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| Registros recuperados: 223 | |
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| Tissière, Laurie; Mahévas, Stephanie; Michel, Charlotte; Trouillet, Brice. |
| A prospective approach can be used to establish management and environmental protection options to stimulate discussion and bring different scenarios for the future into perspective. This future-oriented process incorporates spatial dimensions with the development of a geoprospective approach. Indeed, a geoprospective approach highlights geographical dynamics and integrates spatial perspectives into the debate. A participatory framework for analyzing the marine fisheries sector has two main advantages. The first is academic, in that it helps to establish a methodological and epistemological corpus based on geoprospective. The method proposal allows, on the one hand, to discuss the purpose of the models and, on the other, to explore the role of researchers... |
| Tipo: Text |
Palavras-chave: Géoprospective; Modélisation; Participation; Méthodes mixtes; Démocratie et gouvernance environnementales; Pêches maritimes; Geoprospective; Modeling; Participation; Mixed methods; Environmental democracy and governance; Marine fisheries. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00664/77597/79611.pdf |
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| García y García,Axel; Dourado-Neto,Durval; Basanta,Maria del Valle; López Ovejero,Ramiro Fernando; Favarin,José Laércio. |
| The temporal variation of cumulative dry matter can be represented by a sigmoidal curve and the temporal variation of nutrient uptake follows this characteristic shape. Therefore, modeling the temporal variation of cumulative dry matter allows estimating nutrient uptake along the crop cycle. The objective of this study was to propose a sine model to estimate dry matter and macronutrient uptake, and to estimate the moments of maximum N and K uptake rates for the rice crop. The field experiment was carried out on a wetland area of Piracicaba, SP, Brazil, consisting of an Humic Haplaquept. The chosen rice variety was IAC 103, a middle season cycle and high yield. Observed variables were dry matter of different plant parts (root, leaf and stem, and panicle)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modeling; Sine function; Macronutrients. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300011 |
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| Streck,Nereu Augusto; Uhlmann,Lilian Osmari; Gabriel,Luana Fernandes. |
| The objective of this work was to test long-term trends in the duration of rice development phases in Santa Maria, RS, Brazil. The duration from emergence to V3 (EM-V3), emergence to panicle differentiation (EM-R1), emergence to anthesis (EM-R4), and emergence to all grains with brown hull (EM-R9) was calculated using leaf appearance and developmental models for four rice cultivars (IRGA 421, IRGA 417, EPAGRI 109, and EEA 406), for the period from 1912 to 2011, considering three emergence dates (early, mid, and late). The trend of the time series was tested with the non-parametric Mann-Kendall test, and the magnitude of the trend was estimated with simple linear regression. Rice development has changed over the last ten decades in this location, leading to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Development rate; Global warming; Growing season; Maturity group; Modeling; Phenology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000600001 |
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| Méléder, Vona; Savelli, Raphael; Barnett, Alexandre; Polsenaere, Pierre; Gernez, Pierre; Cugier, Philippe; Lerouxel, Astrid; Le Bris, Anthony; Dupuy, Christine; Le Fouest, Vincent; Lavaud, Johann. |
| The gross primary production (GPP) of intertidal mudflat microphytobenthos supports important ecosystem services such as shoreline stabilization and food production, and it contributes to blue carbon. However, monitoring microphytobenthos GPP over a long-term and large spatial scale is rendered difficult by its high temporal and spatial variability. To overcome this issue, we developed an algorithm to map microphytobenthos GPP in which the following are coupled: (i) NDVI maps derived from high spatial resolution satellite images (SPOT6 or Pléiades), estimating the horizontal distribution of the microphytobenthos biomass; (ii) emersion time, photosynthetically active radiation (PAR), and mud surface temperature simulated from the physical model MARS-3D;... |
| Tipo: Text |
Palavras-chave: Microphytobenthos; Intertidal mudflat; Gross primary production; Remote sensing; NDVI; Modeling. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00643/75531/76429.pdf |
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| Vega-Gálvez,Antonio; Dagnino-Subiabre,Alexies; Terreros,Gonzalo; López,Jessica; Miranda,Margarita; Di Scala,Karina. |
