O Esporte Sem Parar é um projeto de extensão da Secretaria Nacional de Esporte, Lazer e Inclusão Social, em parceria com a ONG Contato e a Universidade Federal do Estado do Rio de Janeiro. Este ...artigo objetiva relatar a experiência do encontro de capacitação presencial da equipe do projeto durante a pandemia de COVID-19, na perspectiva da Teoria da Expectativa de Vroom. Estudo qualitativo, do tipo relato de experiência. Os resultados mostram que a biossegurança, diante de estabilidade epidemiológica, viabiliza treinamentos presenciais. A expectativa encontrada foi que o esforço empregado pela equipe conduzirá à realização pessoal, criação de vínculo, inclusão social, melhora da saúde, relacionamento interpessoal, espaço de convivência e apoio às pessoas socialmente vulneráveis. Conclui-se que a melhora na qualidade de vida possui valência para estes participantes, segundo a Teoria da Expectativa de Vroom, e pode ser a motivação para profissionais e participantes continuarem as atividades
The optimization of economic load dispatch (ELD) is one of the oldest and most important tasks in power plant management. The objective of this paper was to analyze a new solution of the old problem ...of the ELD optimization by differential evolution (DE) including turning off the most inefficient generators. The criteria of incremental fuel costs and losses are used to determine the best parameters of active power of each
i
th generator unit, ensuring that the demand and total losses are equal to the total generated power but minimizing the total cost of fuel. Materials and methods have been developed to solve the ELD, including lambda iteration method, gradient method, Newton’s method and so on. The results found for this case study, with the application of DE, were outstanding having a reduction of 19.88 % in the total fuel cost, comparing to classical methods that distribute the generation of power among all generators, including the least efficient ones. This method improves not only the efficiency of generation but also of the power plant generation planning.
Abstract The objective of this study was to assess the effect of the exposure to fluazuron on the activity of common pesticide detoxification enzyme groups in the cattle tick ( Rhipicephalus ...microplus ). Engorged females of a susceptible strain (POA) and a resistant strain (Jaguar) were exposed in vitro to fluazuron and their eggs and larvae were used to compare the activities of the general esterases, mixed-function oxidases (MFO) and glutathione-S-transferase (GST). The results showed significant elevation in MFO contents and esterases activity in the resistant strain when compared with the susceptible strain, in eggs and larvae respectively. In the POA strain, the MFO activity in eggs was down-regulated by fluazuron exposure. Based on these results, it can be concluded that different detoxification enzymes can act in distinct pathways depending on the tick's development stage, and may be related to fluazuron detoxification in resistant strains.
Thermal rate constants for the hydrogen abstraction reaction of methyl pentanoate were calculated using the multistructural canonical variational theory with small-curvature tunneling (MS-CVT/SCT). ...The conformational search for the stationary points generated by these reactions was performed with an algorithm that combines systematic and stochastic searches at dual-level. At the high-level (MPWB1K/6-31+G(d,p)), 244 geometries for methyl pentanoate and transition states were found. A systematic estimative of the efficiency of the truncation of multistructural rovibrational partition functions and its effects on thermal rate constants was carried out. In this analysis, we observed that rotation about -OCH
3
group (
4
) of the ester generates unstable structures with little contribution to the magnitude of the partition function. We also estimate that the truncation of the partition functions in a small set of conformations can produce deviations up to 75% compared to converged theoretical results.
Thermal rate constants for the hydrogen abstraction reaction of methyl pentanoate were calculated using the multistructural canonical variational theory with small-curvature tunneling (MS-CVT/SCT).
Thermal rate coefficients for the hydrogen abstraction reactions of prenol (3-methyl-2-butenol) by a hydrogen atom were calculated with the multipath canonical variational theory with small-curvature ...tunneling (MP-CVT/SCT). The conformational search was performed with a dual-level approach, and the multistructural torsional anharmonicity effects were corrected through the rovibrational partition function calculated with the multistructural method based on a coupled torsional potential (MS-T(C)). This methodology allows us to estimate the thermal rate constants in the temperature range of 200–2500 K and fit them into two analytical expressions. Differences between the number of conformations on the torsional potential energy surfaces for prenol and the transition state decrease the thermal rate constants for the H-abstraction at the α carbon. An opposite behavior was detected for the abstractions on the δ site. The product branching ratios were calculated using single-structure and multipath approaches. The product distributions from the former are shown to be inadequate for studying the mechanism under combustion conditions. The values estimated from MP-CVT/SCT rate coefficients indicated that the radicals from (R α) and (R δ)/(R δ′) are formed in considerable amounts. These species are fundamental in comprehending the inhibition and promotion of the autoignition phenomena.
