ABSTRACT: The use of nitrogen (N) in pastoral ecosystems leads to increased productivity, as it allows the plant to elongate its leaves and, therefore, grazing herbivores harvest the green leaves. However, there are very volatile N sources, which can be replaced by ammonium nitrate, which is less volatile and less dependent on the application in rainy days. The treatments are compound of Marandu palisade grass pastures managed under continuous stocking at a canopy height of 25 cm, with different levels of N fertilizer: 0, 75, and 150 kg ha-1year-1, as ammonium nitrate (32% of N), with four replicates (pastures) in a completely randomized design. Nitrogen uptake (54.9, 96.5, 113.8 kg N ha-1) and N nutrition index (0.67, 0.98, 1.15) were different between N level, respectively, 0, 75 and 150 kg ha-1 year-1. The N recovery (58.3, 40.9 %) differed between 75 and 150 kg ha-1 year-1, respectively. The dose of 75 kg N kg ha-1 year-1 results in better N utilization, while the dose of 150 kg N ha-1 year-1 enables greater stocking rate; therefore, requiring less grazing area.

RESUMO: O uso de nitrogênio (N) em ecossistemas pastoris leva ao aumento da produtividade, pois permite que a planta alongue suas folhas e, portanto, os herbívoros colham as folhas verdes. Porém, existem fontes de nitrogênio muito voláteis, que devem ser substituídas por nitrato de amônio, que é menos volátil e menos dependente da aplicação em dias chuvosos. Os tratamentos foram compostos por pastagens de capim-marandu, manejadas sob lotação contínua, na altura do dossel a 25 cm, com diferentes doses de N: 0, 75 e 150 kg ha-1 ano-1, na forma de nitrato de amônio (32% de N), com quatro repetições (piquetes), em delineamento inteiramente casualizado. A absorção de nitrogênio (54,9; 96,5; 113,8 kg N ha-1) e o índice nutricional de N (0,67; 0,98; 1,15) foram diferentes entre as doses de N, respectivamente, 0, 75 e 150 kg ha-1 ano-1. A recuperação de N (58,3; 40,9%) diferiu entre 75 e 150 kg ha-1 ano-1, respectivamente. A dose de 75 kg N kg ha-1 ano-1 resultou em melhor aproveitamento do N, enquanto a dose de 150 kg N ha-1 ano-1 possibilita maior taxa de lotação; portanto, exigindo menos área de pastagem.

Abstract The objective of the research is to describe the transhumance that is understood as the seasonal displacement of cattle in a Aymara community in the XXI century. The methodology used follows the qualitative ethnographic approach, using participant observation to accompany a family composed of eight members, with ages ranging from 8 to 80 years, who still practice the tradition of temporarily moving their livestock from the low puna to the high puna. The results obtained reveal that the shepherds move seasonally due to the exhaustion and shortage of grass in their main enclosure, a situation that leads to herd the cattle for a full day, withstanding the intense heat and the dry cold of the Altiplano. In addition, this tour is impregnated with beliefs, customs and meanings that revolve around the elements of nature and wildlife. This implies a dialog with nature, deities and divinities, followed by actions of harmony, balance and symbiosis with the environment and social life. In conclusion, it is determined that the seasonal transhumance of livestock has an experiential, community and intergenerational cycle.

Resumen El objetivo de la investigación es describir la trashumancia que se entiende como el desplazamiento estacional del ganado en una comunidad aimara en el siglo XXI. La metodología empleada sigue el enfoque cualitativo etnográfico, utilizando la observación participante para acompañar a una familia compuesta por ocho miembros, con edades que van desde los 8 hasta los 80 años, quienes aún practican la tradición de desplazar temporalmente su ganado desde la puna baja hacia la puna alta. Los resultados obtenidos revelan que los pastores se desplazan estacionalmente debido al agotamiento y la escasez de pasto en su recinto principal, situación que lleva a arrear el ganado durante un día completo, soportando el intenso calor y el frío seco del Altiplano. Además, este recorrido está impregnado de creencias, costumbres y significados que giran en torno a los elementos de la naturaleza y la vida salvaje. Eso implica un diálogo con la naturaleza, las deidades y las divinidades, seguido de acciones de armonía, equilibrio y simbiosis con el entorno y la vida social. En conclusión, se determina que la trashumancia estacional del ganado tiene un ciclo vivencial, comunitario e intergeneracional.

