros. Dichos cerros, ahora casi desprovistos de árboles estuvieron antiguamente, según se dice, cubiertos por extensos bosques de encino. El clima es templado y parece que hace menos frío que lo que corresponde a su altura; debido probablemente a la protección de los cerros; sin embargo, no es fuerte el calor. En el campo hay bastante casahuate Ipomea murucoides y numerosos ejemplares de Myrtillocactus que suben los cerros hasta una altura de cerca de 2400 metros.
Hepatoprotective and Antioxidant Activity of Ethanol Extracts of Dipterocarpus turbinatus (Dipterocarpaceae) from Tripura
Authors: Biswas Diptanu , Shivraj Gouda T. , Gowrishankar Narayanswamy Lachmanan
Published: November 2016

Ethanol extracts from the bark of Dipterocarpus turbinatus (EEDT) was evaluated for its hepatoprotective activity by paracetamol and carbon tetrachloride induced hepatotoxicity in rats. Hepatotoxicity was done by using carbon tetra chloride (2ml/kg) and paracetamol (3gm/kg) in rats. 200mg/kg and 400mg/kg of ethanol extracts of D. turbinatus (EEDT) was used as test drugs while silymarin (50mg/kg) used as a standard. Blood was collected by retro orbital pluxes and various biochemical parameters were evaluated related to liver disorder. Various parameters like SGOT, SGPT, ALP, cholesterol, serum bilirubin and levels significantly decreased with the dose dependence manner for EEDT as compared to paracetamol and CCl4 induced hepatotoxicity in rats. Total protein level was significantly increasing to test drug treated group as compared to the toxic control. Anti oxidant potency of drug was determined by various in-vitro methods and the drug extracts have shown positive results. Therefore, we conclude that it can be used for the treatment of hepatic damage where anti oxidant property is supported for its hepatoprotective activity.
Deciphering soybean molecular stress response via high-throughput approach
Authors: Tyczewska Agata , Gracz Joanna , Kuczyński Jakub , Twardowski Tomasz
Published: November 2016

As a result of thousands years of agriculture humans created many crop varieties, which became the basis of our daily diet, animal feed and also industrial application. Soybean is one of the most important crops worldwide and because of its high economic value, the demand for soybean products is constantly growing. On the European continent, due to unfavorable climate conditions, soybean cultivation is restricted and we are forced to rely on imported plant material. The development of agriculture requires continuous improvements in quality and yield of crop varieties to changing or adverse conditions, namely stresses. To achieve this goal we need to recognize and understand molecular dependencies underlying plant stress responses. With the advent of new technologies in studies of plant transcriptomes and proteomes, now we have tools to fast and more precisely elucidate of desirable crop traits. Here we present an overview of high-throughput techniques used to analyze soybean’s responses to different abiotic (drought, flooding, cold stress, salinity, phosphate deficiency) and biotic (infection of F. oxysporum, cyst nematode, SMV) stress conditions on the level of transcriptome (mRNAs and miRNAs) and proteome.
Sequence characterization and polymorphism detectionin AQP7 gene of Murrah buffalo
Authors: Kumari Ragini , Ramesha K.P. , Kumar Rakesh , Divya Divya , Kumari Anjali , Sinha Bina , Gonge D.S.
Published: November 2016

Aquaporin 7 (AQP7) gene is a member of aqua-glyceroporins which transports glycerol and water to spermatids. The present study aimed to investigate the polymorphisms within exons 2, 3, 4, 5 and their flanking intronic regions in AQP7 gene of Murrah bulls. Genomic DNA was extracted from 69 Murrah bulls blood samples and was subjected to polymerase chain reaction- single strand conformation polymorphism (PCR-SSCP) analysis. PCR-SSCP analysis revealed a total of eight different variants for amplicons of exons 4 and 5. Amplicon of exon 4 revealed three different patterns viz. E4P1, E4P2 and E4P3 with the frequency of 0.30, 0.22 and 0.48, respectively. Analysis of exon 5 revealed five unique SSCP patterns viz. E5P1, E5P2, E5P3, E5P4 and E5P5, with the frequency of 0.10, 0.37, 0.20, 0.20 and 0.13, respectively. Sequence analysis showed 16 single nucleotide polymorphisms, 7 of which were observed in coding region. Amplicons of exons 2 and 3 showed monomorphic patterns. However, compared to the reference sequence of taurine cattle one transition (C6878T) in exon 3 and 4 transitions (G2099A, C2116T, A2117G, G6848C) in intron 2 were observed for all the bulls under study. The genetic variability identified in the AQP7 gene may serve as potential genetic marker(s) for semen quality traits in buffalo.
Study on the polymorphism of fibroblast growth facorreceptor (FGFR1) in sheep
Authors: Bai Jun Yan , Jia Xiao  Ping , Yang You Bing , Pang You. Zhi , Wang Yu Qin
Published: November 2016

