Estátuas verbais Moreira, Diego
Revista criação & crítica,
12/2019, Letnik:
1, Številka:
25
Journal Article
Odprti dostop
O presente artigo tem por objetivo analisar alguns poemas do parnasianismo brasileiro, comumente massacrado pela crítica literária, como sendo uma espécie de arte destituída de paixão, cerebral e que ...não fazia mais que emular motivos e regras do parnaso europeu. O objetivo aqui é estabelecer ligações entre os poemas parnasianos e a escultura, uma vez que para Olavo Bilac, Raimundo Correia e Alberto Oliveira, o ápice da criação parnasiana ultrapassaria a ourivesaria verbal, a fim de transformar o próprio poema (predominantemente a forma soneto) em objeto de contemplação estética. Nesse sentido, para além da querela entre parnasianos e simbolistas e o fato de que este surge, no Brasil, como espécie de reação àquele (o que não é novidade, posto que o próprio parnasianismo se configurasse como resposta ao romantismo tardio), perceber as inflexões, mesmo dentro do parnasianismo, a partir de figuras como Francisca Júlia e Luiz Delfino, resulta fulcral para lançar nova luz às leituras feitas, desde o começo do século XX, sobre o parnaso brasileiro.
In this paper, we prove up to the boundary gradient estimates for viscosity solutions to inhomogeneous nonlinear Free Boundary Problems (FBP) governed by fully nonlinear and quasilinear elliptic ...equations with unbounded measurable ingredients. Here, we build upon our previous results in
9
to construct Inhomogeneous Pucci Barriers (IPB) for the Pucci extremal equations with unbounded coefficients. Using these barriers, we obtain a version of a boundary growth type lemma for inhomogeneous nonlinear equations that may be of independent interest. In a certain way, this lemma detects the expansion of the level sets of supersolutions from the boundary to the interior. The use of this boundary growth type lemma together with the geometry of IPB bridge the interchanging information between the free boundary condition and Dirichlet boundary data on the free and fixed boundary respectively. This produces an estimate on the trace of solutions to FBP along the fixed boundary. This way, control of such solutions (up to the boundary) by the distance to the negative phase is obtained. Finally, this distance control combined with the PDE boundary gradient estimates render our final result.
In this paper, we provide an inhomogeneous version of the Carleson estimate for quasilinear elliptic equations with g-Laplace type growth and unbounded right-hand side. We use this result to extend ...exponential growth theorems in cylindrical unbounded domains proven by Berestycki et al. (Duke Math J 81:467–494, 1996). We finish this paper showing a boundary Harnack-type inequality.
A compreensão geográfica que elaboramos da realidade considera que cada momento histórico dos processos de usos do território tem a marca de suas técnicas. O fenômeno técnico é apresentado frente às ...diferentes transformações vivenciadas em todos os lugares. Damos ênfase à compreensão do fenômeno técnico expresso nas dinâmicas funcionais do mundo do presente. Para a compreensão dos processos, identificamos o território usado como categoria analítica e encaramos a realidade como uma totalidade em movimento. Refletimos ainda sobre a difusão das ações e dos objetos técnicos, a qual não se dá de maneira uniforme ou homogênea, na constituição do meio técnico-científico-informacional.
The use of helical piles has grown over the years owing to different advantages, such as large uplift capacity due to the anchor effect of the helix and installation torque-capacity correlation. ...Although the use of helical foundations is expanding worldwide, some key aspects fundamental to the design are not well understood to date. Practical experience indicates that the installation forces and loading performance of helical piles in sand are dependent on the helices characteristics and confining stresses. Therefore, for a better understanding of these dependencies, the effects of the helix-to-shaft diameter ratio (wing ratio) and vertical confining stress on the installation torque and forces, and on the uplift and compression capacities of helical piles, were evaluated from nine calibration chamber tests, conducted on instrumented single-helix piles in very dense sand. Among other findings, this study indicated that for a certain shaft diameter (i) the wing ratio influences the installation torque, but does not affect the installation vertical force; (ii) the ultimate uplift pressure mobilized on the helix decreases with the increase of the wing ratio; (iii) the growth rate of the helix bearing resistance with the confining pressure, for vertical stresses higher than 100 kPa, becomes reduced for piles with a larger wing ratio.