RESUMO Apesar de terem sido estudos realizados por autores diferentes e de certa forma independente um do outro, as teorias das Implicaturas de Paul Grice e dos Atos de Discurso Indiretos de John Searle não apenas estão intimamente ligadas como, na verdade, são complementares entre si, de modo que se mostra de crucial importância a compreensão dos dois juntos, a fim de se obter um maior domínio da noção de “não literalidade” das enunciações. Este trabalho tratará de mostrar as principais características de ambas as teorias e como elas se inter-relacionam orgânica e simbioticamente. outro verdade si juntos literalidade enunciações interrelacionam inter relacionam simbioticamente

ABSTRACT Although these are studies performed by different authors and in a certain way independent from one another, the theories of Implicatures by Paul Grice and of Indirect Speech Acts by John Searle are not only deep linked but, in fact, are mutually complementary, for we can see the crucial importance of the comprehension of both of them in order to obtain a better grasp on the notion of “Non-literality.” This work will show the main properties of both theories and how they work together in an organic and symbiotic way. another but fact complementary Nonliterality. Nonliterality Non literality. literality “Non-literality. “Non-literality

Resumo O tabagismo é um problema de saúde pública, está associado a uma elevada morbimortalidade. Os serviços de saúde vigentes para a cessação tabágica, apesar de efetivos, apresentam alcance limitado e foram comprometidos pela pandemia. O estudo teve como objetivo analisar o cuidado com a pessoa tabagista em João Pessoa (PB), na pandemia de COVID-19. Foi realizado um estudo descritivo, exploratório e quantitativo com duas fases: levantamento dos indicadores de saúde e avaliação dos perfis sociodemográficos dos profissionais e usuários dos serviços nos anos do estudo. Participaram da pesquisa sete profissionais, coordenadores de grupo de tabagismo e 20 usuários. Os resultados apontaram para uma baixa cobertura do programa, além de revelar queda no número de fumantes atendidos na pandemia, de 419 em 2019 para 129 em 2020. As entrevistas identificaram pontos positivos e limitações do programa, boa efetividade e baixo acesso, especialmente na APS, e que as estratégias utilizadas para conter o consumo do tabaco e seus riscos durante a pandemia partiram dos serviços e dos profissionais envolvidos. É possível concluir que, nessa região, o Programa Nacional de Controle do Tabagismo (PNCT) apresenta implantação incipiente na APS e que, durante a pandemia, o número de serviços ofertados foi reduzido, diminuindo a procura e as ações realizadas.

Abstract Smoking is a public health problem associated with high morbimortality. Smoking cessation services, although effective, have limited reach and have been compromised by the pandemic. This study aimed to analyze the care for smokers in João Pessoa (PB), Brazil, during the COVID-19 pandemic. A descriptive, exploratory, and quantitative study was conducted in two phases: a survey of health indicators and an evaluation of sociodemographic profiles of professionals and service clients during the study years. Seven professionals, smoking group coordinators, and 20 clients participated in the research. The results showed low program coverage, with a declining number of smokers treated during the pandemic, down from 419 in 2019 to 129 in 2020. Interviews identified the program’s positive aspects and limitations, good effectiveness, and low access, especially in primary health care. Tobacco consumption and risk reduction strategies during the COVID-19 pandemic originated from services and professionals involved. We can conclude that the National Tobacco Control Program has an incipient implementation in primary health care in this region and that the number of services offered was reduced during the pandemic, decreasing demand and actions.

Abstract Smoking is a public health problem associated with high morbimortality. Smoking cessation services, although effective, have limited reach and have been compromised by the pandemic. This study aimed to analyze the care for smokers in João Pessoa (PB), Brazil, during the COVID-19 pandemic. A descriptive, exploratory, and quantitative study was conducted in two phases: a survey of health indicators and an evaluation of sociodemographic profiles of professionals and service clients during the study years. Seven professionals, smoking group coordinators, and 20 clients participated in the research. The results showed low program coverage, with a declining number of smokers treated during the pandemic, down from 419 in 2019 to 129 in 2020. Interviews identified the program’s positive aspects and limitations, good effectiveness, and low access, especially in primary health care. Tobacco consumption and risk reduction strategies during the COVID-19 pandemic originated from services and professionals involved. We can conclude that the National Tobacco Control Program has an incipient implementation in primary health care in this region and that the number of services offered was reduced during the pandemic, decreasing demand and actions.

