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| Registros recuperados: 223 | |
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| Valente,Domingos S. M.; Queiroz,Daniel M. de; Corrêa,Paulo C.; Silva,Luis C. da; Vale,Sônia M. L. R. do. |
| Many research works have being carried out on analyzing grain storage facility costs; however a few of them had taken into account the analysis of factors associated to all pre-processing and storage steps. The objective of this work was to develop a decision support system for determining the grain storage facility costs and utilization fees in grain storage facilities. The data of a CONAB storage facility located in Ponta Grossa - PR, Brazil, was used as input of the system developed to analyze its specific characteristics, such as amount of product received and stored throughout the year, hourly capacity of drying, cleaning, and receiving, and dispatch. By applying the decision support system, it was observed that the reception and expedition costs were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Costs; Modeling; Software. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000400012 |
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| Kangas, Katja M; Natural Resources Institute Finland, Oulu; katja.kangas@luke.fi; Tolvanen, Anne; Natural Resources Institute Finland, Oulu; Department of Ecology, University of Oulu; anne.tolvanen@luke.fi; Tarvainen, Oili; Natural Resources Institute Finland, Oulu; oili.tarvainen@luke.fi; Nikula, Ari; Natural Resources Institute Finland, Rovaniemi; ari.nikula@luke.fi; Nivala, Vesa; Natural Resources Institute Finland, Rovaniemi; vesa.nivala@luke.fi; Huhta, Esa; Natural Resources Institute Finland, Rovaniemi; esa.huhta@luke.fi. |
| We present a new method for ecologically sustainable land use planning within multiple land use schemes. Our aims were (1) to develop a method that can be used to locate important areas based on their ecological values; (2) to evaluate the quality, quantity, availability, and usability of existing ecological data sets; and (3) to demonstrate the use of the method in Eastern Finland, where there are requirements for the simultaneous development of nature conservation, tourism, and recreation. We compiled all available ecological data sets from the study area, complemented the missing data using habitat suitability modeling, calculated the total ecological score (TES) for each 1 ha grid cell in the study area, and finally, demonstrated the use of TES in... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Biodiversity; Conservation; Ecological value; Land use planning; Modeling; Spatial data; Tourism. |
| Ano: 2016 |
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| Bacher, Cedric; Baud, Jean-pierre; Bodoy, Alain; Deslous-paoli, Jean-marc; Dreno, Jean-paul; Heral, Maurice; Maurer, Daniele; Prou, Jean. |
| An assessment of the reared stocks of the Pacific oyster (Crassostrea gigas ) has been recently conducted on the major French areas of molluscs culture. The methodology proposed included both estimates of densities obtained by subsampling in the field, and aerial photographs which covered the cultivated, intertidal area. The size and the number of samples were designed to reach a precision of 10% on the final assessment in each area. The field work consisted in weighing and counting the oyster in unit areas of 0.5 m2 for the bottom culture or in trays or bags, for the off bottom technique. These results give a better knowledge of the technique evolution and of the general structures in the cultivated areas. |
| Tipo: Text |
Palavras-chave: Modeling; Estimation; Stocks; Crassostrea gigas; Oysters. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1986/acte-2864.pdf |
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| Ndoye, S; Capet, Xavier; Estrade, Philippe; Machu, Eric; Kounta, L; Sow, B; Diakhate, M; Gayet, At. |
| The regional ocean circulation along the Southern Senegal shelf is studied using a numerical model for varying forcing fields during the upwelling season (November-May). The main objective is to study the shelf circulation of the marine environment in the Southern Senegal Upwelling Shelf (SSUS), the Lagrangian pathways by which waters are transported to the surface in the upwelling tongue and the fate of these waters. Model results are compared with hydrographic measurements during UPSEN2-ECOAO survey and satellite images datasets. The upwelling source waters and also the warm nearshore waters are analyzed, from a Lagrangian point of view, by computing the paths of particles that are passively advected by the regional ocean model velocity field (ROMS). It... |
| Tipo: Text |
Palavras-chave: Upwelling; Ocean circulation; Modeling; Coastal dynamics; Shelf; ROMS.. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00472/58346/60900.pdf |
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| Lynam, Timothy; Tropical Resource Ecology Program, University of Zimbabwe; tlynam@science.uz.ac.zw. |
| Zambezi Valley agro-ecosystems are environmentally, economically, and institutionally variable. This variability means that it is not possible to measure everything necessary to develop a predictive understanding of them. In particular, because people and their environments are constantly changing, what was measured yesterday may change by tomorrow. Here, I describe elements of the approach that I have developed to address this problem. Called DAAWN, for Detail as and When Needed, the approach advocates an iterative and multiscaled methodology in which we first capture as broad an understanding of the system as possible and then use awareness developed at this scale to identify where to focus subsequent, more detailed, investigations. Because we cannot... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Comples adaptive systems; Household and resource economics; Livelihood strategies; Modeling; Multi-agent simulation models; Natural resource use; Participatory systems analysis; Southern Africa; Spidergrams. |
