15,584 research outputs found
Lima Barreto / Roberto Arlt: a comunidade em exílio
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Literatura, Florianópolis, 2009.A presente tese opera no limiar entre a literatura brasileira e a argentina, mais especificamente com dois de seus escritores bastante admirados, mas não raro censurados pela crítica em função de supostos deslizes de linguagem e estilo. Lima Barreto (1981-1922) e Roberto Arlt (1900-1942), estes "homens do subsolo" no espaço da literatura nacional, são foco deste estudo que procura, através da leitura dos romances - Recordações do Escrivão Isaías Caminha, Triste Fim de Policarpo Quaresma, Vida e Morte de M. J. Gonzaga de Sá, de Lima Barreto, e El juguete rabioso, Los siete locos e Los lanzallamas,de Roberto Arlt -, acompanhar o exílio e a relação das personagens com a comunidade. A partir da definição do conceito de exílio como negatividade, tal como estabelecem Maurice Blanchot, Jean-Luc Nancy, Giorgio Agamben, Franco Rella, entre outros, é possível detectar que a série de personagens solitárias e torturadas, presentes nos romances, participam de um verdadeiro projeto de exaustão do sentido da comunidade que se funda no território. Tal projeto, que exauri a comunidade territorial imaginada - seja nacional ou revolucionária - é, com efeito, fundamento de outra experiência de comunidade. Esta última não faz obra, não opera limite, mas se dá como exílio, como abertura, como acolhimento do ser inqualificável, tal como debatem os filósofos já citados. Por fim, foram tomadas as últimas experiências de escrita - de Lima Barreto, O cemitério dos vivos, e de Roberto Arlt, El desierto entra en la ciudad - que têm como tema a loucura. A partir delas é possível compreender que mesmo o "fora", ao ser entendido como louco, acaba retido nos limites de um confinamento territorial, figurando um modo do próprio Estado se imunizar, conforme Roberto Esposito, contra o "perigo" da comunidade como inclinação ao outro. Porém, a voz narrativa, esvaziada do "eu", parece ainda elaborar uma linha de fuga do território, nos fazendo vislumbrar, enfim, a comunidade em exílio
Logarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
Some formulas for the Appell function F 1 (a, b, b′; c; w, z)
No full textSome new relations for the Appell function F 1 (a, b, b′; c; w, z) are obtained including differentiation and integration formulas, integral representations, series and recurrence relations. Some integrals are given which can be expressed in terms of F 1 and confluent Appell functions (Humbert functions) Φ1, Φ2, Φ
Cálculos numéricos de la Hopf zero
No full textConsideramos la siguiente familia de campos X en R3 :
dx
dt = − xz − y( + c z) + p+1f( x, y, z, )
dy
dt = − yz + x( + c z) + p+1g( x, y, z, )
dz
dt = (−1 + b(x2 + y2) + z2) + p+1h( x, y, z, )
(1)
donde f, g y h son funciones reales anal´ıticas, de orden mayor o igual que 3; , b y
c son constantes y > 0 es un par´ametro peque˜no. Cuando = 0, X0 es la singularidad
llamada Hopf-Zero. De hecho considerando ˜Xμ un desplegamiento universal
anal´ıtico de esta singularidad, y realizando su forma normal hasta t´erminos de orden
2 obtenemos, despu´es de un escalado de las variables de orden = √μ, la familia
(1) considerada (ver [BV84]) con p = −2. Cuando f = g = h = 0 observamos que
el sistema tiene una ´orbita heterocl´ınica entre los puntos cr´ıticos (0, 0,±1) la cual
est´a dada por: {(0, 0, z) : −1 < z < 1}. El objetivo de este trabajo es ver que esta
´orbita heterocl´ınica se rompe si (f, g, h) 6= 0 y calcular la distancia entre las variedades
invariantes unidimensionales correspondientes. Para el caso en que p > −2 (ver
[BV84]) esta distancia sobre el plano z = 0 esta dada por:
ds,u = 2 ec /2| ˆm(i )| pe− | |/(2 )(1 + O( p+2| log( )|)), (2)
donde ˆm es la transformada de Borel de la funci´on m(u) = u1+ic(f + ig)(0, 0, u, 0).