The impact of the diverse processes responsible for the distribution of suspended sediments in the wide, shallow, and microtidal Río de la Plata estuary and the adjacent shelf is studied by means of ...a set of process‐oriented numerical simulations. Model results show that the large width and the geometry of the estuary play a major role in the sedimentation processes. The widening and deepening of the estuary drives a significant reduction in current speeds at (i) the confluence of the tributaries and (ii) downstream Barra del Indio Shoal. Thus, sediment deposition enhances downstream those areas. Even though tides are of small amplitude in the study area, they have a significant impact on lateral mixing and resuspension of the bottom sediments. Resuspension augments the concentration of fine sediments in the layers close to the bottom, but tidal energy is not enough to lift them to the surface. Winds (which can be quite strong over this area) enhance horizontal mixing, smoothing the pattern produced by tides. Wind waves increase the concentration of sediment by vertical mixing, and their effect is most evident along the southern coast where wind waves lift the sediments resuspended by tides to the surface. The estuarine circulations associated to the bottom salinity front acts retaining sediments upstream the Barra del Indio Shoal, where estuarine currents and flocculation play an important role in sediment deposition.
Key Points
The large width and the geometry of the estuary play a major role in the sedimentation process
Tides, even with small amplitude, have significant impact on lateral mixing and resuspension of bottom sediments
Winds enhance horizontal mixing, and wind waves increase the concentration of sediment by vertical mixing
Key points
The mechanisms involved in hypothermia and fever during systemic inflammation (SI) remain largely unknown.
Our data support the contention that brain‐mediated mechanisms are different in ...hypertension during SI.
Considering that, clinically, it is not easy to assess all mechanisms involved in cardiovascular and thermoregulatory control during SI, the present study sheds light on these integrated mechanisms that may be triggered simultaneously in septic hypertensive patients.
The result obtained demonstrate that, in lipopolysaccharide‐induced SI, an increased hypothermia is observed in neurogenic hypertension, which is caused by reduced hypothalamic prostaglandin E2 production and increased heat loss in conscious rats.
Therefore, the results of the present study provide useful insight for clinical trials evaluating the thermoregulatory outcomes of septic patients with hypertension.
Hypertension is a prevalent disease characterized by autonomic‐induced elevated and sustained blood pressure levels and abnormal body core temperature (Tb) regulation. The present study aimed to determine the brain‐mediated mechanisms involved in the thermoregulatory changes observed during lipopolysaccharide (LPS)‐induced systemic inflammation (SI; at a septic‐like model) in spontaneously hypertensive rats (SHR). We combined Tb and skin temperature (Tsk) analysis, assessment of prostaglandin (PG) E2 levels (the proximal mediator of fever) in the anteroventral region of the hypothalamus (AVPO; an important site for Tb control), oxygen consumption analysis, cardiovascular recordings, assays of inflammatory markers, and evaluation of oxidative stress in the plasma and brain of male Wistar rats and SHR that had received LPS (1.5 mg kg−1) or saline. LPS induced hypothermia followed by fever in Wistar rats, whereas, in SHR, a maintained hypothermia without fever were observed. These thermoregulatory responses were associated with an increased heat loss in SHR compared to Wistar rats. We measured LPS‐induced increased PGE2 levels in the AVPO in Wistar rats, but not in SHR. The LPS‐induced drop in blood pressure was higher in SHR than in Wistar rats. Furthermore, LPS‐induced plasma and brain regions involved in autonomic control: nucleus tractus solitarius (NTS) and rostral ventrolateral medulla (RVLM) cytokine surges were blunted, whereas oxidative stress was higher in SHR. LPS‐induced SI leads to blunted cytokine surges both systemically (plasma) and centrally (NTS and RVLM) and reduced hypothalamic PGE2 production, which are all associated with increased hypothermia mediated by increased heat loss, but not by heat production, in SHR.