Resumo O tabagismo é um problema de saúde pública, está associado a uma elevada morbimortalidade. Os serviços de saúde vigentes para a cessação tabágica, apesar de efetivos, apresentam alcance limitado e foram comprometidos pela pandemia. O estudo teve como objetivo analisar o cuidado com a pessoa tabagista em João Pessoa (PB), na pandemia de COVID-19. Foi realizado um estudo descritivo, exploratório e quantitativo com duas fases: levantamento dos indicadores de saúde e avaliação dos perfis sociodemográficos dos profissionais e usuários dos serviços nos anos do estudo. Participaram da pesquisa sete profissionais, coordenadores de grupo de tabagismo e 20 usuários. Os resultados apontaram para uma baixa cobertura do programa, além de revelar queda no número de fumantes atendidos na pandemia, de 419 em 2019 para 129 em 2020. As entrevistas identificaram pontos positivos e limitações do programa, boa efetividade e baixo acesso, especialmente na APS, e que as estratégias utilizadas para conter o consumo do tabaco e seus riscos durante a pandemia partiram dos serviços e dos profissionais envolvidos. É possível concluir que, nessa região, o Programa Nacional de Controle do Tabagismo (PNCT) apresenta implantação incipiente na APS e que, durante a pandemia, o número de serviços ofertados foi reduzido, diminuindo a procura e as ações realizadas.

In this study, aluminum alloy 7075 (AA7075) nanopowders were prepared by High-Energy Ball Milling (HEBM) in a bath of isopropyl alcohol. The process was investigated in different milling times and silicon carbides (SiC) reinforcement percentual. The effects of these parameters on the samples were characterized by X-ray diffraction (XRD), Laser Diffraction (LD), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS). The XRD analyses showed that as the grinding time increases, the micro deformation also increases, while the crystallite and particle size decrease until a constant value at 480 min. If the percentual of SiC reinforcement increases until 5 percent, there is a minimum change in the results compared to AA 7075 milling 480 min with no reinforcement. On the other hand, when the AA7075 was milled for 480 min and reinforced by 10 percent SiC, the best structural refinement result was achieved.

The aim of this investigation was to study and evaluate the fracture toughness (KICV) of an AISI M3:2 high speed steel that was prepared by powder metallurgical processing, which consisted of uniaxial cold compaction of irregularly shaped water atomized powders, without and with 0.3% of carbon in the form of graphite, followed by vacuum sintering to obtain compacts with densities close to its theoretical value. The sintered steels were then hardened by austenitizing, quenching and triple tempering. Chevron fracture toughness test samples were prepared from the compacts and the tests conducted to determine KICV. The microstructures of the specimens were examined by scanning electron microscopy (SEM), and the composition of the phases determined by x-ray diffraction analysis (XRD). The sizes of the primary carbides and of the austenite grains were determined using Quantikov digital analysis software. No significant difference in fracture toughness (KICV) between the two high speed steels AISI M3:2, austenitized at the different temperatures, was observed.

ABSTRACT This work aimed to analyze the influence of treatment pressure on the interaction between stearic acid and an Argon-Oxygen plasma. The fixed variables were the applied RF plasma power (50 W), treatment time (30 min), and treatment starting temperature (273 K). The pressure was varied as follows: 0.2, 0.6, and 1.0 Torr. For all treatment conditions, the etching of the samples was observed, as evidenced by the mass loss of the specimens and by following the gaseous by-products of reactions employing a mass spectrometer coupled to the reaction chamber. Optical emission spectroscopy followed the emission lines of oxygen active species. Functionalization of the specimens was also observed, as shown by the results obtained by Fourier-transform infrared spectroscopy (FTIR) and through XRD analysis. A liquid phase was formed for samples treated at 0.6 and 1.0 Torr, which favored the functionalization process and broadened the band present in the region from 1750 to 1700 cm–1, resulting in amorphous phases. An increase in the intensity of the characteristic peaks of esters was also observed. It can be concluded that the higher pressure favors the formation of a liquid phase and reaction kinetics, resulting in higher functionalization and lower etching.

In this work, composite powders of aluminum alloy 7075 (AA7075) reinforced by 2 weight percent of nanosized particles of silicon carbide (SiC), titanium nitride (TiN), and zinc oxide (ZnO) were produced in a bath of isopropyl alcohol by high energy ball milling during 480 min at 25 ºC, 900 rpm, and Balls-to-Powder Weight Ratio (BPR) of 20:1. The techniques of X-Ray Diffraction (XRD), Laser Diffraction Method (LDM), Scanning Electron Microscopy (SEM), and microanalysis of Energy Dispersive Spectroscopy (EDS) were used to characterize the powders as received and processed. Then, the composites were hot extruded and characterized by XRD, SEM, and microhardness Vickers (HV). The milling process reduces the crystallite and particle size to around 30 nm and 10 µm, respectively. After extrusion, a fine microstructure and good consolidation were found for all bars, except for AA7075 as received. The ranging microhardness values were from 97 HV to 121 HV.