The polymorphisms of fibroblast growth factor receptor (FGFR1) were detected in large-tailed Han sheep, small-tailed Han sheep, Yuxi fat-tailed sheep and Lanzhou large-tailed sheep by PCR product sequencing technology. The results showed that FGFR1 gene had 4 mutation sites in large-tailed Han sheep, small-tailed Han sheep, Yuxi fat-tailed sheep and Lanzhou large-tailed sheep, including T558C, G342A, G417A and G420A. FGFR1 gene sequences of different species clustering showed that sheep, buffalo and Tibetan antelope clustered together firstly, suggesting that the three phylogenetic species had a close relationship.
Detection of osteopontin transcript in seminal plasma and its association with post-freeze-thaw quality of cryopreserved spermatozoa in mithun (Bos frontalis)
Authors: Baruah K. K. , Dhali A. , Bora B. , Mech A. , Mondal M.
Published: November 2016

The study aimed to detect osteopontin (OPN) transcript in seminal plasma and to assess the relationship between the presence of the transcript and post-freeze-thaw quality of cryopreserved spermatozoa in mithun (Bos frontalis). Semen samples were collected from five adult bulls through rectal massage method and cryopreserved in tris-egg yolk-glycerol extender. OPN transcript was detected by RT-PCR in the RNA purified from seminal plasma. OPN transcript was found to be present consistently in three animals (OPN+) and absent in two animals (OPN-). Although, sperm viability and acrosomal integrity were found similar at different stages of cryopreservation in both the groups, tail abnormality after final dilution and, head and tail abnormalities after equilibration were found significantly (P less than 0.05) lesser in the OPN+ compared to OPN- animals. The results indicated that OPN is probably important in stabilizing sperm membrane that resulted in better resistance of sperm to cryopreservation process in OPN+ animals.
Cloning, Expression and Polymorphisms of the 3' UTR of Ovine NOBOX Gene
Authors: Jin H. G. , Zhou G. L. , Zhang L. C. , Song Y. F. , Cao Y.
Published: November 2016

The oocyte-specific transcription factor newborn ovary homeobox (NOBOX) plays essential roles in regulating various stages of oogenesis, folliculogenesis and early embryonic development. The nucleotide sequence of 3'-untranslated region (3’UTR) of the ovine NOBOX gene (Accession No. KM090856) is detailed in the present report. Semi-quantitative RT-PCR analysis demonstrated that the ovine NOBOX transcript was mainly expressed in ovary. Two single nucleotide polymorphisms (SNPs) were detected in 3’UTR of NOBOX gene and two restriction site for endonuclease NOBOX-AfaI and NOBOX-BalI had also been found. Moreover, for the first time an association was reported between NOBOX gene polymorphism and prolificacy traits in Small Tailed Han sheep. Marker-trait association analyses showed that the NOBOX-AfaI and NOBOX-BalI genotypes had significant effect on the litter size traits in small tailed han ewes (p less than 0.05). In conclusion, these preliminary results indicated that NOBOX-AfaI and NOBOX-BalI loci in NOBOX gene may be a potential marker for improving prolificacy traits in sheep.
Nucleotide variability in Beta 2 Microglobulin (b2M) gene and its association with colostral IgG levels in buffaloes (Bubalus bubalis)
Authors: Chaudhary Rajni , Kumar Subodh , Yathish H. M. , Sivakumar A. , Mishra Chinmoy , Kumar Amit , Chauhan Anuj , Sivamani B. , Sahoo N. R.
Published: November 2016

The present study was taken up to find out Beta 2 Microglobulin (b2M) gene variants and their association with IgG concentrations in colostrum of Murrah buffaloes. 40 newly parturated Murrah buffaloes dams were included in the present study. Polymerase chain reaction- single stranded conformational polymorphism (PCR-SSCP) technique was used to explore the polymorphism in b2M gene of buffaloes. The PCR-SSCP analysis and sequencing of different patterns obtained by silver staining of fragments pertaining to exon 1 through 4 and partial introns 1 through 3, revealed 9 SNPs which were further used to prepare the haplotypes. 7 different haplotypes were observed. Indirect ELISA was done to estimate IgG concentrations in colostrum (collected 1 hour before first milking) obtained from buffaloes. IgG levels in colostrum ranged from 11.22 to 185.1 mg/ml with a mean IgG concentration of 51.71 ± 5.99 mg/ml. The effect of different haplotypes was evaluated on IgG concentrations. The least square analysis of variance could not exhibit a significant effect of buffalo dam haplotype on colostral IgG concentration.
Towards settled cultivation from traditional jhum-A case study in Arunachal Pradesh, India
Authors: Pattanaaik S. K. , Hazarika B. N. , Pandey A. K. , Debnath P.
Published: November 2016