Abstract Despite prenol emerging as a next‐generation biofuel, some questions about its mechanism still need to be adequately proposed to rationalize its consumption and evaluate its efficiency in ...spark‐ignition (SI) engines. Here, we present new insights into the reaction mechanism of prenol (3‐methyl‐2‐buten‐1‐ol) with OH radicals as a function of temperature and pressure. We have determined that the different temperature and pressure conditions control the preferred products. At combustion temperatures and low pressures, OH‐addition adducts are suppressed, increasing the formation of α and δ allylic radicals responsible for the auto‐ignition.
Overall thermal rate coefficients for the CH2CO + O (3P) ⟶ CH2 + CO2 reaction were estimated by combining the canonical variational theory with multidimensional small-curvature tunneling corrections ...(CVT/SCT) and multifaceted variable-reaction-coordinate transition state theory (VRC-TST) results. The energies, equilibrium geometries, and harmonic vibrational frequencies were calculated at M06-2X/aug-cc-pVTZ level of theory. Our thermal rate constants show excellent agreement with experimental data confirming the CH2 + CO2 as the most favorable channel. Fitted total thermal rate coefficients into a modified Arrhenius equation shows a temperature-dependent activation energy.
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•Thermal rate constants for CH2CO + O (3P) reaction.•Energetic, structural and spectroscopy parameters at M06-2X/aug-cc-pVTZ.•The products CH2 and CO2 are most favorable.•Activation energy is temperature-dependent.
Aiming to characterize the potential off-target effects of fluazuron on ticks, biochemical analyses were conducted to evaluate changes in the carbohydrate metabolism of Rhipicephalus (Boophilus) ...microplus ticks after exposure to fluazuron. Hemolymph and fat body were collected from female ticks before and after (4, 8 and 15 days) exposure to fluazuron. Spectrophotometric analyses were done to quantify glucose concentration and lactate dehydrogenase (LDH) activity in the hemolymph and the concentration of glycogen in the tick's fat body. High Performance Liquid Chromatography (HPLC) was employed to determine the concentration of carboxylic acids in the hemolymph and to evaluate changes in intermediary metabolic processes requiring oxygen consumption. Increases in the levels of LDH activity and lactic acid concentration indicated that fluazuron enhanced fermentative metabolism in ticks. Exposure to fluazuron was also found to increase glucose concentrations in the hemolymph over time, although no significant differences were noted daily. In addition to expanding the body of knowledge about the mode of action of fluazuron, investigations into these mechanisms may also be useful in discovering new and as yet unexplored secondary effects.
To analyze the spatiotemporal distribution of mortality in older people living with the human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) in the state of São Paulo, Brazil.
...This is an ecological study with temporal and spatial approaches to analyze mortality from HIV/AIDS in the older adult population in the 2010-2020 period in the state of São Paulo, Brazil. Analysis of temporal trends was performed using the joinpoint regression, and spatial analysis was carried out using the Moran's index and the local empirical Bayesian model.
We identified a total of 3,070 deaths from HIV/AIDS among older adults and a mortality rate of 51.71 per 100 thousand inhabitants during the study period. The joinpoint method showed a growing trend for the age groups from 70 to 79 years (annual percent change APC=3.45; p=0.01) and ≥80 years (APC=6.60; p=0.006) and stability for the general older adult population (APC=0.99; p=0.226). The spatial distribution of the crude mortality rate was diffuse throughout the state. After smoothing by the Bayesian estimator, we observed greater concentration in the eastern mesoregions. In Moran's analysis, we observed clusters of lower mortality rates in more central regions; and of higher rates in the southern and northern regions of the state.
We found a major growing trend in mortality from HIV/AIDS in the age group of older adults over 69 years during the 2010-2020 period. Clusters of high mortality rates were located in regions further to the south and north of the state, where places of greater social inequalities are concentrated.
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