| Drying kinetics of quinoa-supplemented feed for laboratory rats during processing at 50, 60, 70, 80 and 90ºC was studied and modeled in this work. Desorption isotherm was obtained at 60ºC giving a monolayer moisture content of 0.04 g water/g d.m. The experimental drying curves showed that drying process took place only in the falling rate period. Several thin-layer drying equations available in the literature were evaluated based on determination coefficient (r²), sum squared errors (SSE) and Chi-square (χ2) statisticals. In comparison to the experimental moisture values, the values estimated with the Logarithmic model gave the best fit quality (r² >0.994, SSE < 0.00015 and χ2 < 0.00018), showing this equation could predict very accurately the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rat feed; Quinoa; Drying kinetics; Modeling; Statistical test. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100021 |
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| Mirzabe, Amir Hossein; Khazaei, Javad; Chegini, Gholam Reza. |
| For 100 sunflower head, maximum and minimum diameters, thickness, height of the ground, and mass of all seeds on sunflower head (SH) for five conventional varieties were measured. To examine the correlation between maximum SH diameter and minimum SH diameter, SH thickness, SH height from the ground and SH seeds mass, linear regression method was used. Also SH diameter and SH thickness of four sunflower hybrids varieties were measured. Log-normal, Weibull and Generalized extreme value (G.E.V) distribution were used in order to model SH diameter and SH thickness distributions of all varieties and hybrids; also, Kolmogorov-Smirnov methods were used for comparison of all probability density. Results indicated that value of average of dimensions, geometric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thresher machine; Image processing technique; Modeling; Generalized extreme value; Log-normal; Wiebull. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3641 |
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| Tischendorf, Lutz; ELUTIS Modelling and Consulting Inc.; lutz.tischendorf@gmx.net; Grez, Audrey; Universidad de Chile; agrez@uchile.cl; Fahrig, Lenore; Carleton University; lfahrig@ccs.carleton.ca. |
| We conducted a factorial simulation experiment to analyze the relative importance of movement pattern, boundary-crossing probability, and mortality in habitat and matrix on population density, and its dependency on habitat fragmentation, as well as inter-patch distance. We also examined how the initial response of a species to a fragmentation event may affect our observations of population density in post-fragmentation experiments. We found that the boundary-crossing probability from habitat to matrix, which partly determines the emigration rate, is the most important determinant for population density within habitat patches. The probability of crossing a boundary from matrix to habitat had a weaker, but positive, effect on population density. Movement... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Boundary crossing; Emigration; Habitat fragmentation; Immigration; Modeling; Movement; Population density; Simulation; Time scale. |
| Ano: 2005 |
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| Stolf,Rubismar; Thurler,Álvaro de Mendonça; Bacchi,Osny Oliveira Santos; Reichardt,Klaus. |
| Macroporosity is often used in the determination of soil compaction. Reduced macroporosity can lead to poor drainage, low root aeration and soil degradation. The aim of this study was to develop and test different models to estimate macro and microporosity efficiently, using multiple regression. Ten soils were selected within a large range of textures: sand (Sa) 0.07-0.84; silt 0.03-0.24; clay 0.13-0.78 kg kg-1 and subjected to three compaction levels (three bulk densities, BD). Two models with similar accuracy were selected, with a mean error of about 0.02 m³ m-3 (2 %). The model y = a + b.BD + c.Sa, named model 2, was selected for its simplicity to estimate Macro (Ma), Micro (Mi) or total porosity (TP): Ma = 0.693 - 0.465 BD + 0.212 Sa; Mi = 0.337 +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Degree of compaction; Modeling; Macropore; Texture; Maximum bulk density; Relative bulk density. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000200014 |
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| Ojeda,Nelson; Rebolledo,Ramón; Calzadilla,Soraya; Soto,Hector; Morales,Luis. |
| Semidalis kolbei occupies a significant area of south central Chile. However, it is necessary to determine and predict the occurrence of the insect at a given site. The aim of this research is to analyze the potential spatial distribution of S. kolbei in La Araucanía Region of Chile. The study compares ordinary kriging (OK) interpolation methods, geographically weighted regression (GWR) and global regression (GR). The following variables were used in the investigation: topography (altitude, aspect, and slope), distance from the littoral, climate, and geographical variables (latitude and longitude). Of the models evaluated, the GWR proved to be the most successful. This model revealed a marked east-west gradient in the distribution of S. kolbei and a... |
| Tipo: Journal article |
Palavras-chave: Araucanía Region; Chile; Modeling; Potential spatial distribution; Semidalis kolbei. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000300007 |
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| Peña,Wilmer Edgard Luera; Massaguer,Pilar Rodriguez de; Teixeira,Luciano Quintão. |