The shifting cultivation in Arunachal Pradesh is dynamic in nature and is known as ‘Jhum’. Upland rice is the main crop grown in mixture with maize, foxtail, finger millet, beans, cassava, yam, banana, sweet potato, ginger, chillies, vegetables, etc. in such system. The single crop of rice is preferred in the second year and this continues for 2-3 years and then it is left for fertility build up through regeneration of vegetation. The period is known as ‘fallow period’. But this leads to considerable soil erosion due to heavy intense rainfall instead of increasing its fertility. The fallow period has been reduced from 10-20 years to 5-7 years. Fortunately the mindset of the jhumias of East Siang district of Arunachal Pradesh, India has been changed. They cultivate citrus, bamboo and tache (wallichia) trees in these fallow lands, which not only prevent the land from soil erosion, but also give income even from a short fallow period. This is a little shift from the traditional practice towards a sustainable practice adopted by the jhumias. The paper presents the current scenario of settled cultivation from traditional jhum in reference to East Siang district of Arunachal Pradesh.
Diversidad y conservación de Catasetum (Orchidaceae: Catasetinae) en el Departamento de Santander, Colombia / Diversity and Conservation of Catasetum (Orchidaceae: Catasetinae) in Department of Santander, Colombia
Authors: Bonilla Morales Miguel Macgayver , Aguirre-Morales Adriana Carolina , López Toscano Holguer
Published: November 2016

ResumenEl género Catasetum posee distribución neotropical con centro de diversidad en la Amazonía Brasileña. Colombia es uno de los países más ricos en orquideoflora, sin embargo, también muy poco explorado. El objetivo de la presente investigación fue conocer la diversidad, distribución, conservación y especies con potencial uso en cultivo comercial de Catasetum para Santander y Colombia. Se registran 14 especies y un nuevo reporte para Colombia, C. tenebrosum. Estas han experimentado un proceso de cultivo y domesticación para la preservación y propagación del material con el propósito del manejo de colecciones privadas y comercialización. La distribución y riqueza inter específica se encuentra principalmente en los municipios asociados al Valle interandino del Magdalena medio, al igual que la modelación de nicho ecológico sumando la Cordillera Oriental flanco Occidental en la región del Piedemonte, entre un rango altitudinal de 50 a 1000 m.s.n.m. Se amplía la distribución y rango altitudinal de C. lucis, especie exclusiva de Santander y en este estudio no se encontraron poblaciones nativas de C. tricorne. En conclusión, Santander posee la mayor diversidad de Catasetum para Colombia, por lo que puede ser considerado centro de conservación in situ y ex situ de las especies del país. AbstractCatasetum has neotropical distribution and its diversity center is in the Brazilian Amazon. Spite of, Colombia being one of the richest countries in orchid flora, also it has been one of the least explored. For this reazon, the objective of this research was to understand the diversity, distribution, conservation and species with potential use in commercial cultivation of Catasetum to Santander Department and Colombia in general. 14 species and a new report for Colombia, C. tenebrosum were recorded. These plants have undergone a  process of cultivation and domestication, for the material preservation and propagation, with the aim to manage private collections and marketing. The Catasetum distribution and inter-species wealth is mainly related with municipalities of the interandino Middle Magdalena Valley, stands like ecological niche modeling, adding the Eastern Cordillera, Occidental flank in the region of Piedmont, between an altitude ranges of 50 to 1000 m. It marks the distribution and altitudinal range C. lucis, Santander exclusive specie. In this study the C. tricorne native populations were not found. In conclusion, the Santander Department has the greatest diversity of Catasetum in Colombia, so it can be considered a species conservation center in situ and ex situ in the country.
Dynamics of a System Associated with a Piecewise Quadratic Family / Dinámica de un sistema asociado a una familia cuadrática a tramos
Authors: LOPEZ BURITICA KAREN , Casanova Trujillo Simeón , Acosta Medina Carlos Daniel
Published: November 2016

AbstractThis paper presents a study, both in analytical and numerical form, of a discrete dynamical system associated with a piecewise quadratic family. The orbits of periods one and two are characterized, and their stability is established. The nonsmooth phenomenon known as border collision is present when there is a period doubling. Lyapunov exponents are calculated numerically to determine the presence of chaos in the system. ResumenPresenta un estudio analítico y numérico de la dinámica de un sistema discreto asociado a una familiacuadrática a tramos; se caracterizan las órbitas de período uno y dos, así como su estabilidad; se muestrala presencia del fenómeno no suave, conocido como bifurcación por colisión de borde cuando ocurre undoblamiento de período. Se hallaron numéricamente los exponentes de Lyapunov para detectar la presencia de caos en el sistema.
Síntesis y copolimerización de poliimidas a partir de aminas aromaticas mediante irradiación por microondas / Synthesis and Copolymerization of Polyimides From Aromatic Amines by Microwave Irradiation
Authors: Muñoz Prieto Efren de Jesús
Published: November 2016

