564 research outputs found

    Limit analysis for porous materials applied for slope stability analysis

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    Slope stability analysis is a classical geotechnical problem. It aims to characterize the potential failure surface and the slope safety factor for a given geometry and loading conditions. From a mechanical point of view the analysis is carried out to check the condition which soil structures failure. Failure condition can be analyzed by analyt- ical, experimental and numerical methods. Griffiths and Lane point out some methods used in the literature as the equilibrium method, modified Bishops method, Morgenstern and Price among others.The objective of this work is to evaluate the slope stability prob- lem, considering the soil as a porous media obeying the yield function proposed by Ulm, Cariou and Gathier

    Estoque de raízes em sistemas agroflorestais sequenciais tradicional e alternativo na Amazônia Oriental.

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    As raízes são a principal fonte de entrada de matéria orgânica para o solo, principalmente em sistemas que utilizam o fogo para o preparo de área. O objetivo do trabalho foi avaliar o estoque de raízes em diferentes manejos da vegetação secundária em sistemas agroflorestal sequencial na Amazônia Oriental. O trabalho foi desenvolvido no município de Igarapé-Açu (PA) em Latossolo amarelo de textura média. Avaliaram-se os seguintes tratamentos: dois sistemas agroflorestais seqüenciais diferentes (com queima e com trituração no preparo de área) e uma floresta secundária (capoeira). As amostras de solo foram coletas com trado e armazenadas sob refrigeração. Em seguida, foram lavadas com água corrente sobre peneiras de 2 e 1 mm, nessa ordem, para retirada de partículas de solo. Em seguida, as amostras foram separadas em três classes de diâmetro (mm): ≤ 2,0; 2,1-5,0 e 5,1-10,0. Depois foram secas em estufa (65 ºC, 48 h) e pesadas. O estoque de raízes na classe de diâmetro ≤ 2 mm diferiu significativamente entre a capoeira e a trituração (média ± erro padrão, 0,45 ± 0,06 e 0,24 ± 0,04 Mg ha-1, respectivamente), porém estes não diferiram da queima (0,30 ± 0,03 Mg ha-1). Na classe de diâmetro de 2,1-5,0 mm, não houve diferença significativa entre os tratamentos avaliados. No período de estudo estabelecido, não foi possível detectar efeito dos diferentes manejos de preparo da área no estoque de raízes

    AI based monitoring violent action detection data for in-vehicle scenarios

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    With the evolution of technology associated with mobility and autonomy, Shared Autonomous Vehicles will be a reality. To ensure passenger safety, there is a need to create a monitoring system inside the vehicle capable of recognizing human actions. We introduce two datasets to train human action recognition inside the vehicle, focusing on violence detection. The InCar dataset tackles violent actions for in-car background which give us more realistic data. The InVicon dataset although doesn't have the realistic background as the InCar dataset can provide skeleton (3D body joints) data. This datasets were recorded with RGB, Depth, Ther-mal, Event-based, and Skeleton data. The resulting dataset contains 6 400 video samples and more than 3 million frames, collected from sixteen distinct subjects. The dataset contains 58 action classes, including violent and neutral (i.e., non-violent) activities.(c) 2022 Published by Elsevier Inc. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )This work has been supported by FCT-Fundacao para a Ciencia e Tecnologia within the R & D Units Project Scope: UIDB/00319/2020. This work was partly financed by European social funds through the Portugal 2020 program and by national funds through FCT-Foundation for Science and Technology within the scope of projects POCH-02-5369-FSE-000006. The author would also like to acknowledge FCT for the attributed Doctoral grant PD/BDE/150500/2019

    Desempenho produtivo e características de carcaça de ovinos terminados em pastagem nativa da Caatinga submetidos a diferentes suplementações de sal mineral.

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    Resumo: Objetivou-se com este estudo avaliar a influência de diferentes suplementos minerais sobre o desempenho e características de carcaça de ovinos em pastagem nativa da Caatinga. Utilizaram-se 24 ovinos em terminação mestiços Santa Inês, distribuídos em um delineamento inteiramente casualisado, em três tratamentos, conforme as seguintes suplementações de sal mineral: sal mineral comercial (SALMINC), sal mineral comercial acrescido de 750 ppm de zinco animal-1 (SALMINCZn) e sal comercial com fornecimento de 2,5 ml por peso vivo metabólico (PV)0,75 animal-1 de propilenoglicol (SALMINCPeg), com oito repetições cada. Não foi verificado diferenças (P>0,05) para desempenho, características de carcaça e seus rendimentos. A suplementação mineral acrescida de zinco ou propilenoglicol não implica em melhoria no desempenho e nas características de carcaça de ovinos em pastagem nativa da Caatinga. [Growth performance and carcass characteristics of sheep finished on native pasture Caatinga submitted to different salt mineral supplements]. Abstract: The aim with this study was to evaluate the influence of different mineral supplements on performance and carcass characteristics of sheep on native pasture Caatinga. Were used 24 crossbred sheep Santa Ines in termination, distributed in a completely randomized design, with three treatments, according to the following supplements of mineral salt: commercial mineral salt (SALMINC), commercial mineral salt plus 750 ppm of zinc per animal-1 (SALMINCZn) and commercial mineral salt supply with 2.5 ml of propylene glycol per metabolic body weight (BW)0.75 animal-1 (SALMINCPeg), with eight replicates each. There was no difference (P>0.05) on performance, carcass characteristics and their yields. Mineral supplementation plus of zinc or propylene glycol don't imply in improved in performance and carcass characteristics of sheep in native grass of Caatinga