| The nisin effect on thermal death of Alicyclobacillus acidoterrestris CRA 7152 spores in concentrated orange juice (64ºBrix) was studied. Concentrations of 0, 50, 75 and 100 IU of nisin/ml juice, at temperatures of 92, 95, 98 and 102ºC were evaluated. The quadratic polynomial model was used to analyze the effects of the factors and their interaction. Verification of surviving spores was carried out through plating in K medium (pH 3.7). The results showed that the D values without nisin addition were 25.5, 12.9, 6.1 and 2.3 min for 92, 95, 98 and 102ºC respectively. With addition of nisin into the juice there was a drop of heat resistance as the concentration was increased at a same temperature. With 30, 50, 75, 100 and 150 IU/ml at 95ºC, the D values were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alicyclobacillus acidoterrestris; Orange juice concentrate; Modeling. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300024 |
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| Tabase, Raphael Kubeba. |
| The study aims to develop a test platform (TP) compartment that could mimic diurnal variations in indoor climate and NH3 emission in a real pig compartment and to compare diurnal indoor climate and NH3 production between two TP compartments and a real compartment. The objectives were achieved by using a real and TP compartment followed by an ad hoc test that used two TP compartments and another real compartment. The TP had two compartments equipped with mock-up pigs as heat source and automatic urea solution spraying installation to mimic pig urination at the pen floor. The study evaluated indoor climate and NH3 production in a 4-day comparative test between a TP and a real compartment followed by a 3-day comparative test between two TP compartments and a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia; Emission; Modeling; Pig housing; Test platform; Ventilation; Belgium. |
| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5216 |
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| SILVA, R. de O.; TERNES, S.. |
| A modelagem matemática desempenha um importante papel na pesquisa biológica. Uma vez que o sistema estudado é representado em linguagem matemática, torna-se possível prever seu comportamento por meio de simulações. Nesse contexto, surge a necessidade do uso de softwares robustos, capazes de computar, construir gráficos, resolver sistemas e equações, assim como gerar aproximações numéricas. Existe, no mercado, uma infinidade de softwares matemáticos, sistemas computacionais numéricos e algébricos e ferramentas de simulação. Há produtos comerciais muito utilizados pela comunidade científica como Mathematica (WOLFRAM, 1999) e Matlab (THE MATHWORKS, 1998), e softwares não comerciais que podem ser utilizados como alternativa às ferramentas proprietárias. Além... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Modelagem matemática; Sistemas biológicos; Ferramentas open source; Modeling; Simulation.; Simulação.. |
| Ano: 2010 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/885653 |
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| pourbagher, roghayeh; rohani, abbas; rahmati, Mohammad Hashem; Abbaspour-Fard, Mohammad Hossein. |
| This paper investigated the effect of the components of fluidized bed dryer with two thermal sources of heater and infrared such as air temperature at three levels (40, 50 and 60°C) equivalent to radiation intensity of 0.031, 0.042 and 0.053 W.cm-3 in infrared dryer, final moisture content of dried Tarom and Shirudi varieties at three levels (8-9%, 9-10% and 10-11% (d.b.)) and air velocity of 4.5 ms-1 on the milling characteristic and drying time. To this end, stepwise regression was used for selecting the best models for each dependent variable in terms of the independent variables and genetic algorithm was used for optimizing the parameters of dryer with simultaneous consideration of cracked and fractured grains, milling recovery, degree of milling and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modeling; Optimization; Infrared; Milling characteristic; Paddy. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4666 |
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| Jordan,Rodrigo A.; Cortez,Luís A. B.; Silveira Jr.,Vivaldo; Cavalcanti- Mata,Mário E. R. M.; Oliveira,Fellipe D. de. |
| ABSTRACT Based on mass and energy balance equations and data collected in specialized bibliographies, it was proposed a methodology for modeling of an ice bank for thermal storage of energy at low temperature to be used in milk cooling. The data obtained by the equations arrangement were used in the design and installation of a real system, which was tested to collect data and to compare it with the estimated. The data obtained in terms of prediction of ice formation, temperature of the ice bank, water and capacity of the selected refrigeration system prove the adequacy of the equations arrangement, showing that it can be used as a tool for sizing solid ice bank in smooth pipe coils, with good approximation. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Milk cooling; Modeling; Thermal storage. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400510 |
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| Registros recuperados: 223 | |
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