| Ano: 1999 |
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| Aparecido,Lucas Eduardo de Oliveira; Batista,Rafael Madureira; Moraes,José Reinaldo da Silva Cabral de; Costa,Cícero Teixeira Silva; Moraes-Oliveira,Adriana Ferreira de. |
| Abstract: The objective of this work was to elaborate the agricultural zoning of climatic risk (ZARC) for Physalis peruviana, through the thermal and water requirements of the crop in Southeastern Brazil. Air temperature (TAIR) and precipitation (PYEAR) data from 1,530 meteorological stations covering the entire region were used. Regions were considered climatically favorable to Physalis peruviana when TAIR was between 13 and 18ºC and PYEAR between 1,000 and 2,000 mm per year. Regions where TAIR was above 30ºC or less than 13ºC were considered inapt. Maps were created with this information and used to identify climatic characteristics and to establish the agricultural aptitude classes, termed apt, inapt, and marginal for the cultivation of Physalis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climate risk; Agrometeorology; Modeling; Big data. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000100900 |
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| Paulino,Silvia Elisandra Pasqua; Mourão Filho,Francisco de Assis Alves; Maia,Aline de Holanda Nunes; Avilés,Tatiana Eugenia Cantuarias; Dourado Neto,Durval. |
| The development of models that allow forecasting yield tendencies is important to all sectors of the citrus industry. This work evaluated the influence of meteorological variables in different phases of the crop cycle in order to propose empirical models to estimate the number of fruits per plant (NFP) of 'Valencia' and 'Hamlin' sweet oranges. NFP sampling data from the citrus juice industry of the State of São Paulo, on the total of 15 harvests (1990/91 to 2004/05), classified into three age classes, and meteorological data of maximum and minimum air temperature and rainfall of Limeira, SP, Brazil, were utilized. Correlation coefficients were initially computed between the number of fruits per plant and each meteorological variable used for water balance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus; Harvest; Modeling; Yield. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100001 |
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| Coelho,Anderson Prates; Faria,Rogério Teixeira de; Barbosa,Aline Michelle da Silva; Dalri,Alexandre Barcellos; Rosalen,David Luciano. |
| ABSTRACT One of the benefits of irrigation with wastewater in agriculture is the reduction in the use of mineral fertilizers and the increase in crop yield. For wastewater application, the use of remote sensing can help to define specific management areas. The aim of this study was to evaluate the yield and the growth of irrigated white oats (Avena sativa L.) with varying treated sewage effluent (TSE) levels. These attributes were then correlated with Normalized Difference Vegetation Index (NDVI) values obtained at four phenological stages of the crop and used to define critical limits of NDVI. The experiment consisted of five TSE treatments differing in irrigation depths (11, 31, 60, 87, and 100%). Mean NDVI values in the crop were determined with an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena sativa L.; Biomass; Modeling; NDVI; Remote sensing. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400553 |
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| Durgadoo, Jonathan V.; Loveday, Benjamin R.; Reason, Chris J. C.; Penven, Pierrick; Biastoch, Arne. |
| The Agulhas Current plays a crucial role in the thermohaline circulation through its leakage into the South Atlantic Ocean. Under both past and present climates, the trade winds and westerlies could have the ability to modulate the amount of Indian-Atlantic inflow. Compelling arguments have been put forward suggesting that trade winds alone have little impact on the magnitude of Agulhas leakage. Here, employing three ocean models for robust analysisa global coarse-resolution, a regional eddy-permitting, and a nested high-resolution eddy-resolving configurationand systematically altering the position and intensity of the westerly wind belt in a series of sensitivity experiments, it is shown that the westerlies, in particular their intensity, control the... |
| Tipo: Text |
Palavras-chave: Boundary currents; Meridional overturning circulation; Wind stress; Mesoscale models; Numerical analysis; Modeling. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00161/27247/25452.pdf |
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| Priour, Daniel; De La Prada, Amelia. |
| Measurements at sea during fishing trials on bottom trawl have revealed that the geometry of the trawl is affected by the catch. A series of 37 hauls of around 3 h were carried out during the French EFFICHALUT project. The aim of this project was to carry out improvements on the fishing gear in order to reduce energy consumption. For this project, numerous sensors were used: for bridle tension, door spread, vertical opening, and door attitude. The measurements show quite clearly that the door spread decreases and the bridle tension increases during most of the hauls. The door spread decreased by 1.35 m/h, with a standard deviation of 1.98 m/h while the top bridle tension increased by 47 kg/h, with a standard deviation of 59 kg/h. The mean catch per haul... |
| Tipo: Text |
Palavras-chave: Trawl; Data; Modeling; Door spread; Bridle tension; Catch weight. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00239/34990/33525.pdf |
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| González Covarrubias, Galdino Daniel. |