ResumenSe sintetizo la amina aromática (4,40-(4,40-isopropilidendifenil-1-10-diioxi) dianilina), con el anhídrido 4,40 (4,40-(isopropilidendifenoxi) bis (anhídrido ftalico) (IDBPA)), para obtener una poliimida a la cual por medio de irradiación de microondas se le injerto a la cadena principal el monómero e-caprolactama. La poli (caprolactama) obtenida tiene buenas características terminas de acuerdo a los resultados de DSC Y TGA. La poliimida se caracterizó por las técnicas analíticas, espectroscopia infrarroja de transformada de Fourier (FTIR), análisis ermogravimétrico (TGA), calorimetría diferencial de barrido (DSC) y resonancia magnética nuclear 1HRMN. AbstractThe aromatic amine (4, 40- (4, 40-isopropylidene-diphenyl-1-10-diyldioxy) dianiline), was synthesizedwith the anhydride 4, 40(4, 40 (isopropylidene-diphenoxy) bis (phthalic anhydride) (IDBPA)), to obtain a polyimide which by microwave irradiation was grafted to the backbone a Caprolactam monomer. The poly (Caprolactam) obtained has good finish characteristics according to DSC and TGA results. The polyimide was characterized by instrumental techniques such as; Fourier Transform Infrared Spectroscopy (FTIR), Thermo Gravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC) and Nuclear Magnetic Resonance, 1HNMR.
Apresentação
Authors: Possenti Sírio
Published: November 2016

Apresentação do Caderno de Estudos Linguísticos
Desigualdade social, racismo e discurso: a circulação da fórmula consciência negra
Authors: Oliveira Helio
Published: November 2016

ste trabalho analisa a circulação da fórmula “consciência negra” no universo discursivo brasileiro contemporâneo, restringindo-se a um corpus constituído de textos oriundos do campo jornalístico informacional que retomam, reformulam ou combatem a fórmula em questão. O objetivo é investigar, a partir de procedimentos teórico-metodológicos da análise do discurso, especificamente aqueles relativos ao funcionamento das fórmulas discursivas, em que medida as demandas do movimento negro são re(a)presentadas pelas mídias do campo mencionado, tendo em vista as ocorrências da fórmula. Os resultados apontam para uma suposta invisibilidade da violência racial e para a atribuição de desigualdade socioeconômica como origem e causa das práticas racistas, nas poucas vezes em que estas últimas são mencionadas.
Uma análise de discurso materialista do tratado de educação ambiental para sociedades sustentáveis e responsabilidade global
Authors: Luca Andrea Quirino de , Lagazzi Suzy Maria
Published: November 2016

Esse artigo tem como perspectiva teórico-metodológica a Análise de Discurso de linha materialista. Seu objetivo é dar visibilidade para as injunções que determinaram a elaboração do Tratado de Educação Ambiental para Sociedades Sustentáveis e Responsabilidade Global (Tratado de EA), para permitir a releitura desse documento frente às condições de produção de hoje e, assim, fortalecer suas ações. Para tanto, apresenta as condições de produção, as principais marcas do texto e seus efeitos de sentido. O Tratado de EA é considerado um documento referência para a política pública federal de educação ambiental, e sua importância justifica essa análise. Apresentamos os pressupostos do referencial teórico-metodológico, o contexto de sua criação, a análise materialista, e terminamos o trabalho com algumas considerações de ordem teórico-analítica, abrindo as possibilidades de reflexão com novas perguntas. Pretendemos contribuir com um melhor entendimento sobre o discurso que sustenta a política pública de educação ambiental do Brasil.
Marie-Anne Paveau : Langage et morale. Une éthique des vertus discursives, éditions Lambert-Lucas, 2013, 303 pages.
Authors: Maingueneau Domenique
Published: November 2016

Resenha de "Langage et morale. Une éthique des vertus discursives", de Marie-Anne Paveau.
Apresentação
Authors: Galves Charlotte
Published: November 2016

Apresentação - v.58 - n.2 - 2016
Dona Ruth e Dona Dilma: reflexões sobre as marcas do discurso machista nos usos de um pronome de tratamento
Authors: Scalzilli Guilherme de Camargo
Published: November 2016

Este artigo pertence à linhagem de estudos que abordam as unidades vocabulares sob uma ótica discursiva. Através de instrumentos conceituais da Análise do Discurso de linha francesa, investigamos o uso do pronome dona em dois artigos opinativos de Carlos Heitor Cony publicados no jornal Folha de São Paulo. Mobilizando repertórios característicos de certa memória discursiva patriarcal, o tratamento dona produz efeitos de sentido opostos quando aplicado na referência a Ruth Cardoso e a Dilma Rousseff. Ao mesmo tempo, entretanto, essa discrepância revela pertencer às mesmas estruturas imaginárias que reproduzem e naturalizam socialmente o discurso machista.
O discurso político e a manipulação da opinião pública: estratégias de conquista e de exercício do poder
Authors: Assis André William Alves de
Published: November 2016