Key points
The mechanisms involved in hypothermia and fever during systemic inflammation (SI) remain largely unknown.
Our data support the contention that brain‐mediated mechanisms are different in hypertension during SI.
Considering that, clinically, it is not easy to assess all mechanisms involved in cardiovascular and thermoregulatory control during SI, the present study sheds light on these integrated mechanisms that may be triggered simultaneously in septic hypertensive patients.
The result obtained demonstrate that, in lipopolysaccharide‐induced SI, an increased hypothermia is observed in neurogenic hypertension, which is caused by reduced hypothalamic prostaglandin E2 production and increased heat loss in conscious rats.
Therefore, the results of the present study provide useful insight for clinical trials evaluating the thermoregulatory outcomes of septic patients with hypertension.
The mechanisms involved in hypothermia and fever during systemic inflammation (SI) remain largely unknown. Our data support the contention that brain-mediated mechanisms are different in hypertension ...during SI. Considering that, clinically, it is not easy to assess all mechanisms involved in cardiovascular and thermoregulatory control during SI, the present study sheds light on these integrated mechanisms that may be triggered simultaneously in septic hypertensive patients. The result obtained demonstrate that, in lipopolysaccharide-induced SI, an increased hypothermia is observed in neurogenic hypertension, which is caused by reduced hypothalamic prostaglandin E
production and increased heat loss in conscious rats. Therefore, the results of the present study provide useful insight for clinical trials evaluating the thermoregulatory outcomes of septic patients with hypertension.
Hypertension is a prevalent disease characterized by autonomic-induced elevated and sustained blood pressure levels and abnormal body core temperature (Tb) regulation. The present study aimed to determine the brain-mediated mechanisms involved in the thermoregulatory changes observed during lipopolysaccharide (LPS)-induced systemic inflammation (SI; at a septic-like model) in spontaneously hypertensive rats (SHR). We combined Tb and skin temperature (Tsk) analysis, assessment of prostaglandin (PG) E
levels (the proximal mediator of fever) in the anteroventral region of the hypothalamus (AVPO; an important site for Tb control), oxygen consumption analysis, cardiovascular recordings, assays of inflammatory markers, and evaluation of oxidative stress in the plasma and brain of male Wistar rats and SHR that had received LPS (1.5 mg kg
) or saline. LPS induced hypothermia followed by fever in Wistar rats, whereas, in SHR, a maintained hypothermia without fever were observed. These thermoregulatory responses were associated with an increased heat loss in SHR compared to Wistar rats. We measured LPS-induced increased PGE
levels in the AVPO in Wistar rats, but not in SHR. The LPS-induced drop in blood pressure was higher in SHR than in Wistar rats. Furthermore, LPS-induced plasma and brain regions involved in autonomic control: nucleus tractus solitarius (NTS) and rostral ventrolateral medulla (RVLM) cytokine surges were blunted, whereas oxidative stress was higher in SHR. LPS-induced SI leads to blunted cytokine surges both systemically (plasma) and centrally (NTS and RVLM) and reduced hypothalamic PGE
production, which are all associated with increased hypothermia mediated by increased heat loss, but not by heat production, in SHR.
Information about the sources, sinks, dynamics, and how environmental variables affect the transport of microplastics (MPs) from continental deposits to marine systems is still limited. Most of the ...knowledge about the distribution of plastic in the oceans comes from the use of numerical models to understand the routes of MPs moving in aquatic systems. The Río de la Plata (RdP) is an estuary located on the eastern coast of South America and is one of the most anthropized watercourses in the region. In this study, the trajectory of MPs in the RdP was examined through the implementation, for the first time for the region, of numerical simulation models. The impact of the estuary’s hydrodynamic characteristics, winds, and MP morphological properties on their trajectory was investigated. The simulations produced demonstrated a high correlation between the hydrodynamics of the Río de la Plata and the trajectory of positively buoyant MPs. The wind was identified as a significant driving force in the simulation of MP motion dynamics. Modifications in the size of the MPs have more influence on the trajectory than their morphology. The results constitute an initial step toward understanding the dynamics of these emerging pollutants in one of South America’s most important basins.
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