ABSTRACT The objective was to examine the effect of two short-term protein-energy supplementation (STPES) strategies at the rearing phase on the performance of Nellore calves grazing on Mombaça or Marandu grasses. The experiment used 72 calves (7-mo old, 229±3.0 kg body weight [BW]) allotted in a completely randomized block design to four treatments in a 2 × 2 factorial arrangement: two forage cultivars (Panicum maximum cv. Mombaça vs. Brachiaria brizantha cv. Marandu) and two STPES (WEAN – STPES immediately after weaning vs. TRAN – STPES in the transition of dry-rainy). The WEAN animals received 1 kg day−1 (n = 36) of a protein-energy supplement, whereas TRAN animals were subjected to STPES at 2 g/kg BW day−1 (n = 36), both for 53 days. Every 28 days, calves were weighed to measure performance, and pastures were sampled to evaluate productive and structural traits. Growth performance was analyzed considering a completely randomized block design with a 2 × 2 arrangement of treatment, whereas forage responses included repeated measures. Marandu had a higher forage mass (3,586 kg) than Mombaça (2,890 kg), but there was no difference in forage mass in each cultivar between preconditioning periods. The nutritional composition of Marandu and Mombaça cultivars did not differ and had similar results of in vitro fermentation variables. Stocking rate was higher for WEAN, in the Mombaça pastures. The STPES at weaning on Marandu provided greater gains per area. When applied in the period following the weaning and coinciding with the dry season, the STPES improves the performance of newly weaned calves kept on Marandu and Mombaça grasses.

Abstract This work investigates the transient response of bar structures interacting with three-dimensional soil profiles. The structures are modeled by the Finite Element Method (FEM) and the soil models are described by a three-dimensional Boundary Element Formulation (BEM) in the frequency domain. A classic modal analysis is performed on the structure in terms of the relative displacements with respect to the soil. The dynamic response of the structure is coupled to the soil response, aiming to obtain frequency response functions (FRFs) of the soil-structure system. A new set of modal parameters are extracted from the FRFs of the coupled system. These new parameters allow for the synthesis of a set of orthogonal differential equations in the time domain. These equations are integrated by a classical numerical scheme resulting in the transient response of the structure interacting with the supporting soil. It is shown that for soil profiles that present eigenfrequencies, the system modal basis must be expanded to properly include the soil dynamics. The cases of a structure interacting with a homogeneous half-space and with a horizontal layer over a rigid stratum are considered. The results presented for both soil models are consistent. threedimensional three dimensional FEM (FEM BEM (BEM domain (FRFs soilstructure eigenfrequencies dynamics halfspace half space considered consistent

Abstract This article presents novel non-singular influence functions for homogeneous media. These solutions are displacement and stress fields of a three-dimensional, isotropic full-space under time-harmonic vertical and horizontal loads, which can be used within the framework of boundary element methods to solve elastodynamics problems in engineering practice. In order to account for sharply-varying contact tractions that may occur in such problems, the solutions in this article consider a biquadratic distribution of the loads within the loaded surface. In the present derivation, sets of Fourier transforms are used to uncouple the medium's equation of motion and enable the incorporation of boundary conditions directly as traction discontinuities. The article brings selected numerical results for various geometric and constitutive parameters. nonsingular non singular media threedimensional, threedimensional three dimensional, dimensional three-dimensional fullspace full space timeharmonic time harmonic practice sharplyvarying sharply varying surface derivation mediums medium s discontinuities parameters

RESUMO Apesar de terem sido estudos realizados por autores diferentes e de certa forma independente um do outro, as teorias das Implicaturas de Paul Grice e dos Atos de Discurso Indiretos de John Searle não apenas estão intimamente ligadas como, na verdade, são complementares entre si, de modo que se mostra de crucial importância a compreensão dos dois juntos, a fim de se obter um maior domínio da noção de “não literalidade” das enunciações. Este trabalho tratará de mostrar as principais características de ambas as teorias e como elas se inter-relacionam orgânica e simbioticamente. outro verdade si juntos literalidade enunciações interrelacionam inter relacionam simbioticamente

ABSTRACT Although these are studies performed by different authors and in a certain way independent from one another, the theories of Implicatures by Paul Grice and of Indirect Speech Acts by John Searle are not only deep linked but, in fact, are mutually complementary, for we can see the crucial importance of the comprehension of both of them in order to obtain a better grasp on the notion of “Non-literality.” This work will show the main properties of both theories and how they work together in an organic and symbiotic way. another but fact complementary Nonliterality. Nonliterality Non literality. literality “Non-literality. “Non-literality

ABSTRACT Coronary artery fistula draining into the coronary sinus is a rare vascular malformation, and its diagnosis and clinical manifestations usually occur late. We describe the case of a 72-year-old female patient with dyspnea on exertion (New York Heart Association Class III) associated with palpitations. The transthoracic echocardiogram showed significant tricuspid insufficiency. Cardiac catheterization showed aneurysm of the circumflex coronary artery and fistula of this artery draining into the coronary sinus. The patient underwent fistula ligation and tricuspid valve repair, with excellent surgical results.