Resenha de "A conquista da opinião pública: como o discurso manipula as escolhas políticas." de Patrick Charendeau
Uma reconstrução do proto-mamoré-guaporé (família arawák)
Authors: Jolkesky Marcelo
Published: November 2016

Este artigo apresenta uma reconstrução fonológica do proto-mamoré-guaporé (PMGU), um dos ramos da família arawák, assim como uma reavaliação da sua classificação interna. Na seção 1 serão apresentadas as línguas que compõem o subgrupo em questão assim como os aspectos relevantes da estrutura fonológica destas línguas para este estudo. A seção 2 é um histórico da classificação interna do referido subgrupo. A seção 3 contém uma proposta de reconstrução de aspectos fonológicos, morfológicos e lexicais do PMGU. A seção 4 oferece uma análise dos reflexos evolutivos inferidos para cada uma das (proto-)línguas consideradas e uma reavaliação da classificação interna do referido subgrupo com base na concatenação das inovações diacrônicas observadas.
Who were the Antipa Jivaroans? A linguistic and ethnohistorical investigation of a forgotten tribe
Authors: Overall Simon E.
Published: November 2016

The ethnonym Antipa was commonly mentioned as one of the major lowland Jivaroan (also known as Chicham) tribes of north Peru in the late 19th and early 20th centuries, before disappearing both from the historical record and from the oral history of the modern Jivaroan groups. This work presents insights gained by approaching the sparse historical data from a linguistic perspective. Taking into account documented linguistic evidence, the possible etymology of the ethnonym, and evidence from oral tradition, it suggests tentative hypotheses regarding the origin and disappearance of the Antipa ethnonym.
La representación discursiva del desplazamiento de la lengua maya en la colonia San Marcos Nocoh, Mérida
Authors: Lozano Eyder Gabriel Sima , Escudero Moisés Damián Perales , Morales Julia Remedios Ríos
Published: November 2016

El objetivo de este trabajo es investigar las representaciones discursivas sobre el desplazamiento o mantenimiento del maya yucateco de mayahablantes bilingües en español de un barrio de clase baja de Mérida,Yucatán. Esta investigación es relevante a la luz de cambios positivos recientes en las actitudes hacia esta lengua indígena (Sima Lozano et al. 2014). Se investigó tanto la representación de la transmisión a los descendientes como la del uso del maya yucateco para funciones cotidianas. Para ello, se diseñó un estudio cualitativo, aplicando un cuestionario sociolingüístico. Se encontró que, si bien los hablantes reportan usar el maya yucateco para un gran número de funciones, en casi todas ellas se reporta una tendencia clara: más hablantes prefieren usar el español para realizarlas y menos hablantes prefieren el maya yucateco o la alternancia de códigos. Además, los informantes reportan que la transmisión intergeneracional es muy poco frecuente hacia los hijos e inexistente hacia los nietos.
Contribuições para a reconstrução do protopano
Authors: Barbosa Raphael Augusto Oliveira
Published: November 2016

Resenha sobre a tese de doutorado intitulada "Contribuições para a reconstrução do Protopano" (Oliveira 2014).
Antonio Candido, Antonio Cornejo Polar e a constituição de um pensamento latino-americanista
Authors: Cota Débora
Published: November 2016

Sob o projeto de constituição de um pensamento latino-americanista e da promoção da literatura e da cultura da América Latina foram realizadas, nos anos 70 e parte dos 80, uma série de atividades que impulsava o trânsito e evidenciava os contatos das produções da região. Entre os intelectuais participantes houveram importantes e frutíferos diálogos como o estabelecido entre Antonio Candido e Ángel Rama. Mas, estas aproximações entre Brasil e América hispânica também juntaram Brasil e os Andes, Antonio Candido e Antonio Cornejo Polar estiveram reunidos em muitos eventos e projetos durante este anos. O estudo analisa algumas destas atividades como a participação de Antonio Candido na Revista de Crítica Literária Latinoamericana e o uso da noção de "sistema literário" pelos dois críticos buscando evidenciar e ler as bases deste diálogo.
Trilhos que se bifurcam: formação e inserção entre Candido e Rama
Authors: Toro Eduardo Andrés Mejía
Published: November 2016

O dialogo intelectual entre Antonio Candido e Ángel Rama tem sido considerado em múltiplas ocasiões como metáfora da continuidade do processo de integração do pensamento latino-americano. Este artigo pretende contestar a pretensa sincronia de paradigmas desses autores à luz da contraposição proposta por Silviano Santiago entre o paradigma da formação e o paradigma da inserção. Busca-se questionar a plasticidade do sistema literário, que, sob um mesmo teor, pode ser compreendido tanto num viés nacional quanto num prisma continental.
“Partenogênese sem ovo ontológico”. A função catalisadora da discussão sobre o (neo)barroco nos intercâmbios interamericanos
Authors: Wrobel Jasmin
Published: November 2016