| En el presente estudio se realizó el análisis de las Unidades de Riego con aprovechamiento superficial en la Cuenca Lerma Chapala, México, a través de la georrefenciación y caracterización de la infraestructura hidroagrícola, padrón de usuarios y catastro, integrándolos en un Modelo de Sistema de Información Geográfica (SIG). Esto permitió conocer en forma precisa la información relevante de dichas Unidades. Se caracterizaron 1,364 unidades de riego con un total de 56,266 usuarios que detentan 114,975.26 hectáreas. La longitud de la red de conducción es de 2,435 km y la longitud de la red de drenaje es de 2,643 km, y 34,965 estructuras de control. La integración de las capas de información generadas en formato shape-file (*.shp) al Modelo de SIG de la... |
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Palavras-chave: Modelación; SIG; Riego; Agua; Sustentabilidad; Cuenca; Modeling; GIS; Irrigation; Water; Sustainability; Watershed; Hidrociencias; Maestría Tecnológica. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2072 |
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| Laajimi, Abderraouf; Guesmi, Anis; Mahfoudhi, A.; Dhehibi, Boubaker. |
| In Tunisia, peaches have a significant place in the fruit tree sector. Planted areas have been expanding ever since the eighties as a result of irrigation water extension and the use of better yielding varieties. These factors resulted in high production levels and fruit exports thereof. However, important seasonal and annual variation of fruit supplies continues to characterize prices at both wholesale and consumption levels. To study the response of peach production an econometric model was developed. Modelling was carried out in two stages. First area variation was explained through new plantings and removals and second yield variation was analyzed. The methodological approach followed takes into account the characteristics and... |
| Tipo: Journal Article |
Palavras-chave: Supply response; Modeling; Price expectations; Peaches; Demand and Price Analysis. |
| Ano: 2009 |
URL: http://purl.umn.edu/93801 |
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| Lovato,Gustavo Dias; Vale,Marcos Martinez do; Oliveira,Vladimir de; Klein,Daniela Regina; Branco,Tatiane. |
| ABSTRACT The objective of this study was to evaluate a growth model applied to adjust nutritional programs for growing and finishing pigs, in a commercial production context. The phase I (calibration) was conducted in a commercial pig production unit. The data were collected from a nutritional program, a feed program, and an animal profile. In experimental phase II, these data were entered in the InraPorc® model for simulations and to propose adjustments to the commercial nutritional program. Afterwards, the conventional nutritional program (CNP) and the adjusted nutritional program (ANP) were compared with InraPorc® simulation. Animal profile was collected by weighing 30% of pigs per stall and monitoring their feed intake in each stage. Four hundred and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: InraPorc®; Modeling; Pig production; Temperature. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000900755 |
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| Azadbakht, Mohsen; Vahedi Torshizi, Mohammad; Kashaninejad, Mahdi. |
| Three voltage gradients (8.38, 10.83, and 13.33 V cm-1) and three weight loss percentages (10, 20, and 30 percent) were examined; also the system performance coefficient, input current, heating process duration, power consumption and electrical conductivity investigated. The response surface method was also used for modeling s and optimization. For the response surface method, weight loss percentage and voltage gradient were selected as independent variables; and factors system performance coefficient, heating process duration, input current, power consumption and electrical conductivity were selected as responses. According to results, all obtained models were significant for responses factors, but the voltage gradient and weight loss percentage were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sour orange juice; Ohmic method; Response surface method; Modeling. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6057 |
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| Campbell, Bruce; Center for International Forestry Research (CIFOR); b.campbell@cgiar.org; Sayer, Jeffrey A; WWF (World Wildlife Fund); jsayer@wwfint.org; Frost, Peter; Institute of Environmental Studies; pfrost@compcentre.uz.ac.zw; Vermeulen, Sonja; International Institute for Environment and Development; sonja.vermeulen@iied.org; Cunningham, Tony; World Wildlife Fund/UNESCO/Kew People and Plants Initiative; peopleplants@bigpond.com; Prabhu, Ravi; CIFOR Regional Office; r.prabhu@cgiar.org. |
| Assessing the performance of management is central to natural resource management, in terms of improving the efficiency of interventions in an adaptive-learning cycle. This is not simple, given that such systems generally have multiple scales of interaction and response; high frequency of nonlinearity, uncertainty, and time lags; multiple stakeholders with contrasting objectives; and a high degree of context specificity. The importance of bounding the problem and preparing a conceptual model of the system is highlighted. We suggest that the capital assets approach to livelihoods may be an appropriate organizing principle for the selection of indicators of system performance. In this approach, five capital assets are recognized: physical, financial, social,... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Capital assets; Conceptual models; Decision support; Livelihoods; Modeling; Multivariate statistics; Natural resource systems; Performance; Zimbabwe. |
| Ano: 2001 |
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| Registros recuperados: 223 | |
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