Nuestro estudio trata de establecer el valor de la distancia para el caso p = −2. Para
este caso hemos desarrollado algoritmos que utilizan c´alculos con multiprecisi´on
debido a que, cuando el par´ametro es peque˜no, ambas variedades se aproximan exponencialmente.
Nuestro objetivo fundamental es verificar la f´ormula (2) para p > 2 y
obtener una f´ormula v´alida para p = −2.Postprint (published version
Cálculos numéricos de la Hopf zero
No full textConsideramos la siguiente familia de campos X en R3 :
dx
dt = − xz − y( + c z) + p+1f( x, y, z, )
dy
dt = − yz + x( + c z) + p+1g( x, y, z, )
dz
dt = (−1 + b(x2 + y2) + z2) + p+1h( x, y, z, )
(1)
donde f, g y h son funciones reales anal´ıticas, de orden mayor o igual que 3; , b y
c son constantes y > 0 es un par´ametro peque˜no. Cuando = 0, X0 es la singularidad
llamada Hopf-Zero. De hecho considerando ˜Xμ un desplegamiento universal
anal´ıtico de esta singularidad, y realizando su forma normal hasta t´erminos de orden
2 obtenemos, despu´es de un escalado de las variables de orden = √μ, la familia
(1) considerada (ver [BV84]) con p = −2. Cuando f = g = h = 0 observamos que
el sistema tiene una ´orbita heterocl´ınica entre los puntos cr´ıticos (0, 0,±1) la cual
est´a dada por: {(0, 0, z) : −1 < z < 1}. El objetivo de este trabajo es ver que esta
´orbita heterocl´ınica se rompe si (f, g, h) 6= 0 y calcular la distancia entre las variedades
invariantes unidimensionales correspondientes. Para el caso en que p > −2 (ver
[BV84]) esta distancia sobre el plano z = 0 esta dada por:
ds,u = 2 ec /2| ˆm(i )| pe− | |/(2 )(1 + O( p+2| log( )|)), (2)
donde ˆm es la transformada de Borel de la funci´on m(u) = u1+ic(f + ig)(0, 0, u, 0).
Nuestro estudio trata de establecer el valor de la distancia para el caso p = −2. Para
este caso hemos desarrollado algoritmos que utilizan c´alculos con multiprecisi´on
debido a que, cuando el par´ametro es peque˜no, ambas variedades se aproximan exponencialmente.
Nuestro objetivo fundamental es verificar la f´ormula (2) para p > 2 y
obtener una f´ormula v´alida para p = −2.Postprint (published version
Lyman break galaxies and the star formation rate of the Universe at z ~ 6
No full textWe determine the space density of UV-luminous starburst galaxies at z≈ 6 using deep HST ACS SDSS-i′ (F775W) and SDSS-z′ (F850LP) and VLT ISAAC J and Ks band imaging of the Chandra Deep Field South. We find eight galaxies and one star with (i′−z′) > 1.5 to a depth of z′AB= 25.6 (an 8σ detection in each of the 3 available ACS epochs). This corresponds to an unobscured star formation rate of ≈15 h−270 M⊙ yr−1 at z= 5.9, equivalent to L* for the Lyman-break population at z= 3–4 (ΩΛ= 0.7, ΩM= 0.3). We are sensitive to star-forming galaxies at 5.6 ≲z≲ 7.0 with an effective comoving volume of ≈1.8 × 105h−370 Mpc3 after accounting for incompleteness at the higher redshifts due to luminosity bias. This volume should encompass the primeval subgalactic-scale fragments of the progenitors of about a thousand L* galaxies at the current epoch. We determine a volume-averaged global star formation rate of (6.7 ± 2.7) × 10−4h70 M⊙ yr−1 Mpc−3 at z∼ 6 from rest-frame UV selected starbursts at the bright end of the luminosity function: this is a lower limit because of dust obscuration and galaxies below our sensitivity limit. This measurement shows that at z∼ 6 the star formation density at the bright end is a factor of ∼6 times less than that determined by Steidel et al. for a comparable sample of UV-selected galaxies at z= 3–4, and so extends our knowledge of the star formation history of the Universe to earlier times than previous work and into the epoch where reionization may have occurred
Monitoring diesel fuels with supervised distance preserving projections and local linear regression
No full textIn this work, we discuss a recently proposed approach for supervised dimensionality reduction, the Supervised Distance Preserving Projection (SDPP) and, we investigate its applicability to monitoring material's properties from spectroscopic observations using Local Linear Regression (LLR). An experimental evaluation is conducted to show the performance of the SDPP and LLR and compare it with a number of state-of-the-Art approaches for unsupervised and supervised dimensionality reduction. For the task, the results obtained on a benchmark problem consisting of a set of NIR spectra of diesel fuels and six different chemico-physical properties of those fuels are discussed. Based on the experimental results, the SDPP leads to accurate and parsimonious projections that can be effectively used in the design of estimation models based on local linear regression