In this article we intend to demonstrate in how far the discussion about Latin American baroque and neo-baroque “catalysed” the approximations and cultural dialogues between Brazil and Hispanic America in the 20th century. The central axis of our analysis is the Brazilian poet, translator and critic Haroldo de Campos, who regretted the lack of approaches on several occasions and who tried to establish cultural bridges between both sides. After giving a short overview about his relationship to the Hispanic Literatures and his thoughts about a non-hierarchical conception of literature, we are going to focus on his theoretical considerations about the baroque as starting point to rethink Latin American Literature. Moreover, we intend to show some of the implicit and explicit literary dialogues between Brazil and Hispanic America which arised both from the historical and the neo-baroque.
La tierra como ética y estética continental: Güiraldes, Rivera, Gallegos y Andrade
Authors: Ortiz-Diaz Jesus Ernesto
Published: November 2016

En este ensayo estudio la descripción de la naturaleza como una reflexión sobre la nacionalidad en un momento histórico donde Latinoamérica transitaba hacia regímenes caracterizados por una agenda política profundamente nacionalista. Entre los textos que analizco están Doña Bárbara, La vorágine, Raucho y Macunaíma.
O Borges desta América, e outras personas literárias
Authors: Grotto Livia
Published: November 2016

Este ensaio se serve da dissolução do lugar enunciativo do autor implícito eleita por Borges no poema de 1975 "La rosa profunda" e no conto de 1970, "Historia de Rosendo Juárez", para contrastá-la com o jovem Borges de Historia universal de la infamia, capaz de comparar-se, entre outros, com John Donne e Baltasar Gracián. Neste sentido, a noção de barroco empregada pelo autor ao longo do tempo denuncia sua vontade de ser lido num âmbito simultaneamente argentino e universal desde o seu primeiro de livro de ficções. Percorrem-se os prólogos de 1935 e de 1954 da Historia universal de la infamia para abordar, a partir desses limiares textuais, a construção da voz do narrador ao longo do livro, observando, igualmente, as suas implicações sobre a imagem do autor implícito. Em linhas gerais, o narrador, absolutamente instável, assume máscaras diferentes, seja no conto que ocupa graficamente a posição central do volume, "Hombre de la esquina rosada", ou no interior dos contos da seção que empresta seu título ao conjunto. Mesmo assim, em 1935, pode-se dizer que o Borges ficcional absorve o caminho da autoconfiança e da fama através da estetização da infâmia. Os senões, ironias e ambiguidades destilados nos prólogos prefiguram um percurso da máscara autoral que deixa o papel de principiante para domesticar o olhar de um "guapo".
RAMA, Àngel. A cidade das letras
Authors: Rodrigues Joana
Published: November 2016

Resenha de "A cidade das letras" de Àngel Rama.
Unprecedented Move
Authors: Pulla Venkat
Published: November 2016

In this issue,Â Dr. Venkat Pulla,Â Coordinator, Social Work Discipline & Senior Lecturer, Australian Catholic University, Australia (Brisbane Campus), writes the editorial onÂ denominations by Modi GovernmentÂ to deal the pervasive corruption in India.
Peripartum Isolated Cortical Venous Thrombosis
Authors: Singh‐Kandola Kiran , Tailor Neeta , Phillips Jessica , Collis Rachel
Published: November 2016

We present a rare, and often mis‐diagnosed, case of an isolated cortical venous thrombosis. The consequences of this are potentially severe, and its non‐specific presentation requires a high degree of suspicion.

A 26‐year‐old female had had an uncomplicated lower segment caesarean section at term. A combined spinal epidural anaesthetic technique was used and there were no immediate postpartum issues. The patient was readmitted ten days later with a three day history of severe headache and photophobia. CT scan of the brain was normal. On day two she suffered a seizure with residual right sided weakness. MRI scan demonstrated sub‐acute haemorrhage into the subdural space of the left posterior portion of the frontal lobe. A cerebral angiogram revealed delayed filling of the cortical veins of the left parietal lobe. Following treatment there were no neurological sequelae.
Milling cutter condition reliability prediction based on state space model
Authors: Li Hongkun , Zhou Shuai , Kan Honglong , Cong Ming
Published: November 2016

