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| Registros recuperados: 24 | |
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| Solazzi, Luigi; Scalmana, Roberto; Adamini, Riccardo; Faglia, Rodolfo; Borboni, Alberto. |
| This work describes the complete design of an olive picking machine especially conceived for secular olive plants with the purpose of increasing the mechanization level of the harvest operation and permitting the production of high quality oil; the design is made considering all the mechanical, agronomical and economical aspects involved in this issue. Once defined the picking technique, the first step consists in the design of the shacking device used for the separation of the olives from the plant, the next step is the design of the support structure, including the arms and the frame; finally there is a description of the hydraulic plant that drives the moving parts of the machine; in order to increase the flexibility of the machine, it is adapted also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering; Mechanical design; Applied mechanics Olive picker mechanical harvest olive oil secular olive trees. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2833 |
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| da Costa Neto, Wilson Valente; Izard, Miguel Garrido; Elorza, Pilar Barreiro; Domingues, Fabrício. |
| Grape harvest is still fully manual in the majority of farms in Brazil (above 99%), yet the structure of the fields and the vine trellis are already prepared for it in a 24% of the cases. Besides, only the large-size farms are prepared for performing a detailed analysis of working capacity, product quality and losses; data of great value when trying to quantitatively address the incorporation of machinery. The fact that grape harvest in South America (and South Africa) be complementary in season compared to Europe, or North America, makes this potential market of Brazil an interesting option for European manufacturers. In this work, we have supervised a whole grape harvest season, in a 552ha farm, where both, mechanical (trailed) and manual harvest, are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farm management system; Agricultural engineering; Viticulture in Brazil; Grape harvest; Case study.. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4015 |
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| Emesu, Pius; Mabuza, Phumuza. |
| The morama bean (Tylosema esculentum) is an underutilised legume native to the Kalahari region of Southern Africa. Some engineering properties relevant to the mechanisation of its processing have been characterised, namely; size, shape, surface area, projected area, volume, density, porosity, 1000-grain mass, static angle of repose, static coefficient of friction and texture. At moisture content of 7.4% (w.b.), the average length, width and thickness of the beans were 19.25, 17.21 and 13.39 mm, respectively. Geometric mean, equivalent diameter and arithmetic mean diameters were 16.4, 16.51 and 16.61 mm, respectively. Morama beans are spherical in shape, having average sphericity of 85.45%, aspect ratio of 0.90 and flakiness ratio of 0.78. Surface... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering; Post-harvest technology; Agricultural processing morama dimensional properties gravimetric properties flow properties texture. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2843 |
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| Jahangiri, Mehdi; Hassan-Beygi, Seyed Reza; Aboonajmi, Mohammad; Lotfi, Mahmoud. |
| In this research, the effects of storage duration and storage conditions on mechanical properties of cucumber fruit (Viola variety) were evaluated at different positions of the fruit length. The cucumber fruit mechanical properties determined in this study were firmness, apparent modulus of elasticity, failure stress, failure strain and failure energy. The mechanical properties determined under compression loading using puncture and uni-axial compression tests. The results showed that the storage duration, storage conditions and fruit test position had significant (P<0.01) effect on the mechanical properties of Viola cucumber fruit. The samples firmness, modulus of elasticity, failure stress and failure energy reduced about 49%, 39%, 38% and 33%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering; Agro-technology cucumber apparent modulus of elasticity storage failure energy firmness stress strain. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3615 |
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| Al-Jumaili, Ahmed Abed Ali; Salyani, Masoud. |
| Wind velocity and direction, which are normally reported at certain time intervals, fluctuate substantially within a short time frame. These fluctuations may have a significant effect on spray deposition of air-assisted sprayers used in citrus production. Wind measurements are usually made inside or outside a grove at about 10 m height but the latter may not accurately represent the wind conditions within the grove. The objective of this study was to compare data recorded by the Florida Automated Weather Network (FAWN) outside the grove at 10.0 m above the ground with the measurements made within a citrus grove at different heights. Within the grove, wind velocity and direction data were collected at 10.0, 3.6, 3.0, 2.4, 1.8, 1.2, and 0.6 m above the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering; Spray technology wind direction; Wind measurement site; Wind velocity; Wind sensors. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2555 |
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| Asoiro, Felix Uzochukwu; Okonkwo, Wilfred Ifeanyi; Akubuo, Clement Onyeaghala; Nweze, Nkechinyere O.; Anyanwu, Cosmas Ngozichukwu. |