    Caracterização agronômica e seleção de híbridos para o desenvolvimento de novas cultivares de uvas sem sementes para o Semiárido brasileiro.

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    O objetivo deste trabalho foi avaliar e selecionar híbridos procedentes de cruzamentos do programa de de melhoramento de uva sem sementes da Embrapa Semiárido

    Fractional Distillation of Organic Liquid Compounds Produced by Catalytic Cracking of Fats, Oils, and Grease

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    This work aims to investigate the fractional distillation of organic liquid products (OLP) obtained by catalytic cracking of palm oil (Elaeis guineensis Jacq.) at 450°C, 1.0 atm, with 5, 10, and 15% (wt) Na2CO3, using a stirred tank reactor of 143 L. The fractional distillations of OLP were carried out in laboratory scale with and without reflux using columns of different heights, and a pilot‐packed distillation column with internal reflux. OLP and distillation fractions (gasoline, kerosene, light diesel, and heavy diesel) were physicochemically characterized for density, kinematic viscosity, acid value, saponification value, refractive index, flash point, and copper strip corrosion. The OLP and light diesel fractions were analyzed by Fourier transform infrared spectroscopy (FT‐IR) and gas chromatography‐mass spectrometry (GC‐MS). For the experiments in laboratory scale, the yields of distillates decrease along with column height, with and without reflux, while those of bottoms products increase. The yields of distillates and gas increase with increasing Na2CO3 content, while those of bottoms products decrease. The densities of gasoline, kerosene, and light diesel produced in laboratory scale with reflux superpose exactly those of kerosene, light diesel, and heavy diesel produced in laboratory scale without reflux. The kinematic viscosity decreases with increasing column height for the experiments in laboratory scale. The acid values of distillation fractions decrease along with the column height for the experiments with and without reflux. The FT‐IR of distillation fractions in pilot and laboratory scales identified the presence of aliphatic hydrocarbons and oxygenates. The GC‐MS analysis identified OLP composition of 92.84% (area) hydrocarbons and 7.16% (area) oxygenates. The light diesel fraction contains 100% hydrocarbons with an acid value of 0.34 mg KOH/g, proving the technical feasibility of OLP de‐acidification by the fractional distillation process

    Longitudinal Association between Late-Life Depression (LLD) and Frailty:Findings from a Prospective Cohort Study (MiMiCS-FRAIL)

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    OBJECTIVES: The aim of the present study was to investigate whether late-life depression (LLD) is associated with incident frailty over time. DESIGN: Prospective cohort study, one-year follow-up. SETTING: Geriatric outpatient clinic, Southwestern of Brazil. PARTICIPANTS: 181 follow-up participants aged 60 years or over. MEASUREMENTS: Depressive disorders were classified as Major Depressive disorder (MDD) or Subthreshold Depression (STD) according to DSM-5 criteria. Depressive symptoms were assessed with validated versions of 15-item Geriatric Depression Scale (GDS-15) and 9-item Patient Health Questionnaire (PHQ-9). We performed binary logistic regressions to estimate the odds ratio (OR) for frailty in LLD adjusting for multiple confounders. Participants who were frail at baseline were excluded from the analyses according to measures of frailty (FRAIL questionnaire and 36-item Frailty Index, FI-36). We also estimated the risk ratio or relative risk (RR) and the risk difference (RD) for incident frailty. RESULTS: We observed a 2 to 4-fold increased risk for incident frailty among participants with LLD. The presence of a depressive disorder was significantly associated with the onset of frailty (adjusted OR for FRAIL and FI-36: 3.07 [95% CI = 1.03 - 9.17] and 3.76 [95% CI = 1.09 - 12.97], respectively. Notably, the risk for frailty due to LLD was significantly higher with the FI-36 compared to the FRAIL (RR: 3.03 versus 2.23). RD was of 17.3% and 12.7% with the FRAIL and the FI-36, respectively. CONCLUSION: Our data support the association between LLD and incident frailty over one year among geriatric outpatients, reinforcing longitudinal evidence from population-based studies
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