Reliability analysis based on equipment's performance degradation characteristics is one of important research areas for reliability engineering. Many researcher work on multi-sample analysis, but it is limited for single equipment or small sample reliability prediction. Therefore, the method of reliability prediction based on state space model (SSM) is investigated in this research for small sample analysis. Firstly, signals about machine working conditions are collected based on-line monitoring technology. Secondly, wavelet packet energy parameters are determined based on the monitored signals. Frequency band energy is regarded as characteristic parameter. Then, the degradation characteristics of signal to noise ratio is improved by moving average filtering processing. In the end, SSM is established to predict degradation characteristics of probability density distribution, and the degree of reliability is determined. Milling cutter is used to demonstrate the rationality and effectiveness of this method. It can be concluded that this method is effective for milling cutter reliability estimation based on the data analysis. It also contributes to machine condition remaining useful life prediction.
Noise subspaces subtraction in SVD based on the difference of variance values
Authors: Zhang Xiaoming , Tang Jian , Zhang Meijun , Ji Qunce
Published: November 2016

As a matrix decomposition method, Singular Value Decomposition (SVD) is introduced to signal processing such as denoising. Firstly, a polluted signal is constructed in Hankel matrix form, and then through SVD the Hankel matrix is decomposed to two unitary matrices and a diagonal matrix in which a series of singular values are arranged in a descending order. These singular values are considered to be located in a series of subspaces including signal subspaces and noise subspaces. The singular values in these subspaces are different because the signal magnitudes dominate noise magnitudes. Therefore, if these two kinds of subspaces are well separated, an ideal denoised signal could be achieved by reconstruction. This paper improves the traditional SVD denoising which merely does well in processing periodic signals’ subspaces separation. The improved SVD denoising method based on variance value extends SVD denoising to aperiodic signal denoising. The denoising results by improved SVD denoising, traditional SVD denoising, wavelet thresholding and EEMD denoising are compared and the improved SVD denoising method received an excellent numerical experimental effects.
Vibrations of rigid rotor systems with misalignment on squirrel cage supports
Authors: Han Qingkai , Chen Yugang , Zhang Hao , Jiang Lingli , Li Xuejun
Published: November 2016

Based on the structural features of a rigid rotor on squirrel cages elastic supports, a finite element (FE) model of the system including squirrel cages is adopted to study its vibration and stress characteristics under the case of bearing misalignment. Firstly, the equations of motion are derived through Lagrange method to obtain the basic dynamic characteristics. Then a three dimensional FE model is established and validated after model updating on basis of the calculated and measured modes and imbalance response. Finally, the influences of bearing misalignment on the rigid rotor system on elastic supports are studied. Results reveal that, for the rigid rotor on elastic squirrel cages supports, bearing misalignment has no obvious influence on the transverse vibration of shaft. However, the stress level on squirrel cage increases significantly, which means the easier damage of bearing and squirrel cage when the bearing misalignment appears.
Nonlinear responses analysis caused by slant crack in a rotor-bearing system
Authors: Chen Xuelian
Published: November 2016

A finite element model of a slant cracked rotor system attached with two disks is presented. A slant crack model is adopted to simulate time-varying stiffness caused by shaft crack. Two types of bearing force (linear and nonlinear bearing forces) are used for simulating the bearing. This study focuses on the effects of eccentric phase differences of two disks on the nonlinear responses of the rotor-bearing system under steady-state process (constant rotating speed) and run-up process. The results show that for the lateral vibration, the superharmonic resonance phenomenon related to the first bending critical speed can be observed under linear bearing forces; however, it is almost unseeable under nonlinear bearing forces. For the torsional vibration, the superharmonic resonance phenomena related to the first torsional natural frequency appear under linear and nonlinear bearing forces. Large eccentric phase differences of two disks can decrease the rotor vibration and restrain the oil-film instability, and the angular acceleration can restrain the oil-film instability due to the tangential inertia force. Moreover, the large torsional amplitude of the second harmonic frequency can also be identified as a typical feature during run-up.
Nonlinear dynamic analysis of a coupled lateral-torsional spur gear with eccentricity
Authors: Ren Zhaohui , Li Jialin , Wang Kai , Zhou Shihua
Published: November 2016

In this study, the dynamic behaviors of gear system are systematically analyzed with coupled lateral-torsional vibration caused by the gear meshing. A 4-degree-of-freedom (DOF) lumped parameter dynamic model for a spur gear, considering gravity, backlash, eccentricity, transmission errors, external excitation, is proposed. Parametric studies are performed to understand the influence of key parameters such as rotational speed ω, backlash b and error fluctuation er on the nonlinear dynamic behavior. The frequency response characteristics of spur gear system show that lateral resonance frequency and torsional resonance frequency simultaneously exhibit in lateral direction. In addition, other nonlinear phenomena including various forms of periodic, quasi-periodic and chaotic vibrations are analyzed. The results show that the nonlinear dynamical behaviors such jump discontinuous phenomena, single-sided impact and double-sided impact are strongly attributed to interaction between backlash, eccentricity and error fluctuant amplitude. Significantly, the appropriate rotational speed and decrease error fluctuant amplitude could effectively control the nonlinear vibration. Whereas the backlash has a complicated effect on the nonlinear dynamical characteristics. The results presented in this paper show that an analysis of the coupled lateral-torsional vibration (CLTV) of the spur transmission gear system. Some research results presented in this paper are useful to dynamic design and vibration control of spur gear transmission system.
Free vibration analysis of tapered columns under self-weight using pseudospectral method
Authors: Sudheer Gopinathan , Sri Harikrishna Pillutla , Vasudeva Rao Yerikalapudy
Published: November 2016