Author Response
No full textRahmatinejad Z, Hoseini B, Pourmand A, Reihani H, Rahmatinejad F, Eslami S, Author Response. Indian J Crit Care Med 2024;28(2):183-184
Identity of a historic garden: The view of the international literature and committies on the role of the botanical elements
No full textElsevier
Urban Forestry & Urban Greening
Volume 101
, November 2024, 128501
Urban Forestry & Urban Greening
Identity of a historic garden: The view of the international literature and committies on the role of the botanical elements
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Z. Hosseini a
,
F. Bartoli a b
,
M.A. Pontrandolfi a
,
G. Caneva a
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https://doi.org/10.1016/j.ufug.2024.128501
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Abstract
Historic gardens are conceptualized within various cultural and legal frameworks. This research aims to unravel the complexities of the historic garden identity through the lens of international regulations, national laws, and scientific literature to reveal differences in the perception of their botanical elements. We employed a combined analytical approach, using recommendations from related international institutions (i.e. UNESCO, ICCROM, and ICOMOS), national legislation, and a review of scientific literature. The analysis identified 25 documents related to the keywords: nature, landscape, site, and garden; however, only six mentioned gardens, and just one (The Florence Charter., 1982) explicitly addressed historic gardens. Only 7 % of UNESCO member countries (197) have specific provisions for historic gardens. Within them, a diverse range of definitions and standards has resulted in discrepancies in how historic gardens are recognized and conserved across different jurisdictions. Some countries have well-defined categories for garden heritage, while others offer limited or broad categorizations that may obscure garden identities. The findings underscore the necessity for more coherent international regulations that adequately reflect historic gardens' cultural and botanical significance. The study also highlighted the overlooked role of botanical elements, since only four countries included botanical value as an explicit criterion in their legal designations, suggesting that the botanical aspect is often considered within a larger ecological and geographical context. The imperative to preserve these living legacies within the broader context of cultural heritage also became apparent
Writing of(f) family : Sarah’s family hand-me-downs
No full textThis chapter explores family estrangement through the lens of the trauma of transgenerational abandonment. Applying the notion of family hand-me-downs, the author makes use of speculative (real and imagined) autoethnography (Purnell, 2015), to situate relational stories from five family generations. These speculative, relational stories are impacted by traumatic memories, buried deep as affective, psychic, shame-binds. Embodied shame is transmitted down through the generations, as cultural and family scripts—by family members who have become haunted by shameful secrets and silences. Sometimes these ghostly scripts occur unconsciously, and other times, consciously. Breaking the silence of family secrets is never easy. The author hopes that writing trauma stories (relational and speculative) through imagination, adding just a touch of reality, stories can become the impetus for identification and empathy bringing with it the possibility of repairing broken relationships, disconnected by the impact of transgenerational trauma of abandonment. It is only by healing the wounds of the past, bought on by family estrangement, that new relational stories may unfold ending stories of embodied, toxic shame, so that new relationships can flourish
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