| This study determined the effects of temperature and time on oil extraction from indigenous freshwater microalgae– Dictyosphaerium, Chlorella, Desmodesmus and Cosmarium species, cultured in fifteen 2-litre column photobioreactors (PBR) (three per specie). Growth and specific growth rates for the mixotrophic>autotrophic cultivation of the species. Oil was extracted from the dried microalgae species at temperatures ranging from 40 to 120 °C at 20 oC intervals and times ranging from 30 to 210 minutes at 30 minutes’ intervals, by accelerated solvent extraction method. Extraction temperature, time and type of microalgae species had significant effect (p < 0.05) on oil yield (temperature > time > type of species). As extraction temperature and time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering; Bioresources engineering; Biotechnology; Energy; Renewable energy; Agriculture. oil yield; Dictyosphaerium spp; Desmodesmus subspicatus; Chlorella lewinii; Cosmarium spp; Growth rate.. |
| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5247 |
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| Olosunde, William Adebisi; Aremu, Ademola Kabir; Okoko, Paul. |
| Evaporative cooling occurs when warm and unsaturated air is blown across a wet surface. This study reviews the development of simulation software as a research tool for designing evaporative cooling systems. The simulation incorporates information concerning the effect of the cooling pad length, cooling pad height, cooling pad thickness, air velocity, water flow rate, water temperature, water to air mass flow rate, and number of cooling pad segments in terms of the performance efficiency of the cooling system. The software rapidly produced model data, which was subjected to further analysis for verification and validation during the testing stage. The modelled and experimental data of the saturation efficiency were compared using 4 of the most important... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering; Crop processing and storage; Information processing Evaporative Cooling system Crop Storage MATLAB Simulation SPSS.. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3915 |
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| Sanjay B. Shah; NC State University; Praveen Kolar; Biological and Agricultural Engineering Department, North Carolina State University, Raleigh, NC 27695, USA. |
| Additives can reduce gaseous emissions from swine waste lagoons and pits. We have demonstrated for the first time that an additive has the potential to reduce methane emission from an anaerobic swine lagoon. ManureMax®, a humate product was evaluated for its ability to reduce gas and odor emissions from swine anaerobic lagoon and barn flush-water. Four treatments, Control (no additive), Low (label dosage), Medium (50% higher than label dosage), and High (200% higher than label dosage) were applied to inclined pipes installed in a swine lagoon. While the Medium and High treatments were not effective, the Low treatment reduced methane, 2-butanone, and tetrahydrofuran concentrations by 34%, 44%, and 57%, respectively vs. the Control in the pipe headspace.... |
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Palavras-chave: Agricultural engineering; Environmental engineering; Air quality; Greenhouse gases; Animal waste Hog; Mesocosm-scale; Methane; 2-butanone; Tetrahydrofuran; Volatile fatty acids; Toluene. |
| Ano: 2012 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2111 |
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| Cholaky,Carmen; Cisneros,José M; Balbuena,Roberto. |
| Initial soil conditions, operational aspects, and tool shape affect the efficiency of soil decompaction. The objective of this study was to evaluate the performance of a winged scarifier as a function of soil compaction and edaphic water content. The experiment was carried out in a typical Hapludoll. Treatments considered two soil compaction levels: high (HC) and low compaction (LC); and three soil water contents: wet (WS), humid (HS), and dry (DS) with 9, 14, and 19% gravimetric water content, respectively. A split-plot randomized block design was applied. Tractive effort, disturbed area, tillage depth, specific resistance, and power were evaluated. Results showed that tractive effort was 17% greater in HC than LC, and in both cases HS was greater than WS... |
| Tipo: Journal article |
Palavras-chave: Agricultural engineering; Winged scarifier; Bulk density; Water content; Compaction. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100016 |
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| Pérez de Corcho Fuentes,Jorge S; Garbati Pegna,Francesco; Iglesias Coronel,Ciro; García Reina,Francisco; Spugnoli,Paolo. |
| The power demand of the demolition of pineapple (Ananas comosus) fields, whose production cycle is finished with a flail mower with two different knives, a cutting apparatus with three angular velocities, and a tractor with three translation velocities, was determined using strain gage measures. The results of the investigations demónstrate the influence of the knife type and cinematic regime of the cutting apparatus in the demand of energy in the pineapple demolition. Furthermore, they permitted the validation of models of the power demand of the flail mower. |
| Tipo: Journal article |
Palavras-chave: Agricultural engineering; Agricultural machinery; Annas comosus; Energy mechanization. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100005 |
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| Registros recuperados: 24 | |
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