This paper deals with the vibration of tapered column which is affected by gravity using a pseudospectral formulation. The formulation is simple and easy-to-implement and is capable of dealing with different end conditions. Numerical examples of the effects of taper, cross section shapes and gravity on the vibration of columns are illustrated. The effectiveness of the pseudospectral method for vibration analysis of tapered heavy columns is validated by comparing the results with numerical techniques such as the numerical initial value method and differential quadrature method.
Multi-fault diagnosis for rolling element bearings based on intrinsic mode function screening and optimized least squares support vector machine
Authors: Tong Qingbin , Han Baozhu , Lin Yuyi , Zhang Weidong
Published: November 2016

Multi-fault diagnosis of rolling element bearing is significant to avoid serious accidents and huge economic losses effectively. However, due to the vibration signal with the character of nonstationarity and nonlinearity, the detection, extraction and classification of the fault feature turn into a challenging task. This paper presents a novel method based on redundant second generation wavelet packet transform (RSGWPT), ensemble empirical mode decomposition (EEMD) and optimized least squares support vector machine (LSSVM) for fault diagnosis of rolling element bearings. Firstly, this method implements an analysis combining RSGWPT-EEMD to extract the crucial characteristics from the measured signal to identify the running state of rolling element bearings, the vibration signal is adaptively decomposed into a number of modified intrinsic mode functions (modified IMFs) by two step screening processes based on the energy ratio; secondly, the matrix is formed by different level modified IMFs and singular value decomposition (SVD) is used to decompose the matrix to obtain singular value as eigenvector; finally, singular values are input to LSSVM optimized by particle swarm optimization (PSO) in the feature space to specify the fault type. The effectiveness of the proposed multi-fault diagnosis technique is demonstrated by applying it to both simulated signals and practical bearing vibration signals under different conditions. The results show that the proposed method is effective for the condition monitoring and fault diagnosis of rolling element bearings.
Dynamic distribution of contact stress of friction lining in the process of friction transmission
Authors: Guo Yongbo , Zhang Dekun , Wang Dagang , Liu Yuan , Feng Cunao
Published: November 2016

The dynamic distribution of contact stress of friction lining in the process of deep coal mine friction transmission was investigated in this study. Rope tensions during lifting and lowering were obtained using Simulink simulation models first. Then, correlation model of contact stress of friction lining was established. Subsequently, effects of the friction coefficient, lifting load, terminal mass ratio, maximum speed, maximum acceleration and acceleration rate on the dynamic distribution of contact stress were explored. The results show that the wrap angle of the friction pulley is divided into three, i.e. static, mixed, and friction angles, respectively. Furthermore, the friction angle decreases with the increasing coefficient of friction, and the increases of the terminal mass ratio induce expanding trends of overall ranges of the friction angle, which could result in rope skid accidents and unpredictable failure of friction lining.
Stability and slow-fast oscillation in fractional-order Belousov-Zhabotinsky reaction with two time scales
Authors: Hou Jingyu , Li Xianghong , Chen Jufeng
Published: November 2016

The fractional-order Belousov-Zhabotinsky (BZ) reaction with different time scales is investigated in this paper. Based on the stability theory of fractional-order differential equation, the critical condition of Hopf bifurcation with two parameters in fractional-order BZ reaction is discussed. By comparison of the fractional-order and integer-order systems, it is found that they will behave in different stabilities under some parameter intervals, and the parameter intervals may become larger with the variation of fractional order. Furthermore, slow-fast effect is firstly studied in fractional-order BZ reaction with two time scales coupled, and the Fold/Fold type slow-fast oscillation with jumping behavior is found, whose generation mechanism is explained by using the slow-fast dynamical analysis method. The influences of different fractional orders on the slow-fast oscillation behavior as well as the internal mechanism are both analyzed.
Dynamics study and diagnostics with vibration analysis from worm gear manufactured by reverse engineering techniques
Authors: Benabid Yacine , Mansouri Said
Published: November 2016

The study of the wheels and worm systems has been the subject of several studies. An important parameter that is not mentioned is the method and the means of manufacture of the wheels and worm to answer a problem of maintaining machinery. We use reverse engineering techniques in order to create a CAD model of non-standard worm and wheel. The paper is concerned with the dynamic study of worm and wheels. Based dynamic model a test stand is developed in order to achieve diagnostics with vibration analysis. We present our results in this article regarding the acquisition and processing of vibratory signals from accelerometers placed on a test stand for worm and wheels. We use signal treatment techniques in order to extract statistical indicators that indicate the quality of the gears.