Fertilizer metering mechanism with helical conic cylindrical thread for family agriculture

Small rural farms are important for Brazilian agribusiness, but equipment suitable for distributing fertilizers on these properties is scarce. We studied a new fertilizer metering mechanism for use on the family farm. It combines a helical conic thread with a conventional fertilizer meter in a cylindrical section. The experimental plan was created using a 24 factorial design. An analysis of variance (ANOVA) was also conducted. The mechanism showed a positive result with respect to the uniformity of fertilizer flow (with a coefficient of variation of 3.1-5.8%), longitudinal distribution (with a coefficient of variation of 4%), and different types of fertilizers (in which variations between 2.7 and 3.5% were found).38693494

Population structure of Araucaria angustifolia in the Iguaçu National Park.

Estrutura populacional de Araucaria angustifolia no Parque Nacional do Iguaçu. O objetivo do presente trabalho foi analisar a estrutura populacional, regeneração e distribuição espacial de Araucaria angustifolia (Bertol.) Kuntz no interior de uma floresta natural e na borda de uma floresta com monocultura agrícola. Todos os indivíduos de araucária a partir de 10 cm de altura foram registrados em 200 parcelas de 10 x 10 m, sendo amostrados 479 indivíduos (416 na borda e 63 no interior). Desses, 33 eram fêmeas, 37 machos, 49 juvenis e 360 regenerantes. A estrutura da população apresentou padrão semelhante ao J-invertido. Os indivíduos regenerantes apresentaram principalmente o padrão agregado de distribuição, já para os juvenis, machos e fêmeas o padrão foi uniforme. A densidade do dossel influenciou a frequência de indivíduos, sendo observadas maiores frequências em maiores densidades, indicando que a regeneração da espécie é mais efetiva em ambientes sombreados. Devido ao grande número de indivíduos amostrados em diferentes classes de tamanho, o Parque Nacional do Iguaçu representa um importante remanescente na conservação de A. angustifolia

Lupus eritematoso sistémico asociado a vasculitis de vasos medianos

El Lupus Eritematoso Sistémico (LES) es una enfermedadautoinmune compleja que puede presentarsecon una amplia variedad de manifestacionesclínicas y serológicas, pudiendo afectarcualquier órgano.Las vasculitis se caracterizan por presencia deinfiltrado celular en la pared vascular de polimorfonuclearesy como consecuencia necrosis de lapared. Los síndromes vasculíticos se puedenagrupar en formas primarias, donde el procesofisiopatológico involucra directamente los vasossanguíneos y formas secundarias en las cualesla inflamación vascular ocurre como complicaciónde una enfermedad subyacente, principalmenteenfermedades autoinmunes, o desencadenadaspor factores exógenos como drogas, infeccioneso neoplasias...</p

Universal photonic processors in a glass-based femtosecond laser writing platform

Femtosecond laser writing (FLW) can open new perspectives on universal photonic processors (UPPs). We propose here two building blocks for the realization of FLW-UPPs and we show the preliminary results obtained on a 6-mode device

Universal photonic processors fabricated by femtosecond laser writing

Universal photonic processors (UPPs) are reconfigurable photonic integrated circuits able to implement arbitrary unitary transformations on an input photonic state. Femtosecond laser writing (FLW) allows for rapid and cost-effective fabrication of circuits with low propagation losses. A FLW process featuring thermal isolation allows for a dramatic reduction in dissipated power and crosstalk in integrated thermally-reconfigurable Mach-Zehnder interferometers (MZIs), especially when operated in vacuum, with 0.9 mW dissipation for full reconfiguration and 0.5% crosstalk at 785 nm wavelength. To demonstrate the potential of this technology we fabricated and characterized a 6-mode FLW-UPP in a rectangular MZI mesh with 30 thermal shifters

Maternal Parenting Practices and Psychosocial Adjustment of Primary School Children

This study was aimed at evaluating the associations between maternal parenting practices (positive, negative/inconsistent, and punitive), children’s difficulties (such as conduct problems, emotional symptoms, peer problems, and hyperactivity), and prosocial behaviors. Participants were 131 Italian mothers of primary school children; mothers were aged between 26 and 52 years (M = 38.38, SD = 5.46); children (54% girls) were aged between 6 and 10 years (M = 7.15, SD = 0.98). Mothers completed two scales assessing their parenting practices and their children’s psychosocial adjustment. A path analysis was run to test the hypothesized model. The results showed the following: (a) maternal positive parenting was negatively and significantly related to children’s conduct problems and hyperactivity, and positively and significantly to children’s prosocial behavior; (b) maternal negative/inconsistent parenting was positively and significantly related to children’s conduct problems, emotional symptoms, and hyperactivity; (c) maternal punitive parenting was positively and significantly related to children’s conduct problems and emotional symptoms. Moreover, the results showed that, according to the mothers’ perceptions, boys tended to exhibit higher levels of hyperactivity and peer problems and lower levels of prosocial behaviors than girls. Overall, this study highlights the unique role of different maternal parenting practices in the psychosocial adjustment of primary school children

The Araucaria dendrochronological network: growth patterns and climatic signals of paraná-pine on the Southern Brazilian plateau.

Ameridendro

Quantifying n -Photon Indistinguishability with a Cyclic Integrated Interferometer

We report on a universal method to measure the genuine indistinguishability of n photons - a crucial parameter that determines the accuracy of optical quantum computing. Our approach relies on a low-depth cyclic multiport interferometer with N=2n modes, leading to a quantum interference fringe whose visibility is a direct measurement of the genuine n-photon indistinguishability. We experimentally demonstrate this technique for an eight-mode integrated interferometer fabricated using femtosecond laser micromachining and four photons from a quantum dot single-photon source. We measure a four-photon indistinguishability up to 0.81±0.03. This value decreases as we intentionally alter the photon pairwise indistinguishability. The low-depth and low-loss multiport interferometer design provides an original path to evaluate the genuine indistinguishability of resource